Intermediate-Term Weather Outlook

This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks and a six-day World weather outlook which can be very useful for travelers.

First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Thu Aug 15 2024
Valid 12Z Thu Aug 15 2024 – 12Z Sat Aug 17 2024

…Flash flooding and severe weather threat continues over the Midwest the
next couple of days…

…Potentially dangerous heat anticipated across the southern Plains,
lower Mississippi Valley, and Gulf Coast…

A low pressure/frontal system traversing the center of the country
continues to help trigger rounds of showers and thunderstorms leading to
the threat of some flash flooding and severe weather. The low pressure
center is forecast to gradually push eastward through the Upper Midwest
today and reach the Great Lakes by the end of the week. A broad warm
sector supported by plentiful moisture, instability, and deep-layer shear
will allow for storms to potentially turn severe and contain heavy
rainfall throughout Missouri, Illinois, and into the lower Ohio Valley.
Storms should redevelop during the afternoon, increasing in coverage into
the evening, with a Slight Risk (level 2/4) of Excessive Rainfall in
effect given the threat for some intense downpours and potential training
convection leading to instances of flash flooding. A Slight Risk (level
2/5) of severe weather similarly covers the chance for some instances of
large hail and damaging winds. The system will push into the Lower Great
Lakes and Ohio/Tennessee Valleys by Friday and Saturday, with storms
likely to spread as far east as the Appalachians and Mid-Atlantic. Some
chances of isolated flash flooding and severe weather are forecast.

Heat will remain the major weather story throughout much of the
south-central U.S. into the beginning of this weekend and likely beyond.
Widespread highs into the upper 90s and triple digits are forecast to span
from the Southwest to the central Gulf Coast. Elevated humidity levels
will soar heat indices up to around 110 degrees for areas outside of the
Southwest and southern High Plains. However, actual high temperatures in
these more arid regions will be higher and well into the triple digits for
some locations. Low temperatures are anticipated to only drop into the
upper 70s and 80s for many locations, which could break several daily
records. This level of heat can affect anyone without effective cooling
and/or adequate hydration. Therefore, it is imperative to follow proper
heat safety and check on vulnerable individuals.

Elsewhere, some showers and storms will continue over New England as an
upper-level low churns over Nova Scotia. To the south, portions of
central/south Florida will also see scattered storm chances the next
couple of days as a cold front slowly pushes through. Some thunderstorms
will also be possible with a shortwave passing over portions of the
northern Great Basin today and into the northern Rockies by tonight.
Monsoonal moisture and storm chances are set to return to the Southwest
and central Great Basin by Saturday, where isolated flash flooding is the
greatest concern. Forecast high temperatures are expected to generally be
around average along the East Coast with mid- to upper 80s expected. Areas
of the Great Lakes/Upper Midwest behind the passing storm system will be
cooler with highs in the 70s. More temperatures near or above average are
expected over the northern/central Plains with highs in the 80s and 90s.
Highs across the northern tier of the West will remain below average, with
70s for the Pacific Northwest and low 80s into the northern Great Basin,
warming closer to average into the central Great Basin with mid-80s to low
90s.

To get your local forecast plus active alerts and warnings click HERE and enter your city, state or zip code.

Learn about wave patterns HERE.

Then, looking at the world and of course, the U.S. shows here also. Today we are looking at precipitation.

Please click on “Read More” below to access the full Daily Report issued today.

This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks and a six-day World weather outlook which can be very useful for travelers.

First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Tue Aug 13 2024
Valid 12Z Tue Aug 13 2024 – 12Z Thu Aug 15 2024

…Heavy rain and flash flooding threat forecast to stretch from the
central Plains to the Midwest over the next few days…

…Potentially dangerous heat anticipated across the southern Plains,
lower Mississippi Valley, and Gulf Coast…

…Fire weather concerns and poor air quality continues for portions of
the Pacific Northwest, Northern Rockies, and Great Basin…

A mid-August weather pattern continues to take shape this week with
numerous areas of scattered thunderstorms impacting the Nation. A
stationary front currently stretching from the Southeast to the central
High Plains will be the focus for much of this activity, with the boundary
eventually forecast to lift north into the Midwest by Wednesday night due
to a deepening low pressure system in the central Plains. The most likely
weather hazard over the next few days with developing thunderstorms is
expected to be associated with heavy rainfall creating instances of flash
flooding, as well as the potential for isolated areas of damaging wind
gusts. Specifically, three separate areas along the front stand out today
as having the greatest chances for scattered flash floods. Parts of South
Carolina remain sensitive to locally heavy rain as the area continues to
contain saturated ground conditions, leading to a continued threat for
flash flooding as long as the atmosphere supports slow-moving
thunderstorms. For much of eastern Kansas and Missouri, an initial complex
of thunderstorms is forecast to move through the region this morning
containing locally heavy rainfall, while a reforming area of convection
overnight into Wednesday could create additional flooding concerns. This
second round of heavy rain has the potential to produce a narrow corridor
of impressive rainfall totals within a few hours near south-central
Missouri. Additionally, northeast Colorado can expect another round of
storms containing intense rainfall rates this evening as activity forms
along the leeward side of the Rockies and pushes eastward. Residents and
visitors are advised to have multiple ways of receiving warnings, have a
plan should flash flooding occur, and never drive through flooded
roadways. By midweek much of the heavy rain and thunderstorm activity is
anticipated to gradually shift eastward to the Midwest and lower Ohio
Valley, along with the strengthening low pressure system and lifting warm
front. Once again heavy rain will be a concern as ample atmospheric
moisture content creates ripe conditions for scattered vigorous downpours.

Dangerous summer heat will be confined to the southern U.S. this week as
highs into the upper 90s and triple digits span from the Southwest to the
Gulf Coast. The most anomalous and potentially dangerous heat is forecast
across the southern Plains and Gulf Coast States through the end of the
week as highs reach up to 10 degrees above the climatological average for
mid-August. Elevated humidity levels will lead to maximum heat indices up
to 110 degrees during the day and low temperatures only dipping into the
upper 70s and low 80s at night. People spending greater time or effort
outdoors, or in a building without effective cooling, are at an increased
risk of heat-related illnesses.

A persistent pattern supporting fire weather concerns across much of the
central and northern Great Basin is forecast to continue today with dry
terrain and periods of gusty winds. Red Flag Warnings remain in place from
eastern Oregon to Idaho. Ongoing wildfires also continue to spread smoke
into the atmosphere, leading to poor air quality.

To get your local forecast plus active alerts and warnings click HERE and enter your city, state or zip code.

Learn about wave patterns HERE.

Then, looking at the world and of course, the U.S. shows here also. Today we are looking at precipitation.

Please click on “Read More” below to access the full Daily Report issued today.

This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks and a six-day World weather outlook which can be very useful for travelers.

First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Mon Aug 12 2024
Valid 12Z Mon Aug 12 2024 – 12Z Wed Aug 14 2024

…Unsettled weather with chances for scattered flash flooding and
damaging wind gusts stretches from the Intermountain West to the
Mid-Mississippi Valley…

…Dangerous heat builds across the Southern Plains and Gulf Coast this
week…

…Critical Fire Weather and poor air quality remains throughout parts of
the Great Basin and Northwest…

An active August weather pattern is expected to continue through at least
midweek thanks in part to a stationary boundary stretching from the
Southeast to the central Plains and an upper-level trough moving from the
West Coast to the northern Rockies. Organized complexes of showers and
thunderstorms are forecast to ride along and just north of the stationary
front today from eastern Colorado to the Ozarks, with the main weather
hazard associated with intense rainfall rates and scattered flash
flooding. The heavy rainfall threat is then forecast to slide eastward
each day this week, centered over the Mid-Mississippi Valley on Tuesday
and Midwest by Wednesday. These areas coincide with a Slight Risk (level
2/4) of Excessive Rainfall. Additionally, some of the stronger storms will
have the potential to produce isolated hail and the potential for
localized damaging wind gusts. Thunderstorms will also develop throughout
parts of the Southwest, Intermountain West, and Rockies through Tuesday,
producing an isolated flash flood threat for these regions as well.

For the Southeast, the lingering frontal boundary will produce another few
days with scattered thunderstorm chances overlapping with saturated ground
conditions, particularly over the eastern Carolinas. Urban corridors and
locations with poor drainage (even more degraded than usual due to recent
heavy rain and flooding associated with T.S. Debby) will be most at risk.
Residents and visitors are advised to have multiple ways of receiving
warnings and never drive into flooded roadways.

While most of the country enjoys a break from the oppressive summer heat,
much of the southern Plains and Gulf Coast States will experience a
warming trend back to uncomfortable conditions this week. Widespread highs
into the upper 90s are forecast to stretch from the southern High Plains
to the Florida Panhandle, with triple digits possible over portions of the
Lone Star State. When combined with elevated humidity levels, heat indices
may reach up to around the 110 degree mark. Overnight temperatures will
not offer much relief as lows only dip into the upper 70s and low 80s.
This level of heat affects anyone without effective cooling and/or
adequate hydration as denoted by Major to Extreme HeatRisk stretching from
Oklahoma and Texas to the Gulf Coast and much of Florida by Wednesday.

Gusty winds combined with dry terrain are forecast to create Critical Fire
Weather across parts of northwest Nevada today. Meanwhile, ongoing
wildfires will also continue to pump additional smoke into the atmosphere
and produce poor air quality for much of the region.

To get your local forecast plus active alerts and warnings click HERE and enter your city, state or zip code.

Learn about wave patterns HERE.

Then, looking at the world and of course, the U.S. shows here also. Today we are looking at precipitation.

Please click on “Read More” below to access the full Daily Report issued today.

This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks and a six-day World weather outlook which can be very useful for travelers.

First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Sun Aug 11 2024
Valid 12Z Sun Aug 11 2024 – 12Z Tue Aug 13 2024

…Scattered thunderstorms capable of containing locally heavy rainfall
are forecast across much of the Southwest, Intermountain West, and
Plains…

…Lingering flash flood potential exists across the coastal Carolinas
over the next few days…

…Sultry summer heat returns to much of the Southern Plains and central
Gulf Coast States this week…

The weather pattern through early this week will feature daily chances for
thunderstorms from the Southwest and Intermountain West into the Plains,
as well as Florida and coastal sections of the Southeast. An upper level
low in southeast Canada will also provide scattered precipitation chances
to the Great Lakes and Northeast. Anomalous atmospheric moisture content
throughout the Southwest and Great Basin when combined with shortwaves
riding overtop of an upper ridge set up over the region will provide
enough coverage of thunderstorms to support the potential for scattered
flash flooding today from northwest Arizona to central Utah. Complex
terrain and the sensitive slot canyon region of Utah increase the threat
for flooding impacts. Additional chances for heavy rain extend to the
southern California ranges and the remainder of the Southwest and Four
Corners region over the next few days. Meanwhile, northwest flow aloft and
nearby frontal boundaries will help aid thunderstorm development across
the Great Plains. A few rounds of organized convection north of a warm
front forecast to stretch from Oklahoma to the lower Mississippi Valley
could lead to instances of flash flooding through tonight across parts of
eastern Oklahoma, southeast Kansas, southwest Missouri, and northwest
Arkansas. Localized downpours associated with thunderstorm activity are
also possible throughout the remainder of the central and northern Plains
today, with isolated severe storms a possibility for the central High
Plains into the Black Hills region. This unsettled weather pattern is
anticipated to remain in place early this week across the central United
States.

A lingering frontal boundary draped across the Southeast will provide a
focus for additional thunderstorm activity over the next few days,
overlapping with saturated ground conditions from last week’s widespread
heavy rainfall. As a result, localized downpours could result in
additional flash flooding throughout the coastal Carolinas. Residents and
visitors are reminded to avoid driving through flooded roadways and to not
swim or play in floodwater.

For much of the Nation, summer heat will be on hold to start the week as a
cooler weather pattern takes shape compared to previous weeks. However,
building heat will be felt throughout the southern Plains and Deep South
as highs soar back into the upper 90s and triple digits by Monday. When
combined with elevated humidity levels, afternoons will feel closer to
heat index values of 110 degrees in the lower Mississippi Valley and
immediate Gulf Coast. It is also worth noting that overnight temperatures
will not offer much relief as lows only dip into the upper 70s and low
80s. This level of heat could affect anyone without effective cooling
and/or hydration, so it is important to follow proper heat safety tips and
check on vulnerable individuals.

Elsewhere, poor air quality due to ongoing wildfires throughout the
northern Great Basin is expected to continue. Upper level winds are
forecast to carry smoke eastward over parts of the Midwest, Ohio Valley,
and Mid-Atlantic, leading to hazy skies for some locations.

To get your local forecast plus active alerts and warnings click HERE and enter your city, state or zip code.

Learn about wave patterns HERE.

Then, looking at the world and of course, the U.S. shows here also. Today we are looking at precipitation.

Please click on “Read More” below to access the full Daily Report issued today.

This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks and a six-day World weather outlook which can be very useful for travelers.

First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Sat Aug 10 2024
Valid 12Z Sat Aug 10 2024 – 12Z Mon Aug 12 2024

…Unsettled weather extends from the Southwest to the central U.S. over
the next few days, with chances for scattered flash flooding and severe
thunderstorms…

…Lingering heavy rain potential exists across the eastern Carolinas this
weekend…

…Above average temperatures continue across the West today before
confining to the southern Plains and Gulf Coast by early next week…

The upper level pattern and anomalous atmospheric moisture content in
place across the Southwest and Plains will remain conducive for more
active weather through this weekend. Starting with the Southwest, Four
Corners, and southern/central Rockies, the main threat associated with
developing thunderstorms will be related to intense rainfall rates and
flash flooding. Uncertainty remains on where exactly the heaviest rainfall
will occur, but sensitive terrain and burn scars are most likely to see
impacts. This flash flooding threat also extends westward to the southern
California ranges through Sunday, where slow-moving thunderstorms over
complex terrain could lead to isolated flash flooding concerns. Shifting
to the central and southern Plains, convection is expected to become more
organized as a lingering frontal boundary provides a focus for heavy
rainfall potential from Oklahoma to southern Missouri. After an initial
round of storms over central Oklahoma tonight, another round of possibly
slow-moving convection is expected Sunday night from southeast KS and
northeast OK to the western Ozarks. Several inches of rainfall are
possible within a short period of time, which could lead to scattered
instances of flash flooding. Scattered thunderstorms are also forecast to
extend throughout much of the central and northern Plains, but quick
forward motions and lesser coverage should keep the flash flooding threat
localized. In addition to heavy rainfall, these storms could contain
isolated hail and damaging wind gusts.

After recently getting doused by T.S. Debby with several days of tropical
downpours, the eastern Carolinas may see additional bouts of heavy
rainfall over the next few days as sufficient atmospheric moisture content
remain in place along a stalled frontal boundary. This stationary front
combined with diurnal sea breeze activity could spark numerous slow-moving
thunderstorms capable of containing intense rainfall rates. Given most
soils remain overly saturated across the Carolinas, the flash flooding
threat will remain slightly elevated. Residents and visitors are advised
to have multiple ways of receiving warnings and never drive through
flooded roadways.

Temperatures throughout the Lower 48 into the beginning of next week will
feature widespread below average highs from the Plains to the Northeast
underneath broad high pressure, with forecast high temperatures in the 70s
and low 80s. Summer heat will remain confined to the Southern Tier,
including the Southwest today before a cooling trend commences. Meanwhile,
oppressive heat and humidity will continue and rebuild across the southern
Plains and Gulf Coast by Sunday and Monday as highs soar into the upper
90s and triple digits. This equates to around 10 degrees above the
climatological mean for mid-August, but forecast highs at the moment don’t
appear to threaten any daily records.

Elsewhere, continued dry conditions and ongoing wildfires will continue to
produce elevated fire weather conditions and poor air quality across parts
of the Northwest and northern Great Basin. Little changes in the overall
weather pattern should maintain this environment.

To get your local forecast plus active alerts and warnings click HERE and enter your city, state or zip code.

Learn about wave patterns HERE.

Then, looking at the world and of course, the U.S. shows here also. Today we are looking at precipitation.

Please click on “Read More” below to access the full Daily Report issued today.

This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks and a six-day World weather outlook which can be very useful for travelers.

First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Fri Aug 09 2024
Valid 12Z Fri Aug 09 2024 – 12Z Sun Aug 11 2024

…Dangerous flooding and severe weather continue as Debby accelerates
through the Mid-Atlantic and Northeast today…

…Below average temperatures persist across the Northern to Central
Plains, Upper to Mid Mississippi Valley…

…Above average temperatures continue across the West into the South, but
with less record highs compared to previous days…

…Elevated fire weather conditions and poor air quality continue across
Great Basin…

After a slow trek through the Carolinas over the last 24 hours, Debby is
simultaneously weakening and accelerating northeastward along the spine of
the Blue Ridge. Unfortunately, even in Debby’s weakened state, dangerous
flash flooding and severe weather will continue through tomorrow across
portions of the Carolinas, Mid-Atlantic, Interior Northeast, and New
England. Across the Carolinas, additional heavy rainfall is expected to
batter the region today, which will exacerbate ongoing catastrophic and
considerable flash flooding as storm total rainfall approaches 15-25
inches in spots. Closer to Debby’s immediate track, 3 to 7 inches of
rainfall across the Mid-Atlantic and Northeast states will produce
considerable to locally catastrophic flooding impacts through tomorrow
morning. The same cells responsible for this dangerous and prolific
rainfall are also capable of producing a few tornadoes. In the short term
this morning, a few tornadoes remain possible across portions of the
Mid-Atlantic (North Carolina, Virginia, and Maryland), although the risk
will shift into the Northeast (New Jersey, eastern Pennsylvania, and
southeast New York) later today.

The northeast acceleration of Debby is in response to the large scale
closed low associated with a strong cold front stretching from the Great
Lakes, southwestward through the Plains. Below average temperatures in
the wake of this strong front already encompass the Northern to Central
Plains, Upper to Middle Mississippi Valley and Great Lakes, which will
plunge southward into portions of the Southern Plains, Ohio Valley, and
Tennessee Valley today and tomorrow. The forecast remains on track for a
few record low maximum temperatures today across portions of the Central
Plains into the Middle Mississippi Valley and over northern Minnesota with
forecast high temperatures nearly 20-25 degrees below normal.

In contrast, above average temperatures will continue over the next few
days across much of the West into Texas, the South, and Gulf Coast as the
front stalls out to the north. A few record highs still possible across
portions of the central to eastern Gulf Coast over the next few days,
although the number of overall record highs across the country continue to
decrease from previous days. Even with less record high potential, the
current heat has led to a swath of Heat Advisories across portions of
southeast Texas and eastward along the Gulf coast.

In addition to the heat across portions of the Northwest and West, the dry
conditions, low relative humidities and gusty winds will maintain a fire
weather threat tomorrow over northern Nevada and southern Idaho. Smoke
from current fires will also continue to produce poor air quality across
the Pacific Northwest in general.

To get your local forecast plus active alerts and warnings click HERE and enter your city, state or zip code.

Learn about wave patterns HERE.

Then, looking at the world and of course, the U.S. shows here also. Today we are looking at precipitation.

Please click on “Read More” below to access the full Daily Report issued today.

This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks and a six-day World weather outlook which can be very useful for travelers.

First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Thu Aug 08 2024
Valid 12Z Thu Aug 08 2024 - 12Z Sat Aug 10 2024

...Debby is forecast to spread excessive rainfall, strong winds and
thunderstorms up through much of the Mid-Atlantic/Central Appalachians and
Northeast through Saturday morning...

...Excessive Heat concerns continue across the Deep South while cooler air
settles over the Central U.S. through the end of the week...

...Monsoonal storms persist over parts of the Southwest, Four Corners and
High Plains...

Tropical Storm Debby is likely to weaken as it moves from the South
Carolina coast and into the Carolina Piedmont tonight before weakening
into a Tropical Depression sometime on Friday while it moves up into the
Central Appalachians of Virginia, Maryland and Pennsylvania. Debby is
expected to produce an additional 4 to 8 inches of rainfall with locally
higher amounts, across portions of southeastern North Carolina leading to
maximum storm total amounts as high as 15 inches. There's a High Risk (at
least 70%) of Excessive Rainfall leading to Flash Flooding from coastal
North Carolina, into the Piedmont and up through the Blue
Ridge/Appalachians of Virginia. Considerable flooding is expected across
portions of eastern South Carolina and southeast North Carolina through
Friday.

From central North Carolina northward across portions of Virginia, 3 to 7
inches with local amounts to 10 inches, are expected through Friday. This
rainfall will likely result in areas of considerable flash and urban
flooding, with river flooding possible. From portions of Maryland north
through Upstate New York and Vermont, 2 to 4 inches, with local amounts to
6 inches, are expected through Friday night. This will likely result in
areas of considerable flash and urban flooding as well as river flooding.
There's a Moderate Risk (at least 40%) of Excessive Rainfall over portions
of north-central Virginia up through central Pennsylvania/New York for
Friday as Debby moves up the spine of the Appalachians. Things rain, wind
and thunderstorms should come to an end on Saturday when Debby gets swept
up into a powerful upper low propagating across southern Canada.

Elsewhere, a strong cold front associated with the potent upper low in
Canada will drag an anomalously cool airmass down into the mid-section of
the country. High temperatures in the 60s and 70s across the
Northern/Central Plains and Upper/Middle Mississippi Valley will represent
a 15-25 degree negative anomaly for those areas, where some records may be
tied or broken. Strong southerly flow beneath a building mid-level ridge
will support the continuation of a heat wave from Texas into the central
Gulf Coast. Heat Advisories and isolated Excessive Heat Warnings are in
effect for those areas. Conditions should improve a bit this weekend
before worsening again next week.

Monsoonal storms will continue over much of the Southwest, Four Corners
and High Plains over the next few days. Diurnal convection along a stalled
out surface front will promote intense afternoon/evening storms capable of
producing heavy rainfall. A pair of Slight Risks (at least 15%) of
Excessive Rainfall (one today and one on Friday) are in effect across
portions of the Sangre De Cristo Mountains. Wildfires in the Northwest
will contribute to poor air quality over much of Oregon and western
Washington State. Heat Advisories are also in effect for western
Washington.

To get your local forecast plus active alerts and warnings click HERE and enter your city, state or zip code.

Learn about wave patterns HERE.

Then, looking at the world and of course, the U.S. shows here also. Today we are looking at precipitation.

Please click on “Read More” below to access the full Daily Report issued today.

This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks and a six-day World weather outlook which can be very useful for travelers.

First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
348 PM EDT Wed Aug 07 2024
Thu Aug 08 2024 – 00Z Sat Aug 10 2024

…Debby to move slowly inland through northeast South Carolina into
western North Carolina Wednesday night-Thursday, then more rapidly
northeastward Friday-Saturday from the Central Appalachians into Northern
New England…

…Heavy rains, flash and river flooding likely along and to the north and
northeast of Debby, while isolated tornadoes possible to the east of the
track…

…Much above average temperatures to persist next two days across much of
the West into the Southern Plains and South, while below average
temperatures spread across the Northern and Central Plains and Upper
Mississippi Valley…

…Record heat coming to and end from the Southwest into the South by the
end of the week…

…Fire weather threat and poor air quality continue from the Pacific
Northwest into the Northern Rockies and Great Basin…

Debby will make its second U.S. landfall Wednesday evening along the South
Carolina coast and push slowly northwestward through northeast South
Carolina Wednesday night into Thursday, across western North Carolina
during Thursday and then accelerate to the northeast from the Central
Appalachians into Northern New England Friday into Saturday. Sustained
winds with Debby will be lessening as the storm pushes inland and weakens,
with heavy rains, flash flooding and river flooding being the primary
threat as the system pushes northwestward and then more to the north and
northeast over the next few days. The continued slow motions of Debby
through Thursday will produce rainfall totals in the 4-8 inch range, with
locally heavier amounts, across northeast South Carolina, southeast to
central North Carolina into western Virginia, eastern West Virginia and
far western Maryland. Flood watches are currently in effect across these
areas, affecting approximately 19 million people. As the storm begins to
accelerate to the northeast on Friday through the northern Mid-Atlantic,
northern NY State and northern New England, expected precipitation amounts
will likely be less than when the storm is slower moving. Still, rainfall
totals of 2-4″ likely across central to eastern Pennsylvania, central to
northern NY State into northern New England, continuing the threat of
flash and river flooding across these areas.

No let up to the much above average temperatures over the next two days
across much of the West into the Southern Plains and South, with record
high potential Thursday across portions of Texas and the northeast Gulf
Coast from southeast Louisiana into North Florida and again on Friday from
southeast Louisiana into the Florida Panhandle. While temperatures are
still above average from the West into the South over the next few days,
it does appear that record high potential will be coming to an end by the
weekend, Heat advisories are currently in effect across the Southern
Plains into the South, affecting nearly 44 million people.

In contrast to the much above average temperatures and record heat across
the South, much cooler air will continue to sink southward in the wake of
a strong front currently stretching from the Upper Mississippi Valley into
the Northern Plains. This strong front will push much below average
temperatures southward into the Central Plains and Upper to Mid
Mississippi Valley over the next two days. There is even potential for a
few record cold maximum temperatures on Thursday and Friday from southeast
Wyoming into southwest to southern Nebraska and across northern Minnesota.

No let up to the fire weather risk and poor air quality from ongoing fires
for the Pacific Northwest into the Northern Rockies and Great Basin.
These regions will continue to see dry conditions with low relative
humidities and gusty winds, supporting the threat for additional wildfires
and exacerbating efforts to control ongoing fires. Red Flag warnings and
air quality alerts are in effect across portions of Washington State,
Oregon, Idaho, Wyoming, Colorado, Nevada, Utah and Arizona.

To get your local forecast plus active alerts and warnings click HERE and enter your city, state or zip code.

Learn about wave patterns HERE.

Then, looking at the world and of course, the U.S. shows here also. Today we are looking at precipitation.

Please click on “Read More” below to access the full Daily Report issued today.

This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks and a six-day World weather outlook which can be very useful for travelers.

First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Tue Aug 06 2024
Valid 12Z Tue Aug 06 2024 – 12Z Thu Aug 08 2024

…Tropical Storm Debby is expected to cause potentially catastrophic
Flash and Urban Flooding, life-threatening storm surge, and strong winds
across portions of north Florida and the Southeast…

…There’s potential for Excessive Rainfall and Severe Thunderstorms
across portions of the Northern High Plains, Midwest, Lower Great Lakes,
Northeast and Mid-Atlantic today…

…There are Excessive Heat Warnings over parts of Central/Southeastern
California and the Southwest; Heat Advisories over parts of the Lower
Mississippi Valley…

Tropical Storm Debby is expected to track up along the Southeast Coast
over the next couple of days. Potentially historic heavy rainfall across
southeast Georgia and eastern South Carolina through Friday will likely
result in areas of catastrophic flooding. Heavy rainfall will likely
result in considerable flooding impacts from northern North Carolina
through portions of the Mid-Atlantic and southern New England through
Sunday morning. Debby is expected to produce potentially historic rainfall
totals of 10-20 inches, with maximum amounts of 25 inches. A High Risk (at
least 70%) of Excessive Rainfall leading to Flash Flooding is in effect
for parts of southeastern Georgia through eastern South Carolina and into
far southeastern North Carolina today. On Wednesday, another High Risk
will encircle portions of South Carolinas central coast up into
southeastern North Carolina. For more information go to hurricanes.gov.

A cold front will stall out over the Northeast and act as a focus for
thunderstorm activity from the Ohio Valley through the northern
Mid-Atlantic and into parts of the Tri-State area today. Tropical moisture
from Debby will interact with the stationary front in the Northeast and
likely generate heavy rainfall over parts of eastern Pennsylvania,
northern Maryland, New Jersey, and the NYC metro area. A Moderate Risk (at
least 40%) of Excessive Rainfall leading to Flash Flooding is in effect
for the aforementioned areas. The Storm Prediction Center issued a Slight
Risk (level 2/5) of Severe Thunderstorms for portions of northern Ohio,
Pennsylvania and western/northern New Jersey, where damaging wind gusts
and hail are possible. A Slight Risk (at least 15%) of Excessive Rainfall
is also in effect for parts of southern New Jersey, northeastern Maryland
and northern Delaware, where lingering showers may produce isolated flash
flooding Wednesday morning before the stationary front turns cold and
moves offshore.

Elsewhere, mid-level energy propagating over the Northern High Plains will
support thunderstorm activity today. The Storm Prediction Center issued a
Slight Risk of Severe Thunderstorms capable of producing large hail and
strong to severe wind outflow gusts with this activity. Isolated instances
of Flash Flooding are also possible from these storms. Surface high
pressure will penetrate the Northern/Central Plains over the coming days,
and usher in a cooler airmass with high temperatures in the 60s and 70s,
representing a 15-25 degree departure from normal. Warm air will remain
locked in over much of the southern tier states with a heat wave
developing over the Lower Mississippi Valley through the end of the week.

Monsoonal storms are forecast to continue across parts of the Southwest
and Four Corners this week. Shortwave energy will promote excessive
rainfall across southern Arizona today. A Slight Risk of Flash Flooding is
in effect for far southern Arizona as a result. Upper-level ridging across
much of the Southwestern United States will continue to generate Excessive
Heat, particularly across portions of central and southern California,
into the Desert Southwest and the Intermountain West where Excessive Heat
Warnings and Heat Advisories are in effect.

To get your local forecast plus active alerts and warnings click HERE and enter your city, state or zip code.

Learn about wave patterns HERE.

Then, looking at the world and of course, the U.S. shows here also. Today we are looking at precipitation.

Please click on “Read More” below to access the full Daily Report issued today.