Atmospheric Rivers

Updated at 1:15 p.m. EDT Sunday, July 23, 2023

Here is what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term outlooks and a five-day
World weather outlook.

We start with the U.S. Information. You can update this section here but these are 48 to 72-hour forecasts so if I have not been able to update this area twice daily, what is shown is still valid and the images in the body of the article update automatically but sometimes they are a bit slow to update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Sun Jul 23 2023

Valid 12Z Sun Jul 23 2023 – 12Z Tue Jul 25 2023

…Excessive Heat Warnings and Advisories from parts of California, the
Northern Intermountain Region, Southwest, and the Great Basin; a second
area in Florida and the Western Gulf Coast…

…There are Air Quality Alerts over parts of the Upper Mississippi
Valley…

Updated at 5:10 p.m.  EDT Thursday, July 20, 2023. Sorry for the delay but remember this is a 48 to 72 hour forecast which usually changes slowly.

Here is what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term outlooks and a five-day
World weather outlook.

We start with the U.S. Information. You can update this section here but these are 48 to 72-hour forecasts so if I have not been able to update this area twice daily, what is shown is still valid and the images in the body of the article update automatically but sometimes they are a bit slow to update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
145 PM EDT Thu Jul 20 2023

Valid 00Z Fri Jul 21 2023 – 00Z Sun Jul 23 2023

…The highest risk of flash flooding/severe storms should persist into
Thursday night in and near the Colorado/Kansas Border…

…Lengthy & dangerous heat wave to continue across the Southern Tier & in
the West…

…Cooler and more comfortable air-mass to engulf the Great Plains and
Midwest…

Here is what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term outlooks and a five-day
World weather outlook.

We start with the U.S. Information. You can update this section here but these are 48 to 72-hour forecasts so if I have not been able to update this area twice daily, what is shown is still valid and the images in the body of the article update automatically but sometimes they are a bit slow to update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
421 PM EDT Sun Jul 16 2023

Valid 00Z Mon Jul 17 2023 – 00Z Wed Jul 19 2023

…There is a Moderate Risk of excessive rainfall over parts of New
England on Sunday…

…There is a Slight Risk of severe thunderstorms over parts of New
England and Central Plains/Middle Mississippi Valley…

…Excessive Heat Warnings and Advisories from the Pacific Northwest,
California, and the Great Basin to parts of the Southern Plains, Central
Gulf Coast, and southern tip of Florida…

…Air Quality alerts over parts of the Northern High Plains, Upper
Midwest, and Ohio Valley…

Here is what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term outlooks and a five-day
World weather outlook.

We start with the U.S. Information. You can update this section here but these are 48 to 72-hour forecasts so if I have not been able to update this area twice daily, what is shown is still valid and the images in the body of the article update automatically but sometimes they are a bit slow to update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
421 PM EDT Sun Jul 16 2023

Valid 00Z Mon Jul 17 2023 – 00Z Wed Jul 19 2023

…There is a Moderate Risk of excessive rainfall over parts of New
England on Sunday…

…There is a Slight Risk of severe thunderstorms over parts of New
England and Central Plains/Middle Mississippi Valley…

…Excessive Heat Warnings and Advisories from the Pacific Northwest,
California, and the Great Basin to parts of the Southern Plains, Central
Gulf Coast, and southern tip of Florida…

…Air Quality alerts over parts of the Northern High Plains, Upper
Midwest, and Ohio Valley…

Here is what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term outlooks and a five-day
World weather outlook.

We start with the U.S. Information. You can update this section here but these are 48 to 72-hour forecasts so if I have not been able to update this area twice daily, what is shown is still valid and the images in the body of the article update automatically but sometimes they are a bit slow to update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Sat Jul 15 2023

Valid 12Z Sat Jul 15 2023 – 12Z Mon Jul 17 2023

…Dangerous heat wave to remain anchored over the West this weekend;
growing hotter in the South by early next week…

…Excessive Rainfall and severe weather to transpire across the eastern
half of the Lower 48…

…Canadian wildfire smoke is responsible for Air Quality alerts in parts
of the North Central U.S. and Ohio Valley…

Here is what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term outlooks and a five-day
World weather outlook.

We start with the U.S. Information. You can update this section here but these are 48 to 72-hour forecasts so if I have not been able to update this area twice daily, what is shown is still valid and the images in the body of the article update automatically but sometimes they are a bit slow to update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Fri Jul 14 2023

Valid 12Z Fri Jul 14 2023 - 12Z Sun Jul 16 2023

...Dangerous heat wave to stretch from the West Coast to the Gulf Coast;
at least 93 million people are under Excessive Heat Warnings and Heat
Advisories as of this morning....

...Friday features an expansive threat for Excessive Rainfall, highlighted
by a Moderate Risk for portions of the Northeast; severe weather likely in
the Central Plains...

...Saturday remains active with numerous heavy showers & storms in the
East; Slight Risk for Excessive Rainfall in the southern High Plains...

Here is what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term outlooks and a five-day
World weather outlook.

We start with the U.S. Information. You can update this section here but these are 48 to 72-hour forecasts so if I have not been able to update this area twice daily, what is shown is still valid and the images in the body of the article update automatically but sometimes they are a bit slow to update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
400 PM EDT Thu Jul 13 2023

Valid 00Z Fri Jul 14 2023 – 00Z Sun Jul 16 2023

…A couple rounds of heavy rain could trigger additional flash flooding
over interior New England through tonight…

…Additional rounds of severe weather and flash flooding persist across
the central Plains, mid-Mississippi Valley and into the eastern Gulf Coast
over the next couple days…

…Significant heat wave continues to expand across much of the western
and southern tier of the U.S….

Here is what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term outlooks and a five-day
World weather outlook.

We start with the U.S. Information. You can update this section here but these are 48 to 72-hour forecasts so if I have not been able to update this area twice daily, what is shown is still valid and the images in the body of the article update automatically but sometimes they are a bit slow to update.

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
410 PM EDT Wed Jul 12 2023

Valid 00Z Thu Jul 13 2023 – 00Z Sat Jul 15 2023

…Additional rounds of severe weather and flash flooding persist across
the Mississippi Valley, Midwest, and Plains over the next couple days…

…Heavy rain potential returns to the Northeast Thursday…

…Building heat wave continues to expand across much of the western and
southern tier of the U.S….