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
400 AM EDT Wed Aug 28 2024
Valid 12Z Wed Aug 28 2024 – 12Z Fri Aug 30 2024…Record heat for the Mid-Atlantic today but the heat will last a couple
more days for the Ohio and Tennessee Valleys into the interior Southeast……Active thunderstorms will bring the threats of heavy rain, flash
flooding and severe weather across the northern Plains tonight and then
the upper Midwest Thursday through early Friday……Strong to severe late afternoon thunderstorms possible across the
east-central U.S for today and Thursday……First snowflakes of the season expected for the high elevations of
northwestern Montana today while fire weather threat blankets portions of
the northern Rockies…A cold front has brought relief to the heat across the northern Plains
while triggering clusters of strong thunderstorms across the Midwest this
morning. As the front continues to push east and southeastward, a day of
record heat is expected to impact the Mid-Atlantic states where high
temperature could reach 100 degrees around the nation’s capital. This
heatwave will be relatively short-lived for the Mid-Atlantic as a much
cooler and damp air mass associated with a Canadian high pressure system
will quickly settle southward across the Great Lakes/New England into the
Mid-Atlantic by Thursday. However, much of the Ohio and Tennessee Valleys
will feel a couple more days of high temperatures topping into the upper
90s at the hottest locations as the next low pressure system marching
across the northern Plains will cease the southward progress of the cool
air and keep the heat in place for these areas. As the cold front
approaches, the hot air will be lifted and help trigger lines of
thunderstorms which can become severe along with locally heavy downpours
and very gusty winds. The highest threat for severe weather will be later
today into this evening from Ohio eastward across the northern
Mid-Atlantic near/after the time of maximum heating in the afternoon.
Some more strong thunderstorms could form Thursday afternoon farther
southward into the Mid-Atlantic on Thursday. Very cool air will then
blanket the entire Northeast on Thursday.Meanwhile, the strong cold front associated with the next low pressure
system is marching across the northern Rockies. Sharply colder air behind
the system will likely bring the first snowflakes of the season for the
high elevations of northwestern Montana today while fire weather threat
blankets portions of the northern Rockies. The strong frontal system will
move steadily across the northern and central Plains on Thursday where the
threat of severe weather will be highest from Wednesday night across North
Dakota, then shifting east across a large chunk of the Midwest and upper
Midwest Thursday to Thursday night.Farther south in Texas, an upper low had moved inland from the Gulf of
Mexico since yesterday. The instability has continued to help trigger
scattered thunderstorms across southern Texas. Meanwhile, deep southerly
flow to the east of the upper low has directed tropical moisture northward
from the Gulf toward the western Gulf Coast region, where some heavy
rainfall could develop in the vicinity during the next couple of days.
Elsewhere, while monsoonal moisture has become not as active and
widespread over the southern Rockies today, more focused activities across
southwestern New Mexico could lead to heavy rainfall. By Thursday, the
trailing cold front across the Plains will likely push the rain farther
east into the southern Plains where strong to severe storms are possible
by later in the day.
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.
| Notices: What would you like to learn about? Please provide that to me via the comment section at the end of the article. |
Now more detail on the 48-Hour Forecast (It is a 48 to 72 Hour Forecast actually)
Daily weather maps. The Day 1 map updates twice a day and the Day 2 and 3 maps update only once a day. These maps update automatically. But if that does not happen, you can get updates by clicking HERE
TODAY (or late in the day the evening/overnight map will appear) (Key to surface fronts shown on maps and you will then also be able to insert a city name or zip code and get a local NWS forecast).
TOMORROW
NEXT DAY
We have a new animation of the forecast which shows how things may play out over the next 60 hours. To update click ANIMATION. Doing so will get you to the dashboard. You can then step through the animation or hit LOOP on the upper right of the display. You will have to hit the back arrow ← at the top left on your computer to get back into this article. It is a little more trouble than before but I think NOAA scrapped the animation routine I was using so we have to keep up with “progress”.
The NWS Climate Prediction Center’s: Watches, Warnings, and Advisories plus other information can be found HERE. That takes you to the NWC Severe Weather Site. From there you can select among many categories of information. Remember to hit the back arrow ← at the top left of your screen to return to this article.
ATMOSPHERIC RIVERS
This tells us what is approaching the West Coast. Click HERE to update If I have not gotten around to doing the update. Here is some useful information about Atmospheric Rivers.
Below is the current five-day cumulative forecast of precipitation (Updates can be found HERE)
Ski SnowReports will Resume in the Fall.
Now we look at Intermediate-Term “Outlook” maps for three time periods. Days 6 – 10, Days 8 – 14, and Weeks 3 and 4. An outlook differs from a forecast based on how NOAA uses these terms in that an “outlook” presents information as deviation from normal and the likelihood of these deviations.
Below are the links to obtain updates and additional information. They are particularly useful if you happen to be reading this article significantly later than when it was published. I always try to provide readers with the source of the information in my articles. These links may also be useful for those viewing this article on a cell phone or other small screen.
| Days 6 – 10 (shown in Row 1) | Days 8 – 14 (Shown in Row 2) | Weeks 3 and 4 (Shown in Row 3 but updates only on Fridays) |
| https://www.cpc.ncep.noaa. gov/products/predictions/610day/ | https://www.cpc.ncep .noaa.gov/products/predictions/814day/ | https://www.cpc.ncep.noaa.gov/products/predictions/WK34/ |
Showing the actual maps. They should now update automatically. The Week 3 – 4 Outlook only updates on Fridays. So below is what I call the Intermediate-term outlook. On Fridays, it extends out 28 Days. That declines day by day so on Thursday it only looks out 22 days until the next day when the Week 3 – 4 Outlook is updated and this extends the outlook by one additional week.
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HAZARDS OUTLOOKS
Click here for the latest complete Day 3 -7 Hazards forecast which updates only on weekdays. Once a week probably Monday or Tuesday I will update the images. I provided the link for readers to get daily updates on weekdays. Use your own judgment to decide if you need to update these images. I update almost all the images Friday Night for the weekend edition of this Weather Report. So normally readers do not need to update these images but if the weather is changing quickly you may want to.
Temperature month to date can be found at https://hprcc.unl.edu/products/maps/acis/MonthTDeptUS.png
Precipitation month to date can be found at https://hprcc.unl.edu/products/maps/acis /MonthPNormUS.png
World Forecast [that website is has been intermittent so be patient]
Below are the Day 1 -3 and 4-6 forecasts for temperature and precipitation. Updates and much additional information can be obtained HERE
World Temperature Anomalies
World Accumulated Precipitation
This information is provided by the University of Maine. They draw upon many different sources. There is a lot of information available at the link provided. I have just provided two useful forecasts. There are probably over a hundred different forecasts available from this source.
Worldwide Tropical Forecast (This is a NOAA Product)
This graphic updates on Tuesdays) If it has not been updated, you can get the update by clicking here Readers will only have to do that if they are reading this article much later than the date of it being published.
Information on Tropical Storms can be found HERE. Western Pacific information can be found HERE. Note that unless there is an out-of-season storm the below images will not update until the National Hurricane Center starts their seasonal update of these maps on June 1. I include them simply because there can be an out-of-season event in which case it should show up in these maps.
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I hope you found this article interesting and useful. –
