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 (up to four weeks) 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
Wed Nov 13 2024
Valid 12Z Wed Nov 13 2024 – 12Z Fri Nov 15 2024…Atmospheric River brings heavy coastal rain and high-elevation mountain
snow to the Pacific Northwest and northern California Wednesday……Showers and thunderstorms will bring locally heavy rainfall to the
Lower Ohio, Tennessee, and Mississippi Valleys Wednesday, with the risk
for some scattered flash flooding in Louisiana and Mississippi……Above average temperatures continue for much of the central U.S. and
Gulf Coast states while colder air moves into the Northeast and the West…Heavy lower elevation rain and high elevation mountain snow continues in
the Pacific Northwest this morning as a Pacific frontal system and
associated plume of moisture/Atmospheric River move inland over the
region. Precipitation coverage will expand southward into northern
California through the day Wednesday, with favorable upslope locations
along the coastal ranges and Cascades seeing locally heavy rainfall with
an isolated risk for flooding. Precipitation will also spread inland with
the front into the northern Rockies/Great Basin bringing rain and a wintry
mix to lower elevations and more snow to higher elevations in the local
mountain ranges. Precipiation chances across the region will continue into
Thursday, though with more moderate amounts expected as the moisture
flowing in from the Pacific wanes.Gulf moisture flowing northward ahead of a low pressure/frontal system
over the Mississippi Valley will help trigger a broad area of showers and
thunderstorms today stretching from the Midwest/Great Lakes south through
the Ohio, Tennessee, and Lower Mississippi Valleys. Greater and deeper
moisture content closer to the Gulf as well as some marginal instability
will bring the threat for some locally heavy downpours producing a few
inches of rain for the Lower Ohio, Tennessee, and Lower Mississippi
Valleys, where a Marginal Risk of Excessive Rainfall (level 1/4) is in
effect for some isolated flash flooding. A targeted Slight Risk (level
2/4) has been introduced from central Louisiana northeast into central
Mississippi where higher confidence in greater rainfall rates and very wet
antecedent conditions from prior heavy rainfall events may lead to a few
more scattered instances of flash flooding. The system will continue
eastward on Thursday, bringing shower and thunderstorm chances to the
Upper Ohio Valley, Appalachians, and the Carolinas/Southeast, while
lingering across the Great Lakes. Some more moderate to locally heavy
rainfall totals are most likely across the central/southern Appalachians
and Carolinas where precipitation will be enhanced by a second frontal
boundary lifting northward from the Gulf. The rest of the country will
remain mostly dry.Much of the central U.S. and Gulf Coast states continue to see above
average high temperatures by around 5-15 degrees this week. Forecast highs
Wednesday and Thursday range from the 40s and 50s in the Great
Lakes/Midwest; 50s in the northern Plains; 50s and 60s in the central
Plains, Middle Mississippi Valley, and Ohio Valley; the 70s for Texas and
the Lower Mississippi Valley, and the 80s along the Gulf Coast and into
Florida. Frontal passages and generally unsettled weather along the East
Coast and in the West will keep temperatures cooler and more seasonable in
these areas. Forecast highs range from the 30s and 40s in New England, the
40s and 50s in the Mid-Atlantic, and the 50s and 60s from the Carolinas
south into Georgia. In the West, highs Wednesday are in the 40s and 50s
for the Pacific Northwest and Interior West, the 60s in California, and
the 70s in the Desert Southwest. Temperatures will moderate for eastern
interior areas on Thursday as upper-level ridging builds northward, with
highs climbing into the 50s and 60s for the Rockies and Four Corners
Region, and the 80s for the Desert Southwest.
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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10
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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. |
