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 outlooks and a six-day World weather outlook which can be very useful for travelers.
We start with the U.S. Information. That is the longest part of the article. Then we have a short section on World Weather and then we address the Tropics. When there are tropical storms that might impact the U.S. we provide more detailed information which updates frequently on those storms.
Please click on “Read More” below to access the full report as I have moved the highlights into the body of the report where it is followed by the Today, Tomorrow and the Next Day maps and a lot more. I will try to feature the most important graphic in the lede paragraph on the home page. But there are often multiple maps that are very important so it is best to read the full article. We now have a snow report and it is possible to get a ten-day NWS forecast for the zip code of your choice.
| Notices: We recently published a review of October weather worldwide and you can access that article HERE. And a review of October weather for the U.S. which you can access HERE. We have now published the NOAA Seasonal Update which you can access HERE. What would you like to learn about? Please provide that to me via the comment section at the end of the article. |
First the highlights from the NWS.
Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Fri Dec 01 2023
Valid 12Z Fri Dec 01 2023 – 12Z Sun Dec 03 2023…Multi-day winter storm will impact travel in the Northwest with
significant mountain snow and heavy rain……Unsettled weather forecast across the eastern third of the country with
heavy rain potential along the Gulf Coast and Southeast, while wintry
weather is expected from parts of the Midwest and Great Lakes to northern
New England…
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
This animation shows how things may play out over the next 60 hours. To update click here.
The NWS Climate Prediction Center’s: Watches, Warnings, and Advisories plus other information can be found HERE. We post at least one of those updates daily, sometimes both. The Highlights are shown in the lede paragraph of 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.
Continuation of the NWS Short Range Forecast. It is updated by NWS twice a day and these updates can be found here
Meteorological winter is off to a fast start across much of the Northwest,
Great Basin, and Rockies as plentiful moisture streams inland from the
Pacific Ocean over at least the next few days. The specific region seeing
the most impacts from heavy mountain snow and heavy rain will be the
Pacific Northwest, where a strong atmospheric river is expected to wallop
the region on Sunday after continuous instances of moderate precipitation
today and Saturday. Total rainfall amounts through this weekend are
expected to approach 5 to 10 inches along the coastal ranges of western
Washington and Oregon, with several inches of rain also expected for
places such as Portland, OR and Seattle, WA. Heavy snow likely adding up
to at least a few feet is expected across the Cascades, including many
mountain passes. Travel will be difficult to hazardous due to both heavy
snow and blowing snow. Snow levels are expected to increase by Saturday
night and throughout the day on Sunday, leading to heavy rain on top of
recent snowfall throughout the Cascades. This combination of heavy rain
and snowmelt on Sunday will likely produce minor to moderate river
flooding.Heavy snow potential will also extend into the mountainous terrain of the
Great Basin and Rockies as leftover moisture transport continues to slide
eastward from the Pacific. Heavy snow is likely to reach into several
mountain ranges from Idaho and Montana to Colorado. The highest peaks are
forecast see as much as 1 to 3 feet of snow. Winter Storm Warnings and
Winter Weather Advisories have been issued for areas most likely to see
impactful and/or hazardous snowfall.An increasing southwesterly jet stream over the eastern U.S. will allow
for unsettled and mild weather to overspread the region during the first
weekend of December. An initial system is forecast to progress from the
Midwest to the Great Lakes by Saturday as another developing system right
on its heels enters the Great Lakes on Sunday. Overall, light rain is
expected across the Ohio Valley, Appalachians, Northeast, and
Mid-Atlantic. However, elevated atmospheric moisture content and
instability may lead to locally heavy rainfall and thunderstorms along the
Gulf Coast today. This threat of heavy rainfall then pushes farther north
into the Southeast on Saturday ahead of a central U.S. upper trough.
Farther north, wintry weather is expected on the northern periphery of the
precipitation shield as cold air remains in place due to a stretched out
high pressure system extending into southeast Canada. Mostly light and
localized snowfall is expected from parts of eastern Iowa to the Lower
Peninsula of Michigan through tonight. Heavier snow is possible across
northern New England on Monday, where modest probabilities (40-60%) for
greater than 4 inches of snow exist between northern New Hampshire and
northern Maine.Elsewhere, mostly dry conditions are expected across the central and
southwestern United States. Below average temperatures are also
anticipated to be confined to the central Plains and West through the
beginning of the weekend, with above average temperatures throughout the
remainder of the CONUS.
Learn about wave patterns HERE.
Below is the current five-day cumulative forecast of precipitation (Updates can be found HERE)
Ski SnowReports
New Feature – Ski Reports. It is difficult to find reports that auto-update on-screen (and they are very long) but these links will get you to them – If you have additional suggestions make them in the comments section after every Econcurrents Article and we may add those links. We will try to not have too much overlap as that can add to the confusion.
Snow Forecasts. And remember this shows natural snow. Ski resorts also make their own snow.
Day 1
Day 2
Additional snow information can be found here and here. The second link provides animations.
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.
| 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.
| 6–
10
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| 8–
14 |
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| 3–
4 |
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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
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.
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| I hope you found this article interesting and useful. |
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