US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
250 PM EST Mon Nov 29 2021
 
Valid Thursday December 02 2021 - Monday December 06 2021
 
Hazards:
- Flooding occurring or imminent across portions of the Pacific Northwest.
- High winds across portions of the Northern Plains and the Northern Rockies, Thu, Dec 2.
- Much below normal temperatures across portions of mainland Alaska, Thu-Fri, Dec 2-Dec 3.
- Much below normal temperatures across portions of mainland Alaska, Fri-Sun, Dec 3-Dec 5.
 
Detailed Summary:

The medium range period (Thursday, December 2nd - Monday, December 6th) will feature mostly quiet 
weather across the Lower 48, with only a few potential weather hazards to discuss. Starting on 
Thursday, a very strong jet stream located along the U.S.-Canada border will aid in producing gusty 
winds across the northern High Plains of Montana. Parts of northwest Montana could experience wind 
gusts up to 70 mph. Meanwhile, a few clipper systems will continue to swing over the Great Lakes 
and Northeast through the weekend. Light snow and blustery conditions will be the main impact from 
these quick-hitting systems. As we approach the beginning of next week, the weather pattern appears 
to turn more amplified across the East. As a result, the potential for heavy rain and wintry 
weather increases on Monday from the Tennessee Valley to New England. Forecast guidance currently 
depicts a large spread in potential outcomes, therefore no hazards were included in today's 
graphic. Elsewhere, the next storm system to drench the Pacific Northwest may arrive towards the 
end of the forecast period (Monday, 12/6). A highlighted hazard area could be added here in the 
next forecast cycle, as long as confidence increases regarding the magnitude of potential 
precipitation. 

In regards to temperatures, widespread above average temperatures are likely to be found across 
much of the Nation before returning back to near average over the eastern half of the country by 
the weekend. Below average and winter-like temps are expected to be confined to New England, where 
lows could dip into the teens and single digits beginning on Saturday. Colder weather should also 
slowly make a comeback across the Northern Plains and Upper Midwest by the weekend, but lows will 
remain close to average for this time of year.

For Alaska, a bitterly cold airmass in place is forecast to linger over the southwest section of 
the state through Friday before shifting into the south-central and eastern mainland this weekend. 
Temperatures are likely to remain 20+ degrees below average for these areas, which equates to 
widespread lows well below zero. Inland sections of Alaska can expect temps as low as -40 degrees. 
This cold outbreak is expected to relax by late Sunday into Monday as a storm system approaches 
from the Bering Sea. Heavy snow and gusty winds associated with this area of low pressure may 
impact parts of southwest and south-central Alaska on Monday.   

Snell