US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
239 PM EST Mon Nov 30 2020
 
Valid Thursday December 03 2020 - Monday December 07 2020
 
Hazards:
- Heavy precipitation across portions of the Alaska Panhandle and mainland Alaska, Sun-Mon, Dec 
6-Dec 7.
- High winds across portions of the Alaska Panhandle and mainland Alaska, Sun-Mon, Dec 6-Dec 7.
 
Detailed Summary:

A very quiet medium range period (Thursday, Dec 3rd - Monday, Dec 7th) is in store for the CONUS. 
Deep upper-level troughing over the Plains and ridging in the West will allow anomalously cold air 
to filter down the lee of the Rockies and into the Southern Plains on Thursday. High temperatures 
are likely to be in the 30s and 40s over that region on Thursday. This will be a 20-25 degree 
departure from normal for much of New Mexico and into southwest Texas. A much below normal 
temperature area was not issued for this region since this cold air is not expected to be 
hazardous. Cold air will shift south and east on Friday as the Northern Plains warm up ahead of a 
cold front passage on Saturday. A low pressure system over the Gulf of Mexico will track up the 
East Coast on Saturday. It will produce some rain and snow for parts of the Northeast and 
Mid-Atlantic between Saturday and Monday as a result. Some precipitation may be heavy at times, but 
model guidance doesn't suggest a strong enough system to support hazardous amounts at this time. 
Quiet will return to most of the CONUS at the end of the period, next Monday.

In Alaska, a deep area of low pressure will generate hazardous winds and precipitation for much of 
the southeastern coast next Sunday and Monday. The low pressure system will move south of the 
Aleutians next Sunday before arriving along the southern coast/Gulf of Alaska on Monday. Pacific 
moisture will overspread a surface boundary and produce heavy precipitation beginning Sunday and 
continuing into Monday. As the surface low approaches, the pressure gradient will tighten and high 
winds will impact the southeast Alaskan coast on Sunday and Monday as a result.

Kebede