US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
318 PM EST Thu Dec 03 2020
 
Valid Sunday December 06 2020 - Thursday December 10 2020
 
Hazards:
- Heavy precipitation across portions of the Pacific Northwest and the Northern Great Basin, Tue, 
Dec 8.
- Heavy snow across portions of the Northeast, Sun, Dec 6.
- Flooding possible across portions of the Mid-Atlantic, the Northeast, and the Central 
Appalachians.
- 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.
- High significant wave heights for coastal portions of the Alaska Panhandle and mainland Alaska, 
Sun-Mon, Dec 6-Dec 7.
 
Detailed Summary:

An area of deep low pressure just northeast of Maine will produce snow over Northern Maine on 
Sunday.  The snow will produce hazardous driving conditions.  Light snow may linger over other 
parts of the Northeast on Sunday into Monday.  Also on Sunday, a front moving across the Gulf Coast 
States will not have a strong source of moisture; therefore, it will produce scattered rain showers 
across the parts of the Central Gulf Coast into the Southeast.  

Meanwhile, a front moving into the Pacific Northwest on Tuesday will have a fair amount of moisture 
to work with, producing an area of rain and higher elevation snow over parts of the Northern 
Cascades.  The snow will produce hazardous driving conditions.   In addition, an area of deep low 
pressure over Southern Canada will have a strong enough pressure gradient to produce strong wind 
over the open waters of the Great Lakes on Wednesday.

An area of deep low pressure over the Gulf of Alaska, on Sunday, will have a direct stream of 
moisture moving into the Gulf of Alaska Coast, producing an area of heavy precipitation, of rain 
and snow, from the east side of the Kenal Peninsula to the Alaska Panhandle.  Also on Sunday, the 
system will produce High Wind and Significant Waves that will impact the Eastern Gulf Coast into 
the Panhandle.  The storm will slowly weaken on Monday, slowly moving into the Alaska Mainland near 
Kenal Peninsula by Tuesday

Ziegenfelder