US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
326 PM EST Wed Nov 25 2020
 
Valid Saturday November 28 2020 - Wednesday December 02 2020
 
Hazards:
- Heavy precipitation across portions of the Northeast, the Central Appalachians, the 
Tennessee/Ohio Valley, the Mid-Atlantic, the Great Lakes, and the Ohio Valley, Mon-Tue, Nov 30-Dec 
1.
- Heavy rain across portions of the Lower Mississippi Valley and the Southern Plains, Sat, Nov 28.
- Heavy rain across portions of the Lower Mississippi Valley, the Tennessee/Ohio Valleys, the 
Mid-Atlantic, the Southern Appalachians, and the Southeast, Sun, Nov 29.
- Heavy rain across portions of the Southeast, the Southern Appalachians, the Mid-Atlantic, and the 
Central Appalachians, Mon, Nov 30.
- Heavy rain across portions of the Mid-Atlantic and the Northeast, Tue, Dec 1.
- Heavy snow across portions of the Great Lakes, Mon, Nov 30.
- Flooding occurring or imminent across portions of the Southeast.
- Heavy precipitation across portions of the Alaska Panhandle and mainland Alaska, Sat-Tue, Nov 
28-Dec 1.
- High winds across portions of the Alaska Panhandle and mainland Alaska, Sat, Nov 28 and Tue, Dec 
1.
- High winds across portions of mainland Alaska and the Aleutians, Sat-Mon, Nov 28-Nov 30.
 
Detailed Summary:

Hazardous weather will impact a swath of land extending from the Gulf coast up to the Northeast 
through most of the medium range period (Saturday, November 28th - Wednesday, December 2nd). 
Coastal Alaska will also experience hazardous weather during the entirety of the medium range. A 
closed upper level-low will enhance southerly flow into the Texas/Central Gulf coast this weekend 
leading to a multi-day heavy rain event. This heavy rain threat will extend from the southern Texas 
coast up into the Lower Mississippi Valley on Saturday. Heavy Rain will spread over the Southeast, 
Southern Appalachians and Tennessee Valley on Sunday. As the upper-level feature tilts and shifts 
eastward on Sunday it will begin to phase with the northern stream system diving in from central 
Canada. This phasing will form a single deep area of low pressure. This will go on to produce heavy 
rain along the eastern seaboard, from northern Florida up through the Mid-Atlantic, on Monday. Cold 
air will filter in on the backside of this closed upper-level low that same day, allowing snow to 
mix in with rain at higher elevations of the Central Appalachians and interior Northeast.

Alaska will see a similarly active medium range period along its southern coastline. A sequence of 
surface low pressure systems will generate high winds along the Aleutians and the southern mainland 
through Monday. These systems will draw a consistent stream of substantial Pacific moisture into 
the southern coast of Alaska. This will lead to a heavy precipitation hazard extending from the 
Kenai Peninsula to Baranof Island, over the panhandle, through Monday. Heavy precipitation will 
continue over Prince of Wales Island and the rest of the southeastern tip of the Alaskan Panhandle 
on Tuesday.

Kebede