US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
342 PM EST Tue Nov 24 2020
 
Valid Friday November 27 2020 - Tuesday December 01 2020
 
Hazards:
- Heavy precipitation across portions of the Northeast, Mon, Nov 30.
- Heavy rain across portions of the Lower Mississippi Valley and the Southern Plains, Fri-Sat, Nov 
27-Nov 28.
- Heavy rain across portions of the Lower Mississippi Valley, the Central/Southern Appalachians, 
the Tennessee/Ohio Valleys, the Mid-Atlantic, and the Southeast, Sun, Nov 29.
- Heavy rain across portions of the Mid-Atlantic and the Northeast, Mon, Nov 30.
- Flooding occurring or imminent across portions of the Southeast.
- Heavy precipitation across portions of the Alaska Panhandle and mainland Alaska, Sat-Mon, Nov 
28-Nov 30.
- Heavy precipitation across portions of the Alaska Panhandle, Tue, Dec 1.
- High winds across portions of mainland Alaska, Fri-Mon, Nov 27-Nov 30.
- High winds across portions of mainland Alaska and the Aleutians, Fri-Tue, Nov 27-Dec 1.
 
Detailed Summary:

Hazardous weather will impact an aerial swath extending from the Gulf coast up to the Northeast 
through most of the medium range period (Friday, November 27th - Tuesday, December 1st). 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/Tennessee Valley and Southeast. 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 Georgia up to southern Maine, on Monday. Cold 
air will filter in behind this system. Snow may mix in with rain at higher elevations of the 
interior Northeast. We may see a transition to a heavy precipitation area over parts of northern 
New England on Monday into Tuesday as the system exits into the Canadian maritime.

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 
eastern 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