US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
138 PM EST Tue Nov 19 2019
 
Valid Friday November 22 2019 - Tuesday November 26 2019
 
Hazards:
- Heavy rain across portions of the Central Plains, the Lower Mississippi Valley, the Pacific 
Northwest, the Northern Great Basin, the Middle Mississippi Valley, the Southern Plains, and the 
Ohio Valley, Tue, Nov 26.
- Heavy rain across portions of the Lower Mississippi Valley, the Tennessee Valley, the 
Mid-Atlantic, the Southern Appalachians, the Southeast, and the Ohio Valley, Fri-Sat, Nov 22-Nov 23.
- Flooding occurring or imminent across portions of the Northern Plains.
- Heavy precipitation across portions of the Alaska Panhandle, Fri, Nov 22.
 
Detailed Summary:

In Alaska, a series of impulses and protracted lower level onshore flow of Pacific moisture will 
bring lingering rounds of heavy rains/mountain snows into especially the higher terrain of the 
Southeast Panhandle Friday into Saturday.

Over the lower 48 states, an amplified southern stream mid-upper level trough will meanwhile eject 
from the southern Plains Friday to the Southeast this weekend. This will support lead frontal wave 
development and a deep layered influx of moisture inland from the Gulf of Mexico to fuel a threat 
of heavy rain/convection from the lower Mississippi/Tennessee Valleys through the Southern 
Appalachians and south-central Mid-Atlantic.

Later, the passage of multiple impulse/jet energies in fast flow into the Pacific Northwest with 
deepened moisture early to mid next week suggests an emerging threat of some heavy coastal 
rains/elevation snows as enhanced with less certain surface low/frontal development. Downstream 
low/trough strengthening over the south-central U.S. meanwhile seems supportive of deep lead Gulf 
of Mexico moisture return to fuel a risk of heavy rainfall/convection set to focus from the 
southern Plains to the mid-lower Mississippi Valley.

Schichtel