US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
154 PM EST Wed Jan 22 2020
 
Valid Saturday January 25 2020 - Wednesday January 29 2020
 
Hazards:
- Heavy precipitation across portions of California and the Pacific Northwest, Sat-Sun, Jan 25-Jan 
26.
- Heavy precipitation across portions of the Pacific Northwest, and the Northern Great Basin, Wed, 
Jan 29.
- Heavy rain across portions of the Mid-Atlantic and the Northeast, Sat-Sun, Jan 25-Jan 26.
- Heavy snow across portions of the Central Great Basin and California, Sun-Mon, Jan 26-Jan 27.
- Heavy snow across portions of the Great Lakes, the Mid-Atlantic, the Northeast, the Central 
Appalachians, and the Ohio Valley, Sat-Mon, Jan 25-Jan 27.
- Flooding occurring or imminent across portions of the Middle Mississippi Valley, the Lower 
Mississippi Valley, the Great Lakes, the Ohio Valley, and the Northern Plains.
- Flooding likely across portions of the Pacific Northwest.
- Much below normal temperatures across portions of mainland Alaska, Sat-Wed, Jan 25-Jan 29.
 
Detailed Summary:

A storm over the Great Lakes/Ohio Valley into the Mid-Atlantic, on Saturday, will move eastward to 
Southern New England by Sunday then moving out over the Western Atlantic by Monday.  The system 
will produce heavy rain and inch or greater over parts of Southern New England into parts of the 
Northern Mid-Atlantic on Saturday into Sunday.  The same system will produce heavy snow over parts 
of the Central/Northern Appalachians into Northern New England on Saturday into Sunday, too. 

Over the Pacific Northwest on Saturday, a front will move onshore moving southeastward to Southern 
California/Great Basin/Southwest by Monday.  The storm will produce heavy precipitation over parts 
of Northern California on Saturday into Sunday.  The same system will produce heavy snow over the 
Sierra Nevada Mountains on Sunday into Monday.  The front will move to the Western Gulf Coast/Lower 
Mississippi Valley by Wednesday.  There is a possibility of producing heavy rain in the area but 
the models are not converged on to a solution we can confidently say will produce the area of heavy 
rain over the Southern Plains or the Lower Mississippi Valley, or even the Tennessee Valley by 
Wednesday.  Also on Wednesday, an other front will be moving off the Pacific.  The system will 
bring moisture to the Pacific Northwest that will produce heavy precipitation over the area.  

In Alaska, much below normal temperatures are likely through much of the period across most of the 
Mainland. Minimum and maximum temperature anomalies could be 20 to 30+ degrees below normal. A 
surface low across the Gulf of Alaska could bring a period of high winds to parts of the central 
coast, and moderate to locally heavy precipitation to the Panhandle region. The magnitude of both 
hazards looks marginal for inclusion of an area on the chart, though the potential exists.

Ziegenfelder