US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
303 PM EST Mon Feb 03 2020
 
Valid Thursday February 06 2020 - Monday February 10 2020
 
Hazards:
- Heavy precipitation across portions of the Pacific Northwest and the Northern Great Basin, 
Thu-Fri, Feb 6-Feb 7.
- Heavy rain across portions of the Northeast, the Central Appalachians, the Tennessee Valley, the 
Mid-Atlantic, the Southern Appalachians, and the Southeast, Thu-Fri, Feb 6-Feb 7.
- Heavy snow across portions of the Central Plains, the Northeast, the Central Great Basin, the 
Northern Plains, the Northern Rockies, the Central Rockies, the Northern Great Basin, and the Great 
Lakes, Thu-Sat, Feb 6-Feb 8.
- Severe weather across portions of the Southeast and the Southern Mid-Atlantic, Thu, Feb 6.
- Flooding possible across portions of the Northeast, the Central Appalachians, the Northern Great 
Basin, the Mid-Atlantic, the Southern Appalachians, the Southeast, and the Pacific Northwest.
- Flooding occurring or imminent across portions of the Lower Mississippi Valley, the Pacific 
Northwest, and the Northern Plains.
- Flooding likely across portions of the Southeast and the Mid-Atlantic.
- High winds across portions of mainland Alaska and the Aleutians, Fri-Mon, Feb 7-Feb 10.
- Much below normal temperatures across portions of mainland Alaska, Thu-Sat, Feb 6-Feb 8.
 
Detailed Summary:

The medium range period hazards from Thursday 06 February to Monday 10 February 2020 has a front 
over the eastern third of the country that will move off the East Coast by Friday.  An unstable 
warm moist air mass ahead of the front will lead to showers and thunderstorms that may become 
severe over the Southeast/Southern Mid-Atlantic on Friday.  Heavy rain will also develop along the 
front from the southeast northeastward to the Northern Mid-Atlantic into Southern New England on 
Friday.  The storm in the cold air will produce heavy snow across parts of the Lower Great Lakes 
into Northern New England on Thursday into Saturday.  The storm and associated front will move off 
the East Coast on Friday. 

A wave of low pressure along a front extending across the Northern Inter Mountain Region into the 
Central Plains will aid in producing heavy snow over parts of the Northern Intermountain 
Region/Northern Rockies into the Central Rockies on Thursday into Friday.  In addition, onshore 
flow off the Pacific will aid in producing mountain snow and valley rain over the Pacific Northwest 
on Thursday into Friday where heavy precipitations is depicted.    

Over Alaska, deep low pressure over the Northern Pacific will move eastward to the the Bering Sea 
on Friday into Saturday and dissipating.  Another area of deep low pressure will move into the 
Aleutians by Monday.  An area of high wind is depicted on the hazards chart over the Aleutians into 
the Alaska Peninsula from Friday into Monday.  A deep upper-level low over the northern mainland 
will move southeastward to the Bering Strait by Saturday then moves northwestward into Eastern 
Russia.  The upper-level low will aid in bringing temperatures 25 degrees F below normal meeting 
the criteria for much below normal temperatures over the northern mainland and the western coast of 
the mainland on Thursday into Saturday.                                

Ziegenfelder