US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
607 PM EDT Tue Apr 07 2020
 
Valid Friday April 10 2020 - Tuesday April 14 2020
 
Hazards:
- Heavy rain across portions of the Lower Mississippi Valley, the Central Appalachians, the 
Tennessee Valley, the Mid-Atlantic, the Southern Appalachians, the Southeast, the Southern Plains, 
and the Ohio Valley, Sat-Tue, Apr 11-Apr 14.
- Heavy rain across portions of the Northeast, Mon-Tue, Apr 13-Apr 14.
- Heavy snow across portions of the High Plains, the Rockies, and the Central Great Basin  Sat-Mon, 
Apr 11-Apr 13.
- Flooding possible across portions of the Upper Mississippi Valley and the Northern Plains.
- Flooding occurring or imminent across portions of the Mississippi Valley, the Northern Plains, 
the Tennessee Valley, the Southern Plains, and the Ohio Valley.
- Much below normal temperatures across portions of the High Plains, the Rockies, the Mississippi 
Valley, the Central Great Basin, and the Plains,  Sat-Tue, Apr 11-Apr 14.
- Heavy precipitation across portions of mainland Alaska, Mon-Tue, Apr 13-Apr 14.
- Much above normal temperatures across portions of mainland Alaska, Sun-Tue, Apr 12-Apr 14.
- Much below normal temperatures across portions of mainland Alaska, Fri, Apr 10.
 
Detailed Summary:

A upper-level energy over Western Canada trough will move southward over the Rockies by Monday 
while upper-level low over Southern California/Great Basin/Southwest moves eastward to Texas by 
Sunday. The energy will move northeastward to the Lower Great Lakes by Monday.  The two areas of 
energy will aid in producing a deep upper-level trough over the Western part of the country.  
Furthermore, an area of cold high pressure will build southward out of Western Canada moving 
southward to the Northern High Plains/Northern Rockies by Tuesday.  The deep trough and cold high 
pressure at the surface will aid in developing an area of Much Below Normal Temperatures over parts 
of the Rockies/Plains into parts of the Mississippi Valley, from Saturday into Monday.  The 
upper-level energy and upslope flow will aid in developing areas of Heavy Snow over the 
Northern/Central Rockies Saturday into Monday and into parts of the Southern Rockies by Tuesday.  
Meanwhile, upper-level energy over Northern Mexico on Saturday will move northeastward to the Lower 
Great Lakes by Monday.  An accompanying surface low over the Southern High Plains, Saturday, will 
roughly move northeastward to the Great Lakes by Monday and into Southeastern Canada by Tuesday.  
The accompanying front and moisture pooling along the boundary will aid in producing an area of 
Heavy Precipitation over parts of the South Plains into parts of the Lower Mississippi/Tennessee 
Valleys on Saturday moving into the Mid-Atlantic on Monday into Tuesday.

In Alaska, a very cold area of high pressure over the Alaska mainland will move southeastward into 
Canada by Sunday.  The high pressure will aid in producing an area of Much Below Normal 
Temperatures over the the interior mainland and South-Central mainland on Friday.  An upper-level 
ridging will begin to build in over the mainland on Saturday with the ridging extending as far 
north as the Far North on Sunday and Again by Tuesday.  The upper-level ridging will aid in 
producing and area of Much Above Normal Temperatures over parts of the Far North, likewise on 
Sunday into Tuesday.  In addition, Low pressure moving into Kodiak Island and the Kenai Peninsula 
along with an accompanying plume of moisture will aid in producing an area of Heavy Precipitation 
over parts of eastern Kenai Peninsula, eastern Kodiak Island, and Northern portion of the Alaska 
Peninsula on Monday into Tuesday.

Ziegenfelder