US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
601 PM EDT Mon Apr 06 2020
 
Valid Thursday April 09 2020 - Monday April 13 2020
 
Hazards:
- Heavy precipitation across portions of the Lower Mississippi Valley, the Tennessee Valley, the 
Mid-Atlantic, the Southern Appalachians, the Southeast, and the Southern Plains, Sat-Mon, Apr 
11-Apr 13.
- Heavy snow across portions of the Central Rockies, the Central Plains, the Central Great Basin, 
the Northern Plains, and the Northern Rockies, Sat-Mon, Apr 11-Apr 13.
- Heavy snow across portions of the Northeast, Thu-Fri, Apr 9-Apr 10.
- Flooding possible across portions of the Upper/Middle 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.
- Flooding likely across portions of the Upper/Middle Mississippi Valley.
- Much below normal temperatures across portions of the Central Plains, the Central Rockies, the 
Central Great Basin, the Northern Plains, the Northern Rockies, the Southern Rockies, and the 
Southern Plains, Sat-Mon, Apr 11-Apr 13.
- Much above normal temperatures across portions of mainland Alaska, Sun-Mon, Apr 12-Apr 13.
- Much below normal temperatures across portions of mainland Alaska, Thu-Fri, Apr 9-Apr 10.
 
Detailed Summary:

A deep upper-level low over the Great Lakes, on Thursday, will move eastward into Southeastern 
Canada by Thursday evening while an accompanying surface low will move eastward across Southeastern 
Canada to the Canadian Maritimes by Friday.  The storm will aid in developing an area of heavy Snow 
over parts of Northern New England on Thursday into Friday.  A developing deep upper-level trough 
will develop over the Rockies into the Southwest on Saturday into Monday.  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 and the High Plains, likewise, on Saturday into Monday.  Upper-level energy 
and upslope flow will aid in developing areas of Heavy Snow over the Northern/Central Rockies 
Saturday into Monday.  Meanwhile, upper-level energy over Northern Mexico on Saturday will move 
northeastward to the Mid-Atlantic by Monday. An accompanying surface low over the Texas Panhandle, 
Saturday, will, likewise, move to the Mid-Atlantic by Monday.  The accompanying front and moisture 
moving northward out of the Gulf of Mexico will aid in producing an area of Heavy Precipitation 
over parts of the Southeast into parts of the Lower Mississippi Valley and Tennessee Valley on 
Saturday into Monday.      


In Alaska, a very cold area of high pressure over the Alaska mainland spilling into the Gulf of 
Alaska will aid in producing an area of Much Below Normal Temperatures over the the interior 
mainland and South-Central mainland on Thursday into Friday morning.  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 Monday.  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 Monday.      

Ziegenfelder