US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
505 PM EDT Wed Apr 08 2020
 
Valid Saturday April 11 2020 - Wednesday April 15 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-Sun, Apr 11-Apr 12.
- Heavy rain across portions of the Southeast, Wed, Apr 15.
- Heavy rain across portions of the Mid-Atlantic and the Northeast, Mon, Apr 13.
- Heavy snow 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.
- Heavy snow across portions of the Great Lakes and the Upper Mississippi Valley, Sun-Tue, Apr 
12-Apr 14.
- Severe weather across portions of the Lower Mississippi Valley and the Southern Plains, Sat, Apr 
11.
- Severe weather across portions of the Southeast, the Southern Appalachians, the Lower Mississippi 
Valley, the Southern Plains, and the Tennessee Valley, Sun, Apr 12.
- Flooding possible across portions of the Upper Mississippi Valley and the Northern Plains.
- Flooding occurring or imminent across portions of the Lower Mississippi Valley, the Northern 
Plains, the Tennessee Valley, the Middle Mississippi Valley, the Upper Mississippi Valley, the 
Southern Plains, and the Ohio Valley.
- High winds across portions of the Central Plains, the Central Rockies, the Central Great Basin, 
the Northern Plains, the Northern Rockies, the Southern Rockies, the Middle Mississippi Valley, the 
Upper Mississippi Valley, and the Southern Plains, Sat-Mon, Apr 11-Apr 13.
- High winds across portions of the Central Plains, the Mid-Atlantic, the Lower Mississippi Valley, 
the Central Appalachians, the Northern Plains, the Tennessee Valley, the Middle Mississippi Valley, 
the Northeast, the Southern Appalachians, the Upper Mississippi Valley, the Great Lakes, and the 
Ohio Valley, Mon-Tue, Apr 13-Apr 14.
- Much below normal temperatures across portions of the Central Plains, the Central Rockies, the 
Lower Mississippi Valley, the Central Great Basin, the Northern Plains, the Great Lakes, the 
Northern Rockies, the Southern Rockies, the Middle Mississippi Valley, the Upper Mississippi 
Valley, the Southern Plains, and the Ohio Valley, Sat-Wed, Apr 11-Apr 15.
- Heavy precipitation across portions of mainland Alaska, Mon-Wed, Apr 13-Apr 15.
- High winds across portions of mainland Alaska, Tue-Wed, Apr 14-Apr 15.
- High winds across portions of the Aleutians, Sun-Mon, Apr 12-Apr 13.
- Much above normal temperatures across portions of mainland Alaska, Sun-Wed, Apr 12-Apr 15.
 
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 Wednesday. 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 Wednesday. 
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 Sunday. Another area of Heavy Rain will develop 
over parts of New England on Monday. Additional Heavy Rain will linger near the boundary over 
Florida on Wednesday. 

In Alaska, 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 into Wednesday. 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 Wednesday. In addition, Low pressure over the North Pacific 
will move into the Western Aleutians on Sunday.  The strong pressure gradient will aid in producing 
an area of high wind over the Western Aleutians on Sunday into Monday.  Another area of low 
pressure moving into the Alaska 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 Wednesday.  An area of low 
pressure will consolidate over the Aleutians wit a strong pressure gradient extending into parts of 
the Gulf of Alaska. The strong pressure gradient will aid in producing high wind over Kodiak Island 
Tuesday into Wednesday.

Ziegenfelder