US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
443 PM EDT Tue Mar 31 2020
 
Valid Friday April 03 2020 - Tuesday April 07 2020
 
Hazards:
- Heavy rain across portions of the Southern Plains, Tue-Wed, Mar 3-Mar 4.
- Heavy rain across portions of the Lower Mississippi Valley and the Southern Plains, Wed-Thu, Mar 
4-Mar 5.
- Heavy snow across portions of the Central Great Basin, California, and the Southwest, Sat-Tue, 
Apr 4-Apr 7.
- Flooding possible across portions of the Middle Mississippi Valley, the Great Lakes, 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.
- Flooding likely across portions of the Great Lakes, the Middle Mississippi Valley, the Southern 
Plains, the Upper Mississippi Valley, and the Northern Plains.
- Much below normal temperatures across portions of the Central Plains, the Northern Plains, and 
the Northern Rockies, Fri, Apr 3.
- High winds across portions of mainland Alaska, Fri-Sat, Apr 3-Apr 4.
- Much above normal temperatures across portions of mainland Alaska, Fri-Sat, Apr 3-Apr 4.
 
Detailed Summary:

A front moving southward over the Southern Plains will aid in producing showers and thunderstorms 
the Southern Plains on Friday producing an inch or more of rain in some locations.  As the front 
continues to move southward over the Western Gulf Coast into parts of the Central Gulf Coast by 
Saturday into Sunday.  Showers and thunderstorms will develop over parts of the Western/Central 
Gulf Coast producing an inch or more of rain in some locations on Saturday into Sunday.   

A deep upper-level low and associated upper-level trough over Western Canada will extend into parts 
of the Upper Midwest into parts of the Northern Rockies that will aid in keeping temperatures much 
below normal temperatures over parts of the Northern High Plains on Friday.  Meanwhile, a storm 
over the Eastern Pacific will move onshore over the West Coast on Saturday and move inland by 
Monday.  A weak plume of moisture will come onshore with the storm.  The moisture and low snow 
levels will aid in producing heavy snow over parts of Northern California on Saturday that will 
expand into the Sierra Nevada mountains by Sunday and slowly taper off by Tuesday.  

In Alaska, abnormally mild conditions will linger over the Far North north of the Brooks Range as 
an intense upper-level ridge over the state slowly weakens.  The upper-level ridging will aid in 
producing temperatures that are much above Normal temperatures through Saturday.   A deep area of 
low pressure over the North Pacific will move eastward into the northern mainland that will aid in 
producing an area of high wind over the Seward Peninsula of wind speed of 35 knots or greater on 
Friday into Saturday.   

Ziegenfelder