US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
333 PM EDT Wed Apr 01 2020
 
Valid Saturday April 04 2020 - Wednesday April 08 2020
 
Hazards:
- 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 Upper/Middle Mississippi Valley, the Great Lakes, 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 Great Lakes, the Middle Mississippi Valley, the Southern 
Plains, the Upper Mississippi Valley, and the Northern Plains.
- Heavy precipitation across portions of mainland Alaska, Sat-Sun, Apr 4-Apr 5.
- High winds across portions of mainland Alaska, Sat-Sun, Apr 4-Apr 5.
- Much above normal temperatures across portions of mainland Alaska, Sat, Apr 4.
 
Detailed Summary:

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 Bering Sea will move eastward into the northern mainland that will aid in 
producing an area of high wind and heavy precipitation over the Seward Peninsula to the Pt. Hope 
and southward to Bethel with wind speed of 35 knots or greater and rain greater than 1 inch or 12 
inches of snow on Saturday into Sunday.

A front moving southward over the Southern Plains will move northward as a warm front on Monday.  
The front will aid in producing showers and thunderstorms over the Southern Plains and parts of the 
Gulf Coast and northward to the Middle Mississippi Valley.  The precipitation has a lot of 
uncertainty so there is no confidence in location of 1 inch or greater areas of rain on Saturday 
into Sunday.

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.

Ziegenfelder