US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
406 PM EDT Thu Aug 06 2020
 
Valid Sunday August 09 2020 - Thursday August 13 2020
 
Hazards:
- Severe weather across portions of the Northern/Central Plains, the Upper/Middle Mississippi 
Valley, and the Great Lakes, Sun, Aug 9.
- Flooding occurring or imminent across portions of the Middle Mississippi Valley.
 
Detailed Summary:

The medium range period (Sunday, Aug. 9 to Thursday, Aug. 13) will feature just 1 sensible weather 
related hazard area. The Storm Prediction center issued a risk area for severe weather over the 
Northern/Central Plains and Upper Midwest on Sunday. This instability will be forced by a piece of 
shortwave energy that breaks off from an upper level low in central Canada. There's a signal for 
heavy rain in the deterministic models, but ensemble means are much more tempered with totals and 
given the small areal coverage of the potential 1 inch rainfall. Elsewhere, scattered rain and 
thunderstorms will spread across the Southeast during the medium range period, but do not meet 
heavy rain criteria at this time. A large upper-level low may produce rainfall for the Pacific 
Northwest next Wednesday and Thursday, but confidence is low on it reaching criteria. 

Below Average temperatures are expected for parts of the Northern Rockies/Plains behind a cold 
front that'll sweep through the region on Sunday. Temperatures will be between 10-15 degrees below 
average, but do not meet criteria for a Much Below Normal tag. In the Northeast, an approaching low 
pressure system will draw warm air northward and into the area on Monday and Tuesday, causing 
temperatures to be 10-15 degrees above average. Temperatures will hover around normal elsewhere.

Potentially heavy rainfall will impact the Alaskan Panhandle on Sunday, with isolated areas of 1-2 
inches of rain possible. This is not enough to warrant a heavy rain hazard, though. Another area of 
low pressure will migrate across the Aleautians toward mainland Alaska on Thursday and will produce 
rain for the that area. Rainfall is forecast to remain below criteria for a heavy rain area at this 
time but may change over the next few days.

Kebede