US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
323 PM EDT Thu Jul 25 2019
 
Valid Sunday July 28 2019 - Thursday August 01 2019
 
Hazards:
- Heavy rain across portions of the Upper Midwest and the Upper Great Lakes, Sun, Jul 28.
- Flooding occurring or imminent across portions of the Mississippi and Missouri River Basins.
- Excessive heat across portions of California, Sun, Jul 28.
 
Detailed Summary:

The medium range period (Sunday, July 28 through Thursday, Aug 1) continues to be relatively quiet 
across the contiguous U.S. and Alaska. An upper level ridge anchored over the Four Corners region 
this weekend will lead to the potential for excessive heat, especially across much of Interior 
California and the lower elevations of the Southwest where daytime highs between 105 and 115 are 
forecast. An excessive heat area was drawn on today's medium range hazards chart for Sunday, July 
28th across the Central Valley of California where the threat appears highest, and also where the 
local NWS forecast offices have already posted excessive heat watches valid through Sunday. 
Elsewhere, a front traversing through the northern tier states should present a threat for 
scattered showers and thunderstorms, with the best potential for at least locally heavy rainfall 
across parts of the Upper Midwest and Upper Great Lakes on Sunday, July 28. For continuity reasons, 
opted to maintain a heavy rain area across this region which is a slight northward shift from 
yesterday based on the latest model guidance. 

Santorelli