US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
506 PM EDT Mon Aug 24 2020
 
Valid Thursday August 27 2020 - Monday August 31 2020
 
Hazards:
- Heavy rain across portions of the Lower/Middle Mississippi Valley, the Central/Southern 
Appalachians, the Ohio/Tennessee Valley, the Mid-Atlantic, and the Southern Plains, Thu-Sat, Aug 
27-Aug 29.
- Heavy rain across portions of the Middle Mississippi Valley, the Great Lakes, and the Ohio 
Valley, Sun-Mon, Aug 30-Aug 31.
- Flooding possible across portions of the Southeast, the Lower Mississippi Valley, and the 
Southern Plains.
- Excessive heat across portions of the Southern Plains, Thu-Fri, Aug 27-Aug 28.
 
Detailed Summary:

The main threat during the medium range period (Thursday, August 27 - Monday, August 31), will be 
the heavy rainfall associated with what will then be Tropical Depression Laura. The current 
National Hurricane Center track has Laura making landfall somewhere along the central Gulf coast as 
a Hurricane on Thursday before moving northward through the Lower Mississippi Valley. It is then 
forecast to weaken into a Tropical Depression as it passes through the Middle Mississippi Valley on 
Friday and eventually into a Post-Tropical Cyclone as it turns East and approaches the Mid-Atlantic 
on Saturday. All-the-while producing heavy rainfall on the order of 2-5 inches along the way. Some 
isolated areas, particularly near the Louisiana Gulf coast, may see up to 6 inches. Storm force 
wind gusts are likely to be felt across parts of the central Gulf coast nearest the location where 
Laura makes landfall. There is no wind threat area for the Gulf coast at this time due to a lack of 
confidence in sustained winds reaching 'high wind' criteria. This, along with the exact track of 
the storm is subject to change. You can find more information about Hurricane Laura at the National 
Hurricane Center's website: www.nhc.ncep.noaa.gov.

The persistent upper-level high pressure over the southern tier states will lead to continued above 
normal temperatures and heat indices over 110 degrees across parts of southern Texas on Thursday 
and Friday. Therefore, an excessive heat hazard has been placed over that area for the 27th and 
28th.

For Alaska, a potent low pressure system is expected to track along the Aleutian islands and into 
the Bering Sea through the medium range period. This system may produce gale force winds over the 
Bering Sea and Gulf of Alaska. There may be a chance for heavy rainfall along the Alaskan Panhandle 
at the end of the medium range (Monday, August 31), but model guidance isn't confident enough for a 
hazard area to be placed there at this time.

Kebede