US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
239 PM EST Fri Mar 12 2021
 
Valid Monday March 15 2021 - Friday March 19 2021
 
Hazards:
- Heavy rain across portions of the Lower/Middle Mississippi Valley, the Ohio/Tennessee Valley, the 
Mid-Atlantic, the Southern Appalachians, the Southeast and the Great Lakes, Mon-Tue, Mar 15-Mar 16.
- Heavy rain across portions of the Southeast, the Mid-Atlantic, the Lower Mississippi Valley, the 
Southern Appalachians, and the Tennessee Valley, Wed-Thu, Mar 17-Mar 18.
- Flooding possible across portions of the Central/Southern Plains, the Middle/Lower Mississippi 
Valley, and the Ohio Valley.
- Flooding occurring or imminent across portions of the Middle Mississippi Valley and the Ohio 
Valley.
- Flooding likely across portions of the Central Plains and the Middle Mississippi Valley.
 
Detailed Summary:

The main areas of concern during the medium range period (Monday, March 15th - Wednesday, March 
19th) will be across the Midwest and Southeast, where an upper-level low and quasi-stationary front 
are forecast to generate heavy rain and isolated thunderstorms through midweek. A closed 
upper-level low will begin to negatively tilt on Monday which will draw heavy rain and 
thunderstorms up from the Lower/Middle Mississippi Valley and into the Tennessee Valley and 
Midwest. Some light snow may materialize over parts of the interior Northeast/Northern Appalachians 
on Tuesday. Another system will follow in behind the previous one, bringing with it the potential 
for another round of heavy rainfall to parts of the Southeast and Mid-Atlantic through mid-week.

Light to moderate rain and snow will impact Alaska's southern coast and panhandle through the 
middle of the week, although model confidence isn't high regarding aerial coverage and magnitude of 
precipitation at the moment. High pressure will settle over much of the mainland from Tuesday 
onward.

Kebede