National Weather Summary for Wednesday, March 28, 2018
by David Moran, on Mar 28, 2018 10:56:35 AM
Thunderstorms may develop Wednesday from portions of South Texas into the Lower Mississippi Valley along and ahead of a cold front. Excessive rainfall will continue from the Southern Plains into the Ohio Valley through Thursday in association with the front mentioned above. Elevated winds and seas will continue for portions of the Gulf of Mexico through early Thursday afternoon.
- Thunderstorms from South Texas into the Lower Mississippi Valley on Wednesday
- Excessive Rainfall Continuing through Thursday from the Southern Plains into the Ohio Valley
- Elevated Winds and Seas Continuing for Portions of the Gulf of Mexico through Early Thursday Afternoon
- Potential for Thunderstorms Thursday for the Deep South
- Snow across the Upper Midwest Friday into Saturday
Thunderstorms from South Texas into the Lower Mississippi Valley on Wednesday
Scattered thunderstorms are forecast to continue developing along and ahead of a slow moving cold front. Plentiful low-level moisture and daytime heating will allow instability to build this afternoon. Conditions will be favorable for the development of severe thunderstorms capable of producing large hail, damaging winds, and tornadoes. Later tonight, storms could congeal into a squall line that may impact southeast Texas and Louisiana. Damaging winds will then become the primary hazard.
Major Cities in Region: San Antonio, TX, Austin, TX, Shreveport, LA, Little Rock, AR, Memphis, TN, Jackson, MS
Thunderstorm Risk for Wednesday
Excessive Rainfall Continuing through Thursday from the Southern Plains into the Ohio Valley
Showers and thunderstorms will overspread a region stretching from eastern and southeastern Texas northeastward into the Ohio Valley today and tomorrow as a cold front moves slowly through the region. Some areas of excessive rainfall will likely develop, which could lead to flash flooding along with a potential for river and stream flooding. Two day rainfall totals will range 2-4 inches with locally higher amounts in excess of 5 inches.
Major Cities in Region: Houston, TX, Shreveport, LA, Little Rock, AR, Memphis, TN, Jackson, MS, New Orleans LA, Nashville, TN, Louisville, KY, Cincinnati, OH
Rainfall Forecast for Wednesday and Thursday
Elevated Winds and Seas Continuing for Portions of the Gulf of Mexico through Early Thursday Afternoon
Elevated winds and seas will continue for portions of the Gulf of Mexico through early Thursday afternoon in association with a cold front. Winds will be southeasterly to south-southeasterly at 20-30 knots with gusts in excess of 35 knots. Seas of 5-8 feet are forecast near the shore and 7-10 feet in the deeper waters.
Potential for Thunderstorms Thursday for the Deep South
A cold front will continue to progress slowly across the Deep South on Thursday. Thunderstorms will likely be ongoing across the region during the early morning hours, though they may be weakening. As instability begins to increase again with daytime heating, additional thunderstorms are forecast to continue to develop and intensify during the afternoon. Some storms may become severe with large hail and damaging winds the primary hazards, but an isolated tornado or two cannot be ruled out.
Major Cities in Region: Baton Rouge, LA, Jackson, MS, New Orleans, LA, Mobile, AL, Birmingham, AL, Atlanta, GA
SPC Convective Outlook for Thursday
Snow across the Upper Midwest Friday into Saturday
An area of low pressure is forecast to develop over the Northern Rockies and move into the Northern Plains and Upper Midwest Friday into Saturday, bringing snow to portions of the Upper Midwest. Widespread snowfall amounts of 3-6 inches with locally higher amounts in excess of 8 inches are expected.
Major Cities in Region: Minot, ND, Fargo, ND, International Falls, MN, Duluth, MN
Snowfall Accumulation for Friday and Saturday
A Look Ahead
There will be a potential for snow across portions of the Northeast Sunday into Monday as a system moves through eastern Canada and the Northeast. Snow may develop across portions of the Upper Midwest and Northern Plains early next week.
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