Enhanced Risk for Severe Thunderstorms Across the Upper Midwest; Flash Flooding Possible from the Upper Midwest to Southern Plains and Desert Southwest Through Friday

Portions of the Upper Midwest will see an increased threat for severe thunderstorms through this evening, with a few strong tornadoes possible. The same region remains on alert for additional flash flood concerns. Heavy rainfall may lead to flash flooding across the Desert Southwest today, and Southern Plains by Friday. Finally, Major-to-record river flooding continues across the Carolinas.
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Last Update: 354 PM CDT Thu Sep 20 2018

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Brownsville, TX Local Forecast Office

26NM NNE Port Mansfield TX

Marine Zone Forecast


Synopsis: Light to moderate southeasterly winds will prevail tonight before wind speeds gradually diminish on Friday and into the weekend as the pressure gradient relaxes as a cold front moves into north central Texas before stalling during the weekend. Seas will remain low and steady through the period. Daily chances for showers and occasional thunderstorms will be possible which could lead to locally agitated seas under any thunderstorms at times.

Tonight
Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Isolated showers and thunderstorms.
Friday
Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Isolated showers and thunderstorms.
Friday Night
Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Scattered showers and thunderstorms.
Saturday
South winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 4 feet. Chance of showers and thunderstorms.
Saturday Night
Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. Seas 2 to 4 feet. Chance of showers and thunderstorms.
Sunday
South winds 5 to 10 knots shifting southeast in the afternoon. Seas 2 to 4 feet. Chance of showers and thunderstorms.
Sunday Night
Southeast winds 5 to 10 knots shifting south after midnight. Seas 2 to 3 feet. Chance of showers and thunderstorms.
Monday
Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Slight chance of showers and thunderstorms.
Monday Night
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Slight chance of showers and thunderstorms.
Tuesday
Southeast winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Chance of showers and thunderstorms.
Tuesday Night
Southeast winds 10 to 15 knots diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Chance of showers and thunderstorms.
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Last Update: 354 PM CDT Thu Sep 20 2018
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