Increasing Risk for Flash and River Flooding Through the Weekend

A storm system will track across the central U.S. and set the stage for severe thunderstorms and widespread heavy rainfall through the weekend. There will be a threat for flash and river flooding for portions of the Southern Plains into the Upper Midwest.
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Last Update: 357 PM CDT FRI APR 28 2017

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19NM SE Grand Isle LA

Marine Zone Forecast

SEAS ARE PROVIDED AS A RANGE OF THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES...ALONG WITH THE OCCASIONAL HEIGHT OF THE AVERAGE HIGHEST TEN PERCENT OF THE WAVES.

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...
Synopsis: A STRENGTHENING LOW PRESSURE SYSTEM WILL AFFECT THE COASTAL WATERS THROUGH THE WEEKEND. THE LOW WILL PUSH AWAY FROM THE AREA BY MONDAY ALLOWING HIGH PRESSURE TO SETTLE IN FOR TUESDAY.

Tonight
Southeast winds 20 to 25 knots. Seas 4 to 7 feet with occasional seas to 9 feet. Dominant period 7 seconds.
Saturday
Southeast winds 20 to 25 knots. Seas 4 to 7 feet with occasional seas to 9 feet. Dominant period 8 seconds.
Saturday Night
Southeast winds 25 to 30 knots. Seas 6 to 10 feet with occasional seas to 11 feet. Dominant period 8 seconds.
Sunday
South winds 25 to 30 knots. Seas 8 to 12 feet with occasional seas to 13 feet. Dominant period 9 seconds. Chance of showers and thunderstorms early in the morning, then showers and thunderstorms likely in the late morning and afternoon.
Sunday Night
Southwest winds 20 to 25 knots becoming northwest 15 to 20 knots after midnight. Seas 6 to 10 feet with occasional seas to 11 feet. Dominant period 9 seconds. Waves or seas subsiding to 5 to 8 feet with occasional seas to 9 feet. Dominant period 9 seconds after midnight. Showers and thunderstorms likely in the evening, then chance of showers and slight chance of thunderstorms after midnight.
Monday
North winds 15 to 20 knots becoming northeast 5 to 10 knots in the afternoon. Seas 5 to 8 feet with occasional seas to 10 feet. Dominant period 8 seconds. Waves or seas subsiding to 4 to 7 feet with occasional seas to 8 feet. Dominant period 8 seconds in the afternoon.
Monday Night
East winds 5 to 10 knots. Seas 3 to 5 feet. Dominant period 7 seconds.
Tuesday
Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 7 seconds.
Tuesday Night
Southeast winds 15 to 20 knots. Seas 3 to 5 feet. Chance of showers and thunderstorms.
Wednesday
South winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Showers and thunderstorms likely.
Wednesday Night
South winds 15 to 20 knots. Seas 4 to 7 feet with occasional seas to 9 feet. Showers and thunderstorms likely.
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ABOUT THIS FORECAST

Last Update: 357 PM CDT FRI APR 28 2017
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