Heavy Rain and Flooding, and Significant Wintry Impacts for the Central U.S.

A strong frontal boundary slowing as it moves into the central U.S. will tap into deep moisture to produce heavy rain and flooding, and a significant ice storm. Rain totals up to 7 inches, with isolated higher amounts, will be possible. Significant icing up to a third of an inch may occur in the central Plains and Middle Missouri Valley. Continued cold weather with snow to low elevations out west.
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Hazardous Weather Conditions

Last Update: 316 PM CST Tue Feb 20 2018

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62NM SW Grand Isle LA

Marine Zone Forecast


Synopsis: A cold front moving through the Plains States will become stationary well north of the coast Wednesday night then move back northwest Thursday. Another cold front will move off the coast late Sunday but become stationary in the north gulf Monday before moving north as a warm front Tuesday.

Tonight
Southeast winds near 15 knots. Seas 2 to 4 feet. Dominant period 7 seconds. Patchy fog.
Wednesday
Southeast winds near 15 knots. Seas 2 to 4 feet. Dominant period 7 seconds. Patchy fog through the day.
Wednesday Night
Southeast winds near 15 knots. Seas 2 to 4 feet. Dominant period 8 seconds. Patchy fog early in the evening, then widespread dense fog late in the evening.
Thursday
Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 7 seconds.
Thursday Night
Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 7 seconds. Slight chance of showers and thunderstorms.
Friday
Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 7 seconds. Chance of showers and thunderstorms.
Friday Night
Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 7 seconds. Chance of showers and thunderstorms through the night.
Saturday
South winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 7 seconds.
Saturday Night
South winds near 15 knots. Seas 2 to 4 feet. Slight chance of showers and thunderstorms.
Sunday
South winds 10 to 15 knots becoming southeast 5 to 10 knots late in the afternoon. Seas 2 to 4 feet. Slight chance of showers and thunderstorms through the day.
Sunday Night
South winds 10 to 15 knots. Seas 1 to 2 feet. Chance of showers and thunderstorms.
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ABOUT THIS FORECAST

Last Update: 316 PM CST Tue Feb 20 2018
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