Heavy Precipitation and Strong Winds in the West; Locally Severe Weather in the East and Central Plains

Several atmospheric river events will bring widespread moderate to heavy precipitation and strong winds to much of the Pacific Northwest and California through early next week. A few storms might produce locally strong to damaging wind gusts over a portion of eastern North Carolina and Central Plains later today. More thunderstorms are forecast in the middle Mississippi Valley region on Sunday.
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Last Update: 352 PM CDT Fri Oct 22 2021

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62NM SW Grand Isle LA

Marine Zone Forecast


Synopsis: High pressure will shift to the east of the area tomorrow. A weak low pressure system will pass north of the waters on Sunday, and high pressure will then build back over the area on Monday and Tuesday. Another strong low pressure system will then impact the waters on Wednesday.

Tonight
East winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 6 seconds.
Saturday
East winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 7 seconds.
Saturday Night
Southeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Dominant period 6 seconds. Slight chance of showers after midnight.
Sunday
Southeast winds 15 to 20 knots. Seas 3 to 6 feet. Dominant period 6 seconds. Chance of showers and thunderstorms.
Sunday Night
Southeast winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 6 seconds. Chance of showers and thunderstorms through the night.
Monday
Southwest winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 6 seconds. Slight chance of showers.
Monday Night
Southwest winds near 10 knots. Seas 1 to 3 feet. Dominant period 5 seconds.
Tuesday
South winds near 10 knots becoming southeast in the late morning and afternoon. Seas 1 to 3 feet. Dominant period 5 seconds. Slight chance of showers and thunderstorms in the afternoon.
Tuesday Night
South winds 15 to 20 knots. Seas 1 to 3 feet. Dominant period 4 seconds. Waves or seas building to 3 to 5 feet with occasional seas to 5 feet. Dominant period 4 seconds after midnight. Chance of showers through the night. Slight chance of thunderstorms after midnight.
Wednesday
Southwest winds 15 to 20 knots. Seas 3 to 6 feet with occasional seas to 8 feet. Dominant period 5 seconds. Showers likely and chance of thunderstorms.
Wednesday Night
West winds 15 to 20 knots becoming northwest after midnight. Seas 3 to 6 feet with occasional seas to 8 feet. Dominant period 6 seconds. Chance of showers.
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ABOUT THIS FORECAST

Last Update: 352 PM CDT Fri Oct 22 2021
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