Mid-Atlantic Severe Storms; Western Heat and Fire Weather Threats

A frontal system will produce a line of severe thunderstorms with potential for damaging winds, hail, and locally heavy rain in the Central Appalachians. Isolated storms may develop in the High Plains, Upper Midwest, and northern Gulf Coast. Dangerous heat and critical fire weather threats will develop across the Southwest and Great Basin. Record highs will be possible into the High Plains.
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Last Update: 304 PM EDT Sun Jun 13 2021

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Jacksonville, FL Local Forecast Office

10NM ESE Jekyll Island GA

Marine Zone Forecast


Synopsis: A frontal boundary will remain stalled over region this afternoon, and dissipate overnight. Another cold front will move into southeastern US Tuesday, then stall across area Tuesday night through Wednesday night, before dissipating Thursday. The region will be between high pressure to the east and a trough of low pressure to the north late in the week through the weekend.

.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of Jun 12, 2021 at 1200 UTC...

65 nautical miles east of Flagler Beach. 78 nautical miles east of Saint Augustine Beach. 90 nautical miles east of Jacksonville Beach. 88 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.

Tonight
Northwest winds 5 to 10 knots becoming west after midnight. Seas 2 to 3 feet with a dominant period 9 seconds. Mostly smooth on the intracoastal waters. Slight chance of showers and thunderstorms in the evening.
Monday
Northwest winds 5 to 10 knots becoming southeast in the afternoon. Seas 2 to 3 feet with a dominant period 9 seconds. A light chop on the intracoastal waters. Chance of showers and slight chance of thunderstorms.
Monday Night
South winds 5 to 10 knots becoming southwest 10 to 15 knots after midnight. Seas 2 to 3 feet with a dominant period 8 seconds. A light chop on the intracoastal waters. Slight chance of showers and thunderstorms.
Tuesday
Southwest winds 10 to 15 knots. Seas 2 to 3 feet. A moderate chop on the intracoastal waters. Slight chance of showers and thunderstorms in the morning, then chance of showers and thunderstorms in the afternoon.
Tuesday Night
Southwest winds 10 to 15 knots. Seas 3 to 4 feet. A light chop on the intracoastal waters. Slight chance of showers after midnight.
Wednesday
Southwest winds 10 to 15 knots. Seas 2 to 3 feet. A moderate chop on the intracoastal waters. Chance of showers and slight chance of thunderstorms.
Wednesday Night
Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Chance of showers and thunderstorms.
Thursday
Southwest winds 5 to 10 knots becoming southeast in the afternoon. Seas 2 to 3 feet. Chance of showers and thunderstorms.
Thursday Night
Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Slight chance of showers and thunderstorms.
Friday
South winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Slight chance of showers and thunderstorms.
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ABOUT THIS FORECAST

Last Update: 304 PM EDT Sun Jun 13 2021
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