Excessive Heat Continues today for Portions of Central and Eastern U.S.; Change in Weather Pattern this Week

Dangerous heat and humidity continues today from portions of the Plains to the East Coast. A cold front will bring lower temperatures, and potential for strong to severe thunderstorms with damaging winds and heavy rain that could produce flash flooding to the Central and Eastern U.S. through early this week. High pressure shifts West this week with building heat and monsoonal moisture.
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Last Update: 306 PM EDT Sun Jul 21 2019

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Jacksonville, FL Local Forecast Office

9NM E Jacksonville Beach FL

Marine Zone Forecast


Synopsis: Surface high pressure will extend across the Florida peninsula through Monday with winds increasing to about 15-20 knots Monday night through early Tuesday morning in association with a low pressure trough develops in the NW. A stronger front will move southward toward the local waters late Tuesday and weaken near the local waters Wednesday and Thursday.

.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of Jul 20, 2019 at 1200 UTC...

36 nautical miles east northeast of Flagler Beach. 46 nautical miles east of Saint Augustine Beach. 62 nautical miles east southeast of Jacksonville Beach. 94 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.

Tonight
South winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 8 seconds. Inland waters a light chop.
Monday
South southeast winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 8 seconds. Inland waters a light chop.
Monday Night
South southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 4 seconds. Inland waters a moderate chop.
Tuesday
South winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 8 seconds. Inland waters a light chop. A chance of showers and thunderstorms.
Tuesday Night
Southwest winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 5 seconds. Inland waters a light chop. A chance of showers and thunderstorms.
Wednesday
West southwest winds 5 to 10 knots becoming west northwest in the afternoon. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop. Showers and a slight chance of thunderstorms.
Wednesday Night
North northwest winds 5 to 10 knots becoming east southeast after midnight. Seas 2 to 3 feet. Showers and a chance of thunderstorms.
Thursday
North winds 5 to 10 knots becoming northeast in the afternoon. Seas 1 to 2 feet. Showers and a slight chance of thunderstorms.
Thursday Night
East southeast winds 5 to 10 knots becoming south after midnight. Seas 1 to 2 feet. Showers likely and a chance of thunderstorms.
Friday
North northeast winds 5 to 10 knots becoming east in the afternoon. Seas 1 to 2 feet. Showers and a slight chance of thunderstorms.
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ABOUT THIS FORECAST

Last Update: 306 PM EDT Sun Jul 21 2019
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