Locally Heavy Rainfall Possible Over the Four Corners; Critical Fire Weather Conditions in the Great Basin

Monsoon moisture will result in locally heavy showers and thunderstorms over the Four Corners region, which could lead to flash flooding. While, critical fire weather threats are expected for much of the Great Basin, from dry and windy conditions. Finally, Tropical Cyclone Humberto remains well offshore of the Southeast, but rip currents and heavy surf are expected from Florida to the Carolinas.
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Last Update: 938 AM EDT Sun Sep 15 2019

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Miami - South Florida Local Forecast Office

9NM E South Palm Beach FL

Marine Zone Forecast


...Small Craft Should Exercise Caution...
Synopsis: Swells produced by Tropical Storm Humberto in the Atlantic will cause hazardous marine conditions to develop starting as soon as tonight. Showers and thunderstorms continue to be possible through the week, although the chances should be on a downward trend after the beginning of the week.

.GULF STREAM HAZARDS...Seas are forecast to build to 7 feet by Monday and increase to around 9 feet by Wednesday due to a northerly swell.

The approximate location of the west wall of the Gulf Stream as of Sep 14, 2019 at 1200 UTC...

11 nautical miles southeast of Fowey Rocks. 14 nautical miles east southeast of Port Everglades. 7 nautical miles east southeast of Lake Worth. 9 nautical miles northeast of Jupiter Inlet.

This data courtesy of the Naval Oceanographic Office.

Rest Of Today
West southwest winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Period 7 seconds. Intracoastal waters a light chop. Chance of showers in the morning. Chance of thunderstorms. Showers likely.
Tonight
West winds 5 to 10 knots along the coast to west 10 to 15 knots in the gulf stream. Seas 3 to 5 feet with occasional seas to 6 feet along the coast and 5 to 7 feet with occasional to 9 feet in the gulf stream. Period 8 seconds. North swell around 3 feet after midnight. Intracoastal waters a light chop. Showers likely and chance of thunderstorms late in the evening, then chance of showers and slight chance of thunderstorms after midnight.
Monday
West winds 5 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet along the coast and 5 to 7 feet with occasional to 9 feet in the gulf stream. Period 9 seconds. North swell around 3 feet. Intracoastal waters a light chop. Slight chance of thunderstorms in the morning. Chance of showers . Chance of thunderstorms.
Monday Night
Northwest winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas to 8 feet along the coast and 6 to 8 feet with occasional to 10 feet in the gulf stream. Period 9 seconds. North northeast swell 3 to 4 feet. Intracoastal waters a light chop. Chance of showers late in the evening. Slight chance of thunderstorms through the night. Slight chance of showers after midnight.
Tuesday Through Wednesday
North northeast winds 10 to 15 knots with gusts to around 25 knots. Seas 6 to 8 feet with occasional seas to 10 feet. North northeast swell 3 to 6 feet. Intracoastal waters a light chop. Slight chance of showers and thunderstorms.
Wednesday Night And Thursday
Northeast winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas to 10 feet. North swell 5 feet. Intracoastal waters choppy in exposed areas. Chance of showers and thunderstorms, then slight chance of showers and thunderstorms.
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Last Update: 938 AM EDT Sun Sep 15 2019
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