Enhanced Risk for Severe Thunderstorms Across the Upper Midwest; Flash Flooding Possible from the Upper Midwest to Southern Plains and Desert Southwest Through Friday

Portions of the Upper Midwest will see an increased threat for severe thunderstorms through this evening, with a few strong tornadoes possible. The same region remains on alert for additional flash flood concerns. Heavy rainfall may lead to flash flooding across the Desert Southwest today, and Southern Plains by Friday. Finally, Major-to-record river flooding continues across the Carolinas.
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Hazardous Weather Conditions

For More Weather Information:

Key West, FL Local Forecast Office

11NM ESE Sombrero Key Light FL

Marine Point Forecast

[NOTICE]
  • This
    Afternoon

    Scattered Showers

    Light Wind
    1ft

    High: 87 °F

  • Tonight

    Scattered Showers

    E 10kt
    1ft

    Low: 81 °F

  • Friday

    Scattered Showers

    ESE 10kt
    2ft

    High: 87 °F

  • Friday
    Night

    Scattered Showers

    E 10kt
    2ft

    Low: 80 °F

  • Saturday

    Scattered Showers

    E 10kt
    2ft

    High: 85 °F

  • Saturday
    Night

    Scattered Showers

    E 15kt
    2ft

    Low: 80 °F

  • Sunday

    Scattered Showers

    E 10kt
    2ft

    High: 87 °F

  • Sunday
    Night

    Scattered Showers

    E 10kt
    2ft

    Low: 81 °F

  • Monday

    Scattered Showers

    ESE 10kt
    2ft

    High: 88 °F


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:15 pm EDT Sep 20, 2018
Forecast Valid: 5pm EDT Sep 20, 2018-6pm EDT Sep 26, 2018

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Detailed Forecast


Synopsis: A ridge axis will extend west across the Florida Peninsula today through Monday. Meanwhile, a weak tropical wave will develop and move westward across Cuba and the Florida Keys Friday night through early Sunday.

The Approximate Shoreward Edge of the Gulf Stream as of September 20...

17 NM South of Dry Tortugas Light...on Loggerhead Key. 9 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 11 NM South of Sand Key Light...off Key West. 14 NM South of Looe Key...off Big Pine Key. 16 NM South of Sombrero Key Light...off Marathon. 11 NM Southeast of Alligator Reef Light...off Islamorada. 8 NM Southeast of Molasses Reef Light...off Key Largo. 4 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

This Afternoon
Variable winds 5 kt or less. Scattered showers and thunderstorms. Seas around 1 ft.
Tonight
E wind 5 to 10 kt. Scattered showers and thunderstorms. Seas around 1 ft.
Friday
ESE wind around 10 kt. Scattered showers and thunderstorms. Seas around 2 ft.
Friday Night
E wind around 10 kt. Scattered showers and thunderstorms. Seas around 2 ft.
Saturday
E wind around 10 kt. Scattered showers and thunderstorms. Seas around 2 ft.
Saturday Night
E wind 10 to 15 kt. Scattered showers and thunderstorms. Seas around 2 ft.
Sunday
E wind around 10 kt. Scattered showers and thunderstorms. Seas around 2 ft.
Sunday Night
E wind around 10 kt. Scattered showers and thunderstorms. Seas around 2 ft.
Monday
ESE wind 5 to 10 kt becoming S in the afternoon. Scattered showers and thunderstorms. Seas around 2 ft.

*Notices:

  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.
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ABOUT THIS FORECAST

Point Forecast: 24.54°N 80.91°W
Last Update: 3:15 pm EDT Sep 20, 2018
Forecast Valid: 5pm EDT Sep 20, 2018-6pm EDT Sep 26, 2018
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