Severe Thunderstorms and Flash Flooding in the Central U.S.; A Dangerous Heatwave Coming to the West

A slow moving cold front will bring multiple rounds of widespread heavy rain, localized flash flooding, and severe thunderstorms from the central Plains into the Great Lakes through Saturday. A dangerous heatwave with record breaking and triple digit temperatures is expected this weekend into next week over the Northwest U.S. Excessive Heat Watches and Warnings have been issued.
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Hazardous Weather Conditions

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San Juan, PR Local Forecast Office

65NM NNE Aguadilla PR

Marine Point Forecast

[NOTICE]
  • Today

    Isolated Showers

    E 14kt
    4ft

    High: 82 °F

  • Tonight

    Scattered Showers

    E 16kt
    4ft

    Low: 80 °F

  • Saturday

    Showers Likely

    E 14kt
    3-4ft

    High: 82 °F

  • Saturday
    Night

    Scattered Showers

    ESE 18kt
    4-5ft

    Low: 80 °F

  • Sunday

    Scattered Showers

    E 16kt
    4ft

    High: 82 °F

  • Sunday
    Night

    Scattered Showers

    ESE 18kt
    4ft

    Low: 80 °F

  • Monday

    Mostly Sunny

    E 16kt
    4ft

    High: 82 °F

  • Monday
    Night

    Partly Cloudy

    E 17kt
    4ft

    Low: 81 °F

  • Tuesday

    Mostly Sunny

    E 16kt
    4ft

    High: 82 °F


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 4:35 am EDT Jun 25, 2021
Forecast Valid: 11am EDT Jun 25, 2021-6pm EDT Jul 1, 2021

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Detailed Forecast


Synopsis: Moderate easterly winds along with seas of up to 5 feet will prevail across the regional waters through the weekend. A tropical wave is forecast to move across the regional waters Saturday through Sunday. This will increase the chance for shower and isolated thunderstorm activity over the local waters and passages.

Today
E wind around 14 kt, with gusts as high as 21 kt. Isolated showers. Seas around 4 ft.
Tonight
E wind around 16 kt, with gusts as high as 22 kt. Scattered showers, mainly after 9pm. Seas around 4 ft.
Saturday
E wind around 14 kt. Showers likely and possibly a thunderstorm before noon, then scattered showers and thunderstorms after noon. Seas 3 to 4 ft.
Saturday Night
ESE wind around 18 kt, with gusts as high as 24 kt. Isolated showers, then scattered showers and thunderstorms after midnight. Seas 4 to 5 ft.
Sunday
E wind 14 to 16 kt, with gusts as high as 22 kt. Scattered showers, mainly before noon. Seas around 4 ft.
Sunday Night
ESE wind 16 to 18 kt, with gusts as high as 24 kt. Scattered showers. Seas around 4 ft.
Monday
E wind around 16 kt, with gusts as high as 22 kt. Mostly sunny. Seas around 4 ft.
Monday Night
E wind around 17 kt, with gusts as high as 23 kt. Partly cloudy. Seas around 4 ft.
Tuesday
E wind around 16 kt, with gusts as high as 22 kt. Mostly sunny. Seas around 4 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: 19.45°N 66.77°W
Last Update: 4:35 am EDT Jun 25, 2021
Forecast Valid: 11am EDT Jun 25, 2021-6pm EDT Jul 1, 2021
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