Dangerous Heat Building in the West; Severe Storms in the Upper Midwest

A long duration heat wave will build across the Southwest, California, and Pacific Northwest. Dangerous heat is also forecast for the Great Basin and South Plains. Severe storms in the Upper Midwest may have locally heavy rain, damaging winds, and very large hail. Heavy rain and flooding will also be possible in the Deep South and Appalachians.
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Hazardous Weather Conditions

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San Juan, PR Local Forecast Office

41NM N San Juan PR

Marine Point Forecast

[NOTICE]
  • Overnight

    Scattered Showers

    E 17kt
    4ft

    Low: 82 °F

  • Friday

    Isolated Showers

    ENE 16kt
    4ft

    High: 84 °F

  • Friday
    Night

    Scattered Showers

    ENE 19kt
    5ft

    Low: 82 °F

  • Saturday

    Isolated Showers

    E 16kt
    4ft

    High: 83 °F

  • Saturday
    Night

    Scattered Showers

    ENE 12kt
    4ft

    Low: 82 °F

  • Sunday

    Scattered Showers

    ESE 11kt
    4-5ft

    High: 83 °F

  • Sunday
    Night

    Scattered Showers

    ESE 14kt
    4ft

    Low: 83 °F

  • Monday

    Scattered Showers

    ESE 14kt
    4ft

    High: 84 °F

  • Monday
    Night

    Partly Cloudy

    E 18kt
    4ft

    Low: 83 °F


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 7:30 pm EDT Aug 13, 2020
Forecast Valid: 2am EDT Aug 14, 2020-6pm EDT Aug 20, 2020

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Detailed Forecast


Synopsis: Moderate to fresh trade winds will persist across the regional waters through the end of the work-week, resulting in choppy seas. Tropical Storm Josephine is still forecast to track north of the region during the weekend. This could result in some hazardous marine conditions, mainly across the offshore Atlantic waters, as well as an increase in shower and isolated thunderstorm activity.

Overnight
E wind around 17 kt, with gusts as high as 23 kt. Scattered showers. Seas around 4 ft.
Friday
ENE wind 14 to 16 kt, with gusts as high as 22 kt. Isolated showers before 3pm. Seas around 4 ft.
Friday Night
ENE wind 17 to 19 kt, with gusts as high as 26 kt. Scattered showers. Seas around 5 ft.
Saturday
E wind 12 to 16 kt, with gusts as high as 22 kt. Isolated showers before 9am, then isolated showers after noon. Seas around 4 ft.
Saturday Night
ENE wind 10 to 12 kt. Scattered showers and thunderstorms. Seas around 4 ft.
Sunday
NE wind 7 to 11 kt becoming ESE in the afternoon. Scattered showers. Seas 4 to 5 ft.
Sunday Night
ESE wind around 14 kt. Scattered showers. Seas around 4 ft.
Monday
ESE wind around 14 kt. Scattered showers. Seas around 4 ft.
Monday Night
E wind 16 to 18 kt, with gusts as high as 24 kt. Partly cloudy. 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: 19.09°N 65.99°W
Last Update: 7:30 pm EDT Aug 13, 2020
Forecast Valid: 2am EDT Aug 14, 2020-6pm EDT Aug 20, 2020
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RADAR & SATELLITE IMAGES

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