Increasing Risk for Flash and River Flooding Through the Weekend

A storm system will track across the central U.S. and set the stage for severe thunderstorms and widespread heavy rainfall through the weekend. There will be a threat for flash and river flooding for portions of the Southern Plains into the Upper Midwest.
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Honolulu, HI Local Forecast Office

8NM NE Waimanalo Beach HI

Marine Point Forecast

[NOTICE]
  • Today

    Heavy Rain

    Winds IncreasingN 8kt
    5ft

    High: 77 °F

    Small Craft Advisory
    Small Craft Advisory

  • Tonight

    Heavy Rain

    NNE 16kt
    5-7ft

    Low: 74 °F

    Small Craft Advisory
    Small Craft Advisory

  • Saturday

    Heavy Rain

    NNE 17kt
    7ft

    High: 74 °F

  • Saturday
    Night

    Heavy Rain

    N 16kt
    5-7ft

    Low: 70 °F

  • Sunday

    Heavy Rain

    NNE 10kt
    5ft

    High: 74 °F

  • Sunday
    Night

    Heavy Rain

    NE 6ktWinds Decreasing
    5-6ft

    Low: 70 °F

  • Monday

    Heavy Rain

    SE 6kt
    6ft

    High: 75 °F

  • Monday
    Night

    Heavy Rain

    Light Wind
    5-6ft

    Low: 71 °F

  • Tuesday

    Scattered Showers

    Light Wind
    4-5ft

    High: 77 °F


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:01 am HST Apr 28, 2017
Forecast Valid: 8am HST Apr 28, 2017-6pm HST May 4, 2017

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY SATURDAY

Synopsis: A COMPLEX WEATHER PATTERN IS EXPECTED THROUGH MUCH OF THE PERIOD. A FRONT WILL PASS KAUAI TODAY BEFORE STALLING OVER THE CENTRAL ISLANDS SATURDAY. AN UPPER LEVEL LOW DEVELOPING NORTH OF THE STATE AND ASSOCIATED SURFACE LOW WILL THEN SHIFT OVER THE ISLANDS LATE SATURDAY...AND CONTINUE TO BRING UNSETTLED CONDITIONS THROUGH THE PERIOD.

Today
Variable winds less than 5 kt becoming N 5 to 8 kt in the afternoon. Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Some of the storms could produce heavy rainfall. Mixed swell...NW 2 ft at 10 seconds and S 2 ft at 17 seconds. Waves around 5 ft.
Tonight
NNE wind 12 to 16 kt. Showers likely and possibly a thunderstorm before midnight, then scattered showers and thunderstorms after midnight. Some of the storms could produce heavy rainfall. Mixed swell...NW 3 to 4 ft at 10 seconds and S 2 ft at 16 seconds. Waves 5 to 7 ft.
Saturday
NNE wind around 17 kt. Scattered showers and thunderstorms. Some of the storms could produce heavy rainfall. Mixed swell...NW 4 ft at 9 seconds and S 2 ft at 15 seconds. Waves around 7 ft.
Saturday Night
N wind 11 to 16 kt. Scattered showers, with thunderstorms also possible after midnight. Some of the storms could produce heavy rainfall. Mixed swell...NW 4 ft and S 2 ft. Waves 5 to 7 ft.
Sunday
NNE wind around 10 kt. Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mixed swell...NW 4 ft and S 2 ft. Waves around 5 ft.
Sunday Night
NE wind around 6 kt becoming variable and less than 5 kt after midnight. Scattered showers and thunderstorms. Some of the storms could produce heavy rainfall. Widespread haze. Mixed swell...NNW 4 to 5 ft and S 2 ft. Waves 5 to 6 ft.
Monday
SE wind around 6 kt. Scattered showers and thunderstorms. Some of the storms could produce heavy rainfall. Widespread haze. Mixed swell...N 5 ft and S 2 ft. Waves around 6 ft.
Monday Night
Variable winds 5 kt or less. Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Widespread haze. Mixed swell...N 4 to 5 ft and S 2 ft. Waves 5 to 6 ft.
Tuesday
Variable winds 5 kt or less. Scattered showers. Widespread haze. Mixed swell...NW 3 to 4 ft and S 2 ft. Waves 4 to 5 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: 21.4°N 157.58°W
Last Update: 6:01 am HST Apr 28, 2017
Forecast Valid: 8am HST Apr 28, 2017-6pm HST May 4, 2017
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