Snow, rain and thunderstorms forecasted for Hawaii - Hawaii News Now - KGMB and KHNL

Snow, heavy rain, monster surf forecasted for Hawaii

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Image from Mauna Kea on the Big Island of Hawaii (Taken Thursday) Image from Mauna Kea on the Big Island of Hawaii (Taken Thursday)
HILO, BIG ISLAND (HawaiiNewsNow) -

A little bit of everything in Hawaii's weather forecast. The National Weather Service says that parts of the state could see snow, heavy rain and large powerful surf.

*** High Surf

A High Surf Warning has been issued for north and west facing shores of Kauai and Niihau and north facing shores of Oahu, Molokai and Maui, and west facing shores of the Big Island.

A building Northwest swell will produce hazardous surf starting this evening for Kauai County and spreading to the Big Island late tonight. The Swell will have more of a westerly component than normal, so west facing shores of the Big Island will see much larger than normal surf.  

High Surf Warning now in effect from 4 pm this afternoon to 6 p.m. Friday for north and west facing shores of Niihau and Kauai and north facing shores of Oahu, Molokai and Maui.

  • Surf: 20 to 30 feet for north and west facing shores of Niihau and Kauai and north facing shores of Oahu Molokai and Maui with locally higher sets of 30 to 35 feet. The larger sets will be more frequent on north and west facing shores of Kauai and Niihau.

  • Timing: surf will begin building rapidly on Kauai and Niihau late this afternoon then spread eastward to Oahu Molokai and Maui tonight.

  • Impacts: High, expect Ocean Water occasionally sweeping across portions of beaches, very strong breaking waves and strong Longshore and Rip currents. Breaking waves may make navigating some Harbor channels dangerous.

Hazardous surf will continue through Friday evening.

*** Heavy Rain

A Flash Flood Watch for Maui County and the Big Island is in effect through early Friday morning.

A cold low aloft over the East half of the state will support heavy rain and thunderstorms through Thursday night.

 The Flash Flood Watch continues for.

  • Kahoolawe, Lanai, Maui, Molokai and the Big Island.

  • Until 6 a.m. Friday.

  • Widespread showers and possible thunderstorms will produce Locally heavy rainfall continue through Thursday night.

  • While the bulk of the rainfall will occur over windward slopes, Heavy showers will be possible elsewhere, especially during this afternoon. Intense rainfall over nearby slopes may produce flooding in area streams, canyons, and other Low- lying areas.

*** Snow  

A Winter Weather Advisory is in effect for Big Island summits above 12,000 feet.

A cold low aloft will support snow showers and possible thunderstorms over the summits of Mauna Kea and Mauna Loa through early Friday morning. The chance of hazardous winter weather will diminish Friday as the low moves off to the northeast.

Winter Storm Warning is cancelled.

  • Locations: Big Island summits above 12,000 feet.
  • Hazard types: Heavy snow.
  • Accumulations: less than six inches.
  • Timing: through Thursday night.
  • Impacts: snow showers may produce rapid accumulations of snow at elevations above 12,000 feet. The snow may be accompanied by gusty winds and Cloud-to-ground Lightning.
  • Winds: east 10 to 20 mph with localized gusts over 25 mph.
  • Temperatures: in the lower 30s.
  • Visibilities: near zero in the heaviest snow squalls.

Stay with HawaiiNewsNow.com for the latest updates you can also check out our Interactive radar.

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