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Weather Information and Advisory Update for April 12th, 2019



The National Weather Service (NWS) has the following advisories that remain in effect until this evening:



FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON The Flash Flood Watch continues for - Maui and the Big Island. - Through 6 PM HST this evening.

- Moisture wrapping around a broad upper level low to the east of the state will bring frequent showers and isolated thunderstorms to Maui and the Big Island today. Rainfall will be heavy at times, potentially leading to flash flooding. Although most of the heavy rain will focus over windward areas due to the strong trade winds in place, heavy showers and thunderstorms will also remain possible across leeward areas. The threat for flash flooding is expected to diminish this evening. PRECAUTIONARY/PREPAREDNESS ACTIONS A Flash Flood Watch means that conditions are favorable for flash flooding. Flash flooding is LIFE THREATENING. Do not cross fast flowing water in your vehicle or on foot. Monitor later forecasts and be prepared to take action if a Flash Flood Warning is issued. If you experience heavy rain or rising water, head to higher ground immediately.

WIND ADVISORY NOW IN EFFECT UNTIL 6 PM HST THIS EVENING - WINDS: East to northeast 20 to 30 mph with localized gusts over 50 mph are expected across Lanai, Kahoolawe, the Maui central valley and leeward West Maui, as well as the South Kohala district of the Big Island. - TIMING: Through 6 PM HST this evening. - IMPACTS: Winds this strong could down tree branches and cause localized power outages. Motorists, especially those in high profile vehicles, are urged to drive with caution. PRECAUTIONARY/PREPAREDNESS ACTIONS A Wind Advisory means that sustained winds of at least 30 mph, or gusts of at least 50 mph, are expected. Motorists should use extra caution.

WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST SATURDAY - WHAT: Periods of snow will affect the summits today and tonight. Plan on slippery road conditions. Additional snow accumulations of 1 to 3 inches are expected. - WHERE: Big Island Summits above 11500 feet. - WHEN: Until 6 AM HST Saturday. - ADDITIONAL DETAILS: Be prepared for reduced visibilities at times in snow, along with blowing and drifting snow. PRECAUTIONARY/PREPAREDNESS ACTIONS A Winter Weather Advisory for snow means periods of snow will cause travel difficulties. Be prepared for snow covered roads and limited visibilities, and use extreme caution while driving.




As of 9:15 am Friday Morning, Mauna Kea Access Road at Hale Pohaku remains closed due to snow and icy conditions on the roadway and poor visibility up at the summit of Maunakea.


24-Hour Rainfall rate for Hawaii Island ending at 9:35 am Friday April 12th, 2019


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