The National Weather Service has issued the following advisories:
FLASH FLOOD WATCH IN EFFECT FROM MIDNIGHT HST TONIGHT THROUGH FRIDAY AFTERNOON The National Weather Service in Honolulu has issued a * Flash Flood Watch for Maui and the Big Island. * From midnight HST tonight through Friday afternoon. * An upper level low approaching the islands from the northeast will bring an unstable airmass to Maui and the Big Island. High pressure to the northeast will maintain a trade wind surface flow, focusing the heaviest of rain along windward areas. However the strong trade winds and the unstable airmass will allow for showers and thunderstorms to form over additional areas of Maui and the Big Island. The upper level low is expected to linger near these areas through the end of the week. 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.
WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM HST SATURDAY * WHAT...Snow expected. Plan on slippery road conditions. Total snow accumulations of 1 to 3 inches, with localized amounts up to 6 inches, are expected. * WHERE...Big Island Summits. * WHEN...Midnight to 6 AM Saturday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. 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.