324 WWHW40 PHFO 171318 WSWHFO URGENT - WINTER WEATHER MESSAGE National Weather Service Honolulu HI 318 AM HST Sat Feb 17 2018 ...WINTER WEATHER ADVISORY FOR BIG ISLAND SUMMITS ABOVE 10500 FEET FROM NOON TODAY THROUGH MONDAY... .Abundant low to mid level moisture will remain over the Big Island through much of the weekend. As a strong upper level trough moves overhead on Saturday, heavy snow showers and thunderstorms will likely develop. HIZ028-180230- /O.UPG.PHFO.WS.A.0002.180217T2200Z-180220T0400Z/ /O.NEW.PHFO.WW.Y.0006.180217T2200Z-180220T0400Z/ Big Island Summits- 318 AM HST Sat Feb 17 2018 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO 6 PM HST MONDAY FOR THE BIG ISLAND SUMMITS... * WHAT...Snow expected. Plan on slippery road conditions. Travel to the summits is discourages. Total snow accumulations of 2 to 4 inches, with localized amounts up to 10 inches, are expected. * WHERE...Big Island Summits above 10,500 feet.. * WHEN...Noon today to 6 PM Monday. * 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. $$