452 WWHW40 PHFO 031253 WSWHFO URGENT - WINTER WEATHER MESSAGE National Weather Service Honolulu HI 253 AM HST Sat Nov 3 2018 ...SNOW FORECAST OVER BIG ISLAND SUMMITS THROUGH SUNDAY MORNING... .An upper level low will decrease temperatures over the Big Island summits below the freezing level and produce convective snow showers through Sunday morning. HIZ028-040200- /O.NEW.PHFO.WW.Y.0010.181103T1253Z-181104T1600Z/ Big Island Summits- 253 AM HST Sat Nov 3 2018 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 AM HST SUNDAY... * WHAT...Snow occurring. Plan on slippery road conditions. Storm total snow accumulations around three inches are expected. * WHERE...Big Island Summits. * WHEN...Until 6 AM Sunday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities and slick icy roads. 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. $$ RCB