750 WWHW40 PHFO 190818 AAA WSWHFO URGENT - WINTER WEATHER MESSAGE...UPDATED National Weather Service Honolulu HI 1018 PM HST Sun Feb 18 2018 ...WINTER WEATHER ADVISORY FOR BIG ISLAND AND HALEAKALA SUMMITS ABOVE 9000 FEET THROUGH MONDAY AFTERNOON... .Abundant moisture moving over the area will combine with a potent disturbance aloft to bring periods of wintry weather to the Big Island and Haleakala Summits through Monday. HIZ022-192130- /O.EXA.PHFO.WW.Y.0006.000000T0000Z-180220T0400Z/ Haleakala Summit- 1018 PM HST Sun Feb 18 2018 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM HST MONDAY... * WHAT...Snow expected. Plan on hazardous road conditions making travel to the summit dangerous. Snow accumulations up to 2 inches, with localized higher amounts are possible. * WHERE...Haleakala Summit above 9000 feet. * WHEN...Until 6 PM Monday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. Heavy bursts of snow could also be accompanied by lightning. 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. $$ HIZ028-192130- /O.CON.PHFO.WW.Y.0006.000000T0000Z-180220T0400Z/ Big Island Summits- 1018 PM HST Sun Feb 18 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST MONDAY... * WHAT...Snow occurring. Plan on slippery road conditions. Additional snow accumulations of 2 to 4 inches are expected. * WHERE...Big Island Summits. * WHEN...Until 6 PM Monday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. Heavy bursts of snow could also be accompanied by lightning. In addition to the snow, periods with strong winds will be possible. The road to Mauna Kea remains closed. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause travel difficulties. Be prepared for snow covered roads and limited visibilities, and use extreme caution while driving. $$ Gibbs