939 WWHW40 PHFO 191354 WSWHFO URGENT - WINTER WEATHER MESSAGE National Weather Service Honolulu HI 354 AM HST Thu Apr 19 2018 HIZ028-200400- /O.UPG.PHFO.WS.A.0005.180419T1600Z-180421T0400Z/ /O.NEW.PHFO.WS.W.0003.180419T1600Z-180421T0400Z/ Big Island Summits- 354 AM HST Thu Apr 19 2018 ...WINTER STORM WARNING IN EFFECT UNTIL 6 PM HST FRIDAY... * WHAT...Heavy snow is expected to develop today. Storm total snow accumulations of 6 to 12 inches are expected. * WHERE...Big Island Summits above 12000 feet. * WHEN...Through 6 PM Friday. * ADDITIONAL DETAILS...Roads to the summits are expected to become snow covered and slippery, resulting in difficult travel conditions. Significant reductions in visibility are also expected, with visibilities near zero at times. Strengthening winds may also result in blowing and drifting snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are expected. Strong winds are also possible. This will make travel very hazardous or impossible. $$