530 WWHW40 PHFO 121835 WSWHFO URGENT - WINTER WEATHER MESSAGE National Weather Service Honolulu HI 835 AM HST Tue Feb 12 2019 ...WINTER STORM WATCH FOR HALEAKALA SUMMIT AND BIG ISLAND SUMMITS... .Very cold air aloft will once again move over the islands, beginning tonight and continuing into Friday. Additionally, moisture is expected to occasionally spread to the elevations of the summits, with bouts of winter weather expected. HIZ022-130745- /O.NEW.PHFO.WS.A.0001.190213T1000Z-190215T1600Z/ Haleakala Summit- 835 AM HST Tue Feb 12 2019 ...WINTER STORM WATCH IN EFFECT FROM LATE TONIGHT THROUGH LATE THURSDAY NIGHT... * WHAT...Periods of freezing rain and snow possible. * WHERE...Haleakala Summit and upper slopes. * WHEN...From late tonight through late Thursday night. * ADDITIONAL DETAILS...Significant reductions in visibility are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is potential for significant snow, sleet or ice accumulations that may impact the summits. Anyone planning travel to the summits, including hikers and campers, should monitor the latest forecasts and consider postponing their trip until improved weather returns. $$ HIZ028-130745- /O.NEW.PHFO.WS.A.0001.190213T1600Z-190215T1600Z/ Big Island Summits- 835 AM HST Tue Feb 12 2019 ...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE THURSDAY NIGHT... * WHAT...Period of freezing rain and snow possible. * WHERE...Big Island Summits. * WHEN...From Wednesday morning through late Thursday night. * ADDITIONAL DETAILS...Significant reductions in visibility are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is potential for significant snow, sleet or ice accumulations that may impact the summits. Anyone planning travel to the summits, including hikers and campers, should monitor the latest forecasts and consider postponing their trip until improved weather returns. $$ Birchard