...WINTER WEATHER ADVISORY FOR THE BIG ISLAND SUMMITS THROUGH TONIGHT... .Mid-level moisture will bring light snow accumulations with gusty winds mainly through this evening. Snow showers and the gusty winds should taper off tonight. ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 AM HST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of up to 2 inches this afternoon and evening. Winds gusting as high as 40 mph. * WHERE...Big Island Summits. * WHEN...Until 6 AM HST Wednesday. * IMPACTS...Plan on slippery road conditions.