IN WEST IN WINTER CONT.
USUALLY THERE IS A SIGNIFICANT RAIN SHADOW TO THE LEE OF THE MOUNTAINS.
MOUNTAIN MAPPER AND THE RHEA OROGRAPHIC TECHNIQUE CAN COMBINE TO PROVIDE A VERY GOOD FIRST GUESS.
WHEN MOISTURE IS UNUSUALLY DEEP RAIN, HEAVY RAIN WILL FALL ON THE LEEWARD SIDE OF THE SIERRA RANGE IN WESTERN NV AND EASTERN CA.
SIGNIFICANT SKILL IN 24 HOURS FORECASTS, SKILL IS CONSIDERABLY LOWER FOR 6 HOURLY FORECASTS.