FREEZING RAIN possible Tuesday morning
A parade of storms lined up off the coast will keep a steady stream of showers going for the next 7 days. High pressure will keep the valley dry for one more day. Clouds will increase through the afternoon as the first weak storm begins to moisten up our very dry airmass. Temperatures will also drop below freezing overnight. As showers begin early Tuesday morning, areas of FREEZING RAIN will be possible for a few hours around the Lewis-Clark Valley and Palouse. This will quickly change to all rain (LIGHT RAIN) over the valley. Expect 1/10 inch or less total (my calculation is .05") for Tuesday.
Rainfall totals gradually increase and total about 1.25 inches by Saturday night as juicier systems move in. Travelers should plan on HEAVY MOUNTAIN SNOW of 1 to 2 feet over the Cascades and N.Idaho mountains Wednesday through Thursday. Valleys south of I-90 can expect rain possibly mixed with SNOW Wednesday night and Thursday morning. L/C Valley rain totals should be a little less than ¼ inch (.12") Wed. about ¼ inch (.25")Thursday then adding ⅓ inch (.30") Friday.