Your morning Washington weather update We're tracking multiple weather alerts across Washington today, with flood warnings in effect for several river systems and a frost advisory for the inland valleys through 9 A.M. These chilly morning temperatures and ongoing flood concerns will shape your Monday plans. Starting early this morning, temperatures bottomed out near 48 degrees around 6 A.M., cold enough to trigger frost formation in sheltered valleys where readings dipped between 31 and 37 degrees.