May 6, 2011 6:32 pm Dramatic Drop In Weather. Jeff Ranieri Has 20° To 30° Plunge In the Numbers. After 3 days of warm to hot weather the pattern has shifted. Details on if Weekend warming is expected. US & World Videos 1:43 Kari's forecast: Warm day, Saturday rain 2:33 Downtown First Thursdays offers new hope to struggling SF merchants 2:41 College-bound students face deadline to apply for state aid 0:22 Violence at UC Berkeley protest encampment results in injuries 0:34 President Biden to visit Bay Area for fundraiser