* AFFECTED AREA...Fire Weather Zones 238, 239, 240, 242, 243, 244, 245, 246, 248, 249, 250 and 251. * TIMING...From Thursday morning through Thursday afternoon. * WINDS...Northwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.