Includes Mariposa County, Eastern Madera County and Yosemite National ParkOctober 28, 2020 - The National Weather Service Hanford Office reports the combination of dry fuels and low relative humidity values can contribute to erratic fire behavior today through Friday evening in the Sierra Nevada and Kern County mountains.
Any fires that develop will likely spread quickly.
Area Forecast Discussion National Weather Service Hanford CA 257 AM PDT Wed Oct 28 2020 .SYNOPSIS... A warming trend is expected today through Friday. High temperatures this weekend into early next week will be well above normal for this time of year. Dry weather will persist for the foreseeable future. && .DISCUSSION... An area of high pressure will build eastward across California today and tonight. High temperatures this afternoon will be around five degrees warmer than yesterday. A Rex Block will set up over the Eastern Pacific Ocean Thursday through Friday night. High temperatures Thursday afternoon will be six to eight degrees above normal for this time of year. Maximum temperatures Friday afternoon will be around ten degrees above their typical values for the end of October. The area of high pressure in the northern portion of the Rex Block will gradually weaken Saturday and Saturday night, before opening up into a ridge of high pressure Sunday, leading to the dissipation of the Rex Block. An area of low pressure aloft will be located in the vicinity of Southern California early next week. High temperatures each afternoon Saturday through Tuesday will be around ten degrees above normal for this time of year. Dry weather will persist for at least the next seven days. && .AVIATION... VFR conditions will prevail at MCE, MER, FAT, VIS, and BFL through at least the next 24 hours. MVFR visibilities and localized IFR visibilities due to smoke and haze are expected in the Sierra Nevada today and tonight. && .FIRE WEATHER... Elevated fire weather conditions are expected in the Sierra Nevada and Kern County mountains today through Friday. The combination of arid fuels and rather dry afternoon minimum relative humidity values can contribute to erratic fire behavior. Any fires that develop will likely spread quickly.