INTERAGENCY FIRE WEATHER CENTER PREDICTIVE SERVICES UNIT

 

WEDNESday, SEPTEMBER 17, 2014

SOUTHERN CALIFORNIA GEOGRAPHICAL AREA COORDINATION CENTER

RIVERSIDE, CALIFORNIA

***Scattered wet thunderstorms over much of Southern California today***

***Isolated showers and wet thunderstorms possible in portions of Central California Thursday and Friday***

One last hot day can be expected over the state as high pressure over the Southwest gradually gives way to a trough over the Pacific Northwest. Temperatures will range from the 80s in the mountains above 6,000 feet to 105 in the valleys and lower foothills. An increase in low level moisture will allow for scattered wet thunderstorms to occur over the Angeles, San Bernardino and Cleveland National Forest to develop by noon today. Over the deserts, widespread thunderstorms will be possible, mainly south of I-15. The storms will be slow-moving and will be capable of producing heavy rainfall. Tonight, the trough will begin to ease into the area, which may produce local north winds of 15-25 mph along the south coast of Santa Barbara County. These winds will end shortly after sunrise. Thursday and Friday, much cooler weather will return due to onshore flow. Highs will be 10-15 degrees cooler over most regions outside the desert. Gusty winds up to 40 mph will be likely in the Banning Pass, Canyon Country and Antelope Valley Thursday afternoon. Over Southern California, only isolated storms are expected on Thursday, mainly over Imperial County. Meanwhile, a weak low pressure area will generate isolated showers and a few wet thunderstorms over the Sierras and Monterey County Thursday and Friday. Easterly winds may allow for a couple of storms to reach the Sierra Foothills Thursday afternoon. Isolated storms are expected to continue in the Sierras and northern Inyo National Forest over the weekend with mostly sunny skies and seasonal temperatures elsewhere. Next week, a very strong ridge may rebuild over the area, leading to another unwelcome stretch of hot weather. END/RK