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Forecast
As of 3:30 am PST on February 9, 2010 Today...Increasing clouds. A chance of rain in the morning...then showers likely and a slight chance of thunderstorms in the afternoon. Some thunderstorms may produce small hail. Highs in the mid 50s to lower 60s. Southeast winds around 15 mph shifting to the southwest in the afternoon. Chance of precipitation 70 percent. Tonight...Showers with a chance of thunderstorms. Some thunderstorms may produce small hail. Lows in the mid to upper 40s. Wednesday...Decreasing clouds. A 40 percent chance of showers in the morning. Highs in the mid 50s to lower 60s. West winds around 15 mph in the afternoon. 5-day forecast | Marine forecast | Pollen forecast | Air Pollution
5-day forecast
Almanac Key: T = Trace of precipitation; MM = data not available
Special Weather Statement Issued by the National Weather Service at 3:42 am PST on February 9, 2010 ... A cold and vigorous storm system will affect southwestern California today through early Wednesday... A strong and cold upper low off the northern California coast is forecast to drop southward today... tracking just west of southwestern California later today and night. This system will threaten the region with a variety of weather hazards... including heavy showers... thunderstorms... gusty winds and moderate to heavy snow accumulations with low snow levels. Showers will develop north of Point Conception early this morning... then spread into Ventura and Los Angeles counties by this afternoon. Showers will begin to decrease from northwest to southeast across the region tonight. Scattered showers will linger into early Wednesday across Los Angeles and Ventura counties. While moisture was still fairly limited with this system... it is expected to tap into some Pacific moisture as it moves toward the region later today and tonight. Cold air aloft associated with the approaching upper low will cause increasing instability through the atmosphere this afternoon into tonight... leading to a chance of thunderstorms... some of which could produce small hail... very heavy downpours and gusty winds. It is not out of the question that some hail could approach severe limits... and some waterspouts in the coastal waters could come ashore as weak tornados. Since the precipitation will be showery in nature... rainfall totals through early Wednesday will be highly variable... but will average one third of an inch to one inch across the area... with local totals over 2 inches possible in areas that receive thunderstorms. It appears that the highest rainfall totals will occur across Los Angeles County... especially across eastern sections... including the station and Morris burn areas. These areas will also have the best chance of receiving thunderstorms with high intensity rainfall. A Flash Flood Watch has been posted for the recent burn areas of Los Angeles and Santa Barbara counties. Please refer to (laxffalox) for additional information. Due to the cold nature of this storm... snow will likely fall at very low elevations across the region... impacting travel on major routes into and through the mountains such as Interstate 5 through the Grapevine and possibly portions of the 14 freeway. Snow levels are expected to start out between 4000 and 5000 feet today... then will lower to between 3000 and 4000 feet tonight. There is a chance that snow levels could lower to 2500 feet late tonight... which could bring accumulating snows into the foothills above the Antelope Valley... the Cuyama Valley... and the interior valleys of San Luis Obispo County. In the mountains of Los Angeles and Ventura counties... snow accumulations of 6 to 12 inches are expected... with local totals as high as 16 inches in the san Gabriels. In the mountains of San Luis Obispo and Santa Barbara counties... 3 to 6 inches of snow are expected. Please refer to (laxwswlox) for more details. Residents of southwest California are urged to stay tuned to the latest National Weather Service statements and possible watches and warnings as this weather situation continues to develop. Bruno/asr Back to top
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