National Weather Service tells us:
…THREAT OF BLACK ICE ACROSS THE MOUNTAINS…DESERTS…AND INTERIOR VALLEY LOCATIONS TONIGHT… VERY COLD AIR COMING INTO SOUTHERN CALIFORNIA TONIGHT IN THE WAKE OF A VIGOROUS COLD FRONT. SNOW LEVELS WILL CONTINUE TO FALL QUICKLY TONIGHT…LOWERING TO AS LOW AS 1500 FEET OVERNIGHT IN SOME AREAS. IN MANY LOCATIONS…THE PRECIPITATION WILL END LATER THIS EVENING… WITH THE EXCEPTION OF THE NORTH SLOPES OF THE MOUNTAINS…WHERE A WINTER STORM WARNING REMAINS IN EFFECT. HOWEVER…THE INFLUX OF VERY COLD AIR WILL BRING THE THREAT OF BLACK ICE ACROSS MANY INTERIOR SECTIONS OF SOUTHERN CALIFORNIA. THE GREATEST THREAT OF ICY CONDITIONS WILL BE ACROSS THE MOUNTAINS AND ANTELOPE VALLEY… BUT ALL INTERIOR VALLEY LOCATIONS WILL ALSO BE VULNERABLE TO BLACK ICE CONDITIONS… INCLUDING WIND SHELTERED AREAS OF THE SANTA CLARITA VALLEY…SAN FERNANDO VALLEY…AND VENTURA COUNTY VALLEYS.
Instruction:
MOTORISTS TRAVELLING INTO THE MOUNTAINS… DESERTS… AND INTERIOR VALLEYS SHOULD BE PREPARED FOR SUB-FREEZING TEMPERATURES… VERY COLD WIND CHILL READINGS… AND DANGEROUS BLACK ICE CONDITIONS. PLEASE REFER TO THE LATEST WINTER STORM WARNING PRODUCT FOR DETAILS ON SNOW… AND NON PRECIPITATION WEATHER PRODUCT FOR DETAILS ON UPCOMING FROST AND FREEZE POTENTIAL.
Area: SAN LUIS OBISPO COUNTY CENTRAL COAST-SANTA BARBARA COUNTY CENTRAL COAST-SANTA YNEZ VALLEY-SAN LUIS OBISPO COUNTY INTERIOR VALLEYS-CUYAMA VALLEY-SANTA BARBARA COUNTY SOUTH COAST-VENTURA COUNTY COAST-LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS ANGELES-VENTURA COUNTY INTERIOR VALLEYS-VENTURA COUNTY COASTAL VALLEYS-SANTA MONICA MOUNTAINS RECREATIONAL AREA-SAN LUIS OBISPO COUNTY MOUNTAINS-SANTA BARBARA COUNTY MOUNTAINS-VENTURA COUNTY MOUNTAINS-LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE-ANTELOPE VALLEY-CATALINA ISLAND-SANTA CLARITA VALLEY-LOS ANGELES COUNTY SAN FERNANDO VALLEY-LOS ANGELES COUNTY SAN GABRIEL VALLEY-
