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Organization: National Weather Service
Date: July 22, 2009
Temps Could Push Close to 110 Sunday
750 PM PDT WED JUL 22 2009
    HOT TEMPERATURES EXPECTED ONCE AGAIN FRIDAY INTO NEXT WEEK ... STRONG HIGH PRESSURE ALOFT WILL SLIDE TO THE EAST THROUGH THURSDAY ... PROVIDING A SMALL AMOUNT OF RELIEF TO THE REGION FROM THE HOT TEMPERATURES EXPERIENCED EARLIER THIS WEEK. THIS RELIEF WILL BE SHORT LIVED HOWEVER ... AS THE HIGH PRESSURE SYSTEM IS EXPECTED TO BUILD WESTWARD TOWARDS SOUTHERN CALIFORNIA BEGINNING ON FRIDAY ... WITH FURTHER STRENGTHENING OVER THE WEEKEND.
    ONCE THIS HIGH SLIDES BACK TO THE WEST ... HOT TEMPERATURES SIMILAR TO THIS LAST WEEKEND SHOULD RETURN TO SOUTHERN AND CENTRAL CALIFORNIA. THIS MEANS WIDESPREAD VALLEY AND MOUNTAIN TEMPERATURES BETWEEN 95 AND 105 DEGREES ARE EXPECTED ONCE AGAIN. A FEW SITES MAY PUSH CLOSE TO 110 DEGREES DURING THE PEAK OF THIS EVENT ON SUNDAY AND MONDAY ... ESPECIALLY IN THE ANTELOPE VALLEY. COASTAL AREAS WILL REMAIN MILD HOWEVER ... AS A SHALLOW MARINE WILL PERSIST INTO NEXT WEEK.
    THERE WILL ALSO BE A SMALL INCREASE IN HUMIDITIES ... WHICH WHEN COMBINED WITH THE HOT TEMPERATURES ... MAY DRIVE HEAT INDEX VALUES ABOVE CRITICAL LEVELS. THE AREAS MOST THREATENED WITH THESE CONDITIONS ARE THE LOWER ELEVATIONS OF THE INTERIOR MOUNTAIN RANGES ... AS WELL AS THE INTERIOR VALLEYS OF SAN LUIS OBISPO AND SANTA BARBARA COUNTIES. THE HEAT INDEX IS A MEASURE OF DISCOMFORT LEVEL BASED ON A COMBINATION OF TEMPERATURE AND HUMIDITY.
    THIS LONG DURATION HEAT WAVE AFFECTING INLAND AREAS OF SOUTHERN CALIFORNIA CAN BE DANGEROUS FOR ANYONE ... ESPECIALLY FOR THE ELDERLY ... SMALL CHILDREN ... AND PETS. IF YOU PLAN ON BEING OUTDOORS ... REMEMBER TO REMAIN HYDRATED BY DRINKING PLENTY OF WATER ... WEAR LOOSE-FITTING CLOTHING AND A HAT ... AND REMAIN IN THE SHADE OR INDOORS AS MUCH AS POSSIBLE.
    NEVER LEAVE CHILDREN OR PETS IN CARS WITH THE WINDOWS UP OR CRACKED DURING THE DAY ... EVEN FOR A VERY SHORT TIME ... AS TEMPERATURES CAN QUICKLY REACH LETHAL LEVELS.
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