Local Severe Weather Alert for Hawthorne, CA Los Angeles County Coast Including Downtown Los Angeles Special Weather Statement in effect HOT AND HUMID AIR MASS EXPECTED THURSDAY RETURN OF MONSOONAL MOISTURE FOR LATE WEEK AND THROUGH THE WEEKEND HIGH PRESSURE ALOFT WILL BUILD INTO THE AREA FROM THE EAST OVER THE NEXT FEW DAYS. THIS WILL CREATE VERY HOT TEMPERATURES OVER MOST OF THE AREA. HIGHER THAN NORMAL HUMIDITIES WILL BRING NEAR CRITICAL HEAT INDEX VALUE LEVELS ON THURSDAY. HIGH TEMPERATURES EXCEEDING 100 DEGREES ARE LIKELY OVER MUCH OF THE COASTAL VALLEYS AND AT LOWER MOUNTAIN ELEVATIONS. ACROSS INTERIOR SECTIONS OF THE COASTAL PLAIN HIGH TEMPERATURES WILL LIKELY REACH THE MID 90S TO NEAR 100. THE COMBINATION OF THE HOT TEMPERATURES AND HUMID AIR MASS COULD ALLOW FOR HEAT INDEX VALUES TO APPROACH CRITICAL LEVELS. HEAT INDEX VALUES WILL SOAR TO NEAR 105 DEGREES IN SOME VALLEY LOCATIONS THURSDAY AND TO NEAR 100 IN SOME FOOTHILL LOCATIONS. TEMPERATURES WILL START TO COOL ON FRIDAY AS MONSOONAL MOISTURE INCREASES CLOUD COVER FOR LATE WEEK BUT THE AIR MASS WILL STILL FEEL HUMID. A STRONGER MONSOON FLOW IS COULD DEVELOP BETWEEN THURSDAY NIGHT AND FRIDAY AND CONTINUING INTO THE WEEKEND. THIS WILL ALLOW FOR A CHANCE OF THUNDERSTORMS OVER THE MOUNTAINS AND ANTELOPE VALLEY. BUT THERE IS AN OUTSIDE CHANCE THAT THE SHOWER AND THUNDERSTORM ACTIVITY COULD SPILL OVER INTO THE VALLEYS AND COASTAL PLAIN. THUNDERSTORMS COULD PRODUCE BRIEF AND LOCALLY HEAVY RAINFALL GUSTY WINDS AND DANGEROUS CLOUD-TO-GROUND LIGHTNING. PERSONS PLANNING OUTDOOR OR RECREATIONAL ACTIVITIES LATE THIS WEEK AND THROUGH THIS WEEKEND IN THE AREA ARE ADVISED TO MONITOR THE LATEST FORECASTS. PLAN OUTDOOR ACTIVITIES DURING THE COOLER PARTS OF THE DAY BUT REMEMBER WHEN THUNDER ROARS GO INDOORS. HEAT FLOODING AND LIGHTNING ARE AMONG NATURES DEADLIEST KILLERS.
Posted on: Thu, 29 Aug 2013 14:46:07 +0000
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