A "dangerous heat wave'' will maintain its grip over the Southland today, sending valley temperatures past the century mark, but the humidity will be lower than forecast, meaning the heat won't be quite as oppressive as had been expected, forecasters said.
The National Weather Service forecast highs today of 80 in Avalon; 81 in Newport Beach and at LAX; 89 in Long Beach; 91 in downtown L.A.; 94 on Mount Wilson; 97 in Anaheim; 98 in San Gabriel; 100 in Burbank; 101 in Pasadena; 107 in Woodland Hills and Saugus; 108 in Palmdale; and 109 in Lancaster.
The heat wave -- both daytime highs and overnight lows are running several degrees above normal -- will persist through the weekend.
Temperature highs will climb down by a couple of degrees on Sunday, but
no cooling trend will get underway in earnest until Monday, when highs are
expected to be around five degrees lower than today, according to an NWS
"Strong high pressure over the southwestern portion of the United States combined with weak onshore flow will push daytime temperatures well above 100 degrees across inland areas this week,'' an NWS advisory said this morning.
"The warmest locations will be in the western San Fernando Valley, Santa Clarita Valley and the Antelope Valley, where highs between 105 and 110 are expected.''
But the NWS this morning cancelled an excessive heat watch that had been
issued for much of the region, saying the humidity will be lower than had
Maximum daytime heat index values are now forecast to remain just below heat warning levels over the next three days,'' the weather service said in an advisory. "The lack of humidity will keep heat index values less than the actual air temperature.''
Nonetheless, "This is still a dangerous heat wave, which will last through the weekend,'' according to the advisory.
"Persons living or traveling to the valleys, mountains and the deserts need to take proper heat precautions. Stay out of direct sunlight, drink plenty of water and limit physical exertion during the afternoon and early evening.''