PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
725 PM PDT MON SEP 27 2010
...IT WAS A SCORCHING SEPTEMBER DAY ACROSS MUCH OF SOUTHWESTERN
CALIFORNIA...
THE COMBINATION OF UNSEASONABLY STRONG HIGH PRESSURE ALOFT AND WEAK
OFFSHORE LOW LEVEL FLOW MADE FOR AN EXTREMELY HOT DAY ACROSS MUCH
OF SOUTHWESTERN CALIFORNIA TODAY. THE HIGHEST TEMPERATURES...
GENERALLY BETWEEN 110 AND 113 DEGREES...WERE FOUND ACROSS INTERIOR
SECTIONS OF THE COASTAL PLAIN AND IN THE COASTAL VALLEYS...WHERE
COMPRESSIONAL HEATING OF THE AIR AS IT DESCENDED INTO LOWER
ELEVATIONS OF THE ATMOSPHERE ADDED A FEW DEGREES TO THE
TEMPERATURES. THE TEMPERATURE REGIME TODAY WAS FAIRLY TYPICAL
OF WEAK OFFSHORE FLOW PATTERNS...WHERE THE HIGHEST TEMPERATURES OFTEN
OCCUR IN THE LOWER VALLEYS AND ACROSS INTERIOR SECTIONS OF THE
COASTAL PLAIN WHERE THE SEA BREEZES ARE DELAYED. HOWEVER...THE
INTENSITY OF THE HEAT TODAY WAS RATHER EXTREME...RESULTING IN MANY
RECORDS FOR THE DATE...AS WELL AS SOME MONTHLY AND SOME ALL-TIME
RECORDS.
At 113 degrees, downtown L.A. hits all-time record high [Updated]
September 27, 2010 | 1:24 pm
It's not just you. Monday turned out to be the hottest day ever recorded -- at least in downtown L.A.
At 12:15 p.m., the weather station at USC hit the 113-degree mark, breaking the old all-time high of 112 set on June 26, 1990.
It makes Monday the hottest day ever since records in downtown L.A. started being kept in 1877, said Stuart Seto of the National Weather Service.
Seto said the record was impressive, "especially after such a cool summer."
Shortly after reaching the record, the temperature dipped back to 111, and then climbed back to 112. Then at 1 p.m., the thermometer stopped working.
The weather service office in Oxnard rushed an electronics technician 60 miles southeast to the USC campus to repair the thermometer, which is actually a highly sensitive wire connected to electronic equipment. Because of the snafu, officials said it's possible Monday's temperature actually was hotter than 113 — but they might never know.
As of noon, Weather.com reported that Santa Monica had hit 106, West Hollywood was at 111, and Long Beach was at 107.
The National Weather Service warned of extreme heat and red-flag fire dangers Monday. A small fire broke out in Ladera Heights but was quickly put out. Another small brush fire was contained Sunday night in South Pasadena.
spwill wrote:Death Valley California has an average July max of 45.7C, I have driven through Death Valley mid summer in a car with no air conditioning.