2001: A strong thunderstorm in Twentynine Palms caused property damage.
1989: Truckee recorded 1.21" of precipitation.
1989: One of the most severe convective outbreaks of record in Southern California began on 8/7 and continued until 8/11, when it climaxed.
1989: Truckee recorded 1.21" of precipitation.
1989: One of the most severe convective outbreaks of record in Southern California began on 8/7 and continued until 8/11, when it climaxed.
Over 1" of rain hit Idyllwild on 8/9 and more than a 0.50" fell on Palm Springs on 8/10.
1989: Three days of widespread monsoon activity, on a level that hadn't been seen in SoCal and the Mojave Desert for several years, began.
The highest wind gust ever recorded in Las Vegas occurred on this date.
Winds gusting to 90 mph were recorded at McCarran International Airport which received most of the damage.
Forty two airplanes were damaged at McCarran while another 22 aircraft were damaged at Sky Harbor Airport in Henderson.
Damage estimates reached $14 million. Also on this date, the most impactful storm occurred just west of Death Valley. Runoff from thunderstorms in the mountains resulted in two feet of mud to wash onto Highway 395 near Lone Pine, CA closing the highway for 12 hours.
Just north and south of the junction of Highways 395 and 190, runoff from mountain thunderstorms covered the highways with water and mud.
Flash Flood debris also found its way into the Los Angeles Aquaduct, producing a dam of debris that extended for nearly a mile.
1981: The high temperature at Portola was 107° F.
1981: It was 92° F in Big Bear Lake, the highest temperature on record for August.
This also occurred on 8.25.1985 and on 8.29.1974.
1975: Mount Hamilton hit its all-time record high of 103° F.
1970: It was 100° F in Palomar Mountain, the highest temperature on record.
This also occurred on eight other days.
1967: Las Vegas was hit by two storms which bore in from the south and covered a 50-square-mile area.
Damage was estimated in the hundreds of thousands of dollars.
The Showboat Hotel on Boulder Highway was forced to close its casino, restaurant, and showroom when muddy floodwaters invaded through the kitchen doors, passed clearly through the large building and out the front doors.
At Caesars Palace on the Strip, a casino boss said the water was deep enough in the front of the hotel to "swim in".
1965: A sudden thunderstorm dropped "several inches of rain" on the foothills south of Lucerne Valley.
A flash flood covered a 50 foot wide canyon floor with 4' of water.
21 members of the Riverside Jeep Club were stranded as the club was in the canyon at the time.
Three jeeps were demolished, one being swept 300 foot down the canyon.
1963: A heavy thunderstorm struck Victorville - Desert Knolls with 1.67" in two hours and Victorville with 0.81".
No deaths or injuries occurred in the flash floods, but there were rescues of motorists.
Some flooding was three feet deep in Apple Valley, 4-5 feet deep on Old Woman Springs Road.
1947: A heavy thunderstorm struck Needles, causing damage to highways and railroads, including Highway 66 (Old Route 66).
1936: The remnants of a tropical cyclone brought widespread light rain to the coast and valleys of Southern California; no major issues were reported.
1908: Fresno reached 113° F, tying an all-time record high for the month of August set on August 11, 1898.
Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, & San Diego
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