1999: Thundersnow occurred in the high Sierra around 11,500 feet in elevation, about 18 miles northeast of Huntington Lake.
1978: The low temperature was 78° F in Palomar Mountain, the highest minimum temperature on record.
This also occurred on 7.11.2003 and on 6.29.1994.
1963: A heavy thunderstorm struck Lenwood and Barstow.
In Lenwood a boy was swept 200 feet by a flash flood before clinging to a telephone pole.
The same flash flood carried a loaded trailer 150 feet off the highway.
1956: Monterey had a low temperature of 45° F.
1941: Thunderstorms hit the eastern Coachella Valley damaging buildings.
Water was 30" deep in Mecca after more than 3" of rain fell.
1.46" fell in Indio.
1935: It was 105° F in Santa Ana, the highest temperature on record for August.
1933: A heat wave began on this day and ended on 8.13 in the valleys; temperatures topped 110° F for several consecutive days.
Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, & San Diego
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3" to 4" of snow fell in association with this storm.
1997: In addition to strong winds and large hail, redeveloping severe thunderstorms produced heavy downpours which resulted in severe flash flooding in southeast Las Vegas, NV.
In Henderson, NV, raging flood waters turned roads into rivers up to three and four feet deep.
Water and mud slides closed many roads, including U.S. Highway 95, for several hours.
One man was drowned when a strong current swept him under his vehicle as he tried to move it off his neighborhood street.
Rescue workers performed a number of swift water rescues until as late as 8:30 pm PST.
Four people were hospitalized.
Flooding also resulted in the release of titanium dioxide gas (non-toxic) at the TIMET plant.
Officials from Henderson report 5 million dollars in flood damage.
In all, 83 homes and 10 businesses were damaged prompting the Governor to declare Henderson a disaster area.
Boulder City, NV, and the nearby Lake Mead National Recreation Area were also hit hard by heavy rain producing thunderstorms.
Water and debris swept across Highway 93, between Railroad Pass and Boulder City, taking several vehicles off the road but sparing all occupants from injury.
Flood waters also eroded roads, drainage canals and damaged many buildings in Boulder City.
One man almost drowned in a drainage culvert but was rescued and hospitalized.
The storms and floods ravaged the west side of Lake Mead battering marinas, eroding beaches and washing out roads.
The recreation area was closed by 1:25 pm PST as access to Heminway Launch, Boulder Beach and Lake Mead Marina was cut off by flooding. Over 500 people were held captive within the park until the flood waters subsided. Damage was estimated at over one million dollars for Lake Mead and about 3.4 million dollars for Boulder City.
The Governor declared Boulder City a disaster area along with Henderson.
Intense thunderstorm winds pummeled Boulder City uprooting and snapping numerous trees.
The golf course alone reported 40 trees down.
The Boulder City airport recorded a peak wind gust of 91 mph.
1989: Flooding on Olancha Creek in the Owens Valley of California filled the Los Angeles Aqueduct with mud and debris for a two mile stretch.
Large boulders were carried by the flood waters into the Aqueduct and the concrete walls buckled and gave way under force from water from outside the channel.
Eight 10 by 14 foot concrete panels that make up the walls of the Aqueduct had failed or been damaged.
Water again crossed Highways 395 and 190 and the roads were closed. Motorists stranded by the floodwaters were evacuated by the Inyo County Sheriff's Office.
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 this day.
1983: 4" of rain fall on the Flamingo Wash watershed in Las Vegas, NV.
Several days after the flash flood, a child dies when soil that had been carried off collapses.
Damage is estimated at $3 million.
This also occurred on 7.11.2003 and on 6.29.1994.
1970: San Luis Obispo dropped to an overnight low of 40° F setting a record low for the month.
1970: Reno, NV had a high temperature of 103° F.
1963: A heavy thunderstorm struck Lenwood and Barstow.
In Lenwood a boy was swept 200 feet by a flash flood before clinging to a telephone pole.
The same flash flood carried a loaded trailer 150 feet off the highway.
1956: Monterey had a low temperature of 45° F.
1941: Thunderstorms hit the eastern Coachella Valley damaging buildings.
Water was 30" deep in Mecca after more than 3" of rain fell.
1.46" fell in Indio.
1935: It was 105° F in Santa Ana, the highest temperature on record for August.
1933: A heat wave began on this day and ended on 8.13 in the valleys; temperatures topped 110° F for several consecutive days.
Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, & San Diego
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