2013: Remnants of Tropical Storm Ivo impacted the Southern California deserts for a second day.
Heavy rain and flash flooding were the main impacts on this day.
Hardest hit areas included Borrego Springs and the Coachella Valley, were numerous roads were flooded and impassable.
Hardest hit areas included Borrego Springs and the Coachella Valley, were numerous roads were flooded and impassable.
2013: Very heavy rain fell in the northeast portion of the Spring Mountains near the northern end of Kyle Canyon Road between 1:30 and 6 PM.
Radar estimated precipitation from the KESX radar at Nelson Peak, Nevada estimated as much as 8 to 10 inches of rain fell just east of Kyle Canyon Road.
An automated gauge operated by the Clark County Regional Flood Control District, which was not in the area where the heaviest rain total was estimated by the radar, measured a storm total of 4.10 inches.
Some of the heavy rain that fell occurred on the Carpenter 1 Fire Burn Area as well as in an area where the water drains down into the Las Vegas Valley.
The combination of runoff from the heavy rain as well as a debris flow from the rain that fell on the Carpenter 1 Fire burn area resulted in runoff that lasted for 3 days into the far northwest part of the valley.
Highway 95 was closed at Horse Drive and portions of the northern end of Kyle Canyon Road were washed out completely.
A total of 18 swift water rescues took place, including 2 on Kyle Canyon Road.
The water that flowed down from Mt. Charleston contained a mixture of water, mud, debris and even foam left from the firefighting efforts of the Carpenter 1 Fire that flowed into the Kyle Canyon Detention Basin.
An estimated 70 acre feet of sediment and debris was captured by the basin according to the Clark County Regional Flood Control District.
However, natural drainage flow allowed some water, mud, debris and foam to wash onto roads in the far northwest part of Las Vegas, mainly Grand Teton Drive from near Hualapai to Rainbow.
In addition, 1 to 2 inches of rain fell from Centennial Hills to Aliante, and this rain combined with runoff from the Spring Mountains also helped to trigger local street flooding.
Almost all local roads in this area were covered with water, rocks and mud, even where not impacted by the Carpenter 1 Fire Burn Area debris flow.
In the Aliante area, the flooding was described as the worst since this area was built in the mid 2000s.
Many walkway paths were inundated and the parking lot at an apartment complex was filled with 3 to 6 inches of standing water in a large area.
Damages were estimated at 3 million dollars, mainly to roads.
2010: Powerful thunderstorms hit Forest Falls and Hemet with heavy rain and flash
floods.
0.5" of rain fell in 8 minutes on Yucaipa Ridge.
Strong thunderstorm winds estimated at 60 mph struck Lake Elsinore.
Power poles were knocked down, trampolines were thrown.
Live power lines trapped a bus full of people.
0.5" of rain fell in 8 minutes on Yucaipa Ridge.
Strong thunderstorm winds estimated at 60 mph struck Lake Elsinore.
Power poles were knocked down, trampolines were thrown.
Live power lines trapped a bus full of people.
2010: A strong high pressure ridge allowed temperatures to rise to warmest values for
the entire summer thus far; record maximum temperatures were either tied or broken for this date
at all five ASOS locations.
2008: A severe thunderstorm developed over Baja California and produced damaging microbursts as it moved north over Campo.
Measured wind speeds were 52 mph, but estimated winds were at least 58 mph.
Trees were downed in Campo.
Nickel sized hail fell from a severe thunderstorm just northwest of Ranchita.
2003: Monsoonal moisture produced thunderstorms late on the 25th that produced over an inch of rain in some areas, including the Valley.
1.68" fell at Cottonwood Creek in the Sierra and 1.48" fell at Lost Hills (Kern Co.) in the (Central) Valley.
Roads were closed in parts of Sequoia National Park and in the Kern Plateau.
2003: Thunderstorms developed in the mountains each day starting on this day and ending on 8.27.
Flooding closed Hwy. 38 in Big Bear City, roads near Guatay, routes S2 and S22 near Ranchita, Hwy. 78 east of Julian (from rock slides and mud slides) and streets in Borrego Springs and Campo.
0.75" hail fell at Big Bear City.
2000: A funnel cloud came within 200 feet of the ground in Jacumba (San Diego Co.).
1998: A small tornado was caught on videotape approximately 5 miles southwest of Nipton, California.
At about the same time, a hood was reportedly ripped off a dump truck in the same vicinity and a truck was blown off Interstate 15 near Highway 164 (Nipton Road).
The slow moving severe thunderstorm responsible for the tornado also produced an estimated 4"-5" of rain over the same area.
Serious flash flooding resulted as reported by the California Highway Patrol.
Several cars were stranded by flood waters and some were swept off the Nipton Road near Interstate 15.
Large rocks, trees, debris and water blocked Highway 64 between Nipton and Interstate 15.
1993: Rain and thunderstorms developed from the remnants of Hurricane Hilary on this day and ended on 8.26.
3"-4" of rain fell in two hours from heavy thunderstorms in the San Bernardino Mountains, Morongo Valley, and Desert Hot Springs.
Flash flooding occurred in Yucaipa and Morongo Valley.
1988: Monterey had a high temperature of 87° F.
1965: It was 29° F in Big Bear Lake, the lowest temperature on record for August.
1959: High winds from a thunderstorm toppled a concrete block building under construction and tore the roofs of buildings in Henderson, NV.
1949: Stretch of 21 days in a row with below average temperatures in Fresno comes to an end.
1935: A tropical cyclone tracked northward across southern and central Baja California.
The remnants spread into Arizona generating rainfall of up to 2" in the southern valleys, mountains, and deserts.
1924: The high temperature at Reno, NV was 99° F.
Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, & San Diego
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