2012: Thunderstorms developed over the Southern Sierra Nevada and the eastern Kern County desert during the afternoons of August 21st and 22nd. Over 300 lightning strikes were recorded over the Southern Sierra Nevada—mainly near the crest—during the early morning hours of the 22nd, as an upper level low-pressure system moved across central California.
Later on August 22nd, as an upper-level low traversed Kern County, a funnel cloud was observed over Ridgecrest during the late afternoon, followed by the development of a very strong thunderstorm near Randsburg less than an hour later.
Outflow boundaries from thunderstorms over southeastern Tulare County, southern Inyo County and northwestern San Bernardino County collided to form the equivalent of a standing-wave node just north of Randsburg.
This kept the thunderstorm stationary as it strengthened, resulting in very heavy localized rainfall. Flash flooding closed U.S. 395 from near Randsburg north to the Garlock Road as several inches of water flowed across the roadway.
Later that evening, runoff from rain falling on the El Paso Mountains produced minor mud and rock slides on the Red Rock-Randsburg Road.
2012: During the late morning hours of August 22, 2012 exceptionally heavy rain fell from thunderstorms over the southern half of the Las Vegas Valley, especially from McCarran International Airport south and east. Widespread rainfall totals of 1-2" with isolated higher amounts were observed in the southern half of the Las Vegas Valley, with most of this falling in about a 3 hour period.
McCarran International Airport measured 1.65", which ranks as the second wettest calendar day ever in Las Vegas dating back to 1937.
A total of 3.15" was measured at a Clark County Regional Flood Control District weather station at the Las Vegas Wash at the Pabco Road grade control structure.
Numerous roads throughout the southern half of the Las Vegas Valley were flooded, many with several feet of water along with vast quantities of mud and large rocks.
The first report of flash flooding in the Las Vegas Valley was at 1045 AM PDT in the Spring Valley neighborhood.
More significant flooding took place in Henderson just after 1100 AM PDT, with a number of roads being closed.
Even portions of Las Vegas Boulevard were flooded including on The Strip. Many vehicles became immersed in floodwaters, including a number that were parked in low lying areas.
At least 6 swiftwater rescues were conducted in the Las Vegas Valley by first responders.
A church suffered over $500,000 in damages after 3 feet of floodwaters entered it.
Washes swelled with rapidly flowing water.
A 17 year old boy was found dead after he fell into a wash near Stephanie and Sunset in Henderson and was swept miles downstream toward the Las Vegas Wetlands Park on the east side of the Las Vegas Valley.
2007: Dry conditions combined with hot temperatures and gusty winds generated several wildfires across south-central California during August. The "Vista" fire was ignited on the 22nd by unknown causes.
The size was 420 acres, and it was located 2 miles east of Sherman Pass in Tulare County.
It was contained on the 26th.
This fire cost $1,250,000 to fight, but did not cause any injuries or property damage.
1982: Reno, NV had a high temperature of 101° F.
1972: It was 105° F at Santa Barbara and 98° F in Idyllwild, their highest temperatures on record for August.
1970: Thunderstorms dropped up to 2" of rain and kidney sized hail in Las Vegas.
4 feet of water rushed down Mohave Avenue and lightning took 6 feet of bark off a tree.
1969: Palo Alto had a high temperature of 89° F.
1969: Heat descended upon the region.
1969: Heat descended upon the region.
The inland valleys and lower elevation mountain areas felt the brunt of the warm conditions with afternoon highs reaching 100° - 110° F.
Cuyamaca set a record for the month of August with an impressive afternoon high of 110° F.
1968: An unseasonably deep and cold low pressure trough descended upon Southern California.
1968: An unseasonably deep and cold low pressure trough descended upon Southern California.
It was 31° F in Big Bear Lake, making this day the earliest date in the season to reach freezing temperatures.
It was 27° F in Idyllwild, the lowest temperature on record for August.
1952: Downtown Bakersfield suffered significant damage from a 5.8 earthquake.
Many buildings were damaged and 2 people died.
Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, & San Diego
It was 27° F in Idyllwild, the lowest temperature on record for August.
1952: Downtown Bakersfield suffered significant damage from a 5.8 earthquake.
Many buildings were damaged and 2 people died.
1903: All-time August record low for Bakersfield set, 44° F.
Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, & San Diego
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