Wednesday, July 20, 2011

[californiadisasters] On This Date In California Weather History (July 20)



On This Date In California Weather History...

2008: A rare early morning thunderstorm hit the Coachella Valley.
On the edge of the storm in Cathedral City, 1.25 inches fell in 30 minutes.
15 to 20 businesses and several homes were damaged at a trailer home park.
Highway 111 was closed because of mud and rocks.

2006: A thunderstorm tracked across the southwestern portion of Yosemite National Park during the afternoon hours knocking down trees and power lines at El Portal and as well as downing trees along the Wawona Highway.
In the Kern County desert, a thunderstorm trekked through in the late afternoon hours causing trees and power lines to fall and even blowing out car windows.

1998: Heavy thunderstorms caused flooding at Mission Beach and at Barton Flats in the San Bernardino Mountains.
Lightning sparked at least five fires in San Diego County.
Strikes also hit a Clairemont home, and two trees in Pacific Beach.
Lightning also caused a few power outages.

1987: A rare cold air mass for mid-summer descended on the region starting on 7.18 and ending on 7.21 and broke numerous low temperature records.
It was 39° in Palomar Mountain, the lowest temperature on record for July.
This also occurred two days previous on 7.18 and on the next day 7.21.

1979: Thunderstorms hit Southern California, especially hard in the Coachella Valley and surrounding mountains.
1.92 inches of rain fell in Idyllwild and 1.29 inches fell in Borrego Springs, each the greatest daily amount on record for July.
2.50 inches fell in Palm Springs, 1.10 inches fell in Palomar Mountain and 1.09 inches fell in Big Bear Lake.
Around Palm Desert and Rancho Mirage a debris flow killed one and caused $7 million damage.
Flash flooding hit hundreds of homes in Rancho Mirage, Palm Desert and La Quinta.
Some residents were swept out of their homes during the night.

1974: A tornado in Hemet caused property damage.

1956: A flash flood in northwest Reno, NV, destroyed homes and flooded businesses.

1931: Both Reno, NV, and Carson City, NV, recorded high temperatures of 106.
Tahoe City registered its all-time record high temperature for the month of July with a reading of 93.

1915: An all-time high temperature of 115 degrees was recorded at Yosemite Valley at the National Park Headquarters (around 4,000 feet in elevation).
This was the warmest day in a streak of 7 consecutive days of 110 degrees or better at Yosemite Valley that extended from July 19th through the 25th.

1905: The high temperature at Lovelock, NV, was 107.

Source: NWS Hanford, Reno, & San Diego

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