Friday, July 6, 2018

[californiadisasters] On This Date In California Weather History (July 6)

2015: Monsoon thunderstorms hit the mountains and upper desert.
A few spots
received up to around 1/3", including a portion of the Lake Fire burn area south of Big Bear Lake.
Several debris flows resulted, including one consisting mostly of ash and mud over portions of Highway 38, up to a foot deep in some areas.

2011: Deep monsoonal moisture and an old Mesoscale Convective Vortex (MCV) interacted to produce intense thunderstorms over inland areas.
Severe thunderstorms produced downbursts with 50-60 mph winds in Perris and Phelan, damaging trees, powerlines and several homes.

A major heat wave struck the mountains and deserts from 7.2 to this day.
A strong persistent marine layer precluded the heat wave from impacting the coasts and valleys.
During this time the temperature reached 119° F in Ocotillo Wells, 116° F in Palm Springs and Indio, 115° F in Anza Borrego, 107° F in Julian, 103° F at Lake Cuyamaca, 100° F at Idyllwild, 97° F at Palomar Mountain, 94° F at Big Bear Lake (tied all time high) and Mt. Laguna.
Some heat illnesses occurred, but were poorly documented.

2007: The high temperature at Boca (near Truckee) was 100° F.

Heavy rain from thunderstorms produced 1.38" of rain in an hour in Jean, NV (CA-NV border).
Significant flooding of area roads was noted.
Heavy rain in Las Vegas, NV, also made several roads impassable.

Monsoon thunderstorms in the deserts resulted heavy rains and flash
Borrego Springs received 0.75" of rain in 20 minutes and blowing dust produced near zero visibility.
In the Coachella Valley, Highway 86 was washed out and the American Canal overflowed into a nearby elementary school causing more than $1 million in damage.

1985: Lightning started a wildfire along the Big Sur Coast.
The Gorda-Rat wildfire consumed more than 56,000 acres.

1980: It was 40° F in Pismo Beach, setting an all-time low for July.

1963: It was 28° F in Big Bear Lake, the lowest temperature on record for July.

1955: Fresno tied its' all-time record low minimum for the month of July of 50° F.

1950: A heavy thunderstorm erupted over the Yucaipa Ridge area.
The rain fell on denuded slopes from a 640 acre wildfire on 6.30 in Oak Glen.
Mud and debris flowed into Yucaipa.

1948: It was 44° F overnight in Santa Barbara, setting an all-time low for July.

1912: Low of 32° F in Yosemite Valley, an all-time record low for the month of July.

Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, & San Diego



Posted by: Kim Noyes <>

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