Monday, July 29, 2019

[CaliforniaDisasters] On This Date In California Weather History (July 29)

2011: A thunderstorm that developed over Mt. Whitney, CA in the afternoon hours unleashed heavy rain on the area.
Due to the above normal snowpack in the Sierra Nevada during the past winter, the combination of snow still on the ground as well as moist soil conditions, when the heavy rain fell on the snow and moist soil it triggered runoff resulting in a significant amount of water and mud running down the Mount Whitney Trail.
This water and mud then ran into the Whitney Portal Campground and later in the evening and further downhill towards the Owens Valley community of Lone Pine where water crossed Highway 395.
The Mount Whitney Trail was inundated with a torrent of water and mud.
One wooden bridge that crosses Lone Pine Creek near the Whitney Portal Campground was overtopped by the creek's surging water.
The Whitney Portal Campground was filled with water and mud up to waist deep resulting in the closure of it.
Park Rangers from the Inyo National Forest reported that 25 to 30 day hikers were estimated to have been stranded in the area.
Search and Rescue Operations were being conducted by Inyo and Kern County from Friday night through at least Saturday morning.
One hiker was rescued at 7:15 AM Saturday morning with severe hypothermia and was taken to a hospital for treatment.
Whitney Portal Road was first reported flooded at 6:00 PM by Inyo County. Flooding on lower portions of the road, closer to the community of Lone Pine were reported at 8:38 PM.
Highway 395 was reported to have water across it in Lone Pine around this time.

2006: An intense heat wave arrived in the region, helping already well above sea surface temperatures (SSTs) spike to unprecedented levels.
Huntington Beach reported a water temperature of 80° F!
Several points off the coast also reported 80° F SSTs at the end of July.
Records of SSTs are limited by nature, but this is the only known occurrence of 80° F water temperatures in the SoCal Bight.

2003: Bakersfield set a record high minimum of 86° F.

1995: A heat wave started on 7.27 and ended on this day. It was 123° in Palm Springs on 7.28 and on this day.
On 7.27 it was 120° F in Coachella, 118° F in Palm Springs, 113° F in San Jacinto, 112° F in Riverside, 111° F in Banning, Moreno Valley, and Sun City, and 110° F in Yucaipa.

1980: U.S. Forest Service reported a small tornado near Oak Grove (east of Palomar Mnt.).
The tornado tracked across open country causing minimal damage.

1977: Salinas had a high temperature of 95° F.

1972: During a stretch from 7.28 to 7.30, the temperature rose each day to 100° F in Palomar Mountain.
It is the highest temperature on record and has been reached on nine days.

1968: 0.33" of rain fell in Riverside, the greatest daily amount on record for July.

1958: Moisture from a west northwestward moving tropical storm which dissipated west of central Baja California generated up to 2" of rainfall in the deserts and mountains starting on 7.28 and ending on 7.30.
This occurred during the El NiƱo of 1957-58.
On this day a thunderstorm hit the Barton Flats and Forest Home (now Forest Falls) area with 2" of rain.
Several walls of mud rolled off fire-denuded hills onto the road in several places along the highway in Barton Flats and Forest Home.
Five cars were trapped.

1943: The high temperature at Reno was 103° F.

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

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