2017: A persistent large upper ridge centered over the Great Basin provided the Central Valley, Southern Sierra, and High Desert areas with an extended period of much warmer than normal temperatures between August 26 and September 3.
High temperatures ranged mainly from 106 to 112 degrees at many locations each day between August 26 and September 3 across the San Joaquin Valley, the southern Sierra foothills and the Kern County Deserts while morning lows ranged from the mid 70's to the lower 80's.
2015: A monsoonal thunderstorm-generated flash flood led to a swift-water rescue operation at Highway 62 and Godwin Road in Wonder Valley east of Twentynine Palms.
2014: A large southerly swell from Hurricane Marie produced surf of 15 to 18 feet from Newport Beach to Huntington Beach from this day to 8/28.
The Wedge at Newport Beach had sets of 25 to 30 feet.
Coastal flooding occurred at Seal Beach on this day, and reached into some homes.
South Laguna Beach reported major beach erosion.
The Wedge at Newport Beach had sets of 25 to 30 feet.
Coastal flooding occurred at Seal Beach on this day, and reached into some homes.
South Laguna Beach reported major beach erosion.
2010: The combination of an approaching upper level disturbance that moved across Southern California and a moist and unstable air mass over the Mojave Desert and Southern Great Basin resulted in scattered showers and thunderstorms developing in the late morning on this date.
In Barstow, dime-sized hail fell and lightning struck a house causing $2,000 in damage with reports elsewhere in town of water running across streets and depositing debris.
Reports of 3-4 feet of mud washed onto Highway 395 13 miles south of Olancha at Dunmovin in Inyo County which closed the highway for the remainder of the day.
A thunderstorm outflow boundary generated wind gusts to 60 mph in Amboy in San Bernardino County.
2010: Powerful thunderstorms hit Wrightwood and Warner Springs with heavy rain and flash floods.
1" diameter hail struck Sunshine Summit near Warner Springs.
A Severe thunderstorm developed near Hemet and moved southwest along the "Elsinore Convergence Zone" to Lake Elsinore.
The storm produced marble size hail, heavy rain, and downburst winds that downed trees up to 2 feet in diameter.
2009: Intense drought helped the Station Fire start and expand rapidly in the Angeles National Forest north of Los Angeles.
The fire proved difficult to contain, burning intensely through the middle of September.
It consumed 160,557 acres, 89 residences, killed 2 firefighters and cost more than $90 million dollars to fight on its way to becoming the 10th largest wildfire in modern California history and largest wildfire in L.A. County history.
2007: Remnants of Hurricane Dean produced thunderstorms and heavy rain all over the San Diego Metro area in the morning, then in the afternoon in the Anza Borrego Desert.
In Escondido nearly 2" fell in less than 90 minutes in the morning.
That afternoon, flash flooding occurred near Borrego Springs and Ocotillo Wells, rendering several roads impassable.
Several park visitors were trapped near the Borrego Badlands.
2003: A flash flood from a stationary thunderstorm just south of Twentynine Palms swept a car off the road killing two people inside the car and a Good Samaritan who tried to rescue them.
2003: The Mariposa Lightning Series of fires were battled by the California Department of Forestry and Fire Protection starting on the 26th and contained by the afternoon of the 27th.
There were three notable locations in this series: a fire of 77 acres was located in Catheys Valley; another of 640 acres at the Mariposa-Madera County line 13 miles SSW of Catheys Valley; and yet another of 100 acres at Road 200 and Fine Gold Creek Bridge.
The cost to fight this series of fires was not reported but no fatalities occurred as the result.
2003: Another surge of monsoonal moisture from the remnants of Hurricane Ignacio brought thunderstorm activity to the deserts and higher terrain of Interior Central California.
With east to southeast wind flow aloft, thunderstorms developed and moved over the Central and Southern San Joaquin Valley early on the morning of the 26th.
Many lightning strikes again occurred.
Infrequently occurring, the Central San Joaquin Valley began taking lightning strikes by 0200 PST and continuing heavily from Mariposa County south through Madera County and west to Merced County through 0430 PST. Additional lightning activity began in earnest on the west side of Fresno County at 0430 PST with a pocket of lightning activity in the Bakersfield Metropolitan area near dawn.
Over 300 lightning strikes occurred in the 6-county area of Interior Central California from 0400 to 0500 PST alone.
Merced County fire crews responded to over 14 lightning-caused fires on the Valley floor and resulted in loss of power to over 3,500 customers in the Merced/Atwater area.
2003: Measurable rain (0.04") fell in Fresno.
Only 18 Augusts have seen measurable rain fall in Fresno since the start of records in 1887.
2003: Thunderstorms developed in the mountains each day starting on 8.25 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.
2000: A strong dust devil spun through a demolition site in Yucca Valley, causing a roof collapse that injured 1 person.
1999: Gusty wind associated with a southwest-to-northeast outflow winds passed through Central California during the late afternoon hours of the 26th. Radar echoes were generally less than 40 dBz and minimal reports of any thunderstorm activity.
These outflow winds from the "frontal" band caused damage from the Southern through the Central San Joaquin Valley with the hardest hit area around Kingsburg and Reedley in Southern Fresno County.
Numerous trees and powerlines were downed, especially in the Kingsburg area.
About 5,000 power customers went without power until 2:00 AM in the morning.
The peak wind speeds observed appeared to be around 33 MPH but it is felt there were higher gusts along the band.
The peak wind at the Fresno Air Terminal occurred at 1727PDT with the damage in Kingsburg around 1640 PDT.
1993: Rain and thunderstorms developed from the remnants of Hurricane Hilary on 8.25 and ended on this day.
3"- 4" of rain fell in 2 hours from heavy thunderstorms in the San Bernardino Mountains, Morongo Valley, and Desert Hot Springs.
Flash flooding occurred in Yucaipa and Morongo Valley.
1970: China Lake NAS ended a 47 day stretch with highs of 100° F or better, the longest such streak on record.
1970: Strong thunderstorms developed in the Inland Empire and over Mojave Desert.
Flash flooding brought traffic to a halt and damaged several major highways. Lightning also started several small brush fires.
1968: Paso Robles reached an overnight low of 37° F, establishing a new record low for the month.
1951: A hurricane came ashore on the Baja peninsula southwest of Yuma, AZ, on 8.24.
Over the next four days it dropped prodigious amounts of rain over parts of central Arizona causing widespread flooding damage.
Damage in 1951 dollars exceeds $750,000.
1935: The remains of a tropical cyclone affected the region over a five-day period, with the remnant low making landfall near Point Conception on this day.
Rainfall was widespread but not particularly heavy.
Riverside reported the largest total with 2.04" over five days.
1924: Reno, NV recorded a high of 99° F.
1915: The remnants of a tropical cyclone moved northward across northern Baja California into the valleys, mountains and deserts of southern California.
Julian reported 1.73" of rain while Riverside measured 1.01".
This occurred during the strong El Niño of 1914-15.
1893: San Jose had a low temperature of 39° F.
Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, Phoenix, and San Diego
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