On This Date In California Weather History....2007: A severe thunderstorm in Lake Elsinore produced severe winds, which downed trees, power lines and caused roof damage.
Another heavy thunderstorm hit Wrightwood and produced a debris flow that damaged roads along Sheep Creek and trapped motorists.
This was the first of three consecutive days (also 9.1 and 9.2) of flash flooding in Wrightwood.
Other thunderstorms dropped a blanket of hail over vast areas between Big Bear Lake and the San Gorgonio Wilderness.
A significant accumulation of small hail was seen for many days at the top of Mt. San Gorgonio.
1998: Strong thunderstorms developed each day starting on 8.29 and ending on this day.
1.5 inches of rain fell at Apple Valley, 0.77 inch fell in only 45 minutes at Wrightwood, and 0.68 inch fell in only 30 minutes at Forest Falls.
Homes and roads were flooded with four to six feet of water in Hesperia and Apple Valley.
Rock slides occurred in Mill Creek.
Roads were flooded in Sugarloaf and Forest Falls.
Flash flooding was also recorded in Hemet.
Severe thunderstorm wind gusts of 86 mph hit Sage (south of Hemet).
Gusts of 50 mph were recorded at Rialto and gusts of 45 mph hit San Marcos.
Trees and power lines were downed. Fires were started by lightning near Barona Ranch.
Record heat occurred near the coast as well on these same days.
Temperatures hit 112° in Yorba Linda, 110° in Hemet and Riverside, and over 100° in most of Orange County.
It was 114° in Dulzura on 8.29.
1987: Thunderstorms moved into the southern portion of the San Joaquin Valley in Kern County from the Tehachapis.
Straight line wind damage occurred to several farm buildings.
Five dairy cows were killed and seven injured.
Bakersfield recorded a wind gust of 49 mph from the south.
1977: The wettest August on record in San Diego ended on this day with 2.13 inches.
1972: Hurricane Hyacinth moved as far west as 125 West before recurving to the northeast.
The remnants made landfall between Los Angeles and San Diego on 9.3 with winds of 25 mph and rainfall of up to one inch in the mountains from 8.29 to 9.6.
This tropical cyclone holds the distinction of traveling the farthest west before recurving and making landfall in Southern California.
This occurred during the El Niño of 1972-73.
Only 0.44 inch was measured in San Diego.
1967: Hurricane Katrina crossed the southern tip of Baja California, then traversed almost the entire length of the Gulf of California before making landfall again and rapidly weakening.
More than two inches of rain fell on 8.30 and on this day.
Two inches fell at La Quinta and the city was cut off for several hours.
150 homes were damaged by floods in Palm Desert and Indian Wells.
Numerous roads were washed out in the Coachella Valley.
The Fort Irwin road north of Barstow was flooded, isolating the army base on 8.30.
1964: Fresno received 0.25 inches of rain, making it the wettest August day ever.
Hanford also had its wettest day ever in August with 0.34 inches of rain.
1955: A prolonged heat wave started on this day and ended on 9.7.
It was 110° in LA on 9.1, an all time record.
It was 98° in San Diego and 103° in Santa Ana on this day, both highest temperatures on record for August.
1950: The high temperature at Lovelock, NV was 102.
1939: Sea surface temperatures off the coast for the month of August were in the upper 70s, with some reports near San Diego of 80°.
This occurred ahead of the tropical storms of the following month of 9.1939.
1928: It was 42° in Escondido, the lowest temperature on record for August.
1889: LA recorded its greatest 24 hour rainfall amount for August at 0.61 inch.
1887: Fresno had a record low of 50 degrees.
This is the oldest temperature record for Fresno still in the books.
Source: NWS Hanford, Reno, & San Diego
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