2017: Strong thunderstorms struck the Inland Empire in Wildomar, Corona and Colton.
A gust of 65 mph was reported in the Temescal Valley.
Downburst thunderstorm winds toppled trees and power lines in Wildomar.
Lightning struck a transformer in Colton, knocking out power.
Damage was incurred in mobile homes in east Corona.
2013: Potent monsoonal thunderstorms impacted transportation across the Mojave Desert.
Interestate-15 was shut down in both directions due to flashflooding.
An auto got stuck in the road on Hwy 190 at Scotty's Castle Road.
Hwy 190 was closed at Death Valley Junction due to flashflooding.
Hwy 190/Hwy 136 junction near Keeler closed due to flashflooding.
Multiple instances of water and debris across roads in Landers.
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 3 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: Thunderstorm wind at 45 knots from the east swept into the Paradise Cove area along the south shore of Lake Isabella.
Downed powerlines sparked a grass fire (Yankee Fire) that subsequently burned 1,100 acres at a cost to suppress of $1M.
There was one injury due to smoke inhalation.
Moored boats and jet skies were endangered by the high wind at docks along the south shore.
FlashFlood Warning erroneously issued in conjunction with Severe Thunderstorm Warning ... no verification on the FFW.
Blowing dust was observed by several trained spotters at points east of the lake and along the south side of the lake.
The Yankee Fire was contained on 9/2/98.
1998: Yuma, AZ, sets their all time record warm low temperature at 94° F.
1998: Strong thunderstorms developed each day starting on 8.29 and ending on this day.
1.5" of rain fell at Apple Valley, 0.77" fell in only 45 minutes at Wrightwood, and 0.68" fell in only 30 minutes at Forest Falls.
Homes and roads were flooded with 4'-6' 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° F in Yorba Linda, 110° F in Hemet and Riverside, and over 100° F in most of Orange County.
It was 114° F 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.
5 dairy cows were killed and 7 injured.
Bakersfield recorded a wind gust of 49 mph from the south.
1986: High surf generated by Hurricane Javier, a onetime Category 4 hurricane southwest of Baja, arrived at the beaches Southern California just in time for an international surfing competition.
Waves as big as 15 feet were reported.
1977: The wettest August on record in San Diego ended on this day with 2.13".
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" 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 2" of rain fell on 8.30 and on this day.
2" 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" of rain, making it the wettest August day ever.
Hanford also had its wettest day ever in August with 0.34" 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.
On 9/2 a reading of 120° was reported from Tujunga.
Four deaths and 57 cases of heat prostration were reported in the Los Angeles region.
1944: All-time record stretch of consecutive days with a high in the triple digits in Las Vegas, NV, ends at 66 days.
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° F.
This occurred ahead of the tropical storms of the following month of 9.1939.
1928: It was 42° F in Escondido, the lowest temperature on record for August.
1889: LA recorded its greatest 24 hour rainfall amount for August at 0.61".
1887: Fresno had a record low of 50° F.
This is the oldest temperature record for Fresno still in the books.
Source: NWS Hanford, Las Vegas, Phoenix, & San Diego
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