2017: The Railroad Fire started on the afternoon of August 29, 2017, west of Highway 41, 8.75 miles north of Oakhurst, just south of Yosemite National Park near the community of Sugar Pine.
The fire spread rapidly in dry brush. Highway 41 between Oakhurst and the south entrance of Yosemite National Park was closed in both directions for about a week with several small communities evacuated, including Tenaya Lodge that serves visitors to Yosemite.
The fire burned 12,407 acres before being contained on September 15, 2017.
Cost of containment was $20.8 million.
There were 17 structures destroyed, including a historic locomotive that wasn't being used, as well as a passenger car, snowplow, side dump car and refrigerator car that were attached to it that were part of the Yosemite Mountain Sugar Pine Railroad.
More than 200 wooden railroad ties also burned.
The fire also burned into the Nelder Grove of Giant Sequoia trees.
2017: The human caused Pier Fire began in the early morning hours of August 29, 2017 when a stolen car was set on fire and pushed off a cliff along Highway 190, 7 miles east of Springville, CA.
The fire burned 36,556 acres before being contained on September 24, 2017.
There were mandatory evacuations for the small communities of Camp Nelson, Pierpoint Springs, Cedar Slope, Sequoia Crest, Rogers Camp, Doyle Springs, Mountain Aire and Wishon for several weeks.
Much of Highway 190 between Springville and Ponderosa was closed to traffic.
There were 2 structures lost.
Cost of containment was $38.76 million.
2013: Thunderstorms struck Riverside and the San Bernardino Mountains where over 1" of rain fell in 20 minutes.
Riverside was inundated with flooding of streets up to two feet deep.
Riverside City College canceled classes.
Flash floods occurred around the Perris area and along Highway 18 in the San Bernardino Mountains.
Severe thunderstorm winds estimated at 70 mph hit Riverside and toppled trees there.
2013: Powerful monsoonal thunderstorms developed across the Mojave Desert region.
Flash floods in the Barstow area covered some roads in water and mud and knocked down 4 power poles near National Trails Highway (Route 66) and Minneola Road near Daggett.
Near Joshua Tree flash floods forced the closure of Highway 62.
Twentynine Palms received 2.48" of rain in one hour where flash floods forced the closure of Highway 62 as well.
In Needles (or Needless as the locals call it), street flooding was reported.
On Needles Highway flash flooding 3 feet deep and 100 feet water trapped a man who required a swiftwater rescue.
2010: Strong upper-level trough following a strong ridge that brought record high temperatures to the area only a few days ago dropped temperatures to record low values at many locations including the ASOS sites at Fresno, Hanford, Madera, and Merced.
2001: Gusty wind across the San Luis Reservoir in Western Merced County reached sustained Lake Wind Advisory criteria by the late morning on the 29th.
Some wind at 27 gusting to 32 MPH occurred at 0725 PST ... but sustained wind of 33 MPH with gusts over40 MPH occurred during the afternoon hours.2000: Strong thunderstorms developed in the mountains and deserts of Southern California.
The storms produced intense rainfall that led to flash flooding in Palm Desert and Borrego Springs, that latter of which received 1.5" of rain in 45 minutes and wind gusts to 61 mph.
Flash flooding resulted, with mud in homes and damaged roads in the Borrego Springs area and portions of Borrego Springs were flooded with up to 1 foot of water.
The flood waters roared through the dry washes in Anza-Borrego State Park.Flash floods, mud and debris covered roads from Yucca Valley to Palm Springs and Oasis.
2000: Heavy rainfall totaling nearly 2" of rain soaked the northwest part of Las Vegas.
Several swift water rescues were preformed after people ignored warning signs.
No injuries were reported, but at least 40 motorists became stranded.
1998: Strong thunderstorms developed each day starting on this day and ending on 8.31.
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 four to 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.
Record heat occurred near the coast as well on these same days.
Temperatures hit 114° F in Dulzura, 112° F in Yorba Linda and the Wild Animal Park, 110° F in El Cajon, Hemet and Riverside, 108° F in Ramona, 106° F in Vista and Escondido, and over 100° F in most of Orange County.
1993: A severe thunderstorm in the Imperial Valley produced an F1 tornado near Calipatria, just south of the Salton Sea.
Power lines were downed and the roof was partially torn from a school building.
1974: It was 92° F in Big Bear Lake, the highest temperature on record for August.
This also occurred on 8.8.1981 and on 8.25.1985.
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 September 3rd with winds of 25 mph and rainfall of up to 1" in the mountains from this day to September 6th.
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 comes up the Gulf of California and comes ashore south of Yuma, AZ.
Over 2" of rain fall in southwest Arizona with lesser amounts elsewhere.
1951: A hurricane moving north northwestward just off the west coast of Baja California moved northeastward into northern Baja California and dissipated.
Moisture from this tropical cyclone resulted in rainfall of 2"-5" in the mountains and deserts starting on 8.27 and ending on this day.
Many roads were washed out in the Imperial Valley, but otherwise no major damage occurred.
This occurred during the El Niño of 1951-52.
1946: Low of 20° F at Grant Grove in Kings Canyon National Park, coldest of record at this location for the month of August.
1942: It was 36° F in Palomar Mountain, the lowest temperature on record for August.
1896: Santa Cruz received 0.73" of rain -- a record for the month.
1895: The low temperature was 54° F in San Diego, the lowest temperature on record for August.
Source: NWS San Francisco/Monterey, Hanford, Las Vegas, Phoenix, & San Diego
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