2015: A slow moving upper level low pressure system moved onshore during the previous day.
This system was enhanced by subtropical moisture, which helped increase the threat of heavy rainfall during the day.
Afternoon thunderstorm activity insued due to heating and orographic lift in the mountains.
Flashflooding occurred at the State Road 99 and State Road 198 interchange.
This area was closed due to the flooding that occurred.
This area was under construction during time of this event with bare soils on the side of the roadway.
Crews were able to get the road open quickly once storm drains were opened.
2015: Strong thunderstorms hit northern Ventura and LA counties.
Flash flooding and mud and debris flows occurred in the San Gabriel Mountains, Cuyama, and the Antelope Valley.Golf ball size hail in Leona Valley and quarter size hail in Palmdale were reported.
2007: Strong gusty winds of 45 to 65 mph blew in the Kern County desert causing blowing dust.
This created sharply reduced visibilities resulting in numerous accidents on roads.
On Highway 58 near Mojave, two people died when dust dropped visibility to near zero in two separate accidents.
2004: For the second year in a row rain was completely absent in San Diego during the Summer season.
After measuring 0.30" of rain on April 17th, the city failed to record measurable precipitation through this day.
This streak of dry weather set a record for the most consecutive days without measurable precipitation at 182 days, breaking the prior record established only a year before.
1999: Powerful Diablo Winds raked Northern California during which time a number of fires began and driven by the winds burned much acreage and property and threatened thousands of homes.
In the Redding area the Jones Fire burned 26,202 acres, 128 homes and 300 outbuildings and one firefighter was killed.
In Cache Creek Canyon in Yolo County the "16" Fire began along Hwy 16 and made a long run all the way down to the northern reaches of Lake Berryessa.
The Vargas Fire began in the Sunol Grade area and driven by winds burned 900 acres in the hills above Fremont.
1984: 7" of snow fell at Virginia City, NV.
1971: 4" of snow fell at Carson City, NV.
1971: 4" of snow fell at Carson City, NV.
1971: Mt. Laguna recorded its earliest measurable snowfall of the season on record.
1969: Saint Helena received 1.7" of rain.
1967: A daily record low of 16° F was set at Carson City, NV.
1965: The morning low temperature at Reno, NV, was 18° F.
1963: A funnel cloud was sighted 10 miles southeast of Bakersfield.
1960: Strong gusty winds blew down trees in the Sierra and caused blowing sand in the Kern deserts.
Two people died in Yosemite after being struck by trees.
1958: It was 106° F in Santa Ana, the highest temperature on record for October.
The 103° F reading in Alpine tied the record for highest October temperature.
Source: NWS San Francisco/Monterey, Hanford, Reno, Las Vegas, & San Diego
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