Alert archive / California / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in California, 1990
35 severe thunderstorm warnings in 1990. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 1990. Tap one for its archive.
- Severe Thunderstorm Warnings
- 35
- Busiest month
- August18 severe thunderstorm warnings
- Busiest day
- August 12, 19908 severe thunderstorm warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 5:09 PM PDT | Severe Thunderstorm Warning | STO | Amador, El Dorado, Sacramento | 66 min |
| Jul 13, 9:36 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 3 hr |
| Jul 13, 11:05 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 115 min |
| Jul 13, 11:05 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 115 min |
| Jul 14, 1:00 AM PDT | Severe Thunderstorm Warning | LOX | Riverside | 2 hr |
| Jul 14, 1:00 AM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 2 hr |
| Jul 14, 10:02 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 118 min |
| Jul 14, 10:02 PM PDT | Severe Thunderstorm Warning | VEF | Inyo | 118 min |
| Jul 14, 11:50 PM PDT | Severe Thunderstorm Warning | VEF | Inyo | 2 hr |
| Jul 15, 12:20 AM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 100 min |
| Jul 15, 1:40 AM PDT | Severe Thunderstorm Warning | LOX | Riverside | 2 hr |
| Jul 15, 1:40 AM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 2 hr |
| Jul 18, 6:44 PM PDT | Severe Thunderstorm Warning | STO | Siskiyou, Trinity | 2 hr |
| Jul 18, 6:44 PM PDT | Severe Thunderstorm Warning | STO | Shasta | 2 hr |
| Aug 5, 6:05 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 105 min |
| Aug 5, 9:33 PM PDT | Severe Thunderstorm Warning | SGX | Imperial | 117 min |
| Aug 6, 3:10 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 3 hr |
| Aug 6, 5:50 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 2 hr |
| Aug 6, 8:00 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 55 min |
| Aug 6, 8:00 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 55 min |
| Aug 7, 4:09 PM PDT | Severe Thunderstorm Warning | STO | Nevada, Sierra | 2 hr |
| Aug 7, 4:09 PM PDT | Severe Thunderstorm Warning | STO | El Dorado, Placer | 2 hr |
| Aug 11, 7:33 PM PDT | Severe Thunderstorm Warning | SGX | Imperial | 117 min |
| Aug 11, 7:50 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 100 min |
| Aug 11, 8:15 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 75 min |
| Aug 11, 8:15 PM PDT | Severe Thunderstorm Warning | SGX | Imperial | 75 min |
| Aug 11, 9:35 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 2 hr |
| Aug 11, 9:35 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 2 hr |
| Aug 11, 11:30 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 90 min |
| Aug 11, 11:30 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 90 min |
| Aug 14, 5:12 PM PDT | Severe Thunderstorm Warning | VEF | Inyo | 48 min |
| Aug 14, 7:01 PM PDT | Severe Thunderstorm Warning | SGX | Imperial | 119 min |
| Sep 23, 6:30 PM PDT | Severe Thunderstorm Warning | STO | Siskiyou | 3 hr |
| Sep 23, 6:30 PM PDT | Severe Thunderstorm Warning | STO | Shasta, Tehama | 3 hr |
| Sep 23, 6:30 PM PDT | Severe Thunderstorm Warning | STO | Trinity | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19891991
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.