Alert archive / California / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in California, 1991
11 severe thunderstorm warnings in 1991. 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 1991. Tap one for its archive.
- Severe Thunderstorm Warnings
- 11
- Busiest month
- September7 severe thunderstorm warnings
- Busiest day
- September 20, 19914 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 |
|---|---|---|---|---|
| Jun 7, 5:39 PM PDT | Severe Thunderstorm Warning | STO | Nevada, Sierra | 66 min |
| Jun 7, 5:39 PM PDT | Severe Thunderstorm Warning | STO | Placer | 66 min |
| Jul 18, 5:46 PM PDT | Severe Thunderstorm Warning | STO | El Dorado | 59 min |
| Aug 11, 5:39 PM PDT | Severe Thunderstorm Warning | STO | Nevada, Placer, Sierra | 66 min |
| Sep 4, 2:00 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 60 min |
| Sep 4, 4:30 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 69 min |
| Sep 4, 5:36 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 24 min |
| Sep 19, 6:59 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 2 hr |
| Sep 19, 6:59 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 2 hr |
| Sep 19, 8:45 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 75 min |
| Sep 19, 8:45 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 75 min |
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 archive19901992
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.