Alert archive / California / Mesoscale Discussions
Mesoscale Discussions in California, 2022
9 mesoscale discussions in 2022. 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 mesoscale discussions reaches back to 2003.
Mesoscale Discussions by county
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Mesoscale Discussions
- 9
- Busiest month
- September4 mesoscale discussions
- Busiest day
- September 3, 20221 mesoscale discussions
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 |
|---|---|---|---|---|
| Sep 3, 1:38 PM PDT | Mesoscale Discussion | SPC | Inyo, San Bernardino | 3 hr |
| Sep 4, 2:40 PM PDT | Mesoscale Discussion | SPC | San Bernardino | 2 hr |
| Sep 10, 12:53 PM PDT | Mesoscale Discussion | SPC | Mono | 2 hr |
| Sep 19, 1:04 PM PDT | Mesoscale Discussion | SPC | Butte, Colusa, Glenn, Sacramento, San Joaquin, Sutter and 2 more | 116 min |
| Oct 15, 11:46 AM PDT | Mesoscale Discussion | SPC | Imperial, Riverside | 2 hr |
| Nov 8, 9:36 AM PST | Mesoscale Discussion | SPC | Los Angeles, Orange, Santa Barbara, Ventura | 2 hr |
| Dec 1, 9:54 AM PST | Mesoscale Discussion | SPC | El Dorado, Nevada, Placer, Plumas, Sierra | 4 hr |
| Dec 10, 1:32 PM PST | Mesoscale Discussion | SPC | Alpine | 6 hr |
| Dec 31, 9:41 AM PST | Mesoscale Discussion | SPC | Alpine, Sierra | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- San Bernardino County2
- Sierra County2
- Alpine County2
- Inyo County1
- Mono County1
- Butte County1
- Colusa County1
- Glenn County1
- Sacramento County1
- San Joaquin County1
- Sutter County1
- Yolo County1
- Yuba County1
- Imperial County1
- Riverside County1
- Los Angeles County1
- Orange County1
- Santa Barbara County1
- Ventura County1
- El Dorado County1
- Nevada County1
- Placer County1
- Plumas County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20212023
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.