Alert archive / California / Mesoscale Discussions
Mesoscale Discussions in California, 2011
19 mesoscale discussions in 2011. 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 2011. Tap one for its archive.
- Mesoscale Discussions
- 19
- Busiest month
- February6 mesoscale discussions
- Busiest day
- February 25, 20113 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 |
|---|---|---|---|---|
| Feb 15, 5:17 PM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Plumas, Sierra and 1 more | 6 hr |
| Feb 16, 2:22 AM PST | Mesoscale Discussion | SPC | Amador, Calaveras, Mariposa, Tuolumne | 3 hr |
| Feb 18, 10:15 PM PST | Mesoscale Discussion | SPC | Orange | 90 min |
| Feb 24, 5:15 PM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Plumas, Sierra and 1 more | 6 hr |
| Feb 25, 12:25 AM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Tuolumne | 6 hr |
| Feb 25, 10:19 AM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Tulare, Tuolumne | 4 hr |
| Mar 13, 12:31 PM PDT | Mesoscale Discussion | SPC | Del Norte, Humboldt | 119 min |
| Mar 18, 9:26 AM PDT | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Plumas, Sierra and 1 more | 4 hr |
| Mar 18, 11:37 AM PDT | Mesoscale Discussion | SPC | San Mateo, Santa Cruz | 53 min |
| Mar 20, 9:51 AM PDT | Mesoscale Discussion | SPC | Alpine, Tuolumne | 4 hr |
| Mar 24, 9:58 AM PDT | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Plumas, Sierra and 1 more | 4 hr |
| Jul 3, 7:26 PM PDT | Mesoscale Discussion | SPC | Imperial, Riverside, San Bernardino | 2 hr |
| Jul 5, 5:36 PM PDT | Mesoscale Discussion | SPC | Imperial | 54 min |
| Jul 5, 9:28 PM PDT | Mesoscale Discussion | SPC | Imperial, Riverside | 2 hr |
| Jul 6, 12:45 PM PDT | Mesoscale Discussion | SPC | Imperial, Riverside, San Diego | 3 hr |
| Sep 10, 3:39 PM PDT | Mesoscale Discussion | SPC | Kern | 3 hr |
| Sep 13, 7:15 AM PDT | Mesoscale Discussion | SPC | Riverside | 90 min |
| Sep 13, 3:56 PM PDT | Mesoscale Discussion | SPC | Imperial, Riverside | 94 min |
| Oct 5, 3:35 AM PDT | Mesoscale Discussion | SPC | Alpine | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Alpine County8
- Tuolumne County8
- El Dorado County6
- Nevada County6
- Placer County6
- Imperial County5
- Riverside County5
- Plumas County4
- Sierra County4
- Amador County1
- Calaveras County1
- Mariposa County1
- Orange County1
- Tulare County1
- Del Norte County1
- Humboldt County1
- San Mateo County1
- Santa Cruz County1
- San Bernardino County1
- San Diego County1
- Kern County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.