Alert archive / California / Mesoscale Discussions
Mesoscale Discussions in California, 2013
10 mesoscale discussions in 2013. 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 2013. Tap one for its archive.
- Mesoscale Discussions
- 10
- Busiest month
- August6 mesoscale discussions
- Busiest day
- March 31, 20131 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 |
|---|---|---|---|---|
| Mar 31, 2:59 PM PDT | Mesoscale Discussion | SPC | Alameda, Amador, Butte, Calaveras, Colusa, Contra Costa and 26 more | 2 hr |
| May 5, 2:47 PM PDT | Mesoscale Discussion | SPC | Alpine, El Dorado, Lassen, Nevada, Placer, Plumas and 3 more | 118 min |
| Jul 28, 3:52 PM PDT | Mesoscale Discussion | SPC | Inyo | 2 hr |
| Aug 8, 3:43 PM PDT | Mesoscale Discussion | SPC | Lassen, Modoc | 92 min |
| Aug 9, 1:37 PM PDT | Mesoscale Discussion | SPC | Modoc, Siskiyou | 53 min |
| Aug 19, 1:55 PM PDT | Mesoscale Discussion | SPC | Inyo, San Bernardino | 3 hr |
| Aug 21, 12:30 PM PDT | Mesoscale Discussion | SPC | Alpine, Lassen, Modoc, Plumas, Shasta, Sierra and 2 more | 3 hr |
| Aug 22, 11:54 AM PDT | Mesoscale Discussion | SPC | Lassen, Modoc, Shasta, Siskiyou | 2 hr |
| Aug 24, 2:38 PM PDT | Mesoscale Discussion | SPC | Imperial, Riverside | 67 min |
| Dec 6, 9:28 PM PST | Mesoscale Discussion | SPC | Alpine, Amador, Calaveras, El Dorado, Madera, Mariposa and 4 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lassen County4
- Siskiyou County4
- Modoc County4
- El Dorado County3
- Placer County3
- Alpine County3
- Shasta County3
- Amador County2
- Calaveras County2
- Madera County2
- Mariposa County2
- Tuolumne County2
- Yuba County2
- Nevada County2
- Plumas County2
- Sierra County2
- Inyo County2
- Alameda County1
- Butte County1
- Colusa County1
- Contra Costa County1
- Fresno County1
- Glenn County1
- Kings County1
- Lake County1
- Marin County1
- Mendocino County1
- Merced County1
- Monterey County1
- Napa County1
- Sacramento County1
- San Benito County1
- San Joaquin County1
- Santa Clara County1
- Santa Cruz County1
- Solano County1
- Sonoma County1
- Stanislaus County1
- Sutter County1
- Tehama County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20122014
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.