Alert archive / California / Mesoscale Discussions
Mesoscale Discussions in California, 2007
7 mesoscale discussions in 2007. 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 2007. Tap one for its archive.
- Mesoscale Discussions
- 7
- Busiest month
- December3 mesoscale discussions
- Busiest day
- December 20, 20072 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 |
|---|---|---|---|---|
| Jul 11, 1:08 PM PDT | Mesoscale Discussion | SPC | Alpine, Lassen, Modoc, Mono, Plumas, Shasta and 2 more | 3 hr |
| Sep 4, 4:18 PM PDT | Mesoscale Discussion | SPC | Imperial, Riverside | 2 hr |
| Sep 21, 11:12 PM PDT | Mesoscale Discussion | SPC | Los Angeles, Orange | 3 hr |
| Oct 29, 12:46 PM PDT | Mesoscale Discussion | SPC | Amador, Butte, Calaveras, El Dorado, Fresno, Madera and 7 more | 89 min |
| Dec 18, 10:10 AM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Tulare, Tuolumne | 5 hr |
| Dec 19, 4:40 PM PST | Mesoscale Discussion | SPC | Siskiyou | 5 hr |
| Dec 19, 9:34 PM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Plumas, Sierra and 1 more | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Alpine County3
- Plumas County3
- Sierra County3
- El Dorado County3
- Nevada County3
- Placer County3
- Tuolumne County3
- Siskiyou County2
- Lassen County1
- Modoc County1
- Mono County1
- Shasta County1
- Imperial County1
- Riverside County1
- Los Angeles County1
- Orange County1
- Amador County1
- Butte County1
- Calaveras County1
- Fresno County1
- Madera County1
- Mariposa County1
- Yuba County1
- Tulare County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20062008
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.