Alert archive / California / Mesoscale Discussions / 2004
Mesoscale Discussions in California, December 2004
16 mesoscale discussions in December 2004. 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 December 2004. Tap one for its archive.
- Mesoscale Discussions
- 16
- Busiest day
- December 30, 20044 mesoscale discussions
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| Dec 6, 3:01 PM PST | Mesoscale Discussion | SPC | Nevada, Plumas, Sierra, Siskiyou, Trinity | 4 hr |
| Dec 6, 8:18 PM PST | Mesoscale Discussion | SPC | Alpine, Amador, Calaveras, El Dorado, Lassen, Mariposa and 8 more | 6 hr |
| Dec 7, 3:55 AM PST | Mesoscale Discussion | SPC | Amador, El Dorado, Tuolumne | 6 hr |
| Dec 7, 10:57 PM PST | Mesoscale Discussion | SPC | Nevada, Placer, Shasta, Sierra | 6 hr |
| Dec 28, 4:48 AM PST | Mesoscale Discussion | SPC | Amador, Calaveras, Madera, Mariposa, Tulare, Tuolumne | 4 hr |
| Dec 28, 10:36 AM PST | Mesoscale Discussion | SPC | Mariposa, Tulare, Tuolumne | 4 hr |
| Dec 28, 10:47 AM PST | Mesoscale Discussion | SPC | San Luis Obispo, Santa Barbara, Ventura | 88 min |
| Dec 28, 11:23 PM PST | Mesoscale Discussion | SPC | Orange | 2 hr |
| Dec 29, 4:42 PM PST | Mesoscale Discussion | SPC | El Dorado, Nevada, Placer, Plumas, Sierra, Siskiyou and 1 more | 5 hr |
| Dec 29, 10:17 PM PST | Mesoscale Discussion | SPC | Nevada, Plumas, Sierra, Siskiyou, Trinity | 4 hr |
| Dec 30, 5:01 AM PST | Mesoscale Discussion | SPC | El Dorado, Nevada, Placer, Plumas, Sierra, Siskiyou and 2 more | 4 hr |
| Dec 30, 11:03 AM PST | Mesoscale Discussion | SPC | El Dorado, Nevada, Placer, Sierra, Tuolumne | 5 hr |
| Dec 30, 4:47 PM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Plumas, Sierra and 1 more | 4 hr |
| Dec 30, 10:15 PM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Plumas, Sierra, Tuolumne | 4 hr |
| Dec 31, 4:20 AM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Tulare, Tuolumne | 4 hr |
| Dec 31, 10:57 AM PST | Mesoscale Discussion | SPC | Mono | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Nevada County9
- Sierra County9
- Tuolumne County9
- El Dorado County8
- Plumas County7
- Placer County6
- Siskiyou County5
- Trinity County5
- Alpine County4
- Amador County3
- Mariposa County3
- Tulare County3
- Calaveras County2
- Shasta County2
- Lassen County1
- Madera County1
- San Luis Obispo County1
- Santa Barbara County1
- Ventura County1
- Orange County1
- Mono County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20032005
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.