Alert archive / California / Mesoscale Discussions / 2012
Mesoscale Discussions in California, April 2012
4 mesoscale discussions in April 2012. 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 April 2012. Tap one for its archive.
- Mesoscale Discussions
- 4
- Busiest day
- April 12, 20122 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 |
|---|---|---|---|---|
| Apr 12, 11:11 AM PDT | Mesoscale Discussion | SPC | Amador, Calaveras, Colusa, Glenn, Humboldt, Sacramento and 7 more | 64 min |
| Apr 12, 3:08 PM PDT | Mesoscale Discussion | SPC | Colusa, Glenn, Merced, Sacramento, San Joaquin, Stanislaus and 3 more | 97 min |
| Apr 13, 10:53 AM PDT | Mesoscale Discussion | SPC | Alameda, Contra Costa, Merced, Napa, Sacramento, San Joaquin and 4 more | 2 hr |
| Apr 23, 1:39 PM PDT | Mesoscale Discussion | SPC | Lassen, Modoc, Plumas, Sierra | 96 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Sacramento County3
- San Joaquin County3
- Stanislaus County3
- Yolo County3
- Colusa County2
- Glenn County2
- Sutter County2
- Tehama County2
- Merced County2
- Amador County1
- Calaveras County1
- Humboldt County1
- Trinity County1
- Yuba County1
- Alameda County1
- Contra Costa County1
- Napa County1
- Santa Clara County1
- Solano County1
- Lassen County1
- Modoc County1
- Plumas County1
- Sierra County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20112013
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.