Alert archive / California / Mesoscale Discussions

Mesoscale Discussions in California, 2010

30 mesoscale discussions in 2010. 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 2010. Tap one for its archive.

Mesoscale Discussions
30
Busiest month
January15 mesoscale discussions
Busiest day
January 19, 20104 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.

IssuedProductOfficeCountiesLasted
Jan 12, 4:34 PM PSTMesoscale DiscussionSPCAlpine, El Dorado, Mono, Nevada, Placer, Plumas and 2 more4 hr
Jan 13, 12:17 AM PSTMesoscale DiscussionSPCAlpine, Amador, Calaveras, El Dorado, Mariposa, Nevada and 4 more4 hr
Jan 18, 10:03 AM PSTMesoscale DiscussionSPCAlpine, Tuolumne4 hr
Jan 18, 10:16 AM PSTMesoscale DiscussionSPCAlameda, San Mateo, Santa Clara, Santa Cruz59 min
Jan 19, 3:56 AM PSTMesoscale DiscussionSPCTrinity4 hr
Jan 19, 9:22 AM PSTMesoscale DiscussionSPCSanta Barbara, Ventura83 min
Jan 19, 12:02 PM PSTMesoscale DiscussionSPCOrange, Ventura58 min
Jan 19, 3:53 PM PSTMesoscale DiscussionSPCFresno, Merced, Napa, Sacramento, San Joaquin, Solano and 3 more97 min
Jan 19, 4:35 PM PSTMesoscale DiscussionSPCImperial115 min
Jan 20, 8:28 AM PSTMesoscale DiscussionSPCEl Dorado, Nevada, Sierra, Tuolumne4 hr
Jan 20, 9:58 AM PSTMesoscale DiscussionSPCMonterey, San Mateo, Santa Barbara, Santa Cruz, Ventura92 min
Jan 20, 2:55 PM PSTMesoscale DiscussionSPCLos Angeles, Monterey, Orange, San Benito, San Luis Obispo, Santa Barbara and 1 more95 min
Jan 21, 11:51 AM PSTMesoscale DiscussionSPCOrange, Santa Barbara, Ventura54 min
Jan 21, 2:34 PM PSTMesoscale DiscussionSPCImperial56 min
Jan 21, 6:30 PM PSTMesoscale DiscussionSPCLos Angeles, Orange, San Diego, Ventura60 min
Feb 9, 11:27 AM PSTMesoscale DiscussionSPCLos Angeles, Orange, Ventura2 hr
Feb 27, 10:40 AM PSTMesoscale DiscussionSPCOrange3 hr
Apr 20, 5:56 AM PDTMesoscale DiscussionSPCMadera, Mariposa, Tuolumne3 hr
Aug 17, 3:09 PM PDTMesoscale DiscussionSPCImperial96 min
Aug 25, 1:35 PM PDTMesoscale DiscussionSPCSan Diego70 min
Oct 1, 1:21 PM PDTMesoscale DiscussionSPCImperial, Kern, Los Angeles, Riverside84 min
Oct 3, 11:45 PM PDTMesoscale DiscussionSPCFresno, Kern, Kings, Madera, Mariposa, Merced and 2 more90 min
Oct 4, 10:52 AM PDTMesoscale DiscussionSPCSan Bernardino113 min
Oct 4, 2:34 PM PDTMesoscale DiscussionSPCImperial, Riverside116 min
Oct 19, 11:46 AM PDTMesoscale DiscussionSPCImperial, Riverside, San Diego89 min
Nov 20, 6:02 PM PSTMesoscale DiscussionSPCAlameda, Contra Costa, San Joaquin, San Mateo, Santa Clara, Santa Cruz and 1 more88 min
Nov 20, 8:39 PM PSTMesoscale DiscussionSPCAlpine, El Dorado, Mono, Nevada, Placer, Plumas and 2 more4 hr
Dec 19, 9:08 AM PSTMesoscale DiscussionSPCAlpine, El Dorado, Mariposa, Nevada, Placer, Sierra and 1 more5 hr
Dec 22, 12:37 PM PSTMesoscale DiscussionSPCImperial, Orange, San Diego83 min
Dec 28, 4:58 PM PSTMesoscale DiscussionSPCAlpine, El Dorado, Nevada, Placer, Plumas, Sierra and 1 more6 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

1 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. January 19, 20104mesoscale discussions
  2. January 20, 20104mesoscale discussions
  3. October 4, 20103mesoscale discussions
  4. January 13, 20102mesoscale discussions
  5. January 18, 20102mesoscale discussions
  6. January 21, 20102mesoscale discussions
  7. November 21, 20102mesoscale discussions
  8. January 22, 20101mesoscale discussions
  9. February 9, 20101mesoscale discussions
  10. February 27, 20101mesoscale discussions
  11. April 20, 20101mesoscale discussions
  12. August 17, 20101mesoscale discussions

Nearby

Alerts in force nowTornadoes on recordThe radar archive20092011

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.