Alert archive / California / Severe Thunderstorm Warnings / 2009

Severe Thunderstorm Warnings in California, May 2009

40 severe thunderstorm warnings in May 2009. 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 severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

Each county as a circle sized by its count in May 2009. Tap one for its archive.

Severe Thunderstorm Warnings: 40
Busiest day: May 28, 20099 severe thunderstorm warnings

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
May 3, 5:28 PM PDT	Severe Thunderstorm Warning	STO	Tehama	62 min
May 18, 2:30 PM PDT	Severe Thunderstorm Warning	HNX	Kern	60 min
May 18, 3:01 PM PDT	Severe Thunderstorm Warning	HNX	Madera, Mariposa	44 min
May 18, 3:49 PM PDT	Severe Thunderstorm Warning	HNX	Mariposa, Tuolumne	56 min
May 18, 3:59 PM PDT	Severe Thunderstorm Warning	LOX	San Luis Obispo, Santa Barbara	61 min
May 18, 5:07 PM PDT	Severe Thunderstorm Warning	HNX	Tulare	30 min
May 22, 4:13 PM PDT	Severe Thunderstorm Warning	REV	Alpine	32 min
May 22, 4:48 PM PDT	Severe Thunderstorm Warning	REV	Alpine	27 min
May 22, 5:21 PM PDT	Severe Thunderstorm Warning	REV	Alpine	24 min
May 24, 5:29 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas	46 min
May 25, 6:42 PM PDT	Severe Thunderstorm Warning	STO	Plumas, Sierra	45 min
May 27, 3:50 PM PDT	Severe Thunderstorm Warning	STO	Shasta	20 min
May 27, 3:56 PM PDT	Severe Thunderstorm Warning	STO	Nevada, Sierra	43 min
May 27, 4:01 PM PDT	Severe Thunderstorm Warning	LOX	Santa Barbara	59 min
May 27, 4:05 PM PDT	Severe Thunderstorm Warning	STO	Shasta	31 min
May 27, 4:12 PM PDT	Severe Thunderstorm Warning	REV	Lassen	33 min
May 27, 4:24 PM PDT	Severe Thunderstorm Warning	STO	Tuolumne	66 min
May 27, 4:33 PM PDT	Severe Thunderstorm Warning	HNX	Madera	27 min
May 27, 5:12 PM PDT	Severe Thunderstorm Warning	STO	Amador, Calaveras	63 min
May 28, 2:30 PM PDT	Severe Thunderstorm Warning	LOX	San Luis Obispo, Santa Barbara	90 min
May 28, 3:19 PM PDT	Severe Thunderstorm Warning	REV	Sierra	41 min
May 28, 3:35 PM PDT	Severe Thunderstorm Warning	REV	Plumas, Sierra	40 min
May 28, 3:38 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	37 min
May 28, 3:57 PM PDT	Severe Thunderstorm Warning	REV	Lassen	48 min
May 28, 4:30 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	30 min
May 28, 4:56 PM PDT	Severe Thunderstorm Warning	LOX	San Luis Obispo	64 min
May 28, 4:56 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas	21 min
May 28, 5:37 PM PDT	Severe Thunderstorm Warning	STO	Lassen, Plumas, Shasta	44 min
May 28, 7:59 PM PDT	Severe Thunderstorm Warning	HNX	Tulare	46 min
May 28, 8:31 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Tulare	44 min
May 28, 8:45 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Kings, Tulare	45 min
May 28, 9:13 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Tulare	47 min
May 28, 9:17 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Tulare	43 min
May 28, 9:27 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Kings, Tulare	39 min
May 29, 2:47 PM PDT	Severe Thunderstorm Warning	REV	Plumas, Sierra	28 min
May 29, 5:14 PM PDT	Severe Thunderstorm Warning	HNX	Tulare	31 min
May 30, 12:52 PM PDT	Severe Thunderstorm Warning	STO	Plumas, Shasta, Tehama	24 min
May 30, 1:34 PM PDT	Severe Thunderstorm Warning	HNX	Madera	17 min
May 30, 1:35 PM PDT	Severe Thunderstorm Warning	HNX	Madera, Mariposa	40 min
May 31, 2:51 PM PDT	Severe Thunderstorm Warning	HNX	Kern	24 min

By county

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

Nearby

Alerts in force now Tornadoes on record The radar archive 2008 2010

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.