Alert archive / California / Heat Advisories

Heat Advisories in California, 2018

38 heat advisories in 2018. 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 heat advisories reaches back to 2005.

Heat Advisories by county

Each county as a circle sized by its count in 2018. Tap one for its archive.

Heat Advisories: 38
Busiest month: July24 heat advisories
Busiest day: June 21, 20183 heat advisories

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
Jun 3, 3:25 AM PDT	Heat Advisory	LOX		18 hr
Jun 20, 1:59 PM PDT	Heat Advisory	VEF	Inyo	3 days
Jun 21, 11:54 AM PDT	Heat Advisory	MTR	Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more	56 hr
Jun 21, 12:18 PM PDT	Heat Advisory	STO		3 days
Jun 21, 1:08 PM PDT	Heat Advisory	HNX		3 days
Jun 22, 1:25 PM PDT	Heat Advisory	EKA	Mendocino	32 hr
Jun 30, 2:14 AM PDT	Heat Advisory	EKA	Mendocino	18 hr
Jun 30, 2:27 AM PDT	Heat Advisory	MTR	Marin, Napa, Sonoma	18 hr
Jul 1, 2:39 AM PDT	Heat Advisory	EKA	Mendocino	17 hr
Jul 5, 2:40 AM PDT	Heat Advisory	SGX	Orange, Riverside, San Bernardino, San Diego	42 hr
Jul 6, 1:43 PM PDT	Heat Advisory	SGX	San Diego	31 hr
Jul 6, 6:32 PM PDT	Heat Advisory	MTR	Monterey, San Benito	26 hr
Jul 7, 8:44 PM PDT	Heat Advisory	LOX	Los Angeles, Santa Barbara	24 hr
Jul 7, 9:03 PM PDT	Heat Advisory	SGX	Riverside, San Bernardino, San Diego	24 hr
Jul 11, 5:00 AM PDT	Heat Advisory	EKA	Del Norte, Humboldt, Trinity	39 hr
Jul 13, 4:32 AM PDT	Heat Advisory	STO		6 days
Jul 13, 2:35 PM PDT	Heat Advisory	EKA	Del Norte, Humboldt, Trinity	33 hr
Jul 15, 4:01 AM PDT	Heat Advisory	EKA	Del Norte, Humboldt, Mendocino, Trinity	5 days
Jul 15, 2:45 PM PDT	Heat Advisory	REV	Modoc	4 days
Jul 16, 3:56 AM PDT	Heat Advisory	EKA	Mendocino	4 days
Jul 17, 3:41 AM PDT	Heat Advisory	VEF	Inyo	41 hr
Jul 18, 2:19 PM PDT	Heat Advisory	STO		30 hr
Jul 19, 3:18 PM PDT	Heat Advisory	EKA	Del Norte, Mendocino, Trinity	30 hr
Jul 20, 12:51 PM PDT	Heat Advisory	SGX	Orange, San Diego	6 days
Jul 21, 2:46 PM PDT	Heat Advisory	MTR	Monterey, San Benito	6 days
Jul 22, 12:56 PM PDT	Heat Advisory	LOX	Los Angeles, Santa Barbara	7 days
Jul 22, 2:32 PM PDT	Heat Advisory	MFR	Siskiyou	4 days
Jul 22, 3:01 PM PDT	Heat Advisory	STO		6 days
Jul 23, 5:08 AM PDT	Heat Advisory	HNX		7 days
Jul 24, 3:34 AM PDT	Heat Advisory	EKA	Humboldt, Mendocino, Trinity	67 hr
Jul 27, 3:23 AM PDT	Heat Advisory	EKA	Mendocino, Trinity	41 hr
Jul 29, 3:15 AM PDT	Heat Advisory	EKA	Mendocino, Trinity	17 hr
Aug 5, 2:05 PM PDT	Heat Advisory	LOX		54 hr
Aug 7, 2:34 AM PDT	Heat Advisory	MFR	Siskiyou	66 hr
Aug 8, 1:21 PM PDT	Heat Advisory	SGX	Orange, Riverside, San Bernardino, San Diego	31 hr
Aug 8, 1:40 PM PDT	Heat Advisory	LOX	Los Angeles	30 hr
Aug 10, 4:36 AM PDT	Heat Advisory	LOX	Los Angeles	15 hr
Sep 7, 7:48 PM PDT	Heat Advisory	LOX	Los Angeles	24 hr

By county

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

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record The radar archive 2017 2019

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.