Alert archive / California / Frost Advisories / 2021
Frost Advisories in California, March 2021
23 frost advisories in March 2021. 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 frost advisories reaches back to 2005.
Frost Advisories by county
Each county as a circle sized by its count in March 2021. Tap one for its archive.
- Frost Advisories
- 23
- Busiest day
- March 15, 20213 frost advisories
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 |
|---|---|---|---|---|
| Mar 1, 2:42 PM PST | Frost Advisory | EKA | Humboldt, Lake, Mendocino | 18 hr |
| Mar 2, 2:37 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Lake, Mendocino | 18 hr |
| Mar 4, 1:07 AM PST | Frost Advisory | EKA | Mendocino | 7 hr |
| Mar 6, 3:32 AM PST | Frost Advisory | EKA | Mendocino | 29 hr |
| Mar 7, 2:04 PM PST | Frost Advisory | EKA | Humboldt, Mendocino | 17 hr |
| Mar 10, 2:31 PM PST | Frost Advisory | EKA | Humboldt, Mendocino | 18 hr |
| Mar 11, 1:04 PM PST | Frost Advisory | EKA | Humboldt, Mendocino | 20 hr |
| Mar 12, 1:43 PM PST | Frost Advisory | EKA | Mendocino | 19 hr |
| Mar 13, 12:36 PM PST | Frost Advisory | EKA | Mendocino | 18 hr |
| Mar 15, 2:30 AM PDT | Frost Advisory | MTR | Marin, Monterey, Napa, San Benito, Sonoma | 31 hr |
| Mar 15, 1:01 PM PDT | Frost Advisory | SGX | Riverside, San Bernardino, San Diego | 19 hr |
| Mar 15, 1:31 PM PDT | Frost Advisory | STO | 20 hr | |
| Mar 16, 1:27 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 20 hr |
| Mar 19, 3:32 AM PDT | Frost Advisory | EKA | Lake, Mendocino | 29 hr |
| Mar 20, 12:51 PM PDT | Frost Advisory | MTR | Marin, Monterey, Napa, Sonoma | 20 hr |
| Mar 20, 2:30 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt | 18 hr |
| Mar 22, 3:28 AM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 30 hr |
| Mar 23, 2:04 PM PDT | Frost Advisory | EKA | Humboldt, Mendocino | 19 hr |
| Mar 24, 2:08 PM PDT | Frost Advisory | EKA | Lake, Mendocino | 19 hr |
| Mar 25, 2:12 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 19 hr |
| Mar 26, 2:32 PM PDT | Frost Advisory | EKA | Humboldt, Lake, Mendocino | 18 hr |
| Mar 28, 2:29 PM PDT | Frost Advisory | EKA | Lake, Mendocino | 19 hr |
| Mar 29, 2:24 PM PDT | Frost Advisory | EKA | Del Norte, Mendocino | 19 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.