Alert archive / California / Merced County
Weather alerts in Merced County, California, 2022
70 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Merced County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 70
- Warnings
- 12
- Watches
- 9
- Advisories
- 43
- Busiest month
- December23 alerts
- Busiest day
- June 23, 20224 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Merced County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 0 | 100% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Hanford, CA: severe thunderstorm warnings | 4 | 0 | 100% | 2 | 0% | |
| NWS Hanford, CA: flash flood warnings | 20 | 1 | 95% | 21 | 5% | 120 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
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 | Lasted |
|---|---|---|---|
| Jan 8, 2:37 AM PST | Dense Fog Advisory | HNX | 7 hr |
| Jan 9, 9:07 PM PST | Dense Fog Advisory | HNX | 14 hr |
| Jan 10, 9:15 PM PST | Dense Fog Advisory | HNX | 16 hr |
| Jan 11, 5:59 PM PST | Dense Fog Advisory | HNX | 19 hr |
| Jan 14, 1:38 AM PST | Dense Fog Advisory | HNX | 12 hr |
| Jan 14, 5:36 PM PST | Dense Fog Advisory | HNX | 18 hr |
| Jan 15, 4:47 PM PST | Dense Fog Advisory | HNX | 19 hr |
| Jan 21, 2:29 AM PST | Dense Fog Advisory | HNX | 10 hr |
| Jan 21, 10:23 PM PST | Dense Fog Advisory | HNX | 14 hr |
| Jan 31, 11:45 AM PST | Freeze Watch | HNX | 23 hr |
| Jan 31, 11:45 AM PST | Wind Advisory | HNX | 25 hr |
| Feb 1, 10:57 AM PST | Freeze Warning | HNX | 69 hr |
| Feb 14, 1:08 AM PST | Wind Advisory | HNX | 44 hr |
| Feb 21, 12:08 AM PST | Freeze Watch | HNX | 24 hr |
| Feb 22, 12:09 AM PST | Freeze Warning | HNX | 4 days |
| Mar 6, 12:32 PM PST | Freeze Warning | HNX | 19 hr |
| Mar 26, 2:05 AM PDT | Wind Advisory | HNX | 57 hr |
| Mar 28, 4:22 PM PDT | Special Weather Statement | HNX | 38 min |
| Apr 9, 12:24 AM PDT | Wind Advisory | HNX | 28 hr |
| Apr 21, 1:27 PM PDT | Special Weather Statement | HNX | 33 min |
| Apr 21, 2:02 PM PDT | Special Weather Statement | HNX | 28 min |
| Apr 21, 2:12 PM PDT | Special Weather Statement | HNX | 48 min |
| May 18, 12:01 PM PDT | Wind Advisory | HNX | 47 hr |
| May 22, 11:02 AM PDT | Heat Advisory | HNX | 3 days |
| Jun 7, 12:08 PM PDT | Excessive Heat Watch | HNX | 24 hr |
| Jun 8, 12:12 PM PDT | Heat Advisory | HNX | 3 days |
| Jun 22, 8:29 PM PDT | Severe Thunderstorm Warning | HNX | 31 min |
| Jun 22, 10:29 PM PDT | Severe Thunderstorm Warning | HNX | 46 min |
| Jun 22, 11:09 PM PDT | Special Weather Statement | HNX | 36 min |
| Jun 23, 1:28 AM PDT | Areal Flood Advisory | HNX | 62 min |
| Jun 25, 12:46 AM PDT | Heat Advisory | HNX | 4 days |
| Jul 11, 12:01 AM PDT | Heat Advisory | HNX | 22 hr |
| Jul 15, 12:50 PM PDT | Excessive Heat Warning | HNX | 5 days |
| Jul 20, 2:55 PM PDT | Heat Advisory | HNX | 32 hr |
| Aug 13, 11:50 AM PDT | Excessive Heat Watch | HNX | 49 hr |
| Aug 15, 12:21 PM PDT | Excessive Heat Warning | HNX | 59 hr |
| Aug 15, 12:21 PM PDT | Heat Advisory | HNX | 5 days |
| Aug 29, 12:29 AM PDT | Excessive Heat Watch | HNX | 24 hr |
| Aug 30, 12:52 AM PDT | Excessive Heat Warning | HNX | 11 days |
| Sep 18, 9:54 AM PDT | Wind Advisory | HNX | 14 hr |
| Nov 8, 1:17 AM PST | Wind Advisory | HNX | 21 hr |
| Nov 9, 2:02 PM PST | Dense Fog Advisory | HNX | 18 hr |
| Nov 10, 1:20 PM PST | Dense Fog Advisory | HNX | 20 hr |
| Nov 21, 12:18 PM PST | Freeze Warning | HNX | 20 hr |
| Nov 22, 11:00 AM PST | Freeze Warning | HNX | 21 hr |
| Nov 28, 1:32 AM PST | Freeze Watch | HNX | 24 hr |
| Nov 29, 1:23 AM PST | Freeze Warning | HNX | 31 hr |
| Dec 1, 9:15 PM PST | Dense Fog Advisory | HNX | 12 hr |
| Dec 6, 3:19 PM PST | Special Weather Statement | HNX | 41 min |
| Dec 7, 1:28 AM PST | Dense Fog Advisory | HNX | 10 hr |
| Dec 7, 12:43 PM PST | Dense Fog Advisory | HNX | 22 hr |
| Dec 9, 12:59 PM PST | Wind Advisory | HNX | 45 hr |
| Dec 10, 10:47 PM PST | Areal Flood Advisory | HNX | 6 hr |
| Dec 12, 1:52 PM PST | Freeze Watch | HNX | 22 hr |
| Dec 13, 11:22 AM PST | Freeze Warning | HNX | 6 days |
| Dec 15, 6:51 AM PST | Dense Fog Advisory | HNX | 5 hr |
| Dec 15, 11:48 AM PST | Dense Fog Advisory | HNX | 24 hr |
| Dec 16, 12:13 PM PST | Dense Fog Advisory | HNX | 46 hr |
| Dec 18, 5:00 PM PST | Dense Fog Advisory | HNX | 17 hr |
| Dec 20, 9:18 PM PST | Dense Fog Advisory | HNX | 14 hr |
| Dec 23, 1:42 AM PST | Dense Fog Advisory | HNX | 10 hr |
| Dec 23, 12:03 PM PST | Dense Fog Advisory | HNX | 25 hr |
| Dec 24, 12:48 PM PST | Dense Fog Advisory | HNX | 24 hr |
| Dec 25, 1:02 PM PST | Dense Fog Advisory | HNX | 22 hr |
| Dec 26, 7:34 PM PST | Flood Watch | HNX | 23 hr |
| Dec 27, 9:50 AM PST | Areal Flood Advisory | HNX | 3 hr |
| Dec 28, 5:18 AM PST | Dense Fog Advisory | HNX | 5 hr |
| Dec 28, 9:35 AM PST | Flood Watch | HNX | 4 days |
| Dec 31, 12:10 AM PST | Wind Advisory | HNX | 24 hr |
| Dec 31, 11:07 AM PST | Areal Flood Advisory | HNX | 5 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 2 |
| Special Weather Statement | 6 |
| Flooding | |
| Flood Watch | 2 |
| Areal Flood Advisory | 4 |
| Heat | |
| Excessive Heat Warning | 3 |
| Excessive Heat Watch | 3 |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 4 |
| Wind and dust | |
| Wind Advisory | 9 |
| Fog and smoke | |
| Dense Fog Advisory | 24 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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.