Alert archive / California / Humboldt County
Weather alerts in Humboldt County, California, 2020
95 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Humboldt County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 95
- Warnings
- 12
- Watches
- 14
- Advisories
- 54
- Busiest month
- November22 alerts
- Busiest day
- April 1, 20203 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Humboldt County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 1 | 0% | |||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Medford, OR: severe thunderstorm warnings | 25 | 4 | 84% | 8 | 63% | 21 min |
| NWS San Francisco Bay Area, CA: severe thunderstorm warnings | 4 | 0 | 100% | 0 | ||
| NWS San Francisco Bay Area, CA: flash flood warnings | 0 | 1 | 0% | |||
| NWS Hanford, CA: tornado warnings | 3 | 0 | 100% | 7 | 0% | |
| NWS Hanford, CA: severe thunderstorm warnings | 7 | 0 | 100% | 2 | 0% | |
| NWS Hanford, CA: flash flood warnings | 17 | 2 | 88% | 8 | 25% | 41 min |
| NWS Los Angeles, CA: severe thunderstorm warnings | 1 | 0 | 100% | 7 | 0% | |
| NWS Los Angeles, CA: flash flood warnings | 8 | 2 | 75% | 2 | 100% | 56 min |
| NWS Reno, NV: tornado warnings | 1 | 1 | 0% | 3 | 33% | 29 min |
| NWS Reno, NV: severe thunderstorm warnings | 34 | 1 | 97% | 8 | 13% | 7 min |
| NWS Reno, NV: flash flood warnings | 21 | 2 | 90% | 5 | 60% | 53 min |
| NWS Sacramento, CA: tornado warnings | 0 | 4 | 0% | |||
| NWS Sacramento, CA: severe thunderstorm warnings | 5 | 2 | 60% | 5 | 60% | 9 min |
| NWS Sacramento, CA: flash flood warnings | 0 | 3 | 0% | |||
| NWS Eureka, CA: severe thunderstorm warnings | 2 | 1 | 50% | 2 | 50% | 2 min |
| NWS San Diego, CA: tornado warnings | 0 | 1 | 0% | |||
| NWS San Diego, CA: severe thunderstorm warnings | 9 | 0 | 100% | 4 | 0% | |
| NWS San Diego, CA: flash flood warnings | 14 | 7 | 50% | 34 | 65% | 91 min |
| NWS Las Vegas, NV: tornado warnings | 1 | 0 | 100% | 1 | 0% | |
| NWS Las Vegas, NV: severe thunderstorm warnings | 15 | 1 | 93% | 13 | 8% | 15 min |
| NWS Las Vegas, NV: flash flood warnings | 23 | 5 | 78% | 15 | 33% | 92 min |
| NWS Phoenix, AZ: tornado warnings | 0 | 1 | 0% | |||
| NWS Phoenix, AZ: severe thunderstorm warnings | 43 | 13 | 70% | 41 | 71% | 15 min |
| NWS Phoenix, AZ: flash flood warnings | 47 | 15 | 68% | 23 | 87% | 100 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 2, 9:20 AM PST | Beach Hazards Statement | EKA | 10 hr |
| Jan 9, 3:00 PM PST | High Surf Advisory | EKA | 52 hr |
| Jan 11, 1:09 PM PST | Coastal Flood Advisory | EKA | 6 hr |
| Jan 12, 2:47 PM PST | Winter Weather Advisory | EKA | 48 hr |
| Jan 13, 2:16 PM PST | Winter Storm Watch | EKA | 24 hr |
| Jan 14, 3:08 AM PST | Wind Advisory | EKA | 43 hr |
| Jan 14, 2:26 PM PST | Winter Storm Warning | EKA | 50 hr |
| Jan 15, 10:48 AM PST | Winter Weather Advisory | EKA | 29 hr |
| Jan 15, 12:38 PM PST | Flood Watch | EKA | 23 hr |
| Jan 20, 2:48 AM PST | Wind Advisory | EKA | 27 hr |
| Jan 30, 5:02 AM PST | Beach Hazards Statement | EKA | 16 hr |
| Feb 3, 1:50 PM PST | Hard Freeze Warning | EKA | 19 hr |
| Feb 29, 2:13 PM PST | Frost Advisory | EKA | 19 hr |
| Mar 1, 2:42 PM PST | Frost Advisory | EKA | 18 hr |
| Mar 12, 2:03 AM PDT | Winter Storm Watch | EKA | 24 hr |
| Mar 13, 2:13 AM PDT | Winter Storm Warning | EKA | 66 hr |
| Mar 13, 3:16 PM PDT | Winter Weather Advisory | EKA | 53 hr |
| Mar 15, 4:31 AM PDT | Frost Advisory | EKA | 28 hr |
| Mar 20, 5:46 AM PDT | Beach Hazards Statement | EKA | 62 hr |
| Mar 21, 4:56 PM PDT | Special Weather Statement | EKA | 19 min |
| Mar 23, 2:13 PM PDT | Winter Weather Advisory | EKA | 30 hr |
| Mar 25, 1:37 PM PDT | Frost Advisory | EKA | 19 hr |
| Mar 26, 3:52 PM PDT | Frost Advisory | EKA | 17 hr |
| Apr 1, 3:23 AM PDT | Freeze Watch | EKA | 11 hr |
| Apr 1, 9:25 AM PDT | Frost Advisory | EKA | 24 hr |
| Apr 1, 2:07 PM PDT | Freeze Warning | EKA | 19 hr |
| Apr 2, 2:08 PM PDT | Frost Advisory | EKA | 19 hr |
| Apr 2, 2:08 PM PDT | Freeze Warning | EKA | 19 hr |
| Apr 5, 10:21 AM PDT | Frost Advisory | EKA | 22 hr |
| Apr 6, 2:13 PM PDT | Frost Advisory | EKA | 19 hr |
| Apr 13, 3:10 PM PDT | Frost Advisory | EKA | 17 hr |
| Apr 16, 2:21 AM PDT | Beach Hazards Statement | EKA | 41 hr |
| Apr 18, 9:35 PM PDT | Beach Hazards Statement | EKA | 47 hr |
| May 3, 1:42 PM PDT | Frost Advisory | EKA | 19 hr |
| May 29, 11:19 AM PDT | Flash Flood Watch | EKA | 28 hr |
| May 30, 12:45 AM PDT | Special Weather Statement | EKA | 45 min |
| May 30, 1:30 AM PDT | Special Weather Statement | EKA | 45 min |
| May 30, 2:11 AM PDT | Special Weather Statement | EKA | 34 min |
| Jun 6, 11:52 PM PDT | Special Weather Statement | EKA | 53 min |
| Jun 7, 4:03 AM PDT | Frost Advisory | EKA | 28 hr |
| Jun 20, 12:29 PM PDT | Excessive Heat Watch | EKA | 27 hr |
| Jun 21, 3:08 PM PDT | Heat Advisory | EKA | 55 hr |
| Jun 24, 3:05 AM PDT | Heat Advisory | EKA | 67 hr |
| Jul 4, 2:24 AM PDT | Beach Hazards Statement | EKA | 42 hr |
| Aug 12, 2:20 PM PDT | Excessive Heat Watch | EKA | 21 hr |
| Aug 13, 11:23 AM PDT | Heat Advisory | EKA | 3 days |
| Sep 1, 2:17 PM PDT | Excessive Heat Watch | EKA | 48 hr |
| Sep 3, 2:01 PM PDT | Excessive Heat Warning | EKA | 5 days |
| Sep 8, 3:33 AM PDT | Heat Advisory | EKA | 11 hr |
| Sep 22, 1:54 PM PDT | Beach Hazards Statement | EKA | 70 hr |
| Sep 27, 9:06 PM PDT | Excessive Heat Watch | EKA | 6 hr |
| Sep 28, 3:30 AM PDT | Heat Advisory | EKA | 15 hr |
| Oct 6, 6:52 AM PDT | Dense Fog Advisory | EKA | 4 hr |
| Oct 6, 10:20 PM PDT | Dense Fog Advisory | EKA | 4 hr |
| Oct 20, 3:24 AM PDT | Freeze Watch | EKA | 31 hr |
| Oct 23, 12:08 PM PDT | High Wind Watch | EKA | 24 hr |
| Oct 24, 3:39 AM PDT | Freeze Watch | EKA | 24 hr |
| Oct 24, 11:45 AM PDT | Hard Freeze Watch | EKA | 16 hr |
| Oct 24, 11:45 AM PDT | Wind Advisory | EKA | 47 hr |
| Oct 25, 4:44 AM PDT | Frost Advisory | EKA | 28 hr |
| Oct 25, 4:44 AM PDT | Freeze Warning | EKA | 28 hr |
| Oct 25, 4:44 AM PDT | Hard Freeze Warning | EKA | 28 hr |
| Oct 26, 2:45 PM PDT | Frost Advisory | EKA | 17 hr |
| Oct 27, 2:55 PM PDT | Frost Advisory | EKA | 17 hr |
| Oct 28, 12:47 PM PDT | Frost Advisory | EKA | 19 hr |
| Oct 29, 1:22 PM PDT | Frost Advisory | EKA | 19 hr |
| Oct 31, 2:04 AM PDT | Beach Hazards Statement | EKA | 64 hr |
| Nov 5, 1:09 AM PST | Dense Fog Advisory | EKA | 8 hr |
| Nov 5, 2:20 AM PST | High Surf Advisory | EKA | 50 hr |
| Nov 7, 2:40 PM PST | Freeze Watch | EKA | 12 hr |
| Nov 8, 3:05 AM PST | Freeze Warning | EKA | 30 hr |
| Nov 8, 3:05 AM PST | Hard Freeze Warning | EKA | 30 hr |
| Nov 9, 12:13 PM PST | Frost Advisory | EKA | 21 hr |
| Nov 10, 3:16 AM PST | Frost Advisory | EKA | 30 hr |
| Nov 12, 12:01 PM PST | Wind Advisory | EKA | 23 hr |
| Nov 14, 2:25 PM PST | Coastal Flood Advisory | EKA | 23 hr |
| Nov 15, 2:16 PM PST | Wind Advisory | EKA | 46 hr |
| Nov 16, 7:44 AM PST | Coastal Flood Advisory | EKA | 5 hr |
| Nov 17, 4:57 AM PST | Coastal Flood Advisory | EKA | 9 hr |
| Nov 19, 3:00 AM PST | Freeze Warning | EKA | 30 hr |
| Nov 20, 9:40 AM PST | Freeze Warning | EKA | 23 hr |
| Nov 21, 2:22 PM PST | Frost Advisory | EKA | 19 hr |
| Nov 23, 2:49 AM PST | High Surf Advisory | EKA | 3 days |
| Nov 25, 2:06 PM PST | Frost Advisory | EKA | 19 hr |
| Nov 26, 2:05 PM PST | Frost Advisory | EKA | 19 hr |
| Nov 27, 2:51 PM PST | Frost Advisory | EKA | 18 hr |
| Nov 28, 2:43 PM PST | Frost Advisory | EKA | 18 hr |
| Nov 30, 3:05 AM PST | Frost Advisory | EKA | 24 hr |
| Nov 30, 3:26 AM PST | Beach Hazards Statement | EKA | 3 days |
| Dec 5, 2:16 PM PST | High Surf Advisory | EKA | 3 days |
| Dec 12, 2:35 AM PST | Coastal Flood Advisory | EKA | 32 hr |
| Dec 13, 1:12 PM PST | Coastal Flood Advisory | EKA | 23 hr |
| Dec 14, 3:12 AM PST | High Surf Advisory | EKA | 57 hr |
| Dec 24, 3:12 AM PST | Wind Advisory | EKA | 39 hr |
| Dec 27, 2:17 PM PST | Beach Hazards Statement | EKA | 58 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 | |
| Special Weather Statement | 5 |
| Flooding | |
| Flash Flood Watch | 1 |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 4 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 4 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 6 |
| Hard Freeze Warning | 3 |
| Freeze Watch | 4 |
| Hard Freeze Watch | 1 |
| Frost Advisory | 25 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Coast and beach | |
| Coastal Flood Advisory | 6 |
| High Surf Advisory | 5 |
| Beach Hazards Statement | 10 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.