Alert archive / Arizona / Yuma County
Weather alerts in Yuma County, Arizona, 2020
84 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Yuma County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 84
- Warnings
- 28
- Watches
- 17
- Advisories
- 25
- Busiest month
- August30 alerts
- Busiest day
- August 17, 20206 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Yuma County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 0 | 100% | 0 | ||
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 21, 8:54 PM MST | Dense Fog Advisory | PSR | 14 hr |
| Feb 2, 2:20 AM MST | Freeze Watch | PSR | 26 hr |
| Feb 2, 2:20 AM MST | Freeze Watch | PSR | 26 hr |
| Feb 3, 4:18 AM MST | Freeze Warning | PSR | 53 hr |
| Feb 10, 1:14 PM MST | Areal Flood Advisory | PSR | 4 hr |
| Feb 11, 3:44 AM MST | Areal Flood Advisory | PSR | 2 hr |
| Feb 11, 4:30 AM MST | Dense Fog Advisory | PSR | 4 hr |
| Mar 2, 3:26 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Mar 10, 7:04 PM MST | Areal Flood Advisory | PSR | 4 hr |
| Mar 11, 3:59 AM MST | Flash Flood Watch | PSR | 64 hr |
| Mar 12, 6:29 AM MST | Areal Flood Advisory | PSR | 2 hr |
| Mar 12, 7:02 AM MST | Areal Flood Advisory | PSR | 3 hr |
| Mar 12, 4:06 PM MST | Mesoscale Discussion | SPC | 84 min |
| Mar 12, 6:48 PM MST | Flash Flood Warning | PSR | 4 hr |
| Mar 18, 12:47 PM MST | Special Weather Statement | PSR | 28 min |
| Mar 18, 1:17 PM MST | Mesoscale Discussion | SPC | 2 hr |
| Mar 18, 1:29 PM MST | Flash Flood Warning | PSR | 4 hr |
| Apr 6, 1:22 PM MST | Flash Flood Watch | PSR | 53 hr |
| Apr 24, 1:32 PM MST | Excessive Heat Warning | PSR | 71 hr |
| Apr 25, 1:37 PM MST | Excessive Heat Watch | PSR | 38 hr |
| Apr 27, 3:44 AM MST | Excessive Heat Warning | PSR | 4 days |
| May 4, 1:55 PM MST | Excessive Heat Watch | PSR | 13 hr |
| May 5, 2:36 AM MST | Excessive Heat Warning | PSR | 65 hr |
| May 22, 3:32 AM MST | Excessive Heat Watch | PSR | 47 hr |
| May 24, 2:55 AM MST | Excessive Heat Warning | PSR | 8 days |
| Jun 1, 2:36 AM MST | Excessive Heat Watch | PSR | 23 hr |
| Jun 2, 2:04 AM MST | Excessive Heat Warning | PSR | 66 hr |
| Jun 26, 3:54 AM MST | Fire Weather Watch | PSR | 23 hr |
| Jun 26, 3:54 AM MST | Fire Weather Watch | PSR | 23 hr |
| Jun 27, 2:52 AM MST | Red Flag Warning | PSR | 41 hr |
| Jun 27, 2:52 AM MST | Red Flag Warning | PSR | 65 hr |
| Jul 6, 2:31 PM MST | Excessive Heat Watch | PSR | 48 hr |
| Jul 8, 2:19 PM MST | Excessive Heat Warning | PSR | 5 days |
| Jul 18, 3:32 AM MST | Excessive Heat Warning | PSR | 40 hr |
| Jul 27, 1:17 AM MST | Excessive Heat Watch | PSR | 26 hr |
| Jul 28, 2:57 AM MST | Excessive Heat Warning | PSR | 8 days |
| Aug 10, 2:20 AM MST | Excessive Heat Watch | PSR | 35 hr |
| Aug 11, 1:27 PM MST | Excessive Heat Warning | PSR | 9 days |
| Aug 11, 7:38 PM MST | Dust Storm Advisory | PSR | 67 min |
| Aug 16, 7:29 PM MST | Dust Storm Warning | PSR | 61 min |
| Aug 16, 8:03 PM MST | Dust Storm Advisory | PSR | 57 min |
| Aug 16, 8:30 PM MST | Dust Storm Warning | PSR | 60 min |
| Aug 16, 8:31 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Aug 16, 9:29 PM MST | Dust Storm Advisory | PSR | 61 min |
| Aug 16, 10:17 PM MST | Dust Storm Advisory | PSR | 58 min |
| Aug 17, 9:49 PM MST | Special Weather Statement | PSR | 86 min |
| Aug 17, 10:46 PM MST | Dust Storm Warning | PSR | 89 min |
| Aug 17, 11:44 PM MST | Dust Storm Advisory | PSR | 61 min |
| Aug 18, 12:26 AM MST | Special Weather Statement | PSR | 49 min |
| Aug 18, 7:21 PM MST | Areal Flood Advisory | PSR | 84 min |
| Aug 20, 10:32 PM MST | Dust Storm Advisory | PSR | 88 min |
| Aug 21, 3:20 AM MST | Excessive Heat Watch | PSR | 47 hr |
| Aug 23, 2:25 AM MST | Excessive Heat Warning | PSR | 6 days |
| Aug 24, 9:38 AM MST | Blowing Dust Advisory | PSR | 11 hr |
| Aug 24, 4:47 PM MST | Special Weather Statement | PSR | 43 min |
| Aug 24, 5:11 PM MST | Special Weather Statement | PSR | 34 min |
| Aug 24, 5:16 PM MST | Special Weather Statement | PSR | 29 min |
| Aug 24, 5:45 PM MST | Special Weather Statement | PSR | 45 min |
| Aug 24, 6:40 PM MST | Special Weather Statement | PSR | 35 min |
| Aug 28, 1:48 AM MST | Excessive Heat Warning | PSR | 18 hr |
| Aug 30, 2:35 PM MST | Special Weather Statement | PSR | 25 min |
| Aug 30, 2:49 PM MST | Severe Thunderstorm Warning | PSR | 26 min |
| Aug 30, 3:25 PM MST | Special Weather Statement | PSR | 50 min |
| Aug 30, 3:45 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Aug 30, 3:55 PM MST | Special Weather Statement | PSR | 50 min |
| Aug 30, 4:48 PM MST | Special Weather Statement | PSR | 42 min |
| Sep 1, 2:23 AM MST | Excessive Heat Watch | PSR | 35 hr |
| Sep 2, 1:33 PM MST | Excessive Heat Warning | PSR | 5 days |
| Sep 6, 2:44 PM MST | Red Flag Warning | PSR | 57 hr |
| Sep 6, 2:44 PM MST | Wind Advisory | PSR | 55 hr |
| Sep 9, 10:15 AM MST | Red Flag Warning | PSR | 7 hr |
| Sep 15, 1:57 PM MST | Excessive Heat Warning | PSR | 54 hr |
| Sep 21, 4:35 PM MST | Dust Storm Advisory | PSR | 55 min |
| Oct 24, 1:59 PM MST | Wind Advisory | PSR | 55 hr |
| Oct 24, 2:03 PM MST | Fire Weather Watch | PSR | 24 hr |
| Oct 25, 2:17 PM MST | Red Flag Warning | PSR | 31 hr |
| Oct 26, 4:02 AM MST | Blowing Dust Advisory | PSR | 13 hr |
| Oct 26, 9:07 PM MST | Red Flag Warning | PSR | 17 hr |
| Dec 2, 2:01 AM MST | Freeze Watch | PSR | 24 hr |
| Dec 3, 1:44 AM MST | Freeze Warning | PSR | 30 hr |
| Dec 3, 1:21 PM MST | Freeze Warning | PSR | 43 hr |
| Dec 12, 7:17 AM MST | Dense Fog Advisory | PSR | 3 hr |
| Dec 12, 10:09 AM MST | Dense Fog Advisory | PSR | 51 min |
| Dec 12, 11:03 AM MST | Dense Fog Advisory | PSR | 50 min |
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 | 1 |
| Mesoscale Discussion | 2 |
| Special Weather Statement | 12 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 9 |
| Heat | |
| Excessive Heat Warning | 13 |
| Excessive Heat Watch | 9 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 3 |
| Wind and dust | |
| Dust Storm Warning | 3 |
| Blowing Dust Advisory | 2 |
| Dust Storm Advisory | 7 |
| Wind Advisory | 2 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
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.