Alert archive / Arizona / Graham County
Weather alerts in Graham County, Arizona, 2020
86 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Graham County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 86
- Warnings
- 36
- Watches
- 20
- Advisories
- 17
- Busiest month
- August31 alerts
- Busiest day
- August 2, 20207 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Graham County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 1 | 93% | 5 | 20% | 31 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Tucson, AZ: severe thunderstorm warnings | 79 | 12 | 85% | 30 | 57% | 14 min |
| NWS Tucson, AZ: flash flood warnings | 34 | 6 | 82% | 10 | 100% | 74 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 17, 4:10 AM MST | Dense Fog Advisory | TWC | 5 hr |
| Jan 23, 5:00 AM MST | Dense Fog Advisory | TWC | 5 hr |
| Feb 1, 2:58 PM MST | High Wind Watch | TWC | 22 hr |
| Feb 2, 12:42 PM MST | Wind Advisory | TWC | 30 hr |
| Feb 9, 2:19 PM MST | Winter Weather Advisory | TWC | 58 hr |
| Feb 21, 10:31 AM MST | Flash Flood Watch | TWC | 34 hr |
| Mar 16, 2:59 PM MST | Winter Storm Watch | TWC | 23 hr |
| Mar 17, 2:26 PM MST | Winter Storm Warning | TWC | 36 hr |
| Mar 17, 2:26 PM MST | Winter Weather Advisory | TWC | 36 hr |
| Apr 13, 1:03 AM MST | Wind Advisory | TWC | 19 hr |
| Apr 18, 4:55 AM MST | Red Flag Warning | TWC | 14 hr |
| Apr 19, 2:04 PM MST | Fire Weather Watch | TWC | 36 hr |
| Apr 21, 2:20 AM MST | Red Flag Warning | TWC | 17 hr |
| Apr 27, 1:40 PM MST | Excessive Heat Warning | TWC | 3 days |
| May 5, 3:10 AM MST | Excessive Heat Warning | TWC | 41 hr |
| May 6, 9:25 AM MST | Excessive Heat Warning | TWC | 35 hr |
| May 23, 2:36 PM MST | Excessive Heat Watch | TWC | 47 hr |
| May 25, 1:14 PM MST | Excessive Heat Warning | TWC | 6 days |
| Jun 1, 2:36 AM MST | Excessive Heat Watch | TWC | 24 hr |
| Jun 2, 2:41 AM MST | Excessive Heat Warning | TWC | 4 days |
| Jun 6, 2:30 AM MST | Red Flag Warning | TWC | 16 hr |
| Jun 7, 3:05 AM MST | Fire Weather Watch | TWC | 12 hr |
| Jun 7, 2:40 PM MST | Red Flag Warning | TWC | 28 hr |
| Jun 16, 3:10 PM MST | Red Flag Warning | TWC | 29 hr |
| Jun 26, 4:54 AM MST | Fire Weather Watch | TWC | 23 hr |
| Jun 26, 4:54 AM MST | Fire Weather Watch | TWC | 23 hr |
| Jun 27, 3:40 AM MST | Red Flag Warning | TWC | 40 hr |
| Jun 27, 3:40 AM MST | Red Flag Warning | TWC | 64 hr |
| Jun 29, 2:28 AM MST | Wind Advisory | TWC | 18 hr |
| Jul 6, 2:20 PM MST | Excessive Heat Watch | TWC | 48 hr |
| Jul 8, 2:02 PM MST | Excessive Heat Warning | TWC | 5 days |
| Jul 14, 2:04 PM MST | Special Weather Statement | TWC | 41 min |
| Jul 21, 5:00 PM MST | Special Weather Statement | TWC | 30 min |
| Jul 22, 1:35 PM MST | Flash Flood Watch | TWC | 53 hr |
| Jul 24, 12:27 PM MST | Areal Flood Advisory | TWC | 3 hr |
| Jul 26, 5:54 PM MST | Special Weather Statement | TWC | 36 min |
| Jul 26, 7:18 PM MST | Special Weather Statement | TWC | 27 min |
| Jul 26, 7:31 PM MST | Areal Flood Advisory | TWC | 6 hr |
| Jul 26, 8:14 PM MST | Areal Flood Advisory | TWC | 3 hr |
| Jul 27, 2:25 AM MST | Excessive Heat Watch | TWC | 24 hr |
| Jul 28, 2:30 AM MST | Excessive Heat Warning | TWC | 5 days |
| Aug 1, 2:41 PM MST | Severe Thunderstorm Warning | TWC | 49 min |
| Aug 1, 4:04 PM MST | Severe Thunderstorm Warning | TWC | 41 min |
| Aug 1, 4:46 PM MST | Severe Thunderstorm Warning | TWC | 44 min |
| Aug 1, 4:49 PM MST | Special Weather Statement | TWC | 26 min |
| Aug 1, 5:06 PM MST | Areal Flood Advisory | TWC | 114 min |
| Aug 1, 5:19 PM MST | Severe Thunderstorm Warning | TWC | 41 min |
| Aug 1, 6:02 PM MST | Severe Thunderstorm Warning | TWC | 43 min |
| Aug 1, 6:13 PM MST | Flash Flood Warning | TWC | 107 min |
| Aug 1, 6:26 PM MST | Severe Thunderstorm Warning | TWC | 49 min |
| Aug 1, 6:58 PM MST | Areal Flood Advisory | TWC | 2 hr |
| Aug 2, 4:45 PM MST | Special Weather Statement | TWC | 30 min |
| Aug 10, 2:19 AM MST | Excessive Heat Watch | TWC | 36 hr |
| Aug 11, 2:22 PM MST | Excessive Heat Warning | TWC | 8 days |
| Aug 15, 4:53 PM MST | Severe Thunderstorm Warning | TWC | 52 min |
| Aug 15, 5:26 PM MST | Special Weather Statement | TWC | 49 min |
| Aug 16, 1:21 PM MST | Mesoscale Discussion | SPC | 114 min |
| Aug 17, 3:28 PM MST | Special Weather Statement | TWC | 62 min |
| Aug 17, 4:48 PM MST | Mesoscale Discussion | SPC | 87 min |
| Aug 17, 4:55 PM MST | Special Weather Statement | TWC | 65 min |
| Aug 17, 5:29 PM MST | Severe Thunderstorm Warning | TWC | 46 min |
| Aug 18, 1:49 PM MST | Mesoscale Discussion | SPC | 116 min |
| Aug 20, 3:04 PM MST | Mesoscale Discussion | SPC | 56 min |
| Aug 21, 4:38 PM MST | Severe Thunderstorm Warning | TWC | 37 min |
| Aug 22, 2:56 AM MST | Excessive Heat Watch | TWC | 23 hr |
| Aug 22, 5:46 PM MST | Severe Thunderstorm Warning | TWC | 59 min |
| Aug 22, 5:55 PM MST | Severe Thunderstorm Warning | TWC | 37 min |
| Aug 22, 6:21 PM MST | Severe Thunderstorm Warning | TWC | 54 min |
| Aug 22, 6:26 PM MST | Areal Flood Advisory | TWC | 2 hr |
| Aug 22, 6:46 PM MST | Severe Thunderstorm Warning | TWC | 59 min |
| Aug 23, 2:19 AM MST | Excessive Heat Warning | TWC | 5 days |
| Aug 28, 2:01 PM MST | Flash Flood Watch | TWC | 54 hr |
| Sep 1, 3:00 AM MST | Excessive Heat Watch | TWC | 35 hr |
| Sep 2, 2:18 PM MST | Excessive Heat Warning | TWC | 5 days |
| Sep 8, 7:46 PM MST | Severe Thunderstorm Warning | TWC | 59 min |
| Oct 25, 3:11 AM MST | Freeze Watch | TWC | 24 hr |
| Oct 25, 3:11 AM MST | Freeze Watch | TWC | 24 hr |
| Oct 25, 3:19 PM MST | Hard Freeze Watch | TWC | 12 hr |
| Oct 25, 3:19 PM MST | Hard Freeze Watch | TWC | 12 hr |
| Oct 26, 3:31 AM MST | Freeze Warning | TWC | 28 hr |
| Oct 26, 3:31 AM MST | Hard Freeze Warning | TWC | 28 hr |
| Oct 26, 3:31 AM MST | Hard Freeze Warning | TWC | 52 hr |
| Nov 6, 2:03 PM MST | Wind Advisory | TWC | 28 hr |
| Nov 8, 2:50 AM MST | Winter Weather Advisory | TWC | 32 hr |
| Nov 29, 1:59 PM MST | Wind Advisory | TWC | 22 hr |
| Dec 3, 4:42 AM MST | Wind Advisory | TWC | 10 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 | 14 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 9 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 3 |
| Heat | |
| Excessive Heat Warning | 10 |
| Excessive Heat Watch | 7 |
| Cold | |
| Freeze Warning | 1 |
| Hard Freeze Warning | 2 |
| Freeze Watch | 2 |
| Hard Freeze Watch | 2 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 7 |
| Fire Weather Watch | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
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.