Alert archive / Alabama / Shelby County
Weather alerts in Shelby County, Alabama, 2023
215 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Shelby County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 215
- Warnings
- 52
- Watches
- 34
- Advisories
- 54
- Busiest month
- August56 alerts
- Busiest day
- August 6, 202312 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Shelby County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 31 | 22 | 29% | 31 | 74% | 20 min |
| Flash flood warnings | 4 | 4 | 0% | 4 | 100% | 75 min |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Birmingham, AL: tornado warnings | 44 | 25 | 43% | 93 | 72% | 27 min |
| NWS Birmingham, AL: severe thunderstorm warnings | 451 | 311 | 31% | 916 | 74% | 23 min |
| NWS Birmingham, AL: flash flood warnings | 23 | 17 | 26% | 40 | 93% | 83 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 1, 6:15 PM CST | Dense Fog Advisory | BMX | 15 hr |
| Jan 3, 1:42 AM CST | Flood Watch | BMX | 34 hr |
| Jan 3, 9:14 AM CST | Tornado Watch | SPC | 8 hr |
| Jan 3, 11:38 AM CST | Mesoscale Discussion | SPC | 97 min |
| Jan 3, 2:07 PM CST | Mesoscale Discussion | SPC | 113 min |
| Jan 3, 6:40 PM CST | Areal Flood Advisory | BMX | 3 hr |
| Jan 3, 7:45 PM CST | Mesoscale Discussion | SPC | 90 min |
| Jan 3, 9:38 PM CST | Areal Flood Advisory | BMX | 4 hr |
| Jan 3, 10:05 PM CST | Tornado Watch | SPC | 6 hr |
| Jan 3, 11:32 PM CST | Flash Flood Warning | BMX | 3 hr |
| Jan 4, 1:17 AM CST | Special Weather Statement | BMX | 43 min |
| Jan 4, 5:15 AM CST | Areal Flood Advisory | BMX | 6 hr |
| Jan 10, 4:41 AM CST | Freezing Fog Advisory | BMX | 3 hr |
| Jan 11, 2:17 PM CST | Wind Advisory | BMX | 31 hr |
| Jan 12, 6:59 AM CST | Tornado Watch | SPC | 7 hr |
| Jan 12, 11:19 AM CST | Severe Thunderstorm Warning | BMX | 41 min |
| Jan 12, 12:17 PM CST | Severe Thunderstorm Warning | BMX | 43 min |
| Jan 17, 6:06 PM CST | Dense Fog Advisory | BMX | 16 hr |
| Jan 18, 1:53 PM CST | Wind Advisory | BMX | 16 hr |
| Jan 19, 1:37 PM CST | Wind Advisory | BMX | 5 hr |
| Jan 23, 2:02 PM CST | Wind Advisory | BMX | 46 hr |
| Feb 8, 3:42 AM CST | Wind Advisory | BMX | 29 hr |
| Feb 11, 2:31 AM CST | Wind Advisory | BMX | 27 hr |
| Feb 16, 1:17 PM CST | Mesoscale Discussion | SPC | 88 min |
| Feb 16, 1:50 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 16, 5:56 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 16, 8:56 PM CST | Areal Flood Advisory | BMX | 4 hr |
| Feb 22, 2:12 AM CST | Wind Advisory | BMX | 19 hr |
| Feb 26, 2:23 AM CST | Wind Advisory | BMX | 41 hr |
| Mar 2, 4:01 AM CST | Wind Advisory | BMX | 40 hr |
| Mar 3, 10:34 AM CST | Tornado Watch | SPC | 5 hr |
| Mar 3, 12:05 PM CST | Severe Thunderstorm Warning | BMX | 74 min |
| Mar 12, 3:08 PM CDT | Freeze Watch | BMX | 36 hr |
| Mar 13, 2:52 AM CDT | Freeze Warning | BMX | 31 hr |
| Mar 14, 3:02 AM CDT | Freeze Warning | BMX | 30 hr |
| Mar 15, 3:19 AM CDT | Frost Advisory | BMX | 29 hr |
| Mar 17, 4:15 AM CDT | Freeze Watch | BMX | 23 hr |
| Mar 18, 3:27 AM CDT | Freeze Warning | BMX | 31 hr |
| Mar 18, 3:27 AM CDT | Freeze Warning | BMX | 55 hr |
| Mar 19, 4:21 AM CDT | Freeze Watch | BMX | 22 hr |
| Mar 20, 2:06 AM CDT | Freeze Warning | BMX | 30 hr |
| Mar 24, 12:07 PM CDT | Wind Advisory | BMX | 19 hr |
| Mar 24, 11:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Mar 26, 12:59 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 26, 4:01 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Mar 26, 4:34 AM CDT | Special Weather Statement | BMX | 41 min |
| Mar 26, 4:44 AM CDT | Severe Thunderstorm Warning | BMX | 46 min |
| Mar 26, 6:19 AM CDT | Mesoscale Discussion | SPC | 56 min |
| Mar 26, 10:13 AM CDT | Flood Watch | BMX | 27 hr |
| Mar 26, 5:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Mar 26, 5:49 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 27, 3:41 AM CDT | Areal Flood Advisory | BMX | 4 hr |
| Mar 27, 4:15 AM CDT | Flash Flood Warning | BMX | 4 hr |
| Mar 31, 2:22 AM CDT | Wind Advisory | BMX | 41 hr |
| Apr 1, 3:19 AM CDT | Tornado Watch | SPC | 5 hr |
| Apr 1, 6:18 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Apr 13, 10:04 AM CDT | Wind Advisory | BMX | 9 hr |
| Apr 15, 1:07 AM CDT | Dense Fog Advisory | BMX | 8 hr |
| Apr 30, 2:06 AM CDT | Areal Flood Advisory | BMX | 4 hr |
| May 2, 2:19 AM CDT | Wind Advisory | BMX | 17 hr |
| May 15, 6:11 PM CDT | Special Weather Statement | BMX | 34 min |
| May 15, 6:36 PM CDT | Special Weather Statement | BMX | 39 min |
| May 16, 12:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 1:14 PM CDT | Special Weather Statement | BMX | 31 min |
| May 16, 1:19 PM CDT | Severe Thunderstorm Warning | BMX | 41 min |
| May 16, 1:36 PM CDT | Special Weather Statement | BMX | 24 min |
| May 16, 1:43 PM CDT | Severe Thunderstorm Warning | BMX | 47 min |
| May 17, 3:47 PM CDT | Special Weather Statement | BMX | 28 min |
| May 17, 4:22 PM CDT | Special Weather Statement | BMX | 38 min |
| May 17, 5:12 PM CDT | Special Weather Statement | BMX | 33 min |
| May 18, 7:03 AM CDT | Dense Fog Advisory | BMX | 117 min |
| May 20, 1:35 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 4, 4:40 PM CDT | Special Weather Statement | BMX | 20 min |
| Jun 11, 6:46 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 11, 9:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 11, 11:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 11, 11:11 PM CDT | Severe Thunderstorm Warning | BMX | 45 min |
| Jun 14, 2:34 AM CDT | Flood Watch | BMX | 39 hr |
| Jun 14, 3:07 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 14, 3:30 AM CDT | Severe Thunderstorm Warning | BMX | 24 min |
| Jun 14, 6:22 AM CDT | Areal Flood Advisory | BMX | 2 hr |
| Jun 14, 9:40 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 10:09 AM CDT | Tornado Watch | SPC | 7 hr |
| Jun 14, 1:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 14, 1:59 PM CDT | Severe Thunderstorm Warning | BMX | 36 min |
| Jun 14, 11:54 PM CDT | Special Weather Statement | BMX | 21 min |
| Jun 15, 8:39 AM CDT | Areal Flood Advisory | BMX | 61 min |
| Jun 16, 6:05 PM CDT | Severe Thunderstorm Warning | BMX | 55 min |
| Jun 16, 7:45 PM CDT | Special Weather Statement | BMX | 45 min |
| Jun 17, 3:29 AM CDT | Dense Fog Advisory | BMX | 7 hr |
| Jun 17, 5:53 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 2:25 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 25, 2:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 25, 5:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 25, 5:26 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 25, 6:35 PM CDT | Severe Thunderstorm Warning | BMX | 55 min |
| Jun 25, 8:10 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 25, 11:13 PM CDT | Special Weather Statement | BMX | 47 min |
| Jun 25, 11:46 PM CDT | Special Weather Statement | BMX | 59 min |
| Jun 27, 3:22 AM CDT | Excessive Heat Watch | BMX | 24 hr |
| Jun 28, 3:00 AM CDT | Excessive Heat Warning | BMX | 4 days |
| Jun 28, 3:00 AM CDT | Heat Advisory | BMX | 5 days |
| Jul 1, 12:22 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 1, 4:43 PM CDT | Special Weather Statement | BMX | 47 min |
| Jul 1, 5:05 PM CDT | Special Weather Statement | BMX | 25 min |
| Jul 1, 5:29 PM CDT | Severe Thunderstorm Warning | BMX | 24 min |
| Jul 2, 12:14 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 2, 3:11 PM CDT | Severe Thunderstorm Warning | BMX | 49 min |
| Jul 2, 3:56 PM CDT | Severe Thunderstorm Warning | BMX | 64 min |
| Jul 2, 4:35 PM CDT | Special Weather Statement | BMX | 25 min |
| Jul 2, 8:33 PM CDT | Severe Thunderstorm Warning | BMX | 30 min |
| Jul 3, 5:50 PM CDT | Special Weather Statement | BMX | 40 min |
| Jul 8, 11:58 AM CDT | Special Weather Statement | BMX | 32 min |
| Jul 9, 6:04 PM CDT | Areal Flood Advisory | BMX | 3 hr |
| Jul 9, 6:48 PM CDT | Areal Flood Advisory | BMX | 2 hr |
| Jul 9, 6:59 PM CDT | Flash Flood Warning | BMX | 3 hr |
| Jul 14, 12:14 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 14, 4:58 PM CDT | Special Weather Statement | BMX | 32 min |
| Jul 14, 5:29 PM CDT | Special Weather Statement | BMX | 31 min |
| Jul 14, 5:30 PM CDT | Areal Flood Advisory | BMX | 3 hr |
| Jul 14, 5:46 PM CDT | Areal Flood Advisory | BMX | 3 hr |
| Jul 14, 6:02 PM CDT | Flash Flood Warning | BMX | 61 min |
| Jul 15, 1:35 AM CDT | Heat Advisory | BMX | 19 hr |
| Jul 18, 2:48 PM CDT | Heat Advisory | BMX | 3 days |
| Jul 18, 9:55 PM CDT | Severe Thunderstorm Warning | BMX | 50 min |
| Jul 19, 2:07 PM CDT | Special Weather Statement | BMX | 23 min |
| Jul 19, 2:26 PM CDT | Special Weather Statement | BMX | 34 min |
| Jul 21, 3:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 4:55 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 21, 5:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 21, 6:04 PM CDT | Severe Thunderstorm Warning | BMX | 44 min |
| Jul 21, 6:37 PM CDT | Special Weather Statement | BMX | 38 min |
| Jul 27, 1:48 PM CDT | Heat Advisory | BMX | 3 days |
| Jul 29, 3:52 PM CDT | Special Weather Statement | BMX | 38 min |
| Jul 30, 12:06 PM CDT | Special Weather Statement | BMX | 39 min |
| Jul 31, 3:10 AM CDT | Dense Fog Advisory | BMX | 5 hr |
| Aug 2, 9:29 PM CDT | Heat Advisory | BMX | 46 hr |
| Aug 3, 4:11 AM CDT | Flood Watch | BMX | 36 hr |
| Aug 3, 12:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 3, 2:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 3, 3:01 PM CDT | Severe Thunderstorm Warning | BMX | 74 min |
| Aug 3, 3:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 3:52 PM CDT | Severe Thunderstorm Warning | BMX | 68 min |
| Aug 4, 6:11 AM CDT | Areal Flood Advisory | BMX | 4 hr |
| Aug 5, 5:44 AM CDT | Dense Fog Advisory | BMX | 2 hr |
| Aug 5, 1:04 PM CDT | Heat Advisory | BMX | 52 hr |
| Aug 6, 3:00 AM CDT | Excessive Heat Warning | BMX | 18 hr |
| Aug 6, 3:00 AM CDT | Heat Advisory | BMX | 31 hr |
| Aug 6, 11:49 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 6, 1:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 6, 2:23 PM CDT | Special Weather Statement | BMX | 52 min |
| Aug 6, 2:35 PM CDT | Special Weather Statement | BMX | 25 min |
| Aug 6, 2:37 PM CDT | Severe Thunderstorm Warning | BMX | 68 min |
| Aug 6, 2:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 6, 3:02 PM CDT | Special Weather Statement | BMX | 28 min |
| Aug 6, 3:05 PM CDT | Severe Thunderstorm Warning | BMX | 70 min |
| Aug 6, 3:41 PM CDT | Severe Thunderstorm Warning | BMX | 64 min |
| Aug 6, 4:25 PM CDT | Severe Thunderstorm Warning | BMX | 65 min |
| Aug 6, 9:16 PM CDT | Excessive Heat Warning | BMX | 24 hr |
| Aug 7, 10:40 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 7, 1:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 3:06 PM CDT | Severe Thunderstorm Warning | BMX | 69 min |
| Aug 7, 3:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Aug 7, 3:59 PM CDT | Special Weather Statement | BMX | 31 min |
| Aug 8, 11:51 AM CDT | Special Weather Statement | BMX | 39 min |
| Aug 9, 2:43 AM CDT | Dense Fog Advisory | BMX | 6 hr |
| Aug 9, 6:50 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 9, 7:26 PM CDT | Severe Thunderstorm Warning | BMX | 64 min |
| Aug 9, 8:11 PM CDT | Severe Thunderstorm Warning | BMX | 64 min |
| Aug 9, 8:50 PM CDT | Severe Thunderstorm Warning | BMX | 55 min |
| Aug 10, 6:34 AM CDT | Special Weather Statement | BMX | 26 min |
| Aug 10, 7:00 AM CDT | Areal Flood Advisory | BMX | 3 hr |
| Aug 11, 3:58 AM CDT | Heat Advisory | BMX | 17 hr |
| Aug 11, 4:11 AM CDT | Special Weather Statement | BMX | 49 min |
| Aug 11, 5:10 AM CDT | Special Weather Statement | BMX | 35 min |
| Aug 11, 12:10 PM CDT | Excessive Heat Warning | BMX | 3 days |
| Aug 11, 7:41 PM CDT | Severe Thunderstorm Warning | BMX | 49 min |
| Aug 11, 8:06 PM CDT | Severe Thunderstorm Warning | BMX | 41 min |
| Aug 12, 9:39 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 10:50 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 12, 5:18 PM CDT | Special Weather Statement | BMX | 42 min |
| Aug 12, 5:49 PM CDT | Special Weather Statement | BMX | 41 min |
| Aug 13, 7:26 PM CDT | Special Weather Statement | BMX | 49 min |
| Aug 20, 2:29 PM CDT | Heat Advisory | BMX | 7 days |
| Aug 22, 2:25 PM CDT | Excessive Heat Warning | BMX | 3 days |
| Aug 23, 2:14 AM CDT | Heat Advisory | BMX | 5 days |
| Aug 27, 12:52 PM CDT | Special Weather Statement | BMX | 38 min |
| Aug 27, 1:05 PM CDT | Special Weather Statement | BMX | 25 min |
| Aug 28, 2:22 PM CDT | Special Weather Statement | BMX | 53 min |
| Aug 28, 2:27 PM CDT | Areal Flood Advisory | BMX | 3 hr |
| Aug 28, 3:08 PM CDT | Special Weather Statement | BMX | 52 min |
| Aug 28, 3:12 PM CDT | Areal Flood Advisory | BMX | 3 hr |
| Sep 6, 5:39 PM CDT | Special Weather Statement | BMX | 36 min |
| Sep 12, 7:42 PM CDT | Special Weather Statement | BMX | 33 min |
| Sep 16, 9:08 PM CDT | Areal Flood Advisory | BMX | 2 hr |
| Sep 17, 4:20 AM CDT | Dense Fog Advisory | BMX | 5 hr |
| Oct 5, 1:38 PM CDT | Red Flag Warning | BMX | 53 hr |
| Oct 7, 1:16 PM CDT | Red Flag Warning | BMX | 30 hr |
| Oct 21, 3:53 AM CDT | Red Flag Warning | BMX | 15 hr |
| Oct 29, 4:47 PM CDT | Fire Weather Watch | BMX | 20 hr |
| Oct 29, 4:47 PM CDT | Fire Weather Watch | BMX | 58 hr |
| Oct 30, 3:43 AM CDT | Freeze Watch | BMX | 47 hr |
| Oct 30, 12:28 PM CDT | Freeze Warning | BMX | 45 hr |
| Oct 30, 12:37 PM CDT | Red Flag Warning | BMX | 30 hr |
| Oct 31, 2:46 AM CDT | Freeze Watch | BMX | 24 hr |
| Nov 1, 2:17 AM CDT | Freeze Warning | BMX | 31 hr |
| Nov 1, 2:30 AM CDT | Red Flag Warning | BMX | 17 hr |
| Nov 8, 3:48 AM CST | Dense Fog Advisory | BMX | 5 hr |
| Nov 20, 2:22 AM CST | Wind Advisory | BMX | 30 hr |
| Dec 1, 9:01 PM CST | Dense Fog Advisory | BMX | 12 hr |
| Dec 9, 8:29 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 9, 10:10 PM CST | Tornado Watch | SPC | 6 hr |
| Dec 9, 11:53 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 10, 12:44 AM CST | Severe Thunderstorm Warning | BMX | 46 min |
| Dec 10, 1:03 AM CST | Severe Thunderstorm Warning | BMX | 42 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 | 31 |
| Severe Thunderstorm Watch | 13 |
| Tornado Watch | 9 |
| Mesoscale Discussion | 32 |
| Special Weather Statement | 43 |
| Flooding | |
| Flash Flood Warning | 4 |
| Flood Watch | 4 |
| Areal Flood Advisory | 17 |
| Heat | |
| Excessive Heat Warning | 5 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 10 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 5 |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 14 |
| Fire | |
| Red Flag Warning | 5 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.