Alert archive / Alabama / Marengo County
Weather alerts in Marengo County, Alabama, 2020
154 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Marengo County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 154
- Warnings
- 49
- Watches
- 23
- Advisories
- 30
- Busiest month
- April35 alerts
- Busiest day
- January 11, 20209 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 2 tornado warnings covering Marengo County in 2020 had a tornado report inside them; 1 of 2 tornado reports fell inside a warning, on average 8 minutes after it went out.
Marengo County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 2 | 50% | 8 min |
| Severe thunderstorm warnings | 12 | 6 | 50% | 7 | 57% | 38 min |
| 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 Birmingham, AL: tornado warnings | 40 | 16 | 60% | 62 | 68% | 17 min |
| NWS Birmingham, AL: severe thunderstorm warnings | 206 | 150 | 27% | 663 | 66% | 25 min |
| NWS Birmingham, AL: flash flood warnings | 36 | 27 | 25% | 123 | 82% | 117 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, 7:54 AM CST | River Flood Warning | BMX | 21 days |
| Jan 1, 7:58 AM CST | River Flood Warning | BMX | 21 days |
| Jan 1, 8:20 AM CST | River Flood Warning | BMX | 4 days |
| Jan 1, 8:23 AM CST | River Flood Warning | BMX | 8 days |
| Jan 1, 8:26 AM CST | River Flood Warning | BMX | 9 days |
| Jan 9, 1:49 PM CST | Wind Advisory | BMX | 55 hr |
| Jan 10, 7:50 PM CST | River Flood Warning | BMX | 8 days |
| Jan 11, 7:39 AM CST | Mesoscale Discussion | SPC | 96 min |
| Jan 11, 7:57 AM CST | Tornado Watch | SPC | 9 hr |
| Jan 11, 9:54 AM CST | Mesoscale Discussion | SPC | 96 min |
| Jan 11, 11:27 AM CST | Severe Thunderstorm Warning | BMX | 63 min |
| Jan 11, 11:50 AM CST | Mesoscale Discussion | SPC | 85 min |
| Jan 11, 12:47 PM CST | Severe Thunderstorm Warning | BMX | 58 min |
| Jan 11, 5:24 PM CST | River Flood Warning | BMX | 8 days |
| Jan 11, 5:24 PM CST | River Flood Warning | BMX | 10 days |
| Jan 12, 2:51 AM CST | Dense Fog Advisory | BMX | 6 hr |
| Jan 13, 8:29 AM CST | River Flood Warning | BMX | 5 days |
| Jan 14, 3:03 AM CST | Flash Flood Watch | BMX | 18 hr |
| Jan 15, 3:13 PM CST | Dense Fog Advisory | BMX | 17 hr |
| Jan 28, 12:20 AM CST | Dense Fog Advisory | BMX | 9 hr |
| Jan 29, 3:08 PM CST | Dense Fog Advisory | BMX | 18 hr |
| Feb 4, 8:50 AM CST | River Flood Warning | BMX | 20 days |
| Feb 4, 2:08 PM CST | Flash Flood Watch | BMX | 48 hr |
| Feb 4, 9:54 PM CST | River Flood Warning | BMX | 23 days |
| Feb 5, 9:21 AM CST | River Flood Warning | BMX | 23 days |
| Feb 5, 4:25 PM CST | Tornado Watch | SPC | 5 hr |
| Feb 5, 5:06 PM CST | Mesoscale Discussion | SPC | 84 min |
| Feb 5, 9:43 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 5, 11:15 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 5, 11:48 PM CST | Tornado Watch | SPC | 8 hr |
| Feb 6, 1:19 AM CST | Severe Thunderstorm Warning | BMX | 56 min |
| Feb 6, 2:58 AM CST | Severe Thunderstorm Warning | BMX | 47 min |
| Feb 6, 7:43 AM CST | River Flood Warning | BMX | 44 hr |
| Feb 6, 7:43 AM CST | River Flood Warning | BMX | 60 hr |
| Feb 6, 7:50 AM CST | River Flood Warning | BMX | 19 days |
| Feb 8, 9:26 PM CST | Dense Fog Advisory | BMX | 12 hr |
| Feb 9, 10:59 AM CST | River Flood Warning | BMX | 4 days |
| Feb 9, 10:59 AM CST | River Flood Warning | BMX | 21 days |
| Feb 17, 2:36 AM CST | Dense Fog Advisory | BMX | 6 hr |
| Feb 18, 4:01 PM CST | Mesoscale Discussion | SPC | 89 min |
| Feb 19, 9:11 AM CST | River Flood Warning | BMX | 12 hr |
| Feb 19, 8:27 PM CST | Flash Flood Watch | BMX | 22 hr |
| Mar 2, 10:19 AM CST | River Flood Warning | BMX | 9 days |
| Mar 3, 5:12 AM CST | Tornado Watch | SPC | 5 hr |
| Mar 3, 11:44 AM CST | Areal Flood Advisory | BMX | 3 hr |
| Mar 3, 12:52 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 3, 2:35 PM CST | Flash Flood Watch | BMX | 45 hr |
| Mar 3, 10:19 PM CST | Dense Fog Advisory | BMX | 6 hr |
| Mar 4, 1:19 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 4, 2:39 AM CST | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 4, 9:39 AM CST | River Flood Warning | BMX | 7 days |
| Mar 5, 9:16 AM CST | River Flood Warning | BMX | 34 hr |
| Mar 5, 9:16 AM CST | River Flood Warning | BMX | 51 hr |
| Mar 5, 9:19 AM CST | River Flood Warning | BMX | 31 hr |
| Mar 5, 9:34 PM CST | Dense Fog Advisory | BMX | 8 hr |
| Mar 11, 12:26 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 11, 4:43 PM CDT | Severe Thunderstorm Warning | BMX | 26 min |
| Mar 14, 6:52 AM CDT | Dense Fog Advisory | BMX | 3 hr |
| Mar 24, 8:50 AM CDT | River Flood Warning | BMX | 23 hr |
| Mar 24, 8:52 AM CDT | River Flood Warning | BMX | 4 days |
| Mar 31, 7:47 AM CDT | Special Weather Statement | BMX | 43 min |
| Mar 31, 7:53 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 8:13 AM CDT | Severe Thunderstorm Warning | BMX | 32 min |
| Apr 8, 5:50 AM CDT | Dense Fog Advisory | BMX | 3 hr |
| Apr 8, 12:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 8, 2:40 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 8, 3:38 PM CDT | Severe Thunderstorm Warning | BMX | 52 min |
| Apr 8, 4:33 PM CDT | Severe Thunderstorm Warning | BMX | 42 min |
| Apr 11, 10:53 AM CDT | River Flood Warning | BMX | 6 days |
| Apr 11, 10:55 AM CDT | River Flood Warning | BMX | 16 days |
| Apr 11, 2:04 PM CDT | Wind Advisory | BMX | 42 hr |
| Apr 12, 8:12 AM CDT | River Flood Warning | BMX | 16 days |
| Apr 12, 1:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Apr 12, 3:20 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 12, 4:38 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 12, 7:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 12, 8:49 PM CDT | River Flood Warning | BMX | 5 days |
| Apr 12, 8:58 PM CDT | River Flood Warning | BMX | 52 hr |
| Apr 12, 8:58 PM CDT | River Flood Warning | BMX | 61 hr |
| Apr 12, 9:33 PM CDT | Tornado Warning | BMX | 27 min |
| Apr 18, 3:50 AM CDT | Flash Flood Watch | BMX | 48 hr |
| Apr 18, 9:40 PM CDT | River Flood Warning | BMX | 21 days |
| Apr 18, 9:40 PM CDT | River Flood Warning | BMX | 21 days |
| Apr 19, 3:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Apr 19, 3:56 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 19, 4:22 PM CDT | Special Weather Statement | BMX | 23 min |
| Apr 19, 4:48 PM CDT | Severe Thunderstorm Warning | BMX | 42 min |
| Apr 19, 5:40 PM CDT | Special Weather Statement | BMX | 35 min |
| Apr 19, 5:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 19, 5:55 PM CDT | Tornado Warning | BMX | 23 min |
| Apr 19, 9:19 PM CDT | River Flood Warning | BMX | 3 days |
| Apr 22, 4:48 AM CDT | Flash Flood Watch | BMX | 31 hr |
| Apr 22, 10:23 PM CDT | Wind Advisory | BMX | 14 hr |
| Apr 23, 1:37 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Apr 23, 3:41 PM CDT | Severe Thunderstorm Warning | BMX | 49 min |
| Apr 23, 4:06 PM CDT | Severe Thunderstorm Watch | SPC | 113 min |
| Apr 23, 4:29 PM CDT | Special Weather Statement | BMX | 46 min |
| Apr 23, 4:47 PM CDT | Special Weather Statement | BMX | 43 min |
| May 6, 2:39 AM CDT | Wind Advisory | BMX | 18 hr |
| May 7, 3:12 PM CDT | Wind Advisory | BMX | 26 hr |
| May 17, 6:02 PM CDT | Special Weather Statement | BMX | 28 min |
| May 23, 3:05 AM CDT | Dense Fog Advisory | BMX | 6 hr |
| May 23, 3:40 PM CDT | Special Weather Statement | BMX | 50 min |
| May 23, 4:30 PM CDT | Special Weather Statement | BMX | 45 min |
| May 23, 5:53 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 27, 12:01 PM CDT | Special Weather Statement | BMX | 59 min |
| May 27, 12:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 27, 3:56 PM CDT | Special Weather Statement | BMX | 49 min |
| Jun 5, 7:17 PM CDT | Special Weather Statement | BMX | 43 min |
| Jun 7, 10:43 AM CDT | Wind Advisory | BMX | 32 hr |
| Jun 24, 2:56 PM CDT | Special Weather Statement | BMX | 34 min |
| Jun 25, 6:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 25, 7:32 PM CDT | Severe Thunderstorm Warning | BMX | 39 min |
| Jun 25, 8:12 PM CDT | Special Weather Statement | BMX | 33 min |
| Jun 28, 7:10 PM CDT | Special Weather Statement | BMX | 50 min |
| Jun 28, 7:39 PM CDT | Special Weather Statement | BMX | 36 min |
| Jul 1, 7:48 PM CDT | Special Weather Statement | BMX | 57 min |
| Jul 3, 5:30 PM CDT | Special Weather Statement | BMX | 45 min |
| Jul 3, 6:02 PM CDT | Special Weather Statement | MOB | 43 min |
| Jul 10, 3:11 AM CDT | Heat Advisory | BMX | 16 hr |
| Jul 12, 12:09 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 12, 4:07 PM CDT | Special Weather Statement | BMX | 38 min |
| Jul 13, 3:10 AM CDT | Dense Fog Advisory | BMX | 6 hr |
| Jul 15, 12:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 15, 1:37 PM CDT | Heat Advisory | BMX | 53 hr |
| Aug 11, 5:32 PM CDT | Special Weather Statement | BMX | 43 min |
| Aug 11, 8:13 PM CDT | Special Weather Statement | BMX | 32 min |
| Aug 14, 3:50 PM CDT | Special Weather Statement | BMX | 40 min |
| Aug 21, 5:34 PM CDT | Special Weather Statement | BMX | 26 min |
| Aug 21, 5:50 PM CDT | Severe Thunderstorm Warning | BMX | 40 min |
| Aug 27, 11:38 AM CDT | Special Weather Statement | BMX | 52 min |
| Aug 27, 12:12 PM CDT | Special Weather Statement | BMX | 33 min |
| Aug 28, 10:21 AM CDT | Flash Flood Watch | BMX | 49 min |
| Aug 28, 11:10 AM CDT | Flash Flood Watch | BMX | 7 hr |
| Aug 28, 12:39 PM CDT | Special Weather Statement | BMX | 51 min |
| Sep 14, 4:27 AM CDT | Flash Flood Watch | BMX | 3 days |
| Sep 15, 3:37 PM CDT | Wind Advisory | BMX | 35 hr |
| Sep 28, 2:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 28, 4:14 PM CDT | Special Weather Statement | BMX | 31 min |
| Oct 10, 2:23 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 10, 4:03 AM CDT | Wind Advisory | BMX | 9 hr |
| Oct 27, 4:11 AM CDT | Tropical Storm Watch | BMX | 30 hr |
| Oct 27, 4:30 PM CDT | Flash Flood Watch | BMX | 37 hr |
| Oct 28, 10:06 AM CDT | Tropical Storm Warning | BMX | 21 hr |
| Oct 28, 6:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 2, 1:22 PM CST | Frost Advisory | BMX | 18 hr |
| Nov 12, 10:15 PM CST | Dense Fog Advisory | BMX | 10 hr |
| Nov 17, 4:48 PM CST | Frost Advisory | BMX | 15 hr |
| Nov 25, 11:21 AM CST | Special Weather Statement | BMX | 24 min |
| Dec 11, 2:17 AM CST | Dense Fog Advisory | BMX | 7 hr |
| Dec 12, 6:57 PM CST | Dense Fog Advisory | BMX | 15 hr |
| Dec 13, 9:06 PM CST | Mesoscale Discussion | SPC | 114 min |
| Dec 23, 2:43 PM CST | Wind Advisory | BMX | 27 hr |
| Dec 29, 3:57 AM CST | Dense Fog Advisory | BMX | 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 | 12 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 7 |
| Mesoscale Discussion | 24 |
| Special Weather Statement | 28 |
| Flooding | |
| River Flood Warning | 34 |
| Flash Flood Watch | 10 |
| Areal Flood Advisory | 1 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 9 |
| Fog and smoke | |
| Dense Fog Advisory | 16 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
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.