Alert archive / Mississippi / Alcorn County
Weather alerts in Alcorn County, Mississippi, 2019
119 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Alcorn County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 119
- Warnings
- 23
- Watches
- 17
- Advisories
- 45
- Busiest month
- February18 alerts
- Busiest day
- March 14, 20197 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 3 tornado warnings covering Alcorn County in 2019 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 20 minutes after it went out.
Alcorn County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 2 | 33% | 3 | 100% | 20 min |
| Severe thunderstorm warnings | 11 | 8 | 27% | 4 | 100% | 28 min |
| Flash flood warnings | 3 | 1 | 67% | 1 | 100% | 48 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Memphis, TN: tornado warnings | 43 | 9 | 79% | 33 | 42% | 14 min |
| NWS Memphis, TN: severe thunderstorm warnings | 161 | 76 | 53% | 247 | 71% | 23 min |
| NWS Memphis, TN: flash flood warnings | 47 | 16 | 66% | 50 | 58% | 69 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 5, 2:33 PM CST | Dense Fog Advisory | MEG | 16 hr |
| Jan 17, 9:36 PM CST | Dense Fog Advisory | MEG | 11 hr |
| Jan 18, 1:51 PM CST | Wind Advisory | MEG | 37 hr |
| Jan 20, 3:20 AM CST | Wind Advisory | MEG | 6 hr |
| Jan 27, 2:48 PM CST | Winter Weather Advisory | MEG | 37 hr |
| Feb 5, 5:08 AM CST | Dense Fog Advisory | MEG | 25 hr |
| Feb 18, 2:48 PM CST | Flash Flood Watch | MEG | 37 hr |
| Feb 20, 4:01 AM CST | Areal Flood Advisory | MEG | 119 min |
| Feb 20, 4:06 AM CST | Flash Flood Watch | MEG | 9 hr |
| Feb 20, 4:42 AM CST | Areal Flood Advisory | MEG | 2 hr |
| Feb 20, 7:31 AM CST | Areal Flood Advisory | MEG | 119 min |
| Feb 20, 9:36 AM CST | Areal Flood Advisory | MEG | 114 min |
| Feb 20, 3:34 PM CST | Flash Flood Watch | MEG | 3 days |
| Feb 20, 10:11 PM CST | Dense Fog Advisory | MEG | 11 hr |
| Feb 22, 8:39 AM CST | Flash Flood Warning | MEG | 3 hr |
| Feb 22, 11:43 AM CST | Flash Flood Warning | MEG | 6 hr |
| Feb 22, 5:47 PM CST | Areal Flood Warning | MEG | 12 hr |
| Feb 23, 4:07 AM CST | Flash Flood Warning | MEG | 3 hr |
| Feb 23, 5:36 AM CST | Areal Flood Warning | MEG | 15 hr |
| Feb 23, 6:53 AM CST | Areal Flood Warning | MEG | 15 hr |
| Feb 23, 12:26 PM CST | Tornado Watch | SPC | 8 hr |
| Feb 23, 3:54 PM CST | Severe Thunderstorm Warning | MEG | 36 min |
| Feb 23, 4:20 PM CST | Tornado Warning | MEG | 40 min |
| Mar 9, 10:32 AM CST | Tornado Watch | SPC | 8 hr |
| Mar 9, 1:27 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 9, 1:40 PM CST | Severe Thunderstorm Warning | MEG | 35 min |
| Mar 9, 2:00 PM CST | Severe Thunderstorm Warning | MEG | 45 min |
| Mar 9, 2:25 PM CST | Tornado Warning | MEG | 50 min |
| Mar 12, 3:10 PM CDT | Wind Advisory | MEG | 52 hr |
| Mar 14, 5:28 AM CDT | Tornado Watch | SPC | 7 hr |
| Mar 14, 7:14 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 14, 10:32 AM CDT | Mesoscale Discussion | SPC | 58 min |
| Mar 14, 11:44 AM CDT | Special Weather Statement | MEG | 31 min |
| Mar 14, 11:47 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Mar 14, 12:00 PM CDT | Tornado Warning | MEG | 45 min |
| Mar 14, 12:11 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 30, 3:21 AM CDT | Freeze Watch | MEG | 24 hr |
| Mar 30, 3:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Mar 31, 3:01 AM CDT | Freeze Warning | MEG | 30 hr |
| Apr 5, 4:54 AM CDT | Dense Fog Advisory | MEG | 4 hr |
| Apr 6, 4:29 AM CDT | Dense Fog Advisory | MEG | 4 hr |
| Apr 7, 1:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 11, 3:48 AM CDT | Wind Advisory | MEG | 15 hr |
| Apr 17, 3:39 PM CDT | Flash Flood Watch | MEG | 28 hr |
| May 13, 4:50 AM CDT | Dense Fog Advisory | MEG | 4 hr |
| May 16, 6:03 AM CDT | Dense Fog Advisory | MEG | 2 hr |
| May 20, 5:33 AM CDT | Dense Fog Advisory | MEG | 3 hr |
| Jun 7, 12:05 PM CDT | Flash Flood Watch | MEG | 15 hr |
| Jun 17, 1:57 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 19, 9:58 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 19, 10:24 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 21, 5:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 21, 5:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 21, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 22, 1:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 22, 5:49 PM CDT | Special Weather Statement | MEG | 41 min |
| Jun 22, 5:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 22, 6:17 PM CDT | Severe Thunderstorm Warning | MEG | 43 min |
| Jun 23, 4:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 23, 6:31 PM CDT | Special Weather Statement | MEG | 44 min |
| Jun 23, 11:18 PM CDT | Special Weather Statement | MEG | 42 min |
| Jun 24, 2:10 AM CDT | Special Weather Statement | MEG | 65 min |
| Jun 27, 10:02 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 27, 11:43 AM CDT | Severe Thunderstorm Warning | MEG | 47 min |
| Jun 28, 4:13 AM CDT | Dense Fog Advisory | MEG | 5 hr |
| Jul 3, 1:40 PM CDT | Special Weather Statement | MEG | 35 min |
| Jul 8, 2:43 PM CDT | Heat Advisory | MEG | 29 hr |
| Jul 9, 5:05 PM CDT | Heat Advisory | MEG | 26 hr |
| Jul 10, 3:24 PM CDT | Heat Advisory | MEG | 29 hr |
| Jul 11, 8:35 AM CDT | Areal Flood Advisory | MEG | 115 min |
| Jul 13, 3:39 AM CDT | Flash Flood Watch | MEG | 4 days |
| Jul 14, 1:16 PM CDT | Special Weather Statement | MEG | 29 min |
| Jul 16, 1:34 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 3:38 AM CDT | Areal Flood Advisory | MEG | 112 min |
| Jul 17, 3:09 PM CDT | Heat Advisory | MEG | 53 hr |
| Jul 21, 7:35 AM CDT | Areal Flood Advisory | MEG | 3 hr |
| Jul 22, 2:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 2:47 AM CDT | Dense Fog Advisory | MEG | 6 hr |
| Aug 7, 12:33 AM CDT | Special Weather Statement | MEG | 42 min |
| Aug 7, 12:40 AM CDT | Severe Thunderstorm Warning | MEG | 50 min |
| Aug 7, 5:16 AM CDT | Areal Flood Advisory | MEG | 3 hr |
| Aug 7, 5:28 PM CDT | Special Weather Statement | MEG | 47 min |
| Aug 7, 5:37 PM CDT | Areal Flood Advisory | MEG | 113 min |
| Aug 8, 2:06 AM CDT | Dense Fog Advisory | MEG | 7 hr |
| Aug 10, 3:54 AM CDT | Heat Advisory | MEG | 60 hr |
| Aug 10, 11:09 PM CDT | Dense Fog Advisory | MEG | 10 hr |
| Aug 11, 3:21 AM CDT | Excessive Heat Watch | MEG | 37 hr |
| Aug 11, 3:21 AM CDT | Excessive Heat Warning | MEG | 65 hr |
| Aug 13, 6:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Aug 13, 9:11 PM CDT | Special Weather Statement | MEG | 49 min |
| Aug 13, 10:02 PM CDT | Special Weather Statement | MEG | 43 min |
| Aug 13, 10:31 PM CDT | Areal Flood Advisory | MEG | 119 min |
| Aug 19, 3:59 AM CDT | Heat Advisory | MEG | 64 hr |
| Aug 23, 4:30 PM CDT | Areal Flood Advisory | MEG | 83 min |
| Aug 25, 6:06 PM CDT | Areal Flood Advisory | MEG | 3 hr |
| Sep 26, 2:46 AM CDT | Dense Fog Advisory | MEG | 3 hr |
| Oct 7, 12:38 AM CDT | Special Weather Statement | MEG | 52 min |
| Oct 9, 1:01 AM CDT | Dense Fog Advisory | MEG | 10 hr |
| Oct 14, 5:47 AM CDT | Dense Fog Advisory | MEG | 4 hr |
| Oct 19, 11:55 PM CDT | Dense Fog Advisory | MEG | 9 hr |
| Oct 25, 3:44 AM CDT | Flash Flood Watch | MEG | 34 hr |
| Oct 26, 6:03 AM CDT | Wind Advisory | MEG | 9 hr |
| Oct 26, 11:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Oct 26, 11:45 AM CDT | Severe Thunderstorm Warning | MEG | 45 min |
| Oct 26, 12:28 PM CDT | Severe Thunderstorm Warning | MEG | 47 min |
| Oct 26, 12:34 PM CDT | Severe Thunderstorm Warning | MEG | 26 min |
| Oct 26, 12:55 PM CDT | Severe Thunderstorm Warning | MEG | 50 min |
| Oct 26, 12:58 PM CDT | Severe Thunderstorm Warning | MEG | 47 min |
| Oct 30, 3:07 PM CDT | Freeze Watch | MEG | 12 hr |
| Oct 31, 3:19 AM CDT | Freeze Warning | MEG | 30 hr |
| Nov 11, 4:25 AM CST | Wind Advisory | MEG | 22 hr |
| Nov 11, 6:06 PM CST | Winter Weather Advisory | MEG | 9 hr |
| Nov 30, 2:31 PM CST | Mesoscale Discussion | SPC | 59 min |
| Nov 30, 4:53 PM CST | Special Weather Statement | MEG | 52 min |
| Dec 7, 9:15 PM CST | Dense Fog Advisory | MEG | 12 hr |
| Dec 13, 8:13 PM CST | Dense Fog Advisory | MEG | 14 hr |
| Dec 16, 1:52 PM CST | Mesoscale Discussion | SPC | 83 min |
| Dec 16, 2:22 PM CST | Tornado Watch | SPC | 8 hr |
| Dec 16, 3:10 PM CST | Mesoscale Discussion | SPC | 65 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 | 11 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 21 |
| Special Weather Statement | 13 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 7 |
| Areal Flood Advisory | 12 |
| Winter | |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 2 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 19 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.