Alert archive / Mississippi / Montgomery County
Weather alerts in Montgomery County, Mississippi, 2020
80 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Montgomery County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 80
- Warnings
- 19
- Watches
- 17
- Advisories
- 12
- Busiest month
- April15 alerts
- Busiest day
- June 5, 20205 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Montgomery County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 12 | 20% | 10 | 100% | 26 min |
| Flash flood warnings | 3 | 2 | 33% | 3 | 100% | 91 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 60 | 37 | 38% | 149 | 85% | 26 min |
| NWS Jackson, MS: severe thunderstorm warnings | 423 | 268 | 37% | 898 | 83% | 26 min |
| NWS Jackson, MS: flash flood warnings | 108 | 73 | 32% | 276 | 85% | 87 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, 3:07 AM CST | Flash Flood Watch | JAN | 57 hr |
| Jan 9, 2:27 PM CST | Wind Advisory | JAN | 48 hr |
| Jan 11, 2:37 AM CST | Tornado Watch | SPC | 8 hr |
| Jan 11, 5:14 AM CST | Severe Thunderstorm Warning | JAN | 48 min |
| Jan 11, 7:18 AM CST | Severe Thunderstorm Warning | JAN | 57 min |
| Jan 13, 8:05 AM CST | Dense Fog Advisory | JAN | 3 hr |
| Jan 14, 3:00 AM CST | Flash Flood Watch | JAN | 21 hr |
| Feb 5, 11:49 AM CST | Tornado Watch | SPC | 6 hr |
| Feb 5, 3:41 PM CST | Mesoscale Discussion | SPC | 64 min |
| Feb 9, 4:42 AM CST | Flash Flood Watch | JAN | 47 hr |
| Feb 10, 1:37 AM CST | Severe Thunderstorm Warning | JAN | 53 min |
| Feb 10, 9:43 AM CST | Flash Flood Warning | JAN | 8 hr |
| Feb 10, 11:13 PM CST | Flash Flood Warning | JAN | 5 hr |
| Feb 11, 3:34 AM CST | Flash Flood Watch | JAN | 49 hr |
| Feb 12, 1:46 PM CST | Mesoscale Discussion | SPC | 119 min |
| Feb 17, 2:14 PM CST | Flash Flood Watch | JAN | 31 hr |
| Feb 18, 2:34 PM CST | Flash Flood Warning | JAN | 3 hr |
| Mar 3, 2:52 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 11, 12:26 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 11, 2:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Mar 22, 11:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 23, 2:10 AM CDT | Severe Thunderstorm Warning | JAN | 50 min |
| Mar 28, 8:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Mar 28, 9:58 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 28, 11:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 8, 12:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 11, 3:44 PM CDT | Wind Advisory | JAN | 30 hr |
| Apr 12, 10:24 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 12, 10:41 AM CDT | Tornado Watch | SPC | 10 hr |
| Apr 12, 5:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 12, 6:39 PM CDT | Severe Thunderstorm Warning | JAN | 51 min |
| Apr 12, 9:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 12, 10:05 PM CDT | Severe Thunderstorm Warning | JAN | 55 min |
| Apr 17, 11:22 PM CDT | Special Weather Statement | JAN | 23 min |
| Apr 18, 4:31 AM CDT | Flash Flood Watch | JAN | 41 hr |
| Apr 19, 2:34 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 21, 2:16 PM CDT | Flash Flood Watch | JAN | 44 hr |
| Apr 22, 8:58 PM CDT | Wind Advisory | JAN | 8 hr |
| Apr 29, 2:06 AM CDT | Special Weather Statement | JAN | 54 min |
| Apr 29, 3:25 PM CDT | Special Weather Statement | JAN | 65 min |
| May 7, 3:58 PM CDT | Wind Advisory | JAN | 27 hr |
| May 8, 9:03 AM CDT | Special Weather Statement | JAN | 87 min |
| May 8, 10:51 AM CDT | Special Weather Statement | JAN | 54 min |
| May 17, 12:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 4:09 PM CDT | Severe Thunderstorm Warning | JAN | 67 min |
| May 27, 5:55 PM CDT | Severe Thunderstorm Warning | JAN | 26 min |
| May 27, 6:22 PM CDT | Special Weather Statement | JAN | 38 min |
| May 28, 12:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 3, 6:03 PM CDT | Severe Thunderstorm Warning | JAN | 57 min |
| Jun 5, 2:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 5, 2:49 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 5, 3:23 PM CDT | Severe Thunderstorm Warning | JAN | 67 min |
| Jun 5, 3:42 PM CDT | Severe Thunderstorm Warning | JAN | 93 min |
| Jun 5, 4:21 PM CDT | Severe Thunderstorm Warning | JAN | 69 min |
| Jun 6, 4:24 PM CDT | Flash Flood Watch | JAN | 57 hr |
| Jun 7, 11:26 AM CDT | Wind Advisory | JAN | 22 hr |
| Jun 8, 1:09 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 10, 3:03 AM CDT | Special Weather Statement | JAN | 27 min |
| Jun 23, 12:01 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 4:27 PM CDT | Special Weather Statement | JAN | 48 min |
| Jul 3, 9:29 PM CDT | Special Weather Statement | JAN | 31 min |
| Jul 12, 7:02 AM CDT | Special Weather Statement | JAN | 43 min |
| Jul 14, 2:22 PM CDT | Heat Advisory | JAN | 29 hr |
| Jul 15, 7:16 PM CDT | Heat Advisory | JAN | 24 hr |
| Jul 21, 3:10 PM CDT | Severe Thunderstorm Warning | JAN | 32 min |
| Jul 31, 12:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 31, 1:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 3:42 PM CDT | Severe Thunderstorm Warning | JAN | 63 min |
| Jul 31, 4:36 PM CDT | Severe Thunderstorm Warning | JAN | 39 min |
| Aug 16, 3:07 PM CDT | Special Weather Statement | JAN | 38 min |
| Aug 27, 2:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Aug 27, 3:47 PM CDT | Tornado Watch | SPC | 8 hr |
| Aug 28, 3:16 PM CDT | Heat Advisory | JAN | 28 hr |
| Aug 30, 1:39 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 23, 3:56 AM CDT | Flash Flood Watch | JAN | 30 hr |
| Sep 27, 4:02 AM CDT | Dense Fog Advisory | JAN | 6 hr |
| Oct 9, 4:20 AM CDT | Wind Advisory | JAN | 33 hr |
| Nov 25, 5:45 AM CST | Special Weather Statement | JAN | 45 min |
| Nov 30, 2:07 PM CST | Freeze Warning | JAN | 19 hr |
| Dec 20, 7:57 PM CST | Dense Fog Advisory | JAN | 13 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 | 15 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 20 |
| Special Weather Statement | 12 |
| Flooding | |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 9 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
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.