Alert archive / Mississippi / Copiah County
Weather alerts in Copiah County, Mississippi, 2020
148 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Copiah County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 148
- Warnings
- 44
- Watches
- 21
- Advisories
- 22
- Busiest month
- April23 alerts
- Busiest day
- February 5, 202010 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
3 of 6 tornado warnings covering Copiah County in 2020 had a tornado report inside them.
Copiah County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 6 | 3 | 50% | 0 | ||
| Severe thunderstorm warnings | 26 | 17 | 35% | 29 | 93% | 29 min |
| Flash flood warnings | 7 | 6 | 14% | 1 | 100% | 45 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 1, 10:01 AM CST | River Flood Warning | JAN | 27 days |
| Jan 2, 2:15 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Jan 9, 2:27 PM CST | Wind Advisory | JAN | 48 hr |
| Jan 11, 2:22 AM CST | Mesoscale Discussion | SPC | 53 min |
| Jan 11, 2:37 AM CST | Tornado Watch | SPC | 8 hr |
| Jan 11, 4:31 AM CST | Mesoscale Discussion | SPC | 59 min |
| Jan 11, 6:13 AM CST | Severe Thunderstorm Warning | JAN | 62 min |
| Jan 11, 6:26 AM CST | Severe Thunderstorm Warning | JAN | 64 min |
| Jan 11, 7:30 AM CST | Severe Thunderstorm Warning | JAN | 75 min |
| Jan 11, 7:39 AM CST | Mesoscale Discussion | SPC | 96 min |
| Jan 11, 8:08 AM CST | Tornado Warning | JAN | 50 min |
| Jan 13, 2:36 PM CST | Dense Fog Advisory | JAN | 18 hr |
| Jan 14, 12:25 PM CST | Flash Flood Warning | JAN | 3 hr |
| Jan 14, 4:15 PM CST | Flash Flood Warning | JAN | 3 hr |
| Jan 18, 12:43 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 28, 12:33 AM CST | Dense Fog Advisory | JAN | 10 hr |
| Jan 30, 4:11 AM CST | Dense Fog Advisory | JAN | 5 hr |
| Feb 5, 10:28 AM CST | Mesoscale Discussion | SPC | 92 min |
| Feb 5, 11:49 AM CST | Tornado Watch | SPC | 6 hr |
| Feb 5, 1:39 PM CST | Mesoscale Discussion | SPC | 96 min |
| Feb 5, 1:53 PM CST | Special Weather Statement | JAN | 37 min |
| Feb 5, 1:55 PM CST | Severe Thunderstorm Warning | JAN | 50 min |
| Feb 5, 2:07 PM CST | Tornado Warning | JAN | 53 min |
| Feb 5, 3:05 PM CST | Severe Thunderstorm Warning | JAN | 41 min |
| Feb 5, 3:10 PM CST | Tornado Warning | JAN | 22 min |
| Feb 5, 3:41 PM CST | Mesoscale Discussion | SPC | 64 min |
| Feb 5, 5:06 PM CST | Mesoscale Discussion | SPC | 84 min |
| Feb 5, 9:43 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 6, 1:28 AM CST | Special Weather Statement | JAN | 47 min |
| Feb 9, 4:42 AM CST | Flash Flood Watch | JAN | 47 hr |
| Feb 9, 8:44 AM CST | River Flood Warning | JAN | 21 days |
| Feb 10, 12:39 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 10, 4:33 PM CST | Mesoscale Discussion | SPC | 87 min |
| Feb 17, 2:14 PM CST | Flash Flood Watch | JAN | 31 hr |
| Feb 19, 2:59 PM CST | Flash Flood Watch | JAN | 18 hr |
| Feb 25, 5:04 AM CST | Dense Fog Advisory | JAN | 4 hr |
| Mar 3, 11:44 AM CST | River Flood Warning | JAN | 13 days |
| Mar 3, 2:38 PM CST | Flash Flood Watch | JAN | 39 hr |
| Mar 4, 1:19 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 4, 1:53 AM CST | Tornado Watch | SPC | 8 hr |
| Mar 4, 3:44 AM CST | Severe Thunderstorm Warning | JAN | 48 min |
| Mar 4, 4:36 AM CST | Special Weather Statement | JAN | 24 min |
| Mar 4, 10:50 AM CST | Mesoscale Discussion | SPC | 115 min |
| Mar 4, 1:25 PM CST | Special Weather Statement | JAN | 65 min |
| Mar 31, 3:16 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Mar 31, 5:35 AM CDT | Special Weather Statement | JAN | 25 min |
| Mar 31, 5:41 AM CDT | Severe Thunderstorm Warning | JAN | 64 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, 3:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 12, 11:06 PM CDT | Special Weather Statement | JAN | 39 min |
| Apr 18, 4:31 AM CDT | Flash Flood Watch | JAN | 41 hr |
| Apr 18, 11:30 AM CDT | River Flood Warning | JAN | 13 days |
| Apr 19, 11:06 AM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 19, 11:45 AM CDT | Tornado Watch | SPC | 9 hr |
| Apr 19, 12:53 PM CDT | Severe Thunderstorm Warning | JAN | 43 min |
| Apr 19, 3:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Apr 19, 3:11 PM CDT | Severe Thunderstorm Warning | JAN | 43 min |
| Apr 21, 2:16 PM CDT | Flash Flood Watch | JAN | 44 hr |
| Apr 22, 6:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Apr 22, 9:02 PM CDT | Severe Thunderstorm Warning | JAN | 42 min |
| Apr 22, 9:47 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 22, 9:58 PM CDT | Severe Thunderstorm Warning | JAN | 47 min |
| Apr 23, 1:33 AM CDT | Severe Thunderstorm Warning | JAN | 57 min |
| Apr 23, 2:21 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Apr 23, 2:28 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 25, 12:27 AM CDT | Special Weather Statement | JAN | 33 min |
| Apr 29, 3:22 AM CDT | Special Weather Statement | JAN | 23 min |
| May 8, 9:04 AM CDT | Severe Thunderstorm Warning | JAN | 47 min |
| May 8, 11:51 AM CDT | Special Weather Statement | JAN | 54 min |
| May 17, 12:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 17, 2:00 PM CDT | Special Weather Statement | JAN | 30 min |
| May 22, 5:53 PM CDT | Severe Thunderstorm Warning | JAN | 37 min |
| May 23, 11:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| May 23, 1:08 PM CDT | Special Weather Statement | JAN | 37 min |
| May 23, 1:39 PM CDT | Severe Thunderstorm Warning | JAN | 51 min |
| May 25, 1:13 PM CDT | Special Weather Statement | JAN | 32 min |
| May 26, 2:28 PM CDT | Special Weather Statement | JAN | 47 min |
| May 27, 1:22 AM CDT | Special Weather Statement | JAN | 23 min |
| May 27, 12:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 27, 1:47 PM CDT | Special Weather Statement | JAN | 28 min |
| May 27, 2:09 PM CDT | Severe Thunderstorm Warning | JAN | 51 min |
| May 27, 2:32 PM CDT | Severe Thunderstorm Warning | JAN | 58 min |
| May 27, 2:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 3, 2:21 PM CDT | Severe Thunderstorm Warning | JAN | 39 min |
| Jun 5, 2:49 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 5, 5:25 PM CDT | Severe Thunderstorm Warning | JAN | 65 min |
| Jun 5, 6:41 PM CDT | Severe Thunderstorm Warning | JAN | 79 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, 2:44 PM CDT | Special Weather Statement | JAN | 61 min |
| Jun 23, 6:07 PM CDT | Special Weather Statement | JAN | 53 min |
| Jun 23, 6:49 PM CDT | Special Weather Statement | JAN | 41 min |
| Jun 25, 3:43 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 25, 4:21 PM CDT | Severe Thunderstorm Warning | JAN | 69 min |
| Jun 29, 6:46 PM CDT | Special Weather Statement | JAN | 44 min |
| Jul 2, 2:09 PM CDT | Special Weather Statement | JAN | 51 min |
| Jul 7, 4:55 AM CDT | Dense Fog Advisory | JAN | 3 hr |
| Jul 10, 2:38 AM CDT | Heat Advisory | JAN | 16 hr |
| Jul 10, 3:19 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 11, 2:32 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 12, 2:51 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 13, 2:58 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 14, 2:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 14, 2:22 PM CDT | Heat Advisory | JAN | 29 hr |
| Jul 15, 7:16 PM CDT | Heat Advisory | JAN | 24 hr |
| Jul 31, 1:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 6:10 PM CDT | Special Weather Statement | JAN | 35 min |
| Aug 16, 3:18 AM CDT | Heat Advisory | JAN | 15 hr |
| Aug 16, 5:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 16, 7:31 PM CDT | Special Weather Statement | JAN | 29 min |
| Aug 20, 3:11 PM CDT | Special Weather Statement | JAN | 34 min |
| Aug 20, 3:44 PM CDT | Special Weather Statement | JAN | 31 min |
| Aug 20, 4:22 PM CDT | Special Weather Statement | JAN | 23 min |
| Aug 26, 4:13 PM CDT | Special Weather Statement | JAN | 32 min |
| Aug 27, 6:36 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 27, 7:47 AM CDT | Tornado Watch | SPC | 8 hr |
| Aug 27, 11:10 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 3:16 PM CDT | Heat Advisory | JAN | 28 hr |
| Sep 1, 2:49 AM CDT | Heat Advisory | JAN | 16 hr |
| Sep 13, 2:32 AM CDT | Flash Flood Watch | JAN | 66 hr |
| Sep 23, 3:56 AM CDT | Flash Flood Watch | JAN | 30 hr |
| Sep 23, 2:37 PM CDT | Tornado Watch | SPC | 7 hr |
| Sep 23, 7:37 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Sep 23, 8:10 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Sep 23, 10:04 PM CDT | Tornado Warning | JAN | 29 min |
| Sep 23, 10:22 PM CDT | Flash Flood Warning | JAN | 5 hr |
| Sep 23, 11:26 PM CDT | Flash Flood Warning | JAN | 4 hr |
| Sep 27, 4:02 AM CDT | Dense Fog Advisory | JAN | 6 hr |
| Oct 7, 4:01 PM CDT | Flash Flood Watch | JAN | 63 hr |
| Oct 9, 4:20 AM CDT | Wind Advisory | JAN | 33 hr |
| Nov 25, 6:20 AM CST | Severe Thunderstorm Warning | JAN | 40 min |
| Nov 25, 7:12 AM CST | Special Weather Statement | JAN | 48 min |
| Nov 30, 2:07 PM CST | Freeze Warning | JAN | 19 hr |
| Dec 12, 8:58 PM CST | Dense Fog Advisory | JAN | 12 hr |
| Dec 13, 7:34 PM CST | Severe Thunderstorm Warning | JAN | 41 min |
| Dec 13, 7:54 PM CST | Special Weather Statement | JAN | 51 min |
| Dec 13, 8:10 PM CST | Severe Thunderstorm Warning | JAN | 65 min |
| Dec 13, 8:28 PM CST | Severe Thunderstorm Warning | JAN | 47 min |
| Dec 20, 7:57 PM CST | Dense Fog Advisory | JAN | 13 hr |
| Dec 23, 10:37 PM CST | Severe Thunderstorm Warning | JAN | 53 min |
| Dec 23, 10:51 PM CST | Mesoscale Discussion | SPC | 114 min |
| Dec 23, 11:07 PM CST | Tornado Warning | JAN | 53 min |
| Dec 23, 11:51 PM CST | Tornado Warning | JAN | 39 min |
| Dec 31, 3:30 PM CST | Mesoscale Discussion | SPC | 2 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 | 26 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 33 |
| Special Weather Statement | 28 |
| Flooding | |
| Flash Flood Warning | 7 |
| River Flood Warning | 4 |
| Flash Flood Watch | 11 |
| Heat | |
| Heat Advisory | 10 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
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.