Alert archive / Mississippi / Clay County
Weather alerts in Clay County, Mississippi, 2011
207 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clay County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 207
- Warnings
- 73
- Watches
- 37
- Advisories
- 19
- Busiest month
- April75 alerts
- Busiest day
- April 27, 201121 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 12 tornado warnings covering Clay County in 2011 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 18 minutes after it went out.
Clay County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 12 | 3 | 75% | 3 | 100% | 18 min |
| Severe thunderstorm warnings | 31 | 13 | 58% | 13 | 62% | 17 min |
| Flash flood warnings | 12 | 9 | 25% | 1 | 100% | 60 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 225 | 65 | 71% | 184 | 85% | 26 min |
| NWS Jackson, MS: severe thunderstorm warnings | 717 | 416 | 42% | 1,089 | 75% | 24 min |
| NWS Jackson, MS: flash flood warnings | 164 | 99 | 40% | 205 | 93% | 110 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 |
|---|---|---|---|
| Dec 31, 9:26 PM CST | Flash Flood Watch | JAN | 7 hr |
| Dec 31, 10:46 PM CST | Tornado Watch | SPC | 5 hr |
| Jan 1, 12:21 AM CST | Tornado Warning | JAN | 54 min |
| Jan 1, 1:05 AM CST | Tornado Warning | JAN | 55 min |
| Jan 1, 9:41 AM CST | River Flood Warning | JAN | 23 hr |
| Jan 5, 10:53 PM CST | Dense Fog Advisory | JAN | 11 hr |
| Jan 7, 3:30 PM CST | Winter Storm Watch | JAN | 45 hr |
| Jan 8, 3:01 PM CST | Winter Storm Warning | JAN | 37 hr |
| Jan 9, 12:45 PM CST | Winter Weather Advisory | JAN | 23 hr |
| Jan 11, 4:36 AM CST | Hard Freeze Warning | JAN | 3 days |
| Jan 11, 4:47 AM CST | Wind Chill Advisory | JAN | 28 hr |
| Jan 31, 2:38 PM CST | Wind Advisory | JAN | 29 hr |
| Feb 2, 3:54 PM CST | Winter Storm Watch | JAN | 25 hr |
| Feb 3, 4:39 AM CST | Winter Storm Warning | JAN | 31 hr |
| Feb 4, 5:28 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 7, 3:21 PM CST | Winter Storm Watch | JAN | 38 hr |
| Feb 8, 3:35 PM CST | Winter Storm Warning | JAN | 32 hr |
| Feb 9, 5:28 AM CST | Winter Weather Advisory | JAN | 22 hr |
| Feb 9, 2:17 PM CST | Hard Freeze Warning | JAN | 45 hr |
| Feb 9, 3:03 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 24, 5:26 PM CST | Mesoscale Discussion | SPC | 94 min |
| Feb 24, 8:11 PM CST | Mesoscale Discussion | SPC | 64 min |
| Feb 24, 8:30 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 24, 8:54 PM CST | Severe Thunderstorm Warning | JAN | 66 min |
| Feb 24, 9:45 PM CST | Severe Thunderstorm Warning | JAN | 75 min |
| Feb 24, 10:38 PM CST | Mesoscale Discussion | SPC | 97 min |
| Feb 28, 5:28 AM CST | Mesoscale Discussion | SPC | 62 min |
| Feb 28, 5:47 AM CST | Mesoscale Discussion | SPC | 28 min |
| Feb 28, 5:59 AM CST | Tornado Watch | SPC | 7 hr |
| Feb 28, 11:25 AM CST | Mesoscale Discussion | SPC | 95 min |
| Mar 7, 6:02 PM CST | Flash Flood Watch | JAN | 41 hr |
| Mar 8, 8:12 AM CST | River Flood Warning | JAN | 3 days |
| Mar 14, 12:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Mar 26, 10:21 AM CDT | Mesoscale Discussion | SPC | 54 min |
| Mar 26, 11:25 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Mar 26, 2:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Mar 26, 3:27 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 26, 8:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Mar 26, 9:33 PM CDT | Mesoscale Discussion | SPC | 27 min |
| Mar 26, 10:58 PM CDT | Severe Thunderstorm Warning | JAN | 26 min |
| Mar 29, 6:26 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Mar 29, 7:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Mar 29, 11:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 4, 12:05 AM CDT | Wind Advisory | JAN | 22 hr |
| Apr 4, 10:04 AM CDT | River Flood Warning | JAN | 11 hr |
| Apr 4, 10:25 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 4, 10:53 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 4, 3:34 PM CDT | Severe Thunderstorm Warning | JAN | 56 min |
| Apr 4, 4:40 PM CDT | Flash Flood Warning | JAN | 2 hr |
| Apr 11, 8:58 AM CDT | Mesoscale Discussion | SPC | 62 min |
| Apr 11, 9:46 AM CDT | Mesoscale Discussion | SPC | 29 min |
| Apr 11, 10:41 AM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 11, 12:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Apr 11, 3:56 PM CDT | Mesoscale Discussion | SPC | 34 min |
| Apr 15, 4:21 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 15, 7:31 AM CDT | Severe Thunderstorm Warning | JAN | 44 min |
| Apr 15, 7:32 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 15, 8:15 AM CDT | Severe Thunderstorm Warning | JAN | 60 min |
| Apr 15, 8:54 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Apr 15, 10:01 AM CDT | Flash Flood Warning | JAN | 5 hr |
| Apr 15, 11:42 AM CDT | Tornado Warning | JAN | 47 min |
| Apr 15, 11:55 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Apr 15, 12:56 PM CDT | Tornado Warning | JAN | 43 min |
| Apr 15, 1:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 15, 2:41 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 15, 3:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 15, 3:46 PM CDT | Tornado Warning | JAN | 59 min |
| Apr 15, 3:54 PM CDT | River Flood Warning | JAN | 68 hr |
| Apr 15, 4:44 PM CDT | Tornado Warning | JAN | 43 min |
| Apr 19, 9:35 AM CDT | River Flood Warning | JAN | 24 hr |
| Apr 19, 10:14 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 19, 11:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 20, 3:37 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 20, 4:10 AM CDT | Special Weather Statement | JAN | 30 min |
| Apr 20, 4:22 AM CDT | Severe Thunderstorm Warning | JAN | 68 min |
| Apr 20, 9:22 AM CDT | Flash Flood Watch | JAN | 31 hr |
| Apr 20, 12:19 PM CDT | Special Weather Statement | JAN | 31 min |
| Apr 20, 12:28 PM CDT | Severe Thunderstorm Warning | JAN | 35 min |
| Apr 20, 1:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 20, 1:48 PM CDT | Severe Thunderstorm Warning | JAN | 42 min |
| Apr 20, 2:22 PM CDT | Severe Thunderstorm Warning | JAN | 38 min |
| Apr 20, 3:38 PM CDT | Severe Thunderstorm Warning | JAN | 37 min |
| Apr 20, 4:21 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Apr 20, 5:12 PM CDT | Tornado Warning | JAN | 63 min |
| Apr 20, 5:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 20, 5:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 20, 6:12 PM CDT | Tornado Warning | JAN | 63 min |
| Apr 20, 6:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 20, 7:11 PM CDT | Severe Thunderstorm Warning | JAN | 49 min |
| Apr 20, 7:45 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 20, 8:33 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Apr 20, 8:48 PM CDT | Severe Thunderstorm Warning | JAN | 57 min |
| Apr 23, 1:29 PM CDT | River Flood Warning | JAN | 19 hr |
| Apr 25, 11:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 26, 7:36 AM CDT | Flash Flood Watch | JAN | 32 hr |
| Apr 26, 8:27 AM CDT | Special Weather Statement | JAN | 73 min |
| Apr 26, 1:48 PM CDT | Wind Advisory | JAN | 29 hr |
| Apr 26, 7:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 26, 9:03 PM CDT | River Flood Warning | JAN | 37 hr |
| Apr 26, 9:33 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 26, 11:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Apr 27, 2:26 AM CDT | Tornado Watch | SPC | 6 hr |
| Apr 27, 2:38 AM CDT | Tornado Warning | JAN | 40 min |
| Apr 27, 3:11 AM CDT | Tornado Warning | JAN | 49 min |
| Apr 27, 3:17 AM CDT | Severe Thunderstorm Warning | JAN | 17 min |
| Apr 27, 6:25 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Apr 27, 7:06 AM CDT | Special Weather Statement | JAN | 29 min |
| Apr 27, 7:23 AM CDT | Severe Thunderstorm Warning | JAN | 9 min |
| Apr 27, 8:08 AM CDT | Tornado Watch | SPC | 6 hr |
| Apr 27, 10:45 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Apr 27, 11:02 AM CDT | Tornado Watch | SPC | 8 hr |
| Apr 27, 2:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 27, 3:44 PM CDT | Tornado Warning | JAN | 44 min |
| Apr 27, 4:39 PM CDT | Severe Thunderstorm Warning | JAN | 23 min |
| Apr 27, 4:55 PM CDT | Tornado Warning | JAN | 45 min |
| Apr 27, 5:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 27, 5:44 PM CDT | Severe Thunderstorm Warning | JAN | 41 min |
| Apr 27, 6:27 PM CDT | Mesoscale Discussion | SPC | 33 min |
| May 2, 1:51 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 13, 12:31 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 13, 5:54 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 13, 7:44 PM CDT | Flash Flood Warning | JAN | 96 min |
| May 13, 7:58 PM CDT | Mesoscale Discussion | SPC | 62 min |
| May 25, 9:43 PM CDT | Tornado Watch | SPC | 5 hr |
| May 25, 10:09 PM CDT | Severe Thunderstorm Warning | JAN | 66 min |
| May 25, 10:27 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 11:26 PM CDT | Special Weather Statement | JAN | 59 min |
| Jun 2, 2:48 PM CDT | Heat Advisory | JAN | 3 days |
| Jun 3, 5:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 5, 2:37 PM CDT | Severe Thunderstorm Warning | JAN | 38 min |
| Jun 13, 1:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 13, 2:45 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 15, 10:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 2:05 PM CDT | Special Weather Statement | JAN | 30 min |
| Jun 16, 2:13 PM CDT | Severe Thunderstorm Warning | JAN | 47 min |
| Jun 16, 2:59 PM CDT | Severe Thunderstorm Warning | JAN | 46 min |
| Jun 16, 3:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 16, 3:20 PM CDT | Flash Flood Warning | JAN | 115 min |
| Jun 16, 3:39 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 17, 8:56 AM CDT | Special Weather Statement | JAN | 39 min |
| Jun 17, 9:53 AM CDT | Special Weather Statement | JAN | 27 min |
| Jun 21, 11:58 AM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 21, 1:06 PM CDT | Severe Thunderstorm Warning | JAN | 54 min |
| Jun 21, 1:50 PM CDT | Severe Thunderstorm Warning | JAN | 25 min |
| Jun 22, 11:57 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 1:04 PM CDT | Special Weather Statement | JAN | 46 min |
| Jun 24, 12:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 1:49 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 3:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 28, 9:52 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 28, 10:26 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 28, 10:55 AM CDT | Special Weather Statement | JAN | 40 min |
| Jul 4, 1:56 PM CDT | Severe Thunderstorm Warning | JAN | 64 min |
| Jul 7, 11:46 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 9, 4:39 AM CDT | Heat Advisory | JAN | 6 days |
| Jul 9, 5:26 PM CDT | Special Weather Statement | JAN | 89 min |
| Jul 10, 5:26 PM CDT | Special Weather Statement | JAN | 74 min |
| Jul 11, 2:26 PM CDT | Excessive Heat Warning | JAN | 29 hr |
| Jul 13, 6:36 AM CDT | Special Weather Statement | JAN | 44 min |
| Jul 13, 3:52 PM CDT | Severe Thunderstorm Warning | JAN | 50 min |
| Jul 13, 4:30 PM CDT | Severe Thunderstorm Warning | JAN | 30 min |
| Jul 24, 2:01 PM CDT | Special Weather Statement | JAN | 29 min |
| Jul 25, 5:33 AM CDT | Flash Flood Watch | JAN | 12 hr |
| Jul 25, 7:06 AM CDT | Flash Flood Warning | JAN | 114 min |
| Jul 25, 8:55 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Jul 27, 5:50 PM CDT | Special Weather Statement | JAN | 75 min |
| Jul 31, 4:00 AM CDT | Heat Advisory | JAN | 72 hr |
| Aug 1, 3:53 AM CDT | Excessive Heat Warning | JAN | 5 days |
| Aug 3, 2:49 PM CDT | Heat Advisory | JAN | 8 days |
| Aug 4, 3:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Aug 4, 3:41 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 4, 4:27 PM CDT | Severe Thunderstorm Warning | JAN | 63 min |
| Aug 4, 6:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Aug 4, 6:39 PM CDT | Severe Thunderstorm Warning | JAN | 51 min |
| Aug 5, 12:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Aug 5, 4:04 PM CDT | Special Weather Statement | JAN | 31 min |
| Aug 8, 5:53 AM CDT | Special Weather Statement | JAN | 32 min |
| Aug 8, 5:51 PM CDT | Severe Thunderstorm Warning | JAN | 39 min |
| Aug 10, 3:18 PM CDT | Special Weather Statement | JAN | 32 min |
| Aug 10, 3:30 PM CDT | Severe Thunderstorm Warning | JAN | 60 min |
| Aug 10, 3:49 PM CDT | Special Weather Statement | MEG | 26 min |
| Aug 10, 5:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 18, 4:24 PM CDT | Heat Advisory | JAN | 3 days |
| Aug 20, 2:41 PM CDT | Special Weather Statement | JAN | 59 min |
| Aug 24, 3:13 PM CDT | Severe Thunderstorm Warning | JAN | 42 min |
| Sep 2, 3:11 PM CDT | Flash Flood Watch | JAN | 3 days |
| Sep 3, 1:58 PM CDT | River Flood Warning | JAN | 3 days |
| Sep 3, 3:57 PM CDT | Wind Advisory | JAN | 52 hr |
| Sep 5, 6:29 AM CDT | Flash Flood Warning | JAN | 2 hr |
| Sep 5, 8:31 AM CDT | Flash Flood Warning | JAN | 4 hr |
| Sep 5, 11:19 AM CDT | River Flood Warning | JAN | 10 hr |
| Sep 11, 5:00 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Sep 28, 12:03 AM CDT | Dense Fog Advisory | JAN | 9 hr |
| Sep 29, 3:59 AM CDT | Dense Fog Advisory | JAN | 5 hr |
| Oct 28, 2:46 PM CDT | Freeze Watch | JAN | 27 hr |
| Oct 29, 3:43 AM CDT | Freeze Warning | JAN | 28 hr |
| Nov 5, 4:06 AM CDT | Dense Fog Advisory | JAN | 5 hr |
| Nov 10, 4:08 AM CST | Freeze Warning | JAN | 28 hr |
| Nov 16, 1:35 AM CST | Mesoscale Discussion | SPC | 115 min |
| Dec 7, 2:05 AM CST | Winter Weather Advisory | JAN | 8 hr |
| Dec 12, 2:36 PM CST | Dense Fog Advisory | JAN | 12 hr |
| Dec 13, 7:57 PM CST | Dense Fog Advisory | JAN | 13 hr |
| Dec 21, 1:35 AM CST | Mesoscale Discussion | SPC | 85 min |
| Dec 22, 4:36 AM CST | Tornado Watch | SPC | 7 hr |
| Dec 22, 5:09 AM CST | Flash Flood Watch | JAN | 7 hr |
| Dec 22, 7:50 AM CST | Mesoscale Discussion | SPC | 55 min |
| Dec 25, 2:43 PM CST | Flood Watch | JAN | 31 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 | 31 |
| Tornado Warning | 12 |
| Severe Thunderstorm Watch | 11 |
| Tornado Watch | 14 |
| Mesoscale Discussion | 58 |
| Special Weather Statement | 20 |
| Flooding | |
| Flash Flood Warning | 12 |
| River Flood Warning | 9 |
| Flash Flood Watch | 7 |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 3 |
| Heat | |
| Excessive Heat Warning | 2 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 2 |
| Hard Freeze Warning | 2 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.