Alert archive / Mississippi / Jefferson County
Weather alerts in Jefferson County, Mississippi, 2013
139 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 139
- Warnings
- 38
- Watches
- 30
- Advisories
- 17
- Busiest month
- February29 alerts
- Busiest day
- January 10, 201311 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 4 tornado warnings covering Jefferson County in 2013 had a tornado report inside them.
Jefferson County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 1 | 75% | 0 | ||
| Severe thunderstorm warnings | 19 | 12 | 37% | 4 | 100% | 18 min |
| Flash flood warnings | 8 | 5 | 38% | 1 | 100% | 61 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 80 | 23 | 71% | 57 | 81% | 18 min |
| NWS Jackson, MS: severe thunderstorm warnings | 420 | 241 | 43% | 560 | 83% | 25 min |
| NWS Jackson, MS: flash flood warnings | 146 | 75 | 49% | 140 | 92% | 74 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 8, 2:59 PM CST | Flash Flood Watch | JAN | 13 hr |
| Jan 9, 3:35 PM CST | Flash Flood Watch | JAN | 26 hr |
| Jan 10, 2:46 AM CST | Flash Flood Warning | JAN | 7 hr |
| Jan 10, 4:31 AM CST | Tornado Watch | SPC | 6 hr |
| Jan 10, 5:34 AM CST | Flash Flood Warning | JAN | 6 hr |
| Jan 10, 6:14 AM CST | Tornado Watch | SPC | 11 hr |
| Jan 10, 6:45 AM CST | Tornado Warning | JAN | 45 min |
| Jan 10, 7:22 AM CST | Special Weather Statement | JAN | 33 min |
| Jan 10, 7:36 AM CST | Severe Thunderstorm Warning | JAN | 54 min |
| Jan 10, 7:36 AM CST | Mesoscale Discussion | SPC | 84 min |
| Jan 10, 9:19 AM CST | Flash Flood Warning | JAN | 116 min |
| Jan 10, 11:11 AM CST | Flash Flood Warning | JAN | 2 hr |
| Jan 10, 1:39 PM CST | Areal Flood Warning | JAN | 6 hr |
| Jan 12, 4:31 AM CST | Flash Flood Watch | JAN | 36 hr |
| Jan 15, 4:14 AM CST | Flash Flood Watch | JAN | 26 hr |
| Jan 16, 8:46 PM CST | Winter Weather Advisory | JAN | 12 hr |
| Jan 27, 5:19 AM CST | Dense Fog Advisory | JAN | 5 hr |
| Jan 29, 4:37 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 29, 9:49 PM CST | Mesoscale Discussion | SPC | 116 min |
| Jan 29, 10:07 PM CST | Tornado Watch | SPC | 6 hr |
| Jan 30, 1:24 AM CST | Severe Thunderstorm Warning | JAN | 96 min |
| Jan 30, 3:03 AM CST | Mesoscale Discussion | SPC | 57 min |
| Jan 30, 4:31 AM CST | Wind Advisory | JAN | 13 hr |
| Feb 5, 8:57 PM CST | Dense Fog Advisory | JAN | 12 hr |
| Feb 10, 4:59 AM CST | Flash Flood Watch | JAN | 61 hr |
| Feb 10, 10:53 AM CST | Mesoscale Discussion | SPC | 97 min |
| Feb 10, 11:10 AM CST | Tornado Watch | SPC | 7 hr |
| Feb 10, 1:10 PM CST | Severe Thunderstorm Warning | JAN | 50 min |
| Feb 10, 2:03 PM CST | Tornado Warning | JAN | 57 min |
| Feb 10, 2:35 PM CST | Severe Thunderstorm Warning | JAN | 55 min |
| Feb 12, 6:45 AM CST | Special Weather Statement | JAN | 45 min |
| Feb 12, 7:42 AM CST | Special Weather Statement | JAN | 58 min |
| Feb 12, 8:30 AM CST | Severe Thunderstorm Warning | JAN | 45 min |
| Feb 12, 11:19 AM CST | Severe Thunderstorm Warning | JAN | 56 min |
| Feb 12, 11:54 AM CST | Mesoscale Discussion | SPC | 96 min |
| Feb 21, 9:01 AM CST | Special Weather Statement | JAN | 59 min |
| Feb 21, 3:47 PM CST | Severe Thunderstorm Warning | JAN | 43 min |
| Feb 21, 3:48 PM CST | Mesoscale Discussion | SPC | 57 min |
| Feb 21, 5:02 PM CST | Tornado Warning | JAN | 43 min |
| Feb 21, 5:20 PM CST | Tornado Watch | SPC | 7 hr |
| Feb 21, 5:58 PM CST | Severe Thunderstorm Warning | JAN | 47 min |
| Feb 21, 6:22 PM CST | Tornado Warning | JAN | 53 min |
| Feb 21, 7:25 PM CST | Flash Flood Warning | JAN | 2 hr |
| Feb 21, 10:20 PM CST | Areal Flood Warning | JAN | 8 hr |
| Feb 22, 1:27 PM CST | Severe Thunderstorm Warning | JAN | 48 min |
| Feb 22, 1:28 PM CST | Mesoscale Discussion | SPC | 62 min |
| Feb 25, 9:25 AM CST | Mesoscale Discussion | SPC | 65 min |
| Feb 25, 12:26 PM CST | Tornado Watch | SPC | 10 hr |
| Feb 25, 1:29 PM CST | Severe Thunderstorm Warning | JAN | 61 min |
| Feb 25, 2:15 PM CST | Mesoscale Discussion | SPC | 90 min |
| Feb 25, 3:37 PM CST | Special Weather Statement | JAN | 28 min |
| Feb 25, 6:43 PM CST | Mesoscale Discussion | SPC | 62 min |
| Mar 3, 2:36 PM CST | Wind Advisory | JAN | 27 hr |
| Mar 18, 1:31 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Mar 18, 5:48 PM CDT | Severe Thunderstorm Warning | JAN | 42 min |
| Mar 18, 6:21 PM CDT | Severe Thunderstorm Warning | JAN | 54 min |
| Mar 18, 6:54 PM CDT | Severe Thunderstorm Warning | JAN | 21 min |
| Mar 18, 7:14 PM CDT | Severe Thunderstorm Warning | JAN | 76 min |
| Mar 22, 8:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Mar 23, 3:21 PM CDT | Wind Advisory | JAN | 28 hr |
| Mar 23, 5:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Mar 23, 5:21 PM CDT | Tornado Watch | SPC | 6 hr |
| Mar 25, 4:34 AM CDT | Wind Advisory | JAN | 13 hr |
| Mar 25, 8:17 AM CDT | Red Flag Warning | JAN | 10 hr |
| Mar 26, 4:00 AM CDT | Freeze Warning | JAN | 28 hr |
| Mar 30, 5:30 PM CDT | Special Weather Statement | JAN | 45 min |
| Mar 30, 5:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Mar 31, 11:54 AM CDT | Mesoscale Discussion | SPC | 36 min |
| Mar 31, 12:17 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 31, 1:28 PM CDT | Severe Thunderstorm Warning | JAN | 47 min |
| Mar 31, 1:59 PM CDT | Severe Thunderstorm Warning | JAN | 46 min |
| Mar 31, 2:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Mar 31, 10:20 PM CDT | Dense Fog Advisory | JAN | 11 hr |
| Apr 10, 4:58 AM CDT | Flash Flood Watch | JAN | 34 hr |
| Apr 10, 4:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Apr 10, 5:42 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 11, 6:55 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Apr 18, 1:43 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 24, 7:15 AM CDT | Special Weather Statement | JAN | 40 min |
| Apr 24, 7:53 AM CDT | Special Weather Statement | JAN | 62 min |
| Apr 29, 12:00 AM CDT | Dense Fog Advisory | JAN | 9 hr |
| May 1, 3:49 PM CDT | Special Weather Statement | JAN | 31 min |
| May 1, 9:31 PM CDT | Flood Watch | JAN | 45 hr |
| May 3, 1:08 PM CDT | River Flood Warning | JAN | 25 days |
| May 9, 7:44 PM CDT | Flash Flood Watch | JAN | 16 hr |
| May 10, 1:33 AM CDT | Special Weather Statement | JAN | 42 min |
| May 10, 2:09 AM CDT | Mesoscale Discussion | SPC | 66 min |
| May 10, 3:35 AM CDT | Special Weather Statement | JAN | 55 min |
| May 10, 4:29 AM CDT | Flash Flood Warning | JAN | 2 hr |
| May 17, 4:00 PM CDT | Mesoscale Discussion | SPC | 60 min |
| May 21, 7:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 21, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 21, 11:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 5, 1:10 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 5, 4:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 5, 4:38 PM CDT | Special Weather Statement | JAN | 62 min |
| Jun 7, 11:59 AM CDT | River Flood Advisory | JAN | 12 days |
| Jun 8, 7:13 PM CDT | Special Weather Statement | JAN | 42 min |
| Jun 9, 5:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 5:59 PM CDT | Flash Flood Warning | JAN | 91 min |
| Jun 24, 5:04 PM CDT | Special Weather Statement | JAN | 46 min |
| Jun 28, 7:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 28, 8:02 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 28, 9:48 PM CDT | Severe Thunderstorm Warning | JAN | 57 min |
| Jun 28, 10:20 PM CDT | Severe Thunderstorm Warning | JAN | 55 min |
| Jul 5, 9:39 AM CDT | Flash Flood Watch | JAN | 12 hr |
| Jul 11, 3:01 PM CDT | Special Weather Statement | JAN | 39 min |
| Jul 12, 6:04 AM CDT | Dense Fog Advisory | JAN | 3 hr |
| Jul 14, 1:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 2:01 PM CDT | Flash Flood Warning | JAN | 119 min |
| Jul 14, 3:26 PM CDT | Special Weather Statement | JAN | 29 min |
| Jul 14, 4:06 PM CDT | Severe Thunderstorm Warning | JAN | 39 min |
| Jul 18, 6:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 18, 11:48 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 20, 5:10 PM CDT | Special Weather Statement | JAN | 30 min |
| Jul 24, 5:57 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 26, 5:35 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 2:49 PM CDT | Heat Advisory | JAN | 4 days |
| Aug 13, 1:50 PM CDT | Special Weather Statement | JAN | 45 min |
| Aug 14, 4:05 AM CDT | Flash Flood Watch | JAN | 8 hr |
| Sep 20, 1:45 PM CDT | Flash Flood Watch | JAN | 20 hr |
| Sep 20, 4:34 PM CDT | Special Weather Statement | JAN | 41 min |
| Sep 21, 12:02 AM CDT | Special Weather Statement | JAN | 43 min |
| Sep 24, 10:31 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 25, 3:03 AM CDT | Dense Fog Advisory | JAN | 6 hr |
| Oct 10, 8:14 AM CDT | Dense Fog Advisory | JAN | 106 min |
| Oct 10, 8:14 PM CDT | Dense Fog Advisory | JAN | 14 hr |
| Oct 30, 2:47 PM CDT | Flash Flood Watch | JAN | 27 hr |
| Oct 31, 6:56 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 31, 7:32 AM CDT | Tornado Watch | SPC | 6 hr |
| Oct 31, 10:37 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Oct 31, 12:27 PM CDT | Tornado Watch | SPC | 7 hr |
| Nov 11, 1:13 PM CST | Freeze Warning | JAN | 44 hr |
| Nov 12, 3:52 PM CST | Freeze Warning | JAN | 41 hr |
| Nov 25, 12:47 PM CST | Flood Watch | JAN | 23 hr |
| Dec 2, 8:43 PM CST | Dense Fog Advisory | JAN | 12 hr |
| Dec 20, 11:47 AM CST | Wind Advisory | JAN | 33 hr |
| Dec 21, 5:06 PM CST | Mesoscale Discussion | SPC | 84 min |
| Dec 21, 5:22 PM CST | Tornado Watch | SPC | 7 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 | 19 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 12 |
| Mesoscale Discussion | 34 |
| Special Weather Statement | 20 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 8 |
| River Flood Warning | 1 |
| Flash Flood Watch | 11 |
| Flood Watch | 2 |
| River Flood Advisory | 1 |
| Winter | |
| Winter Weather Advisory | 1 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 3 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 9 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20122014
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.