Alert archive / Mississippi / Jefferson County
Weather alerts in Jefferson County, Mississippi, 2016
119 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 119
- Warnings
- 36
- Watches
- 18
- Advisories
- 23
- Busiest month
- March33 alerts
- Busiest day
- March 17, 201612 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 5 tornado warnings covering Jefferson County in 2016 had a tornado report inside them.
Jefferson County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 2 | 60% | 0 | ||
| Severe thunderstorm warnings | 17 | 12 | 29% | 11 | 100% | 19 min |
| Flash flood warnings | 7 | 3 | 57% | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 75 | 28 | 63% | 87 | 89% | 20 min |
| NWS Jackson, MS: severe thunderstorm warnings | 453 | 278 | 39% | 760 | 80% | 23 min |
| NWS Jackson, MS: flash flood warnings | 140 | 91 | 35% | 282 | 88% | 186 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, 5:53 AM CST | Dense Fog Advisory | JAN | 4 hr |
| Jan 21, 8:11 AM CST | Severe Thunderstorm Warning | JAN | 24 min |
| Jan 21, 1:44 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 21, 2:14 PM CST | Tornado Watch | SPC | 6 hr |
| Jan 21, 3:21 PM CST | Tornado Warning | JAN | 54 min |
| Jan 21, 3:59 PM CST | Tornado Warning | JAN | 61 min |
| Jan 21, 4:17 PM CST | Tornado Warning | JAN | 42 min |
| Jan 21, 5:03 PM CST | Flash Flood Warning | JAN | 2 hr |
| Feb 2, 10:41 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 2, 1:18 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 2, 5:18 PM CST | Mesoscale Discussion | SPC | 117 min |
| Feb 2, 6:27 PM CST | Flash Flood Warning | JAN | 4 hr |
| Feb 2, 11:17 PM CST | Areal Flood Warning | JAN | 18 hr |
| Feb 8, 2:52 AM CST | Wind Advisory | JAN | 15 hr |
| Feb 9, 3:08 AM CST | Wind Advisory | JAN | 15 hr |
| Feb 15, 7:41 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Feb 15, 9:30 AM CST | Tornado Watch | SPC | 8 hr |
| Feb 15, 10:56 AM CST | Severe Thunderstorm Warning | JAN | 64 min |
| Feb 15, 11:10 AM CST | Tornado Warning | JAN | 38 min |
| Feb 15, 1:05 PM CST | Severe Thunderstorm Warning | JAN | 58 min |
| Feb 22, 3:55 PM CST | Wind Advisory | JAN | 47 hr |
| Feb 23, 1:15 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 23, 2:20 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 23, 8:12 PM CST | Severe Thunderstorm Warning | JAN | 62 min |
| Mar 1, 4:51 PM CST | Mesoscale Discussion | SPC | 114 min |
| Mar 8, 11:30 PM CST | Flash Flood Watch | JAN | 4 days |
| Mar 9, 9:54 AM CST | Wind Advisory | JAN | 6 hr |
| Mar 9, 11:00 AM CST | River Flood Advisory | JAN | 36 hr |
| Mar 10, 9:50 AM CST | Special Weather Statement | JAN | 40 min |
| Mar 10, 10:06 AM CST | Severe Thunderstorm Warning | JAN | 54 min |
| Mar 10, 11:38 AM CST | River Flood Warning | JAN | 4 days |
| Mar 10, 1:32 PM CST | Flash Flood Warning | JAN | 6 hr |
| Mar 11, 7:04 AM CST | Flash Flood Warning | JAN | 6 hr |
| Mar 12, 8:29 AM CST | Areal Flood Warning | JAN | 9 hr |
| Mar 12, 3:47 PM CST | Flash Flood Warning | JAN | 5 hr |
| Mar 12, 4:31 PM CST | Flash Flood Warning | JAN | 5 hr |
| Mar 14, 11:38 AM CDT | River Flood Advisory | JAN | 36 hr |
| Mar 16, 11:13 AM CDT | River Flood Advisory | JAN | 36 hr |
| Mar 17, 10:50 AM CDT | River Flood Warning | JAN | 5 days |
| Mar 17, 12:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Mar 17, 1:01 PM CDT | Special Weather Statement | JAN | 14 min |
| Mar 17, 1:05 PM CDT | Severe Thunderstorm Warning | JAN | 40 min |
| Mar 17, 1:19 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Mar 17, 1:45 PM CDT | Severe Thunderstorm Warning | JAN | 60 min |
| Mar 17, 2:50 PM CDT | Special Weather Statement | JAN | 40 min |
| Mar 17, 3:07 PM CDT | Severe Thunderstorm Warning | JAN | 53 min |
| Mar 17, 3:24 PM CDT | Severe Thunderstorm Warning | JAN | 51 min |
| Mar 17, 3:47 PM CDT | Severe Thunderstorm Warning | JAN | 58 min |
| Mar 17, 3:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Mar 17, 6:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Mar 18, 4:35 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Mar 29, 1:52 PM CDT | Flash Flood Watch | JAN | 63 hr |
| Mar 30, 7:20 PM CDT | Severe Thunderstorm Warning | JAN | 40 min |
| Mar 30, 10:00 PM CDT | Tornado Watch | SPC | 6 hr |
| Mar 30, 11:30 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Mar 31, 1:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 2:35 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 9, 1:41 PM CDT | Wind Advisory | JAN | 31 hr |
| Apr 11, 12:15 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 11, 1:05 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 11, 3:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 11, 6:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 11, 6:58 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 14, 1:44 PM CDT | Special Weather Statement | JAN | 46 min |
| Apr 14, 2:00 PM CDT | Severe Thunderstorm Warning | JAN | 27 min |
| Apr 27, 7:54 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 29, 4:06 PM CDT | Flash Flood Watch | JAN | 24 hr |
| May 12, 2:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| May 18, 3:10 AM CDT | Dense Fog Advisory | JAN | 6 hr |
| May 27, 4:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| May 30, 4:18 PM CDT | Special Weather Statement | JAN | 27 min |
| Jun 3, 12:45 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 14, 3:33 PM CDT | Heat Advisory | JAN | 3 days |
| Jun 18, 7:17 AM CDT | Special Weather Statement | JAN | 28 min |
| Jul 3, 3:27 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 4, 1:54 PM CDT | Special Weather Statement | JAN | 51 min |
| Jul 5, 3:14 PM CDT | Heat Advisory | JAN | 3 days |
| Jul 11, 4:52 PM CDT | Special Weather Statement | JAN | 38 min |
| Jul 13, 5:32 PM CDT | Special Weather Statement | JAN | 28 min |
| Jul 14, 7:08 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 14, 10:15 PM CDT | Severe Thunderstorm Warning | JAN | 29 min |
| Jul 14, 10:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 5:54 PM CDT | Special Weather Statement | JAN | 36 min |
| Jul 18, 4:02 AM CDT | Heat Advisory | JAN | 6 days |
| Jul 22, 4:55 PM CDT | Severe Thunderstorm Warning | JAN | 50 min |
| Jul 22, 5:26 PM CDT | Severe Thunderstorm Warning | JAN | 49 min |
| Aug 2, 2:35 PM CDT | Heat Advisory | JAN | 4 days |
| Aug 11, 3:59 AM CDT | Flash Flood Watch | JAN | 3 days |
| Aug 16, 4:51 PM CDT | Special Weather Statement | JAN | 24 min |
| Aug 16, 5:19 PM CDT | Special Weather Statement | JAN | 26 min |
| Aug 23, 2:54 PM CDT | Heat Advisory | JAN | 28 hr |
| Nov 3, 5:16 AM CDT | Dense Fog Advisory | JAN | 5 hr |
| Nov 19, 3:43 AM CST | Freeze Warning | JAN | 28 hr |
| Nov 19, 4:55 AM CST | Red Flag Warning | JAN | 13 hr |
| Nov 20, 4:00 AM CST | Freeze Warning | JAN | 29 hr |
| Nov 24, 5:03 AM CST | Dense Fog Advisory | JAN | 4 hr |
| Nov 25, 4:58 AM CST | Dense Fog Advisory | JAN | 4 hr |
| Nov 27, 1:04 PM CST | Wind Advisory | JAN | 30 hr |
| Nov 28, 2:23 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Nov 28, 2:49 PM CST | Tornado Watch | SPC | 6 hr |
| Nov 28, 3:20 PM CST | Severe Thunderstorm Warning | JAN | 17 min |
| Nov 29, 12:38 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Nov 29, 1:31 PM CST | Severe Thunderstorm Warning | JAN | 44 min |
| Nov 29, 1:48 PM CST | Tornado Watch | SPC | 7 hr |
| Nov 29, 4:20 PM CST | Mesoscale Discussion | SPC | 55 min |
| Nov 29, 6:06 PM CST | Mesoscale Discussion | SPC | 114 min |
| Nov 29, 8:03 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Nov 29, 8:50 PM CST | Tornado Watch | SPC | 8 hr |
| Nov 29, 9:47 PM CST | Mesoscale Discussion | SPC | 58 min |
| Nov 29, 9:55 PM CST | Tornado Warning | JAN | 41 min |
| Nov 29, 11:37 PM CST | Mesoscale Discussion | SPC | 113 min |
| Nov 30, 1:04 AM CST | Special Weather Statement | JAN | 56 min |
| Dec 13, 2:24 AM CST | Dense Fog Advisory | JAN | 7 hr |
| Dec 13, 9:24 AM CST | Special Weather Statement | JAN | 51 min |
| Dec 17, 11:48 PM CST | Mesoscale Discussion | SPC | 87 min |
| Dec 18, 1:05 AM CST | Special Weather Statement | JAN | 55 min |
| Dec 23, 2:31 PM CST | Dense Fog Advisory | JAN | 19 hr |
| Dec 24, 5:39 PM CST | Dense Fog Advisory | JAN | 15 hr |
| Dec 29, 1:35 AM CST | Mesoscale Discussion | SPC | 115 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 | 17 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 9 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 15 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 7 |
| River Flood Warning | 2 |
| Flash Flood Watch | 4 |
| River Flood Advisory | 3 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 2 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 1 |
| 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 archive20152017
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.