Alert archive / Mississippi / Jefferson County
Weather alerts in Jefferson County, Mississippi, 2015
125 weather alerts in 2015, 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 2015. Tap one for its archive.
- Alerts
- 125
- Warnings
- 35
- Watches
- 17
- Advisories
- 31
- Busiest month
- May20 alerts
- Busiest day
- November 18, 20158 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Jefferson County in 2015 had a tornado report inside them.
Jefferson County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 24 | 15 | 38% | 4 | 100% | 29 min |
| Flash flood warnings | 4 | 2 | 50% | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 53 | 18 | 66% | 67 | 81% | 17 min |
| NWS Jackson, MS: severe thunderstorm warnings | 441 | 223 | 49% | 526 | 75% | 22 min |
| NWS Jackson, MS: flash flood warnings | 95 | 42 | 56% | 113 | 76% | 67 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 2, 3:01 PM CST | Flash Flood Watch | JAN | 33 hr |
| Jan 3, 10:24 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 3, 11:04 AM CST | Tornado Watch | SPC | 7 hr |
| Jan 6, 5:05 AM CST | Hard Freeze Watch | JAN | 22 hr |
| Jan 6, 3:14 PM CST | Hard Freeze Warning | JAN | 51 hr |
| Jan 7, 3:23 AM CST | Wind Chill Advisory | JAN | 30 hr |
| Jan 7, 2:49 PM CST | Wind Advisory | JAN | 3 hr |
| Jan 8, 9:59 PM CST | Winter Weather Advisory | JAN | 14 hr |
| Feb 1, 2:28 PM CST | Mesoscale Discussion | SPC | 92 min |
| Feb 1, 5:29 PM CST | Severe Thunderstorm Warning | JAN | 46 min |
| Feb 16, 2:45 PM CST | Winter Weather Advisory | JAN | 7 hr |
| Feb 22, 4:21 AM CST | Freezing Rain Advisory | JAN | 53 hr |
| Feb 24, 3:06 PM CST | Winter Weather Advisory | JAN | 31 hr |
| Mar 2, 1:54 AM CST | Dense Fog Advisory | JAN | 8 hr |
| Mar 2, 2:39 PM CST | Dense Fog Advisory | JAN | 18 hr |
| Mar 4, 3:12 PM CST | Winter Weather Advisory | JAN | 23 hr |
| Mar 5, 4:03 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Mar 10, 3:06 AM CDT | Special Weather Statement | JAN | 39 min |
| Mar 11, 12:59 PM CDT | River Flood Advisory | JAN | 36 hr |
| Mar 11, 3:29 PM CDT | Flash Flood Watch | JAN | 47 hr |
| Mar 13, 12:55 PM CDT | River Flood Advisory | JAN | 36 hr |
| Mar 15, 11:46 AM CDT | River Flood Advisory | JAN | 16 days |
| Mar 18, 4:24 PM CDT | Special Weather Statement | JAN | 31 min |
| Apr 1, 11:20 AM CDT | River Flood Advisory | JAN | 36 hr |
| Apr 1, 11:39 AM CDT | River Flood Warning | JAN | 40 hr |
| Apr 9, 2:13 PM CDT | River Flood Advisory | JAN | 10 days |
| Apr 15, 6:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 16, 5:20 PM CDT | Special Weather Statement | JAN | 25 min |
| Apr 18, 6:17 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 19, 2:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 19, 8:02 PM CDT | Tornado Watch | SPC | 5 hr |
| Apr 19, 10:16 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Apr 20, 11:51 AM CDT | River Flood Advisory | JAN | 36 hr |
| Apr 22, 11:36 AM CDT | River Flood Advisory | JAN | 36 hr |
| Apr 24, 12:25 PM CDT | River Flood Advisory | JAN | 36 hr |
| Apr 25, 12:50 AM CDT | Tornado Watch | SPC | 6 hr |
| Apr 27, 10:19 AM CDT | Special Weather Statement | JAN | 41 min |
| Apr 27, 11:00 AM CDT | River Flood Advisory | JAN | 36 hr |
| May 15, 2:28 PM CDT | Special Weather Statement | JAN | 47 min |
| May 16, 4:05 PM CDT | Special Weather Statement | JAN | 25 min |
| May 17, 10:58 PM CDT | Severe Thunderstorm Warning | JAN | 62 min |
| May 17, 11:39 PM CDT | Severe Thunderstorm Warning | JAN | 51 min |
| May 18, 3:48 AM CDT | Flash Flood Watch | JAN | 11 hr |
| May 19, 5:32 AM CDT | Dense Fog Advisory | JAN | 3 hr |
| May 24, 1:49 PM CDT | Tornado Watch | SPC | 8 hr |
| May 24, 5:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| May 24, 7:10 PM CDT | Severe Thunderstorm Warning | JAN | 50 min |
| May 24, 7:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 25, 3:18 PM CDT | Severe Thunderstorm Warning | JAN | 42 min |
| May 25, 3:53 PM CDT | Severe Thunderstorm Warning | JAN | 52 min |
| May 25, 10:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| May 25, 10:37 PM CDT | Tornado Watch | SPC | 6 hr |
| May 25, 11:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 26, 12:16 AM CDT | Severe Thunderstorm Warning | JAN | 59 min |
| May 26, 12:54 AM CDT | Severe Thunderstorm Warning | JAN | 51 min |
| May 29, 5:14 PM CDT | Severe Thunderstorm Warning | JAN | 46 min |
| May 29, 5:59 PM CDT | Severe Thunderstorm Warning | JAN | 46 min |
| May 30, 4:27 PM CDT | Severe Thunderstorm Warning | JAN | 48 min |
| Jun 9, 5:12 PM CDT | Severe Thunderstorm Warning | JAN | 48 min |
| Jun 10, 7:09 PM CDT | Severe Thunderstorm Warning | JAN | 21 min |
| Jun 17, 5:15 PM CDT | River Flood Advisory | JAN | 17 days |
| Jun 24, 1:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jun 25, 6:34 PM CDT | Special Weather Statement | JAN | 26 min |
| Jun 25, 6:42 PM CDT | Severe Thunderstorm Warning | JAN | 33 min |
| Jun 26, 1:02 PM CDT | River Flood Warning | JAN | 40 days |
| Jun 29, 6:13 PM CDT | Severe Thunderstorm Warning | JAN | 62 min |
| Jun 29, 7:17 PM CDT | Special Weather Statement | JAN | 43 min |
| Jun 30, 1:09 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 4:56 PM CDT | Special Weather Statement | JAN | 34 min |
| Jul 5, 4:15 PM CDT | Severe Thunderstorm Warning | JAN | 48 min |
| Jul 5, 5:34 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Jul 7, 5:04 PM CDT | Special Weather Statement | JAN | 26 min |
| Jul 12, 3:28 AM CDT | Heat Advisory | JAN | 11 days |
| Jul 23, 3:15 AM CDT | Heat Advisory | JAN | 40 hr |
| Jul 24, 9:37 PM CDT | Heat Advisory | JAN | 6 days |
| Jul 25, 8:06 PM CDT | Severe Thunderstorm Warning | JAN | 54 min |
| Jul 27, 6:24 PM CDT | Special Weather Statement | JAN | 36 min |
| Jul 30, 5:40 PM CDT | Severe Thunderstorm Warning | JAN | 40 min |
| Jul 30, 5:59 PM CDT | Severe Thunderstorm Warning | JAN | 38 min |
| Aug 6, 3:49 PM CDT | Heat Advisory | JAN | 61 hr |
| Aug 8, 4:57 AM CDT | Excessive Heat Warning | JAN | 62 hr |
| Aug 10, 4:06 AM CDT | Heat Advisory | JAN | 39 hr |
| Aug 11, 6:24 AM CDT | Special Weather Statement | JAN | 51 min |
| Aug 22, 4:26 PM CDT | Special Weather Statement | JAN | 34 min |
| Sep 5, 3:54 PM CDT | Special Weather Statement | JAN | 36 min |
| Sep 6, 9:02 PM CDT | Special Weather Statement | JAN | 28 min |
| Oct 15, 2:12 PM CDT | Fire Weather Watch | JAN | 3 days |
| Oct 25, 3:50 AM CDT | Flash Flood Watch | JAN | 30 hr |
| Oct 26, 4:55 AM CDT | Wind Advisory | JAN | 14 hr |
| Oct 31, 3:54 AM CDT | Flash Flood Watch | JAN | 20 hr |
| Oct 31, 11:45 AM CDT | Tornado Watch | SPC | 8 hr |
| Oct 31, 12:13 PM CDT | Special Weather Statement | JAN | 47 min |
| Oct 31, 1:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Oct 31, 3:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Oct 31, 5:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Nov 16, 10:35 AM CST | Flash Flood Watch | JAN | 43 hr |
| Nov 16, 3:11 PM CST | Wind Advisory | JAN | 27 hr |
| Nov 17, 12:19 PM CST | Mesoscale Discussion | SPC | 116 min |
| Nov 17, 12:36 PM CST | Tornado Watch | SPC | 7 hr |
| Nov 17, 6:53 PM CST | Mesoscale Discussion | SPC | 97 min |
| Nov 17, 7:40 PM CST | Severe Thunderstorm Warning | JAN | 35 min |
| Nov 17, 7:45 PM CST | Tornado Watch | SPC | 7 hr |
| Nov 17, 8:08 PM CST | Severe Thunderstorm Warning | JAN | 52 min |
| Nov 17, 8:52 PM CST | Special Weather Statement | JAN | 23 min |
| Nov 17, 9:02 PM CST | Severe Thunderstorm Warning | JAN | 58 min |
| Nov 17, 9:38 PM CST | Flash Flood Warning | JAN | 4 hr |
| Nov 18, 1:34 AM CST | Areal Flood Warning | JAN | 6 hr |
| Nov 21, 3:56 AM CST | Freeze Warning | JAN | 53 hr |
| Dec 10, 12:03 AM CST | Dense Fog Advisory | JAN | 9 hr |
| Dec 12, 2:50 PM CST | Wind Advisory | JAN | 33 hr |
| Dec 21, 5:47 PM CST | Mesoscale Discussion | SPC | 118 min |
| Dec 22, 5:00 AM CST | Dense Fog Advisory | JAN | 5 hr |
| Dec 23, 2:34 AM CST | Mesoscale Discussion | SPC | 86 min |
| Dec 25, 12:44 PM CST | Flash Flood Warning | JAN | 3 hr |
| Dec 25, 1:46 PM CST | Flash Flood Warning | JAN | 3 hr |
| Dec 25, 4:28 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Dec 25, 6:41 PM CST | Special Weather Statement | JAN | 34 min |
| Dec 27, 3:15 PM CST | Mesoscale Discussion | SPC | 90 min |
| Dec 27, 3:38 PM CST | Wind Advisory | JAN | 16 hr |
| Dec 27, 9:57 PM CST | Tornado Watch | SPC | 7 hr |
| Dec 27, 11:49 PM CST | Mesoscale Discussion | SPC | 86 min |
| Dec 28, 1:44 AM CST | Severe Thunderstorm Warning | JAN | 61 min |
| Dec 28, 2:03 AM CST | Mesoscale Discussion | SPC | 117 min |
| Dec 28, 2:21 AM CST | Tornado Warning | JAN | 54 min |
| Dec 28, 3:11 AM CST | Severe Thunderstorm Warning | JAN | 64 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 | 24 |
| Tornado Warning | 1 |
| Tornado Watch | 9 |
| Mesoscale Discussion | 24 |
| Special Weather Statement | 18 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 4 |
| River Flood Warning | 2 |
| Flash Flood Watch | 6 |
| River Flood Advisory | 10 |
| Winter | |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 4 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 1 |
| Hard Freeze Warning | 1 |
| Hard Freeze Watch | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fire | |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.