Alert archive / Mississippi / Marion County
Weather alerts in Marion County, Mississippi, 2017
138 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Marion County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 138
- Warnings
- 28
- Watches
- 28
- Advisories
- 30
- Busiest month
- January26 alerts
- Busiest day
- January 21, 20179 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 3 tornado warnings covering Marion County in 2017 had a tornado report inside them.
Marion County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 2 | 33% | 0 | ||
| Severe thunderstorm warnings | 9 | 8 | 11% | 12 | 92% | 28 min |
| Flash flood warnings | 10 | 7 | 30% | 7 | 71% | 77 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 84 | 34 | 60% | 98 | 86% | 22 min |
| NWS Jackson, MS: severe thunderstorm warnings | 380 | 246 | 35% | 733 | 78% | 22 min |
| NWS Jackson, MS: flash flood warnings | 128 | 78 | 39% | 257 | 79% | 68 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, 8:31 AM CST | Flash Flood Watch | JAN | 9 hr |
| Jan 2, 9:30 AM CST | Flash Flood Watch | JAN | 8 hr |
| Jan 2, 10:17 AM CST | Mesoscale Discussion | SPC | 118 min |
| Jan 2, 11:22 AM CST | Tornado Watch | SPC | 9 hr |
| Jan 2, 2:03 PM CST | Mesoscale Discussion | SPC | 117 min |
| Jan 2, 2:25 PM CST | Severe Thunderstorm Warning | JAN | 22 min |
| Jan 3, 5:36 AM CST | Dense Fog Advisory | JAN | 3 hr |
| Jan 5, 1:04 PM CST | Winter Weather Advisory | JAN | 33 hr |
| Jan 6, 10:40 AM CST | Winter Storm Warning | JAN | 11 hr |
| Jan 6, 7:05 PM CST | Hard Freeze Warning | JAN | 41 hr |
| Jan 6, 9:48 PM CST | Wind Chill Advisory | JAN | 13 hr |
| Jan 12, 3:13 PM CST | Dense Fog Advisory | JAN | 18 hr |
| Jan 13, 7:37 PM CST | Dense Fog Advisory | JAN | 13 hr |
| Jan 15, 3:42 AM CST | Dense Fog Advisory | JAN | 6 hr |
| Jan 18, 1:58 AM CST | Dense Fog Advisory | JAN | 7 hr |
| Jan 20, 10:44 PM CST | Mesoscale Discussion | SPC | 61 min |
| Jan 20, 11:00 PM CST | Tornado Watch | SPC | 8 hr |
| Jan 21, 2:29 AM CST | Severe Thunderstorm Warning | JAN | 61 min |
| Jan 21, 2:55 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 21, 2:57 AM CST | Tornado Warning | JAN | 63 min |
| Jan 21, 3:38 AM CST | Severe Thunderstorm Warning | JAN | 25 min |
| Jan 21, 4:31 AM CST | Flash Flood Warning | JAN | 4 hr |
| Jan 21, 2:34 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 21, 3:29 PM CST | Tornado Watch | SPC | 6 hr |
| Jan 21, 6:05 PM CST | Mesoscale Discussion | SPC | 85 min |
| Jan 21, 7:50 PM CST | Tornado Watch | SPC | 4 hr |
| Feb 7, 5:59 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 7, 7:54 AM CST | Tornado Watch | SPC | 11 hr |
| Feb 7, 8:15 AM CST | Special Weather Statement | JAN | 30 min |
| Feb 7, 8:22 AM CST | Severe Thunderstorm Warning | JAN | 29 min |
| Feb 7, 8:59 AM CST | Special Weather Statement | JAN | 31 min |
| Feb 7, 10:18 AM CST | Mesoscale Discussion | SPC | 117 min |
| Feb 7, 10:24 AM CST | Special Weather Statement | JAN | 51 min |
| Feb 7, 10:36 AM CST | Tornado Warning | JAN | 54 min |
| Feb 7, 12:56 PM CST | Mesoscale Discussion | SPC | 64 min |
| Feb 18, 6:45 AM CST | Dense Fog Advisory | JAN | 3 hr |
| Feb 18, 2:39 PM CST | Dense Fog Advisory | JAN | 18 hr |
| Feb 20, 3:29 AM CST | Dense Fog Advisory | JAN | 6 hr |
| Feb 22, 3:14 AM CST | Dense Fog Advisory | JAN | 7 hr |
| Feb 22, 2:28 PM CST | Dense Fog Advisory | JAN | 18 hr |
| Feb 23, 9:42 PM CST | Dense Fog Advisory | JAN | 10 hr |
| Mar 1, 1:32 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 7, 4:34 PM CST | Special Weather Statement | JAN | 41 min |
| Mar 9, 5:32 PM CST | Severe Thunderstorm Warning | JAN | 43 min |
| Mar 30, 1:34 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Mar 31, 5:09 AM CDT | Dense Fog Advisory | JAN | 4 hr |
| Apr 2, 4:54 AM CDT | Flash Flood Watch | JAN | 28 hr |
| Apr 2, 4:52 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 2, 9:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 2, 11:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 3, 1:48 AM CDT | Tornado Watch | SPC | 10 hr |
| Apr 3, 3:23 AM CDT | Severe Thunderstorm Warning | JAN | 52 min |
| Apr 3, 3:59 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 3, 4:19 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Apr 3, 11:49 AM CDT | River Flood Warning | JAN | 12 days |
| Apr 20, 6:12 AM CDT | Dense Fog Advisory | JAN | 3 hr |
| Apr 22, 8:11 PM CDT | Special Weather Statement | JAN | 34 min |
| Apr 26, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 26, 11:40 PM CDT | Severe Thunderstorm Warning | JAN | 23 min |
| Apr 28, 3:43 PM CDT | Wind Advisory | JAN | 33 hr |
| Apr 29, 11:50 AM CDT | Flash Flood Watch | JAN | 28 hr |
| Apr 30, 6:59 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 30, 7:32 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 30, 9:50 AM CDT | Severe Thunderstorm Warning | JAN | 55 min |
| Apr 30, 11:12 AM CDT | Flash Flood Warning | JAN | 3 hr |
| May 2, 3:20 PM CDT | Flash Flood Watch | JAN | 29 hr |
| May 3, 3:48 AM CDT | Wind Advisory | JAN | 24 hr |
| May 12, 9:56 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 12, 1:43 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 20, 2:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 20, 2:39 PM CDT | Flash Flood Watch | JAN | 6 hr |
| May 21, 7:19 AM CDT | Special Weather Statement | JAN | 41 min |
| May 21, 2:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 21, 3:13 PM CDT | Flash Flood Watch | JAN | 40 hr |
| May 28, 10:50 AM CDT | Special Weather Statement | JAN | 55 min |
| May 28, 7:08 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 3, 2:52 PM CDT | Special Weather Statement | JAN | 53 min |
| Jun 3, 2:55 PM CDT | Special Weather Statement | JAN | 50 min |
| Jun 16, 12:05 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 12:42 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 16, 3:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 6:19 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 16, 9:13 PM CDT | Severe Thunderstorm Warning | JAN | 77 min |
| Jun 17, 1:21 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 2:19 PM CDT | Special Weather Statement | JAN | 41 min |
| Jun 19, 2:44 PM CDT | Flash Flood Watch | JAN | 4 days |
| Jun 19, 7:21 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Jun 21, 4:56 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Jun 21, 10:01 AM CDT | Tornado Watch | SPC | 9 hr |
| Jun 21, 11:31 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Jun 21, 3:48 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Jun 21, 4:36 PM CDT | Special Weather Statement | JAN | 39 min |
| Jun 21, 6:29 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Jun 22, 2:24 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 22, 2:57 AM CDT | Tornado Watch | SPC | 10 hr |
| Jun 22, 11:50 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 22, 1:04 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 22, 3:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 22, 8:57 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 24, 3:42 AM CDT | Flash Flood Watch | JAN | 15 hr |
| Jun 30, 3:30 PM CDT | Special Weather Statement | LIX | 30 min |
| Jul 9, 6:46 PM CDT | Special Weather Statement | JAN | 59 min |
| Jul 15, 7:11 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Jul 22, 4:12 PM CDT | Special Weather Statement | JAN | 33 min |
| Jul 24, 11:22 AM CDT | Flash Flood Watch | JAN | 8 hr |
| Jul 24, 2:31 PM CDT | Special Weather Statement | JAN | 44 min |
| Jul 28, 2:53 PM CDT | Flash Flood Watch | JAN | 21 hr |
| Aug 8, 3:18 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Aug 10, 2:42 AM CDT | Flash Flood Watch | JAN | 16 hr |
| Aug 18, 3:02 PM CDT | Heat Advisory | JAN | 52 hr |
| Aug 19, 3:21 PM CDT | Special Weather Statement | JAN | 39 min |
| Aug 23, 9:49 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Aug 29, 10:54 AM CDT | Flash Flood Watch | JAN | 56 hr |
| Aug 30, 9:51 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 30, 10:22 AM CDT | Tornado Watch | SPC | 8 hr |
| Aug 30, 11:36 AM CDT | Special Weather Statement | JAN | 24 min |
| Aug 30, 11:55 AM CDT | Tornado Warning | JAN | 65 min |
| Aug 30, 5:50 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Sep 17, 7:23 AM CDT | Dense Fog Advisory | JAN | 3 hr |
| Sep 23, 6:37 PM CDT | Special Weather Statement | JAN | 38 min |
| Sep 23, 7:19 PM CDT | Special Weather Statement | JAN | 26 min |
| Oct 7, 10:50 AM CDT | Wind Advisory | JAN | 17 hr |
| Oct 7, 6:50 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Oct 22, 5:41 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 16, 3:47 AM CST | Dense Fog Advisory | JAN | 5 hr |
| Nov 19, 2:58 PM CST | Freeze Warning | JAN | 17 hr |
| Nov 30, 1:04 AM CST | Dense Fog Advisory | JAN | 9 hr |
| Nov 30, 7:33 PM CST | Dense Fog Advisory | JAN | 14 hr |
| Dec 1, 1:57 PM CST | Dense Fog Advisory | JAN | 20 hr |
| Dec 2, 1:43 PM CST | Dense Fog Advisory | JAN | 19 hr |
| Dec 7, 3:33 AM CST | Winter Weather Advisory | JAN | 32 hr |
| Dec 7, 2:44 PM CST | Winter Storm Warning | JAN | 21 hr |
| Dec 8, 12:08 PM CST | Winter Storm Warning | JAN | 4 hr |
| Dec 17, 5:18 PM CST | Dense Fog Advisory | JAN | 16 hr |
| Dec 18, 3:45 PM CST | Dense Fog Advisory | JAN | 16 hr |
| Dec 20, 6:18 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 21, 2:05 AM CST | Dense Fog Advisory | JAN | 8 hr |
| Dec 21, 2:33 PM CST | Dense Fog Advisory | JAN | 19 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 | 9 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 12 |
| Mesoscale Discussion | 33 |
| Special Weather Statement | 19 |
| Flooding | |
| Flash Flood Warning | 10 |
| River Flood Warning | 1 |
| Flash Flood Watch | 13 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Hard Freeze Warning | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 23 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.