Alert archive / Louisiana / Jackson Parish
Weather alerts in Jackson Parish, Louisiana, 2020
122 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jackson Parish and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 122
- Warnings
- 32
- Watches
- 18
- Advisories
- 27
- Busiest month
- April43 alerts
- Busiest day
- April 12, 20208 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 2 tornado warnings covering Jackson Parish in 2020 had a tornado report inside them.
Jackson Parish, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 17 | 16 | 6% | 5 | 100% | 25 min |
| Flash flood warnings | 8 | 8 | 0% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Shreveport, LA: tornado warnings | 77 | 29 | 62% | 67 | 63% | 14 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 252 | 186 | 26% | 540 | 79% | 24 min |
| NWS Shreveport, LA: flash flood warnings | 55 | 37 | 33% | 117 | 90% | 105 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 9, 8:39 PM CST | Lake Wind Advisory | SHV | 32 hr |
| Jan 10, 4:55 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 11, 12:28 AM CST | Tornado Watch | SPC | 8 hr |
| Jan 11, 1:19 AM CST | Mesoscale Discussion | SPC | 86 min |
| Jan 11, 2:16 AM CST | Severe Thunderstorm Warning | SHV | 59 min |
| Jan 11, 3:01 AM CST | Special Weather Statement | SHV | 59 min |
| Jan 11, 3:24 AM CST | Severe Thunderstorm Warning | SHV | 51 min |
| Jan 11, 4:27 AM CST | Lake Wind Advisory | SHV | 12 hr |
| Jan 14, 8:35 PM CST | Dense Fog Advisory | SHV | 12 hr |
| Jan 15, 11:10 PM CST | Dense Fog Advisory | SHV | 10 hr |
| Feb 5, 12:42 PM CST | Severe Thunderstorm Warning | SHV | 32 min |
| Feb 9, 3:56 PM CST | Flash Flood Watch | SHV | 71 hr |
| Feb 10, 12:39 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 10, 1:29 PM CST | Areal Flood Advisory | SHV | 3 hr |
| Feb 10, 2:19 PM CST | Flash Flood Warning | SHV | 3 hr |
| Feb 10, 6:01 PM CST | Mesoscale Discussion | SPC | 89 min |
| Feb 23, 1:30 PM CST | Lake Wind Advisory | SHV | 29 hr |
| Mar 1, 4:46 AM CST | Lake Wind Advisory | SHV | 13 hr |
| Mar 4, 1:19 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 4, 3:37 AM CST | Severe Thunderstorm Warning | SHV | 53 min |
| Mar 4, 4:20 AM CST | Mesoscale Discussion | SPC | 115 min |
| Mar 4, 5:02 AM CST | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 4, 10:50 AM CST | Mesoscale Discussion | SPC | 115 min |
| Apr 12, 2:45 AM CDT | Lake Wind Advisory | SHV | 21 hr |
| Apr 12, 5:52 AM CDT | Tornado Watch | SPC | 8 hr |
| Apr 12, 7:18 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Apr 12, 9:30 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Apr 12, 10:46 AM CDT | Tornado Warning | SHV | 29 min |
| Apr 12, 10:47 AM CDT | Severe Thunderstorm Warning | SHV | 58 min |
| Apr 12, 3:37 PM CDT | Special Weather Statement | SHV | 38 min |
| Apr 12, 5:59 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 12, 8:17 PM CDT | Special Weather Statement | SHV | 43 min |
| Apr 12, 9:05 PM CDT | Special Weather Statement | SHV | 40 min |
| Apr 19, 8:41 AM CDT | Tornado Watch | SPC | 6 hr |
| Apr 19, 10:45 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 19, 11:40 AM CDT | Severe Thunderstorm Warning | SHV | 65 min |
| Apr 19, 12:47 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Apr 19, 2:39 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 21, 2:58 PM CDT | Flash Flood Watch | SHV | 35 hr |
| Apr 22, 12:01 PM CDT | Severe Thunderstorm Warning | SHV | 29 min |
| Apr 22, 4:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 22, 5:01 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 22, 5:22 PM CDT | Flash Flood Warning | SHV | 3 hr |
| Apr 22, 6:10 PM CDT | Flash Flood Warning | SHV | 3 hr |
| Apr 22, 6:28 PM CDT | Flash Flood Warning | SHV | 94 min |
| Apr 22, 7:14 PM CDT | Special Weather Statement | SHV | 46 min |
| Apr 22, 8:49 PM CDT | Special Weather Statement | SHV | 41 min |
| Apr 22, 9:12 PM CDT | Flash Flood Warning | SHV | 109 min |
| Apr 22, 9:58 PM CDT | Severe Thunderstorm Warning | SHV | 62 min |
| Apr 22, 10:13 PM CDT | Tornado Warning | SHV | 47 min |
| Apr 22, 10:16 PM CDT | Flash Flood Warning | SHV | 3 hr |
| Apr 22, 10:38 PM CDT | Severe Thunderstorm Warning | SHV | 52 min |
| Apr 24, 7:43 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Apr 24, 8:31 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 24, 9:53 PM CDT | Severe Thunderstorm Warning | SHV | 52 min |
| Apr 24, 10:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Apr 24, 10:42 PM CDT | Severe Thunderstorm Warning | SHV | 63 min |
| Apr 24, 11:24 PM CDT | Severe Thunderstorm Warning | SHV | 28 min |
| Apr 28, 10:09 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 28, 11:09 AM CDT | Special Weather Statement | SHV | 51 min |
| Apr 28, 11:57 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Apr 29, 12:48 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 29, 1:34 AM CDT | Severe Thunderstorm Warning | SHV | 56 min |
| Apr 29, 1:37 AM CDT | Severe Thunderstorm Warning | SHV | 68 min |
| Apr 29, 1:56 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 29, 3:21 PM CDT | Lake Wind Advisory | SHV | 4 hr |
| May 8, 1:12 AM CDT | Lake Wind Advisory | SHV | 18 hr |
| May 8, 3:06 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 8, 5:22 AM CDT | Mesoscale Discussion | SPC | 83 min |
| May 8, 6:24 AM CDT | Severe Thunderstorm Warning | SHV | 51 min |
| May 8, 7:05 AM CDT | Severe Thunderstorm Warning | SHV | 40 min |
| May 16, 1:16 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 23, 11:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| May 24, 12:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| May 25, 3:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| May 27, 1:03 AM CDT | Special Weather Statement | SHV | 42 min |
| May 27, 1:45 AM CDT | Special Weather Statement | SHV | 45 min |
| Jun 7, 10:15 AM CDT | Lake Wind Advisory | SHV | 9 hr |
| Jun 8, 8:02 AM CDT | Lake Wind Advisory | SHV | 14 hr |
| Jun 9, 11:44 PM CDT | Special Weather Statement | SHV | 61 min |
| Jun 10, 12:53 AM CDT | Special Weather Statement | SHV | 52 min |
| Jun 26, 10:51 AM CDT | Special Weather Statement | SHV | 39 min |
| Jun 27, 5:54 PM CDT | Special Weather Statement | SHV | 51 min |
| Jun 28, 3:22 PM CDT | Special Weather Statement | SHV | 38 min |
| Jun 30, 1:26 PM CDT | Heat Advisory | SHV | 54 hr |
| Jul 4, 8:19 PM CDT | Special Weather Statement | SHV | 41 min |
| Jul 6, 2:32 PM CDT | Areal Flood Advisory | SHV | 3 hr |
| Jul 10, 4:47 AM CDT | Heat Advisory | SHV | 5 days |
| Jul 11, 5:32 AM CDT | Excessive Heat Warning | SHV | 4 days |
| Jul 14, 2:09 PM CDT | Heat Advisory | SHV | 53 hr |
| Jul 31, 12:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 31, 1:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 2:59 PM CDT | Special Weather Statement | SHV | 61 min |
| Aug 13, 1:02 PM CDT | Special Weather Statement | SHV | 43 min |
| Aug 14, 3:02 AM CDT | Heat Advisory | SHV | 64 hr |
| Aug 25, 10:47 AM CDT | Tropical Storm Watch | SHV | 18 hr |
| Aug 25, 2:49 PM CDT | Flash Flood Watch | SHV | 60 hr |
| Aug 25, 9:52 PM CDT | Hurricane Warning | SHV | 39 hr |
| Aug 25, 9:52 PM CDT | Tropical Storm Warning | SHV | 45 hr |
| Aug 27, 6:36 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 27, 7:47 AM CDT | Tornado Watch | SPC | 8 hr |
| Aug 27, 7:52 AM CDT | Flash Flood Warning | SHV | 7 hr |
| Aug 27, 3:02 PM CDT | Heat Advisory | SHV | 52 hr |
| Aug 30, 4:03 AM CDT | Heat Advisory | SHV | 39 hr |
| Sep 1, 2:22 AM CDT | Heat Advisory | SHV | 17 hr |
| Sep 2, 3:05 AM CDT | Heat Advisory | SHV | 16 hr |
| Sep 23, 3:52 AM CDT | Flash Flood Watch | SHV | 17 hr |
| Sep 26, 5:04 AM CDT | Dense Fog Advisory | SHV | 5 hr |
| Sep 28, 1:43 AM CDT | Lake Wind Advisory | SHV | 17 hr |
| Oct 8, 2:27 AM CDT | Flash Flood Watch | SHV | 55 hr |
| Oct 8, 10:28 AM CDT | Tropical Storm Warning | SHV | 45 hr |
| Oct 9, 10:24 AM CDT | Lake Wind Advisory | SHV | 29 hr |
| Oct 10, 2:56 AM CDT | Flash Flood Warning | SHV | 6 hr |
| Oct 20, 7:50 AM CDT | Dense Fog Advisory | SHV | 2 hr |
| Oct 29, 3:03 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| Nov 25, 1:17 AM CST | Mesoscale Discussion | SPC | 118 min |
| Nov 25, 3:10 AM CST | Special Weather Statement | SHV | 65 min |
| Nov 27, 8:15 AM CST | Special Weather Statement | SHV | 30 min |
| Nov 30, 1:47 PM CST | Freeze Warning | SHV | 19 hr |
| Dec 23, 3:07 AM CST | Lake Wind Advisory | SHV | 38 hr |
| Dec 23, 3:27 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 23, 6:28 PM CST | Severe Thunderstorm Warning | SHV | 47 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 | 2 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 19 |
| Flooding | |
| Flash Flood Warning | 8 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 8 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| Lake Wind Advisory | 13 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
| Tropical | |
| Hurricane Warning | 1 |
| Tropical Storm Warning | 2 |
| Tropical Storm Watch | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.