Alert archive / Louisiana / Union Parish
Weather alerts in Union Parish, Louisiana, 2012
140 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Union Parish and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 140
- Warnings
- 34
- Watches
- 25
- Advisories
- 40
- Busiest month
- April32 alerts
- Busiest day
- April 5, 201210 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 Union Parish in 2012 had a tornado report inside them.
Union Parish, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 27 | 18 | 33% | 23 | 83% | 30 min |
| Flash flood warnings | 3 | 3 | 0% | 3 | 100% | 43 min |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Shreveport, LA: tornado warnings | 38 | 18 | 53% | 24 | 79% | 18 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 336 | 232 | 31% | 539 | 85% | 25 min |
| NWS Shreveport, LA: flash flood warnings | 39 | 29 | 26% | 90 | 88% | 135 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, 5:31 AM CST | Flash Flood Watch | SHV | 22 hr |
| Jan 11, 1:53 PM CST | Lake Wind Advisory | SHV | 26 hr |
| Jan 20, 4:43 AM CST | Dense Fog Advisory | SHV | 4 hr |
| Jan 20, 11:24 AM CST | Lake Wind Advisory | SHV | 5 hr |
| Jan 22, 3:57 AM CST | Lake Wind Advisory | SHV | 14 hr |
| Jan 22, 2:26 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 22, 7:59 PM CST | Mesoscale Discussion | SPC | 91 min |
| Jan 25, 7:56 AM CST | Tornado Watch | SPC | 7 hr |
| Jan 25, 11:24 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 25, 2:08 PM CST | Tornado Watch | SPC | 7 hr |
| Feb 1, 10:18 AM CST | Mesoscale Discussion | SPC | 117 min |
| Feb 1, 12:37 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
| Feb 1, 1:22 PM CST | Mesoscale Discussion | SPC | 113 min |
| Feb 1, 2:58 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 1, 3:19 PM CST | Severe Thunderstorm Warning | SHV | 56 min |
| Feb 3, 9:30 PM CST | Flash Flood Watch | SHV | 15 hr |
| Feb 13, 9:44 PM CST | Dense Fog Advisory | SHV | 12 hr |
| Feb 15, 3:14 PM CST | Mesoscale Discussion | SPC | 91 min |
| Feb 16, 4:37 AM CST | Dense Fog Advisory | SHV | 5 hr |
| Feb 17, 3:50 PM CST | Flash Flood Watch | SHV | 24 hr |
| Feb 22, 3:30 PM CST | Lake Wind Advisory | SHV | 30 hr |
| Feb 24, 4:40 AM CST | Lake Wind Advisory | SHV | 11 hr |
| Feb 29, 11:46 AM CST | Mesoscale Discussion | SPC | 89 min |
| Mar 1, 5:03 AM CST | Dense Fog Advisory | SHV | 4 hr |
| Mar 2, 3:12 AM CST | Lake Wind Advisory | SHV | 13 hr |
| Mar 2, 1:19 PM CST | Severe Thunderstorm Warning | SHV | 56 min |
| Mar 2, 1:26 PM CST | Mesoscale Discussion | SPC | 64 min |
| Mar 2, 1:47 PM CST | Severe Thunderstorm Watch | SPC | 9 hr |
| Mar 2, 2:03 PM CST | Severe Thunderstorm Warning | SHV | 42 min |
| Mar 2, 2:54 PM CST | Severe Thunderstorm Warning | SHV | 51 min |
| Mar 2, 3:47 PM CST | Mesoscale Discussion | SPC | 58 min |
| Mar 11, 11:55 AM CDT | Tornado Watch | SPC | 7 hr |
| Mar 11, 5:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Mar 11, 6:53 PM CDT | Areal Flood Advisory | SHV | 3 hr |
| Mar 19, 3:54 AM CDT | Lake Wind Advisory | SHV | 18 hr |
| Mar 19, 4:16 AM CDT | Flash Flood Watch | SHV | 58 hr |
| Mar 19, 3:42 PM CDT | Lake Wind Advisory | SHV | 23 hr |
| Mar 20, 9:03 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Mar 20, 9:46 AM CDT | Tornado Watch | SPC | 7 hr |
| Mar 20, 11:17 AM CDT | River Flood Warning | SHV | 7 days |
| Mar 20, 2:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Mar 20, 10:59 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 21, 1:52 AM CDT | Flash Flood Warning | SHV | 8 hr |
| Mar 21, 9:36 AM CDT | Flash Flood Warning | SHV | 114 min |
| Apr 2, 12:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Apr 2, 12:41 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 2, 2:22 PM CDT | Severe Thunderstorm Warning | SHV | 53 min |
| Apr 2, 3:08 PM CDT | Severe Thunderstorm Warning | SHV | 37 min |
| Apr 2, 3:18 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Apr 3, 2:22 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 3, 3:12 PM CDT | Severe Thunderstorm Warning | SHV | 63 min |
| Apr 3, 4:47 PM CDT | Areal Flood Advisory | SHV | 3 hr |
| Apr 3, 4:59 PM CDT | Severe Thunderstorm Warning | SHV | 41 min |
| Apr 3, 5:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 3, 8:33 PM CDT | Severe Thunderstorm Warning | SHV | 57 min |
| Apr 3, 8:47 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Apr 3, 9:28 PM CDT | Severe Thunderstorm Warning | SHV | 62 min |
| Apr 3, 9:48 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 5, 12:49 AM CDT | Severe Thunderstorm Warning | SHV | 56 min |
| Apr 5, 1:07 AM CDT | Severe Thunderstorm Warning | SHV | 53 min |
| Apr 5, 1:27 AM CDT | Tornado Warning | SHV | 48 min |
| Apr 5, 1:35 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 5, 1:53 AM CDT | Tornado Watch | SPC | 9 hr |
| Apr 5, 3:30 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 5, 4:03 AM CDT | Severe Thunderstorm Warning | SHV | 57 min |
| Apr 5, 5:14 AM CDT | Tornado Warning | SHV | 31 min |
| Apr 5, 5:30 AM CDT | Severe Thunderstorm Warning | SHV | 60 min |
| Apr 5, 7:36 AM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 10, 1:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 13, 3:26 PM CDT | Lake Wind Advisory | SHV | 49 hr |
| Apr 15, 3:58 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| Apr 15, 3:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 21, 2:43 PM CDT | Lake Wind Advisory | SHV | 28 hr |
| Apr 24, 4:00 PM CDT | Lake Wind Advisory | SHV | 27 hr |
| Apr 26, 4:26 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| Apr 26, 3:30 PM CDT | Lake Wind Advisory | SHV | 29 hr |
| May 21, 7:14 PM CDT | Severe Thunderstorm Warning | SHV | 46 min |
| May 23, 3:20 PM CDT | Lake Wind Advisory | SHV | 28 hr |
| Jun 4, 5:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 11, 11:52 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 12, 2:54 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 12, 3:21 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 12, 4:10 AM CDT | Severe Thunderstorm Warning | SHV | 65 min |
| Jun 12, 5:13 AM CDT | Severe Thunderstorm Warning | SHV | 62 min |
| Jun 12, 6:08 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 9:20 PM CDT | Heat Advisory | SHV | 24 hr |
| Jul 7, 9:26 PM CDT | Severe Thunderstorm Warning | SHV | 34 min |
| Jul 11, 2:13 PM CDT | Flash Flood Warning | SHV | 4 hr |
| Jul 12, 7:57 AM CDT | Areal Flood Advisory | SHV | 3 hr |
| Jul 20, 12:47 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 2:53 PM CDT | Heat Advisory | SHV | 30 hr |
| Jul 28, 8:54 PM CDT | Severe Thunderstorm Warning | SHV | 56 min |
| Jul 29, 2:23 AM CDT | Heat Advisory | SHV | 5 days |
| Aug 6, 4:53 PM CDT | Severe Thunderstorm Warning | SHV | 52 min |
| Aug 6, 5:36 PM CDT | Severe Thunderstorm Warning | SHV | 39 min |
| Aug 6, 6:12 PM CDT | Severe Thunderstorm Warning | SHV | 35 min |
| Aug 10, 12:32 AM CDT | Severe Thunderstorm Warning | SHV | 43 min |
| Aug 17, 8:26 AM CDT | Severe Thunderstorm Warning | SHV | 28 min |
| Aug 17, 7:53 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 6:29 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 4:47 AM CDT | Flash Flood Watch | SHV | 64 hr |
| Aug 28, 4:54 AM CDT | Lake Wind Advisory | SHV | 10 hr |
| Aug 29, 5:40 AM CDT | Lake Wind Advisory | SHV | 46 hr |
| Sep 3, 4:10 AM CDT | Heat Advisory | SHV | 15 hr |
| Sep 4, 4:21 AM CDT | Heat Advisory | SHV | 15 hr |
| Sep 5, 3:48 AM CDT | Heat Advisory | SHV | 15 hr |
| Sep 6, 3:56 AM CDT | Heat Advisory | SHV | 15 hr |
| Sep 6, 4:05 PM CDT | Heat Advisory | SHV | 27 hr |
| Sep 29, 4:13 AM CDT | Flash Flood Watch | SHV | 36 hr |
| Sep 30, 3:56 AM CDT | Lake Wind Advisory | SHV | 12 hr |
| Oct 16, 4:13 PM CDT | Lake Wind Advisory | SHV | 27 hr |
| Oct 17, 6:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Oct 17, 7:01 PM CDT | Tornado Watch | SPC | 8 hr |
| Oct 17, 9:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Oct 19, 4:17 AM CDT | Lake Wind Advisory | SHV | 14 hr |
| Nov 11, 3:38 AM CST | Lake Wind Advisory | SHV | 12 hr |
| Nov 11, 12:53 PM CST | Tornado Watch | SPC | 6 hr |
| Nov 11, 6:32 PM CST | Mesoscale Discussion | SPC | 58 min |
| Nov 12, 3:06 PM CST | Freeze Warning | SHV | 17 hr |
| Nov 26, 3:34 PM CST | Mesoscale Discussion | SPC | 86 min |
| Nov 26, 6:44 PM CST | Mesoscale Discussion | SPC | 91 min |
| Nov 26, 10:14 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Dec 4, 11:09 AM CST | Mesoscale Discussion | SPC | 96 min |
| Dec 4, 12:50 PM CST | Severe Thunderstorm Warning | SHV | 40 min |
| Dec 6, 9:11 PM CST | Dense Fog Advisory | SHV | 12 hr |
| Dec 8, 3:40 PM CST | Mesoscale Discussion | SPC | 65 min |
| Dec 9, 5:47 PM CST | Severe Thunderstorm Watch | SPC | 6 hr |
| Dec 9, 8:38 PM CST | Mesoscale Discussion | SPC | 67 min |
| Dec 16, 5:00 AM CST | Mesoscale Discussion | SPC | 90 min |
| Dec 16, 5:48 AM CST | Severe Thunderstorm Watch | SPC | 7 hr |
| Dec 19, 10:14 AM CST | Lake Wind Advisory | SHV | 32 hr |
| Dec 19, 11:55 PM CST | Mesoscale Discussion | SPC | 95 min |
| Dec 20, 12:50 AM CST | Mesoscale Discussion | SPC | 55 min |
| Dec 20, 1:07 AM CST | Severe Thunderstorm Watch | SPC | 5 hr |
| Dec 20, 1:12 AM CST | Severe Thunderstorm Warning | SHV | 63 min |
| Dec 20, 2:04 AM CST | Severe Thunderstorm Warning | SHV | 56 min |
| Dec 20, 10:39 AM CST | Wind Advisory | SHV | 5 hr |
| Dec 25, 1:39 AM CST | Lake Wind Advisory | SHV | 28 hr |
| Dec 25, 9:02 AM CST | Severe Thunderstorm Watch | SPC | 7 hr |
| Dec 25, 12:23 PM CST | Mesoscale Discussion | SPC | 67 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 | 27 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 11 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 41 |
| Flooding | |
| Flash Flood Warning | 3 |
| River Flood Warning | 1 |
| Flash Flood Watch | 6 |
| Areal Flood Advisory | 3 |
| Heat | |
| Heat Advisory | 8 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| Lake Wind Advisory | 23 |
| Wind Advisory | 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 archive20112013
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.