Alert archive / Louisiana / Union Parish
Weather alerts in Union Parish, Louisiana, 2017
129 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 129
- Warnings
- 29
- Watches
- 17
- Advisories
- 39
- Busiest month
- April28 alerts
- Busiest day
- January 22, 20178 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
3 of 6 tornado warnings covering Union Parish in 2017 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 1 minutes after it went out.
Union Parish, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 6 | 3 | 50% | 1 | 100% | 1 min |
| Severe thunderstorm warnings | 13 | 8 | 38% | 12 | 42% | 21 min |
| Flash flood warnings | 5 | 2 | 60% | 2 | 50% | 0 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Shreveport, LA: tornado warnings | 91 | 27 | 70% | 65 | 49% | 21 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 254 | 143 | 44% | 473 | 65% | 24 min |
| NWS Shreveport, LA: flash flood warnings | 45 | 30 | 33% | 129 | 84% | 248 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, 3:20 PM CST | Dense Fog Advisory | SHV | 18 hr |
| Jan 2, 6:12 AM CST | Tornado Watch | SPC | 10 hr |
| Jan 2, 7:48 AM CST | Mesoscale Discussion | SPC | 57 min |
| Jan 6, 4:50 AM CST | Hard Freeze Warning | SHV | 28 hr |
| Jan 7, 4:14 AM CST | Hard Freeze Warning | SHV | 29 hr |
| Jan 9, 3:49 PM CST | Lake Wind Advisory | SHV | 26 hr |
| Jan 11, 3:34 AM CST | Lake Wind Advisory | SHV | 14 hr |
| Jan 16, 2:02 PM CST | Mesoscale Discussion | SPC | 118 min |
| Jan 21, 2:33 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 21, 2:51 PM CST | Lake Wind Advisory | SHV | 34 hr |
| Jan 21, 3:41 PM CST | Tornado Watch | SPC | 7 hr |
| Jan 21, 5:32 PM CST | Mesoscale Discussion | SPC | 118 min |
| Jan 21, 6:32 PM CST | Tornado Warning | SHV | 43 min |
| Jan 21, 7:13 PM CST | Tornado Warning | SHV | 47 min |
| Jan 21, 7:21 PM CST | Tornado Warning | SHV | 54 min |
| Jan 21, 7:34 PM CST | Severe Thunderstorm Warning | SHV | 56 min |
| Jan 21, 7:39 PM CST | Tornado Warning | SHV | 51 min |
| Jan 21, 8:21 PM CST | Tornado Warning | SHV | 39 min |
| Jan 21, 8:22 PM CST | Mesoscale Discussion | SPC | 113 min |
| Jan 21, 8:47 PM CST | Tornado Warning | SHV | 43 min |
| Feb 11, 10:36 AM CST | Lake Wind Advisory | SHV | 7 hr |
| Feb 27, 2:11 AM CST | Special Weather Statement | SHV | 49 min |
| Feb 28, 4:36 AM CST | Lake Wind Advisory | SHV | 13 hr |
| Feb 28, 9:51 PM CST | Lake Wind Advisory | SHV | 20 hr |
| Mar 6, 10:16 AM CST | Lake Wind Advisory | SHV | 8 hr |
| Mar 7, 2:58 AM CST | Mesoscale Discussion | SPC | 92 min |
| Mar 7, 3:37 AM CST | Severe Thunderstorm Watch | SPC | 8 hr |
| Mar 7, 8:03 AM CST | Mesoscale Discussion | SPC | 117 min |
| Mar 23, 8:07 PM CDT | Lake Wind Advisory | SHV | 29 hr |
| Mar 24, 9:14 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 28, 3:49 PM CDT | Lake Wind Advisory | SHV | 27 hr |
| Mar 29, 5:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 2, 4:30 AM CDT | Flash Flood Watch | SHV | 23 hr |
| Apr 2, 10:39 AM CDT | Tornado Watch | SPC | 5 hr |
| Apr 2, 1:34 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 2, 3:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 2, 3:20 PM CDT | Severe Thunderstorm Warning | SHV | 55 min |
| Apr 2, 4:14 PM CDT | Severe Thunderstorm Warning | SHV | 29 min |
| Apr 4, 10:00 PM CDT | Lake Wind Advisory | SHV | 21 hr |
| Apr 11, 12:21 AM CDT | Special Weather Statement | SHV | 39 min |
| Apr 21, 9:52 PM CDT | Lake Wind Advisory | SHV | 17 hr |
| Apr 22, 12:41 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 22, 4:16 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 26, 12:27 AM CDT | Lake Wind Advisory | SHV | 21 hr |
| Apr 26, 10:08 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 26, 4:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Apr 26, 4:44 PM CDT | Tornado Watch | SPC | 5 hr |
| Apr 26, 5:18 PM CDT | Severe Thunderstorm Warning | SHV | 21 min |
| Apr 26, 6:02 PM CDT | Severe Thunderstorm Warning | SHV | 20 min |
| Apr 28, 5:02 AM CDT | Lake Wind Advisory | SHV | 47 hr |
| Apr 29, 2:45 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Apr 29, 4:13 PM CDT | Special Weather Statement | SHV | 47 min |
| Apr 29, 5:20 PM CDT | Special Weather Statement | SHV | 40 min |
| Apr 29, 10:23 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 29, 11:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Apr 30, 1:18 AM CDT | Severe Thunderstorm Warning | SHV | 35 min |
| Apr 30, 3:19 AM CDT | Special Weather Statement | SHV | 41 min |
| Apr 30, 3:36 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 30, 4:13 AM CDT | Areal Flood Advisory | SHV | 3 hr |
| Apr 30, 5:41 AM CDT | Mesoscale Discussion | SPC | 64 min |
| May 1, 3:50 AM CDT | Lake Wind Advisory | SHV | 11 hr |
| May 3, 3:54 AM CDT | Lake Wind Advisory | SHV | 39 hr |
| May 3, 5:58 PM CDT | Special Weather Statement | SHV | 47 min |
| May 11, 2:43 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 16, 9:39 PM CDT | Lake Wind Advisory | SHV | 21 hr |
| May 21, 11:17 AM CDT | Special Weather Statement | SHV | 43 min |
| May 21, 12:01 PM CDT | Special Weather Statement | SHV | 44 min |
| May 21, 12:43 PM CDT | Special Weather Statement | SHV | 47 min |
| May 23, 7:53 PM CDT | Special Weather Statement | SHV | 52 min |
| May 24, 2:07 AM CDT | Lake Wind Advisory | SHV | 14 hr |
| May 26, 3:29 AM CDT | Lake Wind Advisory | SHV | 16 hr |
| May 28, 2:53 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 8:08 AM CDT | Special Weather Statement | SHV | 37 min |
| May 28, 5:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 28, 5:19 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 28, 7:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 28, 8:00 PM CDT | Flash Flood Warning | SHV | 3 hr |
| May 30, 6:25 PM CDT | Areal Flood Advisory | SHV | 2 hr |
| Jun 3, 8:38 PM CDT | Flash Flood Warning | SHV | 4 hr |
| Jun 6, 2:06 PM CDT | Areal Flood Advisory | SHV | 3 hr |
| Jun 6, 8:59 PM CDT | Special Weather Statement | SHV | 46 min |
| Jun 12, 7:16 PM CDT | Areal Flood Advisory | SHV | 3 hr |
| Jun 12, 8:10 PM CDT | Areal Flood Advisory | SHV | 3 hr |
| Jun 20, 1:45 PM CDT | Flash Flood Watch | SHV | 64 hr |
| Jun 21, 6:19 AM CDT | Lake Wind Advisory | SHV | 9 hr |
| Jun 21, 3:58 PM CDT | Lake Wind Advisory | SHV | 30 hr |
| Jun 23, 7:52 AM CDT | Areal Flood Warning | SHV | 3 hr |
| Jun 23, 8:16 AM CDT | Severe Thunderstorm Warning | SHV | 59 min |
| Jun 23, 9:13 AM CDT | Special Weather Statement | SHV | 47 min |
| Jun 23, 10:23 AM CDT | Flash Flood Warning | SHV | 3 hr |
| Jun 23, 10:28 AM CDT | Special Weather Statement | SHV | 47 min |
| Jun 23, 10:53 AM CDT | Severe Thunderstorm Warning | SHV | 67 min |
| Jun 23, 7:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 9:22 PM CDT | Areal Flood Advisory | SHV | 113 min |
| Jul 1, 4:03 AM CDT | Special Weather Statement | SHV | 57 min |
| Jul 1, 5:03 AM CDT | Special Weather Statement | SHV | 57 min |
| Jul 1, 11:33 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 1, 3:50 PM CDT | Special Weather Statement | SHV | 40 min |
| Jul 1, 4:11 PM CDT | Severe Thunderstorm Warning | SHV | 64 min |
| Jul 1, 4:41 PM CDT | Flash Flood Warning | SHV | 3 hr |
| Jul 1, 5:02 PM CDT | Flash Flood Warning | SHV | 3 hr |
| Jul 1, 5:12 PM CDT | Severe Thunderstorm Warning | SHV | 18 min |
| Jul 8, 9:03 AM CDT | Special Weather Statement | SHV | 42 min |
| Jul 14, 4:08 PM CDT | Severe Thunderstorm Warning | SHV | 67 min |
| Jul 19, 2:40 AM CDT | Heat Advisory | SHV | 4 days |
| Jul 22, 4:30 AM CDT | Heat Advisory | SHV | 15 hr |
| Jul 25, 3:25 PM CDT | Heat Advisory | SHV | 52 hr |
| Jul 28, 3:49 AM CDT | Heat Advisory | SHV | 15 hr |
| Aug 10, 3:28 AM CDT | Flash Flood Watch | SHV | 7 hr |
| Aug 19, 2:42 AM CDT | Heat Advisory | SHV | 40 hr |
| Aug 27, 4:00 AM CDT | Flash Flood Watch | SHV | 4 days |
| Aug 29, 10:06 PM CDT | Lake Wind Advisory | SHV | 27 hr |
| Sep 5, 3:10 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Sep 5, 5:22 PM CDT | Severe Thunderstorm Warning | SHV | 28 min |
| Sep 5, 5:46 PM CDT | Severe Thunderstorm Warning | SHV | 29 min |
| Sep 5, 6:10 PM CDT | Special Weather Statement | SHV | 50 min |
| Oct 22, 4:52 AM CDT | Special Weather Statement | SHV | 38 min |
| Oct 22, 4:57 AM CDT | Mesoscale Discussion | SPC | 93 min |
| Oct 22, 5:29 AM CDT | Special Weather Statement | SHV | 61 min |
| Oct 23, 2:29 PM CDT | Lake Wind Advisory | SHV | 29 hr |
| Oct 26, 9:23 PM CDT | Lake Wind Advisory | SHV | 18 hr |
| Oct 28, 3:45 AM CDT | Freeze Warning | SHV | 29 hr |
| Nov 17, 3:23 AM CST | Lake Wind Advisory | SHV | 42 hr |
| Dec 7, 3:03 AM CST | Freeze Warning | SHV | 30 hr |
| Dec 17, 9:53 PM CST | Dense Fog Advisory | SHV | 12 hr |
| Dec 19, 3:28 AM CST | Dense Fog Advisory | SHV | 6 hr |
| Dec 20, 12:24 AM CST | Special Weather Statement | SHV | 66 min |
| Dec 21, 4:01 AM CST | Dense Fog Advisory | SHV | 5 hr |
| Dec 21, 3:24 PM CST | Flash Flood Watch | SHV | 30 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 | 13 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 22 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 5 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 6 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 2 |
| Hard Freeze Warning | 2 |
| Wind and dust | |
| Lake Wind Advisory | 24 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
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.