Alert archive / Louisiana / Webster Parish
Weather alerts in Webster Parish, Louisiana, 2012
133 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Webster Parish and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 133
- Warnings
- 31
- Watches
- 20
- Advisories
- 50
- Busiest month
- April25 alerts
- Busiest day
- April 4, 20127 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Webster Parish, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 23 | 19 | 17% | 12 | 83% | 27 min |
| Flash flood warnings | 2 | 2 | 0% | 1 | 100% | 130 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 15, 3:00 PM CST | Lake Wind Advisory | SHV | 28 hr |
| Jan 16, 9:53 PM CST | Lake Wind Advisory | SHV | 18 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, 9:41 AM CST | Flash Flood Watch | SHV | 11 hr |
| Jan 25, 11:24 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 1, 6:23 AM CST | Dense Fog Advisory | SHV | 4 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, 3:36 PM CST | Severe Thunderstorm Warning | SHV | 24 min |
| Feb 13, 9:44 PM CST | Dense Fog Advisory | SHV | 12 hr |
| Feb 15, 1:52 PM CST | Severe Thunderstorm Warning | SHV | 38 min |
| Feb 15, 2:28 PM CST | Severe Thunderstorm Warning | SHV | 41 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 2, 3:12 AM CST | Lake Wind Advisory | SHV | 13 hr |
| Mar 6, 3:52 AM CST | Lake Wind Advisory | SHV | 14 hr |
| Mar 7, 3:51 AM CST | Lake Wind Advisory | SHV | 14 hr |
| Mar 8, 2:28 PM CST | Mesoscale Discussion | SPC | 62 min |
| Mar 11, 11:55 AM CDT | Tornado Watch | SPC | 7 hr |
| Mar 11, 2:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Mar 12, 6:56 AM CDT | River Flood Warning | SHV | 20 days |
| 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, 11:06 AM CDT | River Flood Warning | SHV | 32 days |
| Mar 20, 11:16 AM CDT | River Flood Warning | SHV | 12 days |
| Mar 20, 9:02 PM CDT | River Flood Warning | SHV | 11 days |
| Mar 20, 10:50 PM CDT | Flash Flood Warning | SHV | 10 hr |
| Apr 2, 12:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Apr 2, 12:30 PM CDT | Severe Thunderstorm Warning | SHV | 60 min |
| Apr 2, 12:41 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 2, 1:30 PM CDT | Severe Thunderstorm Warning | SHV | 45 min |
| Apr 2, 1:52 PM CDT | Severe Thunderstorm Warning | SHV | 38 min |
| Apr 2, 2:13 PM CDT | Severe Thunderstorm Warning | SHV | 62 min |
| Apr 3, 2:22 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 3, 5:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 3, 6:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Apr 3, 7:25 PM CDT | Severe Thunderstorm Warning | SHV | 65 min |
| Apr 3, 7:33 PM CDT | Severe Thunderstorm Warning | SHV | 57 min |
| Apr 3, 8:12 PM CDT | Severe Thunderstorm Warning | SHV | 63 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, 9:12 PM CDT | Severe Thunderstorm Warning | SHV | 63 min |
| Apr 4, 9:07 AM CDT | River Flood Warning | SHV | 9 days |
| Apr 4, 8:31 PM CDT | Mesoscale Discussion | SPC | 119 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 7, 4:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 7, 7:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| May 7, 7:39 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 7, 7:49 PM CDT | Severe Thunderstorm Warning | SHV | 56 min |
| May 7, 8:31 PM CDT | Severe Thunderstorm Warning | SHV | 44 min |
| May 7, 9:15 PM CDT | Mesoscale Discussion | SPC | 60 min |
| May 23, 3:20 PM CDT | Lake Wind Advisory | SHV | 28 hr |
| 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, 3:19 AM CDT | Severe Thunderstorm Warning | SHV | 56 min |
| Jun 12, 3:21 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 12, 4:32 AM CDT | Severe Thunderstorm Warning | SHV | 58 min |
| Jun 25, 9:20 PM CDT | Heat Advisory | SHV | 24 hr |
| Jul 5, 5:34 PM CDT | Severe Thunderstorm Warning | SHV | 41 min |
| Jul 11, 11:29 AM CDT | Areal Flood Advisory | SHV | 2 hr |
| Jul 11, 2:13 PM CDT | Flash Flood Warning | SHV | 4 hr |
| Jul 12, 5:49 AM CDT | Areal Flood Advisory | SHV | 3 hr |
| Jul 20, 2:53 PM CDT | Heat Advisory | SHV | 30 hr |
| Jul 21, 6:14 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 29, 2:23 AM CDT | Heat Advisory | SHV | 5 days |
| Aug 5, 6:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 6, 3:06 PM CDT | Severe Thunderstorm Warning | SHV | 54 min |
| Aug 6, 3:35 PM CDT | Severe Thunderstorm Warning | SHV | 55 min |
| Aug 8, 6:08 PM CDT | Severe Thunderstorm Warning | SHV | 52 min |
| Aug 17, 6:45 AM CDT | Areal Flood Advisory | SHV | 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 1, 4:02 AM CDT | Heat Advisory | SHV | 15 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 7, 8:36 PM CDT | Lake Wind Advisory | SHV | 9 hr |
| Sep 29, 4:42 PM CDT | Areal Flood Advisory | SHV | 2 hr |
| Sep 30, 3:56 AM CDT | Lake Wind Advisory | SHV | 12 hr |
| Oct 14, 6:21 AM CDT | Areal Flood Advisory | SHV | 114 min |
| 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, 5:14 PM CST | Severe Thunderstorm Warning | SHV | 61 min |
| Nov 11, 6:32 PM CST | Mesoscale Discussion | SPC | 58 min |
| Nov 12, 3:06 PM CST | Freeze Warning | SHV | 17 hr |
| Nov 22, 10:21 PM CST | Lake Wind Advisory | SHV | 18 hr |
| Nov 26, 3:34 PM CST | Mesoscale Discussion | SPC | 86 min |
| Nov 26, 6:44 PM CST | Mesoscale Discussion | SPC | 91 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, 5:04 PM CST | Mesoscale Discussion | SPC | 116 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 9, 11:53 PM CST | Lake Wind Advisory | SHV | 11 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, 12:22 AM CST | Severe Thunderstorm Warning | SHV | 53 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, 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 |
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 | 23 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 32 |
| Flooding | |
| Flash Flood Warning | 2 |
| River Flood Warning | 5 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 5 |
| Heat | |
| Heat Advisory | 9 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| Lake Wind Advisory | 30 |
| 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.