Alert archive / Louisiana / Assumption Parish
Weather alerts in Assumption Parish, Louisiana, 2011
133 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Assumption Parish and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 133
- Warnings
- 29
- Watches
- 24
- Advisories
- 41
- Busiest month
- March24 alerts
- Busiest day
- March 30, 20116 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 3 tornado warnings covering Assumption Parish in 2011 had a tornado report inside them.
Assumption Parish, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 0 | ||
| Severe thunderstorm warnings | 11 | 5 | 55% | 1 | 0% | |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS New Orleans, LA: tornado warnings | 170 | 18 | 89% | 51 | 61% | 17 min |
| NWS New Orleans, LA: severe thunderstorm warnings | 214 | 77 | 64% | 301 | 62% | 25 min |
| NWS New Orleans, LA: flash flood warnings | 35 | 12 | 66% | 32 | 59% | 34 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 8, 3:44 PM CST | Wind Advisory | LIX | 30 hr |
| Jan 11, 3:48 AM CST | Hard Freeze Warning | LIX | 29 hr |
| Jan 12, 3:41 AM CST | Hard Freeze Warning | LIX | 29 hr |
| Jan 13, 3:52 AM CST | Hard Freeze Warning | LIX | 29 hr |
| Jan 18, 4:25 AM CST | Dense Fog Advisory | LIX | 5 hr |
| Jan 18, 3:33 PM CST | Mesoscale Discussion | SPC | 87 min |
| Jan 21, 3:44 AM CST | Freeze Warning | LIX | 28 hr |
| Jan 22, 4:53 PM CST | Freeze Warning | LIX | 15 hr |
| Jan 31, 1:17 AM CST | Dense Fog Advisory | LIX | 8 hr |
| Feb 1, 5:05 AM CST | Wind Advisory | LIX | 25 hr |
| Feb 1, 8:40 AM CST | Tornado Watch | SPC | 6 hr |
| Feb 1, 12:00 PM CST | Mesoscale Discussion | SPC | 60 min |
| Feb 1, 1:23 PM CST | Mesoscale Discussion | SPC | 67 min |
| Feb 2, 4:49 PM CST | Winter Weather Advisory | LIX | 17 hr |
| Feb 3, 9:39 AM CST | Freezing Rain Advisory | LIX | 15 hr |
| Feb 7, 3:37 PM CST | Freeze Watch | LIX | 6 hr |
| Feb 7, 9:18 PM CST | Freeze Warning | LIX | 12 hr |
| Feb 9, 3:19 PM CST | Freeze Watch | LIX | 14 hr |
| Feb 10, 4:53 AM CST | Freeze Warning | LIX | 28 hr |
| Feb 11, 3:30 AM CST | Freeze Warning | LIX | 30 hr |
| Feb 17, 8:29 AM CST | Dense Fog Advisory | LIX | 60 min |
| Feb 17, 11:47 PM CST | Dense Fog Advisory | LIX | 9 hr |
| Feb 18, 2:42 PM CST | Dense Fog Advisory | LIX | 18 hr |
| Feb 19, 11:25 AM CST | Dense Fog Advisory | LIX | 22 hr |
| Feb 22, 3:40 AM CST | Dense Fog Advisory | LIX | 6 hr |
| Feb 23, 2:47 AM CST | Dense Fog Advisory | LIX | 9 hr |
| Mar 5, 8:40 AM CST | Mesoscale Discussion | SPC | 65 min |
| Mar 5, 8:54 AM CST | Tornado Watch | SPC | 7 hr |
| Mar 5, 11:12 AM CST | Mesoscale Discussion | SPC | 93 min |
| Mar 5, 11:41 AM CST | Severe Thunderstorm Warning | LIX | 34 min |
| Mar 5, 12:22 PM CST | Tornado Warning | LIX | 23 min |
| Mar 7, 3:52 PM CST | Flash Flood Watch | LIX | 50 hr |
| Mar 8, 9:52 AM CST | Mesoscale Discussion | SPC | 53 min |
| Mar 8, 12:54 PM CST | Mesoscale Discussion | SPC | 36 min |
| Mar 8, 7:37 PM CST | Tornado Watch | SPC | 7 hr |
| Mar 9, 1:28 AM CST | Mesoscale Discussion | SPC | 92 min |
| Mar 9, 2:39 AM CST | Tornado Watch | SPC | 5 hr |
| Mar 9, 4:39 AM CST | Mesoscale Discussion | SPC | 66 min |
| Mar 9, 6:28 AM CST | Mesoscale Discussion | SPC | 92 min |
| Mar 19, 9:20 PM CDT | Dense Fog Advisory | LIX | 12 hr |
| Mar 20, 10:12 PM CDT | Dense Fog Advisory | LIX | 6 hr |
| Mar 29, 2:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Mar 29, 3:17 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 29, 6:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Mar 29, 8:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Mar 29, 9:42 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 29, 10:22 PM CDT | Flood Watch | LIX | 9 hr |
| Mar 29, 11:18 PM CDT | Severe Thunderstorm Warning | LIX | 57 min |
| Mar 30, 4:55 AM CDT | Special Weather Statement | LCH | 50 min |
| Mar 30, 5:08 AM CDT | Severe Thunderstorm Warning | LIX | 32 min |
| Apr 3, 3:23 PM CDT | Wind Advisory | LIX | 40 hr |
| Apr 4, 10:53 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 4, 5:28 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 4, 6:34 PM CDT | Severe Thunderstorm Warning | LIX | 41 min |
| Apr 4, 6:47 PM CDT | Tornado Warning | LIX | 28 min |
| Apr 4, 6:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 15, 2:41 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 15, 3:52 PM CDT | Wind Advisory | LIX | 6 hr |
| Apr 15, 6:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 15, 7:51 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 26, 9:50 AM CDT | Wind Advisory | LIX | 3 hr |
| Apr 26, 2:55 PM CDT | Wind Advisory | LIX | 40 hr |
| Jun 2, 5:58 PM CDT | Heat Advisory | LIX | 22 hr |
| Jun 4, 4:49 AM CDT | Heat Advisory | LIX | 13 hr |
| Jun 4, 4:12 PM CDT | Severe Thunderstorm Warning | LIX | 63 min |
| Jun 4, 6:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 5, 11:01 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 6, 2:53 PM CDT | Severe Thunderstorm Warning | LIX | 67 min |
| Jun 6, 3:01 PM CDT | Severe Thunderstorm Warning | LIX | 59 min |
| Jun 6, 3:45 PM CDT | Severe Thunderstorm Warning | LIX | 60 min |
| Jun 6, 5:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 11, 5:27 PM CDT | Special Weather Statement | LCH | 33 min |
| Jun 17, 1:15 PM CDT | Heat Advisory | LIX | 28 hr |
| Jun 30, 2:28 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 1, 6:25 PM CDT | Special Weather Statement | LCH | 50 min |
| Jul 3, 4:18 PM CDT | Severe Thunderstorm Warning | LIX | 27 min |
| Jul 18, 9:16 AM CDT | Flash Flood Warning | LIX | 3 hr |
| Jul 26, 4:05 AM CDT | Flash Flood Watch | LIX | 15 hr |
| Jul 31, 10:40 AM CDT | Heat Advisory | LIX | 65 hr |
| Jul 31, 6:17 PM CDT | Areal Flood Advisory | LIX | 118 min |
| Aug 1, 1:51 PM CDT | Areal Flood Advisory | LIX | 54 min |
| Aug 3, 4:05 AM CDT | Excessive Heat Warning | LIX | 63 hr |
| Aug 5, 3:41 AM CDT | Excessive Heat Watch | LIX | 11 hr |
| Aug 5, 2:21 PM CDT | Heat Advisory | LIX | 29 hr |
| Aug 8, 4:52 PM CDT | Excessive Heat Watch | LIX | 35 hr |
| Aug 9, 4:54 PM CDT | Heat Advisory | LIX | 3 days |
| Aug 14, 1:14 PM CDT | Heat Advisory | LIX | 4 hr |
| Aug 18, 1:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 18, 3:43 PM CDT | Heat Advisory | LIX | 27 hr |
| Aug 22, 3:45 PM CDT | Heat Advisory | LIX | 51 hr |
| Aug 24, 6:57 PM CDT | Heat Advisory | LIX | 48 hr |
| Sep 1, 4:03 AM CDT | Flash Flood Watch | LIX | 4 days |
| Sep 1, 7:00 PM CDT | Tropical Storm Warning | NHC | 3 days |
| Sep 1, 7:02 PM CDT | Tropical Storm Warning | LIX | 3 days |
| Sep 2, 11:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Sep 3, 1:19 AM CDT | Tornado Warning | LIX | 26 min |
| Sep 3, 1:43 AM CDT | Tornado Watch | SPC | 8 hr |
| Sep 3, 9:41 AM CDT | Tornado Watch | SPC | 12 hr |
| Sep 3, 1:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Sep 3, 5:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 3, 9:43 PM CDT | Tornado Watch | SPC | 9 hr |
| Sep 3, 11:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Sep 4, 5:05 AM CDT | Tornado Watch | SPC | 11 hr |
| Sep 4, 8:05 AM CDT | Flash Flood Warning | LIX | 4 hr |
| Sep 4, 9:50 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Sep 4, 2:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 4, 10:43 PM CDT | Wind Advisory | LIX | 25 hr |
| Sep 28, 12:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 28, 1:59 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 28, 5:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Sep 28, 9:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Nov 15, 8:59 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Nov 16, 2:49 AM CST | Tornado Watch | SPC | 7 hr |
| Nov 20, 12:06 AM CST | Dense Fog Advisory | LIX | 9 hr |
| Nov 20, 3:45 PM CST | Dense Fog Advisory | LIX | 17 hr |
| Nov 21, 3:50 PM CST | Dense Fog Advisory | LIX | 10 hr |
| Nov 22, 10:26 AM CST | Mesoscale Discussion | SPC | 94 min |
| Nov 26, 6:04 PM CST | Mesoscale Discussion | SPC | 56 min |
| Nov 28, 10:53 PM CST | Freeze Warning | LIX | 9 hr |
| Dec 7, 2:56 PM CST | Freeze Warning | LIX | 17 hr |
| Dec 12, 10:26 PM CST | Dense Fog Advisory | LIX | 5 hr |
| Dec 16, 4:58 AM CST | Dense Fog Advisory | LIX | 4 hr |
| Dec 20, 11:25 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 20, 8:57 PM CST | Dense Fog Advisory | LIX | 13 hr |
| Dec 21, 3:35 PM CST | Dense Fog Advisory | LIX | 13 hr |
| Dec 22, 4:11 AM CST | Mesoscale Discussion | SPC | 34 min |
| Dec 22, 4:36 AM CST | Tornado Watch | SPC | 7 hr |
| Dec 22, 7:38 AM CST | Severe Thunderstorm Warning | LIX | 52 min |
| Dec 22, 7:50 AM CST | Mesoscale Discussion | SPC | 55 min |
| Dec 22, 8:57 AM CST | Severe Thunderstorm Warning | LIX | 63 min |
| Dec 30, 3:01 AM CST | Dense Fog Advisory | LIX | 6 hr |
| Dec 30, 9:37 PM CST | Dense Fog Advisory | LIX | 13 hr |
| Dec 31, 2:19 PM CST | Dense Fog Advisory | LIX | 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 | 11 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 15 |
| Mesoscale Discussion | 36 |
| Special Weather Statement | 3 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 3 |
| Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 1 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 2 |
| Heat Advisory | 10 |
| Cold | |
| Freeze Warning | 7 |
| Hard Freeze Warning | 3 |
| Freeze Watch | 2 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 20 |
| Tropical | |
| Tropical Storm Warning | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.