Alert archive / Missouri / Saint Charles County
Weather alerts in Saint Charles County, Missouri, 2011
252 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Saint Charles County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 252
- Warnings
- 118
- Watches
- 39
- Advisories
- 33
- Busiest month
- June72 alerts
- Busiest day
- April 19, 201122 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
6 of 11 tornado warnings covering Saint Charles County in 2011 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 39 minutes after it went out.
Saint Charles County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 11 | 6 | 45% | 2 | 100% | 39 min |
| Severe thunderstorm warnings | 70 | 44 | 37% | 64 | 67% | 21 min |
| Flash flood warnings | 3 | 2 | 33% | 4 | 100% | 139 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS St. Louis, MO: tornado warnings | 135 | 21 | 84% | 56 | 80% | 23 min |
| NWS St. Louis, MO: severe thunderstorm warnings | 511 | 237 | 54% | 1,031 | 66% | 23 min |
| NWS St. Louis, MO: flash flood warnings | 80 | 34 | 57% | 84 | 83% | 150 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 10, 3:27 AM CST | Winter Weather Advisory | LSX | 39 hr |
| Jan 18, 3:33 PM CST | Winter Weather Advisory | LSX | 48 hr |
| Jan 19, 12:50 PM CST | Winter Storm Warning | LSX | 26 hr |
| Jan 19, 7:25 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 22, 4:11 AM CST | Winter Weather Advisory | LSX | 34 hr |
| Jan 23, 10:21 PM CST | Winter Weather Advisory | LSX | 11 hr |
| Jan 29, 8:30 PM CST | Winter Storm Watch | LSX | 19 hr |
| Jan 30, 3:56 PM CST | Winter Storm Warning | LSX | 60 hr |
| Jan 31, 11:52 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 31, 2:08 PM CST | Blizzard Warning | LSX | 46 hr |
| Feb 1, 6:54 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 1, 10:36 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 1, 11:42 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 1, 3:36 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 2, 3:55 AM CST | Wind Chill Advisory | LSX | 30 hr |
| Feb 4, 3:55 PM CST | Winter Weather Advisory | LSX | 19 hr |
| Feb 21, 12:33 PM CST | River Flood Warning | LSX | 5 days |
| Feb 27, 8:25 PM CST | Mesoscale Discussion | SPC | 65 min |
| Feb 27, 9:40 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 27, 10:41 PM CST | Mesoscale Discussion | SPC | 94 min |
| Feb 27, 10:47 PM CST | Tornado Warning | LSX | 43 min |
| Feb 27, 11:18 PM CST | Tornado Warning | LSX | 42 min |
| Feb 28, 2:19 AM CST | River Flood Warning | LSX | 4 days |
| Mar 1, 11:10 AM CST | River Flood Warning | LSX | 48 hr |
| Mar 3, 3:42 PM CST | Flash Flood Watch | LSX | 36 hr |
| Mar 4, 1:33 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 4, 3:22 PM CST | Mesoscale Discussion | SPC | 83 min |
| Mar 4, 4:39 PM CST | Severe Thunderstorm Warning | LSX | 51 min |
| Mar 4, 4:54 PM CST | Tornado Watch | SPC | 118 min |
| Mar 4, 5:23 PM CST | Severe Thunderstorm Warning | LSX | 29 min |
| Mar 4, 6:20 PM CST | Flash Flood Warning | LSX | 5 hr |
| Mar 4, 9:57 PM CST | River Flood Warning | LSX | 21 hr |
| Mar 5, 9:52 PM CST | River Flood Warning | LSX | 18 hr |
| Mar 14, 12:00 AM CDT | Winter Weather Advisory | LSX | 16 hr |
| Mar 23, 12:45 PM CDT | River Flood Warning | LSX | 114 days |
| Mar 25, 3:26 PM CDT | Winter Weather Advisory | LSX | 31 hr |
| Mar 26, 4:05 PM CDT | Freeze Warning | LSX | 17 hr |
| Mar 27, 4:27 AM CDT | Freeze Warning | LSX | 24 hr |
| Apr 2, 4:05 AM CDT | Wind Advisory | LSX | 40 hr |
| Apr 4, 1:29 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 4, 3:55 AM CDT | Severe Thunderstorm Warning | LSX | 35 min |
| Apr 6, 5:34 AM CDT | Red Flag Warning | LSX | 13 hr |
| Apr 9, 4:12 AM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 9, 5:08 AM CDT | Severe Thunderstorm Warning | LSX | 22 min |
| Apr 9, 5:44 AM CDT | Areal Flood Advisory | LSX | 3 hr |
| Apr 10, 6:05 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 10, 10:57 PM CDT | Severe Thunderstorm Warning | LSX | 48 min |
| Apr 15, 12:29 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Apr 15, 12:47 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 15, 2:20 PM CDT | Severe Thunderstorm Warning | LSX | 40 min |
| Apr 15, 2:54 PM CDT | Severe Thunderstorm Warning | LSX | 51 min |
| Apr 15, 3:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Apr 15, 4:03 PM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| Apr 15, 4:43 PM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Apr 17, 11:15 AM CDT | River Flood Warning | LSX | 30 days |
| Apr 18, 11:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 19, 2:53 AM CDT | Mesoscale Discussion | SPC | 67 min |
| Apr 19, 3:11 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 19, 5:23 AM CDT | Severe Thunderstorm Warning | LSX | 37 min |
| Apr 19, 5:43 AM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Apr 19, 5:52 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 19, 6:21 AM CDT | Areal Flood Advisory | LSX | 3 hr |
| Apr 19, 6:26 AM CDT | Severe Thunderstorm Warning | LSX | 49 min |
| Apr 19, 7:08 AM CDT | Severe Thunderstorm Warning | LSX | 37 min |
| Apr 19, 8:05 AM CDT | River Flood Warning | LSX | 30 hr |
| Apr 19, 12:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Apr 19, 1:00 PM CDT | Tornado Watch | SPC | 10 hr |
| Apr 19, 4:41 PM CDT | Severe Thunderstorm Warning | LSX | 49 min |
| Apr 19, 5:01 PM CDT | Severe Thunderstorm Warning | LSX | 44 min |
| Apr 19, 5:13 PM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Apr 19, 5:28 PM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Apr 19, 5:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Apr 19, 5:56 PM CDT | Severe Thunderstorm Warning | LSX | 34 min |
| Apr 19, 6:12 PM CDT | Severe Thunderstorm Warning | LSX | 48 min |
| Apr 19, 6:30 PM CDT | Flash Flood Warning | LSX | 3 hr |
| Apr 19, 6:45 PM CDT | Severe Thunderstorm Warning | LSX | 30 min |
| Apr 19, 6:56 PM CDT | Severe Thunderstorm Warning | LSX | 64 min |
| Apr 19, 9:37 PM CDT | Severe Thunderstorm Warning | LSX | 21 min |
| Apr 21, 3:45 PM CDT | Flash Flood Watch | LSX | 6 days |
| Apr 22, 10:09 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 22, 10:17 AM CDT | Severe Thunderstorm Warning | LSX | 43 min |
| Apr 22, 11:00 AM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| Apr 22, 12:34 PM CDT | River Flood Warning | LSX | 26 hr |
| Apr 22, 1:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 22, 3:34 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 22, 5:21 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Apr 22, 6:55 PM CDT | Tornado Warning | LSX | 50 min |
| Apr 22, 6:58 PM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Apr 22, 7:11 PM CDT | Severe Thunderstorm Warning | LSX | 49 min |
| Apr 22, 7:20 PM CDT | Tornado Warning | LSX | 40 min |
| Apr 22, 7:36 PM CDT | Tornado Warning | LSX | 39 min |
| Apr 22, 9:20 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Apr 24, 9:39 AM CDT | River Flood Warning | LSX | 7 days |
| Apr 24, 10:57 AM CDT | River Flood Warning | LSX | 45 hr |
| Apr 28, 12:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| May 3, 3:36 AM CDT | Frost Advisory | LSX | 28 hr |
| May 10, 12:25 PM CDT | Severe Thunderstorm Warning | LSX | 35 min |
| May 11, 2:07 PM CDT | Severe Thunderstorm Warning | LSX | 38 min |
| May 11, 2:18 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 11, 2:24 PM CDT | Severe Thunderstorm Warning | LSX | 29 min |
| May 13, 4:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 21, 9:26 PM CDT | River Flood Warning | LSX | 55 days |
| May 21, 10:55 PM CDT | River Flood Warning | LSX | 3 days |
| May 22, 12:51 PM CDT | Tornado Watch | SPC | 10 hr |
| May 22, 4:32 PM CDT | Severe Thunderstorm Warning | LSX | 58 min |
| May 22, 5:37 PM CDT | Tornado Warning | LSX | 38 min |
| May 22, 7:45 PM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| May 22, 7:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| May 22, 8:01 PM CDT | Severe Thunderstorm Warning | LSX | 29 min |
| May 22, 8:15 PM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| May 22, 8:26 PM CDT | Tornado Watch | SPC | 8 hr |
| May 23, 12:34 AM CDT | River Flood Warning | LSX | 66 hr |
| May 23, 10:55 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 23, 11:41 AM CDT | Severe Thunderstorm Warning | LSX | 49 min |
| May 23, 12:04 PM CDT | Severe Thunderstorm Warning | LSX | 41 min |
| May 23, 12:34 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| May 24, 1:38 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 24, 3:44 PM CDT | Flash Flood Watch | LSX | 32 hr |
| May 24, 4:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| May 25, 12:48 AM CDT | Mesoscale Discussion | SPC | 57 min |
| May 25, 1:22 AM CDT | Tornado Watch | SPC | 7 hr |
| May 25, 4:15 AM CDT | Severe Thunderstorm Warning | LSX | 35 min |
| May 25, 4:58 AM CDT | Mesoscale Discussion | SPC | 92 min |
| May 25, 11:03 AM CDT | River Flood Warning | LSX | 20 days |
| May 25, 11:09 AM CDT | Tornado Watch | SPC | 10 hr |
| May 25, 2:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| May 25, 3:09 PM CDT | Severe Thunderstorm Warning | LSX | 36 min |
| May 25, 3:16 PM CDT | Tornado Warning | LSX | 44 min |
| May 25, 3:41 PM CDT | Severe Thunderstorm Warning | LSX | 38 min |
| May 25, 4:00 PM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| May 25, 4:05 PM CDT | Severe Thunderstorm Warning | LSX | 40 min |
| May 25, 4:11 PM CDT | Tornado Warning | LSX | 49 min |
| May 25, 4:40 PM CDT | Tornado Warning | LSX | 21 min |
| May 25, 5:00 PM CDT | Severe Thunderstorm Warning | LSX | 25 min |
| May 25, 7:46 PM CDT | River Flood Warning | LSX | 16 hr |
| May 28, 5:39 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 2, 2:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 3:46 PM CDT | Tornado Watch | SPC | 4 hr |
| Jun 2, 6:20 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jun 4, 3:45 AM CDT | Heat Advisory | LSX | 5 days |
| Jun 5, 2:52 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 5, 5:00 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 10, 4:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 10, 4:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 10, 7:47 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 10, 9:33 PM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| Jun 10, 9:51 PM CDT | Severe Thunderstorm Warning | LSX | 39 min |
| Jun 10, 9:58 PM CDT | Severe Thunderstorm Warning | LSX | 35 min |
| Jun 10, 10:07 PM CDT | Severe Thunderstorm Warning | LSX | 39 min |
| Jun 10, 10:30 PM CDT | Severe Thunderstorm Warning | LSX | 23 min |
| Jun 10, 10:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 13, 5:16 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 13, 6:52 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 13, 8:33 AM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| Jun 13, 10:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 13, 4:02 PM CDT | Flash Flood Watch | LSX | 39 hr |
| Jun 13, 11:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 14, 1:50 AM CDT | Severe Thunderstorm Warning | LSX | 16 min |
| Jun 14, 2:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 15, 3:23 AM CDT | Severe Thunderstorm Warning | LSX | 41 min |
| Jun 15, 3:29 AM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| Jun 15, 3:45 AM CDT | Areal Flood Advisory | LSX | 3 hr |
| Jun 15, 4:24 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 17, 11:51 AM CDT | Areal Flood Advisory | LSX | 3 hr |
| Jun 17, 4:44 PM CDT | River Flood Warning | LSX | 3 hr |
| Jun 18, 2:44 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 18, 4:30 AM CDT | Severe Thunderstorm Warning | LSX | 60 min |
| Jun 18, 4:56 AM CDT | Tornado Warning | LSX | 49 min |
| Jun 18, 5:18 AM CDT | Severe Thunderstorm Warning | LSX | 57 min |
| Jun 18, 5:30 AM CDT | Tornado Warning | LSX | 19 min |
| Jun 18, 5:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 18, 5:50 AM CDT | Areal Flood Advisory | LSX | 3 hr |
| Jun 18, 6:09 AM CDT | Severe Thunderstorm Warning | LSX | 51 min |
| Jun 18, 3:57 PM CDT | Flash Flood Watch | LSX | 15 hr |
| Jun 18, 8:26 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 12:52 AM CDT | Severe Thunderstorm Warning | LSX | 53 min |
| Jun 19, 10:10 AM CDT | River Flood Warning | LSX | 11 hr |
| Jun 21, 12:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 21, 1:22 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 21, 3:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 25, 3:51 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 25, 11:17 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 25, 1:06 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 25, 7:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 25, 7:36 PM CDT | Severe Thunderstorm Warning | LSX | 39 min |
| Jun 25, 7:36 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 25, 8:09 PM CDT | Severe Thunderstorm Warning | LSX | 51 min |
| Jun 25, 8:13 PM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Jun 25, 11:11 PM CDT | Severe Thunderstorm Warning | LSX | 49 min |
| Jun 25, 11:42 PM CDT | Areal Flood Advisory | LSX | 6 hr |
| Jun 26, 12:21 AM CDT | Flash Flood Warning | LSX | 6 hr |
| Jun 26, 12:43 AM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Jun 26, 1:43 AM CDT | River Flood Warning | LSX | 13 hr |
| Jun 26, 1:58 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 26, 6:29 AM CDT | Areal Flood Warning | LSX | 12 hr |
| Jun 26, 2:43 PM CDT | Flash Flood Watch | LSX | 31 hr |
| Jun 26, 6:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 26, 6:55 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 26, 10:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 27, 12:58 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 27, 1:27 AM CDT | Severe Thunderstorm Warning | LSX | 63 min |
| Jun 27, 1:32 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 2:04 AM CDT | Severe Thunderstorm Warning | LSX | 41 min |
| Jun 27, 2:17 AM CDT | Severe Thunderstorm Warning | LSX | 43 min |
| Jun 27, 2:42 AM CDT | Severe Thunderstorm Warning | LSX | 48 min |
| Jun 27, 5:38 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 27, 3:11 PM CDT | River Flood Warning | LSX | 44 days |
| Jun 29, 4:09 PM CDT | Heat Advisory | LSX | 4 days |
| Jul 2, 6:17 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 3, 12:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jul 3, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 3, 1:29 PM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| Jul 3, 2:12 PM CDT | Severe Thunderstorm Warning | LSX | 48 min |
| Jul 3, 2:50 PM CDT | Severe Thunderstorm Warning | LSX | 40 min |
| Jul 3, 3:26 PM CDT | Severe Thunderstorm Warning | LSX | 64 min |
| Jul 3, 3:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jul 3, 3:56 PM CDT | Severe Thunderstorm Warning | LSX | 49 min |
| Jul 3, 4:34 PM CDT | Areal Flood Advisory | LSX | 5 hr |
| Jul 3, 5:19 PM CDT | Mesoscale Discussion | SPC | 26 min |
| Jul 7, 5:03 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 5:46 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| Jul 8, 3:17 PM CDT | Heat Advisory | LSX | 4 days |
| Jul 10, 11:54 AM CDT | Excessive Heat Warning | LSX | 55 hr |
| Jul 12, 1:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 1:45 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 12, 3:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 12, 5:03 PM CDT | Severe Thunderstorm Warning | LSX | 57 min |
| Jul 12, 6:43 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jul 14, 3:29 PM CDT | Excessive Heat Watch | LSX | 23 hr |
| Jul 15, 2:23 PM CDT | Excessive Heat Warning | LSX | 19 days |
| Aug 5, 4:10 AM CDT | Heat Advisory | LSX | 63 hr |
| Aug 7, 5:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 7, 5:41 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 12, 1:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 20, 8:55 PM CDT | River Flood Warning | LSX | 7 days |
| Aug 23, 3:35 AM CDT | Heat Advisory | LSX | 39 hr |
| Aug 24, 6:08 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 30, 4:15 PM CDT | Heat Advisory | LSX | 4 days |
| Sep 3, 5:57 PM CDT | Severe Thunderstorm Warning | LSX | 19 min |
| Sep 19, 11:52 PM CDT | Dense Fog Advisory | LSX | 9 hr |
| Sep 22, 11:52 PM CDT | Dense Fog Advisory | LSX | 10 hr |
| Oct 1, 2:25 PM CDT | Frost Advisory | LSX | 18 hr |
| Oct 12, 4:58 AM CDT | Areal Flood Advisory | LSX | 4 hr |
| Oct 20, 3:48 AM CDT | Frost Advisory | LSX | 29 hr |
| Oct 27, 3:55 AM CDT | Frost Advisory | LSX | 28 hr |
| Nov 5, 6:12 AM CDT | Dense Fog Advisory | LSX | 5 hr |
| Nov 8, 1:17 AM CST | Mesoscale Discussion | SPC | 118 min |
| Nov 9, 3:03 PM CST | Freeze Warning | LSX | 15 hr |
| Nov 10, 3:09 PM CST | Freeze Warning | LSX | 17 hr |
| Nov 18, 4:29 AM CST | Red Flag Warning | LSX | 13 hr |
| Dec 19, 9:24 PM CST | River Flood Warning | LSX | 9 hr |
| Dec 20, 10:59 PM CST | Dense Fog Advisory | LSX | 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 | 70 |
| Tornado Warning | 11 |
| Severe Thunderstorm Watch | 18 |
| Tornado Watch | 13 |
| Mesoscale Discussion | 62 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 3 |
| River Flood Warning | 22 |
| Flash Flood Watch | 6 |
| Areal Flood Advisory | 10 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 7 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 4 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 2 |
| 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 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.