Alert archive / Missouri / Saint Charles County
Weather alerts in Saint Charles County, Missouri, 2013
149 weather alerts in 2013, 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 2013. Tap one for its archive.
- Alerts
- 149
- Warnings
- 65
- Watches
- 20
- Advisories
- 21
- Busiest month
- April35 alerts
- Busiest day
- May 21, 201310 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
5 of 6 tornado warnings covering Saint Charles County in 2013 had a tornado report inside them; 6 of 6 tornado reports fell inside a warning, on average 12 minutes after it went out.
Saint Charles County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 6 | 5 | 17% | 6 | 100% | 12 min |
| Severe thunderstorm warnings | 28 | 18 | 36% | 39 | 95% | 20 min |
| Flash flood warnings | 6 | 2 | 67% | 3 | 100% | 84 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS St. Louis, MO: tornado warnings | 43 | 13 | 70% | 40 | 88% | 18 min |
| NWS St. Louis, MO: severe thunderstorm warnings | 157 | 76 | 52% | 318 | 72% | 21 min |
| NWS St. Louis, MO: flash flood warnings | 48 | 18 | 63% | 64 | 84% | 111 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 12, 4:14 AM CST | Winter Weather Advisory | LSX | 24 hr |
| Jan 12, 6:17 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 12, 10:18 PM CST | Areal Flood Advisory | LSX | 175 days |
| Jan 29, 10:38 AM CST | River Flood Warning | LSX | 52 hr |
| Jan 29, 11:54 AM CST | Mesoscale Discussion | SPC | 96 min |
| Jan 29, 12:35 PM CST | Tornado Watch | SPC | 7 hr |
| Jan 29, 3:12 PM CST | Tornado Warning | LSX | 33 min |
| Jan 29, 3:30 PM CST | Tornado Warning | LSX | 30 min |
| Jan 29, 3:31 PM CST | Mesoscale Discussion | SPC | 89 min |
| Jan 29, 9:44 PM CST | Areal Flood Advisory | LSX | 12 hr |
| Feb 19, 3:47 AM CST | Winter Storm Watch | LSX | 25 hr |
| Feb 20, 4:42 AM CST | Winter Storm Warning | LSX | 47 hr |
| Feb 21, 11:19 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 21, 12:46 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 25, 11:49 AM CST | River Flood Warning | LSX | 58 hr |
| Feb 26, 2:22 AM CST | Areal Flood Advisory | LSX | 10 hr |
| Feb 26, 2:22 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Mar 10, 12:43 PM CDT | Areal Flood Advisory | LSX | 6 hr |
| Mar 10, 5:46 PM CDT | River Flood Warning | LSX | 27 hr |
| Mar 11, 12:25 PM CDT | River Flood Warning | LSX | 8 days |
| Mar 12, 12:42 PM CDT | River Flood Warning | LSX | 8 days |
| Mar 16, 4:02 PM CDT | Winter Weather Advisory | LSX | 20 hr |
| Mar 18, 2:11 AM CDT | River Flood Warning | LSX | 24 hr |
| Mar 22, 4:11 AM CDT | Winter Storm Watch | LSX | 34 hr |
| Mar 23, 4:17 AM CDT | Winter Storm Warning | LSX | 44 hr |
| Mar 24, 7:29 AM CDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 24, 11:52 AM CDT | Mesoscale Discussion | SPC | 5 hr |
| Apr 10, 1:46 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 10, 2:43 PM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Apr 10, 3:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Apr 10, 3:16 PM CDT | Severe Thunderstorm Warning | LSX | 44 min |
| Apr 10, 3:45 PM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| Apr 10, 6:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 10, 6:46 PM CDT | Severe Thunderstorm Warning | LSX | 44 min |
| Apr 10, 7:11 PM CDT | Severe Thunderstorm Warning | LSX | 49 min |
| Apr 10, 7:25 PM CDT | Severe Thunderstorm Warning | LSX | 50 min |
| Apr 10, 7:32 PM CDT | Tornado Warning | LSX | 28 min |
| Apr 10, 7:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Apr 10, 8:04 PM CDT | Tornado Warning | LSX | 26 min |
| Apr 10, 8:07 PM CDT | Severe Thunderstorm Warning | LSX | 53 min |
| Apr 11, 4:39 AM CDT | River Flood Warning | LSX | 32 hr |
| Apr 11, 11:57 AM CDT | River Flood Warning | LSX | 96 days |
| Apr 14, 3:28 AM CDT | Wind Advisory | LSX | 16 hr |
| Apr 15, 8:59 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Apr 15, 10:13 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 15, 11:29 PM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| Apr 15, 11:59 PM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| Apr 16, 1:08 AM CDT | Mesoscale Discussion | SPC | 67 min |
| Apr 16, 2:42 PM CDT | River Flood Warning | LSX | 36 hr |
| Apr 16, 4:30 PM CDT | Flash Flood Watch | LSX | 50 hr |
| Apr 17, 10:46 AM CDT | River Flood Warning | LSX | 8 days |
| Apr 17, 11:11 AM CDT | Tornado Watch | SPC | 11 hr |
| Apr 17, 11:48 AM CDT | River Flood Warning | LSX | 32 days |
| Apr 17, 3:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 17, 6:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Apr 17, 8:53 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 18, 2:01 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 18, 4:02 AM CDT | Mesoscale Discussion | SPC | 58 min |
| Apr 18, 5:42 AM CDT | Tornado Watch | SPC | 8 hr |
| Apr 18, 8:36 AM CDT | River Flood Warning | LSX | 55 hr |
| Apr 19, 4:27 AM CDT | Frost Advisory | LSX | 28 hr |
| Apr 20, 8:39 AM CDT | River Flood Warning | LSX | 9 days |
| May 2, 4:04 PM CDT | Flood Watch | LSX | 32 hr |
| May 3, 8:16 AM CDT | River Flood Warning | LSX | 43 hr |
| May 20, 3:05 AM CDT | Severe Thunderstorm Warning | LSX | 40 min |
| May 20, 3:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| May 20, 5:07 PM CDT | Mesoscale Discussion | SPC | 23 min |
| May 20, 5:24 PM CDT | Tornado Watch | SPC | 7 hr |
| May 20, 7:29 PM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| May 20, 8:10 PM CDT | Severe Thunderstorm Warning | LSX | 50 min |
| May 20, 8:41 PM CDT | Areal Flood Advisory | LSX | 6 hr |
| May 20, 8:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 20, 9:21 PM CDT | Flash Flood Warning | LSX | 6 hr |
| May 20, 9:36 PM CDT | Severe Thunderstorm Warning | LSX | 39 min |
| May 20, 9:39 PM CDT | Flash Flood Warning | LSX | 6 hr |
| May 20, 10:10 PM CDT | Severe Thunderstorm Warning | LSX | 35 min |
| May 20, 11:20 PM CDT | River Flood Warning | LSX | 47 hr |
| May 20, 11:29 PM CDT | River Flood Warning | LSX | 3 days |
| May 26, 6:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 27, 2:39 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 27, 10:29 PM CDT | River Flood Warning | LSX | 26 days |
| May 28, 3:30 AM CDT | Mesoscale Discussion | SPC | 90 min |
| May 30, 4:03 AM CDT | Flash Flood Watch | LSX | 51 hr |
| May 30, 10:02 AM CDT | River Flood Warning | LSX | 9 days |
| May 30, 11:29 AM CDT | Mesoscale Discussion | SPC | 61 min |
| May 30, 12:32 PM CDT | Tornado Watch | SPC | 7 hr |
| May 30, 2:16 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 30, 3:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 30, 6:38 PM CDT | Severe Thunderstorm Warning | LSX | 37 min |
| May 31, 8:45 AM CDT | Mesoscale Discussion | SPC | 90 min |
| May 31, 9:32 AM CDT | Severe Thunderstorm Warning | LSX | 43 min |
| May 31, 5:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| May 31, 5:45 PM CDT | Tornado Watch | SPC | 4 hr |
| May 31, 6:47 PM CDT | Severe Thunderstorm Warning | LSX | 43 min |
| May 31, 6:56 PM CDT | Severe Thunderstorm Warning | LSX | 34 min |
| May 31, 7:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 31, 7:30 PM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| May 31, 7:48 PM CDT | Tornado Warning | LSX | 27 min |
| May 31, 8:08 PM CDT | Tornado Warning | LSX | 37 min |
| May 31, 8:12 PM CDT | Severe Thunderstorm Warning | LSX | 48 min |
| May 31, 8:43 PM CDT | Flash Flood Warning | LSX | 6 hr |
| May 31, 8:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 31, 10:43 PM CDT | River Flood Warning | LSX | 38 hr |
| Jun 1, 2:29 AM CDT | Areal Flood Warning | LSX | 7 hr |
| Jun 3, 8:33 PM CDT | Flash Flood Warning | LSX | 18 hr |
| Jun 4, 2:07 PM CDT | Flash Flood Warning | LSX | 24 hr |
| Jun 5, 2:00 PM CDT | Flash Flood Watch | LSX | 4 days |
| Jun 9, 1:28 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 15, 3:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 7:27 PM CDT | Flash Flood Watch | LSX | 9 hr |
| Jun 15, 8:18 PM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| Jun 16, 8:19 PM CDT | Severe Thunderstorm Warning | LSX | 41 min |
| Jun 16, 10:10 PM CDT | Severe Thunderstorm Warning | LSX | 50 min |
| Jun 17, 5:23 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| Jun 23, 2:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 23, 5:28 PM CDT | Flash Flood Warning | LSX | 6 hr |
| Jun 23, 6:06 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| Jun 25, 12:43 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 26, 1:43 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 26, 2:09 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 26, 5:46 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 26, 3:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 26, 4:01 PM CDT | Severe Thunderstorm Warning | LSX | 29 min |
| Jun 26, 9:57 PM CDT | River Flood Warning | LSX | 7 days |
| Jul 10, 3:59 AM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| Aug 9, 9:25 PM CDT | River Flood Warning | LSX | 62 hr |
| Aug 27, 3:30 AM CDT | Heat Advisory | LSX | 5 days |
| Aug 31, 7:14 PM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| Aug 31, 7:46 PM CDT | Severe Thunderstorm Warning | LSX | 44 min |
| Sep 1, 2:01 PM CDT | Severe Thunderstorm Warning | LSX | 44 min |
| Oct 2, 5:07 AM CDT | Dense Fog Advisory | LSX | 4 hr |
| Oct 3, 5:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Oct 22, 3:11 PM CDT | Freeze Watch | LSX | 24 hr |
| Oct 23, 3:26 PM CDT | Freeze Warning | LSX | 42 hr |
| Oct 30, 5:11 AM CDT | Dense Fog Advisory | LSX | 4 hr |
| Oct 30, 1:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Oct 31, 12:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Nov 16, 3:56 PM CST | Wind Advisory | LSX | 26 hr |
| Nov 17, 7:47 AM CST | Mesoscale Discussion | SPC | 88 min |
| Nov 17, 8:40 AM CST | Tornado Watch | SPC | 7 hr |
| Nov 17, 10:49 AM CST | Mesoscale Discussion | SPC | 86 min |
| Dec 2, 10:52 PM CST | Dense Fog Advisory | LSX | 11 hr |
| Dec 8, 6:06 PM CST | Winter Weather Advisory | LSX | 6 hr |
| Dec 12, 3:41 PM CST | Winter Weather Advisory | LSX | 43 hr |
| Dec 13, 11:31 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 19, 3:41 AM CST | Flood Watch | LSX | 66 hr |
| Dec 20, 3:43 PM CST | Freezing Rain Advisory | LSX | 32 hr |
| Dec 21, 10:12 AM CST | Freezing Rain Advisory | LSX | 108 min |
| Dec 22, 12:15 AM CST | Freezing Rain Advisory | LSX | 4 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 | 28 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 43 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 6 |
| River Flood Warning | 21 |
| Flash Flood Watch | 4 |
| Flood Watch | 2 |
| Areal Flood Advisory | 7 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Freezing Rain Advisory | 3 |
| Winter Weather Advisory | 4 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20122014
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.