Alert archive / Missouri / Boone County
Weather alerts in Boone County, Missouri, 2015
119 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Boone County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 119
- Warnings
- 41
- Watches
- 26
- Advisories
- 20
- Busiest month
- July29 alerts
- Busiest day
- April 8, 20158 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 3 tornado warnings covering Boone County in 2015 had a tornado report inside them.
Boone County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 10 | 4 | 60% | 14 | 43% | 20 min |
| Flash flood warnings | 6 | 4 | 33% | 7 | 71% | 21 min |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS St. Louis, MO: tornado warnings | 45 | 5 | 89% | 16 | 50% | 11 min |
| NWS St. Louis, MO: severe thunderstorm warnings | 214 | 98 | 54% | 378 | 74% | 23 min |
| NWS St. Louis, MO: flash flood warnings | 96 | 41 | 57% | 126 | 83% | 176 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 6, 4:16 AM CST | Wind Chill Advisory | LSX | 53 hr |
| Jan 10, 3:10 PM CST | Winter Weather Advisory | LSX | 42 hr |
| Feb 15, 2:50 AM CST | Winter Storm Warning | LSX | 37 hr |
| Feb 19, 3:58 PM CST | Winter Weather Advisory | LSX | 42 hr |
| Feb 20, 6:37 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 22, 3:36 AM CST | Wind Chill Advisory | LSX | 29 hr |
| Feb 27, 4:12 PM CST | Winter Weather Advisory | LSX | 47 hr |
| Mar 24, 2:59 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 24, 5:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Mar 24, 7:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 2, 5:22 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Apr 7, 3:51 AM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 7, 4:59 AM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| Apr 8, 6:17 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Apr 8, 6:39 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 8, 9:33 AM CDT | Mesoscale Discussion | SPC | 57 min |
| Apr 8, 12:46 PM CDT | Severe Thunderstorm Warning | LSX | 44 min |
| Apr 8, 3:24 PM CDT | Flash Flood Watch | LSX | 31 hr |
| Apr 8, 5:45 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Apr 8, 6:27 PM CDT | Severe Thunderstorm Warning | LSX | 33 min |
| Apr 8, 6:56 PM CDT | Severe Thunderstorm Warning | LSX | 49 min |
| Apr 9, 12:58 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 9, 3:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 9, 3:20 PM CDT | Severe Thunderstorm Warning | LSX | 40 min |
| Apr 9, 3:54 PM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| Apr 22, 3:27 PM CDT | Frost Advisory | LSX | 17 hr |
| May 10, 11:00 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 10, 1:22 PM CDT | Tornado Watch | SPC | 4 hr |
| May 14, 3:44 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 15, 2:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 6:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 8:06 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| May 15, 8:24 PM CDT | Flash Flood Warning | LSX | 3 hr |
| May 19, 6:48 AM CDT | River Flood Warning | LSX | 33 hr |
| May 24, 12:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| May 24, 1:18 PM CDT | Tornado Watch | SPC | 6 hr |
| May 24, 3:19 PM CDT | Severe Thunderstorm Warning | LSX | 41 min |
| May 29, 3:13 PM CDT | River Flood Warning | LSX | 41 hr |
| May 29, 8:55 PM CDT | Flash Flood Watch | LSX | 22 hr |
| Jun 5, 11:40 AM CDT | River Flood Warning | LSX | 8 days |
| Jun 7, 7:48 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 7, 9:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 7, 10:15 PM CDT | Severe Thunderstorm Warning | LSX | 48 min |
| Jun 8, 12:38 AM CDT | Flash Flood Warning | LSX | 8 hr |
| Jun 8, 8:27 AM CDT | Areal Flood Warning | LSX | 5 hr |
| Jun 13, 11:05 AM CDT | River Flood Warning | LSX | 7 days |
| Jun 13, 3:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 13, 4:58 PM CDT | Tornado Warning | LSX | 32 min |
| Jun 13, 5:29 PM CDT | Tornado Warning | LSX | 31 min |
| Jun 16, 3:42 AM CDT | Flash Flood Watch | LSX | 4 days |
| Jun 21, 9:42 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 12:12 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 25, 4:06 AM CDT | Flash Flood Watch | LSX | 39 hr |
| Jun 25, 4:53 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 25, 7:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 25, 7:31 PM CDT | Flash Flood Warning | LSX | 12 hr |
| Jun 25, 8:45 PM CDT | River Flood Warning | LSX | 8 days |
| Jun 25, 9:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 26, 7:30 AM CDT | Areal Flood Warning | LSX | 12 hr |
| Jun 28, 1:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 28, 3:03 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 28, 4:22 PM CDT | Severe Thunderstorm Warning | LSX | 38 min |
| Jun 30, 4:08 PM CDT | Flash Flood Watch | LSX | 36 hr |
| Jul 1, 7:43 PM CDT | Tornado Warning | LSX | 32 min |
| Jul 1, 7:55 PM CDT | Flash Flood Warning | LSX | 4 hr |
| Jul 1, 8:25 PM CDT | Severe Thunderstorm Warning | LSX | 50 min |
| Jul 1, 11:58 PM CDT | Areal Flood Warning | LSX | 9 hr |
| Jul 2, 8:59 AM CDT | Areal Flood Warning | LSX | 12 hr |
| Jul 2, 4:50 PM CDT | River Flood Warning | LSX | 47 hr |
| Jul 6, 3:55 AM CDT | Flash Flood Watch | LSX | 68 hr |
| Jul 6, 3:26 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 6, 6:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 8, 10:01 PM CDT | River Flood Warning | LSX | 3 days |
| Jul 9, 3:35 AM CDT | Flash Flood Watch | LSX | 27 hr |
| Jul 11, 3:30 PM CDT | Heat Advisory | LSX | 3 days |
| Jul 13, 4:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Jul 13, 6:20 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 16, 3:46 PM CDT | Heat Advisory | LSX | 3 days |
| Jul 19, 4:35 AM CDT | Flash Flood Watch | LSX | 11 hr |
| Jul 19, 9:13 AM CDT | Areal Flood Advisory | LSX | 6 hr |
| Jul 19, 4:03 PM CDT | Flash Flood Watch | LSX | 20 hr |
| Jul 19, 4:40 PM CDT | River Flood Warning | LSX | 6 days |
| Jul 24, 2:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 24, 2:35 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jul 24, 3:59 PM CDT | Heat Advisory | LSX | 27 hr |
| Jul 25, 2:16 AM CDT | Special Weather Statement | LSX | 44 min |
| Jul 25, 4:05 PM CDT | Heat Advisory | LSX | 48 hr |
| Jul 25, 4:09 PM CDT | Flash Flood Watch | LSX | 20 hr |
| Jul 25, 9:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 26, 2:06 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 2:10 AM CDT | Special Weather Statement | LSX | 50 min |
| Jul 27, 3:40 PM CDT | Excessive Heat Warning | LSX | 48 hr |
| Aug 4, 2:44 PM CDT | Flash Flood Watch | LSX | 25 hr |
| Aug 9, 2:50 AM CDT | Heat Advisory | LSX | 16 hr |
| Aug 9, 3:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 5:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Aug 22, 6:47 AM CDT | Flash Flood Warning | LSX | 4 hr |
| Sep 18, 7:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Oct 16, 2:36 AM CDT | Frost Advisory | LSX | 29 hr |
| Oct 17, 2:52 AM CDT | Frost Advisory | LSX | 29 hr |
| Oct 19, 3:28 AM CDT | Red Flag Warning | LSX | 16 hr |
| Nov 1, 3:48 AM CST | Dense Fog Advisory | LSX | 4 hr |
| Nov 2, 8:43 PM CST | Dense Fog Advisory | LSX | 13 hr |
| Nov 10, 6:56 PM CST | Wind Advisory | LSX | 35 hr |
| Nov 11, 10:17 AM CST | Mesoscale Discussion | SPC | 118 min |
| Nov 11, 3:20 PM CST | Tornado Watch | SPC | 6 hr |
| Nov 17, 3:42 PM CST | Areal Flood Warning | LSX | 6 hr |
| Nov 17, 4:56 PM CST | Areal Flood Warning | LSX | 6 hr |
| Nov 17, 9:42 PM CST | Areal Flood Warning | LSX | 12 hr |
| Nov 25, 3:24 AM CST | Flood Watch | LSX | 3 days |
| Dec 14, 12:20 PM CST | River Flood Warning | LSX | 6 days |
| Dec 23, 12:42 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 23, 1:29 PM CST | Wind Advisory | LSX | 9 hr |
| Dec 25, 2:17 AM CST | Flash Flood Watch | LSX | 4 days |
| Dec 26, 7:59 PM CST | River Flood Warning | LSX | 6 days |
| Dec 26, 10:26 PM CST | Flash Flood Warning | LSX | 8 hr |
| Dec 27, 3:17 AM CST | Areal Flood Warning | LSX | 12 hr |
| Dec 27, 3:05 PM CST | Areal Flood Warning | LSX | 24 hr |
| Dec 27, 3:55 PM CST | Wind Advisory | LSX | 23 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 | 10 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 30 |
| Special Weather Statement | 2 |
| Flooding | |
| Areal Flood Warning | 9 |
| Flash Flood Warning | 6 |
| River Flood Warning | 10 |
| Flash Flood Watch | 12 |
| Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 3 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 5 |
| Cold | |
| Frost Advisory | 3 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.