Alert archive / Missouri / Shannon County
Weather alerts in Shannon County, Missouri, 2011
200 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Shannon County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 200
- Warnings
- 78
- Watches
- 36
- Advisories
- 22
- Busiest month
- April65 alerts
- Busiest day
- April 23, 201123 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 4 tornado warnings covering Shannon County in 2011 had a tornado report inside them.
Shannon County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 35 | 13 | 63% | 13 | 85% | 27 min |
| Flash flood warnings | 13 | 11 | 15% | 13 | 100% | 255 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Springfield, MO: tornado warnings | 71 | 9 | 87% | 21 | 86% | 21 min |
| NWS Springfield, MO: severe thunderstorm warnings | 494 | 233 | 53% | 549 | 74% | 24 min |
| NWS Springfield, MO: flash flood warnings | 63 | 35 | 44% | 171 | 91% | 216 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, 3:07 PM CST | Winter Weather Advisory | SGF | 39 hr |
| Jan 11, 3:50 AM CST | Wind Chill Advisory | SGF | 32 hr |
| Jan 18, 4:00 PM CST | Winter Weather Advisory | SGF | 47 hr |
| Jan 22, 2:54 AM CST | Winter Weather Advisory | SGF | 25 hr |
| Jan 29, 3:27 PM CST | Winter Storm Watch | SGF | 37 hr |
| Jan 30, 4:35 PM CST | Winter Storm Warning | SGF | 51 hr |
| Feb 1, 6:54 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 1, 11:42 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 1, 7:47 PM CST | Wind Chill Advisory | SGF | 61 hr |
| Feb 4, 11:13 AM CST | Winter Weather Advisory | SGF | 21 hr |
| Feb 7, 2:35 PM CST | Winter Weather Advisory | SGF | 51 hr |
| Feb 24, 4:59 PM CST | Areal Flood Advisory | SGF | 6 hr |
| Feb 27, 4:57 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 27, 7:24 PM CST | Tornado Watch | SPC | 7 hr |
| Feb 27, 11:45 PM CST | Severe Thunderstorm Warning | SGF | 45 min |
| Mar 4, 1:33 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 4, 6:22 PM CST | Mesoscale Discussion | SPC | 53 min |
| Mar 4, 6:50 PM CST | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 23, 7:04 AM CDT | Red Flag Warning | PAH | 14 hr |
| Mar 26, 4:06 AM CDT | Freeze Watch | SGF | 10 hr |
| Mar 26, 2:30 PM CDT | Freeze Warning | SGF | 44 hr |
| Apr 2, 3:29 PM CDT | Wind Advisory | SGF | 29 hr |
| Apr 3, 8:15 AM CDT | Red Flag Warning | PAH | 11 hr |
| Apr 4, 1:16 AM CDT | Wind Advisory | SGF | 3 hr |
| Apr 4, 1:29 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 4, 3:18 PM CDT | Freeze Warning | SGF | 17 hr |
| Apr 6, 5:30 AM CDT | Red Flag Warning | PAH | 14 hr |
| Apr 10, 7:28 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 11, 1:34 AM CDT | Special Weather Statement | SGF | 41 min |
| Apr 11, 1:50 AM CDT | Severe Thunderstorm Warning | SGF | 33 min |
| Apr 11, 2:04 AM CDT | Mesoscale Discussion | SPC | 56 min |
| Apr 19, 1:00 PM CDT | Tornado Watch | SPC | 10 hr |
| Apr 19, 5:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Apr 19, 5:49 PM CDT | Severe Thunderstorm Warning | SGF | 41 min |
| Apr 19, 6:13 PM CDT | Severe Thunderstorm Warning | SGF | 62 min |
| Apr 19, 6:40 PM CDT | Severe Thunderstorm Warning | SGF | 65 min |
| Apr 19, 7:13 PM CDT | Severe Thunderstorm Warning | SGF | 62 min |
| Apr 19, 8:02 PM CDT | Severe Thunderstorm Warning | SGF | 43 min |
| Apr 19, 8:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 19, 8:38 PM CDT | Severe Thunderstorm Warning | SGF | 37 min |
| Apr 21, 1:22 PM CDT | Flash Flood Watch | SGF | 6 days |
| Apr 22, 8:01 AM CDT | Areal Flood Warning | SGF | 5 hr |
| Apr 22, 10:14 AM CDT | River Flood Warning | SGF | 15 hr |
| Apr 22, 10:44 AM CDT | Mesoscale Discussion | SPC | 61 min |
| Apr 22, 1:01 PM CDT | Areal Flood Warning | SGF | 4 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, 6:16 PM CDT | Severe Thunderstorm Warning | SGF | 59 min |
| Apr 22, 7:03 PM CDT | Severe Thunderstorm Warning | SGF | 57 min |
| Apr 22, 7:18 PM CDT | Tornado Warning | SGF | 42 min |
| Apr 22, 7:39 PM CDT | Flash Flood Warning | SGF | 8 hr |
| Apr 22, 8:02 PM CDT | Severe Thunderstorm Warning | SGF | 58 min |
| Apr 22, 10:20 PM CDT | Severe Thunderstorm Warning | SGF | 55 min |
| Apr 22, 10:49 PM CDT | Flash Flood Warning | SGF | 6 hr |
| Apr 22, 11:04 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 22, 11:10 PM CDT | Special Weather Statement | SGF | 50 min |
| Apr 22, 11:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 23, 12:29 AM CDT | Severe Thunderstorm Warning | SGF | 42 min |
| Apr 23, 12:40 AM CDT | Severe Thunderstorm Warning | SGF | 35 min |
| Apr 23, 2:33 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Apr 23, 3:58 AM CDT | Areal Flood Warning | SGF | 10 hr |
| Apr 23, 1:57 PM CDT | Areal Flood Warning | SGF | 4 hr |
| Apr 23, 3:58 PM CDT | Severe Thunderstorm Warning | SGF | 47 min |
| Apr 23, 4:09 PM CDT | Severe Thunderstorm Warning | SGF | 66 min |
| Apr 23, 4:34 PM CDT | Flash Flood Warning | SGF | 6 hr |
| Apr 23, 5:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 23, 5:10 PM CDT | Severe Thunderstorm Warning | SGF | 31 min |
| Apr 23, 5:31 PM CDT | Severe Thunderstorm Warning | SGF | 59 min |
| Apr 23, 5:38 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 23, 5:55 PM CDT | Areal Flood Warning | SGF | 6 hr |
| Apr 23, 6:56 PM CDT | Flash Flood Warning | SGF | 6 hr |
| Apr 23, 7:20 PM CDT | Severe Thunderstorm Warning | SGF | 40 min |
| Apr 23, 7:58 PM CDT | Severe Thunderstorm Warning | SGF | 62 min |
| Apr 23, 9:55 PM CDT | River Flood Warning | SGF | 70 hr |
| Apr 23, 10:57 PM CDT | Flash Flood Warning | SGF | 8 hr |
| Apr 24, 12:53 AM CDT | Flash Flood Warning | SGF | 6 hr |
| Apr 24, 6:50 AM CDT | Flash Flood Warning | SGF | 7 hr |
| Apr 24, 1:45 PM CDT | Flash Flood Warning | SGF | 17 hr |
| Apr 25, 6:43 AM CDT | Flash Flood Warning | SGF | 19 hr |
| Apr 25, 3:22 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 26, 2:00 AM CDT | Areal Flood Warning | SGF | 66 hr |
| Apr 26, 9:27 PM CDT | Special Weather Statement | SGF | 33 min |
| Apr 27, 6:46 AM CDT | River Flood Warning | SGF | 27 hr |
| Apr 27, 6:46 AM CDT | River Flood Warning | SGF | 27 hr |
| Apr 28, 12:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 30, 3:53 AM CDT | Flash Flood Watch | SGF | 68 hr |
| May 1, 7:51 PM CDT | Flash Flood Warning | SGF | 6 hr |
| May 1, 9:02 PM CDT | River Flood Warning | SGF | 23 hr |
| May 1, 9:02 PM CDT | River Flood Warning | SGF | 23 hr |
| May 1, 9:09 PM CDT | Flash Flood Warning | SGF | 5 hr |
| May 2, 1:51 AM CDT | Areal Flood Warning | SGF | 36 hr |
| May 3, 3:32 AM CDT | Frost Advisory | SGF | 29 hr |
| May 3, 2:00 PM CDT | Areal Flood Warning | SGF | 24 hr |
| May 6, 1:14 AM CDT | Dense Fog Advisory | SGF | 8 hr |
| May 7, 3:40 AM CDT | Mesoscale Discussion | SPC | 95 min |
| May 12, 9:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| May 12, 10:03 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 12, 10:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| May 12, 10:56 PM CDT | Special Weather Statement | SGF | 49 min |
| May 20, 11:05 AM CDT | Flash Flood Watch | SGF | 40 hr |
| May 22, 7:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| May 22, 8:26 PM CDT | Tornado Watch | SPC | 8 hr |
| May 22, 9:11 PM CDT | Severe Thunderstorm Warning | SGF | 64 min |
| May 23, 3:36 AM CDT | Flash Flood Watch | SGF | 63 hr |
| May 23, 5:07 AM CDT | Mesoscale Discussion | SPC | 113 min |
| May 23, 6:08 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 23, 10:34 AM CDT | Mesoscale Discussion | SPC | 86 min |
| May 23, 12:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 23, 12:59 PM CDT | Special Weather Statement | SGF | 61 min |
| May 23, 1:43 PM CDT | Severe Thunderstorm Warning | SGF | 20 min |
| May 23, 1:47 PM CDT | Tornado Warning | SGF | 43 min |
| May 23, 4:28 PM CDT | River Flood Warning | SGF | 16 hr |
| May 23, 10:17 PM CDT | Wind Advisory | SGF | 6 hr |
| May 25, 12:48 AM CDT | Mesoscale Discussion | SPC | 57 min |
| May 25, 1:22 AM CDT | Tornado Watch | SPC | 7 hr |
| May 25, 4:35 AM CDT | Tornado Warning | SGF | 40 min |
| May 25, 4:58 AM CDT | Mesoscale Discussion | SPC | 92 min |
| May 25, 9:54 AM CDT | Mesoscale Discussion | SPC | 96 min |
| May 25, 10:18 AM CDT | Mesoscale Discussion | SPC | 57 min |
| May 25, 10:37 AM CDT | Tornado Watch | SPC | 7 hr |
| May 25, 11:02 AM CDT | Mesoscale Discussion | SPC | 28 min |
| May 25, 2:35 PM CDT | Severe Thunderstorm Warning | SGF | 55 min |
| May 25, 2:41 PM CDT | Tornado Warning | SGF | 64 min |
| May 25, 3:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 25, 4:12 PM CDT | Severe Thunderstorm Warning | SGF | 42 min |
| Jun 11, 2:02 PM CDT | Severe Thunderstorm Warning | SGF | 28 min |
| Jun 13, 5:16 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 13, 11:23 AM CDT | Special Weather Statement | SGF | 52 min |
| Jun 14, 9:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 15, 12:29 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 1:09 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 18, 5:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 18, 7:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 18, 8:26 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 1:44 AM CDT | Severe Thunderstorm Warning | SGF | 61 min |
| Jun 19, 2:14 AM CDT | Mesoscale Discussion | SPC | 61 min |
| Jun 19, 2:45 AM CDT | Special Weather Statement | SGF | 30 min |
| 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, 7:36 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 26, 2:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 26, 2:24 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 26, 3:13 PM CDT | Severe Thunderstorm Warning | SGF | 62 min |
| Jun 27, 7:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 27, 8:21 PM CDT | Special Weather Statement | SGF | 24 min |
| Jun 28, 4:17 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 6, 1:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 6, 4:42 PM CDT | Severe Thunderstorm Warning | SGF | 20 min |
| Jul 7, 1:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jul 7, 5:03 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 8, 3:38 PM CDT | Heat Advisory | SGF | 4 days |
| Jul 13, 3:24 AM CDT | Flash Flood Warning | SGF | 6 hr |
| Jul 18, 3:45 AM CDT | Excessive Heat Watch | SGF | 12 hr |
| Jul 18, 3:37 PM CDT | Heat Advisory | SGF | 15 days |
| Jul 30, 4:17 AM CDT | Excessive Heat Warning | SGF | 9 days |
| Jul 30, 12:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 30, 3:04 PM CDT | Severe Thunderstorm Warning | SGF | 41 min |
| Jul 30, 4:18 PM CDT | Special Weather Statement | SGF | 27 min |
| Aug 2, 4:53 PM CDT | Heat Advisory | SGF | 6 days |
| Aug 4, 2:10 AM CDT | Mesoscale Discussion | SPC | 80 min |
| Aug 4, 3:28 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 4, 6:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 6, 9:54 PM CDT | Severe Thunderstorm Warning | SGF | 40 min |
| Aug 7, 6:07 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 7, 7:44 PM CDT | Severe Thunderstorm Warning | SGF | 61 min |
| Aug 7, 7:46 PM CDT | Severe Thunderstorm Warning | SGF | 59 min |
| Aug 7, 8:27 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 8:30 PM CDT | Severe Thunderstorm Warning | SGF | 45 min |
| Aug 7, 10:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 12, 1:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 12, 5:17 PM CDT | Severe Thunderstorm Warning | SGF | 58 min |
| Aug 19, 12:02 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 19, 1:38 AM CDT | Mesoscale Discussion | SPC | 67 min |
| Aug 19, 4:06 AM CDT | Special Weather Statement | SGF | 54 min |
| Aug 19, 4:08 AM CDT | Mesoscale Discussion | SPC | 67 min |
| Aug 20, 7:10 AM CDT | Severe Thunderstorm Warning | SGF | 65 min |
| Aug 20, 6:04 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 20, 7:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 24, 2:43 AM CDT | Special Weather Statement | SGF | 32 min |
| Sep 10, 6:55 PM CDT | Special Weather Statement | SGF | 50 min |
| Sep 20, 7:24 AM CDT | Dense Fog Advisory | SGF | 3 hr |
| Sep 22, 11:53 PM CDT | Dense Fog Advisory | SGF | 10 hr |
| Oct 12, 10:42 PM CDT | Special Weather Statement | SGF | 33 min |
| Oct 14, 9:41 AM CDT | Red Flag Warning | PAH | 8 hr |
| Oct 14, 3:19 PM CDT | Fire Weather Watch | PAH | 36 hr |
| Oct 18, 3:52 PM CDT | Freeze Watch | SGF | 12 hr |
| Oct 20, 4:10 AM CDT | Frost Advisory | SGF | 29 hr |
| Oct 27, 3:45 AM CDT | Frost Advisory | SGF | 29 hr |
| Oct 28, 3:39 AM CDT | Freeze Warning | SGF | 29 hr |
| Nov 8, 1:17 AM CST | Mesoscale Discussion | SPC | 118 min |
| Nov 9, 2:25 PM CST | Freeze Warning | SGF | 18 hr |
| Nov 20, 3:34 PM CST | Flash Flood Watch | SGF | 36 hr |
| Nov 20, 4:35 PM CST | Dense Fog Advisory | SGF | 21 hr |
| Nov 22, 12:10 AM CST | Flash Flood Warning | SGF | 5 hr |
| Nov 22, 4:49 AM CST | Areal Flood Warning | SGF | 7 hr |
| Nov 28, 7:18 PM CST | Winter Weather Advisory | SGF | 8 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
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.