Alert archive / Missouri / Shannon County
Weather alerts in Shannon County, Missouri, 2009
195 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 195
- Warnings
- 77
- Watches
- 43
- Advisories
- 26
- Busiest month
- June53 alerts
- Busiest day
- June 10, 200913 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 9 tornado warnings covering Shannon County in 2009 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 5 minutes after it went out.
Shannon County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 9 | 2 | 78% | 1 | 100% | 5 min |
| Severe thunderstorm warnings | 20 | 7 | 65% | 14 | 57% | 45 min |
| Flash flood warnings | 22 | 13 | 41% | 4 | 100% | 315 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Springfield, MO: tornado warnings | 125 | 17 | 86% | 48 | 65% | 19 min |
| NWS Springfield, MO: severe thunderstorm warnings | 398 | 172 | 57% | 548 | 78% | 31 min |
| NWS Springfield, MO: flash flood warnings | 190 | 119 | 37% | 379 | 92% | 246 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 5, 2:24 PM CST | Winter Weather Advisory | SGF | 15 hr |
| Jan 14, 3:24 AM CST | Wind Chill Advisory | SGF | 33 hr |
| Jan 25, 4:32 AM CST | Winter Storm Watch | SGF | 23 hr |
| Jan 25, 8:50 PM CST | Ice Storm Warning | SGF | 31 hr |
| Jan 26, 3:19 AM CST | Winter Storm Warning | SGF | 50 hr |
| Jan 26, 6:59 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 26, 11:44 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 27, 12:16 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 27, 6:25 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 29, 7:53 AM CST | Freezing Fog Advisory | SGF | 2 hr |
| Feb 9, 3:32 PM CST | Flash Flood Watch | SGF | 44 hr |
| Feb 10, 2:18 PM CST | Wind Advisory | SGF | 23 hr |
| Feb 10, 5:32 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 10, 11:13 PM CST | Mesoscale Discussion | SPC | 92 min |
| Feb 10, 11:45 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 11, 2:30 AM CST | Mesoscale Discussion | SPC | 90 min |
| Feb 11, 5:45 AM CST | Areal Flood Warning | SGF | 11 hr |
| Feb 11, 4:56 PM CST | Areal Flood Warning | SGF | 18 hr |
| Feb 26, 5:19 PM CST | Severe Thunderstorm Watch | SPC | 7 hr |
| Feb 26, 7:42 PM CST | Mesoscale Discussion | SPC | 93 min |
| Feb 26, 8:42 PM CST | Severe Thunderstorm Warning | SGF | 48 min |
| Feb 26, 10:36 PM CST | Mesoscale Discussion | SPC | 114 min |
| Feb 27, 3:20 PM CST | Winter Weather Advisory | SGF | 29 hr |
| Feb 28, 11:47 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Mar 5, 9:09 AM CST | Wind Advisory | SGF | 9 hr |
| Mar 8, 6:32 AM CDT | Tornado Watch | SPC | 7 hr |
| Mar 8, 9:26 AM CDT | Mesoscale Discussion | SPC | 64 min |
| Mar 8, 10:02 AM CDT | Tornado Warning | SGF | 73 min |
| Mar 8, 1:15 PM CDT | Wind Advisory | SGF | 5 hr |
| Mar 10, 3:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 10, 6:38 PM CDT | Severe Thunderstorm Warning | SGF | 38 min |
| Mar 11, 2:06 PM CDT | Winter Weather Advisory | SGF | 14 hr |
| Mar 16, 5:32 AM CDT | Dense Fog Advisory | SGF | 5 hr |
| Mar 17, 4:09 AM CDT | Dense Fog Advisory | SGF | 5 hr |
| Mar 24, 9:38 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Mar 24, 12:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Mar 24, 2:43 PM CDT | Severe Thunderstorm Warning | SGF | 47 min |
| Mar 24, 3:15 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 24, 3:39 PM CDT | Flash Flood Warning | SGF | 6 hr |
| Mar 24, 9:58 PM CDT | Areal Flood Warning | SGF | 12 hr |
| Apr 3, 9:47 AM CDT | Freeze Watch | SGF | 53 hr |
| Apr 4, 1:55 PM CDT | Red Flag Warning | PAH | 5 hr |
| Apr 5, 2:33 AM CDT | Freeze Watch | SGF | 25 hr |
| Apr 5, 2:40 PM CDT | Freeze Warning | SGF | 42 hr |
| Apr 7, 3:13 AM CDT | Frost Advisory | SGF | 29 hr |
| Apr 8, 2:42 PM CDT | Red Flag Warning | PAH | 3 hr |
| Apr 9, 7:21 PM CDT | Tornado Watch | SPC | 5 hr |
| Apr 9, 9:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 9, 10:03 PM CDT | Severe Thunderstorm Warning | SGF | 72 min |
| Apr 14, 3:52 AM CDT | Frost Advisory | SGF | 24 hr |
| Apr 19, 12:14 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Apr 21, 9:54 AM CDT | Red Flag Warning | PAH | 9 hr |
| Apr 27, 2:55 AM CDT | Flash Flood Watch | SGF | 21 hr |
| Apr 27, 12:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 27, 8:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 28, 5:43 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Apr 29, 3:06 AM CDT | Flash Flood Watch | SGF | 4 days |
| May 1, 3:22 AM CDT | Flash Flood Warning | SGF | 5 hr |
| May 1, 6:28 AM CDT | Areal Flood Warning | SGF | 8 hr |
| May 7, 2:21 PM CDT | Flash Flood Watch | SGF | 21 hr |
| May 7, 10:17 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 7, 11:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 8, 4:55 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 8, 7:35 AM CDT | High Wind Warning | SGF | 4 hr |
| May 8, 8:55 AM CDT | Severe Thunderstorm Warning | SGF | 65 min |
| May 8, 9:21 AM CDT | Tornado Watch | SPC | 7 hr |
| May 8, 9:40 AM CDT | Tornado Warning | SGF | 50 min |
| May 8, 9:56 AM CDT | Severe Thunderstorm Warning | SGF | 64 min |
| May 8, 12:00 PM CDT | Flash Flood Warning | SGF | 6 hr |
| May 8, 6:00 PM CDT | Areal Flood Warning | SGF | 18 hr |
| May 12, 3:34 PM CDT | Flash Flood Watch | SGF | 35 hr |
| May 12, 6:30 PM CDT | Wind Advisory | SGF | 3 hr |
| May 13, 1:15 PM CDT | Mesoscale Discussion | SPC | 30 min |
| May 13, 9:56 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 13, 11:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 14, 12:20 AM CDT | Tornado Warning | SGF | 70 min |
| May 14, 12:34 AM CDT | Flash Flood Warning | SGF | 5 hr |
| May 15, 2:59 PM CDT | Flash Flood Watch | SGF | 13 hr |
| May 15, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 25, 12:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 27, 1:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 2, 3:29 AM CDT | Flash Flood Watch | SGF | 23 hr |
| Jun 2, 9:31 PM CDT | Flash Flood Warning | SGF | 5 hr |
| Jun 8, 3:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 8, 4:33 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 8, 7:18 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Jun 9, 1:31 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 9, 1:51 PM CDT | Severe Thunderstorm Warning | SGF | 54 min |
| Jun 9, 2:12 PM CDT | Tornado Warning | SGF | 48 min |
| Jun 9, 2:58 PM CDT | Tornado Warning | SGF | 47 min |
| Jun 9, 3:08 PM CDT | Flash Flood Warning | SGF | 6 hr |
| Jun 9, 3:43 PM CDT | Tornado Warning | SGF | 14 min |
| Jun 9, 4:41 PM CDT | Severe Thunderstorm Warning | SGF | 48 min |
| Jun 9, 5:59 PM CDT | Severe Thunderstorm Warning | SGF | 61 min |
| Jun 9, 6:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 9, 6:31 PM CDT | Severe Thunderstorm Warning | SGF | 59 min |
| Jun 9, 7:06 PM CDT | Flash Flood Warning | SGF | 4 hr |
| Jun 9, 7:23 PM CDT | Severe Thunderstorm Warning | SGF | 67 min |
| Jun 9, 8:05 PM CDT | Flash Flood Warning | SGF | 5 hr |
| Jun 9, 9:13 PM CDT | Flash Flood Warning | SGF | 11 hr |
| Jun 9, 9:46 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 10, 2:26 AM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 10, 3:33 AM CDT | Mesoscale Discussion | SPC | 27 min |
| Jun 10, 5:20 AM CDT | Mesoscale Discussion | SPC | 55 min |
| Jun 10, 11:47 AM CDT | Flash Flood Watch | SGF | 18 hr |
| Jun 10, 4:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 10, 5:15 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 10, 6:25 PM CDT | Severe Thunderstorm Warning | SGF | 53 min |
| Jun 10, 6:32 PM CDT | Tornado Warning | SGF | 33 min |
| Jun 10, 7:10 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jun 10, 7:34 PM CDT | Flash Flood Warning | SGF | 4 hr |
| Jun 10, 8:01 PM CDT | Severe Thunderstorm Warning | SGF | 59 min |
| Jun 10, 8:58 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 10, 11:48 PM CDT | Areal Flood Warning | SGF | 9 hr |
| Jun 11, 6:40 PM CDT | Flash Flood Watch | SGF | 21 hr |
| Jun 13, 2:33 AM CDT | Dense Fog Advisory | SGF | 5 hr |
| Jun 15, 6:24 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 15, 9:59 AM CDT | Mesoscale Discussion | SPC | 31 min |
| Jun 15, 11:59 AM CDT | Mesoscale Discussion | SPC | 61 min |
| Jun 15, 12:52 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 15, 1:24 PM CDT | Severe Thunderstorm Warning | SGF | 51 min |
| Jun 15, 2:10 PM CDT | Severe Thunderstorm Warning | SGF | 35 min |
| Jun 15, 2:41 PM CDT | Flash Flood Warning | SGF | 5 hr |
| Jun 15, 3:35 PM CDT | Flash Flood Watch | SGF | 20 hr |
| Jun 15, 3:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 15, 6:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 15, 10:49 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 16, 4:52 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 16, 6:02 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 16, 7:47 AM CDT | Severe Thunderstorm Warning | SGF | 43 min |
| Jun 16, 9:51 AM CDT | Flash Flood Warning | SGF | 6 hr |
| Jun 17, 7:16 PM CDT | Tornado Watch | SPC | 4 hr |
| Jun 23, 4:00 AM CDT | Heat Advisory | SGF | 42 hr |
| Jun 25, 4:05 AM CDT | Heat Advisory | SGF | 65 hr |
| Jul 4, 11:52 AM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 11, 6:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 11, 8:40 PM CDT | Tornado Warning | SGF | 35 min |
| Jul 11, 9:12 PM CDT | Tornado Warning | SGF | 48 min |
| Jul 15, 2:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 15, 2:26 PM CDT | Severe Thunderstorm Warning | SGF | 64 min |
| Jul 15, 2:48 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 15, 3:13 PM CDT | Severe Thunderstorm Warning | SGF | 36 min |
| Jul 16, 3:13 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 16, 4:59 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Jul 20, 7:24 PM CDT | Flash Flood Watch | SGF | 20 hr |
| Jul 29, 11:26 PM CDT | Flash Flood Warning | SGF | 6 hr |
| Jul 30, 4:54 AM CDT | Areal Flood Advisory | SGF | 5 hr |
| Jul 30, 1:24 PM CDT | Flash Flood Warning | SGF | 5 hr |
| Jul 30, 5:57 PM CDT | Flash Flood Warning | SGF | 6 hr |
| Jul 30, 11:55 PM CDT | Areal Flood Warning | SGF | 10 hr |
| Aug 4, 2:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 4, 3:09 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 4, 6:21 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 4, 8:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 16, 6:49 PM CDT | Flash Flood Warning | SGF | 2 hr |
| Aug 17, 1:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 3:41 PM CDT | Severe Thunderstorm Warning | SGF | 64 min |
| Aug 19, 4:40 PM CDT | Flash Flood Warning | SGF | 3 hr |
| Aug 19, 11:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Aug 19, 11:26 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 19, 11:48 PM CDT | Severe Thunderstorm Warning | SGF | 72 min |
| Aug 20, 2:18 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Sep 4, 8:16 PM CDT | Areal Flood Advisory | SGF | 6 hr |
| Sep 5, 12:45 AM CDT | Flash Flood Warning | SGF | 5 hr |
| Sep 5, 6:20 AM CDT | Areal Flood Warning | SGF | 6 hr |
| Sep 6, 8:39 PM CDT | Dense Fog Advisory | SGF | 13 hr |
| Sep 21, 3:25 AM CDT | Flash Flood Watch | SGF | 24 hr |
| Sep 21, 4:00 AM CDT | Dense Fog Advisory | SGF | 5 hr |
| Sep 26, 1:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Oct 1, 5:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Oct 7, 4:00 AM CDT | Flash Flood Watch | SGF | 47 hr |
| Oct 8, 7:55 PM CDT | Flash Flood Warning | SGF | 14 hr |
| Oct 8, 9:00 PM CDT | River Flood Warning | SGF | 13 hr |
| Oct 9, 10:00 AM CDT | Areal Flood Warning | SGF | 24 hr |
| Oct 10, 9:58 AM CDT | Areal Flood Warning | SGF | 24 hr |
| Oct 16, 1:38 PM CDT | Freeze Watch | SGF | 13 hr |
| Oct 17, 2:33 AM CDT | Frost Advisory | SGF | 30 hr |
| Oct 17, 2:35 PM CDT | Freeze Warning | SGF | 18 hr |
| Oct 22, 5:37 PM CDT | Flash Flood Warning | SGF | 6 hr |
| Oct 22, 11:53 PM CDT | Areal Flood Warning | SGF | 10 hr |
| Oct 23, 2:52 AM CDT | Frost Advisory | SGF | 30 hr |
| Oct 23, 9:37 AM CDT | Areal Flood Warning | SGF | 24 hr |
| Oct 28, 3:30 PM CDT | Flash Flood Watch | SGF | 36 hr |
| Oct 29, 3:14 PM CDT | Areal Flood Warning | SGF | 4 hr |
| Oct 29, 6:56 PM CDT | Areal Flood Warning | SGF | 15 hr |
| Oct 29, 7:38 PM CDT | River Flood Warning | SGF | 30 hr |
| Oct 29, 9:22 PM CDT | Flash Flood Warning | SGF | 6 hr |
| Oct 30, 2:59 AM CDT | Flash Flood Warning | SGF | 6 hr |
| Oct 30, 8:59 AM CDT | Areal Flood Warning | SGF | 9 hr |
| Oct 30, 6:00 PM CDT | Areal Flood Warning | SGF | 18 hr |
| Nov 4, 3:36 AM CST | Frost Advisory | SGF | 28 hr |
| Nov 16, 9:35 AM CST | Areal Flood Advisory | SGF | 23 hr |
| Dec 22, 5:34 PM CST | Flash Flood Watch | SGF | 42 hr |
| Dec 24, 4:00 AM CST | Winter Weather Advisory | SGF | 29 hr |
| Dec 30, 11:23 PM CST | Dense Fog Advisory | SGF | 5 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 | 20 |
| Tornado Warning | 9 |
| Severe Thunderstorm Watch | 16 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 49 |
| Flooding | |
| Areal Flood Warning | 16 |
| Flash Flood Warning | 22 |
| River Flood Warning | 2 |
| Flash Flood Watch | 15 |
| Areal Flood Advisory | 3 |
| Winter | |
| Ice Storm Warning | 1 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 4 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 3 |
| Frost Advisory | 5 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.