Alert archive / Missouri / Shannon County
Weather alerts in Shannon County, Missouri, 2017
136 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 136
- Warnings
- 59
- Watches
- 20
- Advisories
- 23
- Busiest month
- April40 alerts
- Busiest day
- May 27, 201713 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 6 tornado warnings covering Shannon County in 2017 had a tornado report inside them.
Shannon County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 6 | 1 | 83% | 0 | ||
| Severe thunderstorm warnings | 23 | 12 | 48% | 10 | 80% | 25 min |
| Flash flood warnings | 5 | 2 | 60% | 1 | 0% |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Springfield, MO: tornado warnings | 51 | 19 | 63% | 57 | 63% | 17 min |
| NWS Springfield, MO: severe thunderstorm warnings | 365 | 248 | 32% | 740 | 79% | 26 min |
| NWS Springfield, MO: flash flood warnings | 80 | 53 | 34% | 149 | 91% | 244 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 1, 8:37 PM CST | Dense Fog Advisory | SGF | 12 hr |
| Jan 2, 5:47 PM CST | Dense Fog Advisory | SGF | 15 hr |
| Jan 4, 4:07 AM CST | Winter Weather Advisory | SGF | 32 hr |
| Jan 10, 12:05 AM CST | Wind Advisory | SGF | 18 hr |
| Jan 11, 3:44 AM CST | Winter Storm Watch | SGF | 34 hr |
| Jan 12, 1:21 PM CST | Ice Storm Warning | SGF | 71 hr |
| Jan 13, 3:39 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 15, 9:33 AM CST | Dense Fog Advisory | SGF | 22 hr |
| Jan 19, 2:57 PM CST | Dense Fog Advisory | SGF | 18 hr |
| Feb 19, 12:50 AM CST | Dense Fog Advisory | SGF | 8 hr |
| Feb 21, 2:38 PM CST | Dense Fog Advisory | SGF | 18 hr |
| Feb 23, 3:36 AM CST | Dense Fog Advisory | SGF | 5 hr |
| Feb 28, 2:29 AM CST | Special Weather Statement | SGF | 46 min |
| Feb 28, 4:07 AM CST | Special Weather Statement | SGF | 23 min |
| Feb 28, 1:46 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 28, 2:19 PM CST | Tornado Watch | SPC | 7 hr |
| Feb 28, 5:28 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 28, 5:37 PM CST | Severe Thunderstorm Warning | SGF | 21 days |
| Feb 28, 6:12 PM CST | Tornado Warning | SGF | 14 min |
| Feb 28, 9:04 PM CST | Tornado Watch | SPC | 7 hr |
| Mar 1, 12:16 AM CST | Mesoscale Discussion | SPC | 89 min |
| Mar 1, 2:16 AM CST | Severe Thunderstorm Warning | SGF | 59 min |
| Mar 1, 2:53 AM CST | Severe Thunderstorm Warning | SGF | 44 min |
| Mar 6, 6:51 PM CST | Tornado Watch | SPC | 8 hr |
| Mar 6, 8:10 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Mar 6, 11:13 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 7, 12:41 AM CST | Tornado Warning | SGF | 49 min |
| Mar 9, 11:10 AM CST | Severe Thunderstorm Watch | SPC | 10 hr |
| Mar 9, 2:26 PM CST | Freeze Warning | SGF | 70 hr |
| Mar 9, 4:21 PM CST | Severe Thunderstorm Warning | SGF | 54 min |
| Mar 9, 5:12 PM CST | Severe Thunderstorm Warning | SGF | 48 min |
| Mar 9, 5:49 PM CST | Severe Thunderstorm Warning | SGF | 56 min |
| Mar 13, 11:49 AM CDT | Freeze Warning | SGF | 23 hr |
| Mar 13, 11:49 AM CDT | Freeze Warning | SGF | 47 hr |
| Mar 15, 5:34 AM CDT | Freeze Warning | SGF | 24 hr |
| Mar 24, 9:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Mar 29, 3:48 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 29, 9:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 4, 9:12 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 4, 9:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 4, 11:01 PM CDT | Tornado Warning | SGF | 44 min |
| Apr 4, 11:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 4, 11:41 PM CDT | Tornado Warning | SGF | 37 min |
| Apr 4, 11:50 PM CDT | Severe Thunderstorm Warning | SGF | 37 min |
| Apr 6, 2:14 AM CDT | Frost Advisory | SGF | 31 hr |
| Apr 10, 5:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 16, 11:58 AM CDT | Special Weather Statement | SGF | 32 min |
| Apr 19, 3:55 PM CDT | Flood Watch | SGF | 60 hr |
| Apr 21, 8:25 AM CDT | Areal Flood Warning | SGF | 12 hr |
| Apr 21, 1:54 PM CDT | Areal Flood Warning | SGF | 12 hr |
| Apr 21, 6:19 PM CDT | Flash Flood Warning | SGF | 12 hr |
| Apr 22, 12:16 AM CDT | River Flood Warning | SGF | 22 hr |
| Apr 22, 1:49 AM CDT | Areal Flood Warning | SGF | 18 hr |
| Apr 22, 4:00 PM CDT | River Flood Warning | SGF | 31 hr |
| Apr 22, 8:45 PM CDT | Areal Flood Advisory | SGF | 18 hr |
| Apr 26, 9:35 AM CDT | Severe Thunderstorm Warning | SGF | 40 min |
| Apr 26, 10:13 AM CDT | Severe Thunderstorm Warning | SGF | 47 min |
| Apr 26, 10:54 AM CDT | Special Weather Statement | SGF | 36 min |
| Apr 26, 11:33 AM CDT | Areal Flood Warning | SGF | 6 hr |
| Apr 26, 5:16 PM CDT | Areal Flood Warning | SGF | 18 hr |
| Apr 26, 10:24 PM CDT | River Flood Warning | SGF | 22 hr |
| Apr 27, 4:09 AM CDT | Flash Flood Watch | SGF | 4 days |
| Apr 27, 12:18 PM CDT | Areal Flood Advisory | SGF | 24 hr |
| Apr 28, 11:04 AM CDT | River Flood Warning | SGF | 3 days |
| Apr 28, 11:04 AM CDT | River Flood Warning | SGF | 3 days |
| Apr 28, 1:07 PM CDT | Severe Thunderstorm Warning | SGF | 23 min |
| Apr 28, 6:28 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 28, 10:01 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Apr 28, 10:43 PM CDT | Severe Thunderstorm Warning | SGF | 62 min |
| Apr 28, 11:39 PM CDT | Severe Thunderstorm Warning | SGF | 66 min |
| Apr 28, 11:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Apr 29, 3:39 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 29, 4:19 AM CDT | Flash Flood Warning | SGF | 8 hr |
| Apr 29, 12:11 PM CDT | Flash Flood Warning | SGF | 12 hr |
| Apr 29, 12:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 29, 5:06 PM CDT | Severe Thunderstorm Warning | SGF | 24 min |
| Apr 29, 6:50 PM CDT | Flash Flood Warning | SGF | 6 hr |
| Apr 29, 11:54 PM CDT | Flash Flood Warning | SGF | 22 hr |
| Apr 30, 9:20 PM CDT | Areal Flood Warning | SGF | 48 hr |
| May 2, 3:14 AM CDT | Flash Flood Watch | SGF | 52 hr |
| May 2, 9:24 AM CDT | River Flood Warning | SGF | 70 hr |
| May 2, 9:24 AM CDT | River Flood Warning | SGF | 4 days |
| May 3, 3:32 AM CDT | Areal Flood Warning | SGF | 24 hr |
| May 4, 3:30 AM CDT | Areal Flood Warning | SGF | 12 hr |
| May 4, 3:05 PM CDT | Areal Flood Warning | SGF | 18 hr |
| May 11, 10:46 AM CDT | Flash Flood Watch | SGF | 13 hr |
| May 11, 3:17 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 11, 5:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 11, 6:40 PM CDT | Severe Thunderstorm Warning | SGF | 44 min |
| May 17, 3:37 AM CDT | Wind Advisory | SGF | 15 hr |
| May 18, 10:58 PM CDT | Tornado Watch | SPC | 6 hr |
| May 19, 3:01 AM CDT | Tornado Warning | SGF | 44 min |
| May 19, 9:16 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 19, 9:42 PM CDT | Tornado Watch | SPC | 7 hr |
| May 19, 11:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| May 27, 12:06 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 27, 2:04 AM CDT | Mesoscale Discussion | SPC | 116 min |
| May 27, 3:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 9:59 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 11:21 AM CDT | Flash Flood Watch | SGF | 16 hr |
| May 27, 12:13 PM CDT | Tornado Watch | SPC | 7 hr |
| May 27, 1:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 27, 3:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| May 27, 3:45 PM CDT | Severe Thunderstorm Warning | SGF | 60 min |
| May 27, 4:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| May 27, 4:28 PM CDT | Severe Thunderstorm Warning | SGF | 32 min |
| May 27, 6:23 PM CDT | Severe Thunderstorm Warning | SGF | 52 min |
| May 27, 6:58 PM CDT | Severe Thunderstorm Warning | SGF | 32 min |
| May 27, 7:01 PM CDT | Tornado Watch | SPC | 6 hr |
| May 27, 7:48 PM CDT | Tornado Warning | SGF | 27 min |
| May 27, 7:59 PM CDT | Severe Thunderstorm Warning | SGF | 61 min |
| May 28, 12:04 AM CDT | Areal Flood Warning | SGF | 12 hr |
| Jul 5, 7:39 PM CDT | Areal Flood Advisory | SGF | 6 hr |
| Jul 18, 2:36 PM CDT | Heat Advisory | SGF | 5 days |
| Jul 25, 2:41 PM CDT | Heat Advisory | SGF | 29 hr |
| Aug 3, 6:20 PM CDT | Special Weather Statement | SGF | 40 min |
| Aug 6, 3:03 AM CDT | Areal Flood Warning | SGF | 9 hr |
| Aug 15, 4:19 AM CDT | Dense Fog Advisory | SGF | 5 hr |
| Aug 20, 11:37 AM CDT | Severe Thunderstorm Warning | SGF | 38 min |
| Aug 20, 12:12 PM CDT | Special Weather Statement | SGF | 48 min |
| Aug 20, 12:51 PM CDT | Severe Thunderstorm Warning | SGF | 24 min |
| Aug 20, 1:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Sep 18, 10:36 PM CDT | Dense Fog Advisory | SGF | 10 hr |
| Oct 9, 5:35 AM CDT | Dense Fog Advisory | SGF | 5 hr |
| Oct 22, 3:11 AM CDT | Severe Thunderstorm Warning | SGF | 64 min |
| Oct 22, 4:57 AM CDT | Mesoscale Discussion | SPC | 93 min |
| Oct 26, 3:23 AM CDT | Freeze Watch | SGF | 24 hr |
| Oct 27, 3:07 AM CDT | Freeze Warning | SGF | 31 hr |
| Oct 27, 3:07 AM CDT | Freeze Warning | SGF | 54 hr |
| Nov 1, 6:10 PM CDT | Dense Fog Advisory | SGF | 15 hr |
| Nov 5, 2:51 PM CST | Mesoscale Discussion | SPC | 114 min |
| Nov 6, 10:43 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Nov 17, 2:52 PM CST | Wind Advisory | SGF | 26 hr |
| Dec 11, 3:35 AM CST | Red Flag Warning | PAH | 14 hr |
| Dec 29, 3:35 PM CST | Wind Chill Advisory | SGF | 4 days |
| Dec 30, 6:07 AM CST | Winter Weather Advisory | SGF | 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 | 22 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 28 |
| Special Weather Statement | 6 |
| Flooding | |
| Areal Flood Warning | 11 |
| Flash Flood Warning | 5 |
| River Flood Warning | 7 |
| Flash Flood Watch | 4 |
| Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Ice Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.