Alert archive / Kansas / Lyon County
Weather alerts in Lyon County, Kansas, 2009
180 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lyon County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 180
- Warnings
- 71
- Watches
- 30
- Advisories
- 25
- Busiest month
- June38 alerts
- Busiest day
- June 16, 200915 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lyon County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 31 | 21 | 32% | 34 | 82% | 20 min |
| Flash flood warnings | 8 | 3 | 63% | 2 | 100% | 52 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Topeka, KS: tornado warnings | 21 | 6 | 71% | 8 | 75% | 13 min |
| NWS Topeka, KS: severe thunderstorm warnings | 227 | 147 | 35% | 451 | 82% | 23 min |
| NWS Topeka, KS: flash flood warnings | 34 | 14 | 59% | 29 | 69% | 67 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 2, 10:37 PM CST | Dense Fog Advisory | TOP | 9 hr |
| Jan 11, 3:12 PM CST | Wind Advisory | TOP | 31 hr |
| Jan 26, 3:51 AM CST | Winter Weather Advisory | TOP | 32 hr |
| Jan 31, 5:32 AM CST | Red Flag Warning | TOP | 12 hr |
| Feb 6, 2:38 AM CST | Wind Advisory | TOP | 15 hr |
| Feb 8, 3:24 PM CST | Wind Advisory | TOP | 29 hr |
| Feb 9, 8:02 AM CST | Severe Thunderstorm Warning | TOP | 43 min |
| Feb 9, 2:19 PM CST | High Wind Warning | TOP | 4 hr |
| Feb 10, 3:42 PM CST | Wind Advisory | TOP | 11 hr |
| Mar 7, 2:32 PM CST | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 7, 5:57 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 7, 6:41 PM CST | Severe Thunderstorm Warning | TOP | 49 min |
| Mar 7, 6:57 PM CST | Severe Thunderstorm Warning | TOP | 48 min |
| Mar 7, 7:30 PM CST | Severe Thunderstorm Warning | TOP | 60 min |
| Mar 7, 8:27 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 7, 8:42 PM CST | Severe Thunderstorm Warning | TOP | 33 min |
| Mar 7, 9:38 PM CST | Flash Flood Warning | TOP | 112 min |
| Mar 7, 9:51 PM CST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 7, 10:37 PM CST | Severe Thunderstorm Warning | TOP | 23 min |
| Mar 7, 10:53 PM CST | Severe Thunderstorm Warning | TOP | 37 min |
| Mar 7, 11:30 PM CST | Flash Flood Warning | TOP | 60 min |
| Mar 8, 12:43 AM CST | Mesoscale Discussion | SPC | 92 min |
| Mar 9, 5:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Mar 22, 3:52 PM CDT | Wind Advisory | TOP | 21 hr |
| Mar 23, 10:12 AM CDT | High Wind Warning | TOP | 9 hr |
| Mar 23, 1:03 PM CDT | Tornado Watch | SPC | 6 hr |
| Mar 23, 3:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Mar 23, 5:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Mar 23, 6:47 PM CDT | Tornado Watch | SPC | 5 hr |
| Mar 23, 7:07 PM CDT | Wind Advisory | TOP | 5 hr |
| Mar 23, 11:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Mar 23, 11:25 PM CDT | Severe Thunderstorm Warning | TOP | 35 min |
| Mar 23, 11:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Mar 23, 11:43 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 24, 11:02 AM CDT | River Flood Warning | TOP | 9 hr |
| Mar 26, 11:07 AM CDT | Winter Storm Watch | TOP | 18 hr |
| Mar 27, 4:37 AM CDT | Winter Storm Warning | TOP | 38 hr |
| Mar 28, 2:18 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 28, 7:52 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 30, 3:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Apr 4, 11:10 AM CDT | Wind Advisory | TOP | 8 hr |
| Apr 4, 1:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 4, 2:06 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 4, 3:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Apr 4, 9:51 PM CDT | Wind Advisory | TOP | 21 hr |
| Apr 6, 2:07 PM CDT | Freeze Warning | TOP | 19 hr |
| Apr 18, 4:23 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 18, 11:38 PM CDT | Areal Flood Advisory | TOP | 112 min |
| Apr 24, 3:41 AM CDT | Wind Advisory | TOP | 15 hr |
| Apr 25, 3:15 PM CDT | Flood Watch | TOP | 44 hr |
| Apr 25, 3:36 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 25, 3:58 PM CDT | Severe Thunderstorm Warning | TOP | 32 min |
| Apr 25, 5:29 PM CDT | Severe Thunderstorm Warning | TOP | 31 min |
| Apr 25, 6:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 25, 9:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 25, 10:09 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 25, 11:50 PM CDT | High Wind Warning | TOP | 3 hr |
| Apr 26, 2:10 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Apr 26, 10:54 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 26, 11:07 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 26, 2:41 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 26, 5:02 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 26, 6:14 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Apr 26, 7:12 PM CDT | Severe Thunderstorm Warning | TOP | 48 min |
| Apr 26, 7:44 PM CDT | Severe Thunderstorm Warning | TOP | 46 min |
| Apr 26, 8:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 26, 8:30 PM CDT | River Flood Warning | ICT | 3 days |
| Apr 26, 9:21 PM CDT | River Flood Warning | TOP | 4 days |
| Apr 26, 9:21 PM CDT | River Flood Warning | TOP | 25 hr |
| Apr 26, 9:21 PM CDT | River Flood Warning | TOP | 25 hr |
| Apr 26, 9:21 PM CDT | River Flood Warning | TOP | 44 hr |
| Apr 26, 9:21 PM CDT | River Flood Warning | TOP | 5 days |
| Apr 26, 9:36 PM CDT | Flash Flood Warning | TOP | 4 hr |
| Apr 27, 1:27 AM CDT | Areal Flood Warning | TOP | 6 hr |
| Apr 29, 3:57 AM CDT | Flash Flood Watch | TOP | 12 hr |
| May 7, 10:53 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 8, 12:02 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 8, 4:53 AM CDT | Flash Flood Warning | TOP | 4 hr |
| May 8, 7:52 AM CDT | River Flood Warning | ICT | 72 hr |
| May 8, 8:44 AM CDT | Areal Flood Warning | TOP | 8 hr |
| May 8, 9:11 AM CDT | River Flood Warning | TOP | 4 days |
| May 8, 9:11 AM CDT | River Flood Warning | TOP | 5 days |
| May 11, 3:53 AM CDT | Dense Fog Advisory | TOP | 4 hr |
| May 12, 1:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| May 13, 4:35 PM CDT | Severe Thunderstorm Warning | TOP | 25 min |
| May 13, 4:51 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 13, 4:53 PM CDT | Severe Thunderstorm Warning | TOP | 52 min |
| May 13, 5:06 PM CDT | Severe Thunderstorm Warning | TOP | 39 min |
| May 15, 2:44 PM CDT | Mesoscale Discussion | SPC | 31 min |
| May 15, 3:02 PM CDT | Tornado Watch | SPC | 7 hr |
| May 15, 5:04 PM CDT | Severe Thunderstorm Warning | TOP | 26 min |
| May 15, 5:44 PM CDT | Severe Thunderstorm Warning | TOP | 31 min |
| May 15, 5:47 PM CDT | Flash Flood Warning | TOP | 4 hr |
| May 15, 5:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| May 26, 6:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jun 2, 4:13 AM CDT | Flash Flood Watch | TOP | 16 hr |
| Jun 2, 2:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 4:53 PM CDT | Flash Flood Warning | TOP | 3 hr |
| Jun 7, 2:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 7, 3:45 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 7, 7:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 7, 8:51 PM CDT | Severe Thunderstorm Warning | TOP | 39 min |
| Jun 7, 11:09 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 9, 8:40 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Jun 9, 9:02 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 9, 11:11 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 9, 11:46 AM CDT | Severe Thunderstorm Warning | TOP | 44 min |
| Jun 14, 10:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 15, 3:55 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Jun 15, 3:24 PM CDT | Flash Flood Watch | TOP | 15 hr |
| Jun 15, 5:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 15, 6:01 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 15, 7:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 15, 7:50 PM CDT | Severe Thunderstorm Warning | TOP | 40 min |
| Jun 15, 8:30 PM CDT | Severe Thunderstorm Warning | TOP | 45 min |
| Jun 15, 8:48 PM CDT | Severe Thunderstorm Warning | TOP | 32 min |
| Jun 15, 9:17 PM CDT | Severe Thunderstorm Warning | TOP | 34 min |
| Jun 15, 9:19 PM CDT | Severe Thunderstorm Warning | TOP | 41 min |
| Jun 15, 9:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 15, 11:51 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 16, 1:43 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 16, 2:27 AM CDT | River Flood Warning | ICT | 31 hr |
| Jun 16, 2:58 AM CDT | Severe Thunderstorm Warning | TOP | 40 min |
| Jun 16, 4:10 AM CDT | River Flood Warning | TOP | 58 hr |
| Jun 16, 4:10 AM CDT | River Flood Warning | TOP | 5 hr |
| Jun 16, 4:10 AM CDT | River Flood Warning | TOP | 30 hr |
| Jun 16, 4:15 AM CDT | Areal Flood Advisory | TOP | 2 hr |
| Jun 20, 5:18 PM CDT | Areal Flood Advisory | TOP | 43 min |
| Jun 20, 6:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 21, 9:35 PM CDT | Heat Advisory | TOP | 39 hr |
| Jun 23, 12:56 PM CDT | Excessive Heat Warning | TOP | 4 days |
| Jun 24, 4:33 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 24, 7:40 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jul 3, 1:37 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 11:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jul 8, 2:59 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Jul 10, 12:44 AM CDT | Mesoscale Discussion | SPC | 31 min |
| Jul 10, 5:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 12, 4:48 AM CDT | Mesoscale Discussion | SPC | 57 min |
| Jul 12, 5:46 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 12, 7:58 AM CDT | Mesoscale Discussion | SPC | 62 min |
| Jul 13, 3:45 PM CDT | Heat Advisory | TOP | 27 hr |
| Jul 14, 3:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 20, 7:43 PM CDT | Severe Thunderstorm Warning | TOP | 47 min |
| Jul 20, 8:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 21, 2:11 AM CDT | River Flood Warning | ICT | 13 hr |
| Jul 21, 9:15 AM CDT | River Flood Warning | TOP | 28 hr |
| Jul 27, 7:18 PM CDT | Severe Thunderstorm Warning | TOP | 27 min |
| Jul 28, 2:50 PM CDT | Areal Flood Advisory | TOP | 115 min |
| Aug 10, 9:21 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 11:29 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 10, 12:08 PM CDT | Severe Thunderstorm Warning | TOP | 52 min |
| Aug 10, 12:51 PM CDT | Severe Thunderstorm Warning | TOP | 54 min |
| Aug 10, 1:31 PM CDT | Severe Thunderstorm Warning | TOP | 59 min |
| Aug 15, 5:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 16, 6:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Aug 17, 1:22 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 19, 7:11 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 19, 10:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 26, 8:59 PM CDT | Severe Thunderstorm Warning | TOP | 46 min |
| Aug 26, 9:45 PM CDT | Flash Flood Warning | TOP | 2 hr |
| Aug 26, 11:41 PM CDT | Flash Flood Warning | TOP | 2 hr |
| Sep 5, 10:14 PM CDT | Dense Fog Advisory | TOP | 12 hr |
| Sep 8, 3:24 PM CDT | Flash Flood Watch | TOP | 24 hr |
| Sep 9, 6:22 AM CDT | Areal Flood Warning | TOP | 10 hr |
| Sep 9, 1:27 PM CDT | River Flood Warning | TOP | 19 hr |
| Oct 1, 1:47 PM CDT | Wind Advisory | TOP | 29 hr |
| Oct 8, 2:01 PM CDT | Areal Flood Warning | TOP | 6 hr |
| Oct 9, 3:26 PM CDT | Frost Advisory | TOP | 19 hr |
| Oct 10, 4:02 AM CDT | Freeze Warning | TOP | 22 hr |
| Nov 15, 3:25 PM CST | Winter Weather Advisory | TOP | 36 hr |
| Nov 19, 4:05 AM CST | Dense Fog Advisory | TOP | 5 hr |
| Dec 7, 3:08 AM CST | Winter Storm Warning | TOP | 51 hr |
| Dec 7, 3:01 PM CST | Winter Weather Advisory | TOP | 45 hr |
| Dec 8, 11:22 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 21, 4:05 AM CST | Winter Storm Watch | TOP | 59 hr |
| Dec 23, 2:56 PM CST | Winter Storm Warning | TOP | 24 hr |
| Dec 24, 3:33 AM CST | Winter Weather Advisory | TOP | 48 hr |
| Dec 24, 1:32 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 24, 3:13 PM CST | Blizzard Warning | TOP | 16 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 | 31 |
| Severe Thunderstorm Watch | 15 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 54 |
| Flooding | |
| Areal Flood Warning | 4 |
| Flash Flood Warning | 8 |
| River Flood Warning | 17 |
| Flash Flood Watch | 4 |
| Flood Watch | 1 |
| Areal Flood Advisory | 4 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 4 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 2 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 3 |
| Wind Advisory | 10 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
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.