Alert archive / Kansas / Jefferson County
Weather alerts in Jefferson County, Kansas, 2020
139 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 139
- Warnings
- 28
- Watches
- 20
- Advisories
- 45
- Busiest month
- July24 alerts
- Busiest day
- April 12, 20208 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Jefferson County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 6 | 14% | 11 | 73% | 11 min |
| Flash flood warnings | 6 | 3 | 50% | 3 | 33% | 118 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Topeka, KS: tornado warnings | 9 | 1 | 89% | 2 | 50% | 0 min |
| NWS Topeka, KS: severe thunderstorm warnings | 167 | 88 | 47% | 220 | 88% | 24 min |
| NWS Topeka, KS: flash flood warnings | 39 | 20 | 49% | 50 | 94% | 78 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, 3:15 PM CST | Winter Storm Watch | TOP | 13 hr |
| Jan 10, 4:15 AM CST | Winter Storm Warning | TOP | 34 hr |
| Jan 10, 4:15 AM CST | Winter Weather Advisory | TOP | 34 hr |
| Jan 10, 12:54 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 12, 12:47 PM CST | Winter Weather Advisory | TOP | 7 hr |
| Jan 12, 8:28 PM CST | Dense Fog Advisory | TOP | 15 hr |
| Jan 13, 5:55 PM CST | Dense Fog Advisory | TOP | 18 hr |
| Jan 15, 3:14 PM CST | Winter Weather Advisory | TOP | 47 hr |
| Jan 17, 3:20 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 21, 3:27 PM CST | Winter Weather Advisory | TOP | 21 hr |
| Jan 23, 3:27 AM CST | Winter Weather Advisory | TOP | 27 hr |
| Jan 29, 4:13 AM CST | Winter Weather Advisory | TOP | 3 hr |
| Feb 3, 3:50 PM CST | Winter Weather Advisory | TOP | 45 hr |
| Feb 11, 2:59 PM CST | Winter Weather Advisory | TOP | 33 hr |
| Feb 12, 3:33 AM CST | Wind Chill Advisory | TOP | 30 hr |
| Mar 4, 2:21 PM CST | Fire Weather Watch | TOP | 5 hr |
| Mar 4, 7:24 PM CST | Red Flag Warning | TOP | 23 hr |
| Mar 6, 2:44 PM CST | Fire Weather Watch | TOP | 12 hr |
| Mar 7, 3:06 AM CST | Red Flag Warning | TOP | 16 hr |
| Mar 7, 9:44 PM CST | Fire Weather Watch | TOP | 9 min |
| Mar 8, 3:37 AM CDT | Wind Advisory | TOP | 15 hr |
| Mar 8, 3:41 AM CDT | Fire Weather Watch | TOP | 7 hr |
| Mar 19, 2:41 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 22, 11:27 PM CDT | Dense Fog Advisory | TOP | 12 hr |
| Mar 26, 9:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Mar 26, 10:27 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 27, 3:40 PM CDT | Wind Advisory | TOP | 28 hr |
| Apr 2, 3:47 AM CDT | Winter Weather Advisory | TOP | 34 hr |
| Apr 3, 3:18 PM CDT | Freeze Warning | TOP | 18 hr |
| Apr 9, 2:27 AM CDT | Freeze Warning | TOP | 31 hr |
| Apr 11, 4:04 PM CDT | Wind Advisory | TOP | 33 hr |
| Apr 11, 5:35 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 11, 7:56 PM CDT | Severe Thunderstorm Warning | TOP | 49 min |
| Apr 11, 8:03 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Apr 11, 8:04 PM CDT | Severe Thunderstorm Warning | TOP | 26 min |
| Apr 11, 9:17 PM CDT | Special Weather Statement | TOP | 43 min |
| Apr 11, 11:20 PM CDT | Severe Thunderstorm Warning | TOP | 40 min |
| Apr 12, 4:19 AM CDT | Freeze Warning | TOP | 30 hr |
| Apr 12, 10:51 AM CDT | Special Weather Statement | TOP | 24 min |
| Apr 12, 11:14 AM CDT | Special Weather Statement | TOP | 31 min |
| Apr 13, 3:37 AM CDT | Freeze Warning | TOP | 30 hr |
| Apr 14, 3:46 PM CDT | Freeze Warning | TOP | 17 hr |
| Apr 16, 3:50 AM CDT | Freeze Warning | TOP | 29 hr |
| Apr 17, 2:37 PM CDT | Freeze Warning | TOP | 18 hr |
| Apr 28, 7:54 PM CDT | Special Weather Statement | TOP | 51 min |
| Apr 28, 8:43 PM CDT | Special Weather Statement | TOP | 62 min |
| Apr 29, 3:44 AM CDT | Wind Advisory | TOP | 15 hr |
| May 4, 6:33 AM CDT | Severe Thunderstorm Watch | SPC | 12 hr |
| May 4, 8:56 AM CDT | Special Weather Statement | TOP | 49 min |
| May 4, 9:00 AM CDT | Mesoscale Discussion | SPC | 90 min |
| May 4, 9:06 AM CDT | Severe Thunderstorm Warning | TOP | 54 min |
| May 4, 10:34 AM CDT | Special Weather Statement | TOP | 26 min |
| May 4, 10:38 AM CDT | Mesoscale Discussion | SPC | 97 min |
| May 4, 10:46 AM CDT | Areal Flood Advisory | TOP | 3 hr |
| May 8, 2:21 PM CDT | Frost Advisory | TOP | 17 hr |
| May 10, 2:29 PM CDT | Frost Advisory | TOP | 13 hr |
| May 14, 3:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 14, 4:24 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 14, 6:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| May 14, 8:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 22, 10:10 AM CDT | Special Weather Statement | TOP | 35 min |
| May 22, 10:45 AM CDT | Special Weather Statement | TOP | 60 min |
| May 24, 3:42 AM CDT | Flash Flood Watch | TOP | 56 hr |
| May 24, 1:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| May 24, 1:40 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 25, 1:11 PM CDT | Special Weather Statement | TOP | 34 min |
| May 25, 1:24 PM CDT | Special Weather Statement | TOP | 36 min |
| May 25, 1:54 PM CDT | Special Weather Statement | TOP | 36 min |
| May 27, 1:11 PM CDT | Areal Flood Warning | TOP | 20 hr |
| Jun 3, 8:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 9:38 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 3, 10:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 4, 12:54 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 4, 1:02 AM CDT | Special Weather Statement | TOP | 58 min |
| Jun 4, 11:32 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 5, 1:59 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 5, 2:14 AM CDT | Special Weather Statement | TOP | 46 min |
| Jun 5, 2:58 PM CDT | Heat Advisory | TOP | 28 hr |
| Jun 8, 3:40 PM CDT | High Wind Watch | TOP | 12 hr |
| Jun 9, 3:31 AM CDT | Wind Advisory | TOP | 32 hr |
| Jun 9, 6:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 18, 6:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 6:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 8:10 PM CDT | Special Weather Statement | TOP | 50 min |
| Jun 26, 7:50 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 27, 1:28 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 2:02 AM CDT | Special Weather Statement | TOP | 28 min |
| Jun 27, 2:50 AM CDT | Areal Flood Advisory | TOP | 3 hr |
| Jun 27, 4:18 AM CDT | Areal Flood Advisory | TOP | 3 hr |
| Jun 29, 2:57 PM CDT | Heat Advisory | TOP | 29 hr |
| Jul 3, 2:29 PM CDT | Areal Flood Advisory | TOP | 3 hr |
| Jul 3, 3:11 PM CDT | Flash Flood Warning | TOP | 94 min |
| Jul 9, 1:09 AM CDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jul 9, 2:09 AM CDT | Severe Thunderstorm Warning | TOP | 66 min |
| Jul 9, 3:10 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 3:19 AM CDT | Severe Thunderstorm Warning | TOP | 56 min |
| Jul 11, 12:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 11, 1:35 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 11, 2:34 PM CDT | Severe Thunderstorm Warning | TOP | 41 min |
| Jul 14, 3:12 AM CDT | Heat Advisory | TOP | 17 hr |
| Jul 16, 3:05 PM CDT | Heat Advisory | TOP | 53 hr |
| Jul 19, 3:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 6:46 AM CDT | Special Weather Statement | TOP | 29 min |
| Jul 20, 7:12 AM CDT | Special Weather Statement | TOP | 63 min |
| Jul 21, 12:38 AM CDT | Flash Flood Warning | TOP | 4 hr |
| Jul 21, 4:23 AM CDT | Areal Flood Warning | TOP | 3 hr |
| Jul 26, 3:45 AM CDT | Heat Advisory | TOP | 15 hr |
| Jul 29, 10:04 AM CDT | Flash Flood Watch | TOP | 41 hr |
| Jul 29, 3:56 PM CDT | Areal Flood Advisory | TOP | 2 hr |
| Jul 29, 4:39 PM CDT | Flash Flood Warning | TOP | 4 hr |
| Jul 30, 1:25 PM CDT | Flash Flood Warning | TOP | 3 hr |
| Jul 30, 4:38 PM CDT | Areal Flood Warning | TOP | 3 hr |
| Jul 30, 5:12 PM CDT | Flash Flood Warning | TOP | 6 hr |
| Jul 30, 5:35 PM CDT | Flash Flood Warning | TOP | 6 hr |
| Aug 7, 3:26 PM CDT | Heat Advisory | TOP | 29 hr |
| Aug 9, 3:18 AM CDT | Heat Advisory | TOP | 17 hr |
| Aug 31, 4:34 AM CDT | Special Weather Statement | TOP | 26 min |
| Aug 31, 4:56 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 2, 5:04 AM CDT | Dense Fog Advisory | TOP | 4 hr |
| Sep 27, 10:53 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Oct 11, 3:35 AM CDT | Wind Advisory | TOP | 25 hr |
| Oct 15, 2:49 PM CDT | Frost Advisory | TOP | 18 hr |
| Oct 16, 3:01 PM CDT | Wind Advisory | TOP | 24 hr |
| Oct 21, 2:46 PM CDT | Dense Fog Advisory | TOP | 19 hr |
| Oct 21, 2:46 PM CDT | Wind Advisory | TOP | 26 hr |
| Oct 22, 3:38 AM CDT | Freeze Watch | TOP | 23 hr |
| Oct 23, 2:50 AM CDT | Freeze Warning | TOP | 31 hr |
| Oct 25, 3:19 AM CDT | Winter Weather Advisory | TOP | 60 hr |
| Oct 27, 11:01 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 14, 3:33 AM CST | Wind Advisory | TOP | 22 hr |
| Nov 17, 2:32 PM CST | Fire Weather Watch | TOP | 12 hr |
| Nov 17, 2:42 PM CST | Wind Advisory | TOP | 27 hr |
| Nov 18, 2:07 AM CST | Red Flag Warning | TOP | 22 hr |
| Dec 18, 2:17 AM CST | Wind Advisory | TOP | 14 hr |
| Dec 22, 2:56 AM CST | Wind Advisory | TOP | 20 hr |
| Dec 22, 2:33 PM CST | Wind Advisory | TOP | 27 hr |
| Dec 28, 3:19 AM CST | Winter Weather Advisory | TOP | 39 hr |
| Dec 29, 4:00 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 29, 10:02 AM CST | Mesoscale Discussion | SPC | 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 | 7 |
| Severe Thunderstorm Watch | 10 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 19 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 6 |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 5 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 7 |
| Cold | |
| Freeze Warning | 8 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 13 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.