Alert archive / Kansas / Nemaha County
Weather alerts in Nemaha County, Kansas, 2018
133 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Nemaha County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 133
- Warnings
- 37
- Watches
- 14
- Advisories
- 31
- Busiest month
- June34 alerts
- Busiest day
- June 12, 201812 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 3 tornado warnings covering Nemaha County in 2018 had a tornado report inside them.
Nemaha County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 26 | 19 | 27% | 12 | 83% | 26 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Topeka, KS: tornado warnings | 28 | 9 | 68% | 20 | 80% | 20 min |
| NWS Topeka, KS: severe thunderstorm warnings | 252 | 128 | 49% | 305 | 81% | 26 min |
| NWS Topeka, KS: flash flood warnings | 26 | 19 | 27% | 37 | 95% | 102 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 6, 8:47 PM CST | Winter Weather Advisory | TOP | 12 hr |
| Jan 10, 3:48 AM CST | Winter Weather Advisory | TOP | 32 hr |
| Jan 11, 3:31 AM CST | Winter Storm Warning | TOP | 8 hr |
| Jan 11, 4:20 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 13, 12:44 PM CST | Winter Weather Advisory | TOP | 21 hr |
| Jan 14, 3:14 PM CST | Wind Chill Advisory | TOP | 45 hr |
| Jan 21, 1:06 AM CST | Dense Fog Advisory | TOP | 11 hr |
| Jan 21, 2:57 PM CST | Winter Weather Advisory | TOP | 27 hr |
| Jan 26, 3:44 AM CST | Wind Advisory | TOP | 14 hr |
| Feb 4, 9:30 AM CST | Winter Weather Advisory | TOP | 5 hr |
| Feb 5, 2:55 PM CST | Winter Weather Advisory | TOP | 30 hr |
| Feb 10, 3:31 AM CST | Winter Weather Advisory | TOP | 24 hr |
| Feb 18, 2:55 AM CST | Wind Advisory | TOP | 15 hr |
| Feb 19, 3:45 AM CST | Winter Weather Advisory | TOP | 32 hr |
| Feb 19, 11:25 PM CST | Special Weather Statement | TOP | 35 min |
| Feb 20, 12:02 AM CST | Special Weather Statement | TOP | 28 min |
| Feb 20, 3:17 PM CST | Winter Weather Advisory | TOP | 57 hr |
| Feb 23, 1:51 PM CST | Winter Weather Advisory | TOP | 24 hr |
| Mar 5, 3:24 AM CST | Wind Advisory | TOP | 15 hr |
| Mar 5, 3:51 AM CST | Wind Advisory | TOP | 39 hr |
| Mar 14, 3:40 AM CDT | Red Flag Warning | TOP | 15 hr |
| Mar 26, 2:37 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 26, 5:24 AM CDT | Special Weather Statement | TOP | 51 min |
| Mar 26, 5:42 AM CDT | Special Weather Statement | TOP | 33 min |
| Mar 31, 3:10 AM CDT | Winter Weather Advisory | TOP | 38 hr |
| Apr 13, 2:06 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 13, 3:18 PM CDT | Severe Thunderstorm Warning | TOP | 57 min |
| Apr 13, 3:31 PM CDT | Severe Thunderstorm Warning | TOP | 44 min |
| Apr 13, 4:09 PM CDT | Severe Thunderstorm Warning | TOP | 51 min |
| Apr 13, 4:11 PM CDT | Severe Thunderstorm Warning | TOP | 34 min |
| Apr 29, 3:34 AM CDT | Wind Advisory | TOP | 41 hr |
| May 1, 2:47 PM CDT | Tornado Watch | SPC | 9 hr |
| May 1, 5:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 7:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 9:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| May 1, 10:27 PM CDT | Tornado Warning | TOP | 33 min |
| May 2, 12:43 PM CDT | Tornado Watch | SPC | 9 hr |
| May 2, 5:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| May 2, 5:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| May 2, 6:03 PM CDT | Severe Thunderstorm Warning | TOP | 57 min |
| May 2, 9:20 PM CDT | Special Weather Statement | TOP | 40 min |
| May 3, 2:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| May 3, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 3, 5:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| May 3, 6:14 PM CDT | Severe Thunderstorm Warning | TOP | 46 min |
| May 3, 6:57 PM CDT | Severe Thunderstorm Warning | TOP | 33 min |
| May 3, 7:43 PM CDT | Mesoscale Discussion | SPC | 62 min |
| May 13, 8:00 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 16, 7:33 PM CDT | Severe Thunderstorm Warning | TOP | 27 min |
| May 18, 2:59 PM CDT | Special Weather Statement | TOP | 16 min |
| May 19, 1:42 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 29, 2:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 29, 2:40 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 29, 5:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| May 29, 9:03 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Jun 2, 12:50 AM CDT | Mesoscale Discussion | SPC | 55 min |
| Jun 2, 2:08 AM CDT | Special Weather Statement | TOP | 52 min |
| Jun 6, 8:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 7, 12:25 AM CDT | Special Weather Statement | TOP | 35 min |
| Jun 9, 6:41 PM CDT | Severe Thunderstorm Warning | TOP | 49 min |
| Jun 9, 7:29 PM CDT | Severe Thunderstorm Warning | TOP | 16 min |
| Jun 11, 6:12 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 11, 8:01 PM CDT | Severe Thunderstorm Warning | TOP | 59 min |
| Jun 11, 8:15 PM CDT | Severe Thunderstorm Warning | TOP | 60 min |
| Jun 11, 8:42 PM CDT | Tornado Warning | TOP | 48 min |
| Jun 11, 8:57 PM CDT | Severe Thunderstorm Warning | TOP | 48 min |
| Jun 11, 9:03 PM CDT | Tornado Warning | TOP | 27 min |
| Jun 11, 9:11 PM CDT | Severe Thunderstorm Warning | TOP | 64 min |
| Jun 11, 9:20 PM CDT | Severe Thunderstorm Warning | TOP | 55 min |
| Jun 11, 9:26 PM CDT | Severe Thunderstorm Warning | TOP | 49 min |
| Jun 11, 9:43 PM CDT | Severe Thunderstorm Warning | TOP | 32 min |
| Jun 11, 10:09 PM CDT | Areal Flood Advisory | TOP | 3 hr |
| Jun 11, 10:09 PM CDT | Severe Thunderstorm Warning | TOP | 66 min |
| Jun 11, 10:16 PM CDT | Severe Thunderstorm Warning | TOP | 59 min |
| Jun 14, 2:53 PM CDT | Heat Advisory | TOP | 4 days |
| Jun 18, 2:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 18, 5:03 PM CDT | Special Weather Statement | TOP | 27 min |
| Jun 18, 5:18 PM CDT | Areal Flood Advisory | TOP | 117 min |
| Jun 18, 5:47 PM CDT | Flash Flood Warning | TOP | 3 hr |
| Jun 20, 8:28 PM CDT | Special Weather Statement | TOP | 32 min |
| Jun 25, 3:38 PM CDT | Heat Advisory | TOP | 5 days |
| Jun 27, 12:13 PM CDT | Excessive Heat Warning | TOP | 3 days |
| Jun 30, 4:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 30, 4:53 PM CDT | Severe Thunderstorm Warning | TOP | 52 min |
| Jun 30, 4:57 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 30, 5:27 PM CDT | Severe Thunderstorm Warning | TOP | 33 min |
| Jun 30, 5:37 PM CDT | Severe Thunderstorm Warning | TOP | 38 min |
| Jun 30, 5:56 PM CDT | Severe Thunderstorm Warning | TOP | 19 min |
| Jun 30, 6:02 PM CDT | Severe Thunderstorm Warning | TOP | 58 min |
| Jun 30, 8:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 30, 10:30 PM CDT | Special Weather Statement | TOP | 30 min |
| Jul 2, 3:04 PM CDT | Heat Advisory | TOP | 53 hr |
| Jul 9, 2:29 PM CDT | Heat Advisory | TOP | 5 days |
| Jul 13, 3:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 19, 12:47 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 19, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 19, 3:52 AM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 6, 5:44 PM CDT | Special Weather Statement | TOP | 31 min |
| Aug 6, 6:24 PM CDT | Severe Thunderstorm Warning | TOP | 37 min |
| Aug 6, 6:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 16, 3:12 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Aug 28, 9:42 AM CDT | Special Weather Statement | TOP | 33 min |
| Aug 28, 10:00 AM CDT | Special Weather Statement | TOP | 45 min |
| Aug 28, 1:50 PM CDT | Special Weather Statement | TOP | 25 min |
| Aug 28, 2:29 PM CDT | Special Weather Statement | TOP | 31 min |
| Aug 28, 9:59 PM CDT | Special Weather Statement | TOP | 31 min |
| Aug 31, 1:10 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 2, 3:27 AM CDT | Flash Flood Watch | TOP | 34 hr |
| Sep 2, 3:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Sep 2, 4:58 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 3, 1:06 PM CDT | Flash Flood Watch | TOP | 48 hr |
| Sep 20, 2:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 20, 3:11 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 20, 8:12 PM CDT | Severe Thunderstorm Warning | TOP | 63 min |
| Sep 20, 8:55 PM CDT | Special Weather Statement | TOP | 50 min |
| Oct 1, 2:21 AM CDT | Dense Fog Advisory | TOP | 8 hr |
| Oct 3, 6:50 PM CDT | Wind Advisory | TOP | 3 hr |
| Oct 5, 2:39 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 6, 4:09 PM CDT | Flood Watch | TOP | 3 days |
| Oct 8, 1:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Oct 13, 1:12 AM CDT | Dense Fog Advisory | TOP | 9 hr |
| Oct 13, 3:46 AM CDT | Winter Weather Advisory | TOP | 46 hr |
| Oct 13, 2:37 PM CDT | Freeze Watch | TOP | 14 hr |
| Oct 14, 4:07 AM CDT | Freeze Warning | TOP | 30 hr |
| Oct 15, 3:56 AM CDT | Freeze Warning | TOP | 29 hr |
| Nov 7, 3:22 AM CST | Winter Weather Advisory | TOP | 42 hr |
| Nov 17, 8:45 PM CST | Winter Weather Advisory | TOP | 7 hr |
| Nov 23, 3:06 AM CST | Winter Storm Watch | TOP | 25 hr |
| Nov 24, 4:01 AM CST | Winter Storm Warning | TOP | 10 hr |
| Nov 24, 1:38 PM CST | Blizzard Warning | TOP | 28 hr |
| Nov 25, 3:54 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Nov 25, 10:59 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 1, 10:00 AM CST | Winter Weather Advisory | TOP | 29 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 | 26 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 33 |
| Special Weather Statement | 18 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 15 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.