Alert archive / Colorado / Sedgwick County
Weather alerts in Sedgwick County, Colorado, 2018
118 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sedgwick County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 118
- Warnings
- 32
- Watches
- 25
- Advisories
- 15
- Busiest month
- June28 alerts
- Busiest day
- June 17, 20188 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 2 tornado warnings covering Sedgwick County in 2018 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 7 minutes after it went out.
Sedgwick County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 1 | 100% | 7 min |
| Severe thunderstorm warnings | 17 | 6 | 65% | 13 | 77% | 19 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Denver/Boulder, CO: tornado warnings | 52 | 11 | 79% | 36 | 53% | 12 min |
| NWS Denver/Boulder, CO: severe thunderstorm warnings | 322 | 114 | 65% | 369 | 75% | 20 min |
| NWS Denver/Boulder, CO: flash flood warnings | 13 | 3 | 77% | 14 | 79% | 32 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 1, 5:26 PM MST | Wind Chill Advisory | BOU | 9 hr |
| Jan 15, 4:15 AM MST | Wind Chill Advisory | BOU | 29 hr |
| Jan 19, 1:54 PM MST | Winter Storm Watch | BOU | 16 hr |
| Jan 20, 5:24 AM MST | Winter Storm Warning | BOU | 36 hr |
| Jan 21, 4:15 AM MST | Blizzard Warning | BOU | 20 hr |
| Jan 21, 11:59 PM MST | Winter Weather Advisory | BOU | 5 hr |
| Feb 19, 11:42 PM MST | Wind Chill Advisory | BOU | 8 hr |
| Feb 22, 3:37 PM MST | Winter Storm Watch | BOU | 12 hr |
| Feb 23, 3:13 AM MST | Winter Weather Advisory | BOU | 27 hr |
| Mar 3, 2:22 PM MST | High Wind Watch | BOU | 15 hr |
| Mar 3, 3:17 PM MST | Fire Weather Watch | BOU | 19 hr |
| Mar 4, 5:22 AM MST | High Wind Warning | BOU | 36 hr |
| Mar 4, 9:49 AM MST | Red Flag Warning | BOU | 32 hr |
| Mar 6, 3:48 AM MST | High Wind Warning | BOU | 11 hr |
| Mar 15, 3:45 AM MDT | Winter Weather Advisory | BOU | 25 hr |
| Mar 31, 11:42 PM MDT | Winter Weather Advisory | BOU | 9 hr |
| Apr 1, 2:29 PM MDT | High Wind Watch | BOU | 23 hr |
| Apr 2, 1:46 PM MDT | High Wind Warning | BOU | 21 hr |
| Apr 10, 3:44 AM MDT | Red Flag Warning | BOU | 39 hr |
| Apr 11, 2:59 PM MDT | High Wind Watch | BOU | 19 hr |
| Apr 12, 4:29 AM MDT | Winter Storm Watch | BOU | 5 hr |
| Apr 12, 9:51 AM MDT | Blizzard Warning | BOU | 43 hr |
| Apr 16, 2:16 PM MDT | High Wind Watch | BOU | 18 hr |
| Apr 17, 4:58 AM MDT | High Wind Warning | BOU | 16 hr |
| May 10, 12:56 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 1:41 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 10, 4:41 PM MDT | Severe Thunderstorm Warning | BOU | 17 min |
| May 10, 5:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 9:56 PM MDT | Special Weather Statement | BOU | 19 min |
| May 10, 10:17 PM MDT | Severe Thunderstorm Warning | BOU | 12 min |
| May 11, 10:58 PM MDT | Dense Fog Advisory | BOU | 10 hr |
| May 14, 7:01 PM MDT | Severe Thunderstorm Warning | BOU | 44 min |
| May 17, 4:19 PM MDT | Mesoscale Discussion | SPC | 116 min |
| May 17, 4:57 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 17, 6:47 PM MDT | Mesoscale Discussion | SPC | 58 min |
| May 17, 9:03 PM MDT | Mesoscale Discussion | SPC | 117 min |
| May 18, 11:02 AM MDT | Flash Flood Watch | BOU | 30 hr |
| May 23, 1:31 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 23, 5:07 PM MDT | Mesoscale Discussion | SPC | 83 min |
| May 27, 1:13 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 27, 4:30 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 6:09 PM MDT | Severe Thunderstorm Warning | BOU | 33 min |
| May 27, 6:19 PM MDT | Severe Thunderstorm Warning | BOU | 26 min |
| May 28, 2:38 PM MDT | Flash Flood Watch | BOU | 6 hr |
| May 29, 2:10 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 6, 2:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jun 6, 4:46 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 6, 5:27 PM MDT | Severe Thunderstorm Warning | BOU | 48 min |
| Jun 6, 6:10 PM MDT | Severe Thunderstorm Warning | BOU | 35 min |
| Jun 6, 6:50 PM MDT | Severe Thunderstorm Warning | BOU | 40 min |
| Jun 6, 6:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 7:09 PM MDT | Areal Flood Advisory | BOU | 111 min |
| Jun 15, 4:47 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jun 17, 1:05 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 17, 1:35 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 17, 1:40 PM MDT | Special Weather Statement | BOU | 35 min |
| Jun 17, 1:44 PM MDT | Severe Thunderstorm Warning | BOU | 31 min |
| Jun 17, 1:51 PM MDT | Tornado Warning | BOU | 24 min |
| Jun 17, 2:13 PM MDT | Tornado Warning | BOU | 17 min |
| Jun 17, 3:53 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jun 17, 5:47 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jun 19, 11:48 AM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 19, 12:25 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 19, 1:54 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 4:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 6:21 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Jun 23, 8:21 PM MDT | Special Weather Statement | BOU | 54 min |
| Jun 23, 8:32 PM MDT | Severe Thunderstorm Warning | BOU | 58 min |
| Jun 24, 1:16 AM MDT | Mesoscale Discussion | SPC | 59 min |
| Jun 24, 12:51 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 30, 1:03 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jun 30, 2:03 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 4:40 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 4:10 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 3, 6:36 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Jul 3, 7:57 PM MDT | Severe Thunderstorm Warning | BOU | 33 min |
| Jul 4, 1:51 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Jul 12, 1:47 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 11:05 PM MDT | Special Weather Statement | BOU | 40 min |
| Jul 16, 11:18 PM MDT | Severe Thunderstorm Warning | BOU | 42 min |
| Jul 16, 11:36 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jul 17, 3:09 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 17, 5:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jul 18, 4:16 AM MDT | Special Weather Statement | BOU | 29 min |
| Jul 26, 1:49 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 26, 6:07 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 27, 12:35 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jul 27, 1:04 PM MDT | Tornado Watch | SPC | 8 hr |
| Jul 27, 1:53 PM MDT | Severe Thunderstorm Warning | BOU | 52 min |
| Jul 28, 5:01 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jul 28, 5:40 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 28, 7:50 PM MDT | Severe Thunderstorm Warning | BOU | 40 min |
| Jul 29, 12:46 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Jul 29, 1:07 PM MDT | Tornado Watch | SPC | 8 hr |
| Jul 29, 5:23 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Aug 4, 1:58 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Aug 5, 12:06 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 5, 2:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Aug 5, 3:22 PM MDT | Severe Thunderstorm Warning | BOU | 38 min |
| Aug 5, 4:05 PM MDT | Severe Thunderstorm Warning | BOU | 40 min |
| Aug 18, 2:26 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 26, 5:27 PM MDT | Special Weather Statement | BOU | 33 min |
| Aug 26, 5:47 PM MDT | Severe Thunderstorm Warning | BOU | 28 min |
| Sep 1, 4:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Sep 11, 4:25 PM MDT | Special Weather Statement | BOU | 35 min |
| Sep 19, 10:26 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Sep 20, 3:19 PM MDT | Special Weather Statement | BOU | 56 min |
| Oct 8, 3:01 PM MDT | Freeze Warning | BOU | 13 hr |
| Oct 9, 4:25 AM MDT | Freeze Warning | BOU | 30 hr |
| Oct 10, 2:27 PM MDT | Freeze Warning | BOU | 19 hr |
| Oct 12, 2:20 PM MDT | Winter Weather Advisory | BOU | 49 hr |
| Nov 7, 3:47 AM MST | Winter Weather Advisory | BOU | 22 hr |
| Nov 16, 10:36 AM MST | Winter Weather Advisory | BOU | 34 hr |
| Nov 22, 3:49 PM MST | Winter Weather Advisory | BOU | 61 hr |
| Nov 24, 5:39 AM MST | High Wind Warning | BOU | 19 hr |
| Nov 30, 3:33 AM MST | Winter Weather Advisory | BOU | 39 hr |
| Dec 25, 4:53 AM MST | Winter Storm Watch | BOU | 23 hr |
| Dec 26, 4:21 AM MST | Winter Weather Advisory | BOU | 14 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 | 17 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 38 |
| Special Weather Statement | 8 |
| Flooding | |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 1 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 10 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 4 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
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.