Alert archive / Missouri / DeKalb County
Weather alerts in DeKalb County, Missouri, 2017
99 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
DeKalb County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 99
- Warnings
- 24
- Watches
- 22
- Advisories
- 23
- Busiest month
- June20 alerts
- Busiest day
- June 17, 20178 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 DeKalb County in 2017 had a tornado report inside them.
DeKalb County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 0 | ||
| Severe thunderstorm warnings | 8 | 5 | 38% | 1 | 100% | 6 min |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Kansas City, MO: tornado warnings | 40 | 15 | 63% | 40 | 53% | 11 min |
| NWS Kansas City, MO: severe thunderstorm warnings | 220 | 136 | 38% | 750 | 69% | 22 min |
| NWS Kansas City, MO: flash flood warnings | 40 | 28 | 30% | 117 | 96% | 135 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, 5:43 PM CST | Dense Fog Advisory | EAX | 9 hr |
| Jan 4, 3:00 AM CST | Winter Weather Advisory | EAX | 32 hr |
| Jan 10, 9:28 AM CST | Wind Advisory | EAX | 7 hr |
| Jan 12, 3:52 AM CST | Winter Storm Watch | EAX | 10 hr |
| Jan 12, 2:21 PM CST | Ice Storm Warning | EAX | 4 days |
| Jan 15, 9:02 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 16, 3:59 PM CST | Dense Fog Advisory | EAX | 7 hr |
| Jan 18, 4:28 AM CST | Dense Fog Advisory | EAX | 8 hr |
| Jan 19, 3:07 PM CST | Dense Fog Advisory | EAX | 20 hr |
| Jan 20, 10:04 PM CST | Dense Fog Advisory | EAX | 12 hr |
| Feb 23, 9:48 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 27, 12:34 AM CST | Dense Fog Advisory | EAX | 8 hr |
| Mar 3, 1:48 PM CST | Fire Weather Watch | EAX | 13 hr |
| Mar 4, 2:42 AM CST | Red Flag Warning | EAX | 16 hr |
| Mar 6, 3:18 AM CST | Fire Weather Watch | EAX | 11 hr |
| Mar 6, 3:23 AM CST | Wind Advisory | EAX | 18 hr |
| Mar 6, 1:48 PM CST | Mesoscale Discussion | SPC | 117 min |
| Mar 6, 2:21 PM CST | Red Flag Warning | EAX | 28 hr |
| Mar 6, 2:27 PM CST | Tornado Watch | SPC | 8 hr |
| Mar 6, 6:31 PM CST | Mesoscale Discussion | SPC | 119 min |
| Mar 6, 6:43 PM CST | Severe Thunderstorm Warning | EAX | 47 min |
| Mar 6, 7:03 PM CST | Tornado Warning | EAX | 27 min |
| Mar 6, 7:19 PM CST | Mesoscale Discussion | SPC | 116 min |
| Mar 6, 7:26 PM CST | Severe Thunderstorm Warning | EAX | 34 min |
| Mar 6, 7:33 PM CST | Tornado Warning | EAX | 27 min |
| Mar 7, 11:07 AM CST | Wind Advisory | EAX | 5 hr |
| Mar 10, 3:14 AM CST | Freeze Warning | EAX | 57 hr |
| Mar 13, 12:50 PM CDT | Freeze Warning | EAX | 47 hr |
| Mar 24, 11:20 AM CDT | Special Weather Statement | EAX | 25 min |
| Apr 4, 11:34 AM CDT | Flood Watch | EAX | 25 hr |
| Apr 5, 9:15 AM CDT | Areal Flood Warning | EAX | 9 hr |
| Apr 5, 6:19 PM CDT | Areal Flood Warning | EAX | 24 hr |
| Apr 6, 2:58 AM CDT | Frost Advisory | EAX | 30 hr |
| Apr 9, 10:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 9, 11:28 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 10, 1:53 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 10, 3:02 PM CDT | Frost Advisory | EAX | 17 hr |
| Apr 15, 5:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 15, 7:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Apr 15, 9:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 17, 3:33 AM CDT | Wind Advisory | EAX | 15 hr |
| May 17, 11:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| May 17, 12:08 PM CDT | Tornado Watch | SPC | 7 hr |
| May 17, 2:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| May 18, 12:51 PM CDT | Flash Flood Watch | EAX | 37 hr |
| May 18, 9:41 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 14, 9:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 15, 6:39 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 16, 6:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 16, 7:52 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 16, 9:27 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 10:07 PM CDT | Severe Thunderstorm Warning | EAX | 38 min |
| Jun 16, 10:14 PM CDT | Severe Thunderstorm Warning | EAX | 46 min |
| Jun 16, 10:44 PM CDT | Severe Thunderstorm Warning | EAX | 61 min |
| Jun 16, 10:56 PM CDT | Severe Thunderstorm Warning | EAX | 49 min |
| Jun 17, 3:45 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 17, 6:12 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 8:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 2:53 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 28, 11:38 PM CDT | Severe Thunderstorm Warning | EAX | 52 min |
| Jun 29, 12:14 AM CDT | Severe Thunderstorm Warning | EAX | 46 min |
| Jun 29, 2:05 AM CDT | Special Weather Statement | EAX | 40 min |
| Jun 29, 3:25 AM CDT | Flash Flood Watch | EAX | 28 hr |
| Jun 29, 3:37 AM CDT | Areal Flood Warning | EAX | 48 hr |
| Jun 30, 12:58 AM CDT | Flash Flood Warning | EAX | 3 hr |
| Jun 30, 1:35 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 1:50 AM CDT | Areal Flood Warning | EAX | 48 hr |
| Jul 9, 2:55 PM CDT | Heat Advisory | EAX | 3 days |
| Jul 12, 6:10 PM CDT | Special Weather Statement | EAX | 35 min |
| Jul 12, 6:13 PM CDT | Mesoscale Discussion | SPC | 77 min |
| Jul 12, 6:46 PM CDT | Special Weather Statement | EAX | 29 min |
| Jul 13, 1:05 AM CDT | Flash Flood Warning | EAX | 5 hr |
| Jul 13, 5:50 AM CDT | Areal Flood Warning | EAX | 12 hr |
| Jul 15, 2:42 PM CDT | Excessive Heat Watch | EAX | 72 hr |
| Jul 17, 2:51 PM CDT | Excessive Heat Warning | EAX | 5 days |
| Jul 22, 5:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 5:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 22, 9:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 26, 3:25 AM CDT | Flash Flood Watch | EAX | 28 hr |
| Aug 18, 5:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 20, 3:39 AM CDT | Special Weather Statement | EAX | 51 min |
| Aug 20, 2:36 PM CDT | Flash Flood Watch | EAX | 43 hr |
| Sep 18, 10:15 PM CDT | Dense Fog Advisory | EAX | 11 hr |
| Oct 4, 3:14 PM CDT | Flood Watch | EAX | 60 hr |
| Oct 14, 3:35 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 21, 1:23 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 21, 2:23 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Oct 21, 5:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Oct 21, 6:45 PM CDT | Special Weather Statement | EAX | 45 min |
| Oct 26, 8:31 AM CDT | Freeze Watch | EAX | 18 hr |
| Oct 27, 2:35 AM CDT | Freeze Warning | EAX | 31 hr |
| Nov 1, 10:15 PM CDT | Dense Fog Advisory | EAX | 11 hr |
| Nov 12, 9:40 PM CST | Dense Fog Advisory | EAX | 8 hr |
| Dec 4, 6:31 PM CST | Wind Advisory | EAX | 5 hr |
| Dec 11, 11:06 AM CST | Wind Advisory | EAX | 7 hr |
| Dec 13, 10:39 AM CST | Wind Advisory | EAX | 6 hr |
| Dec 23, 3:50 AM CST | Winter Weather Advisory | EAX | 31 hr |
| Dec 26, 3:02 AM CST | Wind Chill Advisory | EAX | 31 hr |
| Dec 29, 3:52 PM CST | Wind Chill Advisory | EAX | 56 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
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.