Alert archive / Kansas / Lyon County / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Lyon County, Kansas, 2017

24 severe thunderstorm warnings in 2017. An alert counts here when it covered this county. The archive of severe thunderstorm warnings reaches back to 1986.

Lyon County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Severe Thunderstorm Warnings
24
Busiest month
June10 severe thunderstorm warnings
Busiest day
June 18, 20174 severe thunderstorm warnings

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

13 of 24 severe thunderstorm warnings covering Lyon County in 2017 had a qualifying storm report inside them; 14 of 17 hail, wind and damage reports fell inside a warning, on average 23 minutes after it went out.

Lyon County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Severe thunderstorm warnings241346%1782%23 min

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Topeka, KS: severe thunderstorm warnings19111341%28587%19 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.

IssuedProductOfficeLasted
Mar 6, 6:35 PM CSTSevere Thunderstorm WarningTOP25 min
Mar 6, 6:49 PM CSTSevere Thunderstorm WarningTOP56 min
Mar 6, 6:56 PM CSTSevere Thunderstorm WarningTOP64 min
May 17, 2:58 AM CDTSevere Thunderstorm WarningTOP47 min
May 18, 8:18 PM CDTSevere Thunderstorm WarningTOP42 min
May 26, 1:30 AM CDTSevere Thunderstorm WarningTOP30 min
May 27, 10:48 AM CDTSevere Thunderstorm WarningTOP23 min
May 27, 3:18 PM CDTSevere Thunderstorm WarningTOP42 min
May 27, 3:58 PM CDTSevere Thunderstorm WarningTOP47 min
Jun 15, 6:25 PM CDTSevere Thunderstorm WarningTOP50 min
Jun 15, 7:13 PM CDTSevere Thunderstorm WarningTOP47 min
Jun 17, 2:07 AM CDTSevere Thunderstorm WarningTOP23 min
Jun 17, 7:34 PM CDTSevere Thunderstorm WarningTOP41 min
Jun 17, 7:55 PM CDTSevere Thunderstorm WarningTOP35 min
Jun 17, 8:21 PM CDTSevere Thunderstorm WarningTOP39 min
Jun 17, 8:44 PM CDTSevere Thunderstorm WarningTOP46 min
Jun 27, 1:54 PM CDTSevere Thunderstorm WarningTOP51 min
Jun 27, 2:45 PM CDTSevere Thunderstorm WarningTOP45 min
Jun 29, 5:41 AM CDTSevere Thunderstorm WarningTOP49 min
Aug 16, 4:32 PM CDTSevere Thunderstorm WarningTOP28 min
Oct 9, 4:08 PM CDTSevere Thunderstorm WarningTOP33 min
Oct 14, 4:16 PM CDTSevere Thunderstorm WarningTOP44 min
Oct 14, 5:42 PM CDTSevere Thunderstorm WarningTOP63 min
Oct 21, 4:07 PM CDTSevere Thunderstorm WarningTOP53 min

The busiest days

Days with the most alerts issued, by UTC date.

  1. June 18, 20174severe thunderstorm warnings
  2. March 7, 20173severe thunderstorm warnings
  3. May 27, 20173severe thunderstorm warnings
  4. June 27, 20172severe thunderstorm warnings
  5. October 14, 20172severe thunderstorm warnings
  6. May 17, 20171severe thunderstorm warnings
  7. May 19, 20171severe thunderstorm warnings
  8. May 26, 20171severe thunderstorm warnings
  9. June 15, 20171severe thunderstorm warnings
  10. June 16, 20171severe thunderstorm warnings

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.