Weather alerts in Lyon County, Kansas, 2015

162 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lyon County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts: 162
Warnings: 51
Watches: 27
Advisories: 36
Busiest month: May41 alerts
Busiest day: May 24, 201510 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 1 tornado warnings covering Lyon County in 2015 had a tornado report inside them; 1 of 3 tornado reports fell inside a warning, on average 2 minutes after it went out.

Lyon County, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	1	0%	3	33%	2 min
Severe thunderstorm warnings	19	11	42%	13	100%	20 min
Flash flood warnings	2	2	0%	4	100%	116 min

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Topeka, KS: tornado warnings	32	15	53%	23	74%	11 min
NWS Topeka, KS: severe thunderstorm warnings	231	136	41%	280	86%	19 min
NWS Topeka, KS: flash flood warnings	35	24	31%	57	88%	86 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, 3:35 PM CST	Winter Weather Advisory	TOP	35 hr
Jan 6, 3:03 PM CST	Wind Chill Advisory	TOP	21 hr
Jan 7, 3:29 PM CST	Wind Chill Advisory	TOP	18 hr
Jan 25, 3:03 AM CST	Wind Advisory	TOP	11 hr
Feb 3, 3:32 PM CST	Winter Weather Advisory	TOP	26 hr
Feb 15, 3:40 AM CST	Winter Weather Advisory	TOP	29 hr
Feb 17, 10:30 AM CST	Winter Weather Advisory	TOP	8 hr
Feb 20, 4:16 AM CST	Winter Weather Advisory	TOP	26 hr
Feb 27, 3:26 PM CST	Winter Weather Advisory	TOP	45 hr
Mar 15, 4:15 AM CDT	Fire Weather Watch	TOP	23 hr
Mar 16, 3:09 AM CDT	Red Flag Warning	TOP	17 hr
Apr 2, 9:14 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 3, 12:44 AM CDT	Special Weather Statement	TOP	31 min
Apr 8, 2:47 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 8, 11:25 PM CDT	Special Weather Statement	TOP	35 min
Apr 16, 7:39 AM CDT	Dense Fog Advisory	TOP	2 hr
Apr 16, 6:23 PM CDT	Mesoscale Discussion	SPC	97 min
May 4, 10:37 PM CDT	Areal Flood Advisory	TOP	4 hr
May 6, 7:40 PM CDT	Mesoscale Discussion	SPC	65 min
May 6, 8:31 PM CDT	Tornado Watch	SPC	5 hr
May 6, 9:40 PM CDT	Mesoscale Discussion	SPC	95 min
May 6, 11:17 PM CDT	Mesoscale Discussion	SPC	88 min
May 7, 9:14 AM CDT	Special Weather Statement	TOP	31 min
May 7, 9:18 AM CDT	Severe Thunderstorm Warning	TOP	42 min
May 10, 1:47 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
May 10, 3:13 PM CDT	Mesoscale Discussion	SPC	92 min
May 16, 3:34 PM CDT	Mesoscale Discussion	SPC	86 min
May 16, 5:09 PM CDT	Special Weather Statement	TOP	36 min
May 16, 5:13 PM CDT	Severe Thunderstorm Warning	TOP	47 min
May 16, 5:35 PM CDT	Tornado Warning	TOP	13 min
May 16, 5:46 PM CDT	Mesoscale Discussion	SPC	59 min
May 16, 5:55 PM CDT	Severe Thunderstorm Warning	TOP	50 min
May 16, 10:18 PM CDT	Areal Flood Advisory	TOP	117 min
May 16, 11:04 PM CDT	River Flood Warning	TOP	24 hr
May 17, 2:01 AM CDT	River Flood Warning	ICT	45 hr
May 17, 6:41 AM CDT	River Flood Warning	TOP	3 days
May 17, 7:13 AM CDT	River Flood Warning	TOP	50 hr
May 17, 8:19 AM CDT	River Flood Warning	TOP	3 days
May 22, 3:39 PM CDT	Flash Flood Watch	TOP	60 hr
May 23, 6:24 PM CDT	Areal Flood Advisory	TOP	111 min
May 23, 7:22 PM CDT	Areal Flood Advisory	TOP	83 min
May 23, 8:30 PM CDT	Flash Flood Warning	TOP	6 hr
May 23, 8:34 PM CDT	River Flood Warning	ICT	4 days
May 23, 8:56 PM CDT	River Flood Warning	TOP	10 days
May 23, 8:56 PM CDT	River Flood Warning	TOP	8 days
May 23, 8:56 PM CDT	River Flood Warning	TOP	41 hr
May 23, 11:25 PM CDT	River Flood Warning	TOP	45 hr
May 24, 2:06 AM CDT	Areal Flood Warning	TOP	6 hr
May 24, 10:44 AM CDT	Areal Flood Warning	TOP	6 hr
May 24, 4:45 PM CDT	Areal Flood Warning	TOP	6 hr
May 24, 8:15 PM CDT	River Flood Warning	TOP	17 hr
May 25, 2:33 PM CDT	Mesoscale Discussion	SPC	57 min
May 25, 3:43 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 25, 6:39 PM CDT	Mesoscale Discussion	SPC	96 min
May 26, 5:42 AM CDT	River Flood Warning	ICT	16 hr
May 28, 9:06 PM CDT	River Flood Warning	TOP	29 hr
May 29, 10:24 AM CDT	Flash Flood Watch	TOP	5 hr
May 29, 11:01 AM CDT	Areal Flood Advisory	TOP	119 min
Jun 3, 2:43 PM CDT	Flash Flood Watch	TOP	68 hr
Jun 3, 3:00 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 4, 8:10 PM CDT	Mesoscale Discussion	SPC	65 min
Jun 5, 1:09 AM CDT	Severe Thunderstorm Warning	TOP	36 min
Jun 5, 1:22 AM CDT	Mesoscale Discussion	SPC	113 min
Jun 5, 1:42 AM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 5, 1:44 AM CDT	Severe Thunderstorm Warning	TOP	46 min
Jun 5, 4:06 AM CDT	Special Weather Statement	TOP	24 min
Jun 7, 4:10 AM CDT	Flash Flood Watch	TOP	22 hr
Jun 7, 7:23 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 7, 9:10 PM CDT	Severe Thunderstorm Warning	TOP	36 min
Jun 7, 9:38 PM CDT	Mesoscale Discussion	SPC	97 min
Jun 7, 11:29 PM CDT	Mesoscale Discussion	SPC	91 min
Jun 11, 4:47 PM CDT	Mesoscale Discussion	SPC	58 min
Jun 11, 5:22 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 11, 7:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 19, 3:07 PM CDT	Heat Advisory	TOP	29 hr
Jun 21, 3:53 PM CDT	Heat Advisory	TOP	27 hr
Jun 25, 4:52 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 26, 12:56 AM CDT	Severe Thunderstorm Warning	TOP	34 min
Jul 1, 3:47 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 6:26 PM CDT	Special Weather Statement	TOP	34 min
Jul 3, 1:16 AM CDT	Special Weather Statement	TOP	44 min
Jul 5, 11:17 AM CDT	Special Weather Statement	TOP	28 min
Jul 5, 11:55 AM CDT	Special Weather Statement	TOP	35 min
Jul 6, 3:39 AM CDT	Flash Flood Watch	TOP	48 hr
Jul 6, 1:57 PM CDT	Mesoscale Discussion	SPC	93 min
Jul 6, 3:26 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 10, 2:16 PM CDT	Mesoscale Discussion	SPC	59 min
Jul 10, 2:48 PM CDT	Severe Thunderstorm Warning	TOP	32 min
Jul 10, 3:34 PM CDT	Special Weather Statement	TOP	41 min
Jul 10, 4:01 PM CDT	Severe Thunderstorm Warning	TOP	44 min
Jul 10, 4:05 PM CDT	Areal Flood Advisory	TOP	3 hr
Jul 10, 4:22 PM CDT	Severe Thunderstorm Warning	TOP	38 min
Jul 10, 4:33 PM CDT	Flash Flood Warning	TOP	5 hr
Jul 10, 4:42 PM CDT	Severe Thunderstorm Warning	TOP	48 min
Jul 10, 8:16 PM CDT	River Flood Warning	TOP	39 hr
Jul 10, 9:45 PM CDT	Areal Flood Warning	TOP	4 hr
Jul 11, 3:58 AM CDT	Heat Advisory	TOP	65 hr
Jul 11, 4:43 AM CDT	River Flood Warning	TOP	26 hr
Jul 12, 3:37 AM CDT	Excessive Heat Warning	TOP	41 hr
Jul 13, 3:39 PM CDT	Heat Advisory	TOP	29 hr
Jul 15, 3:37 AM CDT	Mesoscale Discussion	SPC	83 min
Jul 15, 6:09 PM CDT	Tornado Watch	SPC	4 hr
Jul 16, 3:35 PM CDT	Heat Advisory	TOP	53 hr
Jul 19, 11:16 PM CDT	Special Weather Statement	TOP	44 min
Jul 23, 2:23 PM CDT	Heat Advisory	TOP	23 hr
Jul 24, 4:02 AM CDT	Excessive Heat Warning	TOP	17 hr
Jul 25, 3:34 AM CDT	Heat Advisory	TOP	15 hr
Jul 25, 2:55 PM CDT	Mesoscale Discussion	SPC	95 min
Jul 25, 3:20 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 25, 3:28 PM CDT	Heat Advisory	TOP	28 hr
Jul 25, 6:46 PM CDT	Mesoscale Discussion	SPC	89 min
Jul 25, 9:32 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 27, 3:36 AM CDT	Heat Advisory	TOP	16 hr
Jul 27, 3:16 PM CDT	Heat Advisory	TOP	29 hr
Aug 5, 4:21 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 5, 6:40 AM CDT	Mesoscale Discussion	SPC	95 min
Aug 7, 3:51 PM CDT	Heat Advisory	TOP	28 hr
Aug 8, 4:14 AM CDT	Severe Thunderstorm Warning	TOP	46 min
Aug 18, 2:11 PM CDT	Mesoscale Discussion	SPC	3 hr
Aug 18, 3:06 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 18, 5:15 PM CDT	Mesoscale Discussion	SPC	90 min
Aug 22, 3:48 PM CDT	Tornado Watch	SPC	8 hr
Aug 22, 8:49 PM CDT	Mesoscale Discussion	SPC	116 min
Aug 22, 11:53 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 23, 1:21 AM CDT	Special Weather Statement	TOP	24 min
Aug 27, 5:36 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 30, 4:34 AM CDT	Dense Fog Advisory	TOP	5 hr
Sep 7, 3:37 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 7, 6:23 PM CDT	Mesoscale Discussion	SPC	97 min
Sep 7, 8:38 PM CDT	Mesoscale Discussion	SPC	67 min
Sep 10, 2:59 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Sep 10, 5:27 PM CDT	Mesoscale Discussion	SPC	93 min
Sep 10, 7:42 PM CDT	Mesoscale Discussion	SPC	93 min
Sep 10, 8:03 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Sep 10, 8:12 PM CDT	Severe Thunderstorm Warning	TOP	48 min
Sep 10, 8:24 PM CDT	Severe Thunderstorm Warning	TOP	51 min
Sep 10, 8:35 PM CDT	Severe Thunderstorm Warning	TOP	25 min
Sep 10, 8:43 PM CDT	Severe Thunderstorm Warning	TOP	32 min
Sep 10, 9:08 PM CDT	Severe Thunderstorm Warning	TOP	52 min
Sep 10, 9:21 PM CDT	Severe Thunderstorm Warning	TOP	39 min
Sep 10, 9:37 PM CDT	Severe Thunderstorm Warning	TOP	23 min
Sep 15, 3:30 AM CDT	Wind Advisory	TOP	16 hr
Sep 18, 9:52 AM CDT	Flash Flood Watch	TOP	9 hr
Oct 18, 4:52 PM CDT	Fire Weather Watch	TOP	11 hr
Oct 19, 3:45 AM CDT	Red Flag Warning	TOP	15 hr
Oct 19, 9:03 AM CDT	Wind Advisory	TOP	7 hr
Oct 25, 2:40 PM CDT	Frost Advisory	TOP	17 hr
Oct 28, 3:58 AM CDT	Dense Fog Advisory	TOP	3 hr
Nov 5, 12:55 PM CST	Mesoscale Discussion	SPC	95 min
Nov 5, 3:17 PM CST	Mesoscale Discussion	SPC	118 min
Nov 9, 3:04 PM CST	Fire Weather Watch	TOP	21 hr
Nov 10, 11:43 AM CST	Red Flag Warning	TOP	32 hr
Nov 10, 3:18 PM CST	Wind Advisory	TOP	32 hr
Nov 10, 10:25 PM CST	High Wind Warning	TOP	20 hr
Nov 12, 3:51 AM CST	Red Flag Warning	TOP	13 hr
Nov 25, 3:51 PM CST	Winter Storm Warning	TOP	42 hr
Nov 26, 3:26 PM CST	Winter Weather Advisory	TOP	72 hr
Nov 29, 2:49 AM CST	Ice Storm Warning	TOP	9 hr
Dec 20, 3:03 AM CST	Wind Advisory	TOP	15 hr
Dec 26, 3:41 AM CST	Winter Storm Watch	TOP	24 hr
Dec 27, 4:06 AM CST	Winter Storm Warning	TOP	34 hr
Dec 28, 3:46 AM CST	Winter Weather Advisory	TOP	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	19
Tornado Warning	1
Severe Thunderstorm Watch	14
Tornado Watch	3
Mesoscale Discussion	36
Special Weather Statement	12
Flooding
Areal Flood Warning	4
Flash Flood Warning	2
River Flood Warning	15
Flash Flood Watch	6
Areal Flood Advisory	6
Winter
Ice Storm Warning	1
Winter Storm Warning	2
Winter Storm Watch	1
Winter Weather Advisory	8
Heat
Excessive Heat Warning	2
Heat Advisory	11
Cold
Frost Advisory	1
Wind Chill Advisory	2
Wind and dust
High Wind Warning	1
Wind Advisory	5
Fire
Red Flag Warning	4
Fire Weather Watch	3
Fog and smoke
Dense Fog Advisory	3

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2014 2016

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.