Weather alerts in Lyon County, Kansas, 2010

210 weather alerts in 2010, 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 2010. Tap one for its archive.

Alerts: 210
Warnings: 78
Watches: 40
Advisories: 42
Busiest month: June41 alerts
Busiest day: June 14, 201012 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 2 tornado warnings covering Lyon County in 2010 had a tornado report inside them.

Lyon County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	0
Severe thunderstorm warnings	35	26	26%	22	82%	17 min
Flash flood warnings	8	8	0%	7	71%	115 min

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Topeka, KS: tornado warnings	32	3	91%	7	43%	4 min
NWS Topeka, KS: severe thunderstorm warnings	245	165	33%	513	86%	21 min
NWS Topeka, KS: flash flood warnings	50	34	32%	82	85%	84 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, 2:26 PM CST	Winter Weather Advisory	TOP	16 hr
Jan 5, 2:20 PM CST	Winter Weather Advisory	TOP	52 hr
Jan 6, 3:40 PM CST	Wind Chill Watch	TOP	12 hr
Jan 7, 3:27 AM CST	Wind Chill Warning	TOP	45 hr
Jan 9, 12:34 AM CST	Wind Chill Advisory	TOP	3 hr
Jan 14, 8:22 PM CST	Dense Fog Advisory	TOP	10 hr
Jan 15, 3:07 PM CST	Dense Fog Advisory	TOP	69 hr
Jan 18, 11:54 AM CST	Dense Fog Advisory	TOP	24 hr
Jan 19, 5:29 PM CST	Dense Fog Advisory	TOP	14 hr
Jan 28, 11:47 AM CST	Winter Weather Advisory	TOP	34 hr
Feb 3, 3:30 AM CST	Freezing Fog Advisory	TOP	6 hr
Feb 3, 3:14 PM CST	Winter Weather Advisory	TOP	51 hr
Feb 6, 3:27 AM CST	Winter Storm Watch	TOP	24 hr
Feb 7, 3:28 AM CST	Winter Storm Warning	TOP	24 hr
Feb 7, 3:28 AM CST	Winter Weather Advisory	TOP	36 hr
Feb 19, 3:25 PM CST	Winter Storm Watch	TOP	20 hr
Feb 20, 4:07 AM CST	Winter Storm Warning	TOP	36 hr
Feb 20, 11:13 PM CST	Mesoscale Discussion	SPC	6 hr
Feb 21, 6:32 AM CST	Mesoscale Discussion	SPC	5 hr
Feb 21, 11:44 AM CST	Winter Weather Advisory	TOP	10 hr
Mar 18, 10:16 PM CDT	Winter Storm Watch	TOP	16 hr
Mar 19, 1:57 PM CDT	Winter Storm Warning	TOP	45 hr
Mar 20, 3:53 AM CDT	Winter Weather Advisory	TOP	24 hr
Mar 30, 5:30 AM CDT	Fire Weather Watch	TOP	21 hr
Apr 1, 3:42 AM CDT	Wind Advisory	TOP	12 hr
Apr 5, 6:58 AM CDT	Severe Thunderstorm Warning	TOP	32 min
Apr 5, 7:14 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 5, 7:27 AM CDT	Severe Thunderstorm Warning	TOP	48 min
Apr 6, 1:32 PM CDT	Mesoscale Discussion	SPC	58 min
Apr 6, 2:08 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 6, 2:38 PM CDT	Severe Thunderstorm Warning	TOP	37 min
Apr 6, 3:14 PM CDT	Severe Thunderstorm Warning	TOP	46 min
Apr 6, 3:47 PM CDT	Severe Thunderstorm Warning	TOP	43 min
Apr 6, 4:09 PM CDT	Areal Flood Advisory	TOP	111 min
Apr 6, 4:52 PM CDT	Severe Thunderstorm Warning	TOP	38 min
Apr 6, 5:29 PM CDT	Areal Flood Advisory	TOP	2 hr
Apr 6, 6:08 PM CDT	Mesoscale Discussion	SPC	97 min
Apr 6, 6:41 PM CDT	Severe Thunderstorm Warning	TOP	49 min
Apr 6, 7:41 PM CDT	Severe Thunderstorm Warning	TOP	49 min
Apr 9, 11:23 AM CDT	Red Flag Warning	TOP	8 hr
Apr 22, 2:02 PM CDT	Areal Flood Advisory	TOP	118 min
Apr 22, 3:45 PM CDT	Flash Flood Warning	TOP	4 hr
Apr 22, 10:02 PM CDT	Flood Watch	TOP	15 hr
Apr 23, 4:34 AM CDT	River Flood Warning	TOP	10 hr
Apr 23, 10:00 PM CDT	Severe Thunderstorm Warning	TOP	45 min
Apr 28, 4:08 AM CDT	Wind Advisory	TOP	15 hr
Apr 28, 3:52 PM CDT	Wind Advisory	TOP	26 hr
Apr 29, 11:27 PM CDT	Wind Advisory	TOP	7 hr
Apr 29, 11:46 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 30, 2:12 AM CDT	Mesoscale Discussion	SPC	93 min
May 6, 3:45 PM CDT	Mesoscale Discussion	SPC	2 hr
May 6, 6:16 PM CDT	Mesoscale Discussion	SPC	59 min
May 6, 9:16 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
May 6, 10:34 PM CDT	Severe Thunderstorm Warning	TOP	41 min
May 6, 11:13 PM CDT	Severe Thunderstorm Warning	TOP	30 min
May 6, 11:49 PM CDT	Mesoscale Discussion	SPC	86 min
May 7, 2:31 AM CDT	Mesoscale Discussion	SPC	59 min
May 10, 3:14 PM CDT	Mesoscale Discussion	SPC	2 hr
May 10, 3:26 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 10, 4:42 PM CDT	Mesoscale Discussion	SPC	63 min
May 10, 6:40 PM CDT	Severe Thunderstorm Warning	TOP	50 min
May 10, 8:09 PM CDT	Severe Thunderstorm Warning	TOP	41 min
May 11, 11:05 PM CDT	Mesoscale Discussion	SPC	25 min
May 11, 11:16 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 12, 2:34 AM CDT	Mesoscale Discussion	SPC	56 min
May 12, 2:21 PM CDT	Mesoscale Discussion	SPC	54 min
May 12, 2:41 PM CDT	Tornado Watch	SPC	7 hr
May 12, 6:59 PM CDT	Mesoscale Discussion	SPC	61 min
May 12, 6:59 PM CDT	Severe Thunderstorm Warning	TOP	29 min
May 12, 8:30 PM CDT	Severe Thunderstorm Warning	TOP	23 min
May 12, 9:22 PM CDT	Mesoscale Discussion	SPC	53 min
May 12, 9:27 PM CDT	Severe Thunderstorm Warning	TOP	33 min
May 12, 10:21 PM CDT	Areal Flood Advisory	TOP	114 min
May 13, 12:20 AM CDT	Areal Flood Advisory	TOP	85 min
May 13, 12:24 AM CDT	Flash Flood Watch	TOP	3 hr
May 13, 1:40 AM CDT	Mesoscale Discussion	SPC	65 min
May 13, 6:09 AM CDT	River Flood Warning	TOP	14 hr
May 18, 3:48 AM CDT	Dense Fog Advisory	TOP	5 hr
May 19, 3:55 AM CDT	Flood Watch	TOP	36 hr
May 22, 3:40 AM CDT	Wind Advisory	TOP	16 hr
May 24, 10:26 PM CDT	Mesoscale Discussion	SPC	64 min
May 26, 1:17 AM CDT	Mesoscale Discussion	SPC	58 min
May 30, 3:23 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 30, 5:40 PM CDT	Severe Thunderstorm Warning	TOP	50 min
May 30, 6:07 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 8, 1:59 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 8, 7:07 AM CDT	Mesoscale Discussion	SPC	83 min
Jun 8, 1:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 8, 2:39 PM CDT	Tornado Watch	SPC	8 hr
Jun 8, 4:34 PM CDT	Areal Flood Advisory	TOP	116 min
Jun 8, 5:35 PM CDT	Flash Flood Warning	TOP	4 hr
Jun 8, 9:31 PM CDT	Flash Flood Warning	TOP	4 hr
Jun 9, 1:24 AM CDT	Flash Flood Warning	TOP	4 hr
Jun 9, 2:17 AM CDT	River Flood Warning	ICT	30 hr
Jun 9, 5:02 AM CDT	Areal Flood Warning	TOP	7 hr
Jun 9, 7:53 AM CDT	River Flood Warning	TOP	3 days
Jun 12, 3:14 PM CDT	Flash Flood Watch	TOP	43 hr
Jun 13, 3:06 AM CDT	Flash Flood Warning	TOP	4 hr
Jun 13, 7:00 AM CDT	Areal Flood Warning	TOP	4 hr
Jun 13, 8:12 AM CDT	River Flood Warning	ICT	4 days
Jun 13, 2:21 PM CDT	River Flood Warning	TOP	51 hr
Jun 13, 8:40 PM CDT	Mesoscale Discussion	SPC	65 min
Jun 13, 9:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 13, 9:53 PM CDT	Severe Thunderstorm Warning	TOP	37 min
Jun 13, 10:28 PM CDT	Severe Thunderstorm Warning	TOP	47 min
Jun 13, 10:53 PM CDT	Flash Flood Warning	TOP	4 hr
Jun 13, 11:02 PM CDT	Severe Thunderstorm Warning	TOP	43 min
Jun 13, 11:09 PM CDT	River Flood Warning	TOP	4 days
Jun 13, 11:09 PM CDT	River Flood Warning	TOP	34 hr
Jun 13, 11:43 PM CDT	Mesoscale Discussion	SPC	62 min
Jun 14, 2:34 AM CDT	Areal Flood Warning	TOP	9 hr
Jun 14, 3:41 AM CDT	River Flood Warning	TOP	5 days
Jun 14, 3:41 AM CDT	River Flood Warning	TOP	7 hr
Jun 16, 4:57 PM CDT	Tornado Warning	TOP	18 min
Jun 16, 5:09 PM CDT	Tornado Warning	TOP	21 min
Jun 16, 5:20 PM CDT	Mesoscale Discussion	SPC	55 min
Jun 16, 5:21 PM CDT	Severe Thunderstorm Warning	TOP	24 min
Jun 16, 5:45 PM CDT	Flash Flood Warning	TOP	3 hr
Jun 19, 8:02 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 19, 9:22 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 19, 10:14 PM CDT	Severe Thunderstorm Warning	TOP	31 min
Jun 19, 10:45 PM CDT	Severe Thunderstorm Warning	TOP	45 min
Jun 20, 8:07 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 20, 11:00 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 21, 1:48 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 22, 10:18 AM CDT	Heat Advisory	TOP	29 hr
Jul 4, 4:14 AM CDT	Flood Watch	TOP	48 hr
Jul 4, 4:40 PM CDT	Areal Flood Warning	TOP	3 hr
Jul 4, 7:22 PM CDT	Areal Flood Warning	TOP	6 hr
Jul 4, 7:53 PM CDT	Areal Flood Warning	TOP	112 min
Jul 4, 9:45 PM CDT	Areal Flood Warning	TOP	4 hr
Jul 5, 7:38 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 11, 5:55 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 11, 9:40 AM CDT	Mesoscale Discussion	SPC	95 min
Jul 11, 10:07 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 12, 2:16 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 12, 7:56 PM CDT	Mesoscale Discussion	SPC	64 min
Jul 13, 1:25 PM CDT	Heat Advisory	TOP	32 hr
Jul 15, 1:02 AM CDT	Flash Flood Warning	TOP	4 hr
Jul 15, 10:57 AM CDT	River Flood Warning	TOP	13 hr
Jul 16, 3:26 PM CDT	Heat Advisory	TOP	52 hr
Jul 16, 3:49 PM CDT	Mesoscale Discussion	SPC	86 min
Jul 18, 3:49 PM CDT	Excessive Heat Warning	TOP	52 hr
Jul 20, 3:32 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 20, 5:38 PM CDT	Mesoscale Discussion	SPC	97 min
Jul 20, 7:20 PM CDT	Severe Thunderstorm Warning	TOP	40 min
Jul 20, 8:01 PM CDT	Severe Thunderstorm Warning	TOP	44 min
Jul 20, 8:45 PM CDT	Severe Thunderstorm Warning	TOP	30 min
Jul 21, 3:53 AM CDT	Excessive Heat Warning	TOP	4 days
Jul 21, 8:45 AM CDT	Areal Flood Warning	TOP	4 hr
Jul 21, 9:26 AM CDT	River Flood Warning	TOP	28 hr
Jul 24, 2:22 PM CDT	Mesoscale Discussion	SPC	83 min
Jul 30, 1:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 1, 3:37 PM CDT	Heat Advisory	TOP	52 hr
Aug 2, 9:40 PM CDT	Excessive Heat Warning	TOP	43 hr
Aug 6, 3:31 PM CDT	Excessive Heat Watch	TOP	24 hr
Aug 7, 3:13 PM CDT	Excessive Heat Warning	TOP	7 days
Aug 11, 6:15 PM CDT	Severe Thunderstorm Warning	TOP	45 min
Aug 13, 3:11 PM CDT	Mesoscale Discussion	SPC	94 min
Aug 13, 3:28 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 13, 5:51 PM CDT	Mesoscale Discussion	SPC	54 min
Aug 13, 6:20 PM CDT	Severe Thunderstorm Warning	TOP	40 min
Aug 13, 7:11 PM CDT	Severe Thunderstorm Warning	TOP	34 min
Aug 13, 8:16 PM CDT	Severe Thunderstorm Warning	TOP	44 min
Aug 13, 9:40 PM CDT	Severe Thunderstorm Warning	TOP	35 min
Aug 14, 3:59 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 14, 7:42 PM CDT	Mesoscale Discussion	SPC	63 min
Aug 14, 10:28 PM CDT	Mesoscale Discussion	SPC	62 min
Aug 20, 4:26 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 20, 5:36 PM CDT	Severe Thunderstorm Warning	TOP	39 min
Aug 20, 6:13 PM CDT	Severe Thunderstorm Warning	TOP	32 min
Sep 2, 2:17 PM CDT	Mesoscale Discussion	SPC	118 min
Sep 2, 3:29 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 2, 3:46 PM CDT	Severe Thunderstorm Warning	TOP	29 min
Sep 6, 3:34 AM CDT	Wind Advisory	TOP	14 hr
Sep 8, 4:10 AM CDT	Flood Watch	TOP	23 hr
Sep 9, 11:15 PM CDT	Dense Fog Advisory	TOP	10 hr
Sep 10, 5:20 PM CDT	Mesoscale Discussion	SPC	85 min
Sep 10, 5:54 PM CDT	Tornado Watch	SPC	7 hr
Sep 10, 9:31 PM CDT	Severe Thunderstorm Warning	TOP	44 min
Sep 10, 9:40 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 13, 8:10 PM CDT	Severe Thunderstorm Watch	SPC	109 min
Sep 14, 2:10 AM CDT	Mesoscale Discussion	SPC	2 hr
Sep 14, 4:09 AM CDT	Areal Flood Advisory	TOP	111 min
Sep 15, 11:32 AM CDT	Special Weather Statement	TOP	28 min
Sep 15, 12:01 PM CDT	Flash Flood Watch	TOP	9 hr
Sep 15, 3:19 PM CDT	Tornado Watch	SPC	7 hr
Sep 15, 5:03 PM CDT	Mesoscale Discussion	SPC	117 min
Sep 15, 6:28 PM CDT	Special Weather Statement	TOP	32 min
Sep 18, 1:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 18, 2:21 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 18, 6:09 PM CDT	Mesoscale Discussion	SPC	96 min
Sep 23, 8:31 PM CDT	Special Weather Statement	TOP	59 min
Sep 25, 1:51 PM CDT	Special Weather Statement	TOP	39 min
Oct 2, 3:13 AM CDT	Frost Advisory	TOP	30 hr
Oct 3, 2:33 PM CDT	Frost Advisory	TOP	18 hr
Oct 25, 3:01 PM CDT	Wind Advisory	TOP	7 hr
Oct 27, 3:25 AM CDT	Red Flag Warning	TOP	16 hr
Oct 28, 3:43 AM CDT	Freeze Warning	TOP	29 hr
Oct 29, 3:54 AM CDT	Red Flag Warning	TOP	15 hr
Nov 5, 9:02 PM CDT	Fire Weather Watch	TOP	18 hr
Nov 6, 3:07 PM CDT	Red Flag Warning	TOP	28 hr
Nov 21, 4:07 AM CST	Dense Fog Advisory	TOP	5 hr
Nov 27, 3:22 PM CST	Wind Advisory	TOP	27 hr
Dec 10, 6:51 PM CST	Wind Advisory	TOP	33 hr
Dec 15, 5:56 PM CST	Winter Weather Advisory	TOP	4 hr
Dec 23, 11:04 AM CST	Winter Weather Advisory	TOP	25 hr
Dec 30, 11:08 AM CST	Winter Weather Advisory	TOP	25 hr
Dec 30, 1:04 PM CST	Wind Advisory	TOP	3 hr
Dec 31, 3:56 AM CST	Mesoscale Discussion	SPC	3 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	35
Tornado Warning	2
Severe Thunderstorm Watch	22
Tornado Watch	4
Mesoscale Discussion	46
Special Weather Statement	4
Flooding
Areal Flood Warning	8
Flash Flood Warning	8
River Flood Warning	12
Flash Flood Watch	3
Flood Watch	4
Areal Flood Advisory	7
Winter
Winter Storm Warning	3
Winter Storm Watch	3
Winter Weather Advisory	10
Heat
Excessive Heat Warning	4
Excessive Heat Watch	1
Heat Advisory	4
Cold
Freeze Warning	1
Wind Chill Warning	1
Wind Chill Watch	1
Frost Advisory	2
Wind Chill Advisory	1
Wind and dust
Wind Advisory	10
Fire
Red Flag Warning	4
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	7
Freezing Fog Advisory	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2009 2011

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.