Weather alerts in Henry County, Missouri, 2010

214 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Henry County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts: 214
Warnings: 59
Watches: 46
Advisories: 38
Busiest month: July38 alerts
Busiest day: July 11, 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.

Henry County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	10	4	60%	5	100%	15 min
Flash flood warnings	2	2	0%	1	0%

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Kansas City, MO: tornado warnings	28	9	68%	22	59%	14 min
NWS Kansas City, MO: severe thunderstorm warnings	346	186	46%	467	79%	17 min
NWS Kansas City, MO: flash flood warnings	71	39	45%	105	83%	116 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 4, 3:34 PM CST	Wind Chill Advisory	EAX	19 hr
Jan 5, 2:36 PM CST	Winter Storm Warning	EAX	38 hr
Jan 7, 4:31 AM CST	Wind Chill Warning	EAX	43 hr
Jan 7, 4:31 AM CST	Winter Weather Advisory	EAX	16 hr
Jan 8, 9:24 PM CST	Wind Chill Advisory	EAX	13 hr
Jan 12, 8:44 AM CST	Freezing Fog Advisory	EAX	3 hr
Jan 15, 6:26 AM CST	Dense Fog Advisory	EAX	6 hr
Jan 15, 3:06 PM CST	Freezing Fog Advisory	EAX	21 hr
Jan 16, 12:16 PM CST	Dense Fog Advisory	EAX	26 hr
Jan 17, 3:44 PM CST	Dense Fog Advisory	EAX	41 hr
Jan 19, 7:59 AM CST	River Flood Warning	EAX	49 hr
Jan 19, 10:12 AM CST	River Flood Warning	EAX	38 hr
Jan 23, 8:53 PM CST	Dense Fog Advisory	EAX	5 hr
Jan 28, 3:20 PM CST	Winter Weather Advisory	EAX	31 hr
Feb 4, 4:04 AM CST	Winter Weather Advisory	EAX	38 hr
Feb 6, 4:15 AM CST	Winter Storm Watch	EAX	34 hr
Feb 7, 2:21 PM CST	Winter Weather Advisory	EAX	35 hr
Feb 12, 3:05 PM CST	Winter Weather Advisory	EAX	66 hr
Feb 19, 9:47 PM CST	Dense Fog Advisory	EAX	5 hr
Feb 20, 8:27 PM CST	Flood Watch	EAX	15 hr
Feb 21, 7:40 AM CST	River Flood Warning	EAX	28 hr
Feb 21, 7:40 AM CST	River Flood Warning	EAX	48 hr
Mar 10, 6:26 PM CST	Special Weather Statement	EAX	49 min
Mar 10, 6:45 PM CST	Severe Thunderstorm Warning	EAX	30 min
Mar 11, 5:39 AM CST	River Flood Warning	EAX	10 hr
Mar 11, 5:39 AM CST	River Flood Warning	EAX	29 hr
Mar 18, 4:02 AM CDT	Dense Fog Advisory	EAX	6 hr
Mar 19, 3:57 AM CDT	Winter Storm Watch	EAX	12 hr
Mar 19, 3:57 PM CDT	Winter Storm Warning	EAX	41 hr
Mar 22, 6:56 PM CDT	River Flood Warning	EAX	25 hr
Mar 24, 4:06 AM CDT	Flood Watch	EAX	24 hr
Mar 25, 2:36 AM CDT	River Flood Warning	EAX	16 hr
Mar 25, 8:04 AM CDT	River Flood Warning	EAX	10 hr
Mar 26, 3:49 PM CDT	Flood Watch	EAX	30 hr
Mar 27, 9:04 PM CDT	River Flood Warning	EAX	24 hr
Mar 27, 9:04 PM CDT	River Flood Warning	EAX	34 hr
Mar 30, 3:20 PM CDT	Fire Weather Watch	EAX	19 hr
Apr 2, 8:28 AM CDT	Mesoscale Discussion	SPC	92 min
Apr 2, 9:46 AM CDT	Severe Thunderstorm Warning	EAX	29 min
Apr 4, 2:22 PM CDT	Mesoscale Discussion	SPC	113 min
Apr 4, 3:34 PM CDT	Tornado Watch	SPC	8 hr
Apr 4, 8:25 PM CDT	Mesoscale Discussion	SPC	65 min
Apr 6, 9:28 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 6, 11:07 PM CDT	Severe Thunderstorm Warning	EAX	23 min
Apr 6, 11:24 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 7, 1:10 AM CDT	Mesoscale Discussion	SPC	95 min
Apr 7, 3:28 AM CDT	River Flood Warning	EAX	25 hr
Apr 7, 4:21 AM CDT	River Flood Warning	EAX	35 hr
Apr 8, 3:56 AM CDT	Frost Advisory	EAX	29 hr
Apr 22, 8:34 PM CDT	River Flood Warning	EAX	3 days
Apr 22, 8:34 PM CDT	River Flood Warning	EAX	3 days
Apr 22, 10:01 PM CDT	Flood Watch	EAX	15 hr
Apr 23, 4:20 AM CDT	Areal Flood Advisory	EAX	3 hr
Apr 23, 6:28 AM CDT	Flash Flood Warning	EAX	6 hr
Apr 23, 10:03 PM CDT	Mesoscale Discussion	SPC	27 min
Apr 28, 4:06 PM CDT	Wind Advisory	EAX	24 hr
Apr 30, 9:18 AM CDT	Mesoscale Discussion	SPC	57 min
Apr 30, 10:20 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 30, 1:22 PM CDT	Mesoscale Discussion	SPC	53 min
May 2, 6:14 AM CDT	Dense Fog Advisory	EAX	104 min
May 10, 2:49 PM CDT	Flood Watch	EAX	13 hr
May 10, 9:34 PM CDT	Special Weather Statement	EAX	26 min
May 10, 10:03 PM CDT	Special Weather Statement	EAX	27 min
May 11, 4:38 AM CDT	River Flood Warning	EAX	13 hr
May 11, 8:46 AM CDT	River Flood Warning	EAX	13 hr
May 12, 2:34 AM CDT	Mesoscale Discussion	SPC	56 min
May 12, 4:00 AM CDT	Flash Flood Watch	EAX	25 hr
May 12, 4:45 AM CDT	Areal Flood Advisory	EAX	6 hr
May 12, 4:51 AM CDT	Mesoscale Discussion	SPC	54 min
May 12, 9:07 AM CDT	River Flood Warning	EAX	69 hr
May 12, 9:07 AM CDT	River Flood Warning	EAX	3 days
May 12, 5:14 PM CDT	Mesoscale Discussion	SPC	91 min
May 12, 11:58 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 13, 12:14 AM CDT	Special Weather Statement	EAX	46 min
May 13, 4:23 AM CDT	Mesoscale Discussion	SPC	67 min
May 19, 4:05 AM CDT	Flood Watch	EAX	45 hr
May 20, 3:27 AM CDT	River Flood Warning	EAX	51 hr
May 20, 3:27 AM CDT	River Flood Warning	EAX	54 hr
May 20, 3:08 PM CDT	Mesoscale Discussion	SPC	2 hr
May 25, 11:26 AM CDT	Mesoscale Discussion	SPC	64 min
May 25, 4:19 PM CDT	Areal Flood Advisory	EAX	54 min
May 26, 1:58 AM CDT	River Flood Warning	EAX	11 hr
Jun 2, 7:03 AM CDT	Special Weather Statement	EAX	42 min
Jun 2, 7:49 AM CDT	Special Weather Statement	EAX	41 min
Jun 2, 5:14 PM CDT	Mesoscale Discussion	SPC	61 min
Jun 8, 7:07 AM CDT	Mesoscale Discussion	SPC	83 min
Jun 8, 2:39 PM CDT	Tornado Watch	SPC	8 hr
Jun 8, 2:55 PM CDT	Flash Flood Watch	EAX	10 hr
Jun 8, 6:13 PM CDT	Flash Flood Warning	EAX	6 hr
Jun 8, 6:26 PM CDT	River Flood Warning	EAX	35 hr
Jun 8, 6:26 PM CDT	River Flood Warning	EAX	51 hr
Jun 8, 6:52 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 8, 8:25 PM CDT	Severe Thunderstorm Warning	EAX	35 min
Jun 8, 8:34 PM CDT	Mesoscale Discussion	SPC	56 min
Jun 8, 8:44 PM CDT	Special Weather Statement	EAX	16 min
Jun 8, 11:50 PM CDT	Areal Flood Warning	EAX	11 hr
Jun 12, 12:05 PM CDT	Special Weather Statement	EAX	40 min
Jun 12, 2:34 PM CDT	River Flood Warning	EAX	5 days
Jun 12, 2:34 PM CDT	River Flood Warning	EAX	4 days
Jun 12, 3:39 PM CDT	Flash Flood Watch	EAX	42 hr
Jun 13, 12:30 PM CDT	Mesoscale Discussion	SPC	30 min
Jun 13, 12:47 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 13, 2:14 PM CDT	Mesoscale Discussion	SPC	61 min
Jun 13, 3:41 PM CDT	Mesoscale Discussion	SPC	64 min
Jun 13, 9:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 14, 1:31 AM CDT	Mesoscale Discussion	SPC	119 min
Jun 14, 1:54 AM CDT	Special Weather Statement	EAX	36 min
Jun 14, 3:51 PM CDT	Areal Flood Warning	EAX	24 hr
Jun 16, 5:20 PM CDT	Mesoscale Discussion	SPC	55 min
Jun 16, 5:37 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 16, 8:30 PM CDT	River Flood Warning	EAX	46 hr
Jun 16, 8:51 PM CDT	Areal Flood Advisory	EAX	4 hr
Jun 19, 8:02 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 21, 12:58 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 22, 4:17 AM CDT	Heat Advisory	EAX	38 hr
Jun 23, 2:44 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 23, 6:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 26, 10:45 AM CDT	Heat Advisory	EAX	8 hr
Jun 27, 3:18 PM CDT	Mesoscale Discussion	SPC	57 min
Jul 5, 3:23 PM CDT	Special Weather Statement	EAX	22 min
Jul 6, 10:53 AM CDT	River Flood Warning	EAX	22 hr
Jul 8, 8:02 PM CDT	Areal Flood Advisory	EAX	6 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 11, 12:17 PM CDT	Tornado Watch	SPC	3 hr
Jul 11, 1:31 PM CDT	Severe Thunderstorm Warning	EAX	29 min
Jul 11, 1:57 PM CDT	Severe Thunderstorm Warning	EAX	33 min
Jul 11, 2:06 PM CDT	Mesoscale Discussion	SPC	54 min
Jul 11, 2:49 PM CDT	River Flood Warning	EAX	38 hr
Jul 11, 2:49 PM CDT	River Flood Warning	EAX	49 hr
Jul 11, 3:19 PM CDT	Mesoscale Discussion	SPC	56 min
Jul 11, 3:37 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 11, 4:34 PM CDT	Severe Thunderstorm Warning	EAX	26 min
Jul 11, 4:56 PM CDT	Special Weather Statement	EAX	34 min
Jul 12, 3:30 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 12, 3:32 PM CDT	Flash Flood Watch	EAX	4 hr
Jul 12, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 13, 1:33 PM CDT	Heat Advisory	EAX	46 hr
Jul 15, 7:30 AM CDT	River Flood Warning	EAX	4 hr
Jul 16, 3:27 PM CDT	Heat Advisory	EAX	48 hr
Jul 16, 3:49 PM CDT	Mesoscale Discussion	SPC	86 min
Jul 18, 3:48 PM CDT	Excessive Heat Warning	EAX	52 hr
Jul 20, 3:59 AM CDT	Flash Flood Watch	EAX	26 hr
Jul 20, 2:26 PM CDT	Mesoscale Discussion	SPC	94 min
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, 6:10 PM CDT	Special Weather Statement	EAX	50 min
Jul 20, 8:32 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 21, 4:19 AM CDT	Excessive Heat Warning	EAX	64 hr
Jul 21, 4:19 AM CDT	Heat Advisory	EAX	4 days
Jul 24, 2:22 PM CDT	Mesoscale Discussion	SPC	83 min
Jul 24, 3:32 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 24, 6:20 PM CDT	Special Weather Statement	EAX	40 min
Jul 24, 6:46 PM CDT	Areal Flood Advisory	EAX	6 hr
Jul 26, 2:01 PM CDT	Special Weather Statement	EAX	29 min
Jul 30, 12:45 PM CDT	Mesoscale Discussion	SPC	60 min
Jul 30, 1:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 1, 2:42 PM CDT	Heat Advisory	EAX	3 days
Aug 4, 3:12 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 4, 5:22 PM CDT	Mesoscale Discussion	SPC	83 min
Aug 5, 2:42 AM CDT	Areal Flood Advisory	EAX	3 hr
Aug 6, 3:47 AM CDT	Excessive Heat Watch	EAX	60 hr
Aug 6, 3:47 AM CDT	Excessive Heat Warning	EAX	9 days
Aug 13, 3:28 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 13, 9:34 PM CDT	Mesoscale Discussion	SPC	56 min
Aug 14, 1:10 AM CDT	Special Weather Statement	EAX	50 min
Aug 20, 1:58 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 20, 5:20 PM CDT	Mesoscale Discussion	SPC	85 min
Aug 20, 7:46 PM CDT	Mesoscale Discussion	SPC	59 min
Aug 20, 10:19 PM CDT	Mesoscale Discussion	SPC	86 min
Sep 1, 1:17 AM CDT	Areal Flood Advisory	EAX	7 hr
Sep 1, 1:46 PM CDT	River Flood Warning	EAX	19 hr
Sep 2, 2:17 PM CDT	Mesoscale Discussion	SPC	118 min
Sep 2, 4:25 PM CDT	Mesoscale Discussion	SPC	65 min
Sep 2, 4:43 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 2, 7:12 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 8, 3:20 AM CDT	Flood Watch	EAX	23 hr
Sep 10, 11:46 AM CDT	Flash Flood Watch	EAX	16 hr
Sep 10, 3:10 PM CDT	Mesoscale Discussion	SPC	95 min
Sep 10, 5:54 PM CDT	Tornado Watch	SPC	7 hr
Sep 10, 9:40 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 10, 11:36 PM CDT	Areal Flood Advisory	EAX	4 hr
Sep 15, 3:54 AM CDT	Flash Flood Watch	EAX	18 hr
Sep 15, 5:03 PM CDT	Mesoscale Discussion	SPC	117 min
Sep 15, 8:56 PM CDT	River Flood Warning	EAX	35 hr
Sep 16, 3:41 AM CDT	River Flood Warning	EAX	17 hr
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 18, 7:31 PM CDT	Severe Thunderstorm Warning	EAX	29 min
Sep 23, 4:16 AM CDT	Flash Flood Watch	EAX	19 hr
Oct 2, 3:33 AM CDT	Frost Advisory	EAX	29 hr
Oct 3, 2:35 PM CDT	Frost Advisory	EAX	18 hr
Oct 23, 2:12 PM CDT	Mesoscale Discussion	SPC	93 min
Oct 25, 9:36 PM CDT	Mesoscale Discussion	SPC	24 min
Oct 25, 10:03 PM CDT	Tornado Watch	SPC	9 hr
Oct 25, 10:31 PM CDT	Special Weather Statement	EAX	29 min
Oct 25, 10:53 PM CDT	Special Weather Statement	EAX	37 min
Oct 25, 11:28 PM CDT	Special Weather Statement	EAX	32 min
Oct 25, 11:56 PM CDT	Special Weather Statement	EAX	49 min
Oct 27, 3:21 AM CDT	Red Flag Warning	EAX	16 hr
Oct 28, 3:42 AM CDT	Freeze Warning	EAX	29 hr
Nov 5, 3:52 PM CDT	Fire Weather Watch	EAX	23 hr
Nov 6, 3:15 PM CDT	Red Flag Warning	EAX	28 hr
Nov 7, 3:54 PM CST	Red Flag Warning	EAX	26 hr
Nov 22, 10:50 AM CST	Mesoscale Discussion	SPC	85 min
Nov 24, 2:28 PM CST	Tornado Watch	SPC	6 hr
Nov 24, 3:06 PM CST	Severe Thunderstorm Warning	EAX	24 min
Nov 24, 3:29 PM CST	Severe Thunderstorm Warning	EAX	31 min
Nov 28, 3:27 AM CST	Red Flag Warning	EAX	15 hr
Dec 10, 8:58 PM CST	Wind Advisory	EAX	39 hr
Dec 15, 6:30 PM CST	Winter Weather Advisory	EAX	9 hr
Dec 23, 10:41 AM CST	Winter Weather Advisory	EAX	37 hr
Dec 31, 5:45 AM CST	Mesoscale Discussion	SPC	2 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	10
Severe Thunderstorm Watch	20
Tornado Watch	6
Mesoscale Discussion	52
Special Weather Statement	19
Flooding
Areal Flood Warning	2
Flash Flood Warning	2
River Flood Warning	34
Flash Flood Watch	8
Flood Watch	7
Areal Flood Advisory	9
Winter
Winter Storm Warning	2
Winter Storm Watch	2
Winter Weather Advisory	7
Heat
Excessive Heat Warning	3
Excessive Heat Watch	1
Heat Advisory	6
Cold
Freeze Warning	1
Wind Chill Warning	1
Frost Advisory	3
Wind Chill Advisory	2
Wind and dust
Wind Advisory	2
Fire
Red Flag Warning	4
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	7
Freezing Fog Advisory	2

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.