Weather alerts in Butler County, Ohio, 2010

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

Butler County and its neighbors

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

Alerts: 171
Warnings: 46
Watches: 28
Advisories: 46
Busiest month: June50 alerts
Busiest day: August 4, 20109 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 Butler County in 2010 had a tornado report inside them.

Butler 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	26	22	15%	23	87%	24 min
Flash flood warnings	3	2	33%	1	100%	8 min

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Wilmington, OH: tornado warnings	42	13	69%	21	86%	16 min
NWS Wilmington, OH: severe thunderstorm warnings	268	199	26%	460	85%	23 min
NWS Wilmington, OH: flash flood warnings	45	29	36%	66	86%	120 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 3, 4:00 AM EST	Wind Chill Advisory	ILN	8 hr
Jan 5, 3:38 PM EST	Winter Storm Watch	ILN	24 hr
Jan 6, 4:00 PM EST	Winter Weather Advisory	ILN	48 hr
Jan 16, 6:39 AM EST	Dense Fog Advisory	ILN	7 hr
Jan 16, 7:09 PM EST	Dense Fog Advisory	ILN	11 hr
Jan 17, 5:55 PM EST	Dense Fog Advisory	ILN	9 hr
Jan 26, 5:16 AM EST	Winter Weather Advisory	ILN	5 hr
Feb 3, 3:52 PM EST	Winter Storm Watch	ILN	23 hr
Feb 4, 3:11 PM EST	Winter Storm Warning	ILN	49 hr
Feb 7, 4:39 PM EST	Winter Storm Watch	ILN	24 hr
Feb 8, 4:05 PM EST	Winter Storm Warning	ILN	48 hr
Feb 13, 2:22 PM EST	Winter Storm Watch	ILN	21 hr
Feb 14, 11:42 AM EST	Winter Storm Warning	ILN	39 hr
Feb 14, 2:47 PM EST	Winter Weather Advisory	ILN	49 hr
Feb 22, 10:23 AM EST	Dense Fog Advisory	ILN	6 hr
Feb 26, 3:50 AM EST	Winter Weather Advisory	ILN	26 hr
Mar 12, 9:24 PM EST	Areal Flood Advisory	ILN	111 min
Apr 2, 5:08 AM EDT	Fire Weather Watch	ILN	6 hr
Apr 2, 11:31 AM EDT	Red Flag Warning	ILN	8 hr
Apr 5, 6:47 PM EDT	Mesoscale Discussion	SPC	58 min
Apr 5, 9:04 PM EDT	Mesoscale Discussion	SPC	56 min
Apr 5, 9:22 PM EDT	Severe Thunderstorm Warning	ILN	38 min
Apr 5, 9:53 PM EDT	Severe Thunderstorm Warning	ILN	37 min
Apr 7, 10:19 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 16, 12:44 PM EDT	Mesoscale Discussion	SPC	2 hr
Apr 16, 1:28 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 16, 4:34 PM EDT	Mesoscale Discussion	SPC	86 min
Apr 16, 6:14 PM EDT	Mesoscale Discussion	SPC	61 min
Apr 24, 6:45 PM EDT	Mesoscale Discussion	SPC	60 min
Apr 24, 7:15 PM EDT	Tornado Watch	SPC	8 hr
Apr 27, 3:46 AM EDT	Frost Advisory	ILN	29 hr
Apr 30, 4:18 PM EDT	Flash Flood Watch	ILN	59 hr
May 1, 3:54 AM EDT	Mesoscale Discussion	SPC	2 hr
May 1, 5:26 AM EDT	Severe Thunderstorm Warning	ILN	49 min
May 5, 7:09 PM EDT	Mesoscale Discussion	SPC	96 min
May 7, 3:30 PM EDT	Tornado Watch	SPC	9 hr
May 9, 3:51 AM EDT	Frost Advisory	ILN	29 hr
May 11, 7:17 PM EDT	Mesoscale Discussion	SPC	88 min
May 12, 7:57 AM EDT	Flash Flood Watch	ILN	6 hr
May 13, 12:02 PM EDT	Mesoscale Discussion	SPC	118 min
May 13, 1:46 PM EDT	Tornado Watch	SPC	6 hr
May 13, 4:02 PM EDT	Mesoscale Discussion	SPC	88 min
May 20, 3:58 AM EDT	Dense Fog Advisory	ILN	5 hr
May 21, 11:26 AM EDT	Mesoscale Discussion	SPC	64 min
May 21, 4:27 PM EDT	Areal Flood Advisory	ILN	2 hr
May 21, 5:36 PM EDT	Severe Thunderstorm Warning	ILN	39 min
May 21, 6:01 PM EDT	Areal Flood Advisory	ILN	119 min
May 27, 1:10 PM EDT	Severe Thunderstorm Warning	ILN	50 min
May 27, 1:17 PM EDT	Areal Flood Advisory	ILN	118 min
May 27, 2:15 PM EDT	Special Weather Statement	ILN	60 min
Jun 2, 6:21 PM EDT	Severe Thunderstorm Warning	ILN	39 min
Jun 2, 6:42 PM EDT	Mesoscale Discussion	SPC	63 min
Jun 2, 7:09 PM EDT	Severe Thunderstorm Warning	ILN	51 min
Jun 4, 12:15 PM EDT	Mesoscale Discussion	SPC	60 min
Jun 4, 1:14 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 4, 3:45 PM EDT	Mesoscale Discussion	SPC	60 min
Jun 5, 8:51 AM EDT	Mesoscale Discussion	SPC	114 min
Jun 5, 1:35 PM EDT	Mesoscale Discussion	SPC	85 min
Jun 5, 2:08 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 5, 7:14 PM EDT	Mesoscale Discussion	SPC	61 min
Jun 6, 3:38 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 11, 1:38 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 11, 3:51 PM EDT	Flash Flood Watch	ILN	24 hr
Jun 11, 4:21 PM EDT	Special Weather Statement	ILN	54 min
Jun 12, 11:12 AM EDT	Flash Flood Warning	ILN	4 hr
Jun 12, 2:51 PM EDT	Areal Flood Advisory	ILN	84 min
Jun 12, 5:47 PM EDT	Mesoscale Discussion	SPC	88 min
Jun 12, 8:34 PM EDT	Mesoscale Discussion	SPC	26 min
Jun 12, 8:38 PM EDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 12, 9:03 PM EDT	Flash Flood Watch	ILN	6 hr
Jun 12, 10:53 PM EDT	Areal Flood Advisory	ILN	112 min
Jun 13, 4:09 AM EDT	Areal Flood Advisory	ILN	77 min
Jun 13, 9:02 PM EDT	Mesoscale Discussion	SPC	58 min
Jun 13, 9:40 PM EDT	Special Weather Statement	ILN	65 min
Jun 14, 12:20 PM EDT	Flash Flood Watch	ILN	40 hr
Jun 14, 2:45 PM EDT	Mesoscale Discussion	SPC	60 min
Jun 14, 3:17 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 14, 5:25 PM EDT	Severe Thunderstorm Warning	ILN	50 min
Jun 14, 6:58 PM EDT	Areal Flood Advisory	ILN	3 hr
Jun 14, 10:15 PM EDT	Severe Thunderstorm Warning	ILN	45 min
Jun 14, 10:27 PM EDT	Areal Flood Advisory	ILN	2 hr
Jun 14, 10:37 PM EDT	Severe Thunderstorm Warning	ILN	38 min
Jun 14, 10:59 PM EDT	Mesoscale Discussion	SPC	61 min
Jun 15, 5:47 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 15, 6:58 PM EDT	Mesoscale Discussion	SPC	62 min
Jun 15, 8:41 PM EDT	Mesoscale Discussion	SPC	64 min
Jun 15, 8:47 PM EDT	Severe Thunderstorm Warning	ILN	43 min
Jun 15, 9:20 PM EDT	Flash Flood Warning	ILN	3 hr
Jun 15, 9:24 PM EDT	Severe Thunderstorm Warning	ILN	46 min
Jun 18, 10:14 PM EDT	Special Weather Statement	ILN	61 min
Jun 21, 11:32 AM EDT	Special Weather Statement	ILN	43 min
Jun 21, 11:49 AM EDT	Severe Thunderstorm Warning	ILN	41 min
Jun 21, 12:04 PM EDT	Areal Flood Advisory	ILN	3 hr
Jun 21, 12:04 PM EDT	Mesoscale Discussion	SPC	86 min
Jun 22, 3:27 AM EDT	Mesoscale Discussion	SPC	93 min
Jun 23, 1:01 PM EDT	Heat Advisory	ILN	5 hr
Jun 27, 12:52 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 27, 9:54 PM EDT	Severe Thunderstorm Warning	ILN	51 min
Jun 27, 10:55 PM EDT	Areal Flood Advisory	ILN	6 hr
Jun 28, 2:40 AM EDT	Flash Flood Watch	ILN	13 hr
Jul 12, 5:07 AM EDT	Flash Flood Warning	ILN	3 hr
Jul 13, 2:54 PM EDT	Areal Flood Advisory	ILN	3 hr
Jul 14, 3:51 AM EDT	Dense Fog Advisory	ILN	6 hr
Jul 15, 11:08 AM EDT	Heat Advisory	ILN	7 hr
Jul 20, 6:13 PM EDT	Mesoscale Discussion	SPC	92 min
Jul 22, 3:53 PM EDT	Heat Advisory	ILN	28 hr
Jul 22, 5:16 PM EDT	Severe Thunderstorm Warning	ILN	12 min
Jul 24, 4:05 AM EDT	Heat Advisory	ILN	16 hr
Aug 3, 3:56 PM EDT	Heat Advisory	ILN	24 hr
Aug 4, 10:37 AM EDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 4, 12:31 PM EDT	Excessive Heat Warning	ILN	7 hr
Aug 4, 12:51 PM EDT	Mesoscale Discussion	SPC	54 min
Aug 4, 2:28 PM EDT	Special Weather Statement	ILN	47 min
Aug 4, 2:31 PM EDT	Severe Thunderstorm Warning	ILN	44 min
Aug 4, 3:09 PM EDT	Mesoscale Discussion	SPC	66 min
Aug 4, 3:10 PM EDT	Severe Thunderstorm Warning	ILN	39 min
Aug 4, 6:25 PM EDT	Mesoscale Discussion	SPC	65 min
Aug 4, 7:02 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 4, 8:55 PM EDT	Mesoscale Discussion	SPC	65 min
Aug 4, 9:54 PM EDT	Severe Thunderstorm Warning	ILN	66 min
Aug 4, 10:14 PM EDT	Areal Flood Advisory	ILN	3 hr
Aug 4, 10:53 PM EDT	Severe Thunderstorm Warning	ILN	36 min
Aug 10, 3:04 AM EDT	Heat Advisory	ILN	17 hr
Aug 10, 3:56 PM EDT	Excessive Heat Warning	ILN	27 hr
Aug 10, 3:56 PM EDT	Heat Advisory	ILN	25 hr
Aug 11, 12:39 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 11, 1:34 PM EDT	Severe Thunderstorm Warning	ILN	56 min
Aug 11, 2:16 PM EDT	Severe Thunderstorm Warning	ILN	44 min
Aug 11, 4:28 PM EDT	Heat Advisory	ILN	27 hr
Aug 12, 4:28 PM EDT	Excessive Heat Warning	ILN	24 hr
Aug 14, 3:20 AM EDT	Heat Advisory	ILN	15 hr
Aug 14, 3:52 PM EDT	Severe Thunderstorm Warning	ILN	53 min
Aug 14, 4:20 PM EDT	Severe Thunderstorm Warning	ILN	55 min
Aug 15, 1:51 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 15, 3:21 PM EDT	Special Weather Statement	ILN	54 min
Aug 15, 4:06 PM EDT	Special Weather Statement	ILN	54 min
Aug 15, 4:11 PM EDT	Severe Thunderstorm Warning	ILN	36 min
Aug 15, 4:19 PM EDT	Mesoscale Discussion	SPC	86 min
Aug 15, 4:34 PM EDT	Areal Flood Advisory	ILN	116 min
Sep 7, 3:58 PM EDT	Mesoscale Discussion	SPC	62 min
Sep 16, 1:35 PM EDT	Mesoscale Discussion	SPC	85 min
Sep 22, 3:37 PM EDT	Special Weather Statement	ILN	53 min
Oct 5, 4:11 PM EDT	Frost Advisory	ILN	12 hr
Oct 13, 5:13 PM EDT	Special Weather Statement	ILN	62 min
Oct 21, 3:01 AM EDT	Frost Advisory	ILN	31 hr
Oct 21, 3:12 AM EDT	Red Flag Warning	ILN	17 hr
Oct 21, 3:31 PM EDT	Freeze Warning	ILN	18 hr
Oct 23, 4:44 AM EDT	Red Flag Warning	ILN	14 hr
Oct 25, 4:09 AM EDT	High Wind Watch	ILN	12 hr
Oct 25, 3:45 PM EDT	Wind Advisory	ILN	12 hr
Oct 26, 3:56 AM EDT	High Wind Warning	ILN	9 hr
Oct 26, 7:00 AM EDT	Mesoscale Discussion	SPC	2 hr
Oct 26, 8:55 AM EDT	Tornado Watch	SPC	7 hr
Oct 26, 11:19 AM EDT	Tornado Warning	ILN	41 min
Oct 26, 11:26 AM EDT	Severe Thunderstorm Warning	ILN	64 min
Oct 26, 12:02 PM EDT	Tornado Warning	ILN	25 min
Oct 26, 12:15 PM EDT	Severe Thunderstorm Warning	ILN	45 min
Oct 26, 12:32 PM EDT	Wind Advisory	ILN	3 hr
Oct 28, 3:37 AM EDT	Freeze Warning	ILN	25 hr
Oct 29, 3:31 PM EDT	Freeze Warning	ILN	17 hr
Oct 29, 3:48 PM EDT	Fire Weather Watch	ILN	12 hr
Oct 30, 4:04 AM EDT	Red Flag Warning	ILN	15 hr
Nov 20, 6:13 AM EST	Dense Fog Advisory	ILN	4 hr
Nov 21, 12:27 AM EST	Dense Fog Advisory	ILN	8 hr
Nov 23, 1:36 AM EST	Special Weather Statement	ILN	54 min
Nov 24, 3:23 AM EST	Flood Watch	ILN	46 hr
Dec 3, 2:47 PM EST	Winter Weather Advisory	ILN	27 hr
Dec 11, 3:03 PM EST	Winter Weather Advisory	ILN	44 hr
Dec 15, 4:00 AM EST	Winter Weather Advisory	ILN	35 hr
Dec 15, 10:33 AM EST	Winter Storm Warning	ILN	28 hr
Dec 20, 9:03 PM EST	Winter Weather Advisory	ILN	6 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	26
Tornado Warning	2
Severe Thunderstorm Watch	10
Tornado Watch	4
Mesoscale Discussion	40
Special Weather Statement	11
Flooding
Flash Flood Warning	3
Flash Flood Watch	6
Flood Watch	1
Areal Flood Advisory	14
Winter
Winter Storm Warning	4
Winter Storm Watch	4
Winter Weather Advisory	8
Heat
Excessive Heat Warning	3
Heat Advisory	9
Cold
Freeze Warning	3
Frost Advisory	4
Wind Chill Advisory	1
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	2
Fire
Red Flag Warning	4
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	8

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.