Alert archive / Indiana / Decatur County

Weather alerts in Decatur County, Indiana, 2011

154 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Decatur County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts: 154
Warnings: 44
Watches: 30
Advisories: 24
Busiest month: April32 alerts
Busiest day: May 25, 20119 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 7 tornado warnings covering Decatur County in 2011 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 37 minutes after it went out.

Decatur County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	7	1	86%	2	100%	37 min
Severe thunderstorm warnings	20	8	60%	22	18%	17 min
Flash flood warnings	1	1	0%	0

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Indianapolis, IN: tornado warnings	88	7	92%	15	60%	25 min
NWS Indianapolis, IN: severe thunderstorm warnings	324	144	56%	510	60%	21 min
NWS Indianapolis, IN: flash flood warnings	37	11	70%	19	79%	65 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 10, 4:06 AM EST	Winter Weather Advisory	IND	63 hr
Jan 18, 3:50 PM EST	Winter Storm Watch	IND	22 hr
Jan 19, 4:01 AM EST	Winter Weather Advisory	IND	48 hr
Jan 30, 4:11 AM EST	Winter Storm Watch	IND	33 hr
Jan 31, 1:38 PM EST	Winter Storm Warning	IND	53 hr
Jan 31, 3:45 PM EST	Mesoscale Discussion	SPC	5 hr
Jan 31, 7:56 PM EST	Mesoscale Discussion	SPC	5 hr
Feb 1, 12:42 PM EST	Mesoscale Discussion	SPC	5 hr
Feb 1, 1:33 PM EST	Ice Storm Warning	IND	17 hr
Feb 1, 1:33 PM EST	Winter Storm Warning	IND	29 hr
Feb 1, 4:54 PM EST	Mesoscale Discussion	SPC	5 hr
Feb 5, 2:47 AM EST	Winter Weather Advisory	IND	15 hr
Feb 17, 1:22 PM EST	Wind Advisory	IND	6 hr
Feb 27, 4:17 AM EST	Flood Watch	IND	30 hr
Feb 28, 12:35 AM EST	Areal Flood Warning	IND	42 hr
Feb 28, 12:46 AM EST	Tornado Watch	SPC	5 hr
Feb 28, 3:32 AM EST	Mesoscale Discussion	SPC	58 min
Feb 28, 4:05 AM EST	Severe Thunderstorm Warning	IND	40 min
Mar 3, 3:35 AM EST	Flood Watch	IND	59 hr
Mar 5, 7:38 AM EST	Areal Flood Warning	IND	35 hr
Mar 6, 2:34 PM EST	Areal Flood Warning	IND	12 hr
Mar 23, 12:02 PM EDT	Mesoscale Discussion	SPC	88 min
Mar 23, 1:13 PM EDT	Tornado Watch	SPC	7 hr
Mar 23, 1:20 PM EDT	Severe Thunderstorm Warning	IND	40 min
Mar 23, 1:48 PM EDT	Tornado Warning	IND	42 min
Mar 23, 2:03 PM EDT	Severe Thunderstorm Warning	IND	42 min
Apr 2, 2:38 PM EDT	Wind Advisory	IND	32 hr
Apr 4, 5:20 AM EDT	Mesoscale Discussion	SPC	25 min
Apr 4, 5:30 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 4, 7:53 AM EDT	Mesoscale Discussion	SPC	2 hr
Apr 4, 12:08 PM EDT	Special Weather Statement	IND	37 min
Apr 4, 12:50 PM EDT	Mesoscale Discussion	SPC	25 min
Apr 11, 5:34 AM EDT	Special Weather Statement	IND	41 min
Apr 11, 1:11 PM EDT	Areal Flood Warning	IND	24 hr
Apr 19, 9:19 AM EDT	Flash Flood Watch	IND	18 hr
Apr 19, 9:29 AM EDT	Mesoscale Discussion	SPC	61 min
Apr 19, 7:46 PM EDT	Tornado Watch	SPC	9 hr
Apr 20, 12:16 AM EDT	Severe Thunderstorm Warning	IND	44 min
Apr 20, 12:25 AM EDT	Severe Thunderstorm Warning	IND	40 min
Apr 21, 3:52 AM EDT	Flood Watch	IND	58 hr
Apr 22, 2:31 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 22, 8:31 PM EDT	Mesoscale Discussion	SPC	59 min
Apr 23, 1:14 AM EDT	Severe Thunderstorm Warning	IND	31 min
Apr 23, 1:47 AM EDT	Severe Thunderstorm Warning	IND	28 min
Apr 23, 11:51 AM EDT	Mesoscale Discussion	SPC	84 min
Apr 23, 1:27 PM EDT	Flash Flood Watch	IND	5 days
Apr 25, 10:36 AM EDT	Areal Flood Warning	IND	9 hr
Apr 26, 1:26 PM EDT	Mesoscale Discussion	SPC	94 min
Apr 26, 5:38 PM EDT	Mesoscale Discussion	SPC	37 min
Apr 26, 5:50 PM EDT	Tornado Watch	SPC	5 hr
Apr 26, 9:35 PM EDT	Mesoscale Discussion	SPC	55 min
Apr 27, 12:48 AM EDT	Flash Flood Warning	IND	5 hr
Apr 27, 1:10 AM EDT	Severe Thunderstorm Warning	IND	50 min
Apr 27, 6:27 PM EDT	Mesoscale Discussion	SPC	63 min
Apr 27, 7:22 PM EDT	Tornado Watch	SPC	8 hr
Apr 27, 9:22 PM EDT	Mesoscale Discussion	SPC	53 min
Apr 28, 12:40 AM EDT	Wind Advisory	IND	4 hr
Apr 28, 1:38 PM EDT	Mesoscale Discussion	SPC	97 min
May 1, 3:35 AM EDT	Flood Watch	IND	62 hr
May 1, 10:51 PM EDT	Areal Flood Warning	IND	12 hr
May 2, 11:07 AM EDT	Areal Flood Warning	IND	24 hr
May 3, 10:57 AM EDT	Areal Flood Warning	IND	24 hr
May 4, 3:45 PM EDT	Frost Advisory	IND	17 hr
May 7, 8:15 PM EDT	Mesoscale Discussion	SPC	90 min
May 10, 11:21 AM EDT	Mesoscale Discussion	SPC	114 min
May 10, 1:10 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 22, 2:51 PM EDT	Mesoscale Discussion	SPC	54 min
May 22, 3:23 PM EDT	Severe Thunderstorm Warning	IND	67 min
May 23, 1:54 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
May 23, 3:52 PM EDT	Mesoscale Discussion	SPC	53 min
May 23, 5:56 PM EDT	Tornado Warning	IND	34 min
May 23, 6:01 PM EDT	Severe Thunderstorm Warning	IND	44 min
May 23, 6:20 PM EDT	Mesoscale Discussion	SPC	55 min
May 25, 9:33 AM EDT	Mesoscale Discussion	SPC	87 min
May 25, 9:50 AM EDT	Tornado Watch	SPC	9 hr
May 25, 4:33 PM EDT	Flash Flood Watch	IND	9 hr
May 25, 4:41 PM EDT	Tornado Warning	IND	49 min
May 25, 4:48 PM EDT	Severe Thunderstorm Warning	IND	42 min
May 25, 5:26 PM EDT	Tornado Warning	IND	19 min
May 25, 5:49 PM EDT	Severe Thunderstorm Warning	IND	41 min
May 25, 6:19 PM EDT	Mesoscale Discussion	SPC	86 min
May 25, 6:44 PM EDT	Tornado Watch PDS	SPC	6 hr
May 25, 8:30 PM EDT	Tornado Warning	IND	45 min
May 25, 8:40 PM EDT	Mesoscale Discussion	SPC	2 hr
May 25, 9:11 PM EDT	Tornado Warning	IND	49 min
May 25, 10:55 PM EDT	Severe Thunderstorm Warning	IND	50 min
May 25, 10:58 PM EDT	Tornado Warning	IND	47 min
Jun 4, 6:13 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 4, 8:55 PM EDT	Mesoscale Discussion	SPC	65 min
Jun 9, 6:31 PM EDT	Mesoscale Discussion	SPC	89 min
Jun 10, 1:10 PM EDT	Mesoscale Discussion	SPC	95 min
Jun 10, 2:02 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 10, 4:48 PM EDT	Mesoscale Discussion	SPC	87 min
Jun 10, 8:34 PM EDT	Mesoscale Discussion	SPC	56 min
Jun 11, 1:40 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 11, 2:15 AM EDT	Areal Flood Warning	IND	5 hr
Jun 15, 9:14 AM EDT	Special Weather Statement	IND	61 min
Jun 20, 7:54 AM EDT	Severe Thunderstorm Warning	IND	51 min
Jun 20, 8:14 AM EDT	Areal Flood Advisory	IND	3 hr
Jun 20, 8:36 AM EDT	Severe Thunderstorm Warning	IND	39 min
Jun 20, 9:53 AM EDT	Mesoscale Discussion	SPC	97 min
Jun 20, 11:05 AM EDT	Areal Flood Advisory	IND	4 hr
Jun 20, 2:04 PM EDT	Mesoscale Discussion	SPC	56 min
Jun 20, 3:01 PM EDT	Areal Flood Warning	IND	24 hr
Jun 21, 3:19 PM EDT	Areal Flood Warning	IND	24 hr
Jun 22, 4:43 PM EDT	Mesoscale Discussion	SPC	92 min
Jun 27, 4:14 AM EDT	Mesoscale Discussion	SPC	91 min
Jul 10, 3:34 PM EDT	Heat Advisory	IND	28 hr
Jul 11, 8:50 AM EDT	Mesoscale Discussion	SPC	55 min
Jul 11, 7:18 PM EDT	Severe Thunderstorm Watch	SPC	3 hr
Jul 12, 3:30 AM EDT	Heat Advisory	IND	17 hr
Jul 16, 3:18 PM EDT	Excessive Heat Watch	IND	66 hr
Jul 18, 3:11 PM EDT	Heat Advisory	IND	18 hr
Jul 19, 9:11 AM EDT	Excessive Heat Warning	IND	5 days
Jul 20, 6:26 PM EDT	Mesoscale Discussion	SPC	94 min
Jul 24, 1:42 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 24, 1:42 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 27, 3:21 PM EDT	Heat Advisory	IND	29 hr
Jul 29, 3:25 AM EDT	Heat Advisory	IND	16 hr
Jul 29, 4:51 PM EDT	Mesoscale Discussion	SPC	84 min
Aug 2, 3:28 AM EDT	Heat Advisory	IND	17 hr
Aug 3, 7:44 AM EDT	Special Weather Statement	IND	46 min
Aug 7, 12:14 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 8, 6:00 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 9, 3:28 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 9, 8:31 PM EDT	Mesoscale Discussion	SPC	89 min
Aug 9, 8:37 PM EDT	Severe Thunderstorm Warning	IND	38 min
Aug 9, 9:03 PM EDT	Severe Thunderstorm Warning	IND	42 min
Aug 13, 5:53 PM EDT	Mesoscale Discussion	SPC	37 min
Aug 13, 5:57 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 21, 4:14 PM EDT	Severe Thunderstorm Warning	IND	25 min
Aug 24, 9:18 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 24, 9:56 PM EDT	Mesoscale Discussion	SPC	94 min
Aug 25, 1:12 AM EDT	Severe Thunderstorm Warning	IND	18 min
Sep 1, 2:47 PM EDT	Heat Advisory	IND	29 hr
Sep 25, 8:49 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 26, 12:33 AM EDT	Severe Thunderstorm Warning	IND	42 min
Sep 26, 1:45 AM EDT	Mesoscale Discussion	SPC	3 hr
Sep 29, 4:28 PM EDT	Mesoscale Discussion	SPC	92 min
Sep 29, 5:56 PM EDT	Special Weather Statement	IND	49 min
Oct 1, 3:32 AM EDT	Frost Advisory	IND	29 hr
Oct 19, 7:25 PM EDT	Wind Advisory	IND	20 hr
Oct 21, 3:47 AM EDT	Frost Advisory	IND	29 hr
Oct 27, 2:51 PM EDT	Frost Advisory	IND	18 hr
Oct 28, 2:43 PM EDT	Frost Advisory	IND	18 hr
Oct 29, 3:05 PM EDT	Frost Advisory	IND	18 hr
Nov 12, 2:52 PM EST	Wind Advisory	IND	28 hr
Nov 14, 12:24 PM EST	Mesoscale Discussion	SPC	96 min
Nov 14, 12:41 PM EST	Tornado Watch	SPC	7 hr
Nov 14, 6:32 PM EST	Mesoscale Discussion	SPC	88 min
Nov 27, 11:46 PM EST	Areal Flood Advisory	IND	9 hr
Nov 28, 2:47 PM EST	Flood Watch	IND	25 hr
Dec 4, 4:36 AM EST	Flood Watch	IND	37 hr
Dec 5, 7:51 AM EST	Areal Flood Warning	IND	36 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	20
Tornado Warning	7
Severe Thunderstorm Watch	10
Tornado Watch	8
Mesoscale Discussion	51
Special Weather Statement	5
Flooding
Areal Flood Warning	12
Flash Flood Warning	1
Flash Flood Watch	3
Flood Watch	6
Areal Flood Advisory	3
Winter
Ice Storm Warning	1
Winter Storm Warning	2
Winter Storm Watch	2
Winter Weather Advisory	3
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	7
Cold
Frost Advisory	6
Wind and dust
Wind Advisory	5

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2010 2012

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.