Alert archive / Michigan / Kalamazoo County

Weather alerts in Kalamazoo County, Michigan, 2011

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

Kalamazoo County and its neighbors

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

Alerts: 197
Warnings: 25
Watches: 30
Advisories: 53
Busiest month: May36 alerts
Busiest day: May 29, 20118 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 3 tornado warnings covering Kalamazoo County in 2011 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 8 minutes after it went out.

Kalamazoo County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	1	67%	1	100%	8 min
Severe thunderstorm warnings	12	7	42%	21	43%	18 min
Flash flood warnings	0			1	0%

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Grand Rapids, MI: tornado warnings	13	1	92%	3	33%	8 min
NWS Grand Rapids, MI: severe thunderstorm warnings	124	64	48%	242	62%	30 min
NWS Grand Rapids, MI: flash flood warnings	21	8	62%	27	56%	113 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, 4:17 PM EST	Winter Weather Advisory	GRR	24 hr
Jan 5, 4:16 PM EST	Lake Effect Snow Watch	GRR	19 hr
Jan 6, 11:00 AM EST	Lake Effect Snow Warning	GRR	70 hr
Jan 17, 10:28 AM EST	Winter Weather Advisory	GRR	24 hr
Jan 24, 11:17 AM EST	Winter Weather Advisory	GRR	12 hr
Jan 30, 5:38 AM EST	Winter Storm Watch	GRR	46 hr
Feb 1, 3:39 AM EST	Blizzard Warning	GRR	28 hr
Feb 1, 7:28 PM EST	Mesoscale Discussion	SPC	5 hr
Feb 2, 7:19 AM EST	Winter Weather Advisory	GRR	12 hr
Feb 6, 10:55 AM EST	Winter Weather Advisory	GRR	14 hr
Feb 18, 3:44 AM EST	Wind Advisory	GRR	20 hr
Feb 18, 1:35 PM EST	River Flood Advisory	GRR	44 hr
Feb 18, 3:54 PM EST	Winter Storm Watch	GRR	24 hr
Feb 19, 4:09 PM EST	Winter Storm Warning	GRR	48 hr
Feb 20, 11:49 AM EST	Mesoscale Discussion	SPC	4 hr
Feb 21, 4:09 PM EST	Winter Weather Advisory	GRR	12 hr
Feb 23, 10:50 PM EST	Special Weather Statement	GRR	115 min
Feb 24, 4:14 AM EST	Winter Storm Watch	GRR	12 hr
Feb 24, 7:45 AM EST	Special Weather Statement	GRR	2 hr
Feb 24, 4:14 PM EST	Winter Weather Advisory	GRR	18 hr
Feb 26, 2:04 AM EST	Special Weather Statement	GRR	116 min
Feb 26, 5:51 PM EST	Special Weather Statement	GRR	2 hr
Feb 26, 8:04 PM EST	Special Weather Statement	GRR	4 hr
Feb 27, 2:07 AM EST	Special Weather Statement	GRR	113 min
Feb 27, 4:06 AM EST	Special Weather Statement	GRR	114 min
Feb 27, 12:05 PM EST	River Flood Advisory	GRR	32 days
Feb 28, 12:04 AM EST	Mesoscale Discussion	SPC	6 hr
Mar 4, 2:06 PM EST	Flood Watch	GRR	13 hr
Mar 9, 9:45 PM EST	Dense Fog Advisory	GRR	6 hr
Mar 17, 7:49 PM EDT	Special Weather Statement	GRR	116 min
Mar 20, 8:39 PM EDT	Areal Flood Advisory	GRR	14 hr
Mar 20, 9:51 PM EDT	Special Weather Statement	GRR	39 min
Mar 23, 4:10 AM EDT	Special Weather Statement	GRR	2 hr
Mar 24, 6:58 AM EDT	Special Weather Statement	GRR	2 hr
Apr 3, 9:07 AM EDT	River Flood Advisory	GRR	26 hr
Apr 3, 10:31 PM EDT	Mesoscale Discussion	SPC	89 min
Apr 4, 2:53 AM EDT	Mesoscale Discussion	SPC	97 min
Apr 8, 12:02 PM EDT	River Flood Advisory	GRR	19 days
Apr 11, 12:03 AM EDT	Mesoscale Discussion	SPC	87 min
Apr 11, 2:35 AM EDT	Special Weather Statement	GRR	115 min
Apr 16, 4:34 PM EDT	Wind Advisory	GRR	25 hr
Apr 17, 3:59 PM EDT	Winter Weather Advisory	GRR	20 hr
Apr 19, 8:09 PM EDT	Special Weather Statement	GRR	51 min
Apr 19, 9:08 PM EDT	Special Weather Statement	GRR	52 min
Apr 19, 10:11 PM EDT	Special Weather Statement	GRR	49 min
Apr 19, 10:24 PM EDT	Severe Thunderstorm Warning	GRR	66 min
Apr 22, 11:14 PM EDT	Special Weather Statement	GRR	61 min
Apr 26, 1:26 PM EDT	Mesoscale Discussion	SPC	94 min
Apr 26, 3:02 PM EDT	Tornado Watch	SPC	7 hr
Apr 26, 3:21 PM EDT	Flood Watch	GRR	44 hr
Apr 26, 4:53 PM EDT	Mesoscale Discussion	SPC	67 min
Apr 26, 6:04 PM EDT	Severe Thunderstorm Warning	GRR	56 min
Apr 26, 6:59 PM EDT	Severe Thunderstorm Warning	GRR	46 min
Apr 26, 7:20 PM EDT	Tornado Warning	GRR	25 min
Apr 26, 8:33 PM EDT	Mesoscale Discussion	SPC	57 min
Apr 27, 5:17 AM EDT	Special Weather Statement	GRR	43 min
Apr 27, 10:00 AM EDT	River Flood Warning	GRR	12 hr
Apr 27, 2:39 PM EDT	Areal Flood Advisory	GRR	4 days
Apr 27, 9:41 PM EDT	River Flood Advisory	GRR	13 hr
Apr 28, 10:28 AM EDT	River Flood Warning	GRR	4 days
May 2, 11:20 AM EDT	River Flood Advisory	GRR	23 days
May 4, 2:25 PM EDT	Frost Advisory	GRR	18 hr
May 9, 6:33 PM EDT	Special Weather Statement	GRR	57 min
May 11, 6:56 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
May 11, 9:30 PM EDT	Special Weather Statement	GRR	90 min
May 11, 10:48 PM EDT	Severe Thunderstorm Warning	GRR	71 min
May 11, 11:00 PM EDT	Mesoscale Discussion	SPC	60 min
May 13, 5:49 PM EDT	Special Weather Statement	GRR	56 min
May 13, 6:46 PM EDT	Areal Flood Advisory	GRR	5 hr
May 13, 6:59 PM EDT	Special Weather Statement	GRR	61 min
May 19, 9:58 PM EDT	Dense Fog Advisory	GRR	14 hr
May 22, 5:16 PM EDT	Mesoscale Discussion	SPC	119 min
May 22, 5:32 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 22, 7:16 PM EDT	Severe Thunderstorm Warning	GRR	59 min
May 22, 8:20 PM EDT	Mesoscale Discussion	SPC	115 min
May 22, 10:59 PM EDT	Mesoscale Discussion	SPC	61 min
May 23, 12:35 PM EDT	Mesoscale Discussion	SPC	85 min
May 25, 6:35 AM EDT	Special Weather Statement	GRR	55 min
May 25, 6:46 AM EDT	Areal Flood Advisory	GRR	6 hr
May 25, 9:06 AM EDT	Flood Watch	GRR	33 hr
May 25, 10:26 AM EDT	River Flood Warning	GRR	71 hr
May 25, 11:39 AM EDT	Areal Flood Advisory	GRR	72 hr
May 26, 11:05 AM EDT	River Flood Advisory	GRR	8 days
May 28, 9:20 AM EDT	River Flood Advisory	GRR	49 hr
May 29, 11:12 AM EDT	Flood Watch	GRR	11 hr
May 29, 12:59 PM EDT	Mesoscale Discussion	SPC	61 min
May 29, 1:29 PM EDT	Tornado Watch	SPC	7 hr
May 29, 3:14 PM EDT	Special Weather Statement	GRR	61 min
May 29, 3:27 PM EDT	Areal Flood Advisory	GRR	12 hr
May 29, 3:58 PM EDT	Tornado Warning	GRR	47 min
May 29, 4:16 PM EDT	Tornado Warning	GRR	31 min
May 29, 4:17 PM EDT	Mesoscale Discussion	SPC	88 min
May 29, 10:28 PM EDT	River Flood Warning	GRR	4 days
May 31, 1:59 PM EDT	Mesoscale Discussion	SPC	3 hr
May 31, 3:33 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 31, 7:26 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 3, 11:12 AM EDT	River Flood Advisory	GRR	10 days
Jun 8, 12:08 PM EDT	Mesoscale Discussion	SPC	97 min
Jun 8, 10:39 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 9, 12:13 AM EDT	Special Weather Statement	GRR	62 min
Jun 9, 12:45 AM EDT	Mesoscale Discussion	SPC	90 min
Jun 10, 7:48 AM EDT	Special Weather Statement	GRR	87 min
Jun 21, 4:47 PM EDT	Mesoscale Discussion	SPC	88 min
Jun 21, 4:57 PM EDT	Tornado Watch	SPC	7 hr
Jun 21, 6:37 PM EDT	Severe Thunderstorm Warning	GRR	83 min
Jun 22, 11:46 AM EDT	Mesoscale Discussion	SPC	119 min
Jun 22, 1:14 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 30, 5:00 PM EDT	Flash Flood Watch	GRR	23 hr
Jul 1, 3:39 PM EDT	Special Weather Statement	GRR	51 min
Jul 2, 2:06 PM EDT	Mesoscale Discussion	SPC	54 min
Jul 2, 2:24 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 2, 7:17 PM EDT	Mesoscale Discussion	SPC	58 min
Jul 11, 6:37 AM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 11, 7:19 AM EDT	Special Weather Statement	GRR	56 min
Jul 11, 7:48 AM EDT	Special Weather Statement	GRR	57 min
Jul 11, 8:10 AM EDT	Mesoscale Discussion	SPC	95 min
Jul 11, 8:50 AM EDT	Mesoscale Discussion	SPC	55 min
Jul 11, 10:21 AM EDT	Severe Thunderstorm Warning	GRR	84 min
Jul 11, 10:55 AM EDT	Mesoscale Discussion	SPC	65 min
Jul 11, 11:01 AM EDT	Areal Flood Advisory	GRR	3 hr
Jul 18, 10:59 AM EDT	Heat Advisory	GRR	9 hr
Jul 18, 4:07 PM EDT	Excessive Heat Watch	GRR	12 hr
Jul 18, 11:32 PM EDT	Special Weather Statement	GRR	118 min
Jul 18, 11:59 PM EDT	Severe Thunderstorm Warning	GRR	69 min
Jul 19, 4:00 AM EDT	Excessive Heat Warning	GRR	65 hr
Jul 22, 10:41 AM EDT	Flash Flood Watch	GRR	5 hr
Jul 23, 4:26 PM EDT	Special Weather Statement	GRR	64 min
Jul 27, 8:46 PM EDT	Flash Flood Watch	GRR	32 hr
Jul 28, 8:58 PM EDT	River Flood Advisory	GRR	63 hr
Jul 28, 10:24 PM EDT	Special Weather Statement	GRR	66 min
Jul 29, 12:51 AM EDT	Mesoscale Discussion	SPC	84 min
Jul 29, 1:15 AM EDT	Special Weather Statement	GRR	90 min
Jul 29, 1:45 AM EDT	Severe Thunderstorm Warning	GRR	45 min
Jul 29, 3:31 AM EDT	Mesoscale Discussion	SPC	89 min
Jul 29, 3:51 AM EDT	Areal Flood Advisory	GRR	12 hr
Jul 29, 10:34 AM EDT	River Flood Advisory	GRR	12 hr
Aug 2, 11:26 AM EDT	Flash Flood Watch	GRR	15 hr
Aug 2, 2:25 PM EDT	Mesoscale Discussion	SPC	95 min
Aug 2, 6:22 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 2, 9:28 PM EDT	Special Weather Statement	GRR	62 min
Aug 2, 9:34 PM EDT	Mesoscale Discussion	SPC	86 min
Aug 2, 11:36 PM EDT	Special Weather Statement	GRR	54 min
Aug 3, 12:25 AM EDT	Mesoscale Discussion	SPC	95 min
Aug 3, 12:59 AM EDT	Special Weather Statement	GRR	61 min
Aug 7, 3:53 AM EDT	Dense Fog Advisory	GRR	5 hr
Aug 9, 5:10 AM EDT	Dense Fog Advisory	GRR	4 hr
Aug 9, 3:06 PM EDT	Special Weather Statement	GRR	54 min
Aug 13, 10:37 AM EDT	Special Weather Statement	GRR	53 min
Aug 13, 12:45 PM EDT	Mesoscale Discussion	SPC	60 min
Aug 13, 12:46 PM EDT	Special Weather Statement	GRR	59 min
Aug 13, 1:06 PM EDT	Severe Thunderstorm Warning	GRR	54 min
Aug 13, 1:12 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 13, 1:31 PM EDT	Areal Flood Advisory	GRR	5 hr
Aug 13, 4:29 PM EDT	Special Weather Statement	GRR	91 min
Aug 13, 5:04 PM EDT	Severe Thunderstorm Warning	GRR	64 min
Aug 20, 12:04 PM EDT	Mesoscale Discussion	SPC	116 min
Aug 20, 1:41 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 24, 12:11 AM EDT	Special Weather Statement	GRR	64 min
Aug 24, 4:46 PM EDT	Mesoscale Discussion	SPC	89 min
Aug 24, 5:21 PM EDT	Special Weather Statement	GRR	54 min
Aug 24, 6:00 PM EDT	Tornado Watch	SPC	5 hr
Aug 24, 7:53 PM EDT	Severe Thunderstorm Warning	GRR	49 min
Aug 24, 8:25 PM EDT	Mesoscale Discussion	SPC	95 min
Sep 2, 4:20 AM EDT	Heat Advisory	GRR	13 hr
Sep 3, 1:24 PM EDT	Mesoscale Discussion	SPC	66 min
Sep 3, 4:05 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 3, 6:02 PM EDT	Mesoscale Discussion	SPC	58 min
Sep 15, 4:15 AM EDT	Frost Advisory	GRR	29 hr
Sep 19, 10:39 PM EDT	Dense Fog Advisory	GRR	11 hr
Sep 29, 4:35 AM EDT	Dense Fog Advisory	GRR	4 hr
Sep 29, 7:21 PM EDT	Special Weather Statement	GRR	54 min
Sep 29, 8:14 PM EDT	Special Weather Statement	GRR	61 min
Oct 1, 4:15 AM EDT	Frost Advisory	GRR	29 hr
Oct 15, 3:44 AM EDT	Wind Advisory	GRR	14 hr
Oct 19, 4:20 AM EDT	Wind Advisory	GRR	33 hr
Oct 19, 9:58 AM EDT	River Flood Advisory	GRR	4 days
Oct 19, 2:23 PM EDT	Areal Flood Advisory	GRR	24 hr
Oct 21, 2:42 PM EDT	Freeze Warning	GRR	19 hr
Oct 23, 10:37 AM EDT	River Flood Advisory	GRR	4 days
Oct 25, 7:08 PM EDT	Special Weather Statement	GRR	67 min
Oct 28, 8:39 AM EDT	Special Weather Statement	GRR	81 min
Oct 29, 1:34 PM EDT	Special Weather Statement	GRR	116 min
Nov 9, 3:48 AM EST	Wind Advisory	GRR	16 hr
Nov 9, 11:26 AM EST	Special Weather Statement	GRR	109 min
Nov 13, 8:42 PM EST	Special Weather Statement	GRR	48 min
Nov 28, 3:59 PM EST	Flood Watch	GRR	24 hr
Nov 28, 9:11 PM EST	River Flood Advisory	GRR	17 days
Nov 29, 3:30 AM EST	Winter Storm Watch	GRR	8 hr
Nov 29, 11:48 AM EST	Winter Weather Advisory	GRR	21 hr
Nov 29, 3:12 PM EST	Mesoscale Discussion	SPC	4 hr
Dec 15, 10:52 AM EST	River Flood Warning	GRR	47 hr
Dec 17, 9:56 AM EST	River Flood Advisory	GRR	17 days
Dec 17, 10:20 PM EST	Winter Weather Advisory	GRR	6 hr
Dec 21, 4:42 AM EST	Dense Fog Advisory	GRR	6 hr
Dec 27, 10:11 AM EST	Special Weather Statement	GRR	49 min
Dec 27, 10:19 AM EST	Special Weather Statement	GRR	41 min
Dec 29, 7:57 AM EST	Winter Weather Advisory	GRR	5 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	12
Tornado Warning	3
Severe Thunderstorm Watch	11
Tornado Watch	4
Mesoscale Discussion	39
Special Weather Statement	50
Flooding
River Flood Warning	5
Flash Flood Watch	4
Flood Watch	5
Areal Flood Advisory	10
River Flood Advisory	15
Winter
Blizzard Warning	1
Lake Effect Snow Warning	1
Winter Storm Warning	1
Lake Effect Snow Watch	1
Winter Storm Watch	4
Winter Weather Advisory	11
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	2
Cold
Freeze Warning	1
Frost Advisory	3
Wind and dust
Wind Advisory	5
Fog and smoke
Dense Fog Advisory	7

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.