Alert archive / Michigan / Gratiot County

Weather alerts in Gratiot County, Michigan, 2008

178 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Gratiot County and its neighbors

Each county as a circle sized by its count in 2008. Tap one for its archive.

Alerts: 178
Warnings: 35
Watches: 31
Advisories: 43
Busiest month: June41 alerts
Busiest day: June 6, 20087 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 1 tornado warnings covering Gratiot County in 2008 had a tornado report inside them.

Gratiot County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	20	14	30%	6	83%	19 min
Flash flood warnings	0			0

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Grand Rapids, MI: tornado warnings	16	3	81%	36	19%	18 min
NWS Grand Rapids, MI: severe thunderstorm warnings	129	74	43%	265	75%	31 min
NWS Grand Rapids, MI: flash flood warnings	6	5	17%	20	90%	240 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 5, 6:32 PM EST	Dense Fog Advisory	GRR	17 hr
Jan 7, 4:04 AM EST	Flood Watch	GRR	41 hr
Jan 7, 6:09 PM EST	Mesoscale Discussion	SPC	96 min
Jan 7, 7:01 PM EST	Tornado Watch	SPC	5 hr
Jan 7, 8:29 PM EST	Severe Thunderstorm Warning	GRR	31 min
Jan 7, 8:38 PM EST	Tornado Warning	GRR	37 min
Jan 9, 4:47 PM EST	Winter Storm Watch	GRR	23 hr
Jan 17, 9:38 PM EST	Wind Advisory	GRR	7 hr
Jan 19, 4:07 AM EST	Wind Chill Advisory	GRR	30 hr
Jan 21, 3:46 AM EST	Snow Advisory	GRR	35 hr
Jan 21, 3:46 AM EST	Winter Storm Warning	GRR	35 hr
Jan 28, 11:42 PM EST	Winter Weather Advisory	GRR	36 hr
Jan 30, 4:19 AM EST	Winter Storm Watch	GRR	23 hr
Jan 31, 3:27 AM EST	Heavy Snow Warning	GRR	37 hr
Feb 3, 8:12 PM EST	Winter Weather Advisory	GRR	28 hr
Feb 3, 11:44 PM EST	Snow Advisory	GRR	4 hr
Feb 4, 4:02 PM EST	Winter Storm Watch	GRR	23 hr
Feb 4, 11:32 PM EST	Freezing Fog Advisory	GRR	8 hr
Feb 5, 3:29 PM EST	Winter Storm Warning	GRR	32 hr
Feb 6, 12:32 PM EST	Mesoscale Discussion	SPC	6 hr
Feb 8, 4:26 PM EST	Winter Weather Advisory	GRR	56 hr
Feb 10, 3:33 PM EST	Wind Chill Advisory	GRR	9 hr
Feb 12, 2:25 PM EST	Snow Advisory	GRR	8 hr
Feb 16, 3:41 PM EST	Freezing Rain Advisory	GRR	21 hr
Feb 17, 2:03 AM EST	Mesoscale Discussion	SPC	5 hr
Feb 25, 7:48 AM EST	Freezing Rain Advisory	GRR	6 hr
Feb 28, 3:18 PM EST	Snow Advisory	GRR	24 hr
Mar 3, 1:15 PM EST	Winter Storm Watch	GRR	22 hr
Mar 12, 2:03 PM EDT	Winter Weather Advisory	GRR	14 hr
Mar 17, 2:55 PM EDT	Winter Weather Advisory	GRR	20 hr
Mar 21, 4:07 AM EDT	Snow Advisory	GRR	23 hr
Mar 31, 3:20 PM EDT	Wind Advisory	GRR	24 hr
Apr 1, 5:28 AM EDT	Special Weather Statement	GRR	92 min
Apr 7, 3:20 PM EDT	Mesoscale Discussion	SPC	2 hr
Apr 11, 11:47 AM EDT	Mesoscale Discussion	SPC	88 min
Apr 11, 12:58 PM EDT	Tornado Watch	SPC	8 hr
Apr 11, 2:35 PM EDT	Severe Thunderstorm Warning	GRR	40 min
Apr 11, 2:41 PM EDT	Mesoscale Discussion	SPC	94 min
Apr 11, 4:01 PM EDT	Special Weather Statement	GRR	59 min
Apr 11, 4:40 PM EDT	Severe Thunderstorm Warning	GRR	50 min
Apr 23, 11:27 AM EDT	Fire Weather Watch	GRR	3 hr
Apr 23, 2:51 PM EDT	Red Flag Warning	GRR	29 hr
Apr 25, 2:58 PM EDT	Special Weather Statement	GRR	62 min
Apr 25, 3:21 PM EDT	Severe Thunderstorm Warning	GRR	24 min
Apr 29, 3:47 AM EDT	Freeze Warning	GRR	28 hr
May 2, 2:38 PM EDT	Special Weather Statement	GRR	97 min
May 2, 4:30 PM EDT	Special Weather Statement	GRR	90 min
May 2, 9:13 PM EDT	Tornado Watch	SPC	3 hr
May 2, 11:44 PM EDT	Special Weather Statement	GRR	61 min
May 13, 8:11 PM EDT	Mesoscale Discussion	SPC	2 hr
May 17, 4:54 PM EDT	Severe Thunderstorm Warning	GRR	51 min
May 17, 5:35 PM EDT	Severe Thunderstorm Warning	GRR	55 min
May 18, 3:32 PM EDT	Frost Advisory	GRR	16 hr
May 24, 11:06 AM EDT	Fire Weather Watch	GRR	17 hr
May 25, 4:02 AM EDT	Red Flag Warning	GRR	17 hr
May 25, 11:22 PM EDT	Mesoscale Discussion	SPC	83 min
May 26, 9:30 PM EDT	Mesoscale Discussion	SPC	2 hr
May 27, 2:11 AM EDT	Frost Advisory	GRR	30 hr
May 31, 7:45 AM EDT	Special Weather Statement	GRR	60 min
Jun 5, 2:38 AM EDT	Mesoscale Discussion	SPC	3 hr
Jun 5, 9:03 AM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 5, 10:16 AM EDT	Special Weather Statement	GRR	119 min
Jun 5, 11:47 AM EDT	Special Weather Statement	GRR	58 min
Jun 6, 1:30 PM EDT	Mesoscale Discussion	SPC	90 min
Jun 6, 2:18 PM EDT	Tornado Watch	SPC	10 hr
Jun 6, 4:18 PM EDT	Severe Thunderstorm Warning	GRR	72 min
Jun 6, 4:23 PM EDT	Severe Thunderstorm Warning	GRR	61 min
Jun 6, 4:27 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 6, 5:20 PM EDT	Severe Thunderstorm Warning	GRR	40 min
Jun 6, 5:31 PM EDT	Severe Thunderstorm Warning	GRR	74 min
Jun 7, 3:27 PM EDT	Mesoscale Discussion	SPC	93 min
Jun 7, 6:42 PM EDT	Tornado Watch	SPC	5 hr
Jun 7, 9:48 PM EDT	Special Weather Statement	GRR	87 min
Jun 7, 10:57 PM EDT	Areal Flood Advisory	GRR	203 days
Jun 8, 3:27 AM EDT	Flood Watch	GRR	48 hr
Jun 8, 12:57 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 8, 1:44 PM EDT	Mesoscale Discussion	SPC	91 min
Jun 8, 2:16 PM EDT	Severe Thunderstorm Warning	GRR	74 min
Jun 8, 3:16 PM EDT	Severe Thunderstorm Warning	GRR	59 min
Jun 8, 11:01 PM EDT	Mesoscale Discussion	SPC	59 min
Jun 9, 1:17 AM EDT	Special Weather Statement	GRR	58 min
Jun 13, 1:57 AM EDT	Tornado Watch	SPC	5 hr
Jun 13, 5:30 AM EDT	Special Weather Statement	GRR	60 min
Jun 13, 12:36 PM EDT	Flash Flood Watch	GRR	8 hr
Jun 13, 2:21 PM EDT	Mesoscale Discussion	SPC	54 min
Jun 13, 2:39 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 13, 5:55 PM EDT	Special Weather Statement	GRR	65 min
Jun 14, 8:13 PM EDT	Mesoscale Discussion	SPC	92 min
Jun 15, 1:25 PM EDT	Mesoscale Discussion	SPC	95 min
Jun 15, 1:38 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 16, 11:48 AM EDT	Special Weather Statement	GRR	57 min
Jun 21, 5:58 PM EDT	Special Weather Statement	GRR	62 min
Jun 22, 11:47 AM EDT	Mesoscale Discussion	SPC	88 min
Jun 22, 12:14 PM EDT	Special Weather Statement	GRR	91 min
Jun 22, 1:46 PM EDT	Special Weather Statement	GRR	59 min
Jun 22, 9:43 PM EDT	Special Weather Statement	GRR	17 min
Jun 27, 9:20 PM EDT	Severe Thunderstorm Warning	GRR	48 min
Jun 28, 11:44 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 3:21 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 28, 4:23 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 11:09 AM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 2, 3:10 PM EDT	Severe Thunderstorm Warning	GRR	65 min
Jul 2, 4:08 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 2, 5:21 PM EDT	Severe Thunderstorm Warning	GRR	40 min
Jul 2, 8:03 PM EDT	Mesoscale Discussion	SPC	57 min
Jul 7, 1:08 PM EDT	Mesoscale Discussion	SPC	97 min
Jul 7, 2:07 PM EDT	Special Weather Statement	GRR	83 min
Jul 12, 6:37 AM EDT	Special Weather Statement	GRR	83 min
Jul 16, 1:42 PM EDT	Mesoscale Discussion	SPC	3 hr
Jul 16, 4:33 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 16, 5:31 PM EDT	Severe Thunderstorm Warning	GRR	44 min
Jul 16, 6:08 PM EDT	Severe Thunderstorm Warning	GRR	52 min
Jul 16, 6:14 PM EDT	Areal Flood Advisory	GRR	5 hr
Jul 16, 6:40 PM EDT	Severe Thunderstorm Warning	GRR	50 min
Jul 16, 8:22 PM EDT	Severe Thunderstorm Warning	GRR	68 min
Jul 16, 9:54 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 22, 2:38 PM EDT	Special Weather Statement	GRR	67 min
Jul 22, 3:42 PM EDT	Special Weather Statement	GRR	63 min
Jul 30, 5:00 AM EDT	Special Weather Statement	GRR	60 min
Aug 1, 1:29 PM EDT	Mesoscale Discussion	SPC	61 min
Aug 1, 2:37 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 6, 7:53 PM EDT	Special Weather Statement	GRR	67 min
Aug 6, 9:26 PM EDT	Special Weather Statement	GRR	94 min
Aug 7, 12:46 PM EDT	Special Weather Statement	GRR	74 min
Aug 7, 2:06 PM EDT	Special Weather Statement	GRR	114 min
Aug 7, 6:24 PM EDT	Special Weather Statement	GRR	66 min
Aug 9, 12:04 PM EDT	Mesoscale Discussion	SPC	86 min
Aug 9, 1:39 PM EDT	Special Weather Statement	GRR	66 min
Aug 9, 2:10 PM EDT	Severe Thunderstorm Warning	GRR	50 min
Aug 17, 5:22 PM EDT	Special Weather Statement	GRR	53 min
Aug 23, 12:47 PM EDT	Mesoscale Discussion	SPC	58 min
Aug 23, 6:52 PM EDT	Special Weather Statement	GRR	68 min
Sep 12, 11:00 PM EDT	Flood Watch	GRR	41 hr
Sep 14, 11:27 AM EDT	Areal Flood Warning	GRR	72 hr
Sep 14, 11:45 AM EDT	Wind Advisory	GRR	9 hr
Sep 26, 12:55 AM EDT	Dense Fog Advisory	GRR	9 hr
Oct 3, 11:37 AM EDT	Freeze Warning	GRR	21 hr
Oct 4, 3:18 PM EDT	Frost Advisory	GRR	18 hr
Oct 9, 3:42 PM EDT	Frost Advisory	GRR	16 hr
Oct 14, 5:40 AM EDT	Special Weather Statement	GRR	110 min
Oct 16, 12:41 PM EDT	Frost Advisory	GRR	21 hr
Oct 18, 2:10 PM EDT	Frost Advisory	GRR	18 hr
Oct 25, 3:44 AM EDT	Wind Advisory	GRR	40 hr
Oct 26, 2:26 PM EDT	Special Weather Statement	GRR	64 min
Oct 26, 3:30 PM EDT	Special Weather Statement	GRR	60 min
Oct 26, 4:36 PM EDT	Special Weather Statement	GRR	84 min
Oct 26, 5:49 PM EDT	Special Weather Statement	GRR	101 min
Nov 3, 1:16 AM EST	Special Weather Statement	GRR	59 min
Nov 24, 5:04 AM EST	Winter Weather Advisory	GRR	26 hr
Nov 29, 3:32 PM EST	Winter Storm Watch	GRR	12 hr
Nov 30, 3:48 AM EST	Winter Storm Warning	GRR	39 hr
Dec 5, 4:16 PM EST	Winter Weather Advisory	GRR	33 hr
Dec 7, 3:44 PM EST	Winter Storm Watch	GRR	24 hr
Dec 8, 3:44 PM EST	Winter Storm Warning	GRR	33 hr
Dec 9, 6:26 AM EST	Mesoscale Discussion	SPC	3 hr
Dec 13, 8:43 PM EST	Winter Weather Advisory	GRR	7 hr
Dec 14, 4:01 PM EST	Wind Advisory	GRR	22 hr
Dec 15, 2:37 AM EST	Winter Weather Advisory	GRR	19 hr
Dec 16, 3:34 AM EST	Winter Weather Advisory	GRR	25 hr
Dec 16, 4:16 PM EST	Winter Storm Watch	GRR	36 hr
Dec 18, 4:05 AM EST	Winter Storm Warning	GRR	38 hr
Dec 19, 7:22 AM EST	Mesoscale Discussion	SPC	5 hr
Dec 19, 3:27 PM EST	Winter Storm Watch	GRR	24 hr
Dec 20, 3:32 PM EST	Winter Weather Advisory	GRR	36 hr
Dec 22, 4:04 PM EST	Winter Storm Watch	GRR	20 hr
Dec 23, 3:36 AM EST	Winter Weather Advisory	GRR	43 hr
Dec 25, 3:32 PM EST	Flood Watch	GRR	45 hr
Dec 25, 3:37 PM EST	Winter Weather Advisory	GRR	21 hr
Dec 26, 3:32 PM EST	Dense Fog Advisory	GRR	27 hr
Dec 27, 4:14 AM EST	Wind Advisory	GRR	22 hr
Dec 27, 10:44 AM EST	Areal Flood Warning	GRR	47 hr
Dec 27, 6:15 PM EST	Special Weather Statement	GRR	60 min
Dec 27, 6:45 PM EST	Special Weather Statement	GRR	45 min
Dec 28, 2:00 AM EST	High Wind Warning	GRR	10 hr
Dec 28, 8:06 AM EST	River Flood Warning	GRR	8 hr
Dec 28, 11:55 AM EST	Wind Advisory	GRR	4 hr
Dec 29, 9:46 AM EST	Wind Advisory	GRR	11 hr
Dec 30, 4:09 AM EST	Winter Weather Advisory	GRR	24 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	1
Severe Thunderstorm Watch	9
Tornado Watch	6
Mesoscale Discussion	30
Special Weather Statement	39
Flooding
Areal Flood Warning	2
River Flood Warning	1
Flash Flood Watch	1
Flood Watch	4
Areal Flood Advisory	2
Winter
Heavy Snow Warning	1
Winter Storm Warning	5
Winter Storm Watch	9
Freezing Rain Advisory	2
Snow Advisory	5
Winter Weather Advisory	14
Cold
Freeze Warning	2
Frost Advisory	6
Wind Chill Advisory	2
Wind and dust
High Wind Warning	1
Wind Advisory	8
Fire
Red Flag Warning	2
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	3
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 2007 2009

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.