Alert archive / Michigan / Ottawa County

Weather alerts in Ottawa County, Michigan, 2008

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

Ottawa County and its neighbors

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

Alerts: 191
Warnings: 48
Watches: 35
Advisories: 46
Busiest month: June38 alerts
Busiest day: June 8, 200811 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Ottawa County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	21	15	29%	13	92%	38 min
Flash flood warnings	1	1	0%	4	100%	87 min

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 1, 10:38 AM EST	Lake Effect Snow Warning	GRR	25 hr
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, 9:54 AM EST	Special Weather Statement	GRR	36 min
Jan 7, 6:09 PM EST	Mesoscale Discussion	SPC	96 min
Jan 7, 7:01 PM EST	Tornado Watch	SPC	5 hr
Jan 8, 4:39 PM EST	Wind Advisory	GRR	12 hr
Jan 17, 3:29 PM EST	Winter Storm Watch	GRR	13 hr
Jan 17, 9:38 PM EST	Wind Advisory	GRR	7 hr
Jan 18, 4:23 AM EST	Winter Weather Advisory	GRR	54 hr
Jan 20, 2:59 PM EST	Winter Storm Watch	GRR	13 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 22, 4:12 PM EST	Lake Effect Snow Warning	GRR	45 hr
Jan 28, 11:42 PM EST	Winter Storm Watch	GRR	12 hr
Jan 29, 3:45 AM EST	Winter Storm Warning	GRR	32 hr
Jan 29, 7:15 PM EST	Mesoscale Discussion	SPC	4 hr
Jan 30, 4:19 AM EST	Winter Storm Watch	GRR	23 hr
Jan 30, 12:19 PM EST	Blowing Snow Advisory	GRR	6 hr
Jan 31, 3:27 AM EST	Heavy Snow Warning	GRR	37 hr
Jan 31, 3:27 AM EST	Snow Advisory	GRR	9 hr
Jan 31, 4:08 PM EST	Flood Watch	GRR	6 days
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, 10:10 AM EST	Dense Fog Advisory	GRR	22 hr
Feb 4, 4:02 PM EST	Winter Storm Watch	GRR	23 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 12, 2:25 PM EST	Snow Advisory	GRR	8 hr
Feb 16, 3:41 PM EST	Freezing Rain Advisory	GRR	21 hr
Feb 17, 3:28 PM EST	Special Weather Statement	GRR	62 min
Feb 18, 4:30 AM EST	Lake Effect Snow Warning	GRR	55 hr
Feb 24, 4:03 PM EST	Winter Storm Watch	GRR	24 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 21, 4:07 AM EDT	Snow Advisory	GRR	23 hr
Mar 21, 4:07 AM EDT	Winter Storm Warning	GRR	23 hr
Mar 21, 4:05 PM EDT	Mesoscale Discussion	SPC	3 hr
Mar 25, 4:34 AM EDT	Wind Advisory	GRR	13 hr
Mar 31, 3:20 PM EDT	Wind Advisory	GRR	24 hr
Apr 10, 12:56 PM EDT	Flood Watch	GRR	14 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, 1:27 PM EDT	Severe Thunderstorm Warning	GRR	48 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, 1:33 PM EDT	Special Weather Statement	GRR	57 min
Apr 25, 2:02 PM EDT	Special Weather Statement	GRR	73 min
Apr 25, 10:02 PM EDT	Special Weather Statement	GRR	28 min
Apr 29, 3:47 AM EDT	Freeze Warning	GRR	28 hr
May 2, 12:37 PM EDT	Special Weather Statement	GRR	38 min
May 2, 8:50 PM EDT	Mesoscale Discussion	SPC	85 min
May 2, 9:13 PM EDT	Tornado Watch	SPC	3 hr
May 2, 9:31 PM EDT	Special Weather Statement	GRR	89 min
May 2, 9:56 PM EDT	Severe Thunderstorm Warning	GRR	49 min
May 13, 8:11 PM EDT	Mesoscale Discussion	SPC	2 hr
May 17, 4:10 PM EDT	Special Weather Statement	GRR	65 min
May 17, 4:54 PM EDT	Severe Thunderstorm Warning	GRR	51 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, 1:09 AM EDT	Special Weather Statement	GRR	96 min
May 27, 2:11 AM EDT	Frost Advisory	GRR	30 hr
May 31, 6:16 AM EDT	Special Weather Statement	GRR	29 min
May 31, 6:24 AM EDT	Severe Thunderstorm Warning	GRR	34 min
Jun 5, 2:38 AM EDT	Mesoscale Discussion	SPC	3 hr
Jun 5, 7:46 AM EDT	Mesoscale Discussion	SPC	119 min
Jun 5, 9:02 AM EDT	Special Weather Statement	GRR	88 min
Jun 5, 9:03 AM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 5, 9:05 AM EDT	Special Weather Statement	GRR	85 min
Jun 5, 10:16 AM EDT	Special Weather Statement	GRR	119 min
Jun 5, 10:27 AM EDT	Severe Thunderstorm Warning	GRR	67 min
Jun 6, 1:57 PM EDT	Special Weather Statement	GRR	78 min
Jun 6, 2:18 PM EDT	Tornado Watch	SPC	10 hr
Jun 6, 3:38 PM EDT	Severe Thunderstorm Warning	GRR	52 min
Jun 7, 3:27 PM EDT	Mesoscale Discussion	SPC	93 min
Jun 7, 6:39 PM EDT	Special Weather Statement	GRR	66 min
Jun 7, 6:42 PM EDT	Tornado Watch	SPC	5 hr
Jun 7, 7:33 PM EDT	Areal Flood Advisory	GRR	191 days
Jun 7, 7:34 PM EDT	Mesoscale Discussion	SPC	56 min
Jun 7, 7:41 PM EDT	Special Weather Statement	GRR	64 min
Jun 7, 8:16 PM EDT	Severe Thunderstorm Warning	GRR	44 min
Jun 7, 9:00 PM EDT	Severe Thunderstorm Warning	GRR	60 min
Jun 7, 9:57 PM EDT	Mesoscale Discussion	SPC	63 min
Jun 7, 9:58 PM EDT	Flash Flood Warning	GRR	6 hr
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, 4:01 AM EDT	Areal Flood Warning	GRR	56 hr
Jun 8, 9:29 AM EDT	Special Weather Statement	GRR	61 min
Jun 8, 12:57 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 8, 1:26 PM EDT	Severe Thunderstorm Warning	GRR	64 min
Jun 8, 2:16 PM EDT	Severe Thunderstorm Warning	GRR	74 min
Jun 8, 11:01 PM EDT	Mesoscale Discussion	SPC	59 min
Jun 13, 1:57 AM EDT	Tornado Watch	SPC	5 hr
Jun 13, 3:35 AM EDT	Severe Thunderstorm Warning	GRR	42 min
Jun 13, 12:36 PM EDT	Flash Flood Watch	GRR	8 hr
Jun 14, 8:13 PM EDT	Mesoscale Discussion	SPC	92 min
Jun 15, 1:38 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 22, 11:36 AM EDT	Special Weather Statement	GRR	54 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
Jun 28, 5:35 PM EDT	Severe Thunderstorm Warning	GRR	70 min
Jul 2, 10:42 AM EDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 11:09 AM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 2, 1:57 PM EDT	Severe Thunderstorm Warning	GRR	63 min
Jul 2, 2:40 PM EDT	Severe Thunderstorm Warning	GRR	65 min
Jul 2, 2:55 PM EDT	Mesoscale Discussion	SPC	95 min
Jul 2, 3:00 PM EDT	Severe Thunderstorm Warning	GRR	26 min
Jul 2, 3:52 PM EDT	Severe Thunderstorm Warning	GRR	53 min
Jul 2, 4:08 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 2, 4:46 PM EDT	Severe Thunderstorm Warning	GRR	44 min
Jul 2, 5:16 PM EDT	Severe Thunderstorm Warning	GRR	59 min
Jul 2, 5:23 PM EDT	Lakeshore Flood Statement	GRR	7 hr
Jul 2, 8:03 PM EDT	Mesoscale Discussion	SPC	57 min
Jul 2, 9:06 PM EDT	Areal Flood Advisory	GRR	6 hr
Jul 7, 11:10 AM EDT	Special Weather Statement	GRR	65 min
Jul 7, 12:10 PM EDT	Special Weather Statement	GRR	65 min
Jul 7, 8:47 PM EDT	Mesoscale Discussion	SPC	88 min
Jul 12, 5:22 AM EDT	Special Weather Statement	GRR	53 min
Jul 16, 4:33 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 16, 6:57 PM EDT	Severe Thunderstorm Warning	GRR	78 min
Jul 22, 2:38 PM EDT	Special Weather Statement	GRR	67 min
Jul 22, 3:09 PM EDT	Severe Thunderstorm Warning	GRR	49 min
Jul 22, 3:42 PM EDT	Special Weather Statement	GRR	63 min
Jul 30, 5:17 AM EDT	Severe Thunderstorm Warning	GRR	46 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 4, 7:16 AM EDT	Special Weather Statement	GRR	89 min
Aug 6, 7:53 PM EDT	Special Weather Statement	GRR	67 min
Aug 7, 12:02 PM EDT	Special Weather Statement	GRR	88 min
Aug 7, 2:06 PM EDT	Special Weather Statement	GRR	114 min
Aug 14, 3:24 PM EDT	Special Weather Statement	GRR	66 min
Sep 12, 11:00 PM EDT	Flood Watch	GRR	41 hr
Sep 14, 12:35 AM EDT	River Flood Warning	GRR	58 hr
Sep 14, 11:27 AM EDT	Areal Flood Warning	GRR	72 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 16, 12:41 PM EDT	Frost Advisory	GRR	21 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
Oct 26, 7:27 PM EDT	Special Weather Statement	GRR	63 min
Oct 26, 8:00 PM EDT	Wind Advisory	GRR	2 hr
Nov 17, 4:22 AM EST	Lake Effect Snow Advisory	GRR	21 hr
Nov 17, 9:57 AM EST	Lake Effect Snow Warning	GRR	15 hr
Nov 20, 3:38 AM EST	Lake Effect Snow Advisory	GRR	33 hr
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 1, 1:37 AM EST	Mesoscale Discussion	SPC	4 hr
Dec 4, 1:10 PM EST	Lake Effect Snow Advisory	GRR	30 hr
Dec 5, 3:44 AM EST	Winter Storm Watch	GRR	13 hr
Dec 5, 9:36 AM EST	Lake Effect Snow Warning	GRR	9 hr
Dec 5, 4:16 PM EST	Winter Storm Warning	GRR	35 hr
Dec 7, 3:44 PM EST	Winter Storm Watch	GRR	24 hr
Dec 8, 3:44 PM EST	Winter Weather Advisory	GRR	33 hr
Dec 8, 10:40 PM EST	Mesoscale Discussion	SPC	2 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, 12:38 AM EST	Mesoscale Discussion	SPC	4 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 Storm Warning	GRR	36 hr
Dec 21, 4:00 PM EST	Blizzard Warning	GRR	11 hr
Dec 22, 3:28 AM EST	Lake Effect Snow Advisory	GRR	15 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 23, 11:36 AM EST	Winter Storm Warning	GRR	35 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, 9:53 AM EST	River Flood Warning	GRR	10 days
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, 4:27 PM EST	Winter Weather Advisory	GRR	19 hr
Dec 27, 4:28 PM EST	Special Weather Statement	GRR	77 min
Dec 28, 2:00 AM EST	High Wind Warning	GRR	10 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	21
Severe Thunderstorm Watch	8
Tornado Watch	6
Mesoscale Discussion	27
Special Weather Statement	34
Flooding
Areal Flood Warning	3
Flash Flood Warning	1
River Flood Warning	2
Flash Flood Watch	1
Flood Watch	6
Areal Flood Advisory	3
Winter
Blizzard Warning	1
Heavy Snow Warning	1
Lake Effect Snow Warning	5
Winter Storm Warning	9
Winter Storm Watch	12
Blowing Snow Advisory	1
Freezing Rain Advisory	2
Lake Effect Snow Advisory	4
Snow Advisory	6
Winter Weather Advisory	12
Cold
Freeze Warning	2
Frost Advisory	5
Wind and dust
High Wind Warning	1
Wind Advisory	10
Fire
Red Flag Warning	2
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	3
Coast and beach
Lakeshore Flood Statement	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.