Alert archive / Michigan / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Michigan, 2010

310 severe thunderstorm warnings in 2010. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

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

Severe Thunderstorm Warnings: 310
Busiest month: July106 severe thunderstorm warnings
Busiest day: July 15, 201028 severe thunderstorm warnings

Over time

By month

Warning verification

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

169 of 311 severe thunderstorm warnings covering Michigan in 2010 had a qualifying storm report inside them; 398 of 558 hail, wind and damage reports fell inside a warning, on average 26 minutes after it went out.

Michigan, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	311	169	46%	558	71%	26 min

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Marquette, MI: severe thunderstorm warnings	36	14	61%	29	72%	19 min
NWS Gaylord, MI: severe thunderstorm warnings	40	13	68%	33	55%	22 min
NWS Northern Indiana: severe thunderstorm warnings	163	98	40%	407	68%	29 min
NWS Green Bay, WI: severe thunderstorm warnings	92	60	35%	147	74%	23 min
NWS Grand Rapids, MI: severe thunderstorm warnings	91	47	48%	186	70%	26 min
NWS Detroit, MI: severe thunderstorm warnings	96	63	34%	231	76%	27 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	Counties	Lasted
Apr 5, 11:29 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Kalamazoo, Van Buren	46 min
Apr 5, 11:38 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	37 min
Apr 6, 12:01 AM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale, Saint Joseph	59 min
Apr 6, 12:09 AM EDT	Severe Thunderstorm Warning	GRR	Barry, Calhoun, Eaton, Ingham, Jackson, Kalamazoo	51 min
Apr 6, 12:37 AM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	53 min
Apr 6, 12:48 AM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Clinton, Eaton, Ingham, Ionia, Jackson	42 min
Apr 6, 12:55 AM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Washtenaw	42 min
Apr 6, 9:41 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kalamazoo, Van Buren	49 min
Apr 6, 9:45 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kent, Muskegon, Ottawa	45 min
Apr 6, 9:56 AM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	49 min
Apr 6, 10:27 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Calhoun, Eaton, Ionia, Kalamazoo and 2 more	48 min
Apr 6, 11:02 AM EDT	Severe Thunderstorm Warning	GRR	Clinton, Eaton, Ingham, Ionia	43 min
Apr 6, 11:23 AM EDT	Severe Thunderstorm Warning	DTX	Genesee, Shiawassee	52 min
Apr 6, 11:28 AM EDT	Severe Thunderstorm Warning	DTX	Livingston, Washtenaw	48 min
Apr 6, 11:55 AM EDT	Severe Thunderstorm Warning	DTX	Oakland	50 min
Apr 6, 12:31 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair	32 min
Apr 6, 11:54 PM EDT	Severe Thunderstorm Warning	GRR	Lake, Mason, Newaygo, Oceana	36 min
Apr 7, 12:43 AM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella, Lake, Mecosta, Newaygo, Osceola	47 min
Apr 30, 5:54 PM EDT	Severe Thunderstorm Warning	MQT	Houghton, Ontonagon	58 min
Apr 30, 6:06 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic, Houghton, Iron, Ontonagon	39 min
Apr 30, 6:26 PM EDT	Severe Thunderstorm Warning	MQT	Iron	39 min
Apr 30, 9:48 PM EDT	Severe Thunderstorm Warning	GRR	Mason, Oceana	27 min
Apr 30, 11:06 PM EDT	Severe Thunderstorm Warning	APX	Grand Traverse, Kalkaska, Missaukee, Wexford	43 min
May 1, 6:29 AM EDT	Severe Thunderstorm Warning	DTX	Monroe, Wayne	46 min
May 1, 6:52 AM EDT	Severe Thunderstorm Warning	DTX	Wayne	38 min
May 5, 3:44 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	28 min
May 7, 5:22 PM EDT	Severe Thunderstorm Warning	GRR	Eaton, Ingham	23 min
May 7, 5:33 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale, Saint Joseph	57 min
May 7, 6:48 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe, Washtenaw, Wayne	44 min
May 21, 3:24 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	51 min
May 21, 4:02 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Saint Joseph	43 min
May 21, 5:24 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	51 min
May 21, 6:49 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Washtenaw	41 min
May 25, 3:20 PM EDT	Severe Thunderstorm Warning	MQT	Ontonagon	55 min
May 25, 3:40 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic, Ontonagon	52 min
May 25, 4:25 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic, Ontonagon	35 min
May 25, 4:59 PM EDT	Severe Thunderstorm Warning	MQT	Ontonagon	46 min
May 31, 6:41 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kent, Montcalm, Ottawa	64 min
May 31, 7:13 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kent, Muskegon, Ottawa, Van Buren	12 min
May 31, 9:52 AM EDT	Severe Thunderstorm Warning	APX	Alcona, Arenac, Gladwin, Iosco, Ogemaw, Oscoda	53 min
May 31, 12:07 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Washtenaw	68 min
May 31, 12:15 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe	75 min
May 31, 1:05 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	40 min
May 31, 2:04 PM EDT	Severe Thunderstorm Warning	GRR	Kent	41 min
May 31, 2:22 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	38 min
May 31, 2:56 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	30 min
May 31, 3:41 PM EDT	Severe Thunderstorm Warning	APX	Arenac, Iosco, Ogemaw	34 min
May 31, 4:36 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	54 min
May 31, 4:43 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	62 min
Jun 2, 5:10 AM EDT	Severe Thunderstorm Warning	IWX	Berrien	65 min
Jun 4, 6:45 PM EDT	Severe Thunderstorm Warning	GRR	Clinton, Eaton, Ingham	60 min
Jun 4, 6:59 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Shiawassee	76 min
Jun 4, 7:14 PM EDT	Severe Thunderstorm Warning	GRR	Eaton	33 min
Jun 4, 7:39 PM EDT	Severe Thunderstorm Warning	DTX	Livingston	49 min
Jun 4, 8:18 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	14 min
Jun 4, 8:26 PM EDT	Severe Thunderstorm Warning	DTX	Oakland, Wayne	64 min
Jun 4, 8:28 PM EDT	Severe Thunderstorm Warning	DTX	Washtenaw	48 min
Jun 5, 11:16 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	59 min
Jun 5, 11:55 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	65 min
Jun 6, 12:19 AM EDT	Severe Thunderstorm Warning	GRR	Kalamazoo	20 min
Jun 6, 12:41 AM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale, Saint Joseph	54 min
Jun 6, 12:48 AM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Jackson	42 min
Jun 6, 12:52 AM EDT	Severe Thunderstorm Warning	DTX	Wayne	36 min
Jun 6, 1:13 AM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	62 min
Jun 6, 1:26 AM EDT	Severe Thunderstorm Warning	DTX	Lenawee	64 min
Jun 9, 1:52 PM EDT	Severe Thunderstorm Warning	MQT	Alger, Luce	38 min
Jun 9, 2:19 PM EDT	Severe Thunderstorm Warning	MQT	Schoolcraft	56 min
Jun 9, 2:25 PM EDT	Severe Thunderstorm Warning	MQT	Luce	65 min
Jun 9, 2:31 PM EDT	Severe Thunderstorm Warning	MQT	Schoolcraft	44 min
Jun 9, 4:15 PM EDT	Severe Thunderstorm Warning	APX	Emmet	30 min
Jun 9, 4:38 PM EDT	Severe Thunderstorm Warning	APX	Cheboygan, Emmet	27 min
Jun 11, 8:26 PM EDT	Severe Thunderstorm Warning	APX	Benzie, Grand Traverse, Leelanau	49 min
Jun 18, 5:51 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	54 min
Jun 18, 6:16 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Ottawa, Van Buren	59 min
Jun 18, 6:41 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass, Saint Joseph	64 min
Jun 18, 7:00 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Kalamazoo	60 min
Jun 18, 7:29 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Saint Joseph	61 min
Jun 18, 7:33 PM EDT	Severe Thunderstorm Warning	GRR	Barry, Calhoun, Eaton	57 min
Jun 18, 7:39 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Ionia, Kent	66 min
Jun 18, 8:04 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	56 min
Jun 18, 8:08 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	82 min
Jun 18, 8:12 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Eaton, Ingham, Jackson	63 min
Jun 18, 8:13 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	62 min
Jun 18, 8:23 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	48 min
Jun 18, 8:29 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Washtenaw	91 min
Jun 18, 8:39 PM EDT	Severe Thunderstorm Warning	GRR	Ingham, Jackson	36 min
Jun 18, 9:15 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Shiawassee	63 min
Jun 18, 9:21 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	84 min
Jun 18, 9:26 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe	79 min
Jun 18, 9:29 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	76 min
Jun 18, 9:47 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	41 min
Jun 18, 9:57 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair	55 min
Jun 18, 11:39 PM EDT	Severe Thunderstorm Warning	IWX	Berrien	66 min
Jun 22, 12:24 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kent, Muskegon, Ottawa	66 min
Jun 22, 1:12 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Kent, Ottawa	48 min
Jun 22, 1:35 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Eaton, Ionia, Kent, Montcalm	40 min
Jun 22, 1:58 AM EDT	Severe Thunderstorm Warning	GRR	Barry, Clinton, Eaton, Ingham, Ionia	62 min
Jun 22, 2:23 AM EDT	Severe Thunderstorm Warning	GRR	Barry, Calhoun, Eaton, Ingham, Jackson	67 min
Jun 22, 2:49 AM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe	56 min
Jun 22, 8:53 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic	52 min
Jun 22, 9:17 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic, Ontonagon	43 min
Jun 23, 4:08 AM EDT	Severe Thunderstorm Warning	MQT	Gogebic	67 min
Jun 23, 7:21 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kent, Muskegon, Newaygo, Oceana, Ottawa	54 min
Jun 23, 8:06 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kalamazoo, Van Buren	54 min
Jun 23, 10:34 AM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	56 min
Jun 23, 10:43 AM EDT	Severe Thunderstorm Warning	IWX	Berrien	47 min
Jun 23, 11:50 AM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair	33 min
Jun 23, 12:03 PM EDT	Severe Thunderstorm Warning	DTX	Monroe	27 min
Jun 23, 7:40 PM EDT	Severe Thunderstorm Warning	MQT	Menominee	59 min
Jun 23, 7:48 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	57 min
Jun 23, 8:21 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Jackson	54 min
Jun 23, 8:28 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	62 min
Jun 23, 9:11 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Saint Joseph	64 min
Jun 23, 9:14 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	46 min
Jun 23, 9:17 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Jackson	58 min
Jun 23, 9:36 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	54 min
Jun 23, 9:53 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	67 min
Jun 23, 10:03 PM EDT	Severe Thunderstorm Warning	APX	Benzie, Leelanau, Manistee	42 min
Jun 23, 10:23 PM EDT	Severe Thunderstorm Warning	DTX	Monroe	51 min
Jun 23, 10:56 PM EDT	Severe Thunderstorm Warning	APX	Benzie, Manistee, Wexford	64 min
Jun 27, 7:30 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kent, Muskegon, Ottawa	45 min
Jun 27, 11:27 AM EDT	Severe Thunderstorm Warning	IWX	Berrien	63 min
Jun 27, 12:10 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	65 min
Jun 27, 12:32 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Van Buren	43 min
Jun 27, 1:23 PM EDT	Severe Thunderstorm Warning	GRR	Eaton, Ingham, Jackson	56 min
Jun 27, 1:30 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	30 min
Jun 27, 1:49 PM EDT	Severe Thunderstorm Warning	DTX	Livingston	55 min
Jun 28, 9:20 AM EDT	Severe Thunderstorm Warning	APX	Charlevoix, Cheboygan, Emmet	25 min
Jun 28, 10:26 AM EDT	Severe Thunderstorm Warning	APX	Alpena, Montmorency, Presque Isle	79 min
Jul 8, 6:09 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe	74 min
Jul 10, 5:11 PM EDT	Severe Thunderstorm Warning	APX	Ogemaw	34 min
Jul 10, 5:38 PM EDT	Severe Thunderstorm Warning	GRR	Clinton, Gratiot, Ionia, Montcalm	37 min
Jul 10, 5:45 PM EDT	Severe Thunderstorm Warning	APX	Ogemaw	30 min
Jul 10, 6:38 PM EDT	Severe Thunderstorm Warning	APX	Arenac, Gladwin, Ogemaw	41 min
Jul 10, 7:17 PM EDT	Severe Thunderstorm Warning	APX	Gladwin, Roscommon	28 min
Jul 11, 1:57 PM EDT	Severe Thunderstorm Warning	APX	Alpena, Presque Isle	48 min
Jul 14, 12:59 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic	61 min
Jul 14, 4:31 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic	44 min
Jul 15, 1:41 PM EDT	Severe Thunderstorm Warning	APX	Iosco, Ogemaw	64 min
Jul 15, 1:59 PM EDT	Severe Thunderstorm Warning	APX	Arenac, Gladwin	61 min
Jul 15, 2:49 PM EDT	Severe Thunderstorm Warning	GRR	Gratiot	25 min
Jul 15, 2:55 PM EDT	Severe Thunderstorm Warning	DTX	Bay	50 min
Jul 15, 2:57 PM EDT	Severe Thunderstorm Warning	APX	Arenac	63 min
Jul 15, 3:09 PM EDT	Severe Thunderstorm Warning	DTX	Huron	96 min
Jul 15, 3:16 PM EDT	Severe Thunderstorm Warning	GRR	Clinton, Gratiot	44 min
Jul 15, 3:39 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Saginaw	42 min
Jul 15, 3:42 PM EDT	Severe Thunderstorm Warning	GRR	Clinton	35 min
Jul 15, 3:49 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun	41 min
Jul 15, 3:55 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw	28 min
Jul 15, 3:57 PM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	78 min
Jul 15, 4:08 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Kalamazoo	52 min
Jul 15, 4:10 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	48 min
Jul 15, 4:29 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Jackson, Kalamazoo	46 min
Jul 15, 4:31 PM EDT	Severe Thunderstorm Warning	DTX	Genesee	59 min
Jul 15, 4:51 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Livingston, Shiawassee	54 min
Jul 15, 4:58 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	77 min
Jul 15, 5:10 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	80 min
Jul 15, 5:12 PM EDT	Severe Thunderstorm Warning	DTX	Livingston	66 min
Jul 15, 5:16 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Ingham, Jackson	44 min
Jul 15, 5:18 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Tuscola	29 min
Jul 15, 5:20 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair, Sanilac	70 min
Jul 15, 5:42 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	51 min
Jul 15, 5:46 PM EDT	Severe Thunderstorm Warning	DTX	Washtenaw	74 min
Jul 15, 5:52 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	73 min
Jul 15, 6:00 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair, Wayne	90 min
Jul 15, 6:09 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	81 min
Jul 17, 1:20 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Macomb, Oakland, Saint Clair	55 min
Jul 17, 2:26 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair	49 min
Jul 18, 2:41 PM EDT	Severe Thunderstorm Warning	IWX	Berrien	64 min
Jul 18, 3:02 PM EDT	Severe Thunderstorm Warning	IWX	Berrien	45 min
Jul 18, 3:18 PM EDT	Severe Thunderstorm Warning	GRR	Van Buren	35 min
Jul 18, 3:23 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	46 min
Jul 18, 3:45 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry	60 min
Jul 18, 3:49 PM EDT	Severe Thunderstorm Warning	GRR	Kent	41 min
Jul 18, 4:14 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Ionia, Kent	46 min
Jul 18, 4:32 PM EDT	Severe Thunderstorm Warning	GRR	Allegan	43 min
Jul 18, 5:15 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	60 min
Jul 18, 5:37 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	19 min
Jul 18, 5:45 PM EDT	Severe Thunderstorm Warning	DTX	Monroe, Washtenaw	43 min
Jul 18, 6:15 PM EDT	Severe Thunderstorm Warning	DTX	Monroe, Wayne	42 min
Jul 18, 6:21 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	13 min
Jul 18, 7:51 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair	26 min
Jul 18, 8:02 PM EDT	Severe Thunderstorm Warning	APX	Arenac, Gladwin, Ogemaw, Roscommon	58 min
Jul 18, 9:03 PM EDT	Severe Thunderstorm Warning	DTX	Bay	42 min
Jul 18, 9:12 PM EDT	Severe Thunderstorm Warning	APX	Arenac	33 min
Jul 18, 10:11 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Sanilac, Tuscola	57 min
Jul 19, 1:27 PM EDT	Severe Thunderstorm Warning	MQT	Marquette	50 min
Jul 19, 2:23 PM EDT	Severe Thunderstorm Warning	MQT	Marquette	52 min
Jul 19, 2:51 PM EDT	Severe Thunderstorm Warning	MQT	Alger	54 min
Jul 20, 3:11 PM EDT	Severe Thunderstorm Warning	APX	Chippewa	64 min
Jul 20, 4:13 PM EDT	Severe Thunderstorm Warning	MQT	Dickinson	62 min
Jul 20, 4:53 PM EDT	Severe Thunderstorm Warning	MQT	Alger	31 min
Jul 22, 4:03 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Calhoun, Eaton, Kalamazoo	42 min
Jul 22, 4:23 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Kalamazoo, Van Buren	52 min
Jul 22, 5:14 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Jackson	46 min
Jul 22, 9:13 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Ottawa	62 min
Jul 22, 10:15 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kalamazoo, Van Buren	45 min
Jul 22, 10:57 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Calhoun, Kalamazoo, Van Buren	48 min
Jul 22, 11:37 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Jackson, Kalamazoo	38 min
Jul 22, 11:59 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Kalamazoo, Van Buren	61 min
Jul 23, 12:35 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kalamazoo, Van Buren	40 min
Jul 23, 1:48 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Washtenaw, Wayne	31 min
Jul 23, 5:01 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Kalamazoo	44 min
Jul 23, 5:32 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	31 min
Jul 23, 5:41 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Washtenaw	48 min
Jul 23, 5:42 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	28 min
Jul 23, 6:08 PM EDT	Severe Thunderstorm Warning	DTX	Washtenaw	39 min
Jul 23, 6:14 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	55 min
Jul 23, 6:16 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	29 min
Jul 23, 6:31 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Washtenaw	29 min
Jul 23, 7:44 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	35 min
Jul 23, 7:48 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	57 min
Jul 23, 8:01 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	59 min
Jul 23, 8:13 PM EDT	Severe Thunderstorm Warning	IWX	Branch	47 min
Jul 23, 8:32 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	58 min
Jul 23, 9:04 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	56 min
Jul 23, 9:16 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	21 min
Jul 24, 8:21 AM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	54 min
Jul 27, 8:55 PM EDT	Severe Thunderstorm Warning	MQT	Dickinson, Menominee	50 min
Jul 27, 9:12 PM EDT	Severe Thunderstorm Warning	MQT	Dickinson, Iron, Marquette	33 min
Jul 27, 9:38 PM EDT	Severe Thunderstorm Warning	MQT	Iron	52 min
Jul 27, 11:21 PM EDT	Severe Thunderstorm Warning	MQT	Schoolcraft	36 min
Jul 28, 12:28 AM EDT	Severe Thunderstorm Warning	APX	Charlevoix	37 min
Jul 28, 1:13 AM EDT	Severe Thunderstorm Warning	APX	Leelanau	47 min
Jul 28, 1:09 PM EDT	Severe Thunderstorm Warning	GRR	Eaton, Ingham, Jackson	12 min
Jul 28, 1:54 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Jackson, Kalamazoo	51 min
Jul 28, 2:08 PM EDT	Severe Thunderstorm Warning	DTX	Livingston	16 min
Jul 28, 2:12 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair	48 min
Jul 28, 2:17 PM EDT	Severe Thunderstorm Warning	DTX	Oakland, Wayne	43 min
Jul 28, 2:34 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	41 min
Jul 28, 2:42 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Wayne	48 min
Jul 28, 2:52 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	53 min
Jul 28, 3:02 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe	43 min
Jul 28, 3:10 PM EDT	Severe Thunderstorm Warning	DTX	Monroe, Washtenaw, Wayne	80 min
Jul 28, 3:37 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe	42 min
Aug 3, 7:50 PM EDT	Severe Thunderstorm Warning	MQT	Alger, Schoolcraft	40 min
Aug 4, 8:48 AM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	57 min
Aug 4, 9:31 AM EDT	Severe Thunderstorm Warning	GRR	Van Buren	44 min
Aug 8, 5:35 AM EDT	Severe Thunderstorm Warning	APX	Benzie, Grand Traverse, Manistee, Wexford	55 min
Aug 9, 6:40 AM EDT	Severe Thunderstorm Warning	GRR	Muskegon, Ottawa	50 min
Aug 9, 6:49 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Van Buren	41 min
Aug 11, 8:39 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Ottawa	51 min
Aug 11, 9:28 AM EDT	Severe Thunderstorm Warning	GRR	Allegan	62 min
Aug 11, 9:46 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Kalamazoo, Van Buren	44 min
Aug 11, 11:48 AM EDT	Severe Thunderstorm Warning	GRR	Ingham	42 min
Aug 13, 8:14 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic, Ontonagon	61 min
Aug 13, 9:26 PM EDT	Severe Thunderstorm Warning	MQT	Baraga, Gogebic, Houghton, Iron, Ontonagon	64 min
Aug 15, 2:32 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Oakland	55 min
Aug 15, 2:54 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Wayne	81 min
Aug 19, 2:24 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Sanilac, Tuscola	66 min
Aug 19, 3:26 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Tuscola	40 min
Aug 19, 4:55 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland, Saginaw	65 min
Aug 19, 5:32 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	44 min
Aug 19, 6:24 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	47 min
Aug 19, 6:31 PM EDT	Severe Thunderstorm Warning	DTX	Genesee	29 min
Aug 19, 6:42 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	48 min
Aug 20, 11:29 AM EDT	Severe Thunderstorm Warning	MQT	Gogebic	61 min
Aug 20, 2:44 PM EDT	Severe Thunderstorm Warning	MQT	Delta, Schoolcraft	61 min
Aug 20, 4:22 PM EDT	Severe Thunderstorm Warning	APX	Cheboygan, Emmet, Mackinac	33 min
Aug 20, 6:14 PM EDT	Severe Thunderstorm Warning	MQT	Menominee	31 min
Aug 20, 6:40 PM EDT	Severe Thunderstorm Warning	APX	Chippewa, Mackinac	35 min
Aug 20, 6:43 PM EDT	Severe Thunderstorm Warning	MQT	Luce, Schoolcraft	47 min
Aug 20, 6:51 PM EDT	Severe Thunderstorm Warning	APX	Mackinac	27 min
Aug 20, 7:16 PM EDT	Severe Thunderstorm Warning	APX	Benzie, Grand Traverse, Leelanau	54 min
Aug 20, 7:54 PM EDT	Severe Thunderstorm Warning	APX	Chippewa, Mackinac	51 min
Aug 20, 7:55 PM EDT	Severe Thunderstorm Warning	APX	Antrim, Charlevoix, Emmet	44 min
Sep 2, 1:05 PM EDT	Severe Thunderstorm Warning	MQT	Delta	40 min
Sep 2, 11:55 PM EDT	Severe Thunderstorm Warning	GRR	Muskegon, Ottawa	35 min
Sep 3, 12:17 AM EDT	Severe Thunderstorm Warning	GRR	Kent, Montcalm, Ottawa	28 min
Sep 3, 12:25 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Ionia, Kent, Ottawa	35 min
Sep 3, 12:41 AM EDT	Severe Thunderstorm Warning	GRR	Barry, Ionia, Kent, Mecosta, Montcalm	34 min
Sep 7, 1:22 AM EDT	Severe Thunderstorm Warning	MQT	Menominee	23 min
Sep 7, 6:44 AM EDT	Severe Thunderstorm Warning	APX	Montmorency, Otsego, Presque Isle	41 min
Sep 12, 4:52 PM EDT	Severe Thunderstorm Warning	APX	Chippewa	53 min
Sep 12, 5:18 PM EDT	Severe Thunderstorm Warning	MQT	Schoolcraft	57 min
Sep 12, 5:52 PM EDT	Severe Thunderstorm Warning	APX	Mackinac	37 min
Sep 12, 6:48 PM EDT	Severe Thunderstorm Warning	APX	Chippewa	30 min
Sep 21, 3:31 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Alpena	31 min
Sep 21, 5:25 PM EDT	Severe Thunderstorm Warning	GRR	Lake, Mason, Newaygo, Oceana	50 min
Sep 21, 5:35 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Oscoda	40 min
Sep 21, 5:53 PM EDT	Severe Thunderstorm Warning	GRR	Lake, Mason, Newaygo, Oceana, Osceola	67 min
Sep 21, 6:13 PM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella, Lake, Mecosta, Newaygo, Osceola	62 min
Sep 21, 6:35 PM EDT	Severe Thunderstorm Warning	GRR	Newaygo	25 min
Sep 21, 7:15 PM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella, Mecosta, Osceola	45 min
Sep 21, 7:32 PM EDT	Severe Thunderstorm Warning	GRR	Ionia, Isabella, Kent, Mecosta, Montcalm, Muskegon and 2 more	58 min
Sep 21, 7:48 PM EDT	Severe Thunderstorm Warning	APX	Crawford, Ogemaw, Oscoda	42 min
Sep 21, 7:52 PM EDT	Severe Thunderstorm Warning	DTX	Midland	38 min
Sep 21, 7:58 PM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella	10 min
Sep 21, 8:12 PM EDT	Severe Thunderstorm Warning	IWX	Berrien	44 min
Sep 21, 8:17 PM EDT	Severe Thunderstorm Warning	GRR	Kent, Muskegon, Newaygo, Oceana, Ottawa	58 min
Sep 21, 8:22 PM EDT	Severe Thunderstorm Warning	GRR	Gratiot, Isabella, Mecosta, Montcalm, Newaygo	53 min
Sep 21, 8:26 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Iosco	36 min
Sep 21, 8:33 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland	72 min
Sep 21, 8:33 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Kalamazoo, Kent, Muskegon, Ottawa and 1 more	57 min
Sep 21, 9:03 PM EDT	Severe Thunderstorm Warning	GRR	Barry, Calhoun, Clare, Clinton, Eaton, Ionia and 9 more	72 min
Sep 21, 9:17 PM EDT	Severe Thunderstorm Warning	DTX	Huron	43 min
Sep 21, 9:40 PM EDT	Severe Thunderstorm Warning	GRR	Barry, Calhoun, Clare, Clinton, Eaton, Gratiot and 9 more	65 min
Sep 21, 9:56 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland, Saginaw	79 min
Sep 21, 10:07 PM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	53 min
Sep 21, 10:28 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	77 min
Sep 21, 10:30 PM EDT	Severe Thunderstorm Warning	DTX	Genesee	60 min
Sep 21, 10:55 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Lapeer, Sanilac	80 min
Sep 21, 11:25 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair, Sanilac	52 min
Oct 24, 11:49 PM EDT	Severe Thunderstorm Warning	IWX	Berrien	26 min
Oct 24, 11:54 PM EDT	Severe Thunderstorm Warning	GRR	Van Buren	34 min
Oct 26, 12:11 PM EDT	Severe Thunderstorm Warning	GRR	Gratiot, Isabella, Montcalm	38 min
Oct 26, 12:29 PM EDT	Severe Thunderstorm Warning	DTX	Midland	35 min
Oct 26, 12:33 PM EDT	Severe Thunderstorm Warning	APX	Gladwin	42 min
Oct 26, 12:34 PM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella	20 min
Oct 26, 1:07 PM EDT	Severe Thunderstorm Warning	APX	Arenac, Gladwin, Iosco, Ogemaw	38 min

By county

Every county with at least one alert. A county page lists each alert that covered it.

42 more counties

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record 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.