Weather alerts in Cass County, Michigan, 2010

162 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Cass County and its neighbors

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

Alerts: 162
Warnings: 41
Watches: 35
Advisories: 39
Busiest month: June39 alerts
Busiest day: June 23, 201010 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 4 tornado warnings covering Cass County in 2010 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 22 minutes after it went out.

Cass County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	1	75%	1	100%	22 min
Severe thunderstorm warnings	21	17	19%	12	83%	30 min
Flash flood warnings	1	0	100%	0

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Northern Indiana: tornado warnings	51	13	75%	39	69%	20 min
NWS Northern Indiana: severe thunderstorm warnings	163	98	40%	407	68%	29 min
NWS Northern Indiana: flash flood warnings	21	8	62%	30	53%	112 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, 3:18 AM EST	Lake Effect Snow Advisory	IWX	34 hr
Jan 4, 1:36 PM EST	Lake Effect Snow Warning	IWX	22 hr
Jan 5, 3:02 PM EST	Winter Storm Watch	IWX	24 hr
Jan 6, 3:04 PM EST	Winter Weather Advisory	IWX	43 hr
Jan 17, 1:56 AM EST	Freezing Fog Advisory	IWX	8 hr
Jan 17, 3:50 PM EST	Freezing Fog Advisory	IWX	18 hr
Jan 18, 3:52 PM EST	Freezing Fog Advisory	IWX	15 hr
Feb 7, 4:19 PM EST	Winter Storm Watch	IWX	19 hr
Feb 8, 11:25 AM EST	Winter Storm Warning	IWX	56 hr
Feb 10, 7:14 PM EST	Freezing Rain Advisory	IWX	8 hr
Feb 16, 11:37 AM EST	Lake Effect Snow Advisory	IWX	17 hr
Feb 17, 5:36 AM EST	Winter Weather Advisory	IWX	5 hr
Feb 20, 2:54 PM EST	Winter Storm Watch	IWX	26 hr
Feb 21, 4:50 PM EST	Winter Storm Warning	IWX	18 hr
Feb 26, 2:51 PM EST	Winter Weather Advisory	IWX	13 hr
Mar 8, 6:28 PM EST	Dense Fog Advisory	IWX	10 hr
Apr 1, 11:05 AM EDT	Fire Weather Watch	IWX	24 hr
Apr 2, 10:51 AM EDT	Red Flag Warning	IWX	9 hr
Apr 5, 10:37 PM EDT	Mesoscale Discussion	SPC	53 min
Apr 5, 11:38 PM EDT	Severe Thunderstorm Warning	IWX	37 min
Apr 6, 12:07 AM EDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 6, 8:37 AM EDT	Mesoscale Discussion	SPC	83 min
Apr 6, 9:26 AM EDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 6, 9:56 AM EDT	Severe Thunderstorm Warning	IWX	49 min
Apr 6, 11:27 AM EDT	Mesoscale Discussion	SPC	63 min
Apr 8, 3:40 PM EDT	Freeze Warning	IWX	17 hr
Apr 9, 4:30 AM EDT	Freeze Watch	IWX	9 hr
Apr 9, 1:44 PM EDT	Freeze Warning	IWX	19 hr
Apr 16, 3:32 PM EDT	Freeze Watch	IWX	12 hr
Apr 17, 3:05 AM EDT	Freeze Warning	IWX	30 hr
Apr 18, 3:56 PM EDT	Frost Advisory	IWX	16 hr
Apr 19, 3:49 PM EDT	Frost Advisory	IWX	14 hr
Apr 21, 3:29 PM EDT	Frost Advisory	IWX	17 hr
Apr 27, 3:38 AM EDT	Freeze Watch	IWX	8 hr
Apr 27, 11:49 AM EDT	Freeze Warning	IWX	20 hr
Apr 28, 3:11 PM EDT	Frost Advisory	IWX	17 hr
May 7, 9:16 AM EDT	Special Weather Statement	IWX	29 min
May 7, 3:30 PM EDT	Tornado Watch	SPC	9 hr
May 7, 4:42 PM EDT	Special Weather Statement	IWX	33 min
May 8, 6:12 AM EDT	Frost Advisory	IWX	26 hr
May 9, 4:20 AM EDT	Frost Advisory	IWX	28 hr
May 9, 4:20 AM EDT	Freeze Warning	IWX	28 hr
May 12, 4:32 PM EDT	Flood Watch	IWX	23 hr
May 13, 4:04 AM EDT	Special Weather Statement	IWX	56 min
May 13, 4:54 AM EDT	Areal Flood Advisory	IWX	3 hr
May 21, 3:24 PM EDT	Severe Thunderstorm Warning	IWX	51 min
May 31, 1:05 PM EDT	Severe Thunderstorm Warning	IWX	40 min
May 31, 1:43 PM EDT	Special Weather Statement	IWX	32 min
May 31, 2:17 PM EDT	Special Weather Statement	IWX	58 min
May 31, 2:22 PM EDT	Severe Thunderstorm Warning	IWX	38 min
May 31, 2:56 PM EDT	Severe Thunderstorm Warning	IWX	30 min
Jun 1, 1:31 AM EDT	Dense Fog Advisory	IWX	7 hr
Jun 2, 5:33 AM EDT	Mesoscale Discussion	SPC	87 min
Jun 4, 5:54 PM EDT	Mesoscale Discussion	SPC	66 min
Jun 4, 6:29 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 5, 4:16 AM EDT	Flood Watch	IWX	25 hr
Jun 5, 10:11 PM EDT	Tornado Watch	SPC	7 hr
Jun 5, 11:16 PM EDT	Severe Thunderstorm Warning	IWX	59 min
Jun 5, 11:33 PM EDT	Tornado Warning	IWX	27 min
Jun 5, 11:55 PM EDT	Severe Thunderstorm Warning	IWX	65 min
Jun 6, 12:00 AM EDT	Tornado Warning	IWX	30 min
Jun 6, 12:17 AM EDT	Mesoscale Discussion	SPC	118 min
Jun 18, 3:47 PM EDT	Mesoscale Discussion	SPC	58 min
Jun 18, 4:32 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 18, 5:51 PM EDT	Severe Thunderstorm Warning	IWX	54 min
Jun 18, 6:06 PM EDT	Mesoscale Discussion	SPC	54 min
Jun 18, 6:41 PM EDT	Severe Thunderstorm Warning	IWX	64 min
Jun 18, 7:50 PM EDT	High Wind Warning	IWX	87 min
Jun 18, 8:08 PM EDT	Areal Flood Advisory	IWX	52 min
Jun 18, 8:50 PM EDT	Flash Flood Watch	IWX	6 hr
Jun 18, 11:21 PM EDT	Mesoscale Discussion	SPC	54 min
Jun 21, 10:51 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 21, 11:44 PM EDT	Mesoscale Discussion	SPC	61 min
Jun 23, 7:40 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 23, 8:24 AM EDT	Special Weather Statement	IWX	36 min
Jun 23, 9:01 AM EDT	Flash Flood Watch	IWX	18 hr
Jun 23, 9:26 AM EDT	Special Weather Statement	IWX	34 min
Jun 23, 9:31 AM EDT	Mesoscale Discussion	SPC	59 min
Jun 23, 11:25 AM EDT	Special Weather Statement	IWX	35 min
Jun 23, 11:52 AM EDT	Mesoscale Discussion	SPC	53 min
Jun 23, 6:56 PM EDT	Mesoscale Discussion	SPC	94 min
Jun 23, 7:16 PM EDT	Tornado Watch	SPC	5 hr
Jun 23, 7:48 PM EDT	Severe Thunderstorm Warning	IWX	57 min
Jun 23, 8:28 PM EDT	Severe Thunderstorm Warning	IWX	62 min
Jun 23, 8:45 PM EDT	Areal Flood Advisory	IWX	90 min
Jun 23, 9:19 PM EDT	Tornado Warning	IWX	41 min
Jun 27, 11:02 AM EDT	Mesoscale Discussion	SPC	118 min
Jun 27, 11:38 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 27, 12:10 PM EDT	Severe Thunderstorm Warning	IWX	65 min
Jun 27, 2:43 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 7, 4:09 AM EDT	Heat Advisory	IWX	17 hr
Jul 15, 4:52 AM EDT	Mesoscale Discussion	SPC	83 min
Jul 15, 12:57 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 15, 1:01 PM EDT	Mesoscale Discussion	SPC	59 min
Jul 15, 5:31 PM EDT	Special Weather Statement	IWX	44 min
Jul 15, 5:42 PM EDT	Severe Thunderstorm Warning	IWX	51 min
Jul 15, 6:39 PM EDT	Areal Flood Advisory	IWX	3 hr
Jul 18, 12:52 PM EDT	Mesoscale Discussion	SPC	113 min
Jul 18, 1:47 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 18, 3:23 PM EDT	Severe Thunderstorm Warning	IWX	46 min
Jul 22, 2:53 PM EDT	Heat Advisory	IWX	28 hr
Jul 22, 7:33 PM EDT	Tornado Watch	SPC	5 hr
Jul 23, 12:00 AM EDT	Mesoscale Discussion	SPC	90 min
Jul 23, 12:35 AM EDT	Tornado Watch	SPC	3 hr
Jul 23, 4:58 PM EDT	Mesoscale Discussion	SPC	92 min
Jul 23, 5:23 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 23, 7:10 PM EDT	Flash Flood Watch	IWX	19 hr
Jul 23, 7:47 PM EDT	Mesoscale Discussion	SPC	118 min
Jul 23, 8:01 PM EDT	Severe Thunderstorm Warning	IWX	59 min
Jul 23, 8:23 PM EDT	Areal Flood Advisory	IWX	112 min
Jul 23, 8:32 PM EDT	Severe Thunderstorm Warning	IWX	58 min
Jul 23, 9:16 PM EDT	Severe Thunderstorm Warning	IWX	21 min
Jul 24, 2:58 AM EDT	Areal Flood Advisory	IWX	4 hr
Jul 24, 6:50 AM EDT	Areal Flood Advisory	IWX	3 hr
Jul 24, 8:08 AM EDT	Flash Flood Warning	IWX	3 hr
Jul 24, 8:21 AM EDT	Severe Thunderstorm Warning	IWX	54 min
Jul 24, 2:53 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 24, 4:37 PM EDT	Mesoscale Discussion	SPC	83 min
Jul 28, 12:44 PM EDT	Mesoscale Discussion	SPC	91 min
Jul 28, 1:20 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 28, 1:59 PM EDT	Special Weather Statement	IWX	46 min
Jul 28, 2:35 PM EDT	Areal Flood Advisory	IWX	55 min
Jul 28, 2:52 PM EDT	Severe Thunderstorm Warning	IWX	53 min
Aug 4, 7:45 AM EDT	Mesoscale Discussion	SPC	60 min
Aug 4, 8:48 AM EDT	Severe Thunderstorm Warning	IWX	57 min
Aug 4, 9:42 AM EDT	Special Weather Statement	IWX	33 min
Aug 9, 6:58 AM EDT	Special Weather Statement	IWX	62 min
Aug 10, 3:15 AM EDT	Dense Fog Advisory	IWX	6 hr
Sep 2, 10:57 PM EDT	Special Weather Statement	IWX	33 min
Sep 3, 12:14 AM EDT	Special Weather Statement	IWX	31 min
Sep 11, 10:45 PM EDT	Dense Fog Advisory	IWX	5 hr
Sep 21, 7:05 PM EDT	Mesoscale Discussion	SPC	55 min
Sep 21, 8:50 PM EDT	Special Weather Statement	IWX	55 min
Sep 21, 9:52 PM EDT	Special Weather Statement	IWX	58 min
Oct 3, 3:31 PM EDT	Frost Advisory	IWX	16 hr
Oct 4, 3:24 PM EDT	Frost Advisory	IWX	17 hr
Oct 15, 3:53 PM EDT	Frost Advisory	IWX	16 hr
Oct 18, 3:07 PM EDT	Frost Advisory	IWX	18 hr
Oct 20, 10:04 AM EDT	Red Flag Warning	IWX	10 hr
Oct 21, 3:39 PM EDT	Frost Advisory	IWX	17 hr
Oct 25, 1:46 AM EDT	Special Weather Statement	IWX	29 min
Oct 25, 4:18 AM EDT	High Wind Watch	IWX	12 hr
Oct 25, 4:12 PM EDT	High Wind Warning	IWX	28 hr
Oct 26, 4:11 AM EDT	High Wind Watch	IWX	12 hr
Oct 26, 4:28 AM EDT	Tornado Watch	SPC	8 hr
Oct 26, 7:00 AM EDT	Mesoscale Discussion	SPC	2 hr
Oct 26, 10:00 AM EDT	Tornado Warning	IWX	35 min
Oct 26, 4:38 PM EDT	High Wind Warning	IWX	22 hr
Oct 27, 2:44 PM EDT	Wind Advisory	IWX	6 hr
Nov 22, 10:18 AM EST	Special Weather Statement	IWX	57 min
Nov 22, 11:16 AM EST	Special Weather Statement	IWX	29 min
Nov 22, 4:49 PM EST	Mesoscale Discussion	SPC	86 min
Nov 22, 6:13 PM EST	Tornado Watch	SPC	4 hr
Nov 24, 12:35 PM EST	Mesoscale Discussion	SPC	5 hr
Nov 25, 10:18 AM EST	Dense Fog Advisory	IWX	4 hr
Dec 1, 1:12 PM EST	Lake Effect Snow Advisory	IWX	9 hr
Dec 3, 4:19 AM EST	Lake Effect Snow Watch	IWX	25 hr
Dec 4, 4:49 AM EST	Lake Effect Snow Warning	IWX	4 days
Dec 10, 3:31 PM EST	Winter Storm Watch	IWX	25 hr
Dec 11, 4:11 PM EST	Winter Storm Warning	IWX	60 hr
Dec 11, 4:11 PM EST	Winter Weather Advisory	IWX	57 hr
Dec 22, 7:26 AM EST	Winter Weather Advisory	IWX	4 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
Tornado Warning	4
Severe Thunderstorm Watch	12
Tornado Watch	7
Mesoscale Discussion	28
Special Weather Statement	19
Flooding
Flash Flood Warning	1
Flash Flood Watch	3
Flood Watch	2
Areal Flood Advisory	8
Winter
Lake Effect Snow Warning	2
Winter Storm Warning	3
Lake Effect Snow Watch	1
Winter Storm Watch	4
Freezing Rain Advisory	1
Lake Effect Snow Advisory	3
Winter Weather Advisory	5
Heat
Heat Advisory	2
Cold
Freeze Warning	5
Freeze Watch	3
Frost Advisory	11
Wind and dust
High Wind Warning	3
High Wind Watch	2
Wind Advisory	1
Fire
Red Flag Warning	2
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	5
Freezing Fog Advisory	3

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast 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.