Weather alerts in Iron County, Wisconsin, 2011

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

Iron County and its neighbors

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

Alerts: 150
Warnings: 32
Watches: 19
Advisories: 37
Busiest month: May28 alerts
Busiest day: May 30, 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.

Iron County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	20	9	55%	3	100%	11 min
Flash flood warnings	1	0	100%	0

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Duluth, MN: tornado warnings	12	6	50%	9	89%	20 min
NWS Duluth, MN: severe thunderstorm warnings	218	70	68%	209	82%	25 min
NWS Duluth, MN: flash flood warnings	16	4	75%	6	100%	53 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 4, 2:54 PM CST	Lake Effect Snow Watch	DLH	49 hr
Jan 5, 6:49 PM CST	Lake Effect Snow Advisory	DLH	21 hr
Jan 6, 1:39 PM CST	Wind Chill Advisory	DLH	19 hr
Jan 6, 3:24 PM CST	Lake Effect Snow Warning	DLH	42 hr
Jan 8, 9:50 AM CST	Lake Effect Snow Warning	DLH	13 hr
Jan 10, 3:37 PM CST	Lake Effect Snow Advisory	DLH	21 hr
Jan 11, 12:27 PM CST	Lake Effect Snow Warning	DLH	26 hr
Jan 14, 12:08 PM CST	Winter Weather Advisory	DLH	11 hr
Jan 15, 4:07 AM CST	Lake Effect Snow Advisory	DLH	11 hr
Jan 15, 9:05 AM CST	Lake Effect Snow Warning	DLH	11 hr
Jan 17, 6:21 PM CST	Lake Effect Snow Advisory	DLH	18 hr
Jan 20, 3:12 AM CST	Wind Chill Advisory	DLH	29 hr
Jan 20, 8:23 PM CST	Lake Effect Snow Advisory	DLH	7 hr
Jan 21, 12:15 PM CST	Wind Chill Advisory	DLH	24 hr
Jan 22, 4:17 AM CST	Lake Effect Snow Advisory	DLH	23 hr
Jan 22, 6:22 PM CST	Lake Effect Snow Warning	DLH	8 hr
Jan 27, 3:09 PM CST	Winter Weather Advisory	DLH	36 hr
Jan 28, 3:53 AM CST	Winter Storm Warning	DLH	35 hr
Jan 30, 9:27 AM CST	Lake Effect Snow Advisory	DLH	5 hr
Jan 31, 9:06 PM CST	Winter Weather Advisory	DLH	17 hr
Feb 6, 4:12 AM CST	Lake Effect Snow Advisory	DLH	19 hr
Feb 6, 11:27 PM CST	Lake Effect Snow Warning	DLH	25 hr
Feb 7, 2:26 PM CST	Wind Chill Advisory	DLH	20 hr
Feb 8, 3:08 PM CST	Wind Chill Advisory	DLH	19 hr
Feb 18, 1:02 AM CST	Wind Advisory	DLH	18 hr
Feb 18, 3:15 PM CST	Winter Storm Watch	DLH	24 hr
Feb 19, 3:01 PM CST	Winter Weather Advisory	DLH	51 hr
Mar 20, 4:03 PM CDT	Winter Storm Watch	DLH	24 hr
Mar 21, 3:33 PM CDT	Winter Storm Warning	DLH	51 hr
Mar 22, 3:49 PM CDT	Mesoscale Discussion	SPC	5 hr
Apr 2, 3:40 PM CDT	Winter Weather Advisory	DLH	24 hr
Apr 9, 11:34 PM CDT	Special Weather Statement	DLH	41 min
Apr 10, 12:36 AM CDT	Special Weather Statement	DLH	39 min
Apr 10, 3:19 PM CDT	Tornado Watch PDS	SPC	7 hr
Apr 10, 5:37 PM CDT	Severe Thunderstorm Warning	DLH	38 min
Apr 10, 6:13 PM CDT	Severe Thunderstorm Warning	DLH	19 min
Apr 10, 6:44 PM CDT	Severe Thunderstorm Warning	DLH	32 min
Apr 15, 3:56 AM CDT	Winter Weather Advisory	DLH	32 hr
Apr 18, 3:39 AM CDT	Winter Storm Watch	DLH	12 hr
Apr 18, 3:20 PM CDT	Winter Weather Advisory	DLH	28 hr
Apr 23, 1:40 AM CDT	Winter Weather Advisory	DLH	7 hr
Apr 26, 3:22 AM CDT	Winter Weather Advisory	DLH	28 hr
May 9, 12:33 PM CDT	Special Weather Statement	DLH	72 min
May 9, 1:38 PM CDT	Special Weather Statement	DLH	52 min
May 11, 1:11 AM CDT	Severe Thunderstorm Warning	DLH	49 min
May 11, 12:34 PM CDT	Special Weather Statement	DLH	16 min
May 11, 1:07 PM CDT	Special Weather Statement	DLH	18 min
May 11, 1:42 PM CDT	Special Weather Statement	DLH	23 min
May 11, 3:53 PM CDT	Special Weather Statement	DLH	22 min
May 22, 3:04 PM CDT	Severe Thunderstorm Warning	DLH	56 min
May 22, 3:14 PM CDT	Severe Thunderstorm Warning	DLH	46 min
May 22, 3:43 PM CDT	Tornado Watch	SPC	5 hr
May 22, 3:57 PM CDT	Severe Thunderstorm Warning	DLH	48 min
May 22, 5:10 PM CDT	Severe Thunderstorm Warning	DLH	50 min
May 22, 7:06 PM CDT	Special Weather Statement	DLH	24 min
May 25, 1:36 PM CDT	Frost Advisory	DLH	18 hr
May 26, 3:47 AM CDT	Freeze Watch	DLH	10 hr
May 26, 2:03 PM CDT	Freeze Warning	DLH	17 hr
May 28, 2:11 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 28, 5:22 PM CDT	Mesoscale Discussion	SPC	53 min
May 28, 9:27 PM CDT	Special Weather Statement	DLH	33 min
May 30, 5:47 AM CDT	Special Weather Statement	DLH	13 min
May 30, 6:56 AM CDT	Special Weather Statement	DLH	34 min
May 30, 7:48 AM CDT	Special Weather Statement	DLH	27 min
May 30, 10:32 AM CDT	Severe Thunderstorm Warning	DLH	28 min
May 30, 11:08 AM CDT	Special Weather Statement	DLH	22 min
May 30, 1:53 PM CDT	Severe Thunderstorm Warning	DLH	37 min
May 30, 2:10 PM CDT	Mesoscale Discussion	SPC	95 min
May 30, 2:23 PM CDT	Areal Flood Advisory	DLH	6 hr
May 31, 12:00 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 1, 3:11 AM CDT	Wind Advisory	DLH	12 hr
Jun 3, 5:10 PM CDT	Tornado Watch	SPC	7 hr
Jun 3, 10:25 PM CDT	Special Weather Statement	DLH	20 min
Jun 6, 4:20 PM CDT	Special Weather Statement	DLH	25 min
Jun 6, 4:53 PM CDT	Special Weather Statement	DLH	37 min
Jun 6, 5:26 PM CDT	Severe Thunderstorm Warning	DLH	25 min
Jun 7, 1:32 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 16, 8:42 PM CDT	Dense Fog Advisory	DLH	12 hr
Jun 18, 3:20 PM CDT	Flash Flood Watch	DLH	18 hr
Jun 27, 3:44 PM CDT	Mesoscale Discussion	SPC	91 min
Jun 30, 3:57 AM CDT	Heat Advisory	DLH	41 hr
Jul 1, 2:08 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 1, 7:47 PM CDT	Severe Thunderstorm Warning	DLH	58 min
Jul 1, 8:40 PM CDT	Severe Thunderstorm Warning	DLH	65 min
Jul 1, 10:04 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 1, 11:38 PM CDT	Mesoscale Discussion	SPC	97 min
Jul 5, 12:36 AM CDT	Special Weather Statement	DLH	54 min
Jul 5, 1:22 AM CDT	Special Weather Statement	DLH	53 min
Jul 5, 2:47 PM CDT	Special Weather Statement	DLH	43 min
Jul 5, 4:31 PM CDT	Special Weather Statement	DLH	59 min
Jul 5, 5:49 PM CDT	Special Weather Statement	DLH	41 min
Jul 15, 3:32 AM CDT	Excessive Heat Watch	DLH	34 hr
Jul 15, 3:42 PM CDT	Excessive Heat Warning	DLH	5 days
Jul 16, 3:46 AM CDT	Heat Advisory	DLH	5 days
Jul 17, 1:06 PM CDT	Flash Flood Watch	DLH	14 hr
Jul 17, 5:38 PM CDT	Special Weather Statement	DLH	22 min
Jul 17, 6:09 PM CDT	Special Weather Statement	DLH	36 min
Jul 17, 6:11 PM CDT	Mesoscale Discussion	SPC	64 min
Jul 17, 6:14 PM CDT	Severe Thunderstorm Warning	DLH	46 min
Jul 17, 6:30 PM CDT	Severe Thunderstorm Warning	DLH	30 min
Jul 17, 6:52 PM CDT	Flash Flood Warning	DLH	3 hr
Jul 17, 7:00 PM CDT	Severe Thunderstorm Warning	DLH	30 min
Jul 17, 7:06 PM CDT	Severe Thunderstorm Warning	DLH	24 min
Jul 18, 1:41 PM CDT	Special Weather Statement	DLH	34 min
Jul 23, 9:54 AM CDT	Special Weather Statement	DLH	81 min
Jul 23, 10:47 AM CDT	Special Weather Statement	DLH	43 min
Jul 30, 11:28 AM CDT	Special Weather Statement	DLH	62 min
Jul 30, 11:28 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 30, 12:23 PM CDT	Special Weather Statement	DLH	37 min
Aug 1, 3:25 PM CDT	Flash Flood Watch	DLH	21 hr
Aug 2, 2:20 AM CDT	Severe Thunderstorm Watch	SPC	10 hr
Aug 2, 3:23 AM CDT	Severe Thunderstorm Warning	DLH	37 min
Aug 2, 3:56 AM CDT	Severe Thunderstorm Warning	DLH	49 min
Aug 2, 5:23 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 2, 9:32 AM CDT	Special Weather Statement	DLH	58 min
Aug 2, 9:34 AM CDT	Special Weather Statement	DLH	56 min
Aug 2, 11:51 AM CDT	Mesoscale Discussion	SPC	24 min
Aug 6, 3:13 PM CDT	Special Weather Statement	DLH	62 min
Aug 8, 8:50 PM CDT	Special Weather Statement	DLH	55 min
Aug 8, 9:54 PM CDT	Special Weather Statement	DLH	21 min
Aug 9, 1:10 AM CDT	Special Weather Statement	DLH	35 min
Aug 16, 8:16 PM CDT	Special Weather Statement	DLH	59 min
Aug 19, 6:59 AM CDT	Special Weather Statement	DLH	31 min
Aug 23, 1:32 PM CDT	Special Weather Statement	DLH	28 min
Aug 26, 7:58 AM CDT	Special Weather Statement	DLH	17 min
Aug 26, 8:20 AM CDT	Special Weather Statement	DLH	25 min
Sep 3, 4:19 PM CDT	Special Weather Statement	DLH	26 min
Sep 3, 4:47 PM CDT	Special Weather Statement	DLH	28 min
Sep 12, 1:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 12, 5:31 PM CDT	Mesoscale Discussion	SPC	119 min
Sep 12, 6:15 PM CDT	Special Weather Statement	DLH	60 min
Sep 12, 6:50 PM CDT	Special Weather Statement	DLH	25 min
Sep 12, 7:09 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Sep 13, 7:12 PM CDT	Special Weather Statement	DLH	48 min
Sep 14, 4:20 AM CDT	Frost Advisory	DLH	28 hr
Sep 14, 6:38 PM CDT	Special Weather Statement	DLH	52 min
Sep 15, 3:55 PM CDT	Freeze Warning	DLH	16 hr
Sep 20, 3:45 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 20, 7:45 PM CDT	Special Weather Statement	DLH	30 min
Sep 28, 5:23 PM CDT	Wind Advisory	DLH	25 hr
Oct 6, 2:21 PM CDT	Wind Advisory	DLH	38 hr
Nov 7, 3:06 PM CST	Winter Storm Watch	DLH	51 hr
Nov 10, 3:44 AM CST	Lake Effect Snow Advisory	DLH	11 hr
Nov 18, 3:48 AM CST	Winter Storm Watch	DLH	12 hr
Nov 18, 3:31 PM CST	Winter Storm Warning	DLH	36 hr
Nov 19, 1:05 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 3, 3:49 AM CST	Winter Weather Advisory	DLH	31 hr
Dec 5, 11:31 AM CST	Lake Effect Snow Advisory	DLH	6 hr
Dec 11, 3:32 PM CST	Freezing Rain Advisory	DLH	53 hr
Dec 15, 10:26 AM CST	Lake Effect Snow Advisory	DLH	11 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	19
Severe Thunderstorm Watch	5
Tornado Watch	3
Mesoscale Discussion	15
Special Weather Statement	47
Flooding
Flash Flood Warning	1
Flash Flood Watch	3
Areal Flood Advisory	1
Winter
Lake Effect Snow Warning	6
Winter Storm Warning	3
Lake Effect Snow Watch	1
Winter Storm Watch	5
Freezing Rain Advisory	1
Lake Effect Snow Advisory	11
Winter Weather Advisory	10
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	2
Cold
Freeze Warning	2
Freeze Watch	1
Frost Advisory	2
Wind Chill Advisory	5
Wind and dust
Wind Advisory	4
Fog and smoke
Dense 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 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.