Alert archive / Wisconsin / Walworth County

Weather alerts in Walworth County, Wisconsin, 2008

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

Walworth County and its neighbors

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

Alerts: 184
Warnings: 48
Watches: 40
Advisories: 51
Busiest month: June62 alerts
Busiest day: June 12, 200812 alerts

Over time

By month

Warning verification

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

2 of 4 tornado warnings covering Walworth County in 2008 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 49 minutes after it went out.

Walworth County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	2	50%	1	100%	49 min
Severe thunderstorm warnings	23	14	39%	17	76%	30 min
Flash flood warnings	6	4	33%	2	100%	93 min

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Milwaukee, WI: tornado warnings	43	19	56%	40	75%	30 min
NWS Milwaukee, WI: severe thunderstorm warnings	149	76	49%	253	72%	28 min
NWS Milwaukee, WI: flash flood warnings	52	27	48%	84	90%	118 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 5, 9:25 PM CST	Dense Fog Advisory	MKX	35 hr
Jan 7, 7:26 AM CST	Mesoscale Discussion	SPC	2 hr
Jan 7, 1:47 PM CST	Mesoscale Discussion	SPC	58 min
Jan 7, 2:52 PM CST	Dense Fog Advisory	MKX	18 hr
Jan 7, 3:21 PM CST	Tornado Warning	MKX	54 min
Jan 7, 4:03 PM CST	Severe Thunderstorm Warning	MKX	42 min
Jan 10, 2:09 PM CST	Snow Advisory	MKX	13 hr
Jan 17, 2:15 PM CST	Wind Chill Advisory	MKX	70 hr
Jan 20, 2:00 PM CST	Snow Advisory	MKX	38 hr
Jan 24, 4:13 AM CST	Wind Chill Advisory	MKX	5 hr
Jan 28, 10:22 AM CST	High Wind Watch	MKX	17 hr
Jan 28, 11:08 AM CST	Winter Storm Watch	MKX	17 hr
Jan 28, 11:32 AM CST	Wind Chill Advisory	MKX	39 hr
Jan 29, 3:41 AM CST	Winter Storm Warning	MKX	20 hr
Jan 29, 12:19 PM CST	Mesoscale Discussion	SPC	4 hr
Jan 29, 8:54 PM CST	Blowing Snow Advisory	MKX	7 hr
Jan 30, 2:08 AM CST	Wind Chill Warning	MKX	8 hr
Jan 31, 3:32 AM CST	Snow Advisory	MKX	29 hr
Feb 3, 5:03 PM CST	Snow Advisory	MKX	6 hr
Feb 4, 4:17 AM CST	Winter Storm Watch	MKX	12 hr
Feb 4, 3:04 PM CST	Winter Storm Warning	MKX	54 hr
Feb 4, 5:15 PM CST	Dense Fog Advisory	MKX	10 hr
Feb 6, 6:07 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 6, 11:32 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 8, 2:48 PM CST	Blowing Snow Advisory	MKX	13 hr
Feb 8, 2:48 PM CST	Wind Chill Watch	MKX	13 hr
Feb 9, 3:48 AM CST	Wind Advisory	MKX	3 hr
Feb 9, 4:02 AM CST	Wind Chill Warning	MKX	32 hr
Feb 9, 7:18 AM CST	Winter Weather Advisory	MKX	13 hr
Feb 9, 7:50 PM CST	Blowing Snow Advisory	MKX	22 hr
Feb 10, 11:57 AM CST	Wind Chill Advisory	MKX	12 hr
Feb 10, 3:30 PM CST	Snow Advisory	MKX	53 hr
Feb 15, 4:29 AM CST	Winter Storm Watch	MKX	32 hr
Feb 16, 12:26 PM CST	Winter Weather Advisory	MKX	31 hr
Feb 16, 1:14 PM CST	Flood Watch	MKX	29 hr
Feb 16, 11:34 PM CST	Mesoscale Discussion	SPC	5 hr
Feb 19, 3:04 PM CST	Wind Chill Advisory	MKX	19 hr
Feb 24, 1:54 AM CST	Winter Storm Watch	MKX	26 hr
Feb 25, 3:57 AM CST	Winter Storm Warning	MKX	16 hr
Mar 2, 3:24 PM CST	Winter Weather Advisory	MKX	17 hr
Mar 18, 9:17 AM CDT	Dense Fog Advisory	MKX	2 hr
Mar 19, 2:59 PM CDT	Winter Storm Watch	MKX	23 hr
Mar 20, 1:51 PM CDT	Winter Storm Warning	MKX	37 hr
Mar 21, 4:37 AM CDT	Mesoscale Discussion	SPC	4 hr
Mar 25, 2:23 PM CDT	Winter Storm Watch	MKX	59 hr
Mar 30, 2:50 AM CDT	Flood Watch	MKX	41 hr
Apr 11, 7:05 AM CDT	Dense Fog Advisory	MKX	3 hr
Apr 16, 7:14 AM CDT	Wind Advisory	MKX	8 hr
Apr 25, 9:10 AM CDT	Mesoscale Discussion	SPC	65 min
Apr 25, 10:00 AM CDT	Severe Thunderstorm Warning	MKX	30 min
Apr 25, 2:10 PM CDT	Mesoscale Discussion	SPC	65 min
Apr 25, 2:41 PM CDT	Tornado Watch	SPC	5 hr
Apr 25, 4:37 PM CDT	Severe Thunderstorm Warning	MKX	53 min
Apr 25, 6:34 PM CDT	Areal Flood Advisory	MKX	3 hr
Apr 26, 2:12 PM CDT	Wind Advisory	MKX	5 hr
May 2, 4:31 PM CDT	Tornado Watch	SPC	3 hr
May 9, 3:17 PM CDT	Frost Advisory	MKX	13 hr
May 25, 9:23 PM CDT	Mesoscale Discussion	SPC	67 min
May 27, 2:55 PM CDT	Frost Advisory	MKX	16 hr
May 30, 4:29 PM CDT	Mesoscale Discussion	SPC	61 min
Jun 5, 1:38 AM CDT	Mesoscale Discussion	SPC	3 hr
Jun 5, 4:59 AM CDT	Tornado Watch	SPC	6 hr
Jun 5, 6:11 AM CDT	Severe Thunderstorm Warning	MKX	64 min
Jun 5, 6:25 AM CDT	Severe Thunderstorm Warning	MKX	50 min
Jun 5, 6:46 AM CDT	Mesoscale Discussion	SPC	119 min
Jun 5, 7:42 AM CDT	Areal Flood Advisory	MKX	4 hr
Jun 5, 8:09 AM CDT	Severe Thunderstorm Warning	MKX	42 min
Jun 6, 5:14 AM CDT	Mesoscale Discussion	SPC	61 min
Jun 6, 1:05 PM CDT	Tornado Watch	SPC	5 hr
Jun 6, 1:39 PM CDT	Severe Thunderstorm Warning	MKX	66 min
Jun 6, 2:03 PM CDT	Severe Thunderstorm Warning	MKX	27 min
Jun 6, 2:12 PM CDT	Wind Advisory	MKX	4 hr
Jun 6, 2:21 PM CDT	Tornado Warning	MKX	54 min
Jun 7, 12:17 PM CDT	Tornado Watch	SPC	8 hr
Jun 7, 12:46 PM CDT	Flash Flood Watch	MKX	39 hr
Jun 7, 1:35 PM CDT	Mesoscale Discussion	SPC	85 min
Jun 7, 4:05 PM CDT	Tornado Warning	MKX	55 min
Jun 7, 4:58 PM CDT	Severe Thunderstorm Warning	MKX	47 min
Jun 7, 5:27 PM CDT	Flash Flood Warning	MKX	3 hr
Jun 7, 6:34 PM CDT	Mesoscale Discussion	SPC	56 min
Jun 7, 7:40 PM CDT	Tornado Watch	SPC	7 hr
Jun 8, 8:43 AM CDT	Mesoscale Discussion	SPC	62 min
Jun 8, 9:42 AM CDT	Severe Thunderstorm Warning	MKX	48 min
Jun 8, 9:47 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 8, 9:50 AM CDT	Flash Flood Warning	MKX	5 hr
Jun 8, 10:03 AM CDT	Severe Thunderstorm Warning	MKX	57 min
Jun 8, 2:28 PM CDT	Areal Flood Warning	MKX	18 hr
Jun 8, 7:52 PM CDT	Mesoscale Discussion	SPC	53 min
Jun 8, 8:03 PM CDT	Tornado Watch	SPC	5 hr
Jun 8, 8:38 PM CDT	Severe Thunderstorm Warning	MKX	76 min
Jun 8, 8:42 PM CDT	Flash Flood Warning	MKX	2 hr
Jun 8, 8:55 PM CDT	Tornado Warning	MKX	35 min
Jun 11, 3:36 AM CDT	Flash Flood Watch	MKX	51 hr
Jun 12, 12:37 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 12, 1:04 PM CDT	Tornado Watch	SPC	7 hr
Jun 12, 1:08 PM CDT	Severe Thunderstorm Warning	MKX	67 min
Jun 12, 1:10 PM CDT	Areal Flood Advisory	MKX	3 hr
Jun 12, 1:52 PM CDT	Flash Flood Warning	MKX	54 min
Jun 12, 1:55 PM CDT	Severe Thunderstorm Warning	MKX	35 min
Jun 12, 2:55 PM CDT	Severe Thunderstorm Warning	MKX	50 min
Jun 12, 3:45 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 12, 3:46 PM CDT	Flash Flood Warning	MKX	4 hr
Jun 12, 3:52 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 12, 4:28 PM CDT	Severe Thunderstorm Warning	MKX	37 min
Jun 12, 6:49 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 12, 7:31 PM CDT	Flash Flood Warning	MKX	6 hr
Jun 12, 7:48 PM CDT	Tornado Watch	SPC	6 hr
Jun 12, 11:15 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 13, 12:03 AM CDT	Severe Thunderstorm Warning	MKX	42 min
Jun 13, 12:39 AM CDT	Severe Thunderstorm Warning	MKX	36 min
Jun 13, 1:08 AM CDT	Severe Thunderstorm Warning	MKX	52 min
Jun 13, 1:24 AM CDT	Areal Flood Warning	MKX	60 hr
Jun 14, 3:14 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 14, 5:17 PM CDT	Mesoscale Discussion	SPC	88 min
Jun 15, 1:07 PM CDT	Areal Flood Warning	MKX	24 hr
Jun 15, 1:08 PM CDT	Mesoscale Discussion	SPC	97 min
Jun 20, 1:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 27, 8:56 PM CDT	Mesoscale Discussion	SPC	94 min
Jun 28, 10:44 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 12:48 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 28, 2:44 PM CDT	Severe Thunderstorm Warning	MKX	46 min
Jun 28, 3:23 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 9:42 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 10:09 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 2, 1:55 PM CDT	Mesoscale Discussion	SPC	95 min
Jul 2, 3:08 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 2, 7:03 PM CDT	Mesoscale Discussion	SPC	57 min
Jul 7, 2:46 PM CDT	Flash Flood Watch	MKX	13 hr
Jul 7, 3:56 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 7, 5:36 PM CDT	Mesoscale Discussion	SPC	114 min
Jul 7, 8:32 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 7, 9:18 PM CDT	Areal Flood Advisory	MKX	3 hr
Jul 7, 10:52 PM CDT	Severe Thunderstorm Warning	MKX	67 min
Jul 10, 12:55 PM CDT	Mesoscale Discussion	SPC	95 min
Jul 10, 1:18 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 10, 5:39 PM CDT	Severe Thunderstorm Warning	MKX	66 min
Jul 10, 5:52 PM CDT	Mesoscale Discussion	SPC	83 min
Jul 10, 6:14 PM CDT	Severe Thunderstorm Warning	MKX	76 min
Jul 11, 10:03 AM CDT	Areal Flood Advisory	MKX	3 hr
Jul 12, 1:52 AM CDT	Mesoscale Discussion	SPC	53 min
Jul 12, 6:21 AM CDT	Areal Flood Warning	MKX	6 hr
Jul 16, 9:57 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 16, 3:39 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 17, 11:25 AM CDT	Flash Flood Watch	MKX	21 hr
Jul 19, 6:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 19, 9:35 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jul 31, 11:59 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 31, 1:51 PM CDT	Mesoscale Discussion	SPC	84 min
Aug 4, 3:51 PM CDT	Mesoscale Discussion	SPC	84 min
Aug 4, 4:48 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 14, 3:13 AM CDT	Dense Fog Advisory	MKX	6 hr
Sep 12, 2:43 PM CDT	Flood Watch	MKX	24 hr
Sep 21, 6:22 PM CDT	Dense Fog Advisory	MKX	15 hr
Oct 3, 3:27 AM CDT	Frost Advisory	MKX	28 hr
Oct 12, 2:14 AM CDT	Dense Fog Advisory	MKX	6 hr
Oct 25, 2:01 PM CDT	Wind Advisory	MKX	30 hr
Nov 12, 4:50 PM CST	Dense Fog Advisory	MKX	6 hr
Nov 29, 2:42 PM CST	Winter Weather Advisory	MKX	13 hr
Nov 29, 9:38 PM CST	Winter Storm Warning	MKX	30 hr
Nov 30, 3:36 AM CST	Winter Weather Advisory	MKX	32 hr
Nov 30, 5:34 PM CST	Mesoscale Discussion	SPC	6 hr
Dec 2, 3:34 PM CST	Winter Weather Advisory	MKX	28 hr
Dec 7, 4:06 AM CST	Winter Storm Watch	MKX	31 hr
Dec 8, 4:25 AM CST	Winter Storm Warning	MKX	38 hr
Dec 8, 7:12 PM CST	Mesoscale Discussion	SPC	2 hr
Dec 15, 2:08 PM CST	Winter Weather Advisory	MKX	34 hr
Dec 16, 1:52 PM CST	Winter Storm Watch	MKX	24 hr
Dec 17, 1:53 PM CST	Winter Storm Warning	MKX	48 hr
Dec 18, 11:38 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 19, 6:22 AM CST	Mesoscale Discussion	SPC	5 hr
Dec 19, 2:11 PM CST	Winter Storm Watch	MKX	14 hr
Dec 19, 3:00 PM CST	Wind Chill Advisory	MKX	69 hr
Dec 20, 4:29 AM CST	Winter Weather Advisory	MKX	20 hr
Dec 20, 3:26 PM CST	Winter Storm Warning	MKX	27 hr
Dec 21, 3:42 PM CST	Winter Weather Advisory	MKX	8 hr
Dec 22, 4:10 AM CST	Winter Storm Watch	MKX	35 hr
Dec 22, 4:10 AM CST	Winter Weather Advisory	MKX	42 hr
Dec 23, 3:01 PM CST	Winter Storm Warning	MKX	12 hr
Dec 23, 3:01 PM CST	Winter Weather Advisory	MKX	30 hr
Dec 25, 3:26 PM CST	Winter Weather Advisory	MKX	14 hr
Dec 26, 9:51 AM CST	Dense Fog Advisory	MKX	32 hr
Dec 26, 10:32 AM CST	Flash Flood Watch	MKX	33 hr
Dec 27, 4:34 AM CST	Areal Flood Advisory	MKX	4 hr
Dec 27, 1:47 PM CST	Areal Flood Advisory	MKX	3 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	23
Tornado Warning	4
Severe Thunderstorm Watch	11
Tornado Watch	9
Mesoscale Discussion	45
Flooding
Areal Flood Warning	4
Flash Flood Warning	6
Flash Flood Watch	5
Flood Watch	3
Areal Flood Advisory	7
Winter
Winter Storm Warning	9
Winter Storm Watch	10
Blowing Snow Advisory	3
Snow Advisory	5
Winter Weather Advisory	12
Cold
Wind Chill Warning	2
Wind Chill Watch	1
Frost Advisory	3
Wind Chill Advisory	6
Wind and dust
High Wind Watch	1
Wind Advisory	5
Fog and smoke
Dense Fog Advisory	10

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.