Weather alerts in Rock County, Wisconsin, 2010

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

Rock County and its neighbors

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

Alerts: 148
Warnings: 36
Watches: 34
Advisories: 40
Busiest month: July34 alerts
Busiest day: July 23, 201018 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 3 tornado warnings covering Rock County in 2010 had a tornado report inside them; 1 of 2 tornado reports fell inside a warning, on average 32 minutes after it went out.

Rock County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	2	33%	2	50%	32 min
Severe thunderstorm warnings	19	12	37%	13	77%	23 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 Milwaukee, WI: tornado warnings	43	18	58%	52	75%	21 min
NWS Milwaukee, WI: severe thunderstorm warnings	87	45	48%	167	63%	21 min
NWS Milwaukee, WI: flash flood warnings	21	7	67%	18	67%	138 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 1, 3:28 PM CST	Wind Chill Advisory	MKX	19 hr
Jan 6, 3:41 AM CST	Winter Storm Warning	MKX	48 hr
Jan 6, 3:41 AM CST	Winter Weather Advisory	MKX	48 hr
Jan 16, 9:58 PM CST	Freezing Fog Advisory	MKX	14 hr
Jan 20, 4:28 AM CST	Freezing Rain Advisory	MKX	28 hr
Jan 20, 10:34 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 21, 2:43 PM CST	Freezing Rain Advisory	MKX	2 hr
Jan 23, 1:24 PM CST	Dense Fog Advisory	MKX	21 hr
Feb 7, 3:05 PM CST	Winter Storm Watch	MKX	13 hr
Feb 8, 4:04 AM CST	Winter Storm Warning	MKX	45 hr
Feb 8, 4:04 AM CST	Winter Weather Advisory	MKX	45 hr
Feb 20, 4:19 AM CST	Winter Storm Watch	MKX	33 hr
Feb 21, 1:27 PM CST	Winter Weather Advisory	MKX	19 hr
Mar 7, 2:46 PM CST	Dense Fog Advisory	MKX	21 hr
Mar 8, 3:11 PM CST	Dense Fog Advisory	MKX	23 hr
Mar 9, 8:45 PM CST	River Flood Watch	MKX	4 days
Mar 10, 10:04 AM CST	Dense Fog Advisory	MKX	26 hr
Mar 10, 10:46 AM CST	River Flood Warning	MKX	5 days
Mar 11, 3:45 PM CST	Dense Fog Advisory	MKX	36 hr
Apr 5, 9:37 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 5, 11:07 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 6, 10:02 AM CDT	River Flood Watch	MKX	23 hr
Apr 6, 4:55 PM CDT	Mesoscale Discussion	SPC	65 min
Apr 6, 5:06 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 6, 7:36 PM CDT	Mesoscale Discussion	SPC	54 min
Apr 6, 9:51 PM CDT	Mesoscale Discussion	SPC	54 min
Apr 9, 6:32 AM CDT	River Flood Warning	MKX	38 hr
Apr 27, 11:34 AM CDT	Frost Advisory	MKX	20 hr
Apr 30, 12:41 PM CDT	Mesoscale Discussion	SPC	64 min
Apr 30, 1:05 PM CDT	Tornado Watch	SPC	9 hr
Apr 30, 2:41 PM CDT	Mesoscale Discussion	SPC	64 min
Apr 30, 4:22 PM CDT	Severe Thunderstorm Warning	MKX	23 min
Apr 30, 4:42 PM CDT	Severe Thunderstorm Warning	MKX	48 min
Apr 30, 5:37 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 30, 7:32 PM CDT	Mesoscale Discussion	SPC	58 min
May 5, 1:30 PM CDT	Wind Advisory	MKX	5 hr
May 7, 3:31 PM CDT	Freeze Watch	MKX	12 hr
May 8, 3:49 AM CDT	Frost Advisory	MKX	28 hr
May 13, 1:59 AM CDT	Flash Flood Watch	MKX	7 hr
May 13, 2:58 AM CDT	Areal Flood Advisory	MKX	5 hr
May 21, 10:40 AM CDT	Dense Fog Advisory	MKX	22 hr
May 25, 7:22 AM CDT	Severe Thunderstorm Warning	MKX	53 min
May 25, 3:10 PM CDT	Severe Thunderstorm Warning	MKX	35 min
May 25, 4:04 PM CDT	Areal Flood Advisory	MKX	83 min
May 26, 5:12 AM CDT	Dense Fog Advisory	MKX	115 min
May 31, 3:40 AM CDT	Severe Thunderstorm Warning	MKX	35 min
May 31, 4:08 AM CDT	Severe Thunderstorm Warning	MKX	52 min
Jun 2, 5:55 PM CDT	Mesoscale Discussion	SPC	65 min
Jun 5, 4:49 PM CDT	Areal Flood Advisory	MKX	4 hr
Jun 11, 5:01 PM CDT	Mesoscale Discussion	SPC	89 min
Jun 17, 11:00 PM CDT	Mesoscale Discussion	SPC	60 min
Jun 17, 11:23 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 18, 2:33 AM CDT	Mesoscale Discussion	SPC	27 min
Jun 18, 10:41 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 18, 12:14 PM CDT	Mesoscale Discussion	SPC	61 min
Jun 18, 12:29 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 18, 2:55 PM CDT	Severe Thunderstorm Warning	MKX	50 min
Jun 18, 3:24 PM CDT	Severe Thunderstorm Warning	MKX	51 min
Jun 21, 8:01 PM CDT	Tornado Warning	MKX	44 min
Jun 21, 8:10 PM CDT	Tornado Watch	SPC	3 hr
Jun 21, 9:00 PM CDT	Areal Flood Advisory	MKX	2 hr
Jun 21, 9:11 PM CDT	Severe Thunderstorm Warning	MKX	49 min
Jun 22, 2:52 PM CDT	Flash Flood Watch	MKX	24 hr
Jun 23, 2:47 AM CDT	Mesoscale Discussion	SPC	88 min
Jun 23, 3:38 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 26, 1:52 AM CDT	Mesoscale Discussion	SPC	83 min
Jun 27, 1:16 AM CDT	Mesoscale Discussion	SPC	89 min
Jun 27, 5:58 AM CDT	Mesoscale Discussion	SPC	92 min
Jul 12, 2:25 AM CDT	Dense Fog Advisory	MKX	6 hr
Jul 14, 3:16 AM CDT	Heat Advisory	MKX	16 hr
Jul 14, 5:57 PM CDT	Mesoscale Discussion	SPC	93 min
Jul 14, 6:53 PM CDT	Tornado Watch	SPC	8 hr
Jul 14, 9:25 PM CDT	Mesoscale Discussion	SPC	95 min
Jul 14, 11:47 PM CDT	Mesoscale Discussion	SPC	58 min
Jul 17, 11:59 PM CDT	Mesoscale Discussion	SPC	91 min
Jul 22, 3:28 AM CDT	Flash Flood Watch	MKX	21 hr
Jul 22, 3:01 PM CDT	Mesoscale Discussion	SPC	59 min
Jul 22, 3:26 PM CDT	Tornado Watch	SPC	6 hr
Jul 22, 5:24 PM CDT	Tornado Warning	MKX	36 min
Jul 22, 5:56 PM CDT	Tornado Warning	MKX	64 min
Jul 22, 7:56 PM CDT	Severe Thunderstorm Warning	MKX	49 min
Jul 22, 7:59 PM CDT	Flash Flood Warning	MKX	6 hr
Jul 22, 8:11 PM CDT	Mesoscale Discussion	SPC	64 min
Jul 22, 8:36 PM CDT	Severe Thunderstorm Warning	MKX	39 min
Jul 22, 8:52 PM CDT	Severe Thunderstorm Warning	MKX	38 min
Jul 22, 8:53 PM CDT	Tornado Watch	SPC	5 hr
Jul 22, 9:25 PM CDT	Severe Thunderstorm Warning	MKX	50 min
Jul 22, 10:08 PM CDT	River Flood Watch	MKX	48 hr
Jul 22, 10:08 PM CDT	River Flood Watch	MKX	12 hr
Jul 22, 11:00 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 23, 1:23 AM CDT	Mesoscale Discussion	SPC	52 min
Jul 23, 3:38 AM CDT	Flash Flood Watch	MKX	27 hr
Jul 23, 6:41 AM CDT	Areal Flood Advisory	MKX	4 hr
Jul 23, 10:11 AM CDT	River Flood Warning	MKX	20 days
Jul 23, 10:21 AM CDT	River Flood Watch	MKX	19 hr
Jul 23, 10:21 AM CDT	River Flood Watch	MKX	35 hr
Jul 23, 10:21 AM CDT	River Flood Watch	MKX	19 hr
Jul 23, 2:30 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 23, 9:52 PM CDT	River Flood Warning	MKX	4 days
Jul 23, 11:31 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 24, 9:38 PM CDT	River Flood Warning	MKX	3 days
Jul 27, 10:42 AM CDT	River Flood Warning	MKX	15 days
Jul 31, 8:49 PM CDT	River Flood Warning	MKX	33 hr
Jul 31, 9:29 PM CDT	Dense Fog Advisory	MKX	12 hr
Aug 8, 10:08 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 9, 2:20 AM CDT	Mesoscale Discussion	SPC	100 min
Aug 9, 2:24 AM CDT	Severe Thunderstorm Warning	MKX	51 min
Aug 11, 3:25 PM CDT	Heat Advisory	MKX	30 hr
Aug 13, 10:52 AM CDT	Flash Flood Watch	MKX	11 hr
Aug 13, 1:54 PM CDT	Mesoscale Discussion	SPC	66 min
Aug 13, 2:28 PM CDT	Tornado Watch	SPC	5 hr
Aug 13, 5:27 PM CDT	Mesoscale Discussion	SPC	63 min
Aug 13, 6:23 PM CDT	Areal Flood Advisory	MKX	3 hr
Aug 20, 1:33 PM CDT	Mesoscale Discussion	SPC	87 min
Aug 20, 1:42 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 20, 3:38 PM CDT	Severe Thunderstorm Warning	MKX	52 min
Aug 21, 9:00 PM CDT	Dense Fog Advisory	MKX	12 hr
Sep 2, 12:38 AM CDT	Dense Fog Advisory	MKX	7 hr
Sep 2, 6:21 PM CDT	Severe Thunderstorm Warning	MKX	39 min
Sep 6, 3:03 PM CDT	Wind Advisory	MKX	28 hr
Sep 21, 1:02 PM CDT	Mesoscale Discussion	SPC	88 min
Sep 21, 1:31 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 21, 3:40 PM CDT	Mesoscale Discussion	SPC	95 min
Sep 21, 3:48 PM CDT	Severe Thunderstorm Warning	MKX	57 min
Sep 21, 4:24 PM CDT	Severe Thunderstorm Warning	MKX	51 min
Oct 2, 3:41 AM CDT	Frost Advisory	MKX	29 hr
Oct 3, 2:56 PM CDT	Freeze Warning	MKX	17 hr
Oct 4, 6:10 AM CDT	Dense Fog Advisory	MKX	4 hr
Oct 4, 2:26 PM CDT	Frost Advisory	MKX	17 hr
Oct 24, 3:10 PM CDT	High Wind Watch	MKX	13 hr
Oct 25, 4:03 AM CDT	High Wind Warning	MKX	63 hr
Oct 25, 10:03 PM CDT	Tornado Watch	SPC	9 hr
Oct 26, 2:21 AM CDT	Mesoscale Discussion	SPC	114 min
Oct 26, 5:49 AM CDT	Severe Thunderstorm Warning	MKX	41 min
Oct 26, 6:00 AM CDT	Mesoscale Discussion	SPC	2 hr
Nov 22, 12:51 PM CST	Mesoscale Discussion	SPC	54 min
Nov 22, 1:16 PM CST	Tornado Watch	SPC	4 hr
Dec 2, 4:02 AM CST	Winter Storm Watch	MKX	24 hr
Dec 3, 4:02 AM CST	Winter Weather Advisory	MKX	38 hr
Dec 9, 3:28 AM CST	Winter Weather Advisory	MKX	18 hr
Dec 9, 1:07 PM CST	Winter Storm Watch	MKX	41 hr
Dec 10, 2:25 PM CST	Winter Storm Warning	MKX	28 hr
Dec 10, 9:51 PM CST	Dense Fog Advisory	MKX	4 hr
Dec 11, 1:56 PM CST	Blizzard Warning	MKX	25 hr
Dec 12, 3:07 PM CST	Wind Chill Advisory	MKX	20 hr
Dec 19, 2:45 PM CST	Winter Weather Advisory	MKX	42 hr
Dec 21, 9:50 AM CST	Dense Fog Advisory	MKX	13 hr
Dec 30, 7:01 AM CST	Dense Fog Advisory	MKX	38 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
Tornado Warning	3
Severe Thunderstorm Watch	8
Tornado Watch	8
Mesoscale Discussion	38
Flooding
Flash Flood Warning	1
River Flood Warning	7
Flash Flood Watch	5
River Flood Watch	7
Areal Flood Advisory	6
Winter
Blizzard Warning	1
Winter Storm Warning	3
Winter Storm Watch	4
Freezing Rain Advisory	2
Winter Weather Advisory	6
Heat
Heat Advisory	2
Cold
Freeze Warning	1
Freeze Watch	1
Frost Advisory	4
Wind Chill Advisory	2
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	2
Fog and smoke
Dense Fog Advisory	15
Freezing 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 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.