Alert archive / South Dakota / Marshall County

Weather alerts in Marshall County, South Dakota, 2012

117 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Marshall County and its neighbors

Each county as a circle sized by its count in 2012. Tap one for its archive.

Alerts: 117
Warnings: 30
Watches: 15
Advisories: 45
Busiest month: June29 alerts
Busiest day: June 17, 201211 alerts

Over time

By month

Warning verification

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

0 of 2 tornado warnings covering Marshall County in 2012 had a tornado report inside them.

Marshall County, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	0
Severe thunderstorm warnings	20	15	25%	7	100%	11 min
Flash flood warnings	0			0

Each office's whole area, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Aberdeen, SD: tornado warnings	13	5	62%	9	56%	16 min
NWS Aberdeen, SD: severe thunderstorm warnings	189	124	34%	274	84%	22 min
NWS Aberdeen, SD: flash flood warnings	5	4	20%	8	100%	60 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 10, 2:20 PM CST	Wind Advisory	ABR	28 hr
Jan 18, 3:18 AM CST	Extreme Cold Warning	ABR	33 hr
Jan 20, 3:24 PM CST	Winter Storm Watch	ABR	12 hr
Jan 21, 3:21 AM CST	Winter Weather Advisory	ABR	45 hr
Jan 25, 9:01 AM CST	Dense Fog Advisory	ABR	3 hr
Feb 2, 5:33 AM CST	Dense Fog Advisory	ABR	3 hr
Feb 2, 5:45 PM CST	Dense Fog Advisory	ABR	42 hr
Feb 19, 2:37 PM CST	Winter Weather Advisory	ABR	33 hr
Feb 25, 2:24 PM CST	Winter Weather Advisory	ABR	25 hr
Feb 26, 3:21 AM CST	Winter Storm Watch	ABR	12 hr
Feb 26, 3:20 PM CST	Blizzard Watch	ABR	23 hr
Feb 27, 2:19 PM CST	Blizzard Warning	ABR	47 hr
Feb 27, 2:19 PM CST	Winter Storm Warning	ABR	47 hr
Feb 28, 2:43 PM CST	Mesoscale Discussion	SPC	5 hr
Feb 28, 8:41 PM CST	Mesoscale Discussion	SPC	6 hr
Mar 1, 3:17 AM CST	Dense Fog Advisory	ABR	8 hr
Mar 2, 5:38 PM CST	Winter Weather Advisory	ABR	6 hr
Mar 4, 8:22 AM CST	Winter Weather Advisory	ABR	4 hr
Mar 5, 12:23 AM CST	Dense Fog Advisory	ABR	6 hr
Mar 23, 1:19 AM CDT	Dense Fog Advisory	ABR	10 hr
Mar 25, 3:19 PM CDT	High Wind Watch	ABR	20 hr
Mar 26, 3:20 AM CDT	Wind Advisory	ABR	16 hr
Mar 26, 11:45 AM CDT	High Wind Warning	ABR	28 hr
Mar 26, 7:14 PM CDT	Wind Advisory	ABR	24 hr
Mar 30, 12:02 AM CDT	Dense Fog Advisory	ABR	11 hr
Apr 1, 3:58 AM CDT	Dense Fog Advisory	ABR	6 hr
Apr 1, 10:57 PM CDT	Wind Advisory	ABR	21 hr
Apr 5, 3:10 PM CDT	Wind Advisory	ABR	29 hr
Apr 7, 3:32 AM CDT	Wind Advisory	ABR	16 hr
Apr 14, 3:28 PM CDT	Wind Advisory	ABR	31 hr
Apr 15, 5:32 PM CDT	High Wind Warning	ABR	10 hr
Apr 15, 10:12 PM CDT	Wind Advisory	ABR	5 hr
May 2, 7:20 PM CDT	Mesoscale Discussion	SPC	55 min
May 5, 2:57 PM CDT	Flash Flood Watch	ABR	8 hr
May 5, 9:13 PM CDT	Severe Thunderstorm Warning	ABR	41 min
May 7, 9:52 AM CDT	Wind Advisory	ABR	8 hr
May 10, 5:06 PM CDT	Wind Advisory	ABR	10 hr
May 21, 3:02 PM CDT	Wind Advisory	ABR	23 hr
May 22, 5:54 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 22, 8:41 PM CDT	Mesoscale Discussion	SPC	64 min
May 26, 5:43 AM CDT	Mesoscale Discussion	SPC	92 min
May 26, 10:39 PM CDT	Severe Thunderstorm Warning	ABR	66 min
May 26, 11:20 PM CDT	Severe Thunderstorm Warning	ABR	25 min
May 26, 11:43 PM CDT	Severe Thunderstorm Warning	ABR	32 min
May 26, 11:57 PM CDT	Mesoscale Discussion	SPC	93 min
May 28, 8:12 AM CDT	Severe Thunderstorm Warning	ABR	19 min
Jun 1, 6:17 PM CDT	Severe Thunderstorm Warning	ABR	43 min
Jun 1, 6:59 PM CDT	Severe Thunderstorm Warning	ABR	46 min
Jun 9, 10:08 PM CDT	Mesoscale Discussion	SPC	67 min
Jun 10, 12:45 AM CDT	Mesoscale Discussion	SPC	60 min
Jun 10, 1:07 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 10, 3:53 AM CDT	Severe Thunderstorm Warning	ABR	37 min
Jun 10, 4:15 AM CDT	Severe Thunderstorm Warning	ABR	18 min
Jun 11, 2:49 AM CDT	Wind Advisory	ABR	13 hr
Jun 13, 9:34 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 13, 10:53 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 14, 2:59 AM CDT	Severe Thunderstorm Warning	ABR	46 min
Jun 14, 3:00 AM CDT	Severe Thunderstorm Warning	ABR	30 min
Jun 14, 3:01 AM CDT	Mesoscale Discussion	SPC	89 min
Jun 14, 3:30 AM CDT	Severe Thunderstorm Warning	ABR	30 min
Jun 17, 2:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 17, 3:45 PM CDT	Tornado Watch	SPC	6 hr
Jun 17, 5:06 PM CDT	Severe Thunderstorm Warning	ABR	39 min
Jun 17, 5:32 PM CDT	Severe Thunderstorm Warning	ABR	58 min
Jun 17, 5:34 PM CDT	Tornado Warning	ABR	26 min
Jun 17, 5:45 PM CDT	Severe Thunderstorm Warning	ABR	45 min
Jun 17, 5:52 PM CDT	Mesoscale Discussion	SPC	83 min
Jun 17, 5:53 PM CDT	Severe Thunderstorm Warning	ABR	47 min
Jun 17, 5:53 PM CDT	Severe Thunderstorm Warning	ABR	52 min
Jun 17, 5:59 PM CDT	Tornado Warning	ABR	31 min
Jun 17, 6:40 PM CDT	Severe Thunderstorm Warning	ABR	65 min
Jun 18, 10:08 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 19, 2:39 AM CDT	Mesoscale Discussion	SPC	66 min
Jun 19, 2:43 AM CDT	Severe Thunderstorm Warning	ABR	29 min
Jun 19, 4:56 PM CDT	Mesoscale Discussion	SPC	94 min
Jul 1, 2:44 PM CDT	Heat Advisory	ABR	3 days
Jul 12, 2:17 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 14, 3:00 PM CDT	Heat Advisory	ABR	53 hr
Jul 19, 1:56 PM CDT	Mesoscale Discussion	SPC	64 min
Jul 22, 4:38 PM CDT	Mesoscale Discussion	SPC	97 min
Jul 22, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jul 22, 8:13 PM CDT	Mesoscale Discussion	SPC	62 min
Jul 24, 11:24 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 25, 5:24 AM CDT	Mesoscale Discussion	SPC	66 min
Jul 25, 1:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 29, 3:50 PM CDT	Mesoscale Discussion	SPC	115 min
Jul 29, 5:49 PM CDT	Mesoscale Discussion	SPC	86 min
Aug 3, 2:14 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 3, 5:34 PM CDT	Severe Thunderstorm Warning	ABR	56 min
Aug 3, 6:19 PM CDT	Mesoscale Discussion	SPC	86 min
Aug 28, 1:27 AM CDT	Mesoscale Discussion	SPC	3 hr
Sep 8, 3:22 PM CDT	Frost Advisory	ABR	17 hr
Sep 12, 3:00 PM CDT	Frost Advisory	ABR	17 hr
Sep 17, 1:51 PM CDT	Frost Advisory	ABR	19 hr
Sep 19, 3:15 AM CDT	Wind Advisory	ABR	17 hr
Sep 21, 3:10 PM CDT	Freeze Watch	ABR	12 hr
Sep 22, 3:04 AM CDT	Freeze Warning	ABR	30 hr
Oct 2, 3:27 PM CDT	Wind Advisory	ABR	52 hr
Oct 12, 11:29 AM CDT	Wind Advisory	ABR	8 hr
Oct 16, 12:04 PM CDT	High Wind Watch	ABR	27 hr
Oct 16, 12:04 PM CDT	Wind Advisory	ABR	66 hr
Oct 23, 9:49 AM CDT	Dense Fog Advisory	ABR	3 hr
Nov 10, 4:05 AM CST	Winter Weather Advisory	ABR	24 hr
Nov 10, 5:10 PM CST	Mesoscale Discussion	SPC	5 hr
Nov 21, 4:05 AM CST	Wind Advisory	ABR	41 hr
Dec 2, 12:23 AM CST	Dense Fog Advisory	ABR	8 hr
Dec 7, 4:08 AM CST	Winter Storm Watch	ABR	24 hr
Dec 8, 4:02 AM CST	Blizzard Warning	ABR	38 hr
Dec 8, 4:02 AM CST	Winter Storm Warning	ABR	23 hr
Dec 8, 5:58 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 9, 9:01 PM CST	Wind Chill Advisory	ABR	12 hr
Dec 11, 7:15 PM CST	Winter Weather Advisory	ABR	14 hr
Dec 13, 7:48 PM CST	Dense Fog Advisory	ABR	13 hr
Dec 14, 3:39 AM CST	Winter Weather Advisory	ABR	38 hr
Dec 17, 6:03 AM CST	Dense Fog Advisory	ABR	6 hr
Dec 21, 3:28 AM CST	Dense Fog Advisory	ABR	8 hr
Dec 24, 3:31 AM CST	Wind Chill Advisory	ABR	30 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	20
Tornado Warning	2
Severe Thunderstorm Watch	6
Tornado Watch	1
Mesoscale Discussion	27
Flooding
Flash Flood Watch	1
Winter
Blizzard Warning	2
Winter Storm Warning	2
Blizzard Watch	1
Winter Storm Watch	3
Winter Weather Advisory	8
Heat
Heat Advisory	2
Cold
Extreme Cold Warning	1
Freeze Warning	1
Freeze Watch	1
Frost Advisory	3
Wind Chill Advisory	2
Wind and dust
High Wind Warning	2
High Wind Watch	2
Wind Advisory	17
Fog and smoke
Dense Fog Advisory	13

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2011 2013

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.