Alert archive / South Dakota / Brown County

Weather alerts in Brown County, South Dakota, 2016

152 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Brown County and its neighbors

Each county as a circle sized by its count in 2016. Tap one for its archive.

Alerts: 152
Warnings: 46
Watches: 22
Advisories: 33
Busiest month: July37 alerts
Busiest day: August 10, 201611 alerts

Over time

By month

Warning verification

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

Brown County, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	34	27	21%	32	78%	22 min
Flash flood warnings	1	0	100%	2	0%

Each office's whole area, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Aberdeen, SD: tornado warnings	16	4	75%	14	36%	8 min
NWS Aberdeen, SD: severe thunderstorm warnings	291	186	36%	362	83%	22 min
NWS Aberdeen, SD: flash flood warnings	7	3	57%	7	57%	36 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 3, 9:23 PM CST	Dense Fog Advisory	ABR	9 hr
Jan 6, 8:38 PM CST	Winter Weather Advisory	ABR	17 hr
Jan 9, 3:49 AM CST	Wind Chill Advisory	ABR	29 hr
Jan 15, 3:09 AM CST	Wind Chill Advisory	ABR	39 hr
Jan 16, 2:55 AM CST	Wind Chill Warning	ABR	31 hr
Jan 16, 2:55 AM CST	Wind Chill Advisory	ABR	48 hr
Feb 5, 3:56 AM CST	High Wind Watch	ABR	24 hr
Feb 6, 3:36 AM CST	High Wind Warning	ABR	44 hr
Feb 12, 3:14 PM CST	Winter Weather Advisory	ABR	42 hr
Feb 13, 10:08 PM CST	Winter Storm Warning	ABR	9 hr
Feb 18, 2:02 PM CST	Wind Advisory	ABR	25 hr
Mar 4, 5:34 AM CST	Freezing Rain Advisory	ABR	4 hr
Mar 14, 12:38 AM CDT	Dense Fog Advisory	ABR	11 hr
Apr 5, 3:15 AM CDT	Wind Advisory	ABR	31 hr
Apr 6, 3:19 PM CDT	Wind Advisory	ABR	28 hr
Apr 9, 2:42 AM CDT	Wind Advisory	ABR	15 hr
Apr 20, 3:24 AM CDT	Dense Fog Advisory	ABR	7 hr
May 10, 2:42 PM CDT	Mesoscale Discussion	SPC	93 min
May 13, 3:04 AM CDT	Freeze Warning	ABR	30 hr
May 14, 11:33 AM CDT	Frost Advisory	ABR	21 hr
May 22, 5:21 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
May 22, 9:06 PM CDT	Mesoscale Discussion	SPC	114 min
May 25, 6:10 PM CDT	Mesoscale Discussion	SPC	65 min
May 26, 8:12 PM CDT	Severe Thunderstorm Warning	ABR	33 min
May 26, 8:31 PM CDT	Severe Thunderstorm Warning	ABR	19 min
May 30, 2:16 PM CDT	Mesoscale Discussion	SPC	59 min
May 30, 2:48 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 30, 6:37 PM CDT	Mesoscale Discussion	SPC	113 min
May 30, 7:53 PM CDT	Severe Thunderstorm Warning	ABR	45 min
May 30, 8:37 PM CDT	Special Weather Statement	ABR	38 min
Jun 2, 5:04 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 3, 1:28 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 3, 1:29 PM CDT	Special Weather Statement	ABR	31 min
Jun 3, 1:35 PM CDT	Severe Thunderstorm Warning	ABR	25 min
Jun 3, 1:58 PM CDT	Special Weather Statement	ABR	47 min
Jun 3, 2:08 PM CDT	Severe Thunderstorm Warning	ABR	19 min
Jun 3, 2:24 PM CDT	Severe Thunderstorm Warning	ABR	51 min
Jun 10, 3:38 AM CDT	Special Weather Statement	ABR	52 min
Jun 12, 2:30 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 21, 8:35 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 21, 11:30 PM CDT	Mesoscale Discussion	SPC	60 min
Jun 22, 1:15 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 22, 2:36 AM CDT	Severe Thunderstorm Warning	ABR	39 min
Jun 22, 3:13 AM CDT	Severe Thunderstorm Warning	ABR	33 min
Jul 4, 3:00 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 4, 5:35 PM CDT	Mesoscale Discussion	SPC	85 min
Jul 4, 5:38 PM CDT	Severe Thunderstorm Warning	ABR	37 min
Jul 4, 6:17 PM CDT	Severe Thunderstorm Warning	ABR	28 min
Jul 4, 8:29 PM CDT	Mesoscale Discussion	SPC	91 min
Jul 9, 3:04 PM CDT	Heat Advisory	ABR	28 hr
Jul 9, 8:32 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 9, 10:44 PM CDT	Mesoscale Discussion	SPC	91 min
Jul 9, 11:56 PM CDT	Special Weather Statement	ABR	64 min
Jul 10, 10:16 PM CDT	Mesoscale Discussion	SPC	89 min
Jul 10, 10:40 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 11, 12:16 AM CDT	Special Weather Statement	ABR	59 min
Jul 11, 4:06 AM CDT	Mesoscale Discussion	SPC	84 min
Jul 11, 7:27 PM CDT	Special Weather Statement	ABR	33 min
Jul 11, 7:54 PM CDT	Special Weather Statement	ABR	36 min
Jul 11, 8:15 PM CDT	Special Weather Statement	ABR	30 min
Jul 16, 12:27 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 16, 1:09 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 16, 3:17 PM CDT	Special Weather Statement	ABR	58 min
Jul 16, 3:18 PM CDT	Mesoscale Discussion	SPC	87 min
Jul 16, 3:34 PM CDT	Severe Thunderstorm Warning	ABR	41 min
Jul 16, 5:09 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 16, 6:57 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 16, 10:30 PM CDT	Severe Thunderstorm Warning	ABR	60 min
Jul 16, 10:53 PM CDT	Mesoscale Discussion	SPC	67 min
Jul 16, 11:09 PM CDT	Severe Thunderstorm Warning	ABR	66 min
Jul 18, 3:45 AM CDT	Excessive Heat Watch	ABR	24 hr
Jul 19, 3:35 AM CDT	Excessive Heat Warning	ABR	4 days
Jul 22, 12:28 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 22, 1:48 PM CDT	Severe Thunderstorm Warning	ABR	42 min
Jul 22, 2:16 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 22, 2:19 PM CDT	Severe Thunderstorm Warning	ABR	41 min
Jul 22, 2:55 PM CDT	Severe Thunderstorm Warning	ABR	50 min
Jul 23, 1:41 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 26, 8:50 AM CDT	Special Weather Statement	ABR	25 min
Jul 26, 10:56 AM CDT	Severe Thunderstorm Warning	ABR	20 min
Jul 26, 12:09 PM CDT	Mesoscale Discussion	SPC	96 min
Aug 1, 2:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 1, 3:19 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 1, 6:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 1, 9:02 PM CDT	Severe Thunderstorm Warning	ABR	43 min
Aug 1, 9:43 PM CDT	Severe Thunderstorm Warning	ABR	47 min
Aug 1, 9:45 PM CDT	Mesoscale Discussion	SPC	90 min
Aug 1, 10:14 PM CDT	Severe Thunderstorm Warning	ABR	46 min
Aug 1, 10:33 PM CDT	Severe Thunderstorm Warning	ABR	42 min
Aug 1, 10:57 PM CDT	Severe Thunderstorm Warning	ABR	48 min
Aug 1, 11:20 PM CDT	Severe Thunderstorm Warning	ABR	55 min
Aug 3, 3:39 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 3, 6:29 PM CDT	Mesoscale Discussion	SPC	91 min
Aug 3, 10:35 PM CDT	Severe Thunderstorm Warning	ABR	40 min
Aug 3, 10:59 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 3, 11:16 PM CDT	Severe Thunderstorm Warning	ABR	44 min
Aug 3, 11:58 PM CDT	Severe Thunderstorm Warning	ABR	32 min
Aug 9, 3:01 PM CDT	Heat Advisory	ABR	29 hr
Aug 9, 9:51 PM CDT	Mesoscale Discussion	SPC	114 min
Aug 9, 10:19 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 10, 1:05 AM CDT	Mesoscale Discussion	SPC	55 min
Aug 10, 1:34 AM CDT	Severe Thunderstorm Warning	ABR	56 min
Aug 10, 2:05 AM CDT	Severe Thunderstorm Warning	ABR	40 min
Aug 10, 2:18 AM CDT	Severe Thunderstorm Warning	ABR	57 min
Aug 10, 4:02 AM CDT	Special Weather Statement	ABR	28 min
Aug 10, 11:19 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 10, 1:15 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 10, 3:45 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 10, 4:03 PM CDT	Severe Thunderstorm Warning	ABR	42 min
Aug 10, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 10, 9:22 PM CDT	Severe Thunderstorm Warning	ABR	38 min
Aug 10, 9:36 PM CDT	Severe Thunderstorm Warning	ABR	39 min
Aug 10, 9:57 PM CDT	Severe Thunderstorm Warning	ABR	33 min
Aug 10, 10:14 PM CDT	Severe Thunderstorm Warning	ABR	46 min
Aug 10, 10:50 PM CDT	Mesoscale Discussion	SPC	85 min
Aug 18, 3:59 AM CDT	Special Weather Statement	ABR	46 min
Aug 27, 1:32 PM CDT	Mesoscale Discussion	SPC	118 min
Aug 28, 5:15 PM CDT	Mesoscale Discussion	SPC	90 min
Sep 1, 9:10 PM CDT	Wind Advisory	ABR	22 hr
Sep 4, 4:01 PM CDT	Mesoscale Discussion	SPC	89 min
Sep 4, 4:53 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 4, 6:56 PM CDT	Mesoscale Discussion	SPC	94 min
Sep 4, 9:16 PM CDT	Mesoscale Discussion	SPC	59 min
Sep 7, 2:11 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 7, 3:19 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 7, 5:16 PM CDT	Special Weather Statement	ABR	29 min
Sep 7, 5:44 PM CDT	Mesoscale Discussion	SPC	61 min
Oct 5, 2:37 AM CDT	Wind Advisory	ABR	16 hr
Oct 5, 3:16 PM CDT	Frost Advisory	ABR	19 hr
Oct 6, 3:06 PM CDT	Freeze Warning	ABR	19 hr
Oct 17, 12:56 AM CDT	Dense Fog Advisory	ABR	3 hr
Nov 16, 3:39 AM CST	Blizzard Watch	ABR	24 hr
Nov 17, 3:53 AM CST	Blizzard Warning	ABR	38 hr
Nov 17, 3:53 AM CST	Winter Weather Advisory	ABR	32 hr
Nov 28, 3:38 AM CST	Winter Weather Advisory	ABR	56 hr
Dec 5, 3:52 AM CST	Wind Advisory	ABR	41 hr
Dec 5, 4:08 AM CST	Winter Weather Advisory	ABR	50 hr
Dec 10, 2:05 PM CST	Winter Weather Advisory	ABR	17 hr
Dec 12, 3:50 PM CST	Wind Chill Advisory	ABR	18 hr
Dec 14, 2:43 AM CST	Wind Chill Advisory	ABR	30 hr
Dec 15, 2:49 PM CST	Winter Weather Advisory	ABR	42 hr
Dec 16, 3:37 AM CST	Wind Chill Warning	ABR	56 hr
Dec 18, 11:54 AM CST	Wind Chill Advisory	ABR	3 hr
Dec 20, 3:22 PM CST	Wind Advisory	ABR	26 hr
Dec 22, 4:53 AM CST	Winter Storm Watch	ABR	48 hr
Dec 23, 3:06 PM CST	Blizzard Warning	ABR	72 hr
Dec 24, 4:28 AM CST	Freezing Rain Advisory	ABR	41 hr
Dec 24, 9:44 PM CST	Ice Storm Warning	ABR	29 hr
Dec 25, 6:13 PM CST	Flash Flood Warning	ABR	6 hr
Dec 25, 9:36 PM CST	High Wind Warning	ABR	11 hr
Dec 26, 8:48 AM CST	Winter Weather Advisory	ABR	6 hr
Dec 26, 11:57 AM CST	Wind Advisory	ABR	6 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	34
Severe Thunderstorm Watch	18
Mesoscale Discussion	37
Special Weather Statement	14
Flooding
Flash Flood Warning	1
Winter
Blizzard Warning	2
Ice Storm Warning	1
Winter Storm Warning	1
Blizzard Watch	1
Winter Storm Watch	1
Freezing Rain Advisory	2
Winter Weather Advisory	8
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	2
Cold
Freeze Warning	2
Wind Chill Warning	2
Frost Advisory	2
Wind Chill Advisory	6
Wind and dust
High Wind Warning	2
High Wind Watch	1
Wind Advisory	9
Fog and smoke
Dense Fog Advisory	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2015 2017

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.