Alert archive / South Dakota / Butte County

Weather alerts in Butte County, South Dakota, 2017

108 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Butte County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts: 108
Warnings: 17
Watches: 9
Advisories: 40
Busiest month: July20 alerts
Busiest day: June 11, 20175 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 1 tornado reports fell inside a warning.

Butte County, 2017

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			1	0%
Severe thunderstorm warnings	9	6	33%	19	95%	39 min
Flash flood warnings	0			0

Each office's whole area, 2017

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Rapid City, SD: tornado warnings	4	1	75%	3	33%	21 min
NWS Rapid City, SD: severe thunderstorm warnings	183	121	34%	257	88%	27 min
NWS Rapid City, SD: flash flood warnings	4	1	75%	1	100%	142 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 1, 1:37 PM MST	Winter Weather Advisory	UNR	28 hr
Jan 2, 6:17 PM MST	Wind Chill Advisory	UNR	4 days
Jan 3, 9:58 AM MST	Wind Chill Advisory	UNR	71 hr
Jan 8, 12:37 PM MST	Winter Weather Advisory	UNR	6 hr
Jan 9, 2:14 PM MST	Winter Weather Advisory	UNR	21 hr
Jan 11, 1:51 PM MST	Wind Chill Advisory	UNR	21 hr
Jan 12, 2:15 PM MST	Wind Chill Advisory	UNR	18 hr
Jan 23, 1:38 PM MST	Winter Weather Advisory	UNR	39 hr
Jan 27, 9:32 AM MST	Winter Weather Advisory	UNR	13 hr
Jan 28, 2:44 AM MST	Winter Weather Advisory	UNR	14 hr
Jan 28, 3:24 AM MST	Wind Advisory	UNR	14 hr
Jan 29, 5:35 AM MST	Wind Advisory	UNR	7 hr
Jan 30, 2:22 AM MST	Wind Advisory	UNR	13 hr
Feb 21, 5:03 PM MST	Special Weather Statement	UNR	27 min
Mar 5, 3:06 AM MST	High Wind Watch	UNR	231 days
Mar 5, 3:14 PM MST	High Wind Warning	UNR	27 hr
Mar 6, 3:02 AM MST	High Wind Watch	UNR	233 days
Mar 7, 3:16 AM MST	High Wind Warning	UNR	16 hr
Mar 9, 2:29 PM MST	Winter Weather Advisory	UNR	30 hr
Mar 11, 1:45 PM MST	Wind Advisory	UNR	30 hr
Mar 20, 2:20 PM MDT	Winter Weather Advisory	UNR	16 hr
Mar 21, 4:43 PM MDT	Dense Fog Advisory	UNR	109 min
Mar 21, 6:32 PM MDT	Freezing Fog Advisory	UNR	4 hr
Apr 9, 3:31 AM MDT	Winter Weather Advisory	UNR	29 hr
Apr 12, 2:27 PM MDT	Wind Advisory	UNR	32 hr
Apr 17, 8:09 PM MDT	Severe Thunderstorm Warning	UNR	81 min
Apr 17, 8:24 PM MDT	Special Weather Statement	UNR	36 min
Apr 17, 8:40 PM MDT	Severe Thunderstorm Warning	UNR	65 min
Apr 24, 2:46 PM MDT	Winter Weather Advisory	UNR	24 hr
Apr 30, 2:01 PM MDT	Wind Advisory	UNR	29 hr
May 7, 2:30 PM MDT	Wind Advisory	UNR	22 hr
May 7, 5:35 PM MDT	Mesoscale Discussion	SPC	2 hr
May 13, 4:41 PM MDT	Mesoscale Discussion	SPC	64 min
May 13, 7:06 PM MDT	Special Weather Statement	UNR	39 min
May 13, 7:48 PM MDT	Special Weather Statement	UNR	42 min
May 15, 3:07 PM MDT	Mesoscale Discussion	SPC	113 min
May 15, 4:40 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 15, 6:34 PM MDT	Mesoscale Discussion	SPC	56 min
May 15, 7:33 PM MDT	Special Weather Statement	UNR	42 min
May 15, 9:53 PM MDT	Mesoscale Discussion	SPC	67 min
May 20, 2:29 PM MDT	Frost Advisory	UNR	12 hr
May 28, 2:54 PM MDT	Mesoscale Discussion	SPC	66 min
May 28, 2:56 PM MDT	Special Weather Statement	UNR	34 min
May 29, 1:39 PM MDT	Frost Advisory	UNR	17 hr
Jun 5, 4:01 PM MDT	Mesoscale Discussion	SPC	59 min
Jun 10, 8:44 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 9:01 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 10, 10:56 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 11, 12:40 AM MDT	Special Weather Statement	UNR	35 min
Jun 11, 1:05 AM MDT	Severe Thunderstorm Warning	UNR	55 min
Jun 12, 5:35 PM MDT	Tornado Watch	SPC	8 hr
Jun 12, 8:02 PM MDT	Mesoscale Discussion	SPC	58 min
Jun 16, 1:55 PM MDT	Wind Advisory	UNR	29 hr
Jun 20, 8:46 PM MDT	Special Weather Statement	UNR	29 min
Jun 20, 9:23 PM MDT	Special Weather Statement	UNR	52 min
Jun 27, 8:03 PM MDT	Special Weather Statement	UNR	27 min
Jun 28, 2:28 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 29, 4:29 PM MDT	Special Weather Statement	UNR	31 min
Jul 2, 5:19 PM MDT	Special Weather Statement	UNR	41 min
Jul 2, 6:18 PM MDT	Special Weather Statement	UNR	27 min
Jul 2, 6:47 PM MDT	Special Weather Statement	UNR	43 min
Jul 5, 2:09 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 7, 4:11 PM MDT	Special Weather Statement	UNR	49 min
Jul 10, 3:49 PM MDT	Special Weather Statement	UNR	41 min
Jul 10, 4:08 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 10, 4:47 PM MDT	Mesoscale Discussion	SPC	88 min
Jul 18, 2:22 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 18, 5:59 PM MDT	Severe Thunderstorm Warning	UNR	61 min
Jul 18, 6:55 PM MDT	Severe Thunderstorm Warning	UNR	65 min
Jul 18, 6:58 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 18, 7:37 PM MDT	Severe Thunderstorm Warning	UNR	53 min
Jul 20, 2:50 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 20, 5:48 PM MDT	Severe Thunderstorm Warning	UNR	72 min
Jul 20, 8:42 PM MDT	Special Weather Statement	UNR	48 min
Jul 27, 12:35 PM MDT	Special Weather Statement	UNR	25 min
Jul 27, 1:10 PM MDT	Special Weather Statement	UNR	35 min
Jul 31, 2:56 PM MDT	Special Weather Statement	UNR	49 min
Jul 31, 3:35 PM MDT	Special Weather Statement	UNR	40 min
Aug 14, 4:36 PM MDT	Mesoscale Discussion	SPC	114 min
Aug 14, 6:37 PM MDT	Severe Thunderstorm Warning	UNR	53 min
Aug 14, 7:46 PM MDT	Special Weather Statement	UNR	44 min
Aug 14, 8:16 PM MDT	Severe Thunderstorm Warning	UNR	33 min
Aug 25, 2:46 PM MDT	Mesoscale Discussion	SPC	89 min
Aug 26, 3:24 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 26, 3:35 PM MDT	Special Weather Statement	UNR	40 min
Sep 16, 1:36 PM MDT	Frost Advisory	UNR	15 hr
Oct 3, 3:08 AM MDT	Freeze Warning	UNR	29 hr
Oct 6, 1:49 PM MDT	Wind Advisory	UNR	24 hr
Oct 20, 2:45 PM MDT	Wind Advisory	UNR	27 hr
Oct 22, 2:46 PM MDT	High Wind Warning	UNR	27 hr
Oct 25, 2:10 PM MDT	High Wind Warning	UNR	29 hr
Oct 28, 2:41 PM MDT	Wind Advisory	UNR	48 hr
Nov 23, 1:00 PM MST	Wind Advisory	UNR	24 hr
Nov 27, 3:24 AM MST	Wind Advisory	UNR	17 hr
Nov 28, 2:25 AM MST	High Wind Watch	UNR	24 hr
Nov 29, 2:44 AM MST	High Wind Warning	UNR	15 hr
Dec 3, 3:10 AM MST	Winter Weather Advisory	UNR	38 hr
Dec 4, 9:15 AM MST	Wind Advisory	UNR	8 hr
Dec 4, 6:14 PM MST	High Wind Watch	UNR	9 hr
Dec 5, 3:34 AM MST	High Wind Warning	UNR	14 hr
Dec 6, 3:15 AM MST	Wind Advisory	UNR	11 hr
Dec 10, 2:54 AM MST	High Wind Watch	UNR	12 hr
Dec 10, 2:54 PM MST	Wind Advisory	UNR	25 hr
Dec 12, 1:44 PM MST	Wind Advisory	UNR	23 hr
Dec 13, 2:06 PM MST	Wind Advisory	UNR	23 hr
Dec 25, 3:17 AM MST	Wind Chill Advisory	UNR	32 hr
Dec 28, 2:37 PM MST	Winter Weather Advisory	UNR	50 hr
Dec 30, 2:58 AM MST	Wind Chill Warning	UNR	56 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	9
Severe Thunderstorm Watch	3
Tornado Watch	1
Mesoscale Discussion	19
Special Weather Statement	23
Winter
Winter Weather Advisory	12
Cold
Freeze Warning	1
Wind Chill Warning	1
Frost Advisory	3
Wind Chill Advisory	5
Wind and dust
High Wind Warning	6
High Wind Watch	5
Wind Advisory	18
Fog and smoke
Dense Fog Advisory	1
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 2016 2018

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.