Alert archive / South Dakota / Custer County

Weather alerts in Custer County, South Dakota, 2010

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

Custer County and its neighbors

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

Alerts: 199
Warnings: 73
Watches: 37
Advisories: 59
Busiest month: June54 alerts
Busiest day: May 24, 201019 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 3 tornado warnings covering Custer County in 2010 had a tornado report inside them.

Custer County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	0	100%	0
Severe thunderstorm warnings	57	45	21%	31	84%	22 min
Flash flood warnings	1	1	0%	3	67%	47 min

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Rapid City, SD: tornado warnings	22	4	82%	11	45%	20 min
NWS Rapid City, SD: severe thunderstorm warnings	323	259	20%	520	90%	27 min
NWS Rapid City, SD: flash flood warnings	9	5	44%	22	95%	110 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 4, 8:10 AM MST	Dense Fog Advisory	UNR	19 hr
Jan 5, 3:37 AM MST	Winter Weather Advisory	UNR	41 hr
Jan 6, 9:10 AM MST	Winter Storm Warning	UNR	11 hr
Jan 6, 8:31 PM MST	Wind Chill Advisory	UNR	38 hr
Jan 20, 1:35 PM MST	Winter Storm Watch	UNR	61 hr
Jan 20, 5:26 PM MST	Dense Fog Advisory	UNR	35 hr
Jan 21, 1:40 PM MST	Winter Weather Advisory	UNR	32 hr
Jan 23, 2:53 AM MST	Winter Weather Advisory	UNR	62 hr
Jan 24, 2:01 AM MST	Wind Advisory	UNR	39 hr
Feb 3, 2:45 PM MST	Winter Weather Advisory	UNR	47 hr
Feb 4, 7:51 PM MST	Winter Storm Warning	UNR	8 hr
Feb 7, 3:58 AM MST	Wind Chill Advisory	UNR	46 hr
Feb 12, 2:34 PM MST	Winter Weather Advisory	UNR	44 hr
Mar 2, 6:03 PM MST	Dense Fog Advisory	UNR	41 hr
Mar 4, 5:57 PM MST	Dense Fog Advisory	UNR	21 hr
Mar 5, 3:43 AM MST	Winter Weather Advisory	UNR	31 hr
Mar 7, 8:44 PM MST	Dense Fog Advisory	UNR	37 hr
Mar 9, 4:34 AM MST	Winter Storm Watch	UNR	9 hr
Mar 9, 1:30 PM MST	Winter Weather Advisory	UNR	45 hr
Mar 13, 2:35 PM MST	Dense Fog Advisory	UNR	15 hr
Mar 18, 3:08 AM MDT	Winter Weather Advisory	UNR	24 hr
Mar 27, 2:29 AM MDT	Wind Advisory	UNR	16 hr
Mar 30, 3:15 AM MDT	Winter Storm Watch	UNR	24 hr
Mar 31, 3:07 AM MDT	Winter Weather Advisory	UNR	30 hr
Apr 1, 3:03 AM MDT	Winter Weather Advisory	UNR	35 hr
Apr 5, 2:49 PM MDT	Winter Weather Advisory	UNR	30 hr
Apr 12, 6:09 PM MDT	Wind Advisory	UNR	25 hr
Apr 13, 11:19 AM MDT	Mesoscale Discussion	SPC	86 min
Apr 13, 12:35 PM MDT	Severe Thunderstorm Warning	UNR	38 min
Apr 22, 4:32 AM MDT	Flood Watch	UNR	34 hr
Apr 23, 2:27 PM MDT	Wind Advisory	UNR	24 hr
Apr 23, 7:07 PM MDT	Areal Flood Advisory	UNR	6 hr
Apr 29, 2:23 PM MDT	Wind Advisory	UNR	52 hr
Apr 29, 2:50 PM MDT	Winter Weather Advisory	UNR	45 hr
May 3, 3:24 AM MDT	High Wind Watch	UNR	24 hr
May 4, 2:54 AM MDT	Wind Advisory	UNR	16 hr
May 7, 2:27 PM MDT	Freeze Warning	UNR	18 hr
May 11, 3:00 AM MDT	Winter Storm Watch	UNR	12 hr
May 11, 3:09 PM MDT	Winter Storm Warning	UNR	29 hr
May 11, 3:09 PM MDT	Winter Weather Advisory	UNR	29 hr
May 21, 1:30 PM MDT	Mesoscale Discussion	SPC	60 min
May 21, 2:26 PM MDT	Tornado Watch	SPC	8 hr
May 21, 5:45 PM MDT	Severe Thunderstorm Warning	UNR	60 min
May 21, 6:40 PM MDT	Severe Thunderstorm Warning	UNR	28 min
May 21, 7:11 PM MDT	Severe Thunderstorm Warning	UNR	33 min
May 21, 9:07 PM MDT	Mesoscale Discussion	SPC	53 min
May 21, 9:58 PM MDT	Severe Thunderstorm Watch	SPC	3 hr
May 21, 9:59 PM MDT	Severe Thunderstorm Warning	UNR	61 min
May 22, 12:25 AM MDT	Areal Flood Advisory	UNR	10 hr
May 22, 2:09 PM MDT	Mesoscale Discussion	SPC	96 min
May 23, 3:13 PM MDT	Flood Watch	UNR	29 hr
May 23, 3:30 PM MDT	High Wind Watch	UNR	12 hr
May 23, 10:39 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
May 24, 12:15 AM MDT	Areal Flood Advisory	UNR	4 hr
May 24, 3:49 AM MDT	High Wind Warning	UNR	17 hr
May 24, 5:06 AM MDT	Mesoscale Discussion	SPC	114 min
May 24, 11:21 AM MDT	Tornado Watch	SPC	9 hr
May 24, 12:04 PM MDT	Tornado Warning	UNR	56 min
May 24, 12:31 PM MDT	Severe Thunderstorm Warning	UNR	59 min
May 24, 12:35 PM MDT	Severe Thunderstorm Warning	UNR	40 min
May 24, 12:54 PM MDT	Severe Thunderstorm Warning	UNR	51 min
May 24, 1:04 PM MDT	Severe Thunderstorm Warning	UNR	24 min
May 24, 1:05 PM MDT	Areal Flood Advisory	UNR	6 hr
May 24, 1:13 PM MDT	Severe Thunderstorm Warning	UNR	62 min
May 24, 1:20 PM MDT	Severe Thunderstorm Warning	UNR	55 min
May 24, 2:05 PM MDT	Tornado Warning	UNR	40 min
May 24, 2:07 PM MDT	Areal Flood Warning	UNR	6 hr
May 24, 2:17 PM MDT	Severe Thunderstorm Warning	UNR	43 min
May 24, 2:42 PM MDT	Severe Thunderstorm Warning	UNR	63 min
May 24, 3:44 PM MDT	Severe Thunderstorm Warning	UNR	61 min
May 24, 3:56 PM MDT	Flash Flood Warning	UNR	4 hr
May 24, 7:13 PM MDT	Areal Flood Warning	UNR	24 hr
May 26, 3:41 PM MDT	Mesoscale Discussion	SPC	94 min
May 26, 5:03 PM MDT	Tornado Watch	SPC	7 hr
May 26, 8:30 PM MDT	Mesoscale Discussion	SPC	60 min
May 27, 3:10 AM MDT	Wind Advisory	UNR	12 hr
Jun 4, 5:25 PM MDT	Severe Thunderstorm Warning	UNR	50 min
Jun 10, 2:13 AM MDT	Flood Watch	UNR	61 hr
Jun 10, 2:15 PM MDT	Areal Flood Advisory	UNR	4 hr
Jun 13, 2:46 PM MDT	Flood Watch	UNR	9 hr
Jun 13, 4:45 PM MDT	Areal Flood Advisory	UNR	5 hr
Jun 16, 11:19 AM MDT	High Wind Warning	UNR	31 hr
Jun 16, 11:19 AM MDT	Wind Advisory	UNR	31 hr
Jun 16, 3:30 PM MDT	Tornado Watch	SPC	8 hr
Jun 16, 6:01 PM MDT	Mesoscale Discussion	SPC	59 min
Jun 16, 6:02 PM MDT	Areal Flood Advisory	UNR	4 hr
Jun 16, 7:10 PM MDT	Severe Thunderstorm Warning	UNR	65 min
Jun 16, 7:31 PM MDT	Severe Thunderstorm Warning	UNR	59 min
Jun 16, 7:56 PM MDT	Severe Thunderstorm Warning	UNR	50 min
Jun 16, 8:34 PM MDT	Severe Thunderstorm Warning	UNR	41 min
Jun 16, 8:46 PM MDT	Severe Thunderstorm Warning	UNR	74 min
Jun 16, 9:23 PM MDT	Mesoscale Discussion	SPC	67 min
Jun 17, 12:40 AM MDT	Mesoscale Discussion	SPC	95 min
Jun 19, 6:43 PM MDT	Severe Thunderstorm Warning	UNR	62 min
Jun 19, 7:37 PM MDT	Severe Thunderstorm Warning	UNR	53 min
Jun 19, 9:08 PM MDT	Mesoscale Discussion	SPC	67 min
Jun 19, 9:39 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 19, 10:29 PM MDT	Severe Thunderstorm Warning	UNR	61 min
Jun 19, 11:21 PM MDT	Severe Thunderstorm Warning	UNR	54 min
Jun 20, 4:55 AM MDT	Areal Flood Advisory	UNR	6 hr
Jun 20, 6:20 AM MDT	Areal Flood Warning	UNR	12 hr
Jun 20, 12:59 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 1:30 PM MDT	Tornado Watch	SPC	7 hr
Jun 20, 3:23 PM MDT	Flash Flood Watch	UNR	5 hr
Jun 20, 3:36 PM MDT	Severe Thunderstorm Warning	UNR	54 min
Jun 20, 4:06 PM MDT	Severe Thunderstorm Warning	UNR	54 min
Jun 20, 4:23 PM MDT	Mesoscale Discussion	SPC	67 min
Jun 20, 4:44 PM MDT	Severe Thunderstorm Warning	UNR	61 min
Jun 20, 5:26 PM MDT	Severe Thunderstorm Warning	UNR	64 min
Jun 20, 5:40 PM MDT	Areal Flood Advisory	UNR	3 hr
Jun 20, 6:43 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 21, 2:08 PM MDT	Tornado Watch	SPC	7 hr
Jun 21, 6:42 PM MDT	Mesoscale Discussion	SPC	93 min
Jun 21, 7:27 PM MDT	Severe Thunderstorm Warning	UNR	63 min
Jun 21, 8:07 PM MDT	Severe Thunderstorm Warning	UNR	68 min
Jun 21, 8:35 PM MDT	Severe Thunderstorm Warning	UNR	55 min
Jun 21, 8:54 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 21, 9:21 PM MDT	Severe Thunderstorm Warning	UNR	54 min
Jun 21, 9:27 PM MDT	Severe Thunderstorm Warning	UNR	63 min
Jun 21, 9:35 PM MDT	Areal Flood Advisory	UNR	3 hr
Jun 22, 1:18 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 22, 4:03 PM MDT	Tornado Watch	SPC	7 hr
Jun 22, 4:52 PM MDT	Mesoscale Discussion	SPC	83 min
Jun 22, 6:36 PM MDT	Severe Thunderstorm Warning	UNR	84 min
Jun 22, 7:49 PM MDT	Severe Thunderstorm Warning	UNR	86 min
Jun 22, 7:57 PM MDT	Severe Thunderstorm Warning	UNR	93 min
Jun 23, 4:48 AM MDT	Areal Flood Advisory	UNR	8 hr
Jun 23, 12:37 PM MDT	Areal Flood Advisory	UNR	2 hr
Jun 26, 1:24 PM MDT	Mesoscale Discussion	SPC	66 min
Jun 26, 1:56 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 3, 2:02 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 3, 6:06 PM MDT	Mesoscale Discussion	SPC	54 min
Jul 10, 3:31 PM MDT	Severe Thunderstorm Warning	UNR	59 min
Jul 10, 4:17 PM MDT	Mesoscale Discussion	SPC	58 min
Jul 11, 12:37 PM MDT	Severe Thunderstorm Warning	UNR	53 min
Jul 11, 12:47 PM MDT	Mesoscale Discussion	SPC	28 min
Jul 11, 1:03 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 11, 4:26 PM MDT	Mesoscale Discussion	SPC	64 min
Jul 11, 5:15 PM MDT	Areal Flood Advisory	UNR	5 hr
Jul 12, 1:53 PM MDT	Severe Thunderstorm Warning	UNR	67 min
Jul 12, 3:11 PM MDT	Severe Thunderstorm Warning	UNR	33 min
Jul 19, 2:11 PM MDT	Severe Thunderstorm Warning	UNR	64 min
Jul 19, 2:21 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 19, 3:40 PM MDT	Severe Thunderstorm Warning	UNR	50 min
Jul 19, 4:02 PM MDT	Severe Thunderstorm Warning	UNR	73 min
Jul 19, 5:12 PM MDT	Severe Thunderstorm Warning	UNR	63 min
Jul 20, 2:35 PM MDT	Mesoscale Discussion	SPC	55 min
Jul 21, 2:49 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 21, 7:16 PM MDT	Tornado Warning	UNR	29 min
Jul 21, 8:20 PM MDT	Severe Thunderstorm Warning	UNR	55 min
Jul 21, 8:35 PM MDT	Areal Flood Advisory	UNR	3 hr
Jul 29, 2:05 AM MDT	Flash Flood Watch	UNR	19 hr
Jul 29, 1:46 PM MDT	Mesoscale Discussion	SPC	59 min
Jul 29, 2:01 PM MDT	Severe Thunderstorm Warning	UNR	74 min
Jul 29, 2:30 PM MDT	Tornado Watch	SPC	7 hr
Jul 29, 2:53 PM MDT	Severe Thunderstorm Warning	UNR	42 min
Jul 29, 3:16 PM MDT	Areal Flood Advisory	UNR	5 hr
Jul 29, 5:12 PM MDT	Mesoscale Discussion	SPC	93 min
Jul 29, 5:38 PM MDT	Severe Thunderstorm Warning	UNR	53 min
Jul 31, 3:13 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 31, 4:53 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 1, 4:09 PM MDT	Severe Thunderstorm Warning	UNR	44 min
Aug 2, 2:17 PM MDT	Severe Thunderstorm Warning	UNR	32 min
Aug 3, 1:53 AM MDT	Flash Flood Watch	UNR	15 hr
Aug 3, 10:47 AM MDT	Mesoscale Discussion	SPC	58 min
Aug 3, 11:10 AM MDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 3, 1:04 PM MDT	Severe Thunderstorm Warning	UNR	56 min
Aug 3, 1:31 PM MDT	Areal Flood Advisory	UNR	3 hr
Aug 3, 1:58 PM MDT	Severe Thunderstorm Warning	UNR	62 min
Aug 3, 2:02 PM MDT	Mesoscale Discussion	SPC	58 min
Aug 6, 1:16 PM MDT	Mesoscale Discussion	SPC	89 min
Aug 9, 2:15 PM MDT	Severe Thunderstorm Warning	UNR	44 min
Aug 9, 2:39 PM MDT	Areal Flood Advisory	UNR	6 hr
Aug 9, 2:47 PM MDT	Severe Thunderstorm Warning	UNR	17 min
Aug 9, 2:48 PM MDT	Mesoscale Discussion	SPC	87 min
Aug 16, 10:44 AM MDT	Areal Flood Advisory	UNR	4 hr
Aug 16, 1:48 PM MDT	Severe Thunderstorm Warning	UNR	57 min
Sep 1, 2:48 PM MDT	Wind Advisory	UNR	27 hr
Sep 5, 1:48 PM MDT	Wind Advisory	UNR	28 hr
Sep 6, 2:46 PM MDT	Frost Advisory	UNR	14 hr
Sep 9, 7:00 PM MDT	Severe Thunderstorm Warning	UNR	60 min
Sep 9, 7:16 PM MDT	Mesoscale Discussion	SPC	89 min
Sep 9, 7:47 PM MDT	Severe Thunderstorm Warning	UNR	42 min
Oct 12, 2:19 PM MDT	Freeze Warning	UNR	19 hr
Oct 24, 2:57 PM MDT	High Wind Watch	UNR	24 hr
Oct 25, 2:55 PM MDT	High Wind Warning	UNR	51 hr
Nov 21, 1:47 PM MST	Winter Weather Advisory	UNR	21 hr
Nov 22, 1:18 PM MST	Winter Storm Watch	UNR	25 hr
Nov 23, 1:37 PM MST	Winter Weather Advisory	UNR	28 hr
Nov 24, 12:12 PM MST	Wind Chill Advisory	UNR	23 hr
Nov 27, 9:10 PM MST	Winter Weather Advisory	UNR	43 hr
Nov 28, 2:57 PM MST	Wind Advisory	UNR	15 hr
Dec 10, 2:54 PM MST	Wind Advisory	UNR	20 hr
Dec 20, 5:27 AM MST	Freezing Rain Advisory	UNR	4 hr
Dec 22, 9:48 PM MST	Freezing Rain Advisory	UNR	4 hr
Dec 23, 1:52 AM MST	Winter Weather Advisory	UNR	9 hr
Dec 28, 3:03 PM MST	Winter Storm Watch	UNR	23 hr
Dec 29, 2:07 PM MST	Winter Storm Warning	UNR	63 hr
Dec 31, 10:22 AM MST	Mesoscale Discussion	SPC	5 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	57
Tornado Warning	3
Severe Thunderstorm Watch	13
Tornado Watch	8
Mesoscale Discussion	30
Flooding
Areal Flood Warning	3
Flash Flood Warning	1
Flash Flood Watch	3
Flood Watch	4
Areal Flood Advisory	18
Winter
Winter Storm Warning	4
Winter Storm Watch	6
Freezing Rain Advisory	2
Winter Weather Advisory	17
Cold
Freeze Warning	2
Frost Advisory	1
Wind Chill Advisory	3
Wind and dust
High Wind Warning	3
High Wind Watch	3
Wind Advisory	12
Fog and smoke
Dense Fog Advisory	6

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.