Alert archive / South Dakota / Todd County

Weather alerts in Todd 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.

Todd County and its neighbors

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

Alerts: 152
Warnings: 43
Watches: 21
Advisories: 25
Busiest month: July36 alerts
Busiest day: July 27, 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.

1 of 3 tornado warnings covering Todd County in 2016 had a tornado report inside them; 2 of 3 tornado reports fell inside a warning, on average 5 minutes after it went out.

Todd County, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	1	67%	3	67%	5 min
Severe thunderstorm warnings	27	21	22%	17	94%	27 min
Flash flood warnings	2	2	0%	1	100%	30 min

Each office's whole area, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Rapid City, SD: tornado warnings	11	3	73%	10	50%	4 min
NWS Rapid City, SD: severe thunderstorm warnings	391	279	29%	553	87%	24 min
NWS Rapid City, SD: flash flood warnings	6	5	17%	7	100%	88 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 16, 4:25 AM CST	Wind Chill Advisory	UNR	32 hr
Jan 19, 7:33 PM CST	Dense Fog Advisory	UNR	8 hr
Jan 24, 3:31 AM CST	Winter Weather Advisory	UNR	35 hr
Feb 5, 3:48 AM CST	High Wind Watch	UNR	23 hr
Feb 5, 2:52 PM CST	High Wind Warning	UNR	54 hr
Feb 17, 3:02 PM CST	High Wind Warning	UNR	49 hr
Feb 18, 5:13 AM CST	High Wind Watch	UNR	10 hr
Feb 23, 8:38 PM CST	Wind Advisory	UNR	21 hr
Feb 29, 1:06 PM CST	Mesoscale Discussion	SPC	24 min
Mar 21, 4:23 PM CDT	Winter Weather Advisory	UNR	51 hr
Mar 30, 3:31 PM CDT	Wind Advisory	UNR	29 hr
Apr 5, 4:40 AM CDT	High Wind Warning	UNR	26 hr
Apr 6, 3:59 AM CDT	Wind Advisory	UNR	16 hr
Apr 6, 3:45 PM CDT	Wind Advisory	UNR	28 hr
Apr 14, 3:42 PM CDT	Wind Advisory	UNR	15 hr
Apr 16, 3:30 PM CDT	Flood Watch	UNR	37 hr
Apr 29, 4:04 PM CDT	Winter Weather Advisory	UNR	17 hr
May 6, 9:47 PM CDT	Special Weather Statement	UNR	43 min
May 13, 3:46 AM CDT	Freeze Warning	UNR	29 hr
May 14, 3:40 PM CDT	Frost Advisory	UNR	12 hr
May 22, 2:54 PM CDT	Mesoscale Discussion	SPC	96 min
May 22, 3:20 PM CDT	Tornado Watch	SPC	7 hr
May 22, 3:52 PM CDT	Severe Thunderstorm Warning	UNR	53 min
May 22, 4:32 PM CDT	Severe Thunderstorm Warning	UNR	58 min
May 22, 5:02 PM CDT	Severe Thunderstorm Warning	UNR	58 min
May 22, 5:55 PM CDT	Severe Thunderstorm Warning	UNR	65 min
May 22, 6:30 PM CDT	Tornado Warning Tornado observed	UNR	45 min
May 22, 6:35 PM CDT	Mesoscale Discussion	SPC	115 min
May 22, 7:13 PM CDT	Tornado Warning	UNR	16 min
May 22, 7:16 PM CDT	Severe Thunderstorm Warning	UNR	59 min
May 22, 8:13 PM CDT	Flash Flood Warning	UNR	3 hr
May 22, 9:28 PM CDT	Severe Thunderstorm Warning	UNR	62 min
May 22, 9:59 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 22, 11:05 PM CDT	Areal Flood Warning	UNR	12 hr
May 24, 9:02 PM CDT	Mesoscale Discussion	SPC	58 min
May 24, 11:19 PM CDT	Special Weather Statement	UNR	26 min
May 25, 2:52 PM CDT	Mesoscale Discussion	SPC	53 min
May 25, 4:46 PM CDT	Special Weather Statement	UNR	29 min
May 25, 4:59 PM CDT	Special Weather Statement	LBF	46 min
May 26, 7:47 PM CDT	Special Weather Statement	UNR	28 min
May 26, 8:35 PM CDT	Special Weather Statement	UNR	25 min
May 26, 9:06 PM CDT	Special Weather Statement	UNR	24 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
Jun 9, 3:14 PM CDT	Heat Advisory	UNR	55 hr
Jun 13, 1:45 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 13, 7:00 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 13, 7:46 PM CDT	Severe Thunderstorm Warning	UNR	59 min
Jun 13, 8:02 PM CDT	Tornado Warning	UNR	28 min
Jun 13, 8:30 PM CDT	Mesoscale Discussion	SPC	60 min
Jun 13, 8:38 PM CDT	Severe Thunderstorm Warning	UNR	82 min
Jun 14, 3:31 PM CDT	Mesoscale Discussion	SPC	119 min
Jun 14, 3:44 PM CDT	Special Weather Statement	LBF	46 min
Jun 21, 9:29 PM CDT	Severe Thunderstorm Warning	UNR	37 min
Jun 24, 8:17 PM CDT	Severe Thunderstorm Warning	UNR	43 min
Jun 28, 2:37 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 28, 7:57 PM CDT	Special Weather Statement	LBF	33 min
Jun 28, 8:26 PM CDT	Special Weather Statement	LBF	34 min
Jun 29, 3:43 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 29, 7:32 PM CDT	Mesoscale Discussion	SPC	118 min
Jun 29, 7:44 PM CDT	Severe Thunderstorm Warning	UNR	61 min
Jun 29, 8:38 PM CDT	Severe Thunderstorm Warning	UNR	67 min
Jul 6, 3:21 PM CDT	Tornado Watch	SPC	7 hr
Jul 6, 6:48 PM CDT	Mesoscale Discussion	SPC	57 min
Jul 9, 3:11 PM CDT	Heat Advisory	UNR	28 hr
Jul 10, 3:06 PM CDT	Mesoscale Discussion	SPC	84 min
Jul 10, 7:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 15, 3:11 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 16, 3:33 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 16, 5:09 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 16, 7:07 PM CDT	Mesoscale Discussion	SPC	83 min
Jul 18, 2:37 PM CDT	Excessive Heat Watch	UNR	14 hr
Jul 19, 4:24 AM CDT	Excessive Heat Warning	UNR	4 days
Jul 26, 12:09 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 26, 5:32 PM CDT	Mesoscale Discussion	SPC	118 min
Jul 26, 6:05 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 26, 6:15 PM CDT	Severe Thunderstorm Warning	UNR	60 min
Jul 26, 7:00 PM CDT	Flash Flood Warning	UNR	6 hr
Jul 26, 7:13 PM CDT	Severe Thunderstorm Warning	UNR	62 min
Jul 26, 7:54 PM CDT	Severe Thunderstorm Warning	UNR	66 min
Jul 26, 8:34 PM CDT	Severe Thunderstorm Warning	UNR	56 min
Jul 26, 8:58 PM CDT	Mesoscale Discussion	SPC	62 min
Jul 27, 2:59 PM CDT	Special Weather Statement	UNR	46 min
Jul 27, 3:11 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 27, 3:40 PM CDT	Special Weather Statement	LBF	65 min
Jul 27, 4:38 PM CDT	Special Weather Statement	UNR	52 min
Jul 27, 5:31 PM CDT	Special Weather Statement	UNR	59 min
Jul 27, 6:33 PM CDT	Special Weather Statement	UNR	57 min
Jul 28, 7:32 PM CDT	Special Weather Statement	UNR	28 min
Jul 29, 11:59 PM CDT	Special Weather Statement	UNR	31 min
Jul 30, 1:10 AM CDT	Special Weather Statement	UNR	50 min
Jul 30, 6:44 PM CDT	Severe Thunderstorm Warning	UNR	76 min
Jul 30, 7:28 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 30, 9:32 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 30, 10:57 PM CDT	Severe Thunderstorm Warning	UNR	78 min
Jul 30, 11:03 PM CDT	Mesoscale Discussion	SPC	117 min
Jul 31, 12:07 AM CDT	Severe Thunderstorm Warning	UNR	53 min
Jul 31, 5:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 31, 8:46 PM CDT	Mesoscale Discussion	SPC	89 min
Aug 3, 6:40 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 8, 7:56 PM CDT	Mesoscale Discussion	SPC	94 min
Aug 8, 10:05 PM CDT	Special Weather Statement	UNR	55 min
Aug 10, 4:11 AM CDT	Heat Advisory	UNR	16 hr
Aug 10, 3:49 PM CDT	Mesoscale Discussion	SPC	56 min
Aug 10, 7:43 PM CDT	Severe Thunderstorm Warning	UNR	47 min
Aug 10, 8:24 PM CDT	Severe Thunderstorm Warning	UNR	66 min
Aug 10, 9:15 PM CDT	Severe Thunderstorm Warning	UNR	49 min
Aug 10, 9:45 PM CDT	Special Weather Statement	LBF	45 min
Aug 11, 5:56 PM CDT	Mesoscale Discussion	SPC	94 min
Aug 11, 6:29 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 11, 8:24 PM CDT	Special Weather Statement	UNR	66 min
Aug 14, 5:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 14, 6:15 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 14, 9:04 PM CDT	Mesoscale Discussion	SPC	56 min
Aug 18, 6:20 PM CDT	Special Weather Statement	LBF	25 min
Aug 18, 8:13 PM CDT	Special Weather Statement	UNR	47 min
Aug 18, 9:36 PM CDT	Mesoscale Discussion	SPC	84 min
Sep 2, 3:57 AM CDT	Wind Advisory	UNR	15 hr
Sep 4, 2:46 PM CDT	Mesoscale Discussion	SPC	119 min
Sep 4, 3:24 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 4, 5:56 PM CDT	Severe Thunderstorm Warning	UNR	64 min
Sep 4, 7:31 PM CDT	Severe Thunderstorm Warning	UNR	74 min
Sep 4, 8:28 PM CDT	Severe Thunderstorm Warning	UNR	77 min
Sep 4, 8:57 PM CDT	Mesoscale Discussion	SPC	93 min
Sep 6, 1:12 AM CDT	Special Weather Statement	LBF	33 min
Sep 8, 7:18 PM CDT	Special Weather Statement	UNR	57 min
Sep 8, 7:54 PM CDT	Severe Thunderstorm Warning	UNR	66 min
Sep 8, 7:58 PM CDT	Special Weather Statement	LBF	47 min
Sep 23, 2:39 PM CDT	Wind Advisory	UNR	50 hr
Oct 3, 3:45 AM CDT	Wind Advisory	UNR	15 hr
Oct 3, 2:04 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Oct 3, 5:54 PM CDT	Mesoscale Discussion	SPC	2 hr
Oct 3, 6:40 PM CDT	Severe Thunderstorm Warning	UNR	53 min
Oct 3, 7:41 PM CDT	Special Weather Statement	UNR	49 min
Oct 6, 3:54 PM CDT	Freeze Warning	UNR	18 hr
Oct 16, 3:08 PM CDT	Wind Advisory	UNR	28 hr
Oct 31, 3:57 AM CDT	Wind Advisory	UNR	15 hr
Nov 15, 3:01 PM CST	Winter Storm Watch	UNR	37 hr
Nov 16, 3:45 PM CST	Winter Storm Warning	UNR	42 hr
Nov 28, 3:14 AM CST	Winter Weather Advisory	UNR	57 hr
Dec 7, 3:41 PM CST	Wind Chill Advisory	UNR	20 hr
Dec 13, 3:02 PM CST	Winter Storm Watch	UNR	47 hr
Dec 15, 3:49 AM CST	Winter Storm Warning	UNR	47 hr
Dec 16, 10:07 AM CST	Mesoscale Discussion	SPC	6 hr
Dec 17, 2:42 AM CST	Wind Chill Warning	UNR	33 hr
Dec 20, 3:38 PM CST	Wind Advisory	UNR	23 hr
Dec 21, 2:54 PM CST	Winter Storm Watch	UNR	62 hr
Dec 24, 4:55 AM CST	Winter Weather Advisory	UNR	55 hr
Dec 25, 3:27 PM CST	Wind Advisory	UNR	5 hr
Dec 25, 8:47 PM CST	High Wind Warning	UNR	9 hr
Dec 26, 5:52 AM CST	Wind Advisory	UNR	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	27
Tornado Warning	3
Severe Thunderstorm Watch	12
Tornado Watch	2
Mesoscale Discussion	36
Special Weather Statement	27
Flooding
Areal Flood Warning	1
Flash Flood Warning	2
Flood Watch	1
Winter
Winter Storm Warning	2
Winter Storm Watch	3
Winter Weather Advisory	5
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	3
Cold
Freeze Warning	2
Wind Chill Warning	1
Frost Advisory	1
Wind Chill Advisory	2
Wind and dust
High Wind Warning	4
High Wind Watch	2
Wind Advisory	13
Fog and smoke
Dense 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 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.