Alert archive / South Dakota / Harding County

Weather alerts in Harding County, South Dakota, 2018

169 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Harding County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts: 169
Warnings: 39
Watches: 23
Advisories: 44
Busiest month: June66 alerts
Busiest day: June 10, 201810 alerts

Over time

By month

Warning verification

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

3 of 6 tornado warnings covering Harding County in 2018 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 26 minutes after it went out.

Harding County, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	6	3	50%	3	100%	26 min
Severe thunderstorm warnings	27	18	33%	24	83%	32 min
Flash flood warnings	0			0

Each office's whole area, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Rapid City, SD: tornado warnings	18	6	67%	14	64%	18 min
NWS Rapid City, SD: severe thunderstorm warnings	376	273	27%	586	84%	24 min
NWS Rapid City, SD: flash flood warnings	13	8	38%	16	69%	42 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, 1:31 PM MST	Wind Chill Advisory	UNR	19 hr
Jan 5, 2:36 AM MST	Dense Fog Advisory	UNR	29 hr
Jan 9, 2:23 AM MST	Winter Weather Advisory	UNR	47 hr
Jan 10, 3:31 PM MST	Special Weather Statement	UNR	119 min
Jan 10, 7:26 PM MST	Wind Chill Advisory	UNR	39 hr
Jan 14, 2:47 AM MST	Wind Chill Advisory	UNR	55 hr
Feb 3, 3:52 AM MST	Wind Chill Advisory	UNR	31 hr
Feb 3, 3:52 AM MST	Winter Weather Advisory	UNR	25 hr
Feb 6, 1:58 PM MST	Winter Storm Watch	UNR	25 hr
Feb 7, 2:42 PM MST	Winter Storm Warning	UNR	31 hr
Feb 7, 2:42 PM MST	Winter Weather Advisory	UNR	49 hr
Feb 9, 3:04 PM MST	Wind Chill Advisory	UNR	18 hr
Feb 10, 9:04 AM MST	Wind Chill Advisory	UNR	116 min
Feb 15, 3:03 AM MST	Winter Weather Advisory	UNR	15 hr
Feb 18, 3:00 AM MST	Winter Weather Advisory	UNR	44 hr
Feb 20, 1:45 PM MST	Wind Chill Advisory	UNR	19 hr
Mar 2, 3:19 AM MST	Winter Storm Watch	UNR	48 hr
Mar 3, 1:18 PM MST	Dense Fog Advisory	UNR	22 hr
Mar 4, 3:22 AM MST	Blizzard Warning	UNR	56 hr
Mar 5, 8:11 PM MST	Wind Advisory	UNR	15 hr
Mar 10, 1:44 AM MST	Winter Weather Advisory	UNR	15 hr
Mar 13, 1:52 AM MDT	Dense Fog Advisory	UNR	8 hr
Mar 15, 2:29 PM MDT	Winter Weather Advisory	UNR	30 hr
Mar 18, 3:19 AM MDT	Winter Weather Advisory	UNR	24 hr
Mar 24, 2:33 AM MDT	Winter Storm Watch	UNR	36 hr
Mar 25, 2:41 AM MDT	Winter Weather Advisory	UNR	34 hr
Mar 30, 2:24 PM MDT	Wind Advisory	UNR	14 hr
Apr 1, 2:28 AM MDT	Winter Storm Watch	UNR	25 hr
Apr 2, 3:14 AM MDT	Winter Storm Warning	UNR	27 hr
Apr 10, 2:45 PM MDT	Winter Storm Watch	UNR	44 hr
Apr 12, 3:16 AM MDT	Winter Storm Warning	UNR	35 hr
Apr 12, 1:51 PM MDT	River Flood Warning	UNR	65 hr
Apr 23, 3:39 AM MDT	Winter Weather Advisory	UNR	26 hr
Apr 28, 2:30 AM MDT	Wind Advisory	UNR	18 hr
Apr 29, 5:06 PM MDT	Mesoscale Discussion	SPC	2 hr
May 17, 12:58 PM MDT	Mesoscale Discussion	SPC	92 min
May 17, 1:23 PM MDT	Severe Thunderstorm Watch	SPC	10 hr
May 17, 2:11 PM MDT	Severe Thunderstorm Warning	UNR	64 min
May 17, 4:54 PM MDT	Mesoscale Discussion	SPC	66 min
May 22, 4:56 PM MDT	Mesoscale Discussion	SPC	2 hr
May 23, 1:31 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 23, 5:07 PM MDT	Mesoscale Discussion	SPC	83 min
May 23, 7:24 PM MDT	Special Weather Statement	UNR	36 min
May 26, 4:46 PM MDT	Mesoscale Discussion	SPC	119 min
May 26, 9:13 PM MDT	Mesoscale Discussion	SPC	2 hr
May 31, 1:47 PM MDT	Mesoscale Discussion	SPC	118 min
May 31, 3:55 PM MDT	Mesoscale Discussion	SPC	2 hr
May 31, 9:59 PM MDT	Special Weather Statement	UNR	46 min
May 31, 10:46 PM MDT	Severe Thunderstorm Warning	UNR	48 min
Jun 1, 11:45 AM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 1, 3:04 PM MDT	Mesoscale Discussion	SPC	86 min
Jun 1, 3:04 PM MDT	Severe Thunderstorm Warning	UNR	56 min
Jun 1, 3:32 PM MDT	Tornado Warning	UNR	28 min
Jun 1, 4:00 PM MDT	Special Weather Statement	UNR	30 min
Jun 1, 5:43 PM MDT	Wind Advisory	UNR	3 hr
Jun 2, 2:40 AM MDT	Wind Advisory	UNR	15 hr
Jun 5, 5:54 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 5, 6:26 PM MDT	Special Weather Statement	UNR	49 min
Jun 5, 7:02 PM MDT	Severe Thunderstorm Warning	UNR	58 min
Jun 5, 7:22 PM MDT	Severe Thunderstorm Warning	UNR	38 min
Jun 5, 7:53 PM MDT	Severe Thunderstorm Warning	UNR	11 min
Jun 7, 1:51 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 7, 3:49 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 7, 8:35 PM MDT	Severe Thunderstorm Warning	UNR	55 min
Jun 7, 9:04 PM MDT	Mesoscale Discussion	SPC	86 min
Jun 7, 9:22 PM MDT	Severe Thunderstorm Warning	UNR	53 min
Jun 8, 1:39 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 8, 4:43 PM MDT	Special Weather Statement	UNR	47 min
Jun 8, 5:41 PM MDT	Special Weather Statement	UNR	49 min
Jun 9, 6:35 PM MDT	Mesoscale Discussion	SPC	85 min
Jun 9, 7:47 PM MDT	Severe Thunderstorm Warning	UNR	58 min
Jun 9, 8:55 PM MDT	Special Weather Statement	UNR	35 min
Jun 10, 1:15 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 2:52 PM MDT	Tornado Watch	SPC	7 hr
Jun 10, 4:33 PM MDT	Severe Thunderstorm Warning	UNR	57 min
Jun 10, 5:02 PM MDT	Severe Thunderstorm Warning	UNR	43 min
Jun 10, 5:06 PM MDT	Tornado Warning	UNR	39 min
Jun 10, 5:36 PM MDT	Mesoscale Discussion	SPC	114 min
Jun 10, 5:43 PM MDT	Tornado Warning	UNR	36 min
Jun 10, 7:52 PM MDT	Mesoscale Discussion	SPC	113 min
Jun 14, 1:58 PM MDT	Mesoscale Discussion	SPC	62 min
Jun 14, 2:26 PM MDT	Special Weather Statement	UNR	49 min
Jun 14, 2:40 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 14, 4:06 PM MDT	Severe Thunderstorm Warning	UNR	54 min
Jun 14, 4:59 PM MDT	Severe Thunderstorm Warning	UNR	20 min
Jun 14, 5:01 PM MDT	Severe Thunderstorm Warning	UNR	44 min
Jun 14, 5:06 PM MDT	Special Weather Statement	UNR	39 min
Jun 14, 5:15 PM MDT	Mesoscale Discussion	SPC	90 min
Jun 14, 6:00 PM MDT	Special Weather Statement	UNR	45 min
Jun 15, 7:55 PM MDT	Special Weather Statement	UNR	50 min
Jun 22, 12:56 PM MDT	Mesoscale Discussion	SPC	94 min
Jun 22, 3:15 PM MDT	Special Weather Statement	UNR	45 min
Jun 22, 3:39 PM MDT	Severe Thunderstorm Warning	UNR	46 min
Jun 26, 2:35 PM MDT	Mesoscale Discussion	SPC	85 min
Jun 26, 3:00 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 26, 5:46 PM MDT	Mesoscale Discussion	SPC	59 min
Jun 26, 8:05 PM MDT	Mesoscale Discussion	SPC	115 min
Jun 26, 10:31 PM MDT	Severe Thunderstorm Warning	UNR	59 min
Jun 26, 10:56 PM MDT	Severe Thunderstorm Warning	UNR	45 min
Jun 26, 11:12 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 26, 11:38 PM MDT	Severe Thunderstorm Warning	UNR	67 min
Jun 27, 12:20 AM MDT	Severe Thunderstorm Warning	UNR	55 min
Jun 27, 1:18 AM MDT	Mesoscale Discussion	SPC	87 min
Jun 28, 3:42 PM MDT	Tornado Watch	SPC	7 hr
Jun 28, 5:59 PM MDT	Mesoscale Discussion	SPC	91 min
Jun 28, 8:01 PM MDT	Tornado Warning Tornado observed	UNR	44 min
Jun 28, 8:06 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 28, 8:39 PM MDT	Tornado Warning Tornado observed	UNR	51 min
Jun 28, 9:21 PM MDT	Tornado Warning Tornado observed	UNR	8 min
Jun 28, 9:29 PM MDT	Severe Thunderstorm Warning	UNR	61 min
Jun 28, 10:13 PM MDT	Severe Thunderstorm Warning	UNR	50 min
Jun 29, 1:06 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 29, 2:29 PM MDT	Mesoscale Discussion	SPC	91 min
Jul 2, 4:23 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 6:36 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 2, 8:50 PM MDT	Mesoscale Discussion	SPC	115 min
Jul 2, 11:01 PM MDT	Mesoscale Discussion	SPC	89 min
Jul 3, 12:59 AM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 3, 1:02 AM MDT	Severe Thunderstorm Warning	UNR	58 min
Jul 3, 1:46 AM MDT	Severe Thunderstorm Warning	UNR	59 min
Jul 3, 4:42 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 3, 8:04 PM MDT	Special Weather Statement	UNR	26 min
Jul 3, 8:30 PM MDT	Special Weather Statement	UNR	30 min
Jul 3, 8:38 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 8:50 PM MDT	Severe Thunderstorm Warning	UNR	25 min
Jul 6, 8:05 AM MDT	Special Weather Statement	UNR	25 min
Jul 7, 7:55 PM MDT	Mesoscale Discussion	SPC	65 min
Jul 7, 8:41 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 7, 8:45 PM MDT	Special Weather Statement	UNR	30 min
Jul 7, 9:16 PM MDT	Special Weather Statement	UNR	29 min
Jul 7, 9:58 PM MDT	Severe Thunderstorm Warning	UNR	77 min
Jul 14, 3:56 PM MDT	Special Weather Statement	UNR	49 min
Jul 14, 4:32 PM MDT	Special Weather Statement	UNR	43 min
Jul 14, 4:57 PM MDT	Special Weather Statement	UNR	18 min
Jul 14, 5:15 PM MDT	Special Weather Statement	UNR	45 min
Jul 21, 1:53 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 21, 4:11 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 21, 5:18 PM MDT	Mesoscale Discussion	SPC	87 min
Jul 21, 8:40 PM MDT	Mesoscale Discussion	SPC	65 min
Jul 24, 4:51 PM MDT	Special Weather Statement	UNR	24 min
Jul 24, 6:25 PM MDT	Special Weather Statement	UNR	50 min
Aug 3, 8:47 PM MDT	Severe Thunderstorm Warning	UNR	58 min
Aug 3, 9:41 PM MDT	Severe Thunderstorm Warning	UNR	64 min
Aug 18, 1:45 PM MDT	Mesoscale Discussion	SPC	3 hr
Aug 23, 4:30 PM MDT	Special Weather Statement	UNR	45 min
Aug 23, 6:28 PM MDT	Special Weather Statement	UNR	47 min
Sep 6, 6:40 PM MDT	Special Weather Statement	UNR	35 min
Sep 25, 2:21 AM MDT	Wind Advisory	UNR	16 hr
Sep 25, 1:32 PM MDT	Frost Advisory	UNR	18 hr
Sep 27, 1:52 PM MDT	Frost Advisory	UNR	19 hr
Oct 3, 3:29 AM MDT	Freeze Watch	UNR	11 hr
Oct 3, 3:29 AM MDT	Wind Advisory	UNR	15 hr
Oct 3, 2:18 PM MDT	Freeze Warning	UNR	18 hr
Oct 6, 2:28 PM MDT	Winter Weather Advisory	UNR	61 hr
Oct 27, 2:26 AM MDT	Wind Advisory	UNR	16 hr
Oct 31, 2:31 PM MDT	Wind Advisory	UNR	28 hr
Nov 2, 2:39 PM MDT	Wind Advisory	UNR	23 hr
Nov 5, 8:17 AM MST	Wind Advisory	UNR	7 hr
Nov 6, 2:40 AM MST	Wind Advisory	UNR	13 hr
Nov 10, 2:31 AM MST	Wind Advisory	UNR	12 hr
Nov 15, 2:22 AM MST	Wind Advisory	UNR	13 hr
Nov 16, 2:23 AM MST	Wind Advisory	UNR	17 hr
Nov 30, 3:24 AM MST	Winter Weather Advisory	UNR	48 hr
Dec 12, 2:44 AM MST	Wind Advisory	UNR	18 hr
Dec 18, 2:36 AM MST	High Wind Watch	UNR	12 hr
Dec 18, 2:18 PM MST	Wind Advisory	UNR	27 hr
Dec 22, 2:43 AM MST	Wind Advisory	UNR	14 hr
Dec 25, 2:50 AM MST	Winter Weather Advisory	UNR	3 days
Dec 29, 2:19 PM MST	Winter Weather Advisory	UNR	51 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	6
Severe Thunderstorm Watch	14
Tornado Watch	2
Mesoscale Discussion	36
Special Weather Statement	27
Flooding
River Flood Warning	1
Winter
Blizzard Warning	1
Winter Storm Warning	3
Winter Storm Watch	5
Winter Weather Advisory	14
Cold
Freeze Warning	1
Freeze Watch	1
Frost Advisory	2
Wind Chill Advisory	7
Wind and dust
High Wind Watch	1
Wind Advisory	18
Fog and smoke
Dense Fog Advisory	3

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2017 2019

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.