Alert archive / South Dakota / Sully County

Weather alerts in Sully County, South Dakota, 2008

138 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Sully County and its neighbors

Each county as a circle sized by its count in 2008. Tap one for its archive.

Alerts: 138
Warnings: 39
Watches: 27
Advisories: 34
Busiest month: June35 alerts
Busiest day: June 27, 20089 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 2 tornado warnings covering Sully County in 2008 had a tornado report inside them.

Sully County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	0
Severe thunderstorm warnings	27	18	33%	13	38%	10 min
Flash flood warnings	0			0

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Aberdeen, SD: tornado warnings	29	7	76%	14	71%	14 min
NWS Aberdeen, SD: severe thunderstorm warnings	259	122	53%	247	79%	22 min
NWS Aberdeen, SD: flash flood warnings	9	4	56%	6	67%	41 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 21, 2:33 PM CST	Wind Chill Advisory	ABR	20 hr
Jan 22, 3:35 PM CST	Blowing Snow Advisory	ABR	20 hr
Jan 28, 3:45 AM CST	Winter Weather Advisory	ABR	24 hr
Jan 28, 3:26 PM CST	Wind Chill Advisory	ABR	45 hr
Feb 4, 10:24 AM CST	Winter Weather Advisory	ABR	5 hr
Feb 8, 3:43 PM CST	Wind Chill Advisory	ABR	47 hr
Feb 10, 2:51 PM CST	Winter Weather Advisory	ABR	20 hr
Feb 11, 7:07 AM CST	Mesoscale Discussion	SPC	3 hr
Feb 11, 10:56 AM CST	Snow Advisory	ABR	7 hr
Feb 17, 2:17 PM CST	Wind Advisory	ABR	5 hr
Mar 2, 3:30 AM CST	Wind Advisory	ABR	18 hr
Mar 25, 3:39 PM CDT	Winter Storm Watch	ABR	45 hr
Mar 29, 4:14 AM CDT	Wind Advisory	ABR	16 hr
Mar 29, 3:41 PM CDT	Winter Storm Watch	ABR	23 hr
Mar 30, 2:55 PM CDT	Heavy Snow Warning	ABR	24 hr
Mar 30, 2:55 PM CDT	Snow Advisory	ABR	24 hr
Apr 5, 11:44 PM CDT	Winter Weather Advisory	ABR	21 hr
Apr 8, 3:42 PM CDT	Winter Storm Watch	ABR	36 hr
Apr 10, 3:49 AM CDT	Blizzard Warning	ABR	35 hr
Apr 11, 3:59 AM CDT	Winter Weather Advisory	ABR	9 hr
Apr 14, 3:48 PM CDT	Wind Advisory	ABR	29 hr
Apr 20, 4:20 AM CDT	Wind Advisory	ABR	15 hr
Apr 23, 5:38 PM CDT	Mesoscale Discussion	SPC	3 hr
May 2, 4:23 AM CDT	Wind Advisory	ABR	19 hr
May 10, 4:10 AM CDT	Wind Advisory	ABR	15 hr
May 19, 11:44 AM CDT	Wind Advisory	ABR	9 hr
May 24, 2:39 PM CDT	Tornado Watch	SPC	7 hr
May 24, 6:07 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 2, 7:11 PM CDT	Mesoscale Discussion	SPC	34 min
Jun 2, 8:41 PM CDT	Severe Thunderstorm Warning	ABR	49 min
Jun 2, 9:28 PM CDT	Severe Thunderstorm Warning	ABR	32 min
Jun 2, 10:02 PM CDT	Mesoscale Discussion	SPC	118 min
Jun 3, 2:53 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 4, 3:43 PM CDT	Flood Watch	ABR	20 hr
Jun 5, 10:11 AM CDT	Mesoscale Discussion	SPC	94 min
Jun 5, 11:06 AM CDT	Areal Flood Warning	ABR	23 hr
Jun 8, 2:53 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 8:06 PM CDT	Tornado Watch	SPC	5 hr
Jun 10, 10:51 PM CDT	Mesoscale Discussion	SPC	54 min
Jun 11, 12:39 AM CDT	Mesoscale Discussion	SPC	36 min
Jun 11, 12:55 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 11, 3:19 AM CDT	Mesoscale Discussion	SPC	116 min
Jun 18, 2:19 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 18, 6:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 21, 5:03 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 21, 5:07 PM CDT	Severe Thunderstorm Warning	ABR	34 min
Jun 24, 7:52 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 24, 10:00 PM CDT	Severe Thunderstorm Warning	ABR	60 min
Jun 24, 10:58 PM CDT	Severe Thunderstorm Warning	ABR	34 min
Jun 26, 12:13 AM CDT	Severe Thunderstorm Warning	ABR	32 min
Jun 26, 12:46 AM CDT	Severe Thunderstorm Warning	ABR	12 min
Jun 26, 12:50 AM CDT	Severe Thunderstorm Warning	ABR	25 min
Jun 26, 6:28 PM CDT	Mesoscale Discussion	SPC	62 min
Jun 26, 7:14 PM CDT	Tornado Watch	SPC	7 hr
Jun 26, 9:21 PM CDT	Severe Thunderstorm Warning	ABR	54 min
Jun 26, 9:25 PM CDT	Tornado Warning	ABR	50 min
Jun 26, 9:28 PM CDT	Severe Thunderstorm Warning	ABR	62 min
Jun 26, 10:14 PM CDT	Tornado Warning	ABR	46 min
Jun 26, 10:27 PM CDT	Severe Thunderstorm Warning	ABR	63 min
Jun 26, 10:38 PM CDT	Severe Thunderstorm Warning	ABR	52 min
Jun 26, 10:59 PM CDT	Severe Thunderstorm Warning	ABR	46 min
Jun 27, 2:03 AM CDT	Mesoscale Discussion	SPC	57 min
Jun 28, 4:13 AM CDT	Wind Advisory	ABR	16 hr
Jul 5, 3:34 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 11, 4:32 AM CDT	Wind Advisory	ABR	16 hr
Jul 16, 4:50 PM CDT	Mesoscale Discussion	SPC	115 min
Jul 16, 7:50 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 16, 7:54 PM CDT	Severe Thunderstorm Warning	ABR	51 min
Jul 16, 8:49 PM CDT	Severe Thunderstorm Warning	ABR	41 min
Jul 16, 11:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 17, 3:12 AM CDT	Severe Thunderstorm Warning	ABR	48 min
Jul 18, 8:45 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 18, 9:58 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 18, 10:23 PM CDT	Severe Thunderstorm Warning	ABR	67 min
Jul 18, 11:05 PM CDT	Severe Thunderstorm Warning	ABR	55 min
Jul 18, 11:47 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 18, 11:54 PM CDT	Severe Thunderstorm Warning	ABR	51 min
Jul 19, 12:41 AM CDT	Severe Thunderstorm Warning	ABR	64 min
Jul 19, 12:48 AM CDT	Areal Flood Advisory	ABR	6 hr
Jul 23, 6:24 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 23, 6:51 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jul 24, 7:36 PM CDT	Mesoscale Discussion	SPC	54 min
Jul 25, 2:17 AM CDT	Severe Thunderstorm Warning	ABR	43 min
Jul 26, 8:51 PM CDT	Mesoscale Discussion	SPC	84 min
Jul 26, 9:02 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 26, 10:10 PM CDT	Severe Thunderstorm Warning	ABR	65 min
Jul 26, 11:09 PM CDT	Severe Thunderstorm Warning	ABR	66 min
Jul 26, 11:15 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 26, 11:56 PM CDT	Severe Thunderstorm Warning	ABR	64 min
Jul 27, 2:25 AM CDT	Mesoscale Discussion	SPC	95 min
Jul 27, 3:14 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 28, 6:20 PM CDT	Tornado Watch	SPC	4 hr
Jul 28, 8:47 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 30, 7:04 PM CDT	Mesoscale Discussion	SPC	56 min
Jul 31, 12:50 AM CDT	Mesoscale Discussion	SPC	85 min
Aug 11, 4:30 AM CDT	Flash Flood Watch	ABR	19 hr
Aug 11, 1:56 PM CDT	Mesoscale Discussion	SPC	94 min
Aug 11, 2:58 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 20, 4:06 AM CDT	Wind Advisory	ABR	15 hr
Aug 22, 3:33 AM CDT	Wind Advisory	ABR	17 hr
Aug 26, 4:56 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 26, 7:25 PM CDT	Mesoscale Discussion	SPC	95 min
Aug 26, 8:33 PM CDT	Severe Thunderstorm Warning	ABR	57 min
Aug 26, 9:29 PM CDT	Severe Thunderstorm Warning	ABR	24 min
Aug 31, 3:36 AM CDT	Wind Advisory	ABR	17 hr
Sep 22, 5:21 PM CDT	Mesoscale Discussion	SPC	84 min
Sep 22, 5:57 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 22, 8:27 PM CDT	Mesoscale Discussion	SPC	93 min
Sep 22, 10:21 PM CDT	Severe Thunderstorm Warning	ABR	39 min
Sep 28, 3:34 PM CDT	Mesoscale Discussion	SPC	116 min
Oct 4, 2:56 AM CDT	Wind Advisory	ABR	19 hr
Oct 8, 7:46 PM CDT	Freeze Warning	ABR	9 hr
Oct 13, 3:03 PM CDT	Freeze Warning	ABR	18 hr
Oct 25, 11:48 AM CDT	High Wind Watch	ABR	16 hr
Oct 26, 3:51 AM CDT	High Wind Warning	ABR	15 hr
Nov 4, 4:35 AM CST	Winter Storm Watch	ABR	11 hr
Nov 4, 4:04 PM CST	Blizzard Watch	ABR	21 hr
Nov 5, 4:48 AM CST	Blizzard Warning	ABR	55 hr
Nov 5, 2:51 PM CST	Mesoscale Discussion	SPC	114 min
Nov 6, 4:48 AM CST	Winter Weather Advisory	ABR	10 hr
Nov 6, 12:38 PM CST	Mesoscale Discussion	SPC	4 hr
Nov 6, 6:32 PM CST	Mesoscale Discussion	SPC	4 hr
Nov 10, 3:00 PM CST	Winter Weather Advisory	ABR	24 hr
Nov 13, 2:45 PM CST	Wind Advisory	ABR	27 hr
Nov 14, 2:17 PM CST	Mesoscale Discussion	SPC	58 min
Dec 2, 9:32 AM CST	Winter Weather Advisory	ABR	14 hr
Dec 2, 12:29 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 8, 4:10 AM CST	Winter Weather Advisory	ABR	17 hr
Dec 8, 6:22 AM CST	Mesoscale Discussion	SPC	4 hr
Dec 12, 3:49 AM CST	Blizzard Watch	ABR	24 hr
Dec 13, 3:36 AM CST	Blizzard Warning	ABR	47 hr
Dec 14, 12:07 AM CST	Mesoscale Discussion	SPC	4 hr
Dec 14, 3:33 PM CST	Wind Chill Warning	ABR	23 hr
Dec 18, 2:22 PM CST	Blizzard Watch	ABR	14 hr
Dec 19, 4:49 AM CST	Winter Weather Advisory	ABR	31 hr
Dec 20, 11:50 AM CST	Wind Chill Warning	ABR	28 hr
Dec 22, 3:52 AM CST	Wind Chill Advisory	ABR	6 hr
Dec 29, 3:40 PM CST	Wind Advisory	ABR	19 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	2
Severe Thunderstorm Watch	13
Tornado Watch	4
Mesoscale Discussion	38
Flooding
Areal Flood Warning	1
Flash Flood Watch	1
Flood Watch	1
Areal Flood Advisory	1
Winter
Blizzard Warning	3
Heavy Snow Warning	1
Blizzard Watch	3
Winter Storm Watch	4
Blowing Snow Advisory	1
Snow Advisory	2
Winter Weather Advisory	10
Cold
Freeze Warning	2
Wind Chill Warning	2
Wind Chill Advisory	4
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	16

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2007 2009

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.