Alert archive / South Dakota / Fall River County

Weather alerts in Fall River County, South Dakota, 2019

218 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Fall River County and its neighbors

Each county as a circle sized by its count in 2019. Tap one for its archive.

Alerts: 218
Warnings: 60
Watches: 33
Advisories: 25
Busiest month: July69 alerts
Busiest day: July 4, 201913 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 Fall River County in 2019 had a tornado report inside them.

Fall River County, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	0	100%	0
Severe thunderstorm warnings	39	24	38%	29	90%	24 min
Flash flood warnings	2	0	100%	0

Each office's whole area, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Rapid City, SD: tornado warnings	24	7	71%	13	77%	11 min
NWS Rapid City, SD: severe thunderstorm warnings	444	289	35%	588	87%	24 min
NWS Rapid City, SD: flash flood warnings	24	12	50%	28	86%	94 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 12, 12:10 AM MST	Dense Fog Advisory	UNR	11 hr
Jan 15, 8:43 PM MST	Dense Fog Advisory	UNR	9 hr
Jan 20, 1:40 PM MST	Winter Weather Advisory	UNR	38 hr
Jan 25, 3:12 AM MST	High Wind Watch	UNR	47 hr
Jan 27, 2:41 AM MST	High Wind Warning	UNR	32 hr
Feb 5, 2:23 PM MST	Wind Chill Advisory	UNR	4 days
Feb 5, 2:23 PM MST	Winter Weather Advisory	UNR	35 hr
Feb 14, 2:14 PM MST	Winter Weather Advisory	UNR	24 hr
Mar 1, 2:05 PM MST	Winter Weather Advisory	UNR	22 hr
Mar 2, 3:14 AM MST	Wind Chill Warning	UNR	56 hr
Mar 2, 3:14 AM MST	Wind Chill Advisory	UNR	35 hr
Mar 4, 3:48 AM MST	Wind Chill Advisory	UNR	7 hr
Mar 5, 2:10 PM MST	Winter Storm Watch	UNR	12 hr
Mar 6, 2:13 AM MST	Winter Storm Warning	UNR	27 hr
Mar 11, 2:48 AM MDT	Winter Storm Watch	UNR	36 hr
Mar 12, 3:09 AM MDT	Blizzard Warning	UNR	63 hr
Mar 12, 3:09 AM MDT	Winter Storm Warning	UNR	55 hr
Mar 13, 3:59 AM MDT	Mesoscale Discussion	SPC	4 hr
Mar 13, 6:20 AM MDT	Mesoscale Discussion	SPC	4 hr
Mar 13, 10:27 AM MDT	Mesoscale Discussion	SPC	3 hr
Mar 13, 1:37 PM MDT	Mesoscale Discussion	SPC	4 hr
Mar 13, 5:26 PM MDT	Mesoscale Discussion	SPC	6 hr
Mar 14, 2:35 AM MDT	Winter Weather Advisory	UNR	15 hr
Mar 22, 11:00 AM MDT	Areal Flood Warning	UNR	50 hr
Mar 24, 2:53 AM MDT	Dense Fog Advisory	UNR	33 hr
Mar 26, 12:34 AM MDT	Dense Fog Advisory	UNR	9 hr
Apr 7, 3:01 PM MDT	Winter Storm Watch	UNR	36 hr
Apr 9, 3:08 AM MDT	Winter Storm Warning	UNR	63 hr
Apr 29, 2:10 PM MDT	Winter Weather Advisory	UNR	45 hr
May 7, 2:35 PM MDT	Dense Fog Advisory	UNR	18 hr
May 11, 1:38 PM MDT	Frost Advisory	UNR	17 hr
May 14, 5:00 PM MDT	Mesoscale Discussion	SPC	90 min
May 14, 5:15 PM MDT	Severe Thunderstorm Warning	UNR	45 min
May 15, 3:52 PM MDT	Special Weather Statement	UNR	53 min
May 19, 2:47 PM MDT	Flood Watch	UNR	72 hr
May 23, 3:30 PM MDT	Areal Flood Warning	UNR	45 hr
May 25, 2:54 AM MDT	Flood Watch	UNR	4 days
May 26, 2:07 PM MDT	Mesoscale Discussion	SPC	113 min
May 29, 2:34 PM MDT	Areal Flood Advisory	UNR	41 hr
Jun 2, 2:56 PM MDT	Severe Thunderstorm Warning	UNR	64 min
Jun 2, 3:37 PM MDT	Mesoscale Discussion	SPC	53 min
Jun 2, 3:59 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 2, 5:46 PM MDT	Mesoscale Discussion	SPC	89 min
Jun 4, 12:03 PM MDT	Special Weather Statement	UNR	27 min
Jun 5, 12:38 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 2:54 PM MDT	Mesoscale Discussion	SPC	3 hr
Jun 7, 3:45 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 14, 4:01 PM MDT	Special Weather Statement	UNR	44 min
Jun 14, 4:05 PM MDT	Special Weather Statement	CYS	25 min
Jun 17, 12:04 PM MDT	Mesoscale Discussion	SPC	86 min
Jun 19, 4:00 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 19, 8:02 PM MDT	Mesoscale Discussion	SPC	118 min
Jun 19, 10:12 PM MDT	Severe Thunderstorm Warning	UNR	63 min
Jun 19, 10:32 PM MDT	Tornado Warning	UNR	28 min
Jun 19, 11:01 PM MDT	Severe Thunderstorm Warning	UNR	44 min
Jun 19, 11:58 PM MDT	Special Weather Statement	UNR	47 min
Jun 20, 6:54 PM MDT	Special Weather Statement	UNR	36 min
Jun 20, 7:38 PM MDT	Special Weather Statement	UNR	37 min
Jun 20, 8:59 PM MDT	Special Weather Statement	UNR	16 min
Jun 20, 9:19 PM MDT	Special Weather Statement	UNR	26 min
Jun 24, 6:09 PM MDT	Special Weather Statement	UNR	36 min
Jun 24, 6:48 PM MDT	Special Weather Statement	UNR	27 min
Jun 24, 7:38 PM MDT	Special Weather Statement	UNR	37 min
Jun 25, 4:19 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 25, 5:41 PM MDT	Severe Thunderstorm Warning	UNR	49 min
Jun 25, 6:15 PM MDT	Severe Thunderstorm Warning	UNR	33 min
Jun 26, 2:36 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 26, 4:37 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 26, 6:01 PM MDT	Mesoscale Discussion	SPC	119 min
Jun 26, 6:55 PM MDT	Special Weather Statement	UNR	35 min
Jun 26, 7:50 PM MDT	Severe Thunderstorm Warning	UNR	55 min
Jun 29, 6:39 PM MDT	Severe Thunderstorm Warning	UNR	24 min
Jun 30, 11:23 AM MDT	Mesoscale Discussion	SPC	97 min
Jun 30, 11:54 AM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 30, 2:35 PM MDT	Mesoscale Discussion	SPC	85 min
Jul 3, 12:43 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 1:29 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 3, 4:10 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 4:19 PM MDT	Severe Thunderstorm Warning	UNR	41 min
Jul 3, 5:42 PM MDT	Tornado Warning	UNR	33 min
Jul 3, 6:14 PM MDT	Areal Flood Warning	UNR	19 hr
Jul 3, 6:31 PM MDT	Severe Thunderstorm Warning	UNR	59 min
Jul 3, 6:39 PM MDT	Severe Thunderstorm Warning	UNR	66 min
Jul 3, 7:12 PM MDT	Severe Thunderstorm Warning	UNR	25 min
Jul 3, 9:26 PM MDT	Mesoscale Discussion	SPC	64 min
Jul 3, 10:44 PM MDT	Special Weather Statement	UNR	46 min
Jul 3, 10:59 PM MDT	Severe Thunderstorm Warning	UNR	61 min
Jul 3, 11:45 PM MDT	Special Weather Statement	UNR	60 min
Jul 3, 11:49 PM MDT	Special Weather Statement	CYS	26 min
Jul 4, 1:19 AM MDT	Areal Flood Advisory	UNR	11 hr
Jul 4, 2:28 AM MDT	Special Weather Statement	UNR	32 min
Jul 4, 1:56 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 4, 2:31 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 4, 8:02 PM MDT	Severe Thunderstorm Warning	UNR	43 min
Jul 4, 10:38 PM MDT	Special Weather Statement	UNR	52 min
Jul 4, 11:40 PM MDT	Areal Flood Advisory	UNR	11 hr
Jul 5, 7:55 AM MDT	Areal Flood Warning	UNR	26 hr
Jul 5, 12:44 PM MDT	Mesoscale Discussion	SPC	61 min
Jul 5, 1:15 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 5, 3:58 PM MDT	Severe Thunderstorm Warning	UNR	62 min
Jul 5, 5:19 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 9, 12:37 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 9, 1:31 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 9, 2:12 PM MDT	Severe Thunderstorm Warning	UNR	45 min
Jul 9, 4:42 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 14, 12:21 AM MDT	Special Weather Statement	CYS	24 min
Jul 14, 12:31 AM MDT	Special Weather Statement	UNR	44 min
Jul 15, 2:20 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 15, 2:54 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 15, 5:42 PM MDT	Mesoscale Discussion	SPC	93 min
Jul 15, 6:36 PM MDT	Special Weather Statement	UNR	24 min
Jul 15, 7:03 PM MDT	Special Weather Statement	UNR	27 min
Jul 15, 7:34 PM MDT	Special Weather Statement	UNR	41 min
Jul 15, 8:06 PM MDT	Special Weather Statement	UNR	39 min
Jul 16, 1:26 PM MDT	Mesoscale Discussion	SPC	94 min
Jul 16, 2:50 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 16, 5:29 PM MDT	Severe Thunderstorm Warning	UNR	46 min
Jul 16, 6:00 PM MDT	Mesoscale Discussion	SPC	90 min
Jul 16, 6:11 PM MDT	Severe Thunderstorm Warning	UNR	49 min
Jul 16, 6:56 PM MDT	Severe Thunderstorm Warning	UNR	49 min
Jul 17, 3:04 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 17, 4:38 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 17, 5:55 PM MDT	Severe Thunderstorm Warning	UNR	21 min
Jul 17, 6:46 PM MDT	Mesoscale Discussion	SPC	119 min
Jul 17, 6:55 PM MDT	Severe Thunderstorm Warning	UNR	33 min
Jul 19, 9:33 PM MDT	Mesoscale Discussion	SPC	87 min
Jul 21, 4:37 PM MDT	Special Weather Statement	UNR	38 min
Jul 24, 5:08 PM MDT	Special Weather Statement	UNR	37 min
Jul 24, 5:13 PM MDT	Special Weather Statement	UNR	32 min
Jul 24, 5:45 PM MDT	Special Weather Statement	UNR	30 min
Jul 27, 1:54 AM MDT	Flash Flood Watch	UNR	24 hr
Jul 27, 1:50 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 27, 2:23 PM MDT	Special Weather Statement	UNR	37 min
Jul 27, 3:19 PM MDT	Special Weather Statement	UNR	41 min
Jul 27, 5:42 PM MDT	Special Weather Statement	UNR	48 min
Jul 28, 1:24 PM MDT	Special Weather Statement	UNR	36 min
Jul 28, 1:35 PM MDT	Severe Thunderstorm Warning	UNR	40 min
Jul 28, 2:04 PM MDT	Severe Thunderstorm Warning	UNR	29 min
Jul 30, 2:55 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 30, 5:08 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 30, 5:35 PM MDT	Special Weather Statement	UNR	25 min
Jul 30, 5:56 PM MDT	Severe Thunderstorm Warning	UNR	49 min
Jul 31, 1:50 PM MDT	Flash Flood Watch	UNR	38 hr
Jul 31, 2:49 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 3, 2:22 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 3, 5:30 PM MDT	Special Weather Statement	UNR	45 min
Aug 5, 3:47 PM MDT	Severe Thunderstorm Warning	UNR	43 min
Aug 5, 4:21 PM MDT	Severe Thunderstorm Warning	UNR	33 min
Aug 5, 6:39 PM MDT	Special Weather Statement	UNR	36 min
Aug 5, 7:21 PM MDT	Special Weather Statement	UNR	24 min
Aug 7, 5:26 PM MDT	Special Weather Statement	UNR	34 min
Aug 7, 5:58 PM MDT	Special Weather Statement	UNR	32 min
Aug 10, 3:04 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 10, 3:53 PM MDT	Special Weather Statement	CYS	37 min
Aug 10, 4:16 PM MDT	Severe Thunderstorm Warning	UNR	44 min
Aug 10, 4:50 PM MDT	Severe Thunderstorm Warning	UNR	29 min
Aug 10, 4:53 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 10, 8:34 PM MDT	Mesoscale Discussion	SPC	86 min
Aug 11, 3:15 AM MDT	Flash Flood Watch	UNR	25 hr
Aug 11, 1:59 PM MDT	Tornado Watch	SPC	10 hr
Aug 11, 4:48 PM MDT	Special Weather Statement	UNR	42 min
Aug 11, 4:51 PM MDT	Mesoscale Discussion	SPC	114 min
Aug 11, 4:52 PM MDT	Flash Flood Warning	UNR	3 hr
Aug 11, 5:02 PM MDT	Severe Thunderstorm Warning	UNR	58 min
Aug 11, 5:15 PM MDT	Flash Flood Warning	UNR	3 hr
Aug 11, 5:21 PM MDT	Tornado Warning	UNR	12 min
Aug 11, 5:54 PM MDT	Mesoscale Discussion	SPC	66 min
Aug 11, 5:55 PM MDT	Severe Thunderstorm Warning	UNR	35 min
Aug 14, 8:31 AM MDT	Special Weather Statement	UNR	29 min
Aug 14, 10:56 PM MDT	Mesoscale Discussion	SPC	94 min
Aug 15, 1:04 AM MDT	Severe Thunderstorm Warning	UNR	71 min
Aug 15, 1:29 AM MDT	Mesoscale Discussion	SPC	2 hr
Aug 15, 2:12 AM MDT	Severe Thunderstorm Warning	UNR	36 min
Aug 15, 2:16 AM MDT	Severe Thunderstorm Warning	UNR	44 min
Aug 16, 5:24 PM MDT	Special Weather Statement	UNR	36 min
Aug 16, 5:36 PM MDT	Severe Thunderstorm Warning	UNR	31 min
Aug 16, 6:04 PM MDT	Special Weather Statement	UNR	26 min
Aug 16, 6:12 PM MDT	Severe Thunderstorm Warning	UNR	33 min
Aug 16, 6:39 PM MDT	Severe Thunderstorm Warning	UNR	51 min
Aug 17, 1:19 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 23, 2:08 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 23, 2:58 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 25, 6:15 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 25, 6:33 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 25, 7:55 PM MDT	Severe Thunderstorm Warning	UNR	65 min
Aug 25, 8:49 PM MDT	Mesoscale Discussion	SPC	116 min
Aug 25, 8:51 PM MDT	Severe Thunderstorm Warning	UNR	54 min
Aug 25, 9:45 PM MDT	Severe Thunderstorm Warning	UNR	43 min
Sep 1, 4:09 PM MDT	Mesoscale Discussion	SPC	2 hr
Sep 10, 1:53 PM MDT	Tornado Watch	SPC	7 hr
Sep 10, 4:38 PM MDT	Mesoscale Discussion	SPC	97 min
Sep 11, 1:55 PM MDT	Special Weather Statement	UNR	35 min
Sep 11, 3:04 PM MDT	Special Weather Statement	UNR	26 min
Sep 11, 3:29 PM MDT	Special Weather Statement	UNR	46 min
Sep 20, 2:07 PM MDT	Mesoscale Discussion	SPC	113 min
Sep 20, 4:02 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Sep 20, 6:53 PM MDT	Mesoscale Discussion	SPC	2 hr
Sep 29, 7:38 PM MDT	Mesoscale Discussion	SPC	3 hr
Oct 2, 2:08 AM MDT	Freeze Watch	UNR	12 hr
Oct 2, 1:54 PM MDT	Freeze Warning	UNR	19 hr
Oct 7, 3:03 PM MDT	Winter Storm Watch	UNR	44 hr
Oct 8, 3:38 PM MDT	Winter Storm Warning	UNR	53 hr
Oct 9, 10:07 PM MDT	Mesoscale Discussion	SPC	6 hr
Oct 16, 3:02 AM MDT	Fire Weather Watch	UNR	11 hr
Oct 16, 1:42 PM MDT	Red Flag Warning	UNR	30 hr
Oct 26, 2:36 AM MDT	Winter Weather Advisory	UNR	27 hr
Nov 9, 2:53 AM MST	Winter Weather Advisory	UNR	46 hr
Nov 24, 1:52 PM MST	Winter Weather Advisory	UNR	48 hr
Nov 26, 1:26 PM MST	Winter Storm Watch	UNR	61 hr
Nov 28, 2:17 AM MST	Blizzard Warning	UNR	70 hr
Nov 28, 2:17 AM MST	Winter Storm Warning	UNR	3 days
Nov 30, 1:48 AM MST	Mesoscale Discussion	SPC	6 hr
Nov 30, 7:17 PM MST	Winter Weather Advisory	UNR	13 hr
Dec 14, 6:13 AM MST	Freezing Fog Advisory	UNR	7 hr
Dec 21, 12:27 PM MST	Wind Advisory	UNR	22 hr
Dec 26, 2:34 PM MST	Winter Storm Watch	UNR	23 hr
Dec 27, 2:03 PM MST	Winter Storm Warning	UNR	63 hr
Dec 27, 2:03 PM MST	Winter Weather Advisory	UNR	52 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	39
Tornado Warning	3
Severe Thunderstorm Watch	17
Tornado Watch	2
Mesoscale Discussion	54
Special Weather Statement	46
Flooding
Areal Flood Warning	4
Flash Flood Warning	2
Flash Flood Watch	3
Flood Watch	2
Areal Flood Advisory	3
Winter
Blizzard Warning	2
Winter Storm Warning	6
Winter Storm Watch	6
Winter Weather Advisory	11
Cold
Freeze Warning	1
Wind Chill Warning	1
Freeze Watch	1
Frost Advisory	1
Wind Chill Advisory	3
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	1
Fire
Red Flag Warning	1
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	5
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 2018 2020

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.