Alert archive / South Dakota / Fall River County

Weather alerts in Fall River County, South Dakota, 2022

157 weather alerts in 2022, 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 2022. Tap one for its archive.

Alerts: 157
Warnings: 52
Watches: 26
Advisories: 29
Busiest month: July36 alerts
Busiest day: July 1, 20227 alerts

Over time

By month

Warning verification

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

Fall River County, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	20	16	20%	27	81%	33 min
Flash flood warnings	1	0	100%	0

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Rapid City, SD: tornado warnings	7	0	100%	1	0%
NWS Rapid City, SD: severe thunderstorm warnings	267	178	33%	439	80%	26 min
NWS Rapid City, SD: flash flood warnings	6	3	50%	5	60%	89 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, 1:31 AM MST	Wind Advisory	UNR	15 hr
Jan 4, 1:32 AM MST	Wind Chill Advisory	UNR	57 hr
Jan 13, 1:47 PM MST	Wind Advisory	UNR	27 hr
Jan 30, 1:50 PM MST	Fire Weather Watch	UNR	12 hr
Jan 31, 1:42 AM MST	Wind Advisory	UNR	24 hr
Jan 31, 1:45 AM MST	Red Flag Warning	UNR	16 hr
Feb 7, 1:22 PM MST	Wind Advisory	UNR	28 hr
Feb 8, 3:27 AM MST	Red Flag Warning	UNR	14 hr
Feb 11, 8:21 AM MST	Mesoscale Discussion	SPC	2 hr
Feb 20, 3:07 AM MST	Winter Weather Advisory	UNR	57 hr
Feb 22, 3:09 AM MST	Wind Chill Advisory	UNR	32 hr
Mar 3, 12:33 AM MST	Dense Fog Advisory	UNR	10 hr
Mar 4, 3:32 AM MST	Winter Weather Advisory	UNR	43 hr
Mar 4, 1:37 PM MST	Winter Storm Warning	UNR	24 hr
Mar 8, 1:51 AM MST	Winter Weather Advisory	UNR	30 hr
Mar 15, 2:41 AM MDT	Red Flag Warning	UNR	15 hr
Mar 19, 1:55 PM MDT	Red Flag Warning	UNR	30 hr
Mar 23, 1:20 PM MDT	Red Flag Warning	UNR	6 hr
Mar 27, 3:15 AM MDT	Fire Weather Watch	UNR	10 hr
Mar 27, 1:30 PM MDT	Red Flag Warning	UNR	30 hr
Apr 3, 2:40 AM MDT	Fire Weather Watch	UNR	11 hr
Apr 3, 1:43 PM MDT	Red Flag Warning	UNR	52 hr
Apr 3, 1:58 PM MDT	High Wind Watch	UNR	24 hr
Apr 4, 2:14 PM MDT	High Wind Warning	UNR	3 days
Apr 7, 2:38 AM MDT	Wind Advisory	UNR	17 hr
Apr 12, 3:33 AM MDT	Wind Advisory	UNR	20 hr
Apr 16, 2:18 PM MDT	Wind Advisory	UNR	29 hr
Apr 18, 2:41 AM MDT	Fire Weather Watch	UNR	12 hr
Apr 18, 2:28 PM MDT	Red Flag Warning	UNR	29 hr
Apr 22, 2:26 AM MDT	Winter Weather Advisory	UNR	52 hr
Apr 22, 2:03 PM MDT	High Wind Warning	UNR	40 hr
Apr 22, 2:38 PM MDT	Mesoscale Discussion	SPC	67 min
Apr 22, 3:45 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 22, 7:25 PM MDT	Severe Thunderstorm Warning	UNR	65 min
Apr 22, 9:10 PM MDT	Mesoscale Discussion	SPC	2 hr
Apr 22, 9:11 PM MDT	Severe Thunderstorm Warning	UNR	64 min
Apr 23, 11:32 AM MDT	Mesoscale Discussion	SPC	5 hr
Apr 28, 2:09 PM MDT	High Wind Watch	UNR	12 hr
Apr 29, 2:02 AM MDT	Wind Advisory	UNR	41 hr
Apr 29, 11:07 AM MDT	Special Weather Statement	UNR	83 min
May 8, 1:23 PM MDT	Wind Advisory	UNR	29 hr
May 12, 3:01 PM MDT	Wind Advisory	UNR	4 hr
May 17, 1:59 PM MDT	Mesoscale Discussion	SPC	91 min
May 17, 2:16 PM MDT	Special Weather Statement	UNR	29 min
May 19, 2:17 PM MDT	Freeze Watch	UNR	12 hr
May 20, 1:59 AM MDT	Freeze Warning	UNR	29 hr
May 21, 6:37 AM MDT	Freeze Warning	UNR	25 hr
May 23, 1:38 PM MDT	Frost Advisory	UNR	15 hr
May 27, 2:52 PM MDT	Mesoscale Discussion	SPC	83 min
May 27, 4:19 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
May 27, 5:46 PM MDT	Mesoscale Discussion	SPC	119 min
May 28, 1:46 PM MDT	Mesoscale Discussion	SPC	119 min
May 28, 2:24 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 28, 3:36 PM MDT	Special Weather Statement	UNR	24 min
Jun 5, 1:57 PM MDT	Special Weather Statement	UNR	33 min
Jun 5, 2:28 PM MDT	Special Weather Statement	UNR	32 min
Jun 6, 1:55 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 6, 2:25 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 6, 2:48 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	57 min
Jun 6, 3:42 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	48 min
Jun 6, 4:22 PM MDT	Mesoscale Discussion	SPC	83 min
Jun 7, 11:16 AM MDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 12:57 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 7, 2:55 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 13, 5:55 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 13, 7:01 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	59 min
Jun 13, 7:55 PM MDT	Severe Thunderstorm Warning	UNR	43 min
Jun 13, 8:19 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	56 min
Jun 13, 8:56 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	49 min
Jun 13, 9:25 PM MDT	Severe Thunderstorm Warning Destructive damage threat	UNR	65 min
Jun 20, 12:15 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 12:37 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 20, 3:03 PM MDT	Severe Thunderstorm Warning	UNR	72 min
Jun 28, 1:31 PM MDT	Red Flag Warning	UNR	28 hr
Jun 29, 2:01 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 29, 6:54 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 1, 2:05 PM MDT	Mesoscale Discussion	SPC	85 min
Jul 1, 2:32 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 1, 4:22 PM MDT	Mesoscale Discussion	SPC	113 min
Jul 1, 4:30 PM MDT	Severe Thunderstorm Warning	UNR	23 min
Jul 1, 4:48 PM MDT	Special Weather Statement	UNR	27 min
Jul 1, 5:15 PM MDT	Special Weather Statement	UNR	30 min
Jul 1, 5:36 PM MDT	Special Weather Statement	UNR	39 min
Jul 1, 7:01 PM MDT	Mesoscale Discussion	SPC	119 min
Jul 2, 6:35 PM MDT	Severe Thunderstorm Warning	UNR	40 min
Jul 2, 7:38 PM MDT	Severe Thunderstorm Warning	UNR	67 min
Jul 3, 1:49 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 3, 3:32 PM MDT	Special Weather Statement	UNR	43 min
Jul 3, 3:41 PM MDT	Severe Thunderstorm Warning	UNR	25 min
Jul 3, 6:58 PM MDT	Special Weather Statement	UNR	47 min
Jul 4, 4:46 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 5, 3:37 PM MDT	Mesoscale Discussion	SPC	53 min
Jul 6, 9:29 AM MDT	Flood Watch	UNR	14 hr
Jul 7, 2:54 PM MDT	Severe Thunderstorm Warning	UNR	47 min
Jul 7, 3:36 PM MDT	Mesoscale Discussion	SPC	114 min
Jul 7, 3:45 PM MDT	Special Weather Statement	UNR	45 min
Jul 7, 4:35 PM MDT	Severe Thunderstorm Warning	UNR	40 min
Jul 8, 1:59 PM MDT	Fire Weather Watch	UNR	13 hr
Jul 9, 3:00 AM MDT	Red Flag Warning	UNR	17 hr
Jul 16, 3:10 PM MDT	Special Weather Statement	UNR	35 min
Jul 17, 1:42 PM MDT	Heat Advisory	UNR	30 hr
Jul 17, 1:53 PM MDT	Fire Weather Watch	UNR	13 hr
Jul 18, 2:32 AM MDT	Red Flag Warning	UNR	17 hr
Jul 19, 1:59 AM MDT	Red Flag Warning	UNR	18 hr
Jul 20, 2:24 AM MDT	Red Flag Warning	UNR	18 hr
Jul 22, 2:40 AM MDT	Red Flag Warning	UNR	19 hr
Jul 24, 3:48 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 29, 1:35 PM MDT	Special Weather Statement	CYS	25 min
Jul 29, 3:45 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 29, 3:49 PM MDT	Severe Thunderstorm Warning	UNR	26 min
Jul 29, 5:04 PM MDT	Special Weather Statement	UNR	41 min
Jul 31, 2:38 PM MDT	Red Flag Warning	UNR	30 hr
Aug 4, 2:12 AM MDT	Heat Advisory	UNR	17 hr
Aug 4, 1:46 PM MDT	Heat Advisory	UNR	29 hr
Aug 13, 5:04 PM MDT	Special Weather Statement	UNR	41 min
Aug 14, 4:18 PM MDT	Mesoscale Discussion	SPC	117 min
Aug 17, 5:20 PM MDT	Special Weather Statement	UNR	55 min
Aug 24, 1:43 PM MDT	Severe Thunderstorm Warning	UNR	62 min
Aug 24, 2:10 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 24, 2:57 PM MDT	Severe Thunderstorm Warning	UNR	35 min
Aug 24, 4:35 PM MDT	Flash Flood Warning	UNR	4 hr
Aug 24, 5:20 PM MDT	Special Weather Statement	CYS	25 min
Aug 25, 2:50 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 25, 7:09 PM MDT	Severe Thunderstorm Warning	UNR	44 min
Sep 7, 3:13 AM MDT	Fire Weather Watch	UNR	10 hr
Sep 7, 1:38 PM MDT	Red Flag Warning	UNR	29 hr
Sep 8, 5:34 PM MDT	Special Weather Statement	UNR	86 min
Sep 12, 1:48 PM MDT	Fire Weather Watch	UNR	12 hr
Sep 13, 1:33 AM MDT	Red Flag Warning	UNR	17 hr
Sep 18, 2:51 AM MDT	Fire Weather Watch	UNR	11 hr
Sep 18, 1:59 PM MDT	Red Flag Warning	UNR	30 hr
Oct 2, 3:34 PM MDT	Mesoscale Discussion	SPC	116 min
Oct 2, 5:26 PM MDT	Special Weather Statement	UNR	49 min
Oct 7, 1:19 PM MDT	Freeze Warning	UNR	16 hr
Oct 11, 1:54 AM MDT	Fire Weather Watch	UNR	11 hr
Oct 11, 1:11 PM MDT	Red Flag Warning	UNR	54 hr
Oct 20, 2:14 PM MDT	Red Flag Warning	UNR	52 hr
Oct 23, 2:32 PM MDT	High Wind Warning	UNR	18 hr
Oct 31, 2:09 AM MDT	Fire Weather Watch	UNR	12 hr
Oct 31, 1:59 PM MDT	Red Flag Warning	UNR	55 hr
Nov 6, 2:26 PM MST	Wind Advisory	UNR	27 hr
Nov 9, 6:19 AM MST	Winter Weather Advisory	UNR	26 hr
Nov 28, 10:26 AM MST	Winter Weather Advisory	UNR	11 hr
Dec 8, 2:15 AM MST	Winter Weather Advisory	UNR	21 hr
Dec 9, 1:42 PM MST	Winter Storm Watch	UNR	61 hr
Dec 12, 3:02 AM MST	Blizzard Warning	UNR	4 days
Dec 13, 3:24 AM MST	Mesoscale Discussion	SPC	5 hr
Dec 13, 1:41 PM MST	Mesoscale Discussion	SPC	4 hr
Dec 14, 3:23 AM MST	Winter Weather Advisory	UNR	57 hr
Dec 17, 1:28 PM MST	Wind Chill Watch	UNR	60 hr
Dec 19, 1:38 AM MST	Wind Chill Warning	UNR	5 days
Dec 19, 1:38 AM MST	Wind Chill Advisory	UNR	45 hr
Dec 21, 1:47 AM MST	Winter Weather Advisory	UNR	51 hr
Dec 21, 11:05 AM MST	Mesoscale Discussion	SPC	3 hr
Dec 21, 1:04 PM MST	Snow Squall Warning	UNR	56 min
Dec 21, 2:15 PM MST	Mesoscale Discussion	SPC	3 hr
Dec 27, 8:40 AM MST	Wind Advisory	UNR	11 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	20
Severe Thunderstorm Watch	9
Mesoscale Discussion	31
Special Weather Statement	19
Flooding
Flash Flood Warning	1
Flood Watch	1
Winter
Blizzard Warning	1
Snow Squall Warning	1
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	9
Heat
Heat Advisory	3
Cold
Freeze Warning	3
Wind Chill Warning	1
Freeze Watch	1
Wind Chill Watch	1
Frost Advisory	1
Wind Chill Advisory	3
Wind and dust
High Wind Warning	3
High Wind Watch	2
Wind Advisory	12
Fire
Red Flag Warning	21
Fire Weather Watch	11
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 2021 2023

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.