Weather alerts in Sac County, Iowa, 2022

100 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Sac County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Alerts: 100
Warnings: 24
Watches: 15
Advisories: 39
Busiest month: July18 alerts
Busiest day: July 24, 20226 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 1 tornado warnings covering Sac County in 2022 had a tornado report inside them.

Sac County, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	12	9	25%	5	60%	28 min
Flash flood warnings	0			0

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Des Moines, IA: tornado warnings	34	14	59%	42	93%	24 min
NWS Des Moines, IA: severe thunderstorm warnings	204	89	56%	230	70%	22 min
NWS Des Moines, IA: flash flood warnings	8	4	50%	11	91%	53 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 4, 3:08 AM CST	Wind Advisory	DMX	33 hr
Jan 5, 3:17 AM CST	Wind Chill Advisory	DMX	9 hr
Jan 5, 3:17 AM CST	Wind Chill Advisory	DMX	32 hr
Jan 12, 10:12 AM CST	Winter Storm Watch	DMX	29 hr
Jan 13, 2:59 PM CST	Winter Storm Warning	DMX	42 hr
Jan 14, 8:51 AM CST	Mesoscale Discussion	SPC	3 hr
Jan 19, 3:00 AM CST	Wind Chill Advisory	DMX	33 hr
Jan 20, 2:00 PM CST	Wind Chill Advisory	DMX	22 hr
Jan 24, 3:22 AM CST	Wind Chill Advisory	DMX	42 hr
Jan 24, 2:59 PM CST	Wind Chill Advisory	DMX	42 hr
Feb 2, 3:28 AM CST	Wind Chill Advisory	DMX	33 hr
Feb 11, 10:30 AM CST	Wind Advisory	DMX	8 hr
Feb 20, 2:58 PM CST	Winter Weather Advisory	DMX	51 hr
Feb 22, 2:14 PM CST	Wind Chill Advisory	DMX	20 hr
Mar 15, 3:06 AM CDT	Dense Fog Advisory	DMX	9 hr
Mar 24, 3:28 PM CDT	Wind Advisory	DMX	28 hr
Apr 6, 3:48 AM CDT	Wind Advisory	DMX	42 hr
Apr 12, 10:24 AM CDT	Wind Advisory	DMX	4 hr
Apr 12, 5:00 PM CDT	Severe Thunderstorm Warning	DMX	45 min
Apr 12, 5:11 PM CDT	Tornado Watch	SPC	7 hr
Apr 12, 8:10 PM CDT	Severe Thunderstorm Warning	DMX	50 min
Apr 12, 8:47 PM CDT	Tornado Warning	DMX	28 min
Apr 12, 8:59 PM CDT	Severe Thunderstorm Warning	DMX	61 min
Apr 13, 3:04 PM CDT	Wind Advisory	DMX	28 hr
Apr 14, 3:32 AM CDT	Red Flag Warning	DMX	17 hr
Apr 14, 10:34 AM CDT	High Wind Warning	DMX	8 hr
Apr 20, 11:16 PM CDT	Dense Fog Advisory	DMX	12 hr
Apr 22, 3:43 AM CDT	Wind Advisory	DMX	39 hr
Apr 23, 10:41 AM CDT	High Wind Warning	DMX	8 hr
Apr 23, 4:01 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 25, 2:56 AM CDT	Freeze Warning	DMX	29 hr
May 11, 1:15 PM CDT	Tornado Watch	SPC	8 hr
May 12, 6:12 PM CDT	Mesoscale Discussion	SPC	63 min
May 12, 7:00 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
May 12, 7:02 PM CDT	Mesoscale Discussion	SPC	88 min
May 19, 7:04 PM CDT	Mesoscale Discussion	SPC	116 min
May 19, 8:57 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 21, 2:48 PM CDT	Frost Advisory	DMX	18 hr
May 29, 5:54 AM CDT	Mesoscale Discussion	SPC	2 hr
May 30, 3:41 AM CDT	Wind Advisory	DMX	19 hr
May 30, 5:17 AM CDT	Severe Thunderstorm Warning	DMX	43 min
May 30, 5:40 AM CDT	Mesoscale Discussion	SPC	95 min
May 30, 5:23 PM CDT	Tornado Watch	SPC	5 hr
May 30, 7:30 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 5, 3:45 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 12, 3:02 PM CDT	Heat Advisory	DMX	52 hr
Jun 14, 8:46 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 14, 9:23 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 15, 1:52 AM CDT	Mesoscale Discussion	SPC	83 min
Jun 15, 3:42 AM CDT	Mesoscale Discussion	SPC	93 min
Jun 15, 6:21 AM CDT	Special Weather Statement	DMX	39 min
Jun 20, 3:04 AM CDT	Heat Advisory	DMX	17 hr
Jun 25, 1:56 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 3, 2:27 PM CDT	Heat Advisory	DMX	54 hr
Jul 5, 3:50 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 5, 5:09 PM CDT	Mesoscale Discussion	SPC	66 min
Jul 5, 5:31 PM CDT	Severe Thunderstorm Warning	DMX	59 min
Jul 5, 6:08 PM CDT	Severe Thunderstorm Warning	DMX	52 min
Jul 10, 10:55 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 11, 1:10 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 11, 3:35 AM CDT	Severe Thunderstorm Warning	DMX	40 min
Jul 11, 3:58 AM CDT	Mesoscale Discussion	SPC	92 min
Jul 11, 4:05 AM CDT	Severe Thunderstorm Warning	DMX	40 min
Jul 22, 3:22 AM CDT	Heat Advisory	DMX	41 hr
Jul 22, 5:39 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 23, 7:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 23, 8:49 PM CDT	Severe Thunderstorm Warning	DMX	41 min
Jul 23, 8:55 PM CDT	Severe Thunderstorm Warning	DMX	50 min
Jul 23, 8:55 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 23, 9:05 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	40 min
Jul 23, 9:48 PM CDT	Special Weather Statement	DMX	42 min
Aug 1, 3:23 AM CDT	Heat Advisory	DMX	41 hr
Aug 5, 2:51 AM CDT	Heat Advisory	DMX	42 hr
Aug 7, 2:08 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 18, 8:43 PM CDT	Mesoscale Discussion	SPC	32 min
Aug 18, 9:39 PM CDT	Severe Thunderstorm Warning	DMX	36 min
Aug 26, 5:34 AM CDT	Dense Fog Advisory	DMX	3 hr
Aug 27, 2:50 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 27, 2:39 PM CDT	Frost Advisory	DMX	17 hr
Oct 7, 2:46 AM CDT	Freeze Warning	DMX	30 hr
Oct 11, 3:01 PM CDT	Fire Weather Watch	DMX	13 hr
Oct 12, 12:27 PM CDT	Wind Advisory	DMX	7 hr
Oct 12, 2:49 PM CDT	Red Flag Warning	DMX	28 hr
Oct 23, 3:03 AM CDT	Wind Advisory	DMX	23 hr
Nov 5, 1:59 PM CDT	Fire Weather Watch	DMX	13 hr
Nov 6, 2:19 AM CST	Red Flag Warning	DMX	16 hr
Nov 28, 2:28 PM CST	Winter Weather Advisory	DMX	28 hr
Dec 1, 3:21 AM CST	Wind Advisory	DMX	13 hr
Dec 2, 2:55 AM CST	Wind Advisory	DMX	24 hr
Dec 7, 2:54 PM CST	Winter Weather Advisory	DMX	42 hr
Dec 11, 2:54 PM CST	Dense Fog Advisory	DMX	17 hr
Dec 12, 3:49 AM CST	Winter Storm Watch	DMX	11 hr
Dec 12, 3:16 PM CST	Winter Weather Advisory	DMX	18 hr
Dec 12, 3:19 PM CST	Wind Advisory	DMX	30 hr
Dec 19, 3:50 AM CST	Winter Storm Watch	DMX	35 hr
Dec 20, 3:06 PM CST	Winter Storm Warning	DMX	72 hr
Dec 21, 11:25 AM CST	Blizzard Warning	DMX	67 hr
Dec 23, 3:03 AM CST	Wind Chill Warning	DMX	33 hr
Dec 24, 5:49 AM CST	Winter Weather Advisory	DMX	6 hr
Dec 24, 3:18 PM CST	Wind Chill Advisory	DMX	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	12
Tornado Warning	1
Severe Thunderstorm Watch	7
Tornado Watch	3
Mesoscale Discussion	20
Special Weather Statement	2
Winter
Blizzard Warning	1
Winter Storm Warning	2
Winter Storm Watch	3
Winter Weather Advisory	5
Heat
Heat Advisory	6
Cold
Freeze Warning	2
Wind Chill Warning	1
Frost Advisory	2
Wind Chill Advisory	9
Wind and dust
High Wind Warning	2
Wind Advisory	13
Fire
Red Flag Warning	3
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	4

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.