Weather alerts in Iowa, December 2020

Weather alerts by county

Each county as a circle sized by its count in December 2020. Tap one for its archive.

Over time

By day

Days in UTC, the clock the archive keeps.

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	Counties	Lasted
Dec 7, 2:00 AM CST	Freezing Fog Advisory	OAX	Fremont, Mills, Montgomery, Page, Pottawattamie	7 hr
Dec 7, 8:28 AM CST	Dense Fog Advisory	FSD	Clay, Dickinson	4 hr
Dec 7, 9:08 AM CST	Freezing Fog Advisory	OAX	Montgomery, Page, Pottawattamie	112 min
Dec 7, 5:58 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, O'Brien, Osceola	12 hr
Dec 7, 6:01 PM CST	Dense Fog Advisory	DMX	Adair, Boone, Calhoun, Carroll, Clarke, Dallas and 22 more	15 hr
Dec 10, 2:10 PM CST	Winter Weather Advisory	OAX	Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more	44 hr
Dec 10, 2:58 PM CST	Winter Weather Advisory	DMX	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 24 more	47 hr
Dec 11, 2:08 AM CST	Winter Weather Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 7 more	36 hr
Dec 11, 3:01 AM CST	Winter Weather Advisory	ARX	Clayton, Fayette	35 hr
Dec 12, 1:19 AM CST	Mesoscale Discussion	SPC	Benton, Black Hawk, Buchanan, Delaware, Dubuque, Grundy and 13 more	6 hr
Dec 12, 1:53 AM CST	Winter Storm Warning	DVN	Delaware, Dubuque, Jackson, Jones	12 hr
Dec 17, 6:14 AM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Ida, Lyon, O'Brien, Osceola and 3 more	7 hr
Dec 17, 5:05 PM CST	Dense Fog Advisory	DMX	Audubon, Boone, Calhoun, Carroll, Cass, Cerro Gordo and 17 more	10 hr
Dec 17, 5:07 PM CST	Dense Fog Advisory	OAX	Shelby	6 hr
Dec 17, 5:44 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 1 more	9 hr
Dec 21, 3:16 AM CST	Wind Advisory	FSD	Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux	13 hr
Dec 21, 3:25 AM CST	Wind Advisory	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Emmet, Franklin and 12 more	13 hr
Dec 21, 3:31 AM CST	Wind Advisory	ARX	Chickasaw, Clayton, Fayette, Floyd, Howard, Mitchell and 1 more	12 hr
Dec 21, 11:32 AM CST	Wind Advisory	DVN	Benton, Buchanan, Clinton, Delaware, Dubuque, Jackson and 2 more	5 hr
Dec 22, 3:54 AM CST	Winter Storm Watch	FSD	Lyon, O'Brien, Osceola, Sioux	17 hr
Dec 22, 11:50 AM CST	Winter Weather Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Plymouth and 1 more	15 hr
Dec 22, 1:02 PM CST	Wind Advisory	OAX	Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more	32 hr
Dec 22, 1:02 PM CST	Winter Weather Advisory	OAX	Harrison, Monona, Pottawattamie, Shelby	10 hr
Dec 22, 2:36 PM CST	Winter Weather Advisory	DMX	Adair, Audubon, Boone, Butler, Calhoun, Cass and 20 more	36 hr
Dec 22, 2:38 PM CST	Blizzard Warning	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	36 hr
Dec 22, 2:39 PM CST	Wind Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 38 more	33 hr
Dec 22, 9:01 PM CST	Blizzard Warning	DMX	Calhoun, Carroll, Cerro Gordo, Crawford, Emmet, Hancock and 9 more	30 hr
Dec 22, 9:07 PM CST	Wind Advisory	ARX	Chickasaw, Fayette, Floyd, Howard, Mitchell, Winneshiek	27 hr
Dec 22, 9:09 PM CST	Winter Weather Advisory	ARX	Chickasaw, Floyd, Howard, Mitchell	29 hr
Dec 22, 10:51 PM CST	Blizzard Warning	OAX	Monona	19 hr
Dec 22, 10:51 PM CST	Winter Storm Warning	OAX	Harrison, Mills, Pottawattamie, Shelby	22 hr
Dec 23, 3:43 AM CST	Wind Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	23 hr
Dec 23, 9:38 AM CST	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Emmet, Lyon and 5 more	5 hr
Dec 23, 12:33 PM CST	Mesoscale Discussion	SPC	Calhoun, Cerro Gordo, Hancock, Humboldt, Kossuth, Mitchell and 7 more	4 hr
Dec 23, 5:15 PM CST	Mesoscale Discussion	SPC	Kossuth, Winnebago	6 hr
Dec 24, 1:55 AM CST	Wind Chill Advisory	ARX	Chickasaw, Fayette, Floyd, Howard, Mitchell, Winneshiek	10 hr
Dec 24, 2:56 AM CST	Wind Chill Advisory	FSD	Buena Vista, Clay, Dickinson, O'Brien, Osceola	9 hr
Dec 24, 3:16 AM CST	Wind Chill Advisory	DMX	Bremer, Butler, Calhoun, Cerro Gordo, Emmet, Franklin and 13 more	9 hr
Dec 24, 3:16 AM CST	Wind Chill Advisory	DMX	Bremer, Butler, Calhoun, Cerro Gordo, Emmet, Franklin and 13 more	30 hr
Dec 24, 1:24 PM CST	Wind Chill Advisory	ARX	Chickasaw, Floyd, Howard, Mitchell	19 hr
Dec 27, 9:24 AM CST	Winter Weather Advisory	OAX	Fremont, Montgomery, Page	3 hr
Dec 27, 9:29 AM CST	Winter Weather Advisory	DMX	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 24 more	4 hr
Dec 27, 9:56 AM CST	Winter Weather Advisory	DVN	Benton, Buchanan, Delaware	8 hr
Dec 27, 3:05 PM CST	Winter Storm Watch	OAX	Harrison, Mills, Monona, Montgomery, Pottawattamie, Shelby	12 hr
Dec 27, 5:23 PM CST	Winter Storm Watch	DMX	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 31 more	10 hr
Dec 27, 7:00 PM CST	Winter Storm Watch	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	8 hr
Dec 28, 3:01 AM CST	Winter Weather Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	42 hr
Dec 28, 3:19 AM CST	Winter Storm Watch	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 14 more	17 hr
Dec 28, 3:24 AM CST	Winter Storm Warning	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 36 more	41 hr
Dec 28, 3:24 AM CST	Winter Weather Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	48 hr
Dec 28, 3:34 AM CST	Winter Weather Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	44 hr
Dec 28, 3:45 AM CST	Winter Storm Watch	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 1 more	11 hr
Dec 28, 3:45 AM CST	Winter Weather Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	53 hr
Dec 28, 2:31 PM CST	Winter Storm Warning	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 1 more	37 hr
Dec 28, 3:15 PM CST	Winter Storm Warning	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	38 hr
Dec 28, 3:15 PM CST	Winter Weather Advisory	DVN	Benton, Buchanan, Delaware, Des Moines, Iowa, Lee and 1 more	38 hr
Dec 28, 3:43 PM CST	Winter Storm Warning	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	27 hr
Dec 29, 7:18 AM CST	Winter Storm Warning	FSD	Plymouth, Woodbury	11 hr
Dec 29, 10:02 AM CST	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Carroll and 37 more	5 hr
Dec 29, 2:17 PM CST	Mesoscale Discussion	SPC	Benton, Black Hawk, Boone, Bremer, Buchanan, Cedar and 26 more	4 hr
Dec 29, 6:05 PM CST	Special Weather Statement	DVN	Cedar, Clinton, Iowa, Johnson, Muscatine, Scott and 1 more	85 min

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Mesoscale Discussion	6
Special Weather Statement	1
Winter
Blizzard Warning	3
Winter Storm Warning	7
Winter Storm Watch	6
Winter Weather Advisory	16
Cold
Wind Chill Advisory	5
Wind and dust
Wind Advisory	8
Fog and smoke
Dense Fog Advisory	7
Freezing Fog Advisory	2

By county

Every county with at least one alert. A county page lists each alert that covered it.

59 more counties

Nearby

Alerts in force now Tornadoes on record The radar archive 2019 2021

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. Rebuilt daily.