Weather alerts in Illinois, December 2021

173 weather alerts in December 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

Each county as a circle sized by its count in December 2021. Tap one for its archive.

Alerts: 173
Warnings: 80
Watches: 15
Advisories: 50
Busiest day: December 11, 202162 alerts

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 1, 2:54 PM CST	Small Craft Advisory	LOT		27 hr
Dec 2, 2:00 AM CST	Dense Fog Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 11 more	4 hr
Dec 3, 3:17 AM CST	Small Craft Advisory	LOT		36 hr
Dec 3, 10:49 PM CST	Dense Fog Advisory	LOT	Boone, DeKalb, Kane, Lake, Lee, McHenry and 2 more	3 hr
Dec 4, 3:15 AM CST	Gale Watch	LOT		24 hr
Dec 4, 6:13 AM CST	Dense Fog Advisory	LOT	Ford, Grundy, Iroquois, Kankakee, Kendall, LaSalle and 2 more	3 hr
Dec 4, 10:16 AM CST	Small Craft Advisory	LOT		38 hr
Dec 5, 3:06 AM CST	Wind Advisory	DVN	Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more	33 hr
Dec 5, 3:14 AM CST	Gale Warning	LOT		39 hr
Dec 5, 1:54 PM CST	Wind Advisory	LOT	Boone, Cook, DeKalb, DuPage, Grundy, Kane and 8 more	22 hr
Dec 5, 7:11 PM CST	Severe Thunderstorm Warning	PAH	Massac	23 min
Dec 5, 8:06 PM CST	Mesoscale Discussion	SPC	Alexander, Hardin, Jackson, Johnson, Massac, Pope and 4 more	114 min
Dec 5, 8:31 PM CST	Tornado Warning	PAH	Massac, Pope	11 min
Dec 5, 8:59 PM CST	Tornado Watch	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Johnson and 7 more	7 hr
Dec 5, 9:13 PM CST	Special Weather Statement	PAH	Jackson	62 min
Dec 5, 9:29 PM CST	Tornado Warning	PAH	Jackson	31 min
Dec 5, 9:59 PM CST	Severe Thunderstorm Warning	PAH	Franklin, Jackson, Williamson	46 min
Dec 5, 10:00 PM CST	Severe Thunderstorm Warning	PAH	Jackson	30 min
Dec 5, 10:12 PM CST	Tornado Warning	PAH	Jackson	18 min
Dec 5, 10:17 PM CST	Areal Flood Advisory	PAH	Jackson	3 hr
Dec 5, 10:26 PM CST	Special Weather Statement	ILX	Clay	49 min
Dec 5, 10:27 PM CST	Tornado Warning	PAH	Franklin, Hamilton	19 min
Dec 5, 10:41 PM CST	Special Weather Statement	PAH	Alexander, Johnson, Saline, Union, Williamson	49 min
Dec 5, 10:45 PM CST	Severe Thunderstorm Warning	PAH	Hamilton, White	45 min
Dec 5, 10:50 PM CST	Severe Thunderstorm Warning	PAH	Johnson, Pope, Saline, Union, Williamson	40 min
Dec 5, 11:28 PM CST	Mesoscale Discussion	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 14 more	2 hr
Dec 6, 2:57 PM CST	Small Craft Advisory	LOT		13 hr
Dec 8, 2:58 AM CST	Small Craft Advisory	LOT		39 hr
Dec 9, 3:32 AM CST	Gale Watch	LOT		25 hr
Dec 10, 12:19 AM CST	Dense Fog Advisory	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 23 more	11 hr
Dec 10, 12:27 AM CST	Dense Fog Advisory	LOT	Ford, Grundy, Iroquois, Kankakee, Livingston, Will	12 hr
Dec 10, 2:28 AM CST	Dense Fog Advisory	LSX	Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 9 more	9 hr
Dec 10, 2:56 AM CST	Wind Advisory	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more	36 hr
Dec 10, 2:57 AM CST	Wind Advisory	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 26 more	36 hr
Dec 10, 4:11 AM CST	Gale Warning	LOT		38 hr
Dec 10, 4:11 AM CST	Small Craft Advisory	LOT		23 hr
Dec 10, 12:48 PM CST	Wind Advisory	DVN	Bureau, Putnam	23 hr
Dec 10, 1:35 PM CST	Mesoscale Discussion	SPC	Alexander, Pulaski, Union	2 hr
Dec 10, 3:07 PM CST	Tornado Watch	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 17 more	11 hr
Dec 10, 4:45 PM CST	Mesoscale Discussion	SPC	Alexander, Hardin, Jackson, Johnson, Massac, Pope and 3 more	90 min
Dec 10, 5:17 PM CST	Tornado Watch	SPC	Adams, Bond, Brown, Calhoun, Cass, Christian and 18 more	6 hr
Dec 10, 5:27 PM CST	Mesoscale Discussion	SPC	Calhoun, Jersey	3 hr
Dec 10, 6:42 PM CST	Tornado Warning	LSX	Pike	48 min
Dec 10, 6:52 PM CST	Special Weather Statement	DVN	Mercer, Rock Island	53 min
Dec 10, 7:02 PM CST	Mesoscale Discussion	SPC	Calhoun, Greene, Jersey, Macoupin, Madison, Monroe and 4 more	58 min
Dec 10, 7:11 PM CST	Tornado Warning	LSX	Pike	49 min
Dec 10, 7:15 PM CST	Tornado Warning	ILX	Cass, Morgan, Scott	45 min
Dec 10, 7:16 PM CST	Tornado Warning	LSX	Pike	14 min
Dec 10, 7:18 PM CST	Mesoscale Discussion	SPC	Champaign, Christian, Clark, Clay, Coles, Crawford and 18 more	87 min
Dec 10, 7:30 PM CST	Tornado Warning	LSX	Calhoun, Greene, Jersey	45 min
Dec 10, 7:35 PM CST	Tornado Warning Tornado observed	LSX	Calhoun, Jersey	40 min
Dec 10, 7:36 PM CST	Tornado Warning	LSX	Pike	21 min
Dec 10, 7:47 PM CST	Tornado Watch	SPC	Champaign, Clark, Clay, Coles, Crawford, Cumberland and 21 more	8 hr
Dec 10, 7:54 PM CST	Tornado Warning Tornado observed	ILX	Cass, Mason, Menard	40 min
Dec 10, 8:05 PM CST	Tornado Warning	ILX	Mason, Tazewell	40 min
Dec 10, 8:06 PM CST	Tornado Warning Tornado observed	LSX	Jersey, Macoupin, Madison	39 min
Dec 10, 8:20 PM CST	Severe Thunderstorm Warning	ILX	Christian, Sangamon	40 min
Dec 10, 8:28 PM CST	Tornado Warning	ILX	Logan, Mason, Tazewell	32 min
Dec 10, 8:32 PM CST	Severe Thunderstorm Warning	ILX	Logan, Sangamon	28 min
Dec 10, 8:33 PM CST	Tornado Warning Tornado observedConsiderable damage threat	LSX	Bond, Madison	42 min
Dec 10, 8:37 PM CST	Tornado Warning	LSX	Macoupin, Madison	17 min
Dec 10, 8:38 PM CST	Tornado Warning	ILX	McLean, Woodford	22 min
Dec 10, 8:44 PM CST	Tornado Warning Tornado observed	LSX	Fayette, Macoupin, Madison, Montgomery	46 min
Dec 10, 8:50 PM CST	Tornado Warning	ILX	McLean	12 min
Dec 10, 8:53 PM CST	Mesoscale Discussion	SPC	Bond, Champaign, Christian, Clark, Clay, Coles and 21 more	97 min
Dec 10, 8:56 PM CST	Tornado Warning	LSX	Bond, Fayette, Montgomery	34 min
Dec 10, 8:58 PM CST	Severe Thunderstorm Warning	ILX	DeWitt, McLean, Macon, Moultrie, Piatt, Sangamon	47 min
Dec 10, 9:07 PM CST	Severe Thunderstorm Warning	LSX	Calhoun	38 min
Dec 10, 9:09 PM CST	Severe Thunderstorm Warning	ILX	Christian, Macon, Moultrie, Piatt, Shelby	66 min
Dec 10, 9:21 PM CST	Severe Thunderstorm Warning	PAH	Alexander, Johnson, Pulaski, Union	39 min
Dec 10, 9:23 PM CST	Tornado Warning Tornado observed	ILX	Shelby	36 min
Dec 10, 9:26 PM CST	Severe Thunderstorm Warning	LOT	Grundy, Will	28 min
Dec 10, 9:27 PM CST	Severe Thunderstorm Warning	LOT	Ford, Iroquois, Livingston	48 min
Dec 10, 9:33 PM CST	Severe Thunderstorm Warning	ILX	Champaign, Piatt, Vermilion	42 min
Dec 10, 9:36 PM CST	Mesoscale Discussion	SPC	Clark, Coles, Cumberland, Edgar, Effingham, Shelby	54 min
Dec 10, 9:39 PM CST	Tornado Warning	LSX	Macoupin, Madison	51 min
Dec 10, 9:46 PM CST	Severe Thunderstorm Warning	LOT	Kankakee, Will	44 min
Dec 10, 9:49 PM CST	Severe Thunderstorm Warning	PAH	Johnson, Massac, Pope, Pulaski	41 min
Dec 10, 9:51 PM CST	Severe Thunderstorm Warning	ILX	Champaign, Coles, Cumberland, Douglas, Moultrie, Piatt and 1 more	54 min
Dec 10, 9:55 PM CST	Tornado Warning	ILX	Coles, Douglas, Moultrie	19 min
Dec 10, 9:55 PM CST	Special Weather Statement	LOT	Iroquois	65 min
Dec 10, 9:58 PM CST	Tornado Warning Tornado observed	ILX	Coles, Douglas, Moultrie	32 min
Dec 10, 10:00 PM CST	Tornado Warning	LOT	Will	16 min
Dec 10, 10:05 PM CST	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	25 min
Dec 10, 10:09 PM CST	Mesoscale Discussion	SPC	Massac	96 min
Dec 10, 10:18 PM CST	Special Marine Warning	LOT		27 min
Dec 10, 10:18 PM CST	Severe Thunderstorm Warning	LSX	Bond, Fayette, Macoupin, Madison, Montgomery	57 min
Dec 10, 10:19 PM CST	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair	41 min
Dec 10, 10:24 PM CST	Severe Thunderstorm Warning	ILX	Champaign, Clark, Coles, Douglas, Edgar, Vermilion	35 min
Dec 10, 10:26 PM CST	Tornado Warning Tornado observed	ILX	Coles, Douglas, Edgar, Vermilion	19 min
Dec 10, 10:26 PM CST	Tornado Warning	LSX	Bond, Fayette, Montgomery	49 min
Dec 10, 10:30 PM CST	Tornado Warning	PAH	Massac, Pope	45 min
Dec 10, 10:51 PM CST	Severe Thunderstorm Warning	LSX	Clinton, Saint Clair, Washington	39 min
Dec 10, 10:56 PM CST	Severe Thunderstorm Warning	ILX	Coles, Cumberland, Effingham, Jasper, Moultrie, Shelby	49 min
Dec 10, 11:02 PM CST	Tornado Warning	LSX	Fayette	29 min
Dec 10, 11:03 PM CST	Tornado Watch	SPC	Alexander, Clinton, Edwards, Fayette, Franklin, Gallatin and 17 more	5 hr
Dec 10, 11:10 PM CST	Tornado Warning	LSX	Clinton, Marion, Washington	50 min
Dec 10, 11:28 PM CST	Mesoscale Discussion	SPC	Alexander, Clark, Clay, Coles, Crawford, Cumberland and 24 more	92 min
Dec 10, 11:33 PM CST	Severe Thunderstorm Warning	PAH	Franklin, Jackson, Jefferson, Perry, Union, Williamson	42 min
Dec 10, 11:40 PM CST	Severe Thunderstorm Warning	ILX	Clark, Coles, Crawford, Cumberland, Edgar, Effingham and 2 more	65 min
Dec 11, 12:08 AM CST	Severe Thunderstorm Warning	PAH	Franklin, Hamilton, Jefferson, Saline, Wayne, White and 1 more	32 min
Dec 11, 12:37 AM CST	Special Weather Statement	PAH	Edwards, Wabash, White	38 min
Dec 11, 12:50 AM CST	Special Weather Statement	ILX	Lawrence	40 min
Dec 11, 5:56 PM CST	Small Craft Advisory	LOT		39 hr
Dec 13, 2:36 PM CST	High Wind Watch	DVN	Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more	24 hr
Dec 13, 3:06 PM CST	Gale Watch	LOT		30 hr
Dec 14, 3:19 AM CST	High Wind Watch	LOT	Boone, Cook, DeKalb, DuPage, Grundy, Kane and 8 more	24 hr
Dec 14, 2:20 PM CST	Wind Advisory	LSX	Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more	36 hr
Dec 14, 2:25 PM CST	Wind Advisory	LOT	Cook, Ford, Grundy, Iroquois, Kankakee, Livingston and 1 more	30 hr
Dec 14, 2:33 PM CST	High Wind Warning	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	39 hr
Dec 14, 2:33 PM CST	Wind Advisory	DVN	Hancock, Henderson, McDonough, Warren	30 hr
Dec 14, 2:47 PM CST	Wind Advisory	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 29 more	37 hr
Dec 14, 2:50 PM CST	Small Craft Advisory	LOT		27 hr
Dec 14, 9:14 PM CST	Storm Watch	LOT		7 hr
Dec 15, 3:09 AM CST	High Wind Warning	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more	30 hr
Dec 15, 3:30 AM CST	Wind Advisory	PAH	Alexander, Edwards, Franklin, Hamilton, Jackson, Jefferson and 9 more	24 hr
Dec 15, 3:51 AM CST	Gale Warning	LOT		18 hr
Dec 15, 3:51 AM CST	Storm Warning	LOT		29 hr
Dec 15, 4:51 PM CST	Mesoscale Discussion	SPC	Henderson, Jo Daviess, Mercer, Rock Island	114 min
Dec 15, 5:30 PM CST	Mesoscale Discussion	SPC	Adams	90 min
Dec 15, 5:30 PM CST	Tornado Watch	SPC	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	6 hr
Dec 15, 6:00 PM CST	Severe Thunderstorm Watch	SPC	Adams, Brown, Calhoun, Cass, Fulton, Greene and 6 more	6 hr
Dec 15, 8:27 PM CST	High Wind Warning	ILX	Cass, Champaign, DeWitt, Fulton, Knox, Logan and 15 more	7 hr
Dec 15, 8:53 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Hancock, Henderson	67 min
Dec 15, 9:09 PM CST	Severe Thunderstorm Warning	LSX	Adams, Pike	51 min
Dec 15, 9:12 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Jo Daviess, Rock Island	63 min
Dec 15, 9:14 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Henderson, McDonough, Mercer, Warren	61 min
Dec 15, 9:22 PM CST	Severe Thunderstorm Warning	LSX	Adams, Brown	53 min
Dec 15, 9:44 PM CST	Severe Thunderstorm Watch	SPC	Boone, Lee, Ogle, Winnebago	3 hr
Dec 15, 9:45 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	Bureau, Carroll, Henry, Jo Daviess, Stephenson, Whiteside	60 min
Dec 15, 9:48 PM CST	Severe Thunderstorm Warning	LSX	Adams, Brown, Calhoun, Pike	42 min
Dec 15, 9:48 PM CST	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Fulton, Greene and 16 more	87 min
Dec 15, 9:56 PM CST	Gale Warning	LOT		17 hr
Dec 15, 10:17 PM CST	Severe Thunderstorm Warning	DVN	Stephenson	31 min
Dec 16, 2:56 PM CST	Small Craft Advisory	LOT		13 hr
Dec 16, 9:02 PM CST	Small Craft Advisory	LOT		6 hr
Dec 17, 3:08 PM CST	Flood Watch	PAH	Alexander, Franklin, Hamilton, Jackson, Johnson, Pulaski and 3 more	12 hr
Dec 17, 3:42 PM CST	Small Craft Advisory	LOT		35 hr
Dec 18, 1:08 AM CST	Special Weather Statement	PAH	Johnson, Union	37 min
Dec 18, 1:26 AM CST	Special Weather Statement	PAH	Johnson, Pope	49 min
Dec 18, 10:28 AM CST	River Flood Warning	ILX	Clay, Richland	3 days
Dec 19, 3:04 AM CST	Small Craft Advisory	LOT		33 hr
Dec 21, 3:46 AM CST	Small Craft Advisory	LOT		15 hr
Dec 21, 6:16 PM CST	Gale Warning	LOT		9 hr
Dec 21, 6:16 PM CST	Small Craft Advisory	LOT		21 hr
Dec 24, 10:04 AM CST	Small Craft Advisory	LOT		5 hr
Dec 25, 2:42 AM CST	Small Craft Advisory	LOT		18 hr
Dec 25, 11:52 PM CST	Dense Fog Advisory	DVN	Bureau, Hancock, Henderson, Henry, McDonough, Putnam and 1 more	12 hr
Dec 25, 11:55 PM CST	Dense Fog Advisory	LSX	Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more	12 hr
Dec 25, 11:55 PM CST	Dense Fog Advisory	PAH	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more	10 hr
Dec 26, 1:13 AM CST	Dense Fog Advisory	ILX	Cass, Christian, DeWitt, Fulton, Knox, Logan and 13 more	11 hr
Dec 26, 3:12 AM CST	Small Craft Advisory	LOT		42 hr
Dec 26, 9:11 PM CST	Small Craft Advisory	LOT		25 hr
Dec 27, 12:08 AM CST	Special Weather Statement	DVN	Rock Island	22 min
Dec 27, 12:40 AM CST	Special Weather Statement	DVN	Whiteside	35 min
Dec 27, 12:42 AM CST	Special Weather Statement	DVN	Carroll	33 min
Dec 27, 1:41 AM CST	Special Weather Statement	LOT	DeKalb	34 min
Dec 27, 8:11 AM CST	Dense Fog Advisory	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 9 more	4 hr
Dec 27, 2:03 PM CST	Winter Weather Advisory	LOT	Boone, Cook, DeKalb, DuPage, Grundy, Kane and 8 more	28 hr
Dec 27, 2:57 PM CST	Winter Weather Advisory	DVN	Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more	27 hr
Dec 28, 3:42 AM CST	Small Craft Advisory	LOT		23 hr
Dec 28, 8:59 AM CST	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 26 more	5 hr
Dec 28, 9:08 AM CST	River Flood Warning	IND	Clark, Crawford	9 days
Dec 28, 9:08 AM CST	River Flood Warning	IND	Crawford, Lawrence	11 days
Dec 28, 9:08 AM CST	River Flood Warning	IND	Crawford, Lawrence	11 days
Dec 28, 9:15 PM CST	River Flood Warning	LSX	Fayette	3 days
Dec 29, 7:31 AM CST	Dense Fog Advisory	PAH	Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more	2 hr
Dec 29, 10:01 PM CST	Dense Fog Advisory	PAH	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 11 more	11 hr
Dec 29, 10:09 PM CST	Dense Fog Advisory	LSX	Bond, Calhoun, Clinton, Fayette, Jersey, Madison and 5 more	14 hr
Dec 30, 7:17 PM CST	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	23 hr
Dec 30, 9:23 PM CST	Dense Fog Advisory	LSX	Adams, Bond, Brown, Calhoun, Clinton, Fayette and 8 more	15 hr
Dec 30, 9:28 PM CST	Dense Fog Advisory	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 29 more	13 hr
Dec 31, 11:01 AM CST	Winter Weather Advisory	DVN	Carroll, Henry, Jo Daviess, Mercer, Rock Island, Stephenson and 1 more	10 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	34
Tornado Warning	31
Severe Thunderstorm Watch	2
Tornado Watch	6
Mesoscale Discussion	15
Special Weather Statement	13
Flooding
River Flood Warning	5
Flood Watch	1
Areal Flood Advisory	1
Winter
Winter Weather Advisory	3
Wind and dust
High Wind Warning	3
High Wind Watch	2
Wind Advisory	10
Fog and smoke
Dense Fog Advisory	17
Marine
Gale Warning	5
Special Marine Warning	1
Storm Warning	1
Gale Watch	3
Storm Watch	1
Small Craft Advisory	19

By county

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

62 more counties

Nearby

Alerts in force now Tornadoes on record The radar archive 2020 2022

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.