Weather alerts in Illinois, May 2021

187 weather alerts in May 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 May 2021. Tap one for its archive.

Alerts: 187
Warnings: 77
Watches: 10
Advisories: 41
Busiest day: May 3, 202133 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
May 1, 3:26 AM CDT	Wind Advisory	DVN	Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more	16 hr
May 1, 9:55 PM CDT	Small Craft Advisory	LOT		29 hr
May 3, 2:08 PM CDT	Mesoscale Discussion	SPC	Adams, Bond, Brown, Calhoun, Cass, Champaign and 55 more	67 min
May 3, 2:20 PM CDT	Special Weather Statement	DVN	Hancock, Henderson	40 min
May 3, 2:47 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Bond, Brown, Bureau, Calhoun, Cass and 43 more	6 hr
May 3, 2:54 PM CDT	Severe Thunderstorm Warning	LSX	Adams	51 min
May 3, 3:14 PM CDT	Special Weather Statement	DVN	Henderson, Mercer, Rock Island, Warren	31 min
May 3, 3:27 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	48 min
May 3, 3:31 PM CDT	Special Weather Statement	ILX	Knox	29 min
May 3, 3:59 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Morgan, Schuyler	46 min
May 3, 4:10 PM CDT	Special Weather Statement	ILX	Schuyler	35 min
May 3, 4:13 PM CDT	Severe Thunderstorm Warning	LSX	Brown	28 min
May 3, 4:30 PM CDT	Special Weather Statement	ILX	Fulton	30 min
May 3, 4:39 PM CDT	Special Weather Statement	LOT	Lee	66 min
May 3, 4:40 PM CDT	Special Weather Statement	DVN	Bureau, Putnam, Whiteside	50 min
May 3, 4:43 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Menard, Morgan, Sangamon, Schuyler	47 min
May 3, 4:50 PM CDT	Tornado Warning	ILX	Cass, Morgan	25 min
May 3, 4:51 PM CDT	Mesoscale Discussion	SPC	Monroe, Randolph, Saint Clair	84 min
May 3, 5:00 PM CDT	Special Weather Statement	ILX	Mason, Menard	30 min
May 3, 5:08 PM CDT	Tornado Warning	ILX	Cass, Menard, Morgan, Sangamon	37 min
May 3, 5:15 PM CDT	Mesoscale Discussion	SPC	Bond, Brown, Calhoun, Cass, Champaign, Christian and 38 more	90 min
May 3, 5:17 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Logan, Mason, Menard	43 min
May 3, 5:25 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Scott	33 min
May 3, 5:30 PM CDT	Tornado Warning Tornado observed	ILX	Menard, Sangamon	30 min
May 3, 5:32 PM CDT	Special Weather Statement	LOT	DeKalb, Ogle	58 min
May 3, 5:52 PM CDT	Tornado Warning	ILX	Logan, Menard, Sangamon	23 min
May 3, 6:02 PM CDT	Special Weather Statement	ILX	Logan	43 min
May 3, 6:13 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	47 min
May 3, 6:16 PM CDT	Tornado Warning Tornado observed	ILX	Christian, Logan, Macon, Sangamon	29 min
May 3, 6:32 PM CDT	Special Weather Statement	LOT	DuPage, Kendall	43 min
May 3, 6:32 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	32 min
May 3, 6:37 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon, Sangamon	53 min
May 3, 6:42 PM CDT	Tornado Warning Tornado observed	ILX	Macon	33 min
May 3, 6:45 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	23 min
May 3, 6:54 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Sangamon	51 min
May 3, 7:06 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Douglas, Macon, Moultrie, Shelby	54 min
May 3, 7:20 PM CDT	Tornado Warning	ILX	Moultrie	25 min
May 3, 7:32 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	21 min
May 3, 7:33 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Shelby	42 min
May 3, 7:39 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Macoupin, Montgomery	51 min
May 3, 7:57 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Coles, Edgar	63 min
May 3, 7:58 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Clay, Crawford, Cumberland, Effingham, Jasper and 2 more	3 hr
May 3, 8:02 PM CDT	Tornado Warning	ILX	Coles	28 min
May 3, 8:19 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Cumberland, Moultrie, Shelby	41 min
May 3, 8:53 PM CDT	Flash Flood Warning	ILX	Coles	50 min
May 3, 9:02 PM CDT	Special Weather Statement	ILX	Clark, Cumberland, Effingham, Jasper	43 min
May 3, 9:02 PM CDT	Severe Thunderstorm Warning	LOT	Iroquois	43 min
May 4, 1:06 AM CDT	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 8 more	114 min
May 4, 1:41 AM CDT	Severe Thunderstorm Watch	SPC	Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more	6 hr
May 4, 2:41 AM CDT	Special Weather Statement	PAH	Massac	64 min
May 4, 3:22 AM CDT	Special Weather Statement	PAH	Massac, Pope, Pulaski	53 min
May 4, 4:17 AM CDT	Mesoscale Discussion	SPC	Massac	88 min
May 4, 4:34 AM CDT	Areal Flood Advisory	PAH	Johnson	3 hr
May 4, 2:50 PM CDT	Small Craft Advisory	LOT		24 hr
May 6, 9:52 AM CDT	Mesoscale Discussion	SPC	Bond, Calhoun, Clinton, Greene, Jersey, Macoupin and 7 more	83 min
May 6, 10:05 AM CDT	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more	85 min
May 6, 12:02 PM CDT	Mesoscale Discussion	SPC	Alexander, Hardin, Jackson, Johnson, Massac, Pope and 4 more	118 min
May 6, 12:26 PM CDT	Special Weather Statement	PAH	Jackson, Jefferson, Perry	49 min
May 6, 12:38 PM CDT	Severe Thunderstorm Watch	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	5 hr
May 6, 12:39 PM CDT	Special Weather Statement	LOT	Ford, Iroquois	96 min
May 6, 1:10 PM CDT	Special Weather Statement	ILX	Clay	35 min
May 6, 1:10 PM CDT	Mesoscale Discussion	SPC	Champaign, Christian, Coles, Cumberland, DeWitt, Douglas and 10 more	2 hr
May 6, 1:13 PM CDT	Severe Thunderstorm Warning	PAH	Alexander	47 min
May 6, 1:29 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Richland	46 min
May 6, 2:05 PM CDT	Special Weather Statement	PAH	Edwards, Gallatin, Wabash, White	40 min
May 6, 2:09 PM CDT	Special Weather Statement	ILX	Lawrence	36 min
May 6, 2:17 PM CDT	Tornado Warning Tornado observed	ILX	Christian, Shelby	28 min
May 6, 2:29 PM CDT	Tornado Warning	ILX	Moultrie, Shelby	31 min
May 6, 2:58 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Cumberland, Moultrie, Shelby	26 min
May 6, 3:01 PM CDT	Severe Thunderstorm Warning	ILX	Effingham	27 min
May 6, 3:22 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham	36 min
May 6, 3:40 PM CDT	Severe Thunderstorm Warning	LSX	Marion	26 min
May 6, 3:40 PM CDT	Special Weather Statement	PAH	Jefferson	50 min
May 6, 3:52 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson, Wayne	38 min
May 6, 4:31 PM CDT	Special Weather Statement	PAH	Franklin, Hamilton, Wayne	44 min
May 6, 4:39 PM CDT	Special Weather Statement	ILX	Clay	36 min
May 6, 4:46 PM CDT	Tornado Warning	ILX	Clay	14 min
May 6, 4:54 PM CDT	Tornado Warning	PAH	Wayne	36 min
May 6, 5:18 PM CDT	Special Weather Statement	PAH	Gallatin, Johnson, Saline, Union, Williamson	42 min
May 6, 5:27 PM CDT	Severe Thunderstorm Warning	PAH	Johnson, Pope, Saline, Williamson	38 min
May 6, 5:57 PM CDT	Severe Thunderstorm Warning	PAH	Johnson, Massac	33 min
May 6, 6:12 PM CDT	Special Weather Statement	PAH	Pope	33 min
May 6, 6:32 PM CDT	Special Weather Statement	PAH	Massac	28 min
May 6, 6:47 PM CDT	Special Weather Statement	PAH	Massac	43 min
May 7, 2:57 AM CDT	Small Craft Advisory	LOT		24 hr
May 7, 1:48 PM CDT	Frost Advisory	DVN	Bureau, Carroll, Henry, Jo Daviess, Putnam, Stephenson and 1 more	18 hr
May 7, 2:07 PM CDT	Frost Advisory	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more	18 hr
May 7, 2:08 PM CDT	Frost Advisory	ILX	Champaign, DeWitt, Knox, McLean, Marshall, Peoria and 5 more	18 hr
May 8, 10:30 AM CDT	River Flood Watch	DVN	Hancock, McDonough	48 hr
May 8, 2:19 PM CDT	Lake Wind Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	29 hr
May 8, 2:19 PM CDT	Wind Advisory	PAH	Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more	22 hr
May 8, 3:00 PM CDT	Small Craft Advisory	LOT		37 hr
May 9, 5:53 AM CDT	Special Weather Statement	ILX	Clay, Effingham, Jasper, Richland	52 min
May 9, 6:20 AM CDT	Special Weather Statement	PAH	Edwards, Wabash, Wayne	25 min
May 9, 6:27 AM CDT	Special Weather Statement	ILX	Crawford, Jasper, Lawrence, Richland	48 min
May 9, 9:28 AM CDT	Areal Flood Advisory	LOT	Cook, Grundy, Kankakee, LaSalle, Livingston, Will	6 hr
May 9, 10:41 AM CDT	River Flood Warning	LOT	Iroquois	54 hr
May 9, 10:43 AM CDT	River Flood Advisory	LOT	Cook	5 hr
May 9, 10:43 AM CDT	River Flood Advisory	LOT	Cook	21 hr
May 9, 11:11 AM CDT	River Flood Warning	IND	Clark, Crawford	8 days
May 9, 1:31 PM CDT	River Flood Warning	IND	Crawford, Lawrence	11 days
May 9, 2:18 PM CDT	Frost Advisory	LOT	Ford, Grundy, Iroquois, Kankakee, LaSalle, Livingston and 1 more	18 hr
May 9, 2:48 PM CDT	Frost Advisory	ILX	Cass, Champaign, Christian, Clark, Coles, Crawford and 22 more	16 hr
May 9, 7:37 PM CDT	River Flood Warning	IND	Crawford, Lawrence	11 days
May 9, 8:25 PM CDT	River Flood Warning	ILX	Fulton, Knox	19 hr
May 10, 8:00 AM CDT	River Flood Warning	ILX	Piatt	35 hr
May 10, 8:30 AM CDT	River Flood Advisory	LOT	Iroquois	23 hr
May 10, 12:51 PM CDT	River Flood Advisory	LOT	LaSalle	30 hr
May 10, 12:51 PM CDT	River Flood Advisory	LOT	Bureau, LaSalle, Putnam	60 hr
May 10, 2:23 PM CDT	Frost Advisory	LOT	Boone, Cook, DeKalb, DuPage, Kane, Lake and 3 more	18 hr
May 10, 2:28 PM CDT	Frost Advisory	DVN	Carroll, Jo Daviess, Stephenson	18 hr
May 10, 4:06 PM CDT	Special Weather Statement	LOT	LaSalle	54 min
May 10, 7:28 PM CDT	River Flood Warning	LOT	Bureau, LaSalle, Putnam	13 hr
May 11, 8:12 AM CDT	River Flood Advisory	LOT	Bureau, LaSalle, Putnam	35 hr
May 11, 2:11 PM CDT	Frost Advisory	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more	17 hr
May 11, 2:26 PM CDT	Frost Advisory	DVN	Bureau, Carroll, Henderson, Henry, Jo Daviess, McDonough and 6 more	17 hr
May 11, 2:34 PM CDT	Frost Advisory	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 29 more	16 hr
May 12, 9:22 AM CDT	River Flood Warning	ILX	Cass, Fulton, Mason	18 days
May 12, 2:41 PM CDT	Frost Advisory	LOT	DeKalb, Kane, Kankakee, Kendall, Lake, McHenry and 1 more	16 hr
May 16, 5:49 PM CDT	Mesoscale Discussion	SPC	Calhoun, Greene, Jersey, Pike	86 min
May 16, 8:15 PM CDT	River Flood Watch	DVN	Hancock, McDonough	25 hr
May 16, 8:16 PM CDT	River Flood Warning	ILX	Brown, Cass, Morgan, Schuyler	16 days
May 16, 9:36 PM CDT	Areal Flood Advisory	LSX	Greene, Jersey, Macoupin	3 hr
May 16, 10:36 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Montgomery	39 min
May 16, 10:40 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Effingham, Shelby	50 min
May 16, 10:58 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Montgomery	47 min
May 17, 12:41 AM CDT	Special Weather Statement	ILX	Clark, Cumberland	64 min
May 17, 1:38 AM CDT	Special Weather Statement	ILX	Clark	37 min
May 17, 12:09 PM CDT	River Flood Warning	IND	Clark, Crawford	6 days
May 17, 1:48 PM CDT	Special Weather Statement	ILX	Menard, Sangamon	42 min
May 17, 8:50 PM CDT	River Flood Warning	DVN	Hancock, McDonough	4 days
May 17, 9:22 PM CDT	Flash Flood Watch	ILX	Sangamon	13 hr
May 18, 3:23 PM CDT	River Flood Warning	LSX	Brown	6 days
May 18, 6:19 PM CDT	River Flood Warning	ILX	Fulton, Knox	71 hr
May 18, 7:29 PM CDT	River Flood Warning	LSX	Fayette	16 hr
May 18, 8:07 PM CDT	River Flood Warning	ILX	Fulton	4 days
May 19, 3:25 AM CDT	Small Craft Advisory	LOT		16 hr
May 19, 10:19 AM CDT	River Flood Warning	LSX	Calhoun, Greene, Jersey	47 hr
May 19, 10:19 AM CDT	River Flood Warning	LSX	Pike, Scott	7 days
May 20, 10:12 AM CDT	Lake Wind Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	9 hr
May 23, 11:46 PM CDT	Marine Dense Fog Advisory	LOT		10 hr
May 24, 1:43 AM CDT	Dense Fog Advisory	LOT	Cook, Lake	4 hr
May 24, 3:04 PM CDT	Small Craft Advisory	LOT		37 hr
May 25, 5:20 PM CDT	Special Weather Statement	ILX	Piatt	25 min
May 26, 3:07 AM CDT	Special Weather Statement	DVN	Mercer	38 min
May 26, 3:45 AM CDT	Special Weather Statement	DVN	Mercer, Rock Island	45 min
May 26, 3:46 AM CDT	Gale Watch	LOT		42 hr
May 26, 3:47 PM CDT	Small Craft Advisory	LOT		29 hr
May 26, 4:10 PM CDT	Special Weather Statement	PAH	Hamilton	35 min
May 26, 4:53 PM CDT	Special Weather Statement	PAH	Franklin	37 min
May 26, 5:44 PM CDT	Special Weather Statement	PAH	Saline	31 min
May 26, 6:37 PM CDT	Severe Thunderstorm Warning	PAH	Jackson	23 min
May 26, 9:19 PM CDT	Beach Hazards Statement	LOT	Cook, Lake	3 days
May 27, 3:54 AM CDT	Gale Warning	LOT		39 hr
May 27, 10:13 AM CDT	Special Weather Statement	ILX	Menard, Morgan, Sangamon	32 min
May 27, 11:04 AM CDT	Mesoscale Discussion	SPC	Bond, Calhoun, Christian, Clinton, Coles, Effingham and 18 more	86 min
May 27, 11:13 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	47 min
May 27, 11:14 AM CDT	Special Weather Statement	ILX	Cass, Morgan, Scott	46 min
May 27, 11:26 AM CDT	Severe Thunderstorm Watch	SPC	Bond, Calhoun, Cass, Champaign, Christian, Clark and 42 more	8 hr
May 27, 11:32 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	43 min
May 27, 11:50 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Macoupin, Madison, Saint Clair	55 min
May 27, 11:58 AM CDT	Severe Thunderstorm Warning	ILX	Morgan, Sangamon	62 min
May 27, 12:07 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin, Montgomery	38 min
May 27, 12:26 PM CDT	Tornado Warning	LSX	Macoupin, Madison	34 min
May 27, 12:39 PM CDT	Areal Flood Advisory	LSX	Calhoun, Madison	3 hr
May 27, 12:56 PM CDT	Tornado Warning	LSX	Bond, Macoupin, Madison, Montgomery	28 min
May 27, 12:57 PM CDT	Mesoscale Discussion	SPC	Bond, Christian, Clinton, Effingham, Fayette, Jersey and 12 more	93 min
May 27, 1:05 PM CDT	Severe Thunderstorm Warning	ILX	Christian, DeWitt, Logan, Macon, Sangamon, Shelby	55 min
May 27, 2:16 PM CDT	Areal Flood Advisory	LSX	Bond, Fayette	3 hr
May 27, 2:20 PM CDT	Mesoscale Discussion	SPC	Alexander, Bond, Clay, Clinton, Effingham, Fayette and 16 more	85 min
May 27, 2:23 PM CDT	Special Weather Statement	PAH	Alexander, Jackson, Union	52 min
May 27, 2:31 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Fayette, Marion	44 min
May 27, 2:46 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	29 min
May 27, 3:03 PM CDT	Severe Thunderstorm Warning	PAH	Wayne	42 min
May 27, 3:06 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper	54 min
May 27, 3:38 PM CDT	Mesoscale Discussion	SPC	Clay, Crawford, Edwards, Franklin, Hamilton, Jackson and 14 more	67 min
May 27, 3:47 PM CDT	Severe Thunderstorm Warning	ILX	Jasper, Richland	58 min
May 27, 4:31 PM CDT	Severe Thunderstorm Warning	PAH	Franklin, Hamilton, Jackson, Jefferson, Perry, Williamson	44 min
May 27, 4:43 PM CDT	Special Weather Statement	PAH	Johnson	32 min
May 27, 5:21 PM CDT	Mesoscale Discussion	SPC	Alexander, Gallatin, Hamilton, Hardin, Johnson, Massac and 6 more	114 min
May 27, 5:43 PM CDT	Areal Flood Advisory	PAH	Edwards, Franklin, Hamilton, Jefferson, Perry, Wabash and 1 more	2 hr
May 27, 6:23 PM CDT	Areal Flood Advisory	PAH	Alexander, Gallatin, Jackson, Johnson, Pulaski, Saline and 2 more	112 min
May 27, 7:44 PM CDT	Areal Flood Advisory	PAH	Massac, Pope	2 hr
May 27, 9:52 PM CDT	Gale Watch	LOT		5 hr
May 27, 9:52 PM CDT	Small Craft Advisory	LOT		48 hr
May 28, 2:27 AM CDT	Lake Wind Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	18 hr
May 28, 3:30 AM CDT	Frost Advisory	DVN	Carroll, Jo Daviess, Rock Island, Stephenson, Whiteside	28 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	44
Tornado Warning	14
Severe Thunderstorm Watch	5
Mesoscale Discussion	15
Special Weather Statement	43
Flooding
Flash Flood Warning	1
River Flood Warning	17
Flash Flood Watch	1
River Flood Watch	2
Areal Flood Advisory	8
River Flood Advisory	6
Cold
Frost Advisory	12
Wind and dust
Lake Wind Advisory	3
Wind Advisory	2
Fog and smoke
Dense Fog Advisory	1
Coast and beach
Beach Hazards Statement	1
Marine
Gale Warning	1
Gale Watch	2
Marine Dense Fog Advisory	1
Small Craft Advisory	8

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. Rebuilt daily.