Alert archive / Illinois / 2026
Weather alerts in Illinois, August 2026
441 weather alerts in August 2026, 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 August 2026. Tap one for its archive.
- Alerts
- 441
- Warnings
- 254
- Watches
- 32
- Advisories
- 72
- Busiest day
- August 10, 202652 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 |
|---|---|---|---|---|
| Jul 31, 11:52 PM CDT | Severe Thunderstorm Warning | PAH | Alexander, Pulaski | 23 min |
| Aug 1, 4:20 AM CDT | Areal Flood Advisory | LOT | Grundy, Kane, Kendall | 6 hr |
| Aug 1, 4:24 AM CDT | Areal Flood Advisory | LOT | Lee | 4 hr |
| Aug 1, 4:55 AM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Will | 6 hr |
| Aug 1, 6:09 AM CDT | Areal Flood Advisory | LOT | Cook, Will | 5 hr |
| Aug 1, 6:25 AM CDT | Flash Flood Warning | LOT | Kendall, Will | 3 hr |
| Aug 1, 7:41 AM CDT | Flash Flood Warning | LOT | Cook, DuPage | 92 min |
| Aug 1, 8:13 AM CDT | River Flood Warning | LOT | DuPage, Will | 6 hr |
| Aug 1, 8:13 AM CDT | River Flood Warning | LOT | Will | 20 hr |
| Aug 1, 9:09 AM CDT | Areal Flood Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 6 hr |
| Aug 1, 10:11 AM CDT | Flood Watch | ILX | Champaign, Douglas, Edgar, Vermilion | 11 hr |
| Aug 1, 10:22 AM CDT | Flood Watch | LOT | Cook, DuPage, Ford, Grundy, Iroquois, Kankakee and 3 more | 11 hr |
| Aug 1, 11:32 AM CDT | Areal Flood Advisory | LOT | Cook | 118 min |
| Aug 1, 1:46 PM CDT | Flash Flood Warning | ILX | Vermilion | 3 hr |
| Aug 1, 2:16 PM CDT | Areal Flood Advisory | LOT | Cook, Grundy, Kendall, Will | 5 hr |
| Aug 1, 2:44 PM CDT | River Flood Warning | LOT | Cook | 37 hr |
| Aug 1, 2:49 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Kendall, Will | 4 hr |
| Aug 1, 4:01 PM CDT | Areal Flood Advisory | LOT | Cook, Will | 3 hr |
| Aug 1, 4:50 PM CDT | River Flood Warning | LOT | Cook | 18 hr |
| Aug 1, 5:44 PM CDT | Areal Flood Warning | LOT | Cook, Will | 6 hr |
| Aug 1, 7:00 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Will | 6 hr |
| Aug 1, 10:56 PM CDT | River Flood Warning | LOT | DuPage, Will | 13 hr |
| Aug 1, 11:37 PM CDT | Areal Flood Warning | LOT | Cook, Will | 11 hr |
| Aug 5, 1:57 AM CDT | Flood Watch | LSX | Adams, Brown, Calhoun, Greene, Jersey, Madison and 3 more | 35 hr |
| Aug 5, 2:03 AM CDT | Flood Watch | DVN | Hancock, Henderson, McDonough, Mercer, Warren | 16 hr |
| Aug 5, 4:41 PM CDT | Special Marine Warning | LOT | 83 min | |
| Aug 7, 2:46 AM CDT | Dense Fog Advisory | LOT | Cook, Ford, Grundy, Iroquois, Kankakee, Livingston and 1 more | 6 hr |
| Aug 7, 2:48 AM CDT | Dense Fog Advisory | ILX | Champaign, Christian, Clark, Coles, Cumberland, DeWitt and 8 more | 5 hr |
| Aug 7, 1:40 PM CDT | Severe Thunderstorm Watch | SPC | Rock Island | 8 hr |
| Aug 7, 8:48 PM CDT | Mesoscale Discussion | SPC | Hancock | 87 min |
| Aug 7, 10:47 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 32 min |
| Aug 8, 2:05 AM CDT | Extreme Heat Watch | LSX | Clinton, Madison, Monroe, Randolph, Saint Clair, Washington | 23 hr |
| Aug 9, 12:29 AM CDT | Heat Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 4 days |
| Aug 9, 1:05 AM CDT | Heat Advisory | LSX | Adams, Bond, Brown, Calhoun, Fayette, Greene and 5 more | 8 days |
| Aug 9, 1:05 AM CDT | Extreme Heat Warning | LSX | Clinton, Madison, Marion, Monroe, Randolph, Saint Clair and 1 more | 8 days |
| Aug 9, 1:41 AM CDT | Heat Advisory | DVN | Hancock, Henderson, Henry, McDonough, Mercer, Rock Island and 1 more | 18 hr |
| Aug 9, 2:03 AM CDT | Heat Advisory | ILX | Cass, Fulton, Knox, Mason, Menard, Morgan and 3 more | 17 hr |
| Aug 9, 2:03 AM CDT | Heat Advisory | ILX | Cass, Christian, Clark, Clay, Crawford, Cumberland and 12 more | 41 hr |
| Aug 9, 9:20 AM CDT | Mesoscale Discussion | SPC | McHenry | 85 min |
| Aug 9, 9:46 AM CDT | Severe Thunderstorm Watch | SPC | Cook, DuPage, Lake, McHenry | 6 hr |
| Aug 9, 11:53 AM CDT | Special Marine Warning | LOT | 2 hr | |
| Aug 9, 12:43 PM CDT | Areal Flood Advisory | LOT | Lake, McHenry | 3 hr |
| Aug 9, 12:53 PM CDT | Special Marine Warning | LOT | 3 hr | |
| Aug 9, 1:03 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane | 57 min |
| Aug 9, 1:14 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage | 3 hr |
| Aug 9, 1:28 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage | 3 hr |
| Aug 9, 1:36 PM CDT | Severe Thunderstorm Warning | LOT | DuPage, Kane, Kendall, Will | 54 min |
| Aug 9, 1:57 PM CDT | Mesoscale Discussion | SPC | Cook, DuPage | 93 min |
| Aug 9, 2:10 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Will | 3 hr |
| Aug 9, 2:51 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 24 min |
| Aug 9, 2:51 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Will | 24 min |
| Aug 9, 3:14 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 76 min |
| Aug 9, 3:27 PM CDT | Areal Flood Advisory | LOT | Cook | 3 hr |
| Aug 9, 5:03 PM CDT | Flood Watch | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 10 hr |
| Aug 9, 5:18 PM CDT | Special Marine Warning | LOT | 42 min | |
| Aug 9, 8:14 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 29 more | 2 hr |
| Aug 9, 8:41 PM CDT | Severe Thunderstorm Warning | LOT | Lee | 64 min |
| Aug 9, 8:43 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more | 7 hr |
| Aug 9, 8:57 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry | 33 min |
| Aug 9, 9:00 PM CDT | Tornado Warning | DVN | Bureau, Henry | 29 min |
| Aug 9, 9:09 PM CDT | Areal Flood Advisory | LOT | Lee | 4 hr |
| Aug 9, 9:24 PM CDT | Tornado Warning | DVN | Bureau, Putnam | 28 min |
| Aug 9, 9:33 PM CDT | Tornado Warning | DVN | Henry | 42 min |
| Aug 9, 9:39 PM CDT | Severe Thunderstorm Warning | LOT | Lee | 66 min |
| Aug 9, 9:49 PM CDT | Tornado Warning | LOT | Lee | 41 min |
| Aug 9, 9:57 PM CDT | Tornado Warning | ILX | Knox, Peoria | 48 min |
| Aug 9, 10:05 PM CDT | Tornado Warning | DVN | Bureau | 55 min |
| Aug 9, 10:10 PM CDT | Flash Flood Warning | LOT | Lee | 3 hr |
| Aug 9, 10:16 PM CDT | Areal Flood Advisory | LOT | DeKalb, LaSalle | 78 min |
| Aug 9, 10:22 PM CDT | Tornado Warning | ILX | Marshall, Peoria, Stark | 27 min |
| Aug 9, 10:23 PM CDT | Tornado Warning | LOT | Lee | 26 min |
| Aug 9, 10:46 PM CDT | Tornado Warning | ILX | Peoria | 24 min |
| Aug 9, 10:49 PM CDT | Areal Flood Advisory | LOT | LaSalle | 45 min |
| Aug 9, 10:53 PM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, Cook, DeKalb, DuPage, Grundy and 18 more | 2 hr |
| Aug 9, 11:10 PM CDT | Special Marine Warning | LOT | 95 min | |
| Aug 9, 11:22 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Lake | 38 min |
| Aug 9, 11:22 PM CDT | Tornado Warning | LOT | LaSalle | 23 min |
| Aug 9, 11:23 PM CDT | Areal Flood Advisory | LOT | Grundy, Kendall, LaSalle, Livingston | 3 hr |
| Aug 9, 11:32 PM CDT | Areal Flood Advisory | LOT | DeKalb, LaSalle | 2 hr |
| Aug 9, 11:35 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, LaSalle, Livingston | 70 min |
| Aug 9, 11:36 PM CDT | Tornado Warning | LOT | LaSalle | 24 min |
| Aug 9, 11:47 PM CDT | Flash Flood Warning | LOT | Grundy, LaSalle, Livingston | 3 hr |
| Aug 9, 11:54 PM CDT | Special Marine Warning | LOT | 96 min | |
| Aug 9, 11:59 PM CDT | Tornado Warning | LOT | Grundy, LaSalle | 17 min |
| Aug 10, 12:01 AM CDT | Flash Flood Warning | LOT | LaSalle | 2 hr |
| Aug 10, 12:36 AM CDT | Severe Thunderstorm Warning | LOT | Ford, Grundy, Iroquois, Kankakee, Livingston | 69 min |
| Aug 10, 12:39 AM CDT | Tornado Warning | LOT | Ford, Kankakee, Livingston | 36 min |
| Aug 10, 12:40 AM CDT | Special Marine Warning | LOT | 45 min | |
| Aug 10, 12:44 AM CDT | Areal Flood Advisory | LOT | Ford, Iroquois, Kankakee, Livingston | 2 hr |
| Aug 10, 12:50 AM CDT | Extreme Heat Warning | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 7 days |
| Aug 10, 12:54 AM CDT | Tornado Warning | LOT | Livingston | 36 min |
| Aug 10, 1:05 AM CDT | Areal Flood Advisory | LOT | Grundy, Kendall, LaSalle, Lee | 8 hr |
| Aug 10, 1:18 AM CDT | Flash Flood Warning | LOT | Ford, Kankakee, Livingston | 91 min |
| Aug 10, 1:20 AM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 55 min |
| Aug 10, 1:28 AM CDT | Tornado Warning | LOT | Iroquois | 16 min |
| Aug 10, 1:31 AM CDT | Tornado Warning | LOT | Ford, Livingston | 29 min |
| Aug 10, 1:42 AM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Livingston | 93 min |
| Aug 10, 1:52 AM CDT | Flash Flood Warning | LOT | Ford, Iroquois, Kankakee | 58 min |
| Aug 10, 1:56 AM CDT | Areal Flood Advisory | LOT | Ford, Iroquois, Livingston | 58 min |
| Aug 10, 2:15 AM CDT | Mesoscale Discussion | SPC | Iroquois, Kankakee | 2 hr |
| Aug 10, 2:32 AM CDT | Areal Flood Warning | LOT | Grundy, LaSalle, Livingston | 3 hr |
| Aug 10, 2:48 AM CDT | Areal Flood Advisory | LOT | Ford, Grundy, Iroquois, Kankakee, Livingston | 7 hr |
| Aug 10, 12:47 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, DuPage, Grundy and 14 more | 2 hr |
| Aug 10, 1:57 PM CDT | Heat Advisory | DVN | Hancock, Henderson, McDonough, Mercer, Warren | 30 hr |
| Aug 10, 2:34 PM CDT | Heat Advisory | ILX | Cass, Christian, Clark, Clay, Coles, Crawford and 16 more | 29 hr |
| Aug 10, 5:15 PM CDT | Mesoscale Discussion | SPC | Cook, DeKalb, DuPage, Grundy, Kane, Kankakee and 3 more | 2 hr |
| Aug 10, 6:21 PM CDT | Severe Thunderstorm Watch | SPC | Cook, DuPage, Ford, Grundy, Iroquois, Kankakee and 2 more | 7 hr |
| Aug 10, 9:07 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Jo Daviess, Lee, Ogle, Stephenson and 2 more | 113 min |
| Aug 11, 12:30 AM CDT | Special Marine Warning | LOT | 67 min | |
| Aug 11, 3:11 AM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry | 51 min |
| Aug 11, 3:34 AM CDT | Special Marine Warning | LOT | 86 min | |
| Aug 11, 3:49 AM CDT | Severe Thunderstorm Warning | LOT | Lake, McHenry | 27 min |
| Aug 11, 7:22 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Champaign, Cook, DeKalb and 32 more | 6 hr |
| Aug 11, 8:15 AM CDT | Severe Thunderstorm Warning | DVN | Carroll, Jo Daviess, Stephenson | 60 min |
| Aug 11, 8:20 AM CDT | Severe Thunderstorm Warning | DVN | Rock Island, Whiteside | 43 min |
| Aug 11, 8:33 AM CDT | Severe Thunderstorm Warning | DVN | Carroll, Whiteside | 72 min |
| Aug 11, 8:38 AM CDT | Tornado Warning | DVN | Rock Island, Whiteside | 23 min |
| Aug 11, 8:43 AM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess, Stephenson | 51 min |
| Aug 11, 8:45 AM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle, Winnebago | 90 min |
| Aug 11, 8:54 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Rock Island | 81 min |
| Aug 11, 9:00 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 27 more | 2 hr |
| Aug 11, 9:22 AM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, LaSalle | 53 min |
| Aug 11, 9:32 AM CDT | Areal Flood Advisory | LOT | Boone, DeKalb, LaSalle, Lee, Ogle, Winnebago | 4 hr |
| Aug 11, 9:34 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam | 42 min |
| Aug 11, 9:38 AM CDT | Severe Thunderstorm Warning | LOT | Kane, McHenry | 67 min |
| Aug 11, 9:44 AM CDT | Severe Thunderstorm Warning | ILX | Marshall | 46 min |
| Aug 11, 9:48 AM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kendall, LaSalle, Livingston | 72 min |
| Aug 11, 9:59 AM CDT | Areal Flood Advisory | LOT | Grundy, Kane, Kendall | 4 hr |
| Aug 11, 10:09 AM CDT | Special Marine Warning | LOT | 2 hr | |
| Aug 11, 10:10 AM CDT | Tornado Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 50 min |
| Aug 11, 10:17 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 58 min |
| Aug 11, 10:20 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kankakee, Will | 55 min |
| Aug 11, 10:27 AM CDT | Tornado Warning | LOT | Grundy, Kankakee, Kendall, Will | 37 min |
| Aug 11, 10:29 AM CDT | Tornado Warning | LOT | Cook, DuPage | 46 min |
| Aug 11, 10:36 AM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Kankakee, Will | 3 hr |
| Aug 11, 10:36 AM CDT | Tornado Warning | LOT | Cook, Will | 28 min |
| Aug 11, 10:49 AM CDT | Severe Thunderstorm Warning | LOT | Kankakee, Will | 56 min |
| Aug 11, 11:06 AM CDT | Areal Flood Advisory | LOT | Kankakee | 3 hr |
| Aug 11, 11:10 AM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 65 min |
| Aug 11, 11:24 AM CDT | Lakeshore Flood Warning | LOT | Cook | 6 hr |
| Aug 11, 11:39 AM CDT | Areal Flood Advisory | LOT | Lake | 3 hr |
| Aug 11, 1:56 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 34 min |
| Aug 11, 1:57 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Vermilion | 63 min |
| Aug 11, 2:28 PM CDT | Mesoscale Discussion | SPC | Champaign, Douglas, Edgar, Vermilion | 2 hr |
| Aug 11, 2:50 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, McLean, Piatt | 40 min |
| Aug 11, 3:17 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Piatt | 43 min |
| Aug 11, 3:25 PM CDT | Tornado Warning | ILX | Champaign, Douglas, Piatt | 50 min |
| Aug 11, 3:52 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Douglas, Edgar, Vermilion | 53 min |
| Aug 11, 4:22 PM CDT | Severe Thunderstorm Warning | ILX | Clark, Edgar | 38 min |
| Aug 11, 5:24 PM CDT | Mesoscale Discussion | SPC | Clark, Crawford | 2 hr |
| Aug 11, 5:30 PM CDT | Severe Thunderstorm Warning | ILX | Clark | 45 min |
| Aug 11, 8:04 PM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, Cook, DeKalb, DuPage, Ford and 21 more | 2 hr |
| Aug 11, 8:48 PM CDT | River Flood Warning | LOT | Cook | 43 hr |
| Aug 12, 1:18 AM CDT | Heat Advisory | DVN | Hancock, Henderson, McDonough, Warren | 12 hr |
| Aug 12, 1:59 AM CDT | Heat Advisory | ILX | Cass, Christian, Clay, Crawford, Effingham, Jasper and 7 more | 18 hr |
| Aug 12, 6:09 AM CDT | Severe Thunderstorm Warning | DVN | Rock Island | 66 min |
| Aug 12, 6:41 AM CDT | Severe Thunderstorm Watch | SPC | Bureau, Champaign, Cook, DeKalb, DeWitt, DuPage and 31 more | 6 hr |
| Aug 12, 6:53 AM CDT | Severe Thunderstorm Warning | DVN | Henry, Rock Island | 67 min |
| Aug 12, 7:18 AM CDT | Flash Flood Warning | DVN | Rock Island | 94 min |
| Aug 12, 7:22 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Whiteside | 53 min |
| Aug 12, 7:27 AM CDT | Severe Thunderstorm Warning | DVN | Henderson | 63 min |
| Aug 12, 7:44 AM CDT | Severe Thunderstorm Warning | ILX | Knox | 61 min |
| Aug 12, 7:49 AM CDT | Severe Thunderstorm Warning | DVN | Henry, Mercer | 41 min |
| Aug 12, 7:53 AM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle | 66 min |
| Aug 12, 7:54 AM CDT | Severe Thunderstorm Warning | DVN | Hancock | 36 min |
| Aug 12, 8:11 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam, Whiteside | 49 min |
| Aug 12, 8:15 AM CDT | Tornado Warning | DVN | Bureau | 28 min |
| Aug 12, 8:20 AM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson, McDonough, Warren | 55 min |
| Aug 12, 8:23 AM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 66 min |
| Aug 12, 8:25 AM CDT | Severe Thunderstorm Warning | ILX | Marshall, Stark | 53 min |
| Aug 12, 8:31 AM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee, Ogle | 57 min |
| Aug 12, 8:37 AM CDT | Tornado Warning | LOT | LaSalle | 38 min |
| Aug 12, 9:03 AM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kane, Kendall | 46 min |
| Aug 12, 9:04 AM CDT | Mesoscale Discussion | SPC | Bureau, Champaign, DeWitt, Douglas, Edgar, Ford and 20 more | 116 min |
| Aug 12, 9:06 AM CDT | Areal Flood Advisory | LOT | DeKalb, Grundy, Kendall, LaSalle, Livingston | 3 hr |
| Aug 12, 9:26 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kankakee, Will | 64 min |
| Aug 12, 9:27 AM CDT | Special Marine Warning | LOT | 2 hr | |
| Aug 12, 9:29 AM CDT | Areal Flood Advisory | LOT | Cook, Kankakee, Will | 3 hr |
| Aug 12, 9:37 AM CDT | Flash Flood Warning | LOT | Grundy, Kankakee, Kendall, LaSalle, Will | 3 hr |
| Aug 12, 10:14 AM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee | 61 min |
| Aug 12, 10:35 AM CDT | Severe Thunderstorm Warning | ILX | Vermilion | 40 min |
| Aug 12, 10:57 AM CDT | Special Weather Statement | DVN | Mercer | 33 min |
| Aug 12, 11:24 AM CDT | Special Weather Statement | DVN | Mercer | 36 min |
| Aug 12, 11:37 AM CDT | Special Weather Statement | DVN | Warren | 23 min |
| Aug 12, 11:47 AM CDT | Areal Flood Advisory | ILX | Knox, Peoria, Stark | 3 hr |
| Aug 12, 12:12 PM CDT | Mesoscale Discussion | SPC | Cass, Champaign, Christian, Clark, Coles, Cumberland and 25 more | 63 min |
| Aug 12, 12:17 PM CDT | Areal Flood Advisory | LOT | Cook, Grundy, Kankakee, Kendall, LaSalle, Will | 118 min |
| Aug 12, 1:39 PM CDT | Severe Thunderstorm Warning | ILX | Crawford, Lawrence | 12 min |
| Aug 12, 2:24 PM CDT | Severe Thunderstorm Watch | SPC | Edwards, Wabash | 5 hr |
| Aug 12, 3:58 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 47 min |
| Aug 12, 4:33 PM CDT | Mesoscale Discussion | SPC | Alexander, Clinton, Franklin, Gallatin, Hamilton, Hardin and 17 more | 117 min |
| Aug 12, 4:44 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 29 min |
| Aug 12, 5:16 PM CDT | Severe Thunderstorm Warning | PAH | Franklin, Hamilton, Jefferson | 44 min |
| Aug 12, 6:12 PM CDT | Areal Flood Advisory | PAH | Franklin, Hamilton, Jefferson | 3 hr |
| Aug 12, 6:43 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 62 min |
| Aug 12, 8:34 PM CDT | Special Weather Statement | PAH | Alexander, Johnson, Massac, Pope, Pulaski | 56 min |
| Aug 12, 9:04 PM CDT | Severe Thunderstorm Warning | PAH | Alexander, Johnson, Massac, Pulaski | 41 min |
| Aug 12, 9:38 PM CDT | Special Weather Statement | PAH | Massac | 52 min |
| Aug 13, 12:32 AM CDT | Heat Advisory | ILX | Christian, Clark, Clay, Crawford, Cumberland, Effingham and 7 more | 4 days |
| Aug 13, 2:02 AM CDT | Flood Watch | ILX | Champaign, Clark, Coles, Cumberland, DeWitt, Douglas and 13 more | 36 hr |
| Aug 13, 2:08 AM CDT | Flood Watch | LOT | DeKalb, Ford, Grundy, Iroquois, Kankakee, Kendall and 5 more | 32 hr |
| Aug 13, 2:22 AM CDT | Flood Watch | DVN | Bureau, Carroll, Hancock, Henderson, Henry, McDonough and 5 more | 56 hr |
| Aug 13, 2:29 AM CDT | Dense Fog Advisory | ILX | Champaign, DeWitt, Douglas, Edgar, Fulton, Knox and 11 more | 7 hr |
| Aug 13, 2:35 AM CDT | Dense Fog Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 6 hr |
| Aug 13, 2:42 AM CDT | Dense Fog Advisory | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 10 more | 6 hr |
| Aug 13, 5:47 AM CDT | Severe Thunderstorm Watch | SPC | Hancock, Henderson, McDonough, Mercer, Warren | 6 hr |
| Aug 13, 10:28 AM CDT | Mesoscale Discussion | SPC | Champaign, DeWitt, Ford, Fulton, Hancock, Henderson and 21 more | 3 hr |
| Aug 13, 10:35 AM CDT | Special Weather Statement | DVN | Henderson, Mercer, Warren | 55 min |
| Aug 13, 11:08 AM CDT | Special Weather Statement | ILX | Knox | 52 min |
| Aug 13, 11:13 AM CDT | Special Weather Statement | DVN | Henry, Mercer | 47 min |
| Aug 13, 11:22 AM CDT | River Flood Warning | IND | Crawford, Lawrence | 17 days |
| Aug 13, 11:22 AM CDT | River Flood Warning | IND | Clark, Crawford | 14 days |
| Aug 13, 11:22 AM CDT | River Flood Warning | IND | Crawford, Lawrence | 18 days |
| Aug 13, 12:00 PM CDT | Special Weather Statement | ILX | Fulton, Knox, Marshall, Peoria, Stark, Tazewell | 45 min |
| Aug 13, 12:04 PM CDT | Special Weather Statement | DVN | Stark | 56 min |
| Aug 13, 12:09 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Logan, Mason, Peoria, Tazewell | 66 min |
| Aug 13, 12:30 PM CDT | Severe Thunderstorm Watch | SPC | Champaign, Coles, DeWitt, Douglas, Edgar, Ford and 11 more | 6 hr |
| Aug 13, 12:31 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Peoria, Tazewell, Woodford | 44 min |
| Aug 13, 12:50 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Logan, McLean, Macon, Woodford | 55 min |
| Aug 13, 1:25 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, DeWitt, McLean, Piatt, Vermilion | 65 min |
| Aug 13, 1:28 PM CDT | Severe Thunderstorm Warning | LOT | Ford | 47 min |
| Aug 13, 1:34 PM CDT | Areal Flood Advisory | ILX | McLean, Woodford | 2 hr |
| Aug 13, 1:56 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Douglas, Edgar, Piatt, Vermilion | 64 min |
| Aug 13, 2:10 PM CDT | Flash Flood Warning | ILX | Champaign, DeWitt, McLean, Piatt | 2 hr |
| Aug 13, 2:22 PM CDT | Severe Thunderstorm Warning | ILX | Vermilion | 39 min |
| Aug 13, 2:47 PM CDT | Flash Flood Warning | ILX | Champaign, Vermilion | 2 hr |
| Aug 13, 2:59 PM CDT | Severe Thunderstorm Warning | ILX | Edgar, Vermilion | 22 min |
| Aug 13, 3:22 PM CDT | Mesoscale Discussion | SPC | Edgar | 83 min |
| Aug 13, 5:10 PM CDT | Severe Thunderstorm Warning | ILX | Crawford | 37 min |
| Aug 13, 11:03 PM CDT | Mesoscale Discussion | SPC | Bureau, Cass, Champaign, Clark, Coles, DeWitt and 33 more | 117 min |
| Aug 13, 11:11 PM CDT | Special Weather Statement | ILX | Peoria | 34 min |
| Aug 13, 11:21 PM CDT | Flash Flood Warning | ILX | Knox, Marshall, Peoria, Stark, Woodford | 4 hr |
| Aug 13, 11:32 PM CDT | Special Weather Statement | ILX | Woodford | 43 min |
| Aug 13, 11:35 PM CDT | Areal Flood Advisory | LOT | Grundy, LaSalle | 3 hr |
| Aug 13, 11:56 PM CDT | Special Weather Statement | ILX | Peoria | 34 min |
| Aug 14, 12:05 AM CDT | Severe Thunderstorm Warning | ILX | Champaign, Vermilion | 55 min |
| Aug 14, 12:06 AM CDT | Areal Flood Advisory | LOT | Ford, Iroquois | 3 hr |
| Aug 14, 12:18 AM CDT | Severe Thunderstorm Warning | ILX | Peoria, Tazewell, Woodford | 57 min |
| Aug 14, 12:40 AM CDT | Flash Flood Warning | ILX | Vermilion | 12 hr |
| Aug 14, 12:48 AM CDT | Flash Flood Warning | LOT | Ford, Iroquois | 3 hr |
| Aug 14, 1:07 AM CDT | Special Weather Statement | ILX | Vermilion | 23 min |
| Aug 14, 1:09 AM CDT | Areal Flood Advisory | LOT | Ford, Iroquois, Livingston | 5 hr |
| Aug 14, 1:12 AM CDT | Severe Thunderstorm Warning | ILX | McLean | 52 min |
| Aug 14, 1:21 AM CDT | Flash Flood Warning | LOT | Ford, Iroquois | 6 hr |
| Aug 14, 1:38 AM CDT | Flash Flood Warning | ILX | Champaign, McLean | 7 hr |
| Aug 14, 2:33 AM CDT | Severe Thunderstorm Warning | ILX | Champaign, Piatt, Vermilion | 46 min |
| Aug 14, 2:59 AM CDT | Flash Flood Warning | ILX | Champaign, Vermilion | 6 hr |
| Aug 14, 3:44 AM CDT | Flash Flood Warning | DVN | Henderson, Warren | 6 hr |
| Aug 14, 4:07 AM CDT | Flash Flood Warning | ILX | Fulton, Knox, Peoria, Tazewell | 6 hr |
| Aug 14, 4:59 AM CDT | Flash Flood Warning | DVN | Henderson, Mercer, Warren | 6 hr |
| Aug 14, 5:47 AM CDT | Flash Flood Warning | ILX | DeWitt, Piatt | 3 hr |
| Aug 14, 6:47 AM CDT | Flash Flood Warning | ILX | Coles, Douglas, Edgar | 11 hr |
| Aug 14, 7:13 AM CDT | Areal Flood Warning | LOT | Ford, Iroquois | 15 hr |
| Aug 14, 8:14 AM CDT | Flash Flood Warning | ILX | Clark, Coles, Cumberland, Edgar | 3 hr |
| Aug 14, 8:16 AM CDT | River Flood Warning | LOT | Cook | 42 hr |
| Aug 14, 9:25 AM CDT | River Flood Warning | ILX | Vermilion | 4 days |
| Aug 14, 9:29 AM CDT | River Flood Watch | DVN | Hancock, McDonough | 22 hr |
| Aug 14, 10:00 AM CDT | Flash Flood Warning | ILX | Cass, Fulton, Logan, Mason, Menard, Sangamon | 4 hr |
| Aug 14, 10:20 AM CDT | River Flood Warning | ILX | Fulton, Knox | 4 days |
| Aug 14, 10:32 AM CDT | Areal Flood Advisory | ILX | Macon | 3 hr |
| Aug 14, 12:01 PM CDT | Flood Watch | LOT | Cook, DeKalb, DuPage, Ford, Grundy, Iroquois and 8 more | 22 hr |
| Aug 14, 12:15 PM CDT | Flood Watch | ILX | Champaign, DeWitt, Douglas, Edgar, Fulton, Knox and 10 more | 22 hr |
| Aug 14, 3:09 PM CDT | River Flood Warning | ILX | Fulton | 5 days |
| Aug 14, 9:48 PM CDT | Flood Watch | LSX | Adams, Brown | 12 hr |
| Aug 14, 10:15 PM CDT | River Flood Warning | LOT | Bureau, LaSalle, Putnam | 5 days |
| Aug 14, 11:11 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 64 min |
| Aug 14, 11:42 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Fulton, Hancock, Henderson and 8 more | 2 hr |
| Aug 14, 11:56 PM CDT | Flash Flood Warning | ILX | Fulton, Knox, Mason, Peoria, Tazewell, Woodford | 7 hr |
| Aug 15, 12:02 AM CDT | Severe Thunderstorm Warning | DVN | Hancock | 58 min |
| Aug 15, 12:31 AM CDT | Severe Thunderstorm Warning | DVN | Hancock, McDonough | 74 min |
| Aug 15, 12:58 AM CDT | Flash Flood Warning | DVN | Hancock | 6 hr |
| Aug 15, 1:09 AM CDT | Flash Flood Warning | ILX | McLean | 6 hr |
| Aug 15, 1:23 AM CDT | Severe Thunderstorm Warning | ILX | Fulton, Mason | 67 min |
| Aug 15, 1:50 AM CDT | Flash Flood Warning | LOT | Ford, Iroquois | 6 hr |
| Aug 15, 1:51 AM CDT | Severe Thunderstorm Warning | ILX | Fulton | 24 min |
| Aug 15, 1:55 AM CDT | Flash Flood Warning | DVN | Henderson, McDonough, Warren | 6 hr |
| Aug 15, 2:19 AM CDT | Flash Flood Warning | ILX | McLean | 5 hr |
| Aug 15, 2:23 AM CDT | Severe Thunderstorm Warning | ILX | Peoria, Tazewell | 38 min |
| Aug 15, 2:36 AM CDT | Flash Flood Warning | ILX | McLean | 6 hr |
| Aug 15, 3:19 AM CDT | Flash Flood Warning | DVN | Henderson | 5 hr |
| Aug 15, 3:23 AM CDT | Flash Flood Warning | ILX | Champaign | 5 hr |
| Aug 15, 3:23 AM CDT | Flash Flood Warning | LOT | Ford | 5 hr |
| Aug 15, 3:43 AM CDT | Severe Thunderstorm Warning | ILX | Cass, Fulton, Mason, Menard, Morgan, Schuyler and 1 more | 62 min |
| Aug 15, 3:54 AM CDT | Flash Flood Warning | ILX | Vermilion | 4 hr |
| Aug 15, 4:29 AM CDT | Special Weather Statement | ILX | Logan, Menard, Sangamon | 31 min |
| Aug 15, 5:33 AM CDT | Areal Flood Advisory | ILX | Morgan | 3 hr |
| Aug 15, 5:48 AM CDT | Flash Flood Warning | ILX | Champaign, Vermilion | 8 hr |
| Aug 15, 6:24 AM CDT | Special Weather Statement | ILX | Champaign, Piatt, Vermilion | 36 min |
| Aug 15, 6:37 AM CDT | Areal Flood Warning | ILX | Fulton, Knox, Mason, Peoria, Tazewell, Woodford | 27 hr |
| Aug 15, 7:14 AM CDT | River Flood Warning | DVN | Hancock, McDonough | 4 days |
| Aug 15, 7:33 AM CDT | Areal Flood Warning | ILX | McLean | 65 min |
| Aug 15, 7:40 AM CDT | Areal Flood Warning | ILX | McLean | 26 hr |
| Aug 15, 8:04 AM CDT | Flash Flood Warning | ILX | McLean | 5 hr |
| Aug 15, 8:04 AM CDT | Areal Flood Warning | LOT | Ford | 9 hr |
| Aug 15, 8:38 AM CDT | Flash Flood Warning | ILX | McLean | 4 hr |
| Aug 15, 9:12 AM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Kane, Kendall, Will | 3 hr |
| Aug 15, 10:11 AM CDT | River Flood Warning | ILX | Cass, Fulton, Mason | 13 days |
| Aug 15, 10:12 AM CDT | River Flood Warning | ILX | Brown, Cass, Morgan, Schuyler | 14 days |
| Aug 15, 10:19 AM CDT | River Flood Warning | ILX | Piatt | 7 days |
| Aug 15, 12:40 PM CDT | Areal Flood Warning | ILX | McLean | 21 hr |
| Aug 15, 1:40 PM CDT | Areal Flood Warning | ILX | Champaign, Vermilion | 46 hr |
| Aug 15, 1:46 PM CDT | River Flood Warning | ILX | McLean, Tazewell, Woodford | 20 hr |
| Aug 15, 4:02 PM CDT | Mesoscale Discussion | SPC | Adams, Hancock, Henderson | 118 min |
| Aug 15, 5:41 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 34 min |
| Aug 15, 6:39 PM CDT | Flood Watch | LOT | Cook, Ford, Grundy, Iroquois, Kankakee, Kendall and 3 more | 13 hr |
| Aug 15, 7:12 PM CDT | Flood Watch | ILX | Champaign, DeWitt, Fulton, Knox, McLean, Marshall and 6 more | 13 hr |
| Aug 15, 8:42 PM CDT | River Flood Warning | LOT | Iroquois | 57 hr |
| Aug 15, 8:43 PM CDT | Special Weather Statement | DVN | Mercer, Rock Island | 47 min |
| Aug 15, 9:04 PM CDT | Special Weather Statement | DVN | Rock Island | 41 min |
| Aug 15, 9:23 PM CDT | Flash Flood Warning | DVN | Mercer | 6 hr |
| Aug 15, 9:44 PM CDT | Special Weather Statement | DVN | Henry, Rock Island | 46 min |
| Aug 15, 9:50 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Mercer, Rock Island, Whiteside | 55 min |
| Aug 15, 9:57 PM CDT | Special Weather Statement | ILX | Knox | 33 min |
| Aug 15, 10:04 PM CDT | Special Weather Statement | DVN | Warren | 26 min |
| Aug 15, 10:11 PM CDT | Special Weather Statement | ILX | Stark | 34 min |
| Aug 15, 10:21 PM CDT | Special Weather Statement | DVN | Bureau, Putnam | 39 min |
| Aug 16, 12:44 AM CDT | Special Marine Warning | LOT | 109 min | |
| Aug 16, 4:31 AM CDT | Dense Fog Advisory | DVN | Rock Island, Whiteside | 4 hr |
| Aug 16, 6:18 AM CDT | Special Weather Statement | ILX | Christian | 27 min |
| Aug 16, 11:10 AM CDT | Special Weather Statement | DVN | Hancock, McDonough | 65 min |
| Aug 16, 11:59 AM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 46 min |
| Aug 16, 12:01 PM CDT | Special Weather Statement | DVN | McDonough | 44 min |
| Aug 16, 12:12 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Christian, Fulton, Hancock and 10 more | 93 min |
| Aug 16, 12:25 PM CDT | Special Weather Statement | ILX | Morgan, Scott | 50 min |
| Aug 16, 12:59 PM CDT | Special Weather Statement | ILX | Morgan, Sangamon | 46 min |
| Aug 16, 1:25 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Logan, Menard, Sangamon | 35 min |
| Aug 16, 1:55 PM CDT | Severe Thunderstorm Warning | ILX | Christian, DeWitt, Logan, Macon | 50 min |
| Aug 16, 2:26 PM CDT | Special Weather Statement | ILX | Douglas, Piatt | 34 min |
| Aug 16, 2:55 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Coles, Douglas, Edgar, Vermilion | 50 min |
| Aug 16, 3:11 PM CDT | Mesoscale Discussion | SPC | Calhoun, Clinton, Jackson, Jersey, Macoupin, Madison and 5 more | 2 hr |
| Aug 16, 3:25 PM CDT | Severe Thunderstorm Warning | ILX | Clark, Edgar, Vermilion | 50 min |
| Aug 16, 8:27 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clinton, Jackson, Jersey, Macoupin and 6 more | 93 min |
| Aug 16, 9:17 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Monroe, Saint Clair | 35 min |
| Aug 16, 11:31 PM CDT | Areal Flood Advisory | LSX | Washington | 3 hr |
| Aug 16, 11:32 PM CDT | Areal Flood Advisory | PAH | Perry | 118 min |
| Aug 17, 12:09 AM CDT | Areal Flood Advisory | PAH | Franklin, Hamilton, Jefferson, White | 104 min |
| Aug 17, 12:59 AM CDT | Areal Flood Advisory | PAH | White | 98 min |
| Aug 17, 2:14 AM CDT | River Flood Warning | IND | Lawrence, Wabash | 13 days |
| Aug 17, 2:57 AM CDT | River Flood Warning | ILX | McLean, Tazewell, Woodford | 31 hr |
| Aug 18, 2:48 PM CDT | Severe Thunderstorm Watch | SPC | Jo Daviess, Stephenson | 6 hr |
| Aug 18, 5:29 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Jo Daviess, McHenry, Ogle, Stephenson and 1 more | 2 hr |
| Aug 18, 7:36 PM CDT | Special Marine Warning | LOT | 114 min | |
| Aug 18, 9:18 PM CDT | Special Marine Warning | LOT | 86 min | |
| Aug 19, 2:35 AM CDT | Flood Watch | ILX | Champaign, DeWitt, Fulton, Knox, Logan, McLean and 10 more | 22 hr |
| Aug 19, 2:56 AM CDT | Flood Watch | LOT | Ford, Iroquois, Livingston | 22 hr |
| Aug 19, 2:38 PM CDT | Special Weather Statement | DVN | Mercer | 52 min |
| Aug 19, 3:25 PM CDT | Special Weather Statement | DVN | Henderson, Warren | 65 min |
| Aug 19, 4:23 PM CDT | Special Weather Statement | DVN | Henderson, Warren | 52 min |
| Aug 19, 4:36 PM CDT | Flash Flood Warning | DVN | Henderson | 2 hr |
| Aug 19, 4:52 PM CDT | Mesoscale Discussion | SPC | Champaign, DeWitt, Ford, Fulton, Grundy, Henderson and 14 more | 83 min |
| Aug 19, 5:12 PM CDT | Special Weather Statement | DVN | Hancock, Henderson, McDonough, Warren | 63 min |
| Aug 19, 5:36 PM CDT | Special Weather Statement | DVN | Mercer | 39 min |
| Aug 19, 5:43 PM CDT | Flash Flood Warning | ILX | Knox | 3 hr |
| Aug 19, 6:06 PM CDT | Flash Flood Warning | DVN | Mercer | 2 hr |
| Aug 19, 6:10 PM CDT | Special Weather Statement | DVN | McDonough | 65 min |
| Aug 19, 6:13 PM CDT | Flash Flood Warning | ILX | Vermilion | 3 hr |
| Aug 19, 6:34 PM CDT | Severe Thunderstorm Warning | ILX | Fulton | 56 min |
| Aug 19, 6:36 PM CDT | Flash Flood Warning | DVN | Mercer | 113 min |
| Aug 19, 6:52 PM CDT | Flash Flood Warning | ILX | Tazewell, Woodford | 6 hr |
| Aug 19, 6:58 PM CDT | Flash Flood Warning | ILX | Champaign | 2 hr |
| Aug 19, 7:13 PM CDT | Flash Flood Warning | ILX | Marshall, Stark | 2 hr |
| Aug 19, 8:23 PM CDT | Flood Watch | PAH | Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more | 11 hr |
| Aug 19, 8:24 PM CDT | Areal Flood Advisory | LOT | Iroquois | 3 hr |
| Aug 19, 8:27 PM CDT | Special Weather Statement | ILX | Logan | 33 min |
| Aug 19, 8:49 PM CDT | Areal Flood Advisory | LOT | Ford, Livingston | 3 hr |
| Aug 19, 8:52 PM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Clinton, Edwards, Franklin, Gallatin and 21 more | 83 min |
| Aug 19, 9:05 PM CDT | Special Weather Statement | ILX | DeWitt | 40 min |
| Aug 19, 9:30 PM CDT | Flash Flood Warning | ILX | Champaign, DeWitt, Piatt | 3 hr |
| Aug 19, 9:42 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 7 hr |
| Aug 19, 10:35 PM CDT | Severe Thunderstorm Warning | PAH | Union | 25 min |
| Aug 19, 10:44 PM CDT | Flash Flood Warning | ILX | Champaign | 3 hr |
| Aug 19, 10:55 PM CDT | Severe Thunderstorm Warning | PAH | Alexander, Pulaski, Union | 50 min |
| Aug 19, 10:57 PM CDT | Severe Thunderstorm Warning | PAH | Johnson, Union | 36 min |
| Aug 19, 11:04 PM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pope, Pulaski | 86 min |
| Aug 19, 11:24 PM CDT | Severe Thunderstorm Warning | PAH | Alexander | 51 min |
| Aug 19, 11:29 PM CDT | Special Weather Statement | PAH | Pope | 31 min |
| Aug 19, 11:32 PM CDT | Flash Flood Warning | ILX | Champaign, Vermilion | 3 hr |
| Aug 19, 11:42 PM CDT | Flash Flood Warning | PAH | Alexander | 5 hr |
| Aug 19, 11:44 PM CDT | Severe Thunderstorm Warning | PAH | Alexander, Pulaski | 14 min |
| Aug 19, 11:57 PM CDT | Flash Flood Warning | PAH | Pulaski | 6 hr |
| Aug 20, 12:05 AM CDT | Severe Thunderstorm Warning | PAH | Alexander | 40 min |
| Aug 20, 12:31 AM CDT | Tornado Warning | PAH | Alexander | 13 min |
| Aug 20, 1:49 AM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pulaski | 86 min |
| Aug 20, 2:09 AM CDT | Special Weather Statement | PAH | Alexander | 36 min |
| Aug 20, 2:11 AM CDT | Severe Thunderstorm Warning | PAH | Alexander, Pulaski | 42 min |
| Aug 20, 4:02 AM CDT | Special Weather Statement | PAH | Massac, Pulaski | 28 min |
| Aug 21, 12:41 PM CDT | River Flood Warning | IND | Edwards, Gallatin, Wabash, White | 7 days |
| Aug 21, 2:17 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, McHenry | 43 min |
| Aug 21, 2:22 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, Fulton, Grundy and 23 more | 113 min |
| Aug 21, 2:57 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Kane | 63 min |
| Aug 21, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 29 more | 9 hr |
| Aug 21, 3:11 PM CDT | Beach Hazards Statement | LOT | Cook | 55 hr |
| Aug 21, 3:45 PM CDT | Severe Thunderstorm Warning | LOT | Boone, Winnebago | 22 min |
| Aug 21, 3:52 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Whiteside | 38 min |
| Aug 21, 4:13 PM CDT | Severe Thunderstorm Warning | LOT | Lee | 40 min |
| Aug 21, 4:55 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee, Ogle | 40 min |
| Aug 21, 5:28 PM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess, Stephenson | 47 min |
| Aug 21, 5:44 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, LaSalle, Lee | 46 min |
| Aug 21, 6:13 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, Kane, Kendall and 8 more | 2 hr |
| Aug 21, 6:15 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Jo Daviess, Stephenson | 60 min |
| Aug 21, 6:29 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 17 min |
| Aug 21, 6:54 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Whiteside | 66 min |
| Aug 21, 6:56 PM CDT | Tornado Warning | DVN | Bureau, Putnam | 49 min |
| Aug 21, 7:20 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 40 min |
| Aug 21, 7:22 PM CDT | Tornado Warning | DVN | Putnam | 23 min |
| Aug 21, 7:58 PM CDT | Areal Flood Advisory | LOT | LaSalle | 4 hr |
| Aug 21, 8:09 PM CDT | Tornado Warning | DVN | Putnam | 21 min |
| Aug 21, 8:12 PM CDT | Flash Flood Warning | DVN | Bureau, Putnam | 4 hr |
| Aug 21, 8:13 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Rock Island, Whiteside | 34 min |
| Aug 21, 8:19 PM CDT | Flash Flood Warning | LOT | LaSalle | 4 hr |
| Aug 21, 8:40 PM CDT | Flash Flood Warning | ILX | Marshall | 3 hr |
| Aug 21, 8:54 PM CDT | Special Weather Statement | DVN | Bureau, Henry, Mercer | 66 min |
| Aug 21, 9:10 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 19 min |
| Aug 21, 9:22 PM CDT | Severe Thunderstorm Warning | DVN | Henry | 23 min |
| Aug 21, 10:00 PM CDT | Special Weather Statement | ILX | Marshall, Woodford | 30 min |
| Aug 21, 10:33 PM CDT | Special Weather Statement | ILX | Tazewell | 42 min |
| Aug 21, 11:09 PM CDT | Special Weather Statement | ILX | Tazewell | 36 min |
| Aug 21, 11:17 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Mason, Menard | 43 min |
| Aug 21, 11:43 PM CDT | Mesoscale Discussion | SPC | Cass, Champaign, DeWitt, Logan, McLean, Macon and 3 more | 92 min |
| Aug 21, 11:58 PM CDT | Areal Flood Advisory | LOT | LaSalle | 6 hr |
| Aug 22, 12:41 AM CDT | Special Weather Statement | ILX | Sangamon | 49 min |
| Aug 22, 1:07 AM CDT | Special Weather Statement | ILX | Christian | 38 min |
| Aug 22, 2:38 AM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Macoupin, Madison, Marion and 1 more | 67 min |
| Aug 22, 2:50 AM CDT | Small Craft Advisory | LOT | 31 hr | |
| Aug 22, 3:24 AM CDT | Severe Thunderstorm Warning | PAH | Jefferson | 51 min |
| Aug 22, 3:54 AM CDT | Severe Thunderstorm Warning | PAH | Franklin, Hamilton, Jefferson, Wayne | 17 min |
| Aug 23, 1:17 PM CDT | River Flood Warning | PAH | Gallatin, Wabash, White | 5 days |
| Aug 26, 7:27 AM CDT | Special Weather Statement | PAH | Alexander, Massac, Pulaski | 63 min |
| Aug 26, 12:22 PM CDT | Mesoscale Discussion | SPC | Champaign, Douglas, Edgar, Ford, Iroquois, Kankakee and 2 more | 113 min |
| Aug 26, 3:25 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Vermilion | 42 min |
| Aug 26, 4:28 PM CDT | Special Weather Statement | ILX | Edgar | 32 min |
| Aug 26, 8:11 PM CDT | Special Weather Statement | PAH | Wabash | 34 min |
| Aug 30, 3:01 AM CDT | Small Craft Advisory | LOT | 12 hr | |
| Aug 30, 12:20 PM CDT | Heat Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 47 hr |
| Aug 30, 12:20 PM CDT | Extreme Heat Watch | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 10 hr |
| Aug 30, 12:23 PM CDT | Heat Advisory | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 29 more | 71 hr |
| Aug 30, 12:27 PM CDT | Heat Advisory | LSX | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more | 3 days |
| Aug 30, 12:27 PM CDT | Extreme Heat Watch | LSX | Clinton, Madison, Monroe, Randolph, Saint Clair, Washington | 11 hr |
| Aug 30, 1:04 PM CDT | Heat Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 6 days |
| Aug 31, 12:24 PM CDT | Heat Advisory | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 33 hr |
| Aug 31, 12:24 PM CDT | Heat Advisory | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 3 days |
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 | 118 |
| Tornado Warning | 28 |
| Severe Thunderstorm Watch | 12 |
| Mesoscale Discussion | 33 |
| Special Weather Statement | 49 |
| Flooding | |
| Areal Flood Warning | 11 |
| Flash Flood Warning | 56 |
| River Flood Warning | 24 |
| Flood Watch | 16 |
| River Flood Watch | 1 |
| Areal Flood Advisory | 48 |
| Heat | |
| Extreme Heat Warning | 2 |
| Extreme Heat Watch | 3 |
| Heat Advisory | 16 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
| Coast and beach | |
| Lakeshore Flood Warning | 1 |
| Beach Hazards Statement | 1 |
| Marine | |
| Special Marine Warning | 14 |
| Small Craft Advisory | 2 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County56
- Will County50
- LaSalle County49
- Ford County44
- Iroquois County43
- Grundy County42
- Vermilion County42
- Kankakee County42
- Livingston County42
- Champaign County41
- Kendall County39
- DuPage County39
- McLean County38
- Lee County34
- Peoria County34
- Tazewell County33
- Woodford County33
- Fulton County32
- Knox County32
- Bureau County32
- Mercer County31
- Henry County29
- Kane County28
- Henderson County28
- Rock Island County28
- DeKalb County28
- Marshall County28
- Stark County28
- Hancock County27
- Piatt County27
- Whiteside County27
- Warren County26
- Putnam County26
- McDonough County25
- DeWitt County23
- Mason County23
- Ogle County23
- Alexander County22
- Edgar County22
- Carroll County20
62 more counties
- Pulaski County19
- Boone County19
- Logan County19
- Douglas County18
- Winnebago County18
- Stephenson County18
- McHenry County17
- Jo Daviess County17
- Menard County16
- Macon County15
- Massac County15
- Clark County14
- Cass County14
- Sangamon County14
- Lake County14
- Morgan County13
- Schuyler County13
- Christian County12
- Randolph County11
- Jefferson County11
- Johnson County11
- Pope County11
- Union County11
- Crawford County11
- Madison County10
- Monroe County10
- Saint Clair County10
- Coles County10
- Franklin County10
- Hamilton County10
- Wabash County10
- White County10
- Adams County9
- Clinton County9
- Washington County9
- Gallatin County9
- Jackson County9
- Perry County9
- Scott County9
- Lawrence County9
- Cumberland County8
- Hardin County8
- Brown County7
- Moultrie County7
- Shelby County7
- Edwards County7
- Saline County7
- Wayne County7
- Williamson County7
- Pike County6
- Clay County6
- Effingham County6
- Jasper County6
- Richland County6
- Calhoun County5
- Jersey County5
- Macoupin County5
- Marion County5
- Bond County4
- Greene County3
- Fayette County3
- Montgomery County3
Nearby
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.