Alert archive / Illinois / 2021
Weather alerts in Illinois, September 2021
91 weather alerts in September 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 September 2021. Tap one for its archive.
- Alerts
- 91
- Warnings
- 32
- Watches
- 4
- Advisories
- 21
- Busiest day
- September 7, 202138 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 |
|---|---|---|---|---|
| Aug 31, 11:37 PM CDT | Flash Flood Warning | LSX | Bond, Fayette, Montgomery | 6 hr |
| Sep 5, 3:06 AM CDT | Small Craft Advisory | LOT | 16 hr | |
| Sep 6, 3:00 AM CDT | Gale Watch | LOT | 18 hr | |
| Sep 6, 9:29 PM CDT | Small Craft Advisory | LOT | 55 hr | |
| Sep 7, 12:25 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 9 more | 65 min |
| Sep 7, 12:37 PM CDT | Special Weather Statement | DVN | Carroll | 38 min |
| Sep 7, 12:37 PM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry, Winnebago | 53 min |
| Sep 7, 12:47 PM CDT | Severe Thunderstorm Warning | DVN | Whiteside | 29 min |
| Sep 7, 12:47 PM CDT | Special Marine Warning | LOT | 118 min | |
| Sep 7, 1:12 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Champaign, Cook, DeKalb, DeWitt and 34 more | 8 hr |
| Sep 7, 1:13 PM CDT | Special Weather Statement | LOT | Boone, DeKalb, Kane, Lee, Ogle | 32 min |
| Sep 7, 1:20 PM CDT | Severe Thunderstorm Warning | LOT | Lake, McHenry | 55 min |
| Sep 7, 1:23 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Kane, Lee, Ogle | 67 min |
| Sep 7, 1:41 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 49 min |
| Sep 7, 1:51 PM CDT | Special Marine Warning | LOT | 3 hr | |
| Sep 7, 2:03 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kendall, LaSalle | 72 min |
| Sep 7, 2:15 PM CDT | Areal Flood Advisory | LOT | Lake, McHenry | 3 hr |
| Sep 7, 2:15 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 30 min |
| Sep 7, 2:20 PM CDT | Special Weather Statement | DVN | Bureau | 25 min |
| Sep 7, 2:29 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kendall, LaSalle | 46 min |
| Sep 7, 2:41 PM CDT | Special Marine Warning | LOT | 94 min | |
| Sep 7, 2:47 PM CDT | Special Weather Statement | DVN | Putnam | 28 min |
| Sep 7, 2:55 PM CDT | Special Weather Statement | ILX | Stark | 20 min |
| Sep 7, 2:57 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kankakee, Kendall, LaSalle, Will | 63 min |
| Sep 7, 3:04 PM CDT | Tornado Warning | LOT | Will | 26 min |
| Sep 7, 3:14 PM CDT | Mesoscale Discussion | SPC | DuPage, Ford, Grundy, Iroquois, Kankakee, Kendall and 11 more | 91 min |
| Sep 7, 3:28 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Kankakee, Will | 62 min |
| Sep 7, 3:53 PM CDT | Severe Thunderstorm Warning | ILX | Marshall, Woodford | 37 min |
| Sep 7, 4:06 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Kankakee, LaSalle, Livingston | 54 min |
| Sep 7, 4:22 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Woodford | 38 min |
| Sep 7, 4:34 PM CDT | Special Weather Statement | LOT | Kankakee | 56 min |
| Sep 7, 4:58 PM CDT | Severe Thunderstorm Warning | ILX | McLean | 47 min |
| Sep 7, 4:58 PM CDT | Severe Thunderstorm Warning | ILX | McLean | 47 min |
| Sep 7, 4:59 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Livingston | 61 min |
| Sep 7, 5:21 PM CDT | Special Weather Statement | LOT | Grundy | 39 min |
| Sep 7, 5:25 PM CDT | Mesoscale Discussion | SPC | Champaign, Vermilion | 95 min |
| Sep 7, 5:39 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, DeWitt, McLean, Piatt | 36 min |
| Sep 7, 5:46 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kankakee, Livingston, Will | 44 min |
| Sep 7, 6:09 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Vermilion | 51 min |
| Sep 7, 6:30 PM CDT | Special Weather Statement | ILX | Piatt | 45 min |
| Sep 7, 6:53 PM CDT | Areal Flood Advisory | LOT | Iroquois, Kankakee | 3 hr |
| Sep 7, 7:00 PM CDT | Special Weather Statement | ILX | Douglas | 45 min |
| Sep 7, 7:04 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 56 min |
| Sep 7, 8:08 PM CDT | Special Weather Statement | ILX | Vermilion | 37 min |
| Sep 11, 4:03 AM CDT | Lake Wind Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 14 hr |
| Sep 13, 2:37 PM CDT | Small Craft Advisory | LOT | 37 hr | |
| Sep 14, 3:18 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Champaign, Christian, Clinton, Coles and 28 more | 117 min |
| Sep 14, 4:19 PM CDT | Special Weather Statement | PAH | Hamilton | 41 min |
| Sep 14, 6:45 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 30 min |
| Sep 14, 7:03 PM CDT | Special Weather Statement | ILX | Cumberland | 27 min |
| Sep 14, 7:19 PM CDT | Special Weather Statement | ILX | Clay, Jasper | 56 min |
| Sep 14, 7:31 PM CDT | Severe Thunderstorm Warning | ILX | Clay, Effingham, Jasper, Richland | 44 min |
| Sep 15, 4:20 AM CDT | Areal Flood Advisory | LSX | Randolph | 3 hr |
| Sep 17, 11:35 AM CDT | Areal Flood Advisory | PAH | Alexander, Pulaski | 3 hr |
| Sep 17, 2:50 PM CDT | Small Craft Advisory | LOT | 24 hr | |
| Sep 17, 2:53 PM CDT | Beach Hazards Statement | LOT | Cook, Lake | 28 hr |
| Sep 17, 6:00 PM CDT | Special Weather Statement | LOT | Kane | 45 min |
| Sep 19, 2:55 PM CDT | Small Craft Advisory | LOT | 57 hr | |
| Sep 20, 2:39 PM CDT | Beach Hazards Statement | LOT | Cook, Lake | 4 days |
| Sep 20, 8:52 PM CDT | Special Weather Statement | DVN | Rock Island | 23 min |
| Sep 20, 9:00 PM CDT | Special Weather Statement | DVN | Henderson, Warren | 45 min |
| Sep 20, 9:24 PM CDT | Special Weather Statement | ILX | Knox | 51 min |
| Sep 20, 9:37 PM CDT | Special Weather Statement | DVN | Hancock, Henderson, Henry, McDonough, Warren | 38 min |
| Sep 20, 10:07 PM CDT | Special Weather Statement | LOT | Lee | 38 min |
| Sep 20, 10:08 PM CDT | Special Weather Statement | ILX | Knox, Peoria, Stark | 52 min |
| Sep 20, 10:34 PM CDT | Special Weather Statement | DVN | Bureau, Putnam | 26 min |
| Sep 20, 10:35 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 40 min |
| Sep 20, 10:39 PM CDT | Special Weather Statement | ILX | Cass, Fulton, Mason, Schuyler | 51 min |
| Sep 20, 10:48 PM CDT | Special Weather Statement | LOT | Lee | 42 min |
| Sep 20, 11:16 PM CDT | Special Weather Statement | ILX | Peoria | 44 min |
| Sep 20, 11:30 PM CDT | Special Weather Statement | ILX | Mason, Menard, Tazewell | 45 min |
| Sep 20, 11:44 PM CDT | Special Weather Statement | LOT | Boone, DeKalb, Kane, Kendall, LaSalle, McHenry | 31 min |
| Sep 21, 12:03 AM CDT | Special Weather Statement | ILX | DeWitt, Logan, McLean | 57 min |
| Sep 21, 12:12 AM CDT | Special Marine Warning | LOT | 2 hr | |
| Sep 21, 3:40 AM CDT | Lakeshore Flood Advisory | LOT | Cook | 54 hr |
| Sep 21, 3:44 AM CDT | Gale Watch | LOT | 11 hr | |
| Sep 21, 3:44 AM CDT | Small Craft Advisory | LOT | 20 hr | |
| Sep 21, 3:06 PM CDT | Gale Warning | LOT | 48 hr | |
| Sep 22, 3:45 AM CDT | Lake Wind Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 13 hr |
| Sep 22, 12:19 PM CDT | Special Marine Warning | LOT | 86 min | |
| Sep 23, 9:04 AM CDT | Small Craft Advisory | LOT | 18 hr | |
| Sep 23, 8:59 PM CDT | Gale Watch | LOT | 6 hr | |
| Sep 24, 3:20 AM CDT | Gale Warning | LOT | 22 hr | |
| Sep 24, 3:20 AM CDT | Small Craft Advisory | LOT | 12 hr | |
| Sep 25, 1:42 AM CDT | Small Craft Advisory | LOT | 8 hr | |
| Sep 25, 5:02 AM CDT | Dense Fog Advisory | ILX | Cass, Christian, Morgan, Sangamon, Schuyler, Scott | 4 hr |
| Sep 25, 5:06 AM CDT | Dense Fog Advisory | LSX | Adams, Brown, Calhoun, Greene, Jersey, Macoupin and 2 more | 4 hr |
| Sep 25, 2:53 PM CDT | Small Craft Advisory | LOT | 43 hr | |
| Sep 27, 3:00 AM CDT | Small Craft Advisory | LOT | 31 hr | |
| Sep 27, 3:10 AM CDT | Beach Hazards Statement | LOT | Cook, Lake | 34 hr |
| Sep 27, 4:00 AM CDT | Lake Wind Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 13 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 | 23 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 27 |
| Flooding | |
| Flash Flood Warning | 1 |
| Areal Flood Advisory | 4 |
| Wind and dust | |
| Lake Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Coast and beach | |
| Lakeshore Flood Advisory | 1 |
| Beach Hazards Statement | 3 |
| Marine | |
| Gale Warning | 2 |
| Special Marine Warning | 5 |
| Gale Watch | 3 |
| Small Craft Advisory | 11 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Kankakee County9
- Cook County8
- Lake County8
- McLean County8
- Kendall County7
- Grundy County7
- Iroquois County7
- LaSalle County7
- Kane County6
- Lee County6
- McHenry County6
- Livingston County6
- Will County6
- Boone County5
- DeKalb County5
- Champaign County5
- Ford County5
- Vermilion County5
- Bureau County4
- Ogle County4
- DeWitt County4
- Knox County4
- Peoria County4
- Piatt County4
- Putnam County4
- Stark County4
- Woodford County4
- Alexander County4
- Hamilton County4
- Pulaski County4
- Montgomery County3
- DuPage County3
- Whiteside County3
- Douglas County3
- Henderson County3
- Logan County3
- Marshall County3
- Mason County3
- Tazewell County3
- Warren County3
56 more counties
- Edwards County3
- Franklin County3
- Gallatin County3
- Hardin County3
- Jackson County3
- Jefferson County3
- Johnson County3
- Massac County3
- Perry County3
- Pope County3
- Saline County3
- Union County3
- Wabash County3
- Wayne County3
- White County3
- Williamson County3
- Bond County2
- Fayette County2
- Carroll County2
- Winnebago County2
- Edgar County2
- Fulton County2
- Henry County2
- Calhoun County2
- Christian County2
- Cumberland County2
- Effingham County2
- Greene County2
- Jersey County2
- Macoupin County2
- Menard County2
- Morgan County2
- Saint Clair County2
- Sangamon County2
- Scott County2
- Clay County2
- Jasper County2
- Adams County2
- Pike County2
- Cass County2
- Schuyler County2
- Stephenson County1
- Mercer County1
- Clinton County1
- Coles County1
- Macon County1
- Madison County1
- Monroe County1
- Moultrie County1
- Shelby County1
- Richland County1
- Randolph County1
- Rock Island County1
- Hancock County1
- McDonough County1
- Brown County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.