Alert archive / Illinois / 2009
Weather alerts in Illinois, September 2009
87 weather alerts in September 2009, 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 2009. Tap one for its archive.
- Alerts
- 87
- Warnings
- 21
- Watches
- 4
- Advisories
- 53
- Busiest day
- September 26, 200918 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 |
|---|---|---|---|---|
| Sep 3, 5:05 PM CDT | Areal Flood Advisory | PAH | Jefferson | 55 min |
| Sep 4, 10:36 AM CDT | Marine Dense Fog Advisory | LOT | 4 hr | |
| Sep 5, 8:08 AM CDT | Dense Fog Advisory | LOT | DuPage, Grundy, Kane, Kendall | 3 hr |
| Sep 5, 10:48 AM CDT | Marine Dense Fog Advisory | LOT | 4 hr | |
| Sep 5, 5:50 PM CDT | Areal Flood Advisory | LSX | Randolph | 4 hr |
| Sep 6, 2:11 AM CDT | Flash Flood Warning | PAH | Hamilton, Saline | 6 hr |
| Sep 6, 3:16 AM CDT | Flash Flood Warning | PAH | White | 3 hr |
| Sep 6, 4:19 AM CDT | Flash Flood Warning | PAH | Williamson | 4 hr |
| Sep 6, 5:19 AM CDT | Areal Flood Advisory | PAH | Edwards, Wabash, Wayne, White | 3 hr |
| Sep 6, 5:35 AM CDT | Areal Flood Advisory | PAH | Franklin, Hamilton, Jackson, Jefferson, Perry, Wayne and 2 more | 3 hr |
| Sep 6, 9:04 AM CDT | Areal Flood Advisory | PAH | Johnson | 116 min |
| Sep 6, 5:41 PM CDT | Severe Thunderstorm Warning | PAH | Union | 34 min |
| Sep 6, 5:50 PM CDT | Areal Flood Advisory | PAH | Williamson | 115 min |
| Sep 6, 6:10 PM CDT | Areal Flood Advisory | ILX | Christian, Macon, Sangamon | 3 hr |
| Sep 6, 6:24 PM CDT | Areal Flood Advisory | PAH | Johnson, Union | 111 min |
| Sep 6, 6:35 PM CDT | Flash Flood Warning | ILX | Sangamon | 2 hr |
| Sep 6, 9:04 PM CDT | Dense Fog Advisory | LSX | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more | 12 hr |
| Sep 6, 11:22 PM CDT | Dense Fog Advisory | DVN | Hancock, Henderson, McDonough, Warren | 10 hr |
| Sep 6, 11:38 PM CDT | Dense Fog Advisory | ILX | Cass, Christian, Clark, Clay, Coles, Crawford and 24 more | 9 hr |
| Sep 7, 12:40 PM CDT | Marine Dense Fog Advisory | LOT | 3 hr | |
| Sep 9, 4:45 AM CDT | Dense Fog Advisory | ILX | Champaign, Christian, Clark, Clay, Coles, Crawford and 14 more | 6 hr |
| Sep 9, 9:19 PM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more | 12 hr |
| Sep 9, 9:22 PM CDT | Dense Fog Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 13 hr |
| Sep 10, 2:39 AM CDT | Dense Fog Advisory | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 29 more | 7 hr |
| Sep 10, 3:10 PM CDT | Dense Fog Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 18 hr |
| Sep 10, 8:43 PM CDT | Dense Fog Advisory | ILX | Cass, Champaign, Christian, Clark, Coles, Cumberland and 23 more | 11 hr |
| Sep 10, 8:44 PM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, DuPage, Ford, Iroquois, Kane and 7 more | 11 hr |
| Sep 10, 8:50 PM CDT | Dense Fog Advisory | LSX | Adams, Brown, Pike | 12 hr |
| Sep 12, 4:08 AM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 7 more | 5 hr |
| Sep 12, 9:05 AM CDT | Dense Fog Advisory | LOT | DuPage, Lake | 73 min |
| Sep 12, 9:43 PM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more | 11 hr |
| Sep 13, 4:44 AM CDT | Dense Fog Advisory | DVN | Bureau, Putnam | 4 hr |
| Sep 13, 4:55 AM CDT | Dense Fog Advisory | ILX | Champaign, DeWitt, McLean, Marshall, Peoria, Piatt and 4 more | 4 hr |
| Sep 13, 9:06 AM CDT | Dense Fog Advisory | DVN | Bureau, Putnam | 54 min |
| Sep 15, 4:14 AM CDT | Small Craft Advisory | LOT | 44 hr | |
| Sep 18, 4:10 AM CDT | Small Craft Advisory | LOT | 25 hr | |
| Sep 20, 8:53 AM CDT | Small Craft Advisory | LOT | 5 hr | |
| Sep 20, 9:44 AM CDT | Areal Flood Advisory | ILX | Morgan, Scott | 3 hr |
| Sep 20, 10:49 AM CDT | Flash Flood Warning | ILX | Morgan, Scott | 3 hr |
| Sep 20, 11:00 AM CDT | Areal Flood Advisory | ILX | Cass, Mason, Menard | 3 hr |
| Sep 20, 11:06 AM CDT | Flash Flood Warning | LSX | Greene, Macoupin | 4 hr |
| Sep 20, 7:25 PM CDT | Flash Flood Warning | ILX | Crawford | 6 hr |
| Sep 20, 10:02 PM CDT | Flash Flood Warning | PAH | Edwards, Wabash | 4 hr |
| Sep 21, 4:07 AM CDT | Dense Fog Advisory | LSX | Adams, Brown, Pike | 5 hr |
| Sep 22, 8:31 AM CDT | Areal Flood Advisory | LOT | Ogle | 3 hr |
| Sep 23, 1:54 PM CDT | Areal Flood Advisory | PAH | Gallatin, Hardin, Pope, Saline, White | 3 hr |
| Sep 24, 7:36 AM CDT | Dense Fog Advisory | LOT | Boone, Lake, McHenry, Winnebago | 53 min |
| Sep 25, 4:30 AM CDT | Marine Weather Statement | LOT | 4 days | |
| Sep 25, 2:42 PM CDT | Gale Watch | LOT | 24 hr | |
| Sep 25, 8:51 PM CDT | Dense Fog Advisory | ILX | Champaign, Christian, Clark, Clay, Coles, Crawford and 25 more | 13 hr |
| Sep 25, 11:11 PM CDT | Dense Fog Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 11 hr |
| Sep 26, 12:59 AM CDT | Dense Fog Advisory | DVN | Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more | 6 hr |
| Sep 26, 3:55 AM CDT | Dense Fog Advisory | LSX | Bond, Clinton, Fayette, Macoupin, Marion, Montgomery and 1 more | 5 hr |
| Sep 26, 4:41 AM CDT | Dense Fog Advisory | LOT | Ford, LaSalle, Lee, Livingston, Ogle | 5 hr |
| Sep 26, 7:11 AM CDT | Dense Fog Advisory | DVN | Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more | 3 hr |
| Sep 26, 1:42 PM CDT | Mesoscale Discussion | SPC | Adams, Alexander, Bond, Brown, Calhoun, Cass and 63 more | 93 min |
| Sep 26, 1:54 PM CDT | Severe Thunderstorm Warning | PAH | Franklin, Hamilton, Jefferson, Wayne | 51 min |
| Sep 26, 2:02 PM CDT | Special Weather Statement | ILX | Clay | 58 min |
| Sep 26, 2:27 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more | 5 hr |
| Sep 26, 2:52 PM CDT | Gale Warning | LOT | 3 days | |
| Sep 26, 2:52 PM CDT | Small Craft Advisory | LOT | 30 hr | |
| Sep 26, 2:56 PM CDT | Areal Flood Advisory | LOT | Livingston | 2 hr |
| Sep 26, 3:23 PM CDT | Severe Thunderstorm Warning | PAH | Edwards, Wabash, White | 48 min |
| Sep 26, 3:34 PM CDT | Severe Thunderstorm Warning | PAH | Franklin | 41 min |
| Sep 26, 3:37 PM CDT | Severe Thunderstorm Warning | PAH | Jackson | 38 min |
| Sep 26, 4:06 PM CDT | Severe Thunderstorm Warning | PAH | Jackson, Johnson, Union, Williamson | 21 min |
| Sep 26, 5:23 PM CDT | Mesoscale Discussion | SPC | Hardin, Massac | 97 min |
| Sep 26, 9:38 PM CDT | Dense Fog Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 12 hr |
| Sep 27, 4:09 AM CDT | Storm Warning | LOT | 42 hr | |
| Sep 27, 5:55 AM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more | 4 hr |
| Sep 27, 5:32 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Champaign, Cook, DeKalb and 39 more | 88 min |
| Sep 27, 6:12 PM CDT | Special Weather Statement | DVN | Stephenson | 63 min |
| Sep 27, 8:01 PM CDT | Special Weather Statement | DVN | Lee | 59 min |
| Sep 27, 8:22 PM CDT | Tornado Watch | SPC | Boone, Bureau, Cass, Champaign, Christian, Clark and 39 more | 3 hr |
| Sep 27, 9:12 PM CDT | Special Weather Statement | ILX | McLean | 63 min |
| Sep 27, 9:19 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Will | 41 min |
| Sep 27, 9:24 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Kendall, Will | 66 min |
| Sep 27, 9:25 PM CDT | Special Marine Warning | LOT | 95 min | |
| Sep 27, 9:49 PM CDT | Tornado Warning | LOT | Cook, Will | 26 min |
| Sep 27, 10:26 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 49 min |
| Sep 27, 11:04 PM CDT | Mesoscale Discussion | SPC | Champaign, DeWitt, Douglas, Edgar, Ford, Iroquois and 6 more | 86 min |
| Sep 28, 1:53 AM CDT | Lake Wind Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 17 hr |
| Sep 28, 4:29 AM CDT | Wind Advisory | LOT | Boone, DeKalb, DuPage, Kane, Kendall, Lake and 2 more | 15 hr |
| Sep 29, 3:17 AM CDT | Frost Advisory | DVN | Carroll, Jo Daviess, Stephenson, Whiteside | 24 hr |
| Sep 29, 4:14 AM CDT | Small Craft Advisory | LOT | 39 hr | |
| Sep 29, 3:26 PM CDT | Frost Advisory | LOT | Lee, Ogle, Winnebago | 17 hr |
| Sep 30, 4:29 AM CDT | Gale Watch | LOT | 36 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 | 9 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 4 |
| Flooding | |
| Flash Flood Warning | 8 |
| Areal Flood Advisory | 13 |
| Cold | |
| Frost Advisory | 2 |
| Wind and dust | |
| Lake Wind Advisory | 1 |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 28 |
| Marine | |
| Gale Warning | 1 |
| Special Marine Warning | 1 |
| Storm Warning | 1 |
| Gale Watch | 2 |
| Marine Dense Fog Advisory | 3 |
| Small Craft Advisory | 5 |
| Marine Weather Statement | 1 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- DuPage County11
- White County10
- DeWitt County10
- McLean County10
- Lake County10
- Kane County9
- Kendall County9
- Williamson County9
- Macon County9
- Champaign County9
- Piatt County9
- Boone County9
- Ford County9
- Iroquois County9
- Lee County9
- Livingston County9
- McHenry County9
- Ogle County9
- Winnebago County9
- Jefferson County8
- Hamilton County8
- Edwards County8
- Wabash County8
- Wayne County8
- Franklin County8
- Jackson County8
- Johnson County8
- Union County8
- Christian County8
- Sangamon County8
- Mason County8
- Menard County8
- Moultrie County8
- Peoria County8
- Shelby County8
- Tazewell County8
- Vermilion County8
- DeKalb County8
- LaSalle County8
- Bureau County8
62 more counties
- Putnam County8
- Grundy County7
- Saline County7
- Clark County7
- Coles County7
- Cumberland County7
- Logan County7
- Marshall County7
- Morgan County7
- Stark County7
- Woodford County7
- Douglas County7
- Edgar County7
- Kankakee County7
- Stephenson County7
- Hardin County7
- Perry County6
- Cass County6
- Clay County6
- Crawford County6
- Fulton County6
- Lawrence County6
- Richland County6
- Scott County6
- Carroll County6
- Jo Daviess County6
- Whiteside County6
- Gallatin County6
- Pope County6
- Massac County6
- McDonough County5
- Effingham County5
- Jasper County5
- Knox County5
- Schuyler County5
- Henry County5
- Mercer County5
- Rock Island County5
- Alexander County5
- Pulaski County5
- Cook County5
- Will County5
- Adams County4
- Brown County4
- Macoupin County4
- Pike County4
- Hancock County4
- Henderson County4
- Warren County4
- Randolph County3
- Bond County3
- Clinton County3
- Fayette County3
- Greene County3
- Marion County3
- Montgomery County3
- Washington County3
- Calhoun County2
- Jersey County2
- Madison County2
- Monroe County2
- Saint Clair County2
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
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.