Alert archive / Illinois / Severe Thunderstorm Watches / 2009
Severe Thunderstorm Watches in Illinois, August 2009
6 severe thunderstorm watches in August 2009. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in August 2009. Tap one for its archive.
- Severe Thunderstorm Watches
- 6
- Busiest day
- August 4, 20093 severe thunderstorm watches
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 4, 4:06 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calhoun, Greene, Hancock, Jersey and 2 more | 5 hr |
| Aug 4, 7:39 AM CDT | Severe Thunderstorm Watch | SPC | Bond, Cass, Champaign, Christian, Clark, Clay and 37 more | 4 hr |
| Aug 4, 3:09 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 8 more | 7 hr |
| Aug 9, 10:21 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 8 more | 8 hr |
| Aug 9, 5:52 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Carroll, Henderson, Henry, Jo Daviess, Knox and 11 more | 8 hr |
| Aug 19, 11:26 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Bond, Clinton, Fayette, Franklin, Jackson and 12 more | 9 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bond County2
- Fayette County2
- Knox County2
- Madison County2
- Marshall County2
- Stark County2
- Alexander County2
- Franklin County2
- Jackson County2
- Johnson County2
- Perry County2
- Pulaski County2
- Randolph County2
- Union County2
- Williamson County2
- Carroll County2
- Jo Daviess County2
- Lee County2
- Ogle County2
- Stephenson County2
- Whiteside County2
- Winnebago County2
- Adams County1
- Brown County1
- Calhoun County1
- Greene County1
- Hancock County1
- Jersey County1
- McDonough County1
- Pike County1
- Cass County1
- Champaign County1
- Christian County1
- Clark County1
- Clay County1
- Coles County1
- Crawford County1
- Cumberland County1
- DeWitt County1
- Douglas County1
52 more counties
- Edgar County1
- Effingham County1
- Ford County1
- Fulton County1
- Iroquois County1
- Jasper County1
- Lawrence County1
- Livingston County1
- Logan County1
- McLean County1
- Macon County1
- Macoupin County1
- Mason County1
- Menard County1
- Montgomery County1
- Morgan County1
- Moultrie County1
- Peoria County1
- Piatt County1
- Richland County1
- Sangamon County1
- Schuyler County1
- Scott County1
- Shelby County1
- Tazewell County1
- Vermilion County1
- Woodford County1
- Gallatin County1
- Hardin County1
- Massac County1
- Pope County1
- Saline County1
- Boone County1
- Cook County1
- DeKalb County1
- DuPage County1
- Kane County1
- Lake County1
- McHenry County1
- Bureau County1
- Henderson County1
- Henry County1
- Mercer County1
- Putnam County1
- Rock Island County1
- Warren County1
- Clinton County1
- Jefferson County1
- Marion County1
- Monroe County1
- Saint Clair County1
- Washington County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.