Alert archive / Illinois / Severe Thunderstorm Watches
Severe Thunderstorm Watches in Illinois, 1999
34 severe thunderstorm watches in 1999. 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 1999. Tap one for its archive.
- Severe Thunderstorm Watches
- 34
- Busiest month
- June12 severe thunderstorm watches
- Busiest day
- May 17, 19995 severe thunderstorm watches
Over time
By month
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 |
|---|---|---|---|---|
| Feb 11, 11:15 AM CST | Severe Thunderstorm Watch | SPC | Adams, Brown, Bureau, Calhoun, Cass, Fulton and 26 more | 7 hr |
| Feb 11, 1:00 PM CST | Severe Thunderstorm Watch | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 8 more | 5 hr |
| Feb 27, 12:15 PM CST | Severe Thunderstorm Watch | SPC | Alexander, Edwards, Franklin, Hamilton, Jackson, Jefferson and 11 more | 6 hr |
| Apr 3, 7:00 PM CST | Severe Thunderstorm Watch | SPC | Alexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 6 more | 5 hr |
| Apr 5, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Clay, Crawford, Cumberland, Edwards, Effingham and 9 more | 5 hr |
| Apr 20, 9:15 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Calhoun, Pike | 5 hr |
| Apr 22, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Bond, Brown, Calhoun, Cass, Champaign and 37 more | 6 hr |
| May 16, 2:15 PM CDT | Severe Thunderstorm Watch | SPC | Carroll, Jo Daviess, Stephenson | 6 hr |
| May 16, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Jo Daviess, Lake, McHenry, Ogle and 2 more | 6 hr |
| May 16, 11:00 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, DeKalb, Jo Daviess, Kane, Lake and 4 more | 6 hr |
| May 16, 11:45 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Bureau, Cass, Fulton, Hancock and 18 more | 5 hr |
| May 17, 1:45 AM CDT | Severe Thunderstorm Watch | SPC | Ford, Grundy, Iroquois, Kankakee, Livingston, McLean and 3 more | 4 hr |
| May 17, 1:30 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Pulaski | 6 hr |
| May 17, 3:00 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 14 more | 6 hr |
| Jun 4, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Cass, DeWitt, Fulton, Hancock and 18 more | 5 hr |
| Jun 4, 4:30 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Champaign, Christian, Clark, Coles, Crawford and 28 more | 3 hr |
| Jun 4, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Cass, Champaign, Christian, Clark, Clay and 47 more | 5 hr |
| Jun 4, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | Hardin, Massac, Pope, Pulaski | 5 hr |
| Jun 6, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, DeKalb, Kane, Kendall and 6 more | 6 hr |
| Jun 8, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | Rock Island | 6 hr |
| Jun 10, 10:35 AM CDT | Severe Thunderstorm Watch | SPC | Henderson, Henry, Mercer, Rock Island | 5 hr |
| Jun 10, 3:45 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Brown, Bureau, Carroll, Cass, Champaign and 41 more | 5 hr |
| Jun 11, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, DeKalb, Jo Daviess, Kane, Kendall and 7 more | 7 hr |
| Jun 27, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Jackson, Johnson, Monroe, Pulaski, Randolph and 2 more | 6 hr |
| Jun 28, 10:30 AM CDT | Severe Thunderstorm Watch | SPC | Clinton, Madison, Monroe, Randolph, Saint Clair, Washington | 5 hr |
| Jun 28, 1:30 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 5 hr |
| Jul 20, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Carroll, Henry, Jo Daviess, Mercer, Rock Island, Stark and 2 more | 5 hr |
| Jul 23, 3:00 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Cook, DeKalb, Kane, Lake and 4 more | 6 hr |
| Jul 23, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Champaign, DeWitt, Ford, Fulton, Grundy and 20 more | 5 hr |
| Jul 27, 10:45 PM CDT | Severe Thunderstorm Watch | SPC | Mercer, Rock Island | 5 hr |
| Aug 13, 12:00 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Bond, Clay, Clinton, Crawford, Cumberland and 28 more | 5 hr |
| Aug 23, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Boone, Brown, Bureau, Calhoun, Carroll and 31 more | 6 hr |
| Aug 23, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Cass, DeWitt, Ford, Fulton and 20 more | 6 hr |
| Aug 23, 7:15 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Champaign, Christian, Clark, Clay and 22 more | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Rock Island County10
- Tazewell County10
- Carroll County10
- Stephenson County10
- Mason County9
- Peoria County9
- Stark County9
- Cass County8
- Fulton County8
- Henry County8
- Marshall County8
- Mercer County8
- Putnam County8
- Woodford County8
- Boone County8
- Jo Daviess County8
- McHenry County8
- Ogle County8
- Winnebago County8
- Adams County7
- Brown County7
- Bureau County7
- Knox County7
- McDonough County7
- Menard County7
- Morgan County7
- Pike County7
- Schuyler County7
- DeKalb County7
- Whiteside County7
- Alexander County7
- Pulaski County7
- DeWitt County7
- Ford County7
- Logan County7
- McLean County7
- Madison County6
- Monroe County6
- Sangamon County6
- Scott County6
62 more counties
- Warren County6
- Kane County6
- Lee County6
- Union County6
- Washington County6
- Williamson County6
- Hardin County6
- Johnson County6
- Champaign County6
- Iroquois County6
- Kankakee County6
- Livingston County6
- Kendall County6
- Calhoun County5
- Hancock County5
- Henderson County5
- Jersey County5
- Macoupin County5
- Lake County5
- Edwards County5
- Franklin County5
- Jackson County5
- Randolph County5
- Saline County5
- Wabash County5
- Wayne County5
- White County5
- Pope County5
- Cumberland County5
- Effingham County5
- Jasper County5
- Shelby County5
- Clinton County5
- Fayette County5
- Macon County5
- Piatt County5
- LaSalle County5
- Grundy County5
- Greene County4
- Hamilton County4
- Jefferson County4
- Perry County4
- Saint Clair County4
- Gallatin County4
- Massac County4
- Clark County4
- Clay County4
- Crawford County4
- Bond County4
- Christian County4
- Montgomery County4
- Moultrie County4
- Will County4
- Douglas County4
- Vermilion County4
- Lawrence County3
- Richland County3
- Coles County3
- Edgar County3
- Marion County3
- Cook County2
- DuPage County2
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19982000
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.