Alert archive / Illinois / Severe Thunderstorm Watches / 1999
Severe Thunderstorm Watches in Illinois, May 1999
7 severe thunderstorm watches in May 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 May 1999. Tap one for its archive.
- Severe Thunderstorm Watches
- 7
- Busiest day
- May 17, 19995 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 |
|---|---|---|---|---|
| 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 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Carroll County3
- Jo Daviess County3
- Stephenson County3
- Boone County2
- Lake County2
- McHenry County2
- Ogle County2
- Winnebago County2
- Tazewell County2
- Woodford County2
- Alexander County2
- Pulaski County2
- DeKalb County1
- Kane County1
- Adams County1
- Brown County1
- Bureau County1
- Cass County1
- Fulton County1
- Hancock County1
- Henderson County1
- Henry County1
- Kendall County1
- Knox County1
- LaSalle County1
- McDonough County1
- Marshall County1
- Mason County1
- Mercer County1
- Peoria County1
- Pike County1
- Putnam County1
- Rock Island County1
- Schuyler County1
- Stark County1
- Warren County1
- Ford County1
- Grundy County1
- Iroquois County1
- Kankakee County1
21 more counties
- Livingston County1
- McLean County1
- Will County1
- Edwards County1
- Franklin County1
- Gallatin County1
- Hamilton County1
- Hardin County1
- Jackson County1
- Jefferson County1
- Johnson County1
- Massac County1
- Perry County1
- Pope County1
- Saline County1
- Union County1
- Wabash County1
- Washington County1
- Wayne County1
- White County1
- Williamson County1
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.