Alert archive / Illinois / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 496
The Storm Prediction Center issued this severe thunderstorm watch at Sep 5, 2014, 3:43 PM CDT for 37 counties in Illinois; 32 counties in Missouri. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 5, 2014, 3:43 PM CDT (20:43 UTC)
- Expired
- Sep 5, 2014, 9:39 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 69 counties
Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clinton County, IL, Coles County, IL, DeWitt County, IL, Douglas County, IL, Fayette County, IL, Fulton County, IL, Greene County, IL, Jersey County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Peoria County, IL, Piatt County, IL, Pike County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Tazewell County, IL, Vermilion County, IL, Woodford County, IL, Audrain County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Dallas County, MO, Franklin County, MO, Gasconade County, MO, Hickory County, MO, Jefferson County, MO, Laclede County, MO, Lincoln County, MO, Maries County, MO, Marion County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 98 km from the middle of the area, began a volume at 20:45 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 3:51 PM CDT | Severe Thunderstorm Warning | SGF | Maries, Phelps, Pulaski | 17 min |
| Sep 5, 3:53 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Ralls | 27 min |
| Sep 5, 4:07 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown | 35 min |
| Sep 5, 4:14 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Schuyler | 46 min |
| Sep 5, 4:20 PM CDT | Severe Thunderstorm Warning | ILX | Peoria, Tazewell | 40 min |
| Sep 5, 5:00 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Mason, Menard | 45 min |
| Sep 5, 5:31 PM CDT | Severe Thunderstorm Warning | SGF | Benton | 44 min |
| Sep 5, 5:34 PM CDT | Severe Thunderstorm Warning | ILX | Logan, Sangamon | 41 min |
| Sep 5, 6:19 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Warren | 26 min |
| Sep 5, 6:24 PM CDT | Severe Thunderstorm Warning | ILX | Macon | 27 min |
| Sep 5, 7:46 PM CDT | Severe Thunderstorm Warning | ILX | Edgar, Vermilion | 44 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 1:19 PM CDT | Mesoscale Discussion | SPC | Cook, Grundy, Iroquois, Kankakee, Will | 86 min |
| Sep 5, 2:02 PM CDT | Severe Thunderstorm Watch | SPC | Cook, DuPage, Ford, Grundy, Iroquois, Kane and 6 more | 6 hr |
| Sep 5, 2:38 PM CDT | Mesoscale Discussion | SPC | Bond, Brown, Calhoun, Cass, Champaign, Christian and 47 more | 67 min |
| Sep 5, 5:11 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Champaign and 31 more | 94 min |
| Sep 5, 5:36 PM CDT | Mesoscale Discussion | SPC | Cook, DuPage, Ford, Grundy, Iroquois, Kankakee and 3 more | 84 min |
Nearby
Severe Thunderstorm Watches in Illinois, 2014Severe Thunderstorm Watches in Missouri, 2014Every severe thunderstorm watch in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.