Alert archive / Illinois / Severe Thunderstorm Watches in 2013
Severe Thunderstorm Watch 255
The Storm Prediction Center issued this severe thunderstorm watch at May 30, 2013, 5:48 PM CDT for 11 counties in Illinois; 5 counties in Indiana. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 30, 2013, 5:48 PM CDT (22:48 UTC)
- Expired
- May 30, 2013, 11:50 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 70 kt
Counties Cook County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, McHenry County, IL, Will County, IL, Benton County, IN, Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 26 km from the middle of the area, began a volume at 22:48 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
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 6:42 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, Lee, McHenry, Ogle, Winnebago | 78 min |
| May 30, 9:19 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Livingston | 56 min |
| May 30, 9:40 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 65 min |
| May 30, 10:23 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee, Will | 82 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 |
|---|---|---|---|---|
| May 30, 11:20 AM CDT | Mesoscale Discussion | SPC | Jo Daviess, Stephenson | 115 min |
| May 30, 11:29 AM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Bureau, Calhoun, Cass and 47 more | 61 min |
| May 30, 12:32 PM CDT | Tornado Watch | SPC | Adams, Bond, Boone, Brown, Bureau, Calhoun and 57 more | 7 hr |
| May 30, 2:16 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Boone, Brown, Bureau, Calhoun and 53 more | 59 min |
| May 30, 3:52 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Boone, Brown, Bureau, Calhoun and 56 more | 113 min |
Nearby
Severe Thunderstorm Watches in Illinois, 2013Severe Thunderstorm Watches in Indiana, 2013Every severe thunderstorm watch in 2013
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.