Alert archive / Indiana / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 286
The Storm Prediction Center issued this severe thunderstorm watch at May 11, 2011, 5:56 PM CDT for 18 counties in Illinois; 20 counties in Indiana; 9 counties in Michigan. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 11, 2011, 5:56 PM CDT (22:56 UTC)
- Expired
- May 11, 2011, 11:03 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 47 counties
Boone County, IL, Cook County, IL, DeKalb 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, LaSalle County, IL, Lee County, IL, Livingston County, IL, McHenry County, IL, Ogle County, IL, Will County, IL, Winnebago County, IL, Benton County, IN, Cass County, IN, Elkhart County, IN, Fulton County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Wabash County, IN, White County, IN, Whitley County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Kalamazoo County, MI, Saint Joseph County, MI, Van Buren County, MI
The radar
The Northern Indiana radar (KIWX), 97 km from the middle of the area, began a volume at 22:58 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
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 6:21 PM CDT | Severe Thunderstorm Warning | IWX | Marshall, Saint Joseph, Starke | 54 min |
| May 11, 6:33 PM CDT | Severe Thunderstorm Warning | IWX | LaPorte | 57 min |
| May 11, 6:44 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kankakee, Kendall, Will | 46 min |
| May 11, 6:48 PM CDT | Severe Thunderstorm Warning | IWX | LaPorte, Saint Joseph | 47 min |
| May 11, 7:04 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Will | 56 min |
| May 11, 7:13 PM CDT | Severe Thunderstorm Warning | IWX | Marshall, Starke | 62 min |
| May 11, 7:16 PM CDT | Severe Thunderstorm Warning | IWX | Berrien | 59 min |
| May 11, 7:41 PM CDT | Severe Thunderstorm Warning | IWX | Fulton, Kosciusko, Marshall | 64 min |
| May 11, 7:57 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 19 min |
| May 11, 8:27 PM CDT | Severe Thunderstorm Warning | IWX | Kosciusko | 51 min |
| May 11, 9:30 PM CDT | Severe Thunderstorm Warning | GRR | Allegan | 39 min |
| May 11, 9:34 PM CDT | Severe Thunderstorm Warning | GRR | Barry, Kent | 57 min |
| May 11, 9:48 PM CDT | Severe Thunderstorm Warning | GRR | Barry, Calhoun, Kalamazoo | 71 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 11, 12:55 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, DeKalb, DuPage, Jo Daviess, Kane and 7 more | 65 min |
| May 11, 1:23 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cass, DeKalb, DeWitt and 33 more | 6 hr |
| May 11, 2:18 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Champaign and 30 more | 57 min |
| May 11, 3:38 PM CDT | Mesoscale Discussion | SPC | Boone, Brown, Bureau, Carroll, Cass, Christian and 40 more | 2 hr |
| May 11, 5:40 PM CDT | Mesoscale Discussion | SPC | Elkhart, Fulton, Jasper, Kosciusko, LaGrange, Lake and 6 more | 65 min |
| May 11, 3:19 AM CDT | Mesoscale Discussion | SPC | Delta, Dickinson, Iron, Marquette, Menominee | 56 min |
| May 11, 1:16 PM CDT | Mesoscale Discussion | SPC | Arenac, Bay, Benzie, Clare, Crawford, Gladwin and 14 more | 119 min |
Nearby
Severe Thunderstorm Watches in Indiana, 2011Severe Thunderstorm Watches in Illinois, 2011Severe Thunderstorm Watches in Michigan, 2011Every severe thunderstorm watch in 2011
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.