Alert archive / Indiana / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 625
The Storm Prediction Center issued this severe thunderstorm watch at Jul 11, 2011, 5:37 AM CDT for 15 counties in Illinois; 28 counties in Indiana; 28 counties in Michigan. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2011, 5:37 AM CDT (10:37 UTC)
- Expired
- Jul 11, 2011, 12:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 70 kt
All 71 counties
Boone County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Will County, IL, Winnebago County, IL, Adams County, IN, Allen County, IN, Blackford County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Huntington County, IN, Jasper County, IN, Jay 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, Steuben County, IN, Wabash County, IN, Wells 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, Clare County, MI, Clinton County, MI, Eaton County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lake County, MI, Mason County, MI, Mecosta County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Saint Joseph County, MI, Van Buren County, MI
The radar
The Chicago radar (KLOT), 75 km from the middle of the area, began a volume at 10:40 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
- 90%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
27 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 5:49 AM CDT | Severe Thunderstorm Warning | GRR | Oceana | 56 min |
| Jul 11, 6:15 AM CDT | Severe Thunderstorm Warning | GRR | Mason | 50 min |
| Jul 11, 6:16 AM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, LaSalle, Lee, Ogle, Winnebago | 59 min |
| Jul 11, 6:22 AM CDT | Severe Thunderstorm Warning | GRR | Van Buren | 31 min |
| Jul 11, 6:31 AM CDT | Severe Thunderstorm Warning | GRR | Muskegon | 59 min |
| Jul 11, 6:38 AM CDT | Severe Thunderstorm Warning | GRR | Lake, Newaygo, Oceana | 52 min |
| Jul 11, 6:47 AM CDT | Severe Thunderstorm Warning | GRR | Ottawa | 58 min |
| Jul 11, 6:59 AM CDT | Severe Thunderstorm Warning | GRR | Ionia, Kent, Mecosta, Montcalm | 91 min |
| Jul 11, 7:03 AM CDT | Severe Thunderstorm Warning | LOT | Boone, Cook, DeKalb, DuPage, Kane, Kendall and 6 more | 57 min |
| Jul 11, 7:17 AM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle, Winnebago | 43 min |
| Jul 11, 7:39 AM CDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella | 51 min |
| Jul 11, 7:44 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kendall, Lake, Will | 46 min |
| Jul 11, 7:48 AM CDT | Severe Thunderstorm Warning | GRR | Allegan, Barry | 44 min |
| Jul 11, 7:56 AM CDT | Severe Thunderstorm Warning | GRR | Clinton | 52 min |
| Jul 11, 8:19 AM CDT | Severe Thunderstorm Warning | IWX | Steuben | 41 min |
| Jul 11, 8:22 AM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 53 min |
| Jul 11, 8:42 AM CDT | Severe Thunderstorm Warning | IWX | Elkhart, LaPorte, Marshall, Saint Joseph, Starke | 78 min |
| Jul 11, 8:46 AM CDT | Severe Thunderstorm Warning | GRR | Allegan, Ottawa, Van Buren | 73 min |
| Jul 11, 9:21 AM CDT | Severe Thunderstorm Warning | GRR | Barry, Calhoun, Kalamazoo, Kent | 84 min |
| Jul 11, 9:29 AM CDT | Severe Thunderstorm Warning | GRR | Muskegon | 31 min |
| Jul 11, 9:30 AM CDT | Severe Thunderstorm Warning | IWX | DeKalb, Elkhart, Kosciusko, LaGrange, Marshall, Noble and 2 more | 75 min |
| Jul 11, 9:47 AM CDT | Tornado Warning | IWX | Branch, Saint Joseph | 43 min |
| Jul 11, 9:58 AM CDT | Severe Thunderstorm Warning | GRR | Eaton, Ionia, Montcalm | 44 min |
| Jul 11, 10:19 AM CDT | Severe Thunderstorm Warning | IWX | DeKalb, Steuben | 56 min |
| Jul 11, 10:25 AM CDT | Severe Thunderstorm Warning | GRR | Clinton, Ingham, Jackson | 45 min |
| Jul 11, 10:39 AM CDT | Severe Thunderstorm Warning | IWX | Allen, DeKalb | 51 min |
| Jul 11, 11:00 AM CDT | Severe Thunderstorm Warning | IWX | Huntington, Miami, Wabash | 60 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 10.6 hours before the alert went out and 249 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 3733 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 850 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 165 m²/s²
- Significant tornado parameter
- 3.4
- Supercell composite
- 14.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 3:30 AM CDT | Severe Thunderstorm Watch | SPC | Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more | 6 hr |
| Jul 11, 5:07 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 17 more | 113 min |
| Jul 11, 7:10 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Cass, Cook, DeKalb, DuPage and 27 more | 95 min |
| Jul 11, 7:50 AM CDT | Mesoscale Discussion | SPC | Champaign, Clark, Coles, Cook, DeWitt, Douglas and 14 more | 55 min |
| Jul 11, 5:16 PM CDT | Mesoscale Discussion | SPC | Cass, Champaign, DeWitt, Douglas, Ford, Fulton and 19 more | 59 min |
| Jul 11, 9:55 AM CDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, Carroll, Cass, Clinton and 26 more | 65 min |
| Jul 11, 11:34 AM CDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, Delaware, Grant, Huntington and 5 more | 56 min |
| Jul 11, 2:43 PM CDT | Mesoscale Discussion | SPC | Dearborn, Ohio, Ripley, Switzerland | 92 min |
| Jul 11, 4:54 PM CDT | Mesoscale Discussion | SPC | Dearborn, Franklin, Ohio | 96 min |
| Jul 11, 6:18 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Blackford, Boone, Carroll, Cass, Clinton and 30 more | 3 hr |
| Jul 11, 8:07 AM CDT | Severe Thunderstorm Watch | SPC | Bay, Genesee, Huron, Lapeer, Lenawee, Livingston and 11 more | 4 hr |
| Jul 10, 7:51 PM CDT | Mesoscale Discussion | SPC | Buffalo, Crawford, Dunn, Eau Claire, La Crosse, Pepin and 4 more | 84 min |
| Jul 10, 9:53 PM CDT | Mesoscale Discussion | SPC | Buffalo, Crawford, Dunn, Eau Claire, Jackson, La Crosse and 7 more | 67 min |
| Jul 10, 10:10 PM CDT | Severe Thunderstorm Watch | SPC | Barron, Buffalo, Chippewa, Dunn, Eau Claire, La Crosse and 6 more | 6 hr |
| Jul 10, 11:45 PM CDT | Mesoscale Discussion | SPC | Buffalo, Chippewa, Crawford, Dunn, Eau Claire, Jackson and 7 more | 90 min |
| Jul 11, 2:07 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calumet, Clark, Columbia, Dodge and 27 more | 83 min |
Nearby
Severe Thunderstorm Watches in Indiana, 2011Severe Thunderstorm Watches in Michigan, 2011Severe Thunderstorm Watches in Illinois, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.