Alert archive / Indiana / Severe Thunderstorm Watches in 2012

Severe Thunderstorm Watch 631

September 7, 201214 counties in Illinois; 31 counties in Indiana; 19 counties in Ohio

The Storm Prediction Center issued this severe thunderstorm watch at Sep 7, 2012, 3:41 PM CDT for 14 counties in Illinois; 31 counties in Indiana; 19 counties in Ohio. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Sep 7, 2012, 3:41 PM CDT (20:41 UTC)
Expired: Sep 7, 2012, 10:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 64 counties

Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Jasper County, IL, Lawrence County, IL, Moultrie County, IL, Richland County, IL, Shelby County, IL, Bartholomew County, IN, Brown County, IN, Clay County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, Fayette County, IN, Franklin County, IN, Greene County, IN, Hancock County, IN, Hendricks County, IN, Jackson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Ohio County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Brown County, OH, Butler County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Licking County, OH, Madison County, OH, Montgomery County, OH, Pickaway County, OH, Preble County, OH, Ross County, OH, Warren County, OH

The radar

The Indianapolis radar (KIND), 51 km from the middle of the area, began a volume at 20:40 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: 10%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 40%
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: 20%
Six or more combined severe hail and wind reports: 70%

Warnings issued inside it

16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Sep 7, 3:48 PM CDT	Severe Thunderstorm Warning	IND	Parke, Putnam	24 min
Sep 7, 5:36 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Coles, Douglas, Edgar	39 min
Sep 7, 6:05 PM CDT	Tornado Warning	ILX	Clark, Coles, Edgar	40 min
Sep 7, 6:12 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Douglas, Edgar	45 min
Sep 7, 6:29 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Cumberland, Effingham, Jasper, Richland, Shelby	61 min
Sep 7, 6:40 PM CDT	Severe Thunderstorm Warning	IND	Clay, Sullivan, Vigo	35 min
Sep 7, 6:41 PM CDT	Tornado Warning	ILX	Clark, Edgar	34 min
Sep 7, 6:59 PM CDT	Tornado Warning	IND	Hendricks, Montgomery, Putnam	46 min
Sep 7, 7:01 PM CDT	Severe Thunderstorm Warning	ILN	Union, Wayne	21 min
Sep 7, 7:13 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Lawrence	62 min
Sep 7, 7:26 PM CDT	Severe Thunderstorm Warning	IND	Clay, Greene, Knox, Sullivan, Vigo	49 min
Sep 7, 7:29 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Jasper, Richland	46 min
Sep 7, 7:41 PM CDT	Severe Thunderstorm Warning	IND	Boone, Hamilton, Marion	49 min
Sep 7, 8:45 PM CDT	Severe Thunderstorm Warning	IND	Decatur, Johnson, Rush, Shelby	45 min
Sep 7, 9:09 PM CDT	Severe Thunderstorm Warning	ILN	Fayette, Franklin, Ripley	51 min
Sep 7, 9:48 PM CDT	Tornado Warning	IND	Bartholomew, Decatur, Jennings	13 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 7, 10:09 AM CDT	Mesoscale Discussion	SPC	Clark, Coles, Crawford, Cumberland, Douglas, Edgar and 5 more	2 hr
Sep 7, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 8 more	6 hr
Sep 7, 3:22 PM CDT	Mesoscale Discussion	SPC	Cass, Champaign, Christian, Clark, Coles, Crawford and 23 more	53 min
Sep 7, 3:44 PM CDT	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 8 more	2 hr
Sep 7, 5:15 PM CDT	Severe Thunderstorm Watch	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	7 hr
Sep 7, 6:06 PM CDT	Mesoscale Discussion	SPC	Bond, Clinton, Madison, Monroe, Randolph, Saint Clair and 1 more	84 min
Sep 7, 10:36 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Blackford, Boone, Carroll, Cass and 38 more	6 hr
Sep 7, 12:16 PM CDT	Mesoscale Discussion	SPC	Adams, Delaware, Fayette, Hancock, Henry, Jay and 4 more	59 min
Sep 7, 1:16 PM CDT	Mesoscale Discussion	SPC	Fayette, Henry, Randolph, Rush, Union, Wayne	59 min
Sep 7, 2:39 PM CDT	Mesoscale Discussion	SPC	Dearborn, Franklin, Union	66 min
Sep 7, 2:22 PM CDT	Severe Thunderstorm Watch	SPC	Ashland, Ashtabula, Carroll, Columbiana, Coshocton, Crawford and 18 more	4 hr
Sep 7, 5:38 PM CDT	Mesoscale Discussion	SPC	Athens, Belmont, Carroll, Columbiana, Guernsey, Harrison and 15 more	97 min

Nearby

Severe Thunderstorm Watches in Indiana, 2012 Severe Thunderstorm Watches in Ohio, 2012 Severe Thunderstorm Watches in Illinois, 2012 Every severe thunderstorm watch in 2012

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.