Alert archive / Indiana / Tornado Watches in 2010

Tornado Watch 143

May 7, 20104 states

The Storm Prediction Center issued this tornado watch at May 7, 2010, 2:30 PM CDT for 4 states. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: May 7, 2010, 2:30 PM CDT (19:30 UTC)
Expired: May 7, 2010, 11:35 PM CDT
In force: 9 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 137 counties

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, Richland County, IL, Vermilion County, IL, Adams County, IN, Allen County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Decatur County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fayette County, IN, Fountain County, IN, Franklin County, IN, Fulton County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jackson County, IN, Jay County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Kosciusko County, IN, LaGrange County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Martin County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Noble County, IN, Owen County, IN, Parke County, IN, Pulaski County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Saint Joseph County, IN, Shelby County, IN, Starke County, IN, Steuben County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Whitley County, IN, Branch County, MI, Cass County, MI, Hillsdale County, MI, Lenawee County, MI, Monroe County, MI, Saint Joseph County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Ashland County, OH, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Crawford County, OH, Cuyahoga County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Franklin County, OH, Fulton County, OH, Geauga County, OH, Greene County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Lake County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Portage County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Union County, OH, Van Wert County, OH, Wayne County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Indianapolis radar (KIND), 94 km from the middle of the area, began a volume at 19:29 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: 60%
One or more EF2 to EF5 tornadoes: 40%
Ten or more severe wind reports: 80%
One or more gusts of 65 knots or more: 40%
Ten or more severe hail reports: 80%
One or more hailstones of 2 inches or more: 40%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
May 7, 4:33 PM CDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale, Saint Joseph	57 min
May 7, 4:46 PM CDT	Severe Thunderstorm Warning	IWX	Allen	44 min
May 7, 5:23 PM CDT	Severe Thunderstorm Warning	IWX	Allen	52 min
May 7, 5:48 PM CDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe, Washtenaw, Wayne	44 min
May 7, 5:52 PM CDT	Tornado Warning	IWX	Defiance, Henry, Putnam	23 min
May 7, 5:57 PM CDT	Severe Thunderstorm Warning	CLE	Lucas, Wood	48 min
May 7, 6:23 PM CDT	Severe Thunderstorm Warning	CLE	Lucas, Ottawa	37 min
May 7, 6:32 PM CDT	Tornado Warning	CLE	Ottawa, Sandusky, Seneca, Wood	43 min
May 7, 6:54 PM CDT	Severe Thunderstorm Warning	CLE	Erie, Ottawa	51 min
May 7, 7:11 PM CDT	Tornado Warning	CLE	Erie, Ottawa	34 min
May 7, 7:21 PM CDT	Severe Thunderstorm Warning	ILN	Fayette, Union, Wayne	54 min
May 7, 7:31 PM CDT	Severe Thunderstorm Warning	CLE	Lorain	29 min
May 7, 7:47 PM CDT	Severe Thunderstorm Warning	CLE	Cuyahoga, Lake	43 min
May 7, 7:48 PM CDT	Severe Thunderstorm Warning	IWX	Allen	27 min
May 7, 7:57 PM CDT	Severe Thunderstorm Warning	CLE	Erie, Sandusky	48 min
May 7, 7:57 PM CDT	Severe Thunderstorm Warning	ILN	Champaign, Clark, Darke, Logan, Miami, Montgomery and 2 more	48 min
May 7, 7:59 PM CDT	Severe Thunderstorm Warning	ILN	Hardin	32 min
May 7, 8:06 PM CDT	Severe Thunderstorm Warning	CLE	Hancock, Wyandot	39 min
May 7, 8:15 PM CDT	Severe Thunderstorm Warning	CLE	Cuyahoga, Medina, Summit	45 min
May 7, 8:16 PM CDT	Tornado Warning	ILN	Hardin	15 min
May 7, 8:20 PM CDT	Severe Thunderstorm Warning	CLE	Ashtabula, Geauga, Lake, Trumbull	55 min
May 7, 8:32 PM CDT	Severe Thunderstorm Warning	ILN	Champaign, Delaware, Logan, Madison, Union	43 min
May 7, 8:35 PM CDT	Severe Thunderstorm Warning	CLE	Crawford, Seneca, Wyandot	55 min
May 7, 8:40 PM CDT	Tornado Warning	CLE	Ashtabula, Geauga	30 min
May 7, 8:51 PM CDT	Severe Thunderstorm Warning	CLE	Portage, Trumbull	39 min
May 7, 9:01 PM CDT	Severe Thunderstorm Warning	CLE	Ashland, Huron, Richland	44 min
May 7, 9:02 PM CDT	Severe Thunderstorm Warning	CLE	Cuyahoga, Lake	28 min
May 7, 9:22 PM CDT	Tornado Warning	CLE	Ashland, Medina, Richland, Wayne	37 min
May 7, 9:38 PM CDT	Severe Thunderstorm Warning	CLE	Knox	52 min
May 7, 10:00 PM CDT	Severe Thunderstorm Warning	CLE	Ashland, Richland	22 min
May 7, 10:09 PM CDT	Severe Thunderstorm Warning	CLE	Mahoning, Portage, Trumbull	41 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

Lincoln, IL (KILX), launched 12:00Z, 7.5 hours before the alert went out and 230 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 758 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 400 m²/s²
0-3 km storm-relative helicity: 542 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 7, 2:31 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Fulton, Hancock, Henderson, Knox and 5 more	59 min
May 7, 5:07 PM CDT	Mesoscale Discussion	SPC	Alexander, Gallatin, Hamilton, Hardin, Johnson, Massac and 6 more	113 min
May 7, 5:53 PM CDT	Severe Thunderstorm Watch	SPC	Gallatin, Hardin, Massac, Pope	7 hr
May 7, 1:59 PM CDT	Mesoscale Discussion	SPC	Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 14 more	91 min
May 7, 6:25 PM CDT	Mesoscale Discussion	SPC	Adams, Jay, Randolph	95 min

Nearby

Tornado Watches in Indiana, 2010 Tornado Watches in Ohio, 2010 Tornado Watches in Illinois, 2010 Every tornado watch in 2010

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.