Alert archive / Ohio / Severe Thunderstorm Watches in 2012

Severe Thunderstorm Watch 436

June 29, 201213 counties in Kentucky; 63 counties in Ohio; 22 counties in West Virginia

The Storm Prediction Center issued this severe thunderstorm watch at Jun 29, 2012, 3:02 PM EDT for 13 counties in Kentucky; 63 counties in Ohio; 22 counties in West Virginia. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jun 29, 2012, 3:02 PM EDT (19:02 UTC)
Expired: Jun 29, 2012, 8:29 PM EDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 70 kt

All 98 counties

Boone County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carter County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Pendleton County, KY, Robertson County, KY, Adams County, OH, Ashland County, OH, Athens County, OH, Auglaize County, OH, Belmont County, OH, Brown County, OH, Butler County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Meigs County, OH, Mercer County, OH, Miami County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Shelby County, OH, Stark County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Wyandot County, OH, Braxton County, WV, Brooke County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Gilmer County, WV, Hancock County, WV, Jackson County, WV, Kanawha County, WV, Marshall County, WV, Mason County, WV, Nicholas County, WV, Ohio County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 90 km from the middle of the area, began a volume at 19:03 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: 95%
One or more gusts of 65 knots or more: 70%
Ten or more severe hail reports: 50%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 29, 3:11 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Darke, Mercer, Shelby	64 min
Jun 29, 3:42 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Champaign, Hardin, Logan, Miami, Shelby	48 min
Jun 29, 3:44 PM EDT	Severe Thunderstorm Warning	ILN	Darke, Preble	46 min
Jun 29, 3:49 PM EDT	Severe Thunderstorm Warning	CLE	Hancock, Wood	56 min
Jun 29, 3:50 PM EDT	Severe Thunderstorm Warning	ILN	Champaign, Clark, Darke, Greene, Miami, Montgomery	25 min
Jun 29, 3:57 PM EDT	Severe Thunderstorm Warning	ILN	Champaign, Hardin, Logan, Union	48 min
Jun 29, 4:12 PM EDT	Severe Thunderstorm Warning	ILN	Champaign, Clark, Clinton, Darke, Fayette, Greene and 4 more	48 min
Jun 29, 4:14 PM EDT	Severe Thunderstorm Warning	ILN	Butler, Montgomery, Preble	46 min
Jun 29, 4:19 PM EDT	Severe Thunderstorm Warning	CLE	Marion, Wyandot	56 min
Jun 29, 4:20 PM EDT	Severe Thunderstorm Warning	ILN	Delaware, Franklin, Madison, Union	40 min
Jun 29, 4:29 PM EDT	Severe Thunderstorm Warning	ILN	Brown, Butler, Clermont, Clinton, Fayette, Hamilton and 3 more	46 min
Jun 29, 4:34 PM EDT	Severe Thunderstorm Warning	ILN	Clinton, Fayette, Franklin, Madison, Pickaway, Ross	56 min
Jun 29, 4:40 PM EDT	Severe Thunderstorm Warning	CLE	Hancock	16 min
Jun 29, 4:42 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Morrow	50 min
Jun 29, 4:52 PM EDT	Severe Thunderstorm Warning	ILN	Delaware, Franklin, Licking, Madison, Union	53 min
Jun 29, 4:53 PM EDT	Severe Thunderstorm Warning	ILN	Bracken, Campbell	37 min
Jun 29, 4:55 PM EDT	Severe Thunderstorm Warning	CLE	Knox, Richland	61 min
Jun 29, 5:05 PM EDT	Severe Thunderstorm Warning	ILN	Adams, Brown, Highland, Pike, Ross, Scioto	40 min
Jun 29, 5:07 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Franklin, Hocking, Pickaway, Ross	68 min
Jun 29, 5:08 PM EDT	Severe Thunderstorm Warning	CLE	Ashland	55 min
Jun 29, 5:12 PM EDT	Severe Thunderstorm Warning	RLX	Athens, Morgan, Perry	63 min
Jun 29, 5:18 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Coshocton, Guernsey, Harrison, Muskingum, Noble and 1 more	72 min
Jun 29, 5:20 PM EDT	Severe Thunderstorm Warning	CLE	Holmes	56 min
Jun 29, 5:25 PM EDT	Severe Thunderstorm Warning	ILN	Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 3 more	50 min
Jun 29, 5:32 PM EDT	Severe Thunderstorm Warning	ILN	Bracken, Lewis, Mason	43 min
Jun 29, 5:33 PM EDT	Severe Thunderstorm Warning	ILN	Pike, Ross, Scioto	57 min
Jun 29, 5:41 PM EDT	Severe Thunderstorm Warning	RLX	Athens, Gallia, Jackson, Lawrence, Meigs, Vinton	64 min
Jun 29, 5:43 PM EDT	Severe Thunderstorm Warning	ILN	Bracken, Grant, Owen, Pendleton, Robertson	47 min
Jun 29, 6:02 PM EDT	Severe Thunderstorm Warning	RLX	Athens, Morgan, Washington	58 min
Jun 29, 6:04 PM EDT	Tornado Warning	PBZ	Coshocton, Tuscarawas	26 min
Jun 29, 6:06 PM EDT	Severe Thunderstorm Warning	ILN	Bracken, Lewis, Mason, Robertson	39 min
Jun 29, 6:12 PM EDT	Severe Thunderstorm Warning	RLX	Boyd, Carter, Greenup, Lawrence	63 min
Jun 29, 6:15 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Carroll, Columbiana, Guernsey, Harrison, Jefferson and 3 more	60 min
Jun 29, 6:27 PM EDT	Tornado Warning	PBZ	Belmont, Guernsey, Harrison, Tuscarawas	33 min
Jun 29, 6:34 PM EDT	Severe Thunderstorm Warning	RLX	Gallia, Lawrence	56 min
Jun 29, 6:55 PM EDT	Tornado Warning	PBZ	Harrison, Jefferson	35 min
Jun 29, 6:58 PM EDT	Severe Thunderstorm Warning	RLX	Barbour, Braxton, Calhoun, Doddridge, Gilmer, Harrison and 9 more	62 min
Jun 29, 7:03 PM EDT	Severe Thunderstorm Warning	PBZ	Marion, Marshall, Monongalia, Preston, Wetzel	57 min
Jun 29, 7:04 PM EDT	Severe Thunderstorm Warning	RLX	Boyd, Carter, Lawrence	56 min
Jun 29, 7:15 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Harrison, Jefferson	60 min
Jun 29, 7:17 PM EDT	Severe Thunderstorm Warning	RLX	Boone, Braxton, Calhoun, Clay, Fayette, Gilmer and 8 more	58 min
Jun 29, 7:28 PM EDT	Flash Flood Warning	PBZ	Jefferson	3 hr
Jun 29, 7:42 PM EDT	Severe Thunderstorm Warning	RLX	Boone, Fayette, Kanawha, Logan, McDowell, Mingo and 2 more	63 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.0 hours before the alert went out and 88 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: 3674 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 979 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -59 m²/s²
0-3 km storm-relative helicity: -13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 29, 2:01 PM EDT	Mesoscale Discussion	SPC	Boone, Campbell, Gallatin, Kenton	119 min
Jun 29, 4:22 PM EDT	Mesoscale Discussion	SPC	Boone, Boyd, Bracken, Campbell, Carter, Fleming and 9 more	83 min
Jun 29, 6:03 PM EDT	Mesoscale Discussion	SPC	Bath, Bourbon, Boyd, Bracken, Campbell, Carter and 27 more	87 min
Jun 29, 6:34 PM EDT	Severe Thunderstorm Watch	SPC	Lawrence	6 hr
Jun 29, 7:51 PM EDT	Mesoscale Discussion	SPC	Breathitt, Floyd, Johnson, Knott, Magoffin, Martin and 2 more	114 min
Jun 28, 8:53 PM EDT	Mesoscale Discussion	SPC	Ashtabula, Cuyahoga, Erie, Geauga, Huron, Lake and 5 more	97 min
Jun 29, 10:22 AM EDT	Mesoscale Discussion	SPC	Darke, Mercer	2 hr
Jun 29, 11:49 AM EDT	Severe Thunderstorm Watch	SPC	Allen, Paulding, Putnam, Van Wert	6 hr
Jun 29, 3:07 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Athens, Auglaize, Belmont, Brown and 58 more	53 min

Nearby

Severe Thunderstorm Watches in Ohio, 2012 Severe Thunderstorm Watches in West Virginia, 2012 Severe Thunderstorm Watches in Kentucky, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.