Alert archive / Ohio / Tornado Watches in 2010

Tornado Watch 270

June 6, 20104 states

The Storm Prediction Center issued this tornado watch at Jun 6, 2010, 2:03 AM EDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 6, 2010, 2:03 AM EDT (06:03 UTC)
Expired
Jun 6, 2010, 9:00 AM EDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 86 counties

Cattaraugus County, NY, Chautauqua County, NY, Ashland County, OH, Ashtabula County, OH, Auglaize County, OH, Belmont County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Darke County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Geauga County, OH, Greene County, OH, Guernsey County, OH, Hancock County, OH, Hardin County, OH, Harrison County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Ottawa County, OH, Perry County, OH, Pickaway County, OH, Portage County, OH, Preble County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Wayne County, OH, Wood County, OH, Wyandot County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Clarion County, PA, Clearfield County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Forest County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, McKean County, PA, Mercer County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Ohio County, WV

The radar

The Cleveland radar (KCLE), 45 km from the middle of the area, began a volume at 06:06 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
50%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
10%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 6, 2:06 AM EDTSevere Thunderstorm WarningCTPCameron, Elk, McKean, Potter, Warren69 min
Jun 6, 2:13 AM EDTFlash Flood WarningCLEErie5 hr
Jun 6, 2:22 AM EDTFlash Flood WarningCLELucas, Wood5 hr
Jun 6, 2:26 AM EDTTornado WarningCLELucas, Wood64 min
Jun 6, 2:37 AM EDTSevere Thunderstorm WarningBUFChautauqua53 min
Jun 6, 2:40 AM EDTSevere Thunderstorm WarningCLEErie50 min
Jun 6, 2:46 AM EDTTornado WarningCLEOttawa44 min
Jun 6, 2:57 AM EDTSevere Thunderstorm WarningCLEErie, Huron, Sandusky, Seneca48 min
Jun 6, 3:26 AM EDTTornado WarningBUFCattaraugus, Chautauqua34 min
Jun 6, 3:26 AM EDTTornado WarningCLEErie, Ottawa49 min
Jun 6, 3:38 AM EDTSevere Thunderstorm WarningILNAuglaize, Mercer, Shelby37 min
Jun 6, 4:03 AM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus, Livingston57 min
Jun 6, 4:12 AM EDTTornado WarningBUFAllegany, Cattaraugus21 min
Jun 6, 4:21 AM EDTSevere Thunderstorm WarningCLEErie, Lorain39 min
Jun 6, 4:30 AM EDTSevere Thunderstorm WarningCLEAshtabula, Cuyahoga, Geauga, Lake45 min
Jun 6, 4:54 AM EDTSevere Thunderstorm WarningCLEErie, Huron, Lorain, Sandusky, Seneca66 min
Jun 6, 5:12 AM EDTSevere Thunderstorm WarningCLEAshtabula, Cuyahoga, Geauga, Lake, Portage, Trumbull63 min
Jun 6, 5:24 AM EDTTornado WarningCLEAshtabula, Geauga, Trumbull66 min
Jun 6, 5:33 AM EDTSevere Thunderstorm WarningILNDelaware, Franklin, Union29 min
Jun 6, 5:55 AM EDTTornado WarningCLECrawford65 min
Jun 6, 6:16 AM EDTSevere Thunderstorm WarningCTPMcKean, Warren44 min
Jun 6, 6:25 AM EDTTornado WarningCLEErie12 min
Jun 6, 6:33 AM EDTTornado WarningCTPMcKean, Warren42 min
Jun 6, 6:40 AM EDTSevere Thunderstorm WarningCTPElk, McKean, Warren65 min
Jun 6, 7:12 AM EDTSevere Thunderstorm WarningPBZClarion, Forest, Jefferson, Mercer, Venango48 min
Jun 6, 7:15 AM EDTSevere Thunderstorm WarningCTPMcKean, Potter45 min
Jun 6, 7:19 AM EDTTornado WarningPBZClarion, Forest, Jefferson, Mercer, Venango41 min
Jun 6, 7:36 AM EDTSevere Thunderstorm WarningPBZBelmont, Guernsey, Harrison, Jefferson, Tuscarawas24 min
Jun 6, 7:53 AM EDTSevere Thunderstorm WarningCTPMcKean, Potter, Tioga67 min
Jun 6, 7:55 AM EDTSevere Thunderstorm WarningPBZBelmont, Guernsey, Monroe, Muskingum, Noble65 min
Jun 6, 8:02 AM EDTTornado WarningPBZClarion, Forest, Jefferson28 min
Jun 6, 8:39 AM EDTSevere Thunderstorm WarningILNFairfield, Hocking, Pickaway36 min
Jun 6, 8:42 AM EDTTornado WarningILNFairfield, Hocking, Pickaway33 min
Jun 6, 8:54 AM EDTSevere Thunderstorm WarningPBZIndiana, Jefferson21 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

Pittsburgh, PA (KPIT), launched 00:00Z, 6.1 hours before the alert went out and 193 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-pSkew-T log-p diagram, Pittsburgh, PA at 00:00Z on 2010-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 586 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2010-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
586 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
689 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 6, 3:38 AM EDTMesoscale DiscussionSPCAllegany, Cattaraugus, Chautauqua, Chemung, Erie, Genesee and 9 more2 hr
Jun 6, 7:05 AM EDTMesoscale DiscussionSPCAllegany, Broome, Cattaraugus, Chemung, Schuyler, Steuben and 1 more115 min
Jun 6, 7:51 AM EDTTornado WatchSPCBroome, Chemung, Delaware, Steuben, Sullivan, Tioga7 hr
Jun 6, 10:25 AM EDTMesoscale DiscussionSPCBronx, Columbia, Dutchess, Kings, Nassau, New York and 9 more65 min
Jun 6, 11:08 AM EDTTornado WatchSPCAlbany, Bronx, Columbia, Dutchess, Greene, Kings and 15 more8 hr
Jun 6, 2:38 PM EDTMesoscale DiscussionSPCBronx, Columbia, Dutchess, Kings, Nassau, New York and 9 more67 min
Jun 5, 9:47 PM EDTMesoscale DiscussionSPCAllen, Defiance, Fulton, Hancock, Henry, Mercer and 5 more58 min
Jun 5, 10:11 PM EDTTornado WatchSPCAllen, Auglaize, Champaign, Clark, Darke, Defiance and 21 more7 hr
Jun 6, 12:17 AM EDTMesoscale DiscussionSPCAllen, Auglaize, Darke, Defiance, Fulton, Hancock and 12 more118 min
Jun 6, 12:30 AM EDTMesoscale DiscussionSPCAshland, Ashtabula, Crawford, Cuyahoga, Delaware, Erie and 14 more3 hr
Jun 6, 11:42 AM EDTMesoscale DiscussionSPCBerkeley, Jefferson, Morgan63 min
Jun 6, 12:40 PM EDTTornado WatchSPCBerkeley, Hampshire, Hardy, Jefferson, Morgan, Pendleton6 hr

Nearby

Tornado Watches in Ohio, 2010Tornado Watches in Pennsylvania, 2010Tornado Watches in West Virginia, 2010Every 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.