Alert archive / Ohio / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 287

May 12, 200243 counties in Ohio; 17 counties in Pennsylvania; 8 counties in West Virginia

The Storm Prediction Center issued this severe thunderstorm watch at May 12, 2002, 10:45 AM EDT for 43 counties in Ohio; 17 counties in Pennsylvania; 8 counties in West Virginia. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 12, 2002, 10:45 AM EDT (14:45 UTC)
Expired
May 12, 2002, 4:00 PM EDT
In force
5 hr
Issued by
the Storm Prediction Center
All 68 counties

Ashland County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Guernsey County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Monroe County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Richland County, OH, Ross County, OH, Stark County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Washington County, OH, Wayne County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Butler County, PA, Cambria County, PA, Clarion County, PA, Clearfield County, PA, Elk County, PA, Fayette County, PA, Greene County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, Somerset County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Tyler County, WV, Wetzel County, WV

The radar

The Cleveland radar (KCLE), 124 km from the middle of the area, began a volume at 14:46 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 12, 11:09 AM EDTSevere Thunderstorm WarningILNChampaign, Union51 min
May 12, 11:22 AM EDTSevere Thunderstorm WarningILNClark38 min
May 12, 11:27 AM EDTSevere Thunderstorm WarningILNGreene33 min
May 12, 11:31 AM EDTSevere Thunderstorm WarningILNDelaware, Franklin59 min
May 12, 11:41 AM EDTSevere Thunderstorm WarningILNMadison49 min
May 12, 12:01 PM EDTSevere Thunderstorm WarningILNLicking44 min
May 12, 12:04 PM EDTSevere Thunderstorm WarningILNClinton26 min
May 12, 12:10 PM EDTSevere Thunderstorm WarningCLEKnox20 min
May 12, 12:26 PM EDTSevere Thunderstorm WarningPBZCoshocton64 min
May 12, 12:32 PM EDTSevere Thunderstorm WarningILNPickaway28 min
May 12, 12:35 PM EDTSevere Thunderstorm WarningPBZMuskingum55 min
May 12, 1:01 PM EDTSevere Thunderstorm WarningPBZTuscarawas59 min
May 12, 1:02 PM EDTSevere Thunderstorm WarningRLXPerry13 min
May 12, 1:09 PM EDTSevere Thunderstorm WarningPBZLawrence66 min
May 12, 1:12 PM EDTSevere Thunderstorm WarningPBZColumbiana63 min
May 12, 1:13 PM EDTSevere Thunderstorm WarningCTPCambria47 min
May 12, 1:15 PM EDTSevere Thunderstorm WarningILNFairfield, Hocking30 min
May 12, 1:20 PM EDTSevere Thunderstorm WarningPBZCarroll, Harrison55 min
May 12, 1:35 PM EDTSevere Thunderstorm WarningPBZButler70 min
May 12, 1:42 PM EDTSevere Thunderstorm WarningPBZJefferson63 min
May 12, 1:44 PM EDTSevere Thunderstorm WarningPBZBelmont61 min
May 12, 1:51 PM EDTFlash Flood WarningPBZClarion, Venango3 hr
May 12, 1:53 PM EDTSevere Thunderstorm WarningPBZBrooke, Hancock52 min
May 12, 1:58 PM EDTSevere Thunderstorm WarningPBZBeaver62 min
May 12, 2:01 PM EDTFlash Flood WarningCTPClearfield6 hr
May 12, 2:07 PM EDTSevere Thunderstorm WarningPBZAllegheny53 min
May 12, 2:09 PM EDTFlash Flood WarningPBZJefferson3 hr
May 12, 2:09 PM EDTSevere Thunderstorm WarningPBZWashington66 min
May 12, 2:13 PM EDTSevere Thunderstorm WarningPBZArmstrong62 min
May 12, 2:43 PM EDTSevere Thunderstorm WarningPBZWestmoreland62 min
May 12, 3:10 PM EDTSevere Thunderstorm WarningPBZIndiana80 min
May 12, 3:17 PM EDTSevere Thunderstorm WarningRLXMorgan, Washington28 min
May 12, 3:19 PM EDTSevere Thunderstorm WarningCTPCambria, Somerset41 min
May 12, 3:39 PM EDTSevere Thunderstorm WarningPBZWetzel81 min
May 12, 3:41 PM EDTSevere Thunderstorm WarningCTPBedford, Blair49 min
May 12, 3:48 PM EDTSevere Thunderstorm WarningRLXWashington42 min

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 2.8 hours before the alert went out and 135 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 12:00Z on 2002-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 637 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 12:00Z on 2002-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 148 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
637 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
680 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.7

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 12, 3:30 PM EDTSevere Thunderstorm WatchSPCAdams, Bedford, Berks, Blair, Carbon, Chester and 19 more6 hr
May 12, 5:15 PM EDTSevere Thunderstorm WatchSPCChester, Delaware, Montgomery, Philadelphia5 hr

Nearby

Severe Thunderstorm Watches in Ohio, 2002Severe Thunderstorm Watches in Pennsylvania, 2002Severe Thunderstorm Watches in West Virginia, 2002Every severe thunderstorm watch in 2002

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.