Alert archive / Ohio / Mesoscale Discussions in 2004

Mesoscale Discussion 1256

June 13, 200439 counties in Ohio; 9 counties in Pennsylvania; 6 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2004, 11:08 PM EDT for 39 counties in Ohio; 9 counties in Pennsylvania; 6 counties in West Virginia. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jun 13, 2004, 11:08 PM EDT (03:08 UTC)
Expired
Jun 14, 2004, 12:45 AM EDT
In force
97 min
Issued by
the Storm Prediction Center
All 54 counties

Athens County, OH, Belmont County, OH, Carroll County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Madison County, OH, Mahoning County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Ross County, OH, Stark County, OH, Trumbull County, OH, Tuscarawas County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Beaver County, PA, Butler County, PA, Crawford County, PA, Erie County, PA, Forest County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Warren County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV, Pleasants County, WV, Wood County, WV

The radar

The Cleveland radar (KCLE), 94 km from the middle of the area, began a volume at 03:00 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.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 3.1 hours before the alert went out and 138 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 2004-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 876 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 2004-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 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
876 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1076 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 13, 8:30 PM EDTMesoscale DiscussionSPCAllen, Ashland, Ashtabula, Auglaize, Butler, Carroll and 62 more90 min
Jun 13, 11:45 PM EDTSevere Thunderstorm WatchSPCAdams, Athens, Belmont, Brown, Carroll, Clinton and 26 more4 hr
Jun 14, 2:40 AM EDTMesoscale DiscussionSPCBelmont, Jefferson, Monroe, Noble, Washington2 hr
Jun 14, 10:06 AM EDTMesoscale DiscussionSPCAllen, Ashland, Ashtabula, Crawford, Cuyahoga, Defiance and 26 more54 min
Jun 14, 10:40 AM EDTSevere Thunderstorm WatchSPCAllen, Ashland, Ashtabula, Auglaize, Carroll, Columbiana and 41 more7 hr
Jun 14, 11:22 AM EDTMesoscale DiscussionSPCAllen, Ashland, Ashtabula, Auglaize, Carroll, Columbiana and 36 more53 min
Jun 14, 1:29 PM EDTMesoscale DiscussionSPCAllen, Ashland, Ashtabula, Auglaize, Carroll, Columbiana and 41 more91 min
Jun 14, 5:00 PM EDTSevere Thunderstorm WatchSPCAshland, Ashtabula, Carroll, Columbiana, Coshocton, Crawford and 25 more6 hr
Jun 14, 7:15 PM EDTSevere Thunderstorm WatchSPCAthens, Belmont, Carroll, Coshocton, Fairfield, Gallia and 17 more4 hr
Jun 14, 3:20 PM EDTMesoscale DiscussionSPCCameron, Clarion, Crawford, Elk, Erie, Forest and 6 more115 min
Jun 14, 4:45 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Cumberland, Dauphin and 10 more2 hr

Nearby

Mesoscale Discussions in Ohio, 2004Mesoscale Discussions in Pennsylvania, 2004Mesoscale Discussions in West Virginia, 2004Every mesoscale discussion in 2004

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.