Alert archive / West Virginia / Mesoscale Discussions in 2004

Mesoscale Discussion 1259

June 14, 20045 counties in Ohio; Allegheny County, Beaver County, Washington County, Pennsylvania; 7 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 14, 2004, 2:40 AM EDT for 5 counties in Ohio; Allegheny County, Beaver County, Washington County, Pennsylvania; 7 counties in West Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 14, 2004, 2:40 AM EDT (06:40 UTC)
Expired: Jun 14, 2004, 4:45 AM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Belmont County, OH, Jefferson County, OH, Monroe County, OH, Noble County, OH, Washington County, OH, Allegheny County, PA, Beaver County, PA, Washington County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV, Pleasants County, WV, Tyler County, WV, Wood County, WV

The radar

The Pittsburgh radar (KPBZ), 92 km from the middle of the area, began a volume at 06:40 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 nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 6.7 hours before the alert went out and 92 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: 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.

Issued	Product	Office	Counties	Lasted
Jun 13, 8:30 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Ashtabula, Auglaize, Butler, Carroll and 62 more	90 min
Jun 13, 11:08 PM EDT	Mesoscale Discussion	SPC	Athens, Belmont, Carroll, Clermont, Clinton, Columbiana and 33 more	97 min
Jun 13, 11:45 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Athens, Belmont, Brown, Carroll, Clinton and 26 more	4 hr
Jun 14, 10:06 AM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Ashtabula, Crawford, Cuyahoga, Defiance and 26 more	54 min
Jun 14, 10:40 AM EDT	Severe Thunderstorm Watch	SPC	Allen, Ashland, Ashtabula, Auglaize, Carroll, Columbiana and 41 more	7 hr
Jun 14, 11:22 AM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Ashtabula, Auglaize, Carroll, Columbiana and 36 more	53 min
Jun 14, 1:29 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Ashtabula, Auglaize, Carroll, Columbiana and 41 more	91 min
Jun 14, 5:00 PM EDT	Severe Thunderstorm Watch	SPC	Ashland, Ashtabula, Carroll, Columbiana, Coshocton, Crawford and 25 more	6 hr
Jun 14, 7:15 PM EDT	Severe Thunderstorm Watch	SPC	Athens, Belmont, Carroll, Coshocton, Fairfield, Gallia and 17 more	4 hr
Jun 14, 3:20 PM EDT	Mesoscale Discussion	SPC	Cameron, Clarion, Crawford, Elk, Erie, Forest and 6 more	115 min
Jun 14, 4:45 PM EDT	Mesoscale Discussion	SPC	Adams, Berks, Bucks, Chester, Cumberland, Dauphin and 10 more	2 hr

Nearby

Mesoscale Discussions in West Virginia, 2004 Mesoscale Discussions in Ohio, 2004 Mesoscale Discussions in Pennsylvania, 2004 Every 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.