Alert archive / West Virginia / Mesoscale Discussions in 2012

Mesoscale Discussion 1614

July 26, 20125 states

The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2012, 6:06 PM EDT for 5 states. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Jul 26, 2012, 6:06 PM EDT (22:06 UTC)
Expired
Jul 26, 2012, 7:30 PM EDT
In force
84 min
Issued by
the Storm Prediction Center
All 55 counties

Boyd County, KY, Greenup County, KY, Lewis County, KY, Garrett County, MD, Athens County, OH, Belmont County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Jackson County, OH, Jefferson County, OH, Lawrence County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Noble County, OH, Scioto County, OH, Vinton County, OH, Washington County, OH, Allegheny County, PA, Fayette County, PA, Greene County, PA, Somerset County, PA, Washington County, PA, Westmoreland County, PA, Barbour County, WV, Braxton County, WV, Brooke County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Gilmer County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 118 km from the middle of the area, began a volume at 22:07 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 12:00Z, 10.1 hours before the alert went out and 159 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 2012-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2136 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 2012-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 284 square meters per square second.193958Sfc1 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
2136 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
847 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
284 m²/s²
0-3 km storm-relative helicity
277 m²/s²
Significant tornado parameter
1.7
Supercell composite
13.9

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
Jul 26, 12:26 PM EDTMesoscale DiscussionSPCBoone, Bracken, Campbell, Carroll, Gallatin, Grant and 11 more2 hr
Jul 26, 1:16 PM EDTSevere Thunderstorm WatchSPCBoone, Bracken, Campbell, Carroll, Gallatin, Grant and 7 more9 hr
Jul 26, 2:25 PM EDTMesoscale DiscussionSPCBallard, Carlisle, Livingston, McCracken65 min
Jul 26, 2:46 PM EDTSevere Thunderstorm WatchSPCAdair, Allen, Anderson, Ballard, Barren, Bourbon and 65 more10 hr
Jul 26, 3:37 PM EDTMesoscale DiscussionSPCBoone, Boyd, Bracken, Campbell, Carter, Fleming and 8 more113 min
Jul 26, 4:55 PM EDTMesoscale DiscussionSPCAnderson, Ballard, Breckinridge, Bullitt, Butler, Caldwell and 39 more35 min
Jul 26, 4:57 PM EDTMesoscale DiscussionSPCBath, Bourbon, Breathitt, Carter, Casey, Clark and 30 more2 hr
Jul 26, 6:26 PM EDTSevere Thunderstorm WatchSPCBath, Boyd, Breathitt, Carter, Clay, Elliott and 24 more7 hr
Jul 26, 7:29 PM EDTMesoscale DiscussionSPCBallard, Caldwell, Calloway, Carlisle, Crittenden, Fulton and 10 more61 min
Jul 26, 3:08 PM EDTMesoscale DiscussionSPCAnne Arundel, Baltimore, Calvert, Caroline, Carroll, Charles and 14 more2 hr
Jul 26, 5:54 PM EDTSevere Thunderstorm WatchSPCAllegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 17 more6 hr
Jul 26, 1:15 AM EDTMesoscale DiscussionSPCAshtabula, Columbiana, Cuyahoga, Geauga, Lake, Mahoning and 5 more2 hr
Jul 26, 4:31 AM EDTMesoscale DiscussionSPCAshtabula, Belmont, Jefferson, Monroe89 min
Jul 26, 1:50 PM EDTMesoscale DiscussionSPCBradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more115 min
Jul 26, 2:10 PM EDTTornado WatchSPCBradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more6 hr
Jul 26, 3:57 PM EDTSevere Thunderstorm WatchSPCBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more6 hr
Jul 26, 6:04 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Dauphin, Delaware and 15 more86 min
Jul 26, 7:28 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Philadelphia92 min

Nearby

Mesoscale Discussions in West Virginia, 2012Mesoscale Discussions in Ohio, 2012Mesoscale Discussions in Pennsylvania, 2012Every mesoscale discussion 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.