Alert archive / Virginia / Mesoscale Discussions in 2013

Mesoscale Discussion 2001

November 1, 20135 states

The Storm Prediction Center issued this mesoscale discussion at Nov 1, 2013, 3:37 AM EDT for 5 states. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Nov 1, 2013, 3:37 AM EDT (07:37 UTC)
Expired
Nov 1, 2013, 5:00 AM EDT
In force
83 min
Issued by
the Storm Prediction Center
All 137 counties

Bell County, KY, Floyd County, KY, Harlan County, KY, Knott County, KY, Letcher County, KY, Martin County, KY, Pike County, KY, Allegany County, MD, Carroll County, MD, Frederick County, MD, Garrett County, MD, Washington County, MD, Adams County, PA, Armstrong County, PA, Bedford County, PA, Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Elk County, PA, Fayette County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lebanon County, PA, Luzerne County, PA, Lycoming County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Potter County, PA, Schuylkill County, PA, Snyder County, PA, Somerset County, PA, Sullivan County, PA, Union County, PA, Westmoreland County, PA, York County, PA, Albemarle County, VA, Alleghany County, VA, Amherst County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buchanan County, VA, Carroll County, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Norton, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Craig County, VA, Dickenson County, VA, Fauquier County, VA, Floyd County, VA, Franklin County, VA, Frederick County, VA, Giles County, VA, Grayson County, VA, Greene County, VA, Highland County, VA, Lee County, VA, Loudoun County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Page County, VA, Pulaski County, VA, Rappahannock County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Russell County, VA, Scott County, VA, Shenandoah County, VA, Smyth County, VA, Tazewell County, VA, Warren County, VA, Washington County, VA, Wise County, VA, Wythe County, VA, Barbour County, WV, Berkeley County, WV, Boone County, WV, Braxton County, WV, Clay County, WV, Fayette County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Jefferson County, WV, Kanawha County, WV, Lewis County, WV, Logan County, WV, Marion County, WV, McDowell County, WV, Mercer County, WV, Mineral County, WV, Mingo County, WV, Monongalia County, WV, Monroe County, WV, Morgan County, WV, Nicholas County, WV, Pendleton County, WV, Pocahontas County, WV, Preston County, WV, Raleigh County, WV, Randolph County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Upshur County, WV, Webster County, WV, Wyoming County, WV

The radar

The Pittsburgh radar (KPBZ), 141 km from the middle of the area, began a volume at 07:41 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 (KAGC), launched 00:00Z, 7.6 hours before the alert went out and 125 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 2013-11-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2013-11-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 817 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
643 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
817 m²/s²
0-3 km storm-relative helicity
902 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Oct 31, 8:39 PM EDTMesoscale DiscussionSPCAdair, Allen, Barren, Butler, Calloway, Christian and 13 more66 min
Oct 31, 8:44 PM EDTMesoscale DiscussionSPCBallard, Breckinridge, Bullitt, Caldwell, Carlisle, Crittenden and 17 more2 hr
Oct 31, 8:54 PM EDTTornado WatchSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 29 more5 hr
Oct 31, 9:53 PM EDTMesoscale DiscussionSPCBoone, Bourbon, Bracken, Campbell, Carroll, Fleming and 11 more2 hr
Oct 31, 10:09 PM EDTSevere Thunderstorm WatchSPCBoone, Boyd, Bracken, Campbell, Carroll, Carter and 9 more6 hr
Oct 31, 11:11 PM EDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Breckinridge, Bullitt and 33 more64 min
Nov 1, 12:39 AM EDTMesoscale DiscussionSPCBracken, Campbell, Gallatin, Grant, Greenup, Harrison and 7 more96 min
Nov 1, 12:46 AM EDTSevere Thunderstorm WatchSPCBath, Bell, Breathitt, Clay, Elliott, Estill and 28 more5 hr
Nov 1, 4:17 AM EDTSevere Thunderstorm WatchSPCAllegany, Carroll, Frederick, Washington4 hr
Nov 1, 5:41 AM EDTMesoscale DiscussionSPCCarroll, Washington94 min
Nov 1, 6:25 AM EDTSevere Thunderstorm WatchSPCBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more5 hr
Nov 1, 8:34 AM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Northampton, Philadelphia86 min

Nearby

Mesoscale Discussions in Virginia, 2013Mesoscale Discussions in Pennsylvania, 2013Mesoscale Discussions in West Virginia, 2013Every mesoscale discussion in 2013

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.