Alert archive / Virginia / Mesoscale Discussions in 2005

Mesoscale Discussion 1206

June 6, 20055 states

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2005, 5:00 PM EDT for 5 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2005, 5:00 PM EDT (21:00 UTC)
Expired: Jun 6, 2005, 6:30 PM EDT
In force: 90 min
Issued by: the Storm Prediction Center

All 59 counties

New Castle County, DE, Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Carroll County, MD, Cecil County, MD, City of Baltimore, MD, Frederick County, MD, Garrett County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Prince George's County, MD, Queen Anne's County, MD, Washington County, MD, Adams County, PA, Bedford County, PA, Chester County, PA, Cumberland County, PA, Delaware County, PA, Fayette County, PA, Franklin County, PA, Fulton County, PA, Greene County, PA, Lancaster County, PA, Montgomery County, PA, Somerset County, PA, Westmoreland County, PA, York County, PA, Arlington County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, City of Manassas, VA, City of Manassas Park, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Loudoun County, VA, Page County, VA, Prince William County, VA, Rappahannock County, VA, Shenandoah County, VA, Warren County, VA, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mineral County, WV, Monongalia County, WV, Morgan County, WV, Pendleton County, WV, Preston County, WV, Tucker County, WV

The radar

The Sterling radar (KLWX), 69 km from the middle of the area, began a volume at 21:03 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.0 hours before the alert went out and 75 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: 1094 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1190 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 46 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.

Issued	Product	Office	Counties	Lasted
Jun 6, 1:55 PM EDT	Severe Thunderstorm Watch	SPC	Kent, New Castle	8 hr
Jun 6, 6:34 PM EDT	Mesoscale Discussion	SPC	Kent, New Castle	86 min
Jun 6, 12:46 PM EDT	Mesoscale Discussion	SPC	Allegany, Garrett	59 min
Jun 6, 1:00 PM EDT	Severe Thunderstorm Watch	SPC	Garrett	7 hr
Jun 6, 1:34 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 5 more	56 min
Jun 6, 5:32 PM EDT	Mesoscale Discussion	SPC	Garrett	88 min
Jun 5, 10:28 PM EDT	Mesoscale Discussion	SPC	Beaver, Crawford, Erie, Lawrence, Mercer	92 min
Jun 6, 8:35 AM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Blair, Butler, Cambria and 19 more	115 min
Jun 6, 9:30 AM EDT	Severe Thunderstorm Watch	SPC	Bedford, Blair, Bradford, Cambria, Cameron, Carbon and 28 more	9 hr
Jun 6, 10:28 AM EDT	Mesoscale Discussion	SPC	Adams, Berks, Blair, Bradford, Bucks, Carbon and 33 more	62 min
Jun 6, 12:30 PM EDT	Tornado Watch	SPC	Bradford, Columbia, Lackawanna, Luzerne, Montour, Sullivan and 3 more	6 hr
Jun 6, 4:35 PM EDT	Mesoscale Discussion	SPC	Bucks, Chester, Delaware, Lancaster, Montgomery, Philadelphia and 1 more	55 min

Nearby

Mesoscale Discussions in Virginia, 2005 Mesoscale Discussions in Maryland, 2005 Mesoscale Discussions in Pennsylvania, 2005 Every mesoscale discussion in 2005

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.