Alert archive / Virginia / Mesoscale Discussions in 2003

Mesoscale Discussion 2267

August 26, 20035 states

The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2003, 2:19 PM EDT for 5 states. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Aug 26, 2003, 2:19 PM EDT (18:19 UTC)
Expired: Aug 26, 2003, 4:15 PM EDT
In force: 116 min
Issued by: the Storm Prediction Center

All 66 counties

Allegany County, MD, Anne Arundel County, MD, Calvert County, MD, Charles County, MD, Frederick County, MD, Garrett County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Saint Mary's County, MD, Washington County, MD, Monroe County, OH, Noble County, OH, Bedford County, PA, Fulton County, PA, Arlington County, VA, Caroline County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Essex County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Greene County, VA, King George County, VA, Loudoun County, VA, Madison County, VA, Orange County, VA, Page County, VA, Prince William County, VA, Rappahannock County, VA, Richmond County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Westmoreland County, VA, Barbour County, WV, Berkeley County, WV, Doddridge County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Jefferson County, WV, Lewis County, WV, Marion County, WV, Mineral County, WV, Morgan County, WV, Pendleton County, WV, Preston County, WV, Randolph County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wetzel County, WV

The radar

The Sterling radar (KLWX), 91 km from the middle of the area, began a volume at 18:20 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.

Severe Thunderstorm Watch 894Aug 26, 2:55 PM EDT

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.3 hours before the alert went out and 99 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: 247 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 1213 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 68 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
Aug 26, 11:08 AM EDT	Mesoscale Discussion	SPC	Allegany, Garrett, Washington	2 hr
Aug 26, 1:05 PM EDT	Severe Thunderstorm Watch	SPC	Allegany, Carroll, Garrett, Washington	5 hr
Aug 26, 2:55 PM EDT	Severe Thunderstorm Watch	SPC	Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 11 more	5 hr
Aug 26, 4:45 PM EDT	Mesoscale Discussion	SPC	Calvert, Caroline, Charles, Dorchester, Prince George's, Queen Anne's and 5 more	90 min
Aug 26, 5:48 PM EDT	Mesoscale Discussion	SPC	Calvert, Caroline, Charles, Dorchester, Prince George's, Queen Anne's and 5 more	57 min
Aug 26, 12:27 AM EDT	Mesoscale Discussion	SPC	Ashtabula, Carroll, Columbiana, Cuyahoga, Erie, Geauga and 14 more	63 min
Aug 26, 8:30 AM EDT	Mesoscale Discussion	SPC	Ashland, Ashtabula, Cuyahoga, Erie, Geauga, Hancock and 12 more	2 hr
Aug 26, 9:10 AM EDT	Severe Thunderstorm Watch	SPC	Allen, Ashland, Ashtabula, Auglaize, Columbiana, Crawford and 35 more	5 hr
Aug 26, 3:46 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Belmont, Carroll, Champaign and 37 more	119 min
Aug 26, 4:25 PM EDT	Severe Thunderstorm Watch	SPC	Allen, Ashland, Auglaize, Belmont, Carroll, Columbiana and 39 more	6 hr
Aug 26, 6:18 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Belmont, Carroll, Columbiana and 35 more	57 min
Aug 26, 7:55 PM EDT	Mesoscale Discussion	SPC	Ashland, Belmont, Carroll, Columbiana, Coshocton, Delaware and 21 more	65 min

Nearby

Mesoscale Discussions in Virginia, 2003 Mesoscale Discussions in West Virginia, 2003 Mesoscale Discussions in Maryland, 2003 Every mesoscale discussion in 2003

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.