Alert archive / Virginia / Mesoscale Discussions in 2003

Mesoscale Discussion 2543

November 19, 200311 counties in Maryland; 44 counties in Virginia; Jefferson County, West Virginia

The Storm Prediction Center issued this mesoscale discussion at Nov 19, 2003, 12:47 PM EST for 11 counties in Maryland; 44 counties in Virginia; Jefferson County, West Virginia. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued
Nov 19, 2003, 12:47 PM EST (17:47 UTC)
Expired
Nov 19, 2003, 2:45 PM EST
In force
118 min
Issued by
the Storm Prediction Center
All 56 counties

Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, Charles County, MD, City of Baltimore, MD, Frederick County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Washington County, MD, Amelia County, VA, Arlington County, VA, Brunswick County, VA, Caroline County, VA, Chesterfield County, VA, City of Alexandria, VA, City of Colonial Heights, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Hopewell, VA, City of Manassas, VA, City of Manassas Park, VA, City of Petersburg, VA, City of Richmond, VA, Clarke County, VA, Culpeper County, VA, Cumberland County, VA, Dinwiddie County, VA, Essex County, VA, Fairfax County, VA, Fauquier County, VA, Fluvanna County, VA, Goochland County, VA, Hanover County, VA, Henrico County, VA, King George County, VA, King William County, VA, Loudoun County, VA, Louisa County, VA, Lunenburg County, VA, Madison County, VA, Mecklenburg County, VA, Nottoway County, VA, Orange County, VA, Powhatan County, VA, Prince Edward County, VA, Prince George County, VA, Prince William County, VA, Rappahannock County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Westmoreland County, VA, Jefferson County, WV

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.8 hours before the alert went out and 87 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, Washington/Dulle, VA at 12:00Z on 2003-11-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 64 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, Washington/Dulle, VA at 12:00Z on 2003-11-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 313 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
64 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
498 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
313 m²/s²
0-3 km storm-relative helicity
347 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
Nov 19, 8:50 AM ESTTornado WatchSPCAllegany, Anne Arundel, Baltimore, Calvert, Carroll, Cecil and 10 more6 hr
Nov 19, 10:57 AM ESTMesoscale DiscussionSPCDorchester, Somerset, Wicomico93 min
Nov 19, 11:25 AM ESTTornado WatchSPCDorchester, Saint Mary's, Somerset, Wicomico, Worcester6 hr
Nov 19, 12:45 PM ESTTornado WatchSPCAnne Arundel, Baltimore, Caroline, Cecil, Harford, Kent and 3 more5 hr
Nov 19, 2:27 PM ESTMesoscale DiscussionSPCSaint Mary's, Somerset, Worcester93 min
Nov 19, 2:56 PM ESTMesoscale DiscussionSPCAnne Arundel, Baltimore, Caroline, Cecil, Harford, Kent and 3 more2 hr
Nov 19, 3:59 PM ESTMesoscale DiscussionSPCSomerset, Worcester61 min
Nov 19, 6:31 AM ESTMesoscale DiscussionSPCCarroll, Grayson, Henry, Patrick, City of Danville, City of Galax and 1 more119 min
Nov 19, 8:10 AM ESTMesoscale DiscussionSPCAlbemarle, Alleghany, Amelia, Amherst, Appomattox, Arlington and 53 more3 hr
Nov 19, 11:29 AM ESTMesoscale DiscussionSPCBland, Buchanan, Dickenson, Grayson, Lee, Russell and 8 more61 min

Nearby

Mesoscale Discussions in Virginia, 2003Mesoscale Discussions in Maryland, 2003Mesoscale Discussions in West Virginia, 2003Every 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.