Alert archive / Pennsylvania / Mesoscale Discussions in 2003

Mesoscale Discussion 2545

November 19, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Nov 19, 2003, 2:56 PM EST for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Nov 19, 2003, 2:56 PM EST (19:56 UTC)
Expired: Nov 19, 2003, 5:00 PM EST
In force: 2 hr
Issued by: the Storm Prediction Center

All 32 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Anne Arundel County, MD, Baltimore County, MD, Caroline County, MD, Cecil County, MD, City of Baltimore, MD, Harford County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Salem County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA, Schuylkill County, PA

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.9 hours before the alert went out and 20 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: 17 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 571 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 237 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
Nov 19, 12:45 PM EST	Tornado Watch	SPC	Kent, New Castle, Sussex	5 hr
Nov 19, 8:50 AM EST	Tornado Watch	SPC	Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Cecil and 10 more	6 hr
Nov 19, 10:57 AM EST	Mesoscale Discussion	SPC	Dorchester, Somerset, Wicomico	93 min
Nov 19, 11:25 AM EST	Tornado Watch	SPC	Dorchester, Saint Mary's, Somerset, Wicomico, Worcester	6 hr
Nov 19, 12:47 PM EST	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 5 more	118 min
Nov 19, 2:27 PM EST	Mesoscale Discussion	SPC	Saint Mary's, Somerset, Worcester	93 min
Nov 19, 3:59 PM EST	Mesoscale Discussion	SPC	Somerset, Worcester	61 min

Nearby

Mesoscale Discussions in Pennsylvania, 2003 Mesoscale Discussions in Maryland, 2003 Mesoscale Discussions in New Jersey, 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.