Alert archive / Maryland / Mesoscale Discussions in 2003

Mesoscale Discussion 2318

August 29, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Aug 29, 2003, 7:29 PM EDT for 4 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Aug 29, 2003, 7:29 PM EDT (23:29 UTC)
Expired: Aug 29, 2003, 8:30 PM EDT
In force: 61 min
Issued by: the Storm Prediction Center

All 28 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Anne Arundel County, MD, Calvert County, MD, Caroline County, MD, Charles County, MD, Dorchester County, MD, Kent County, MD, Prince George's County, MD, Queen Anne's County, MD, Talbot County, MD, Wicomico County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ, Arlington County, VA, City of Alexandria, VA, City of Fredericksburg, VA, King George County, VA, Prince William County, VA, Stafford County, VA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.5 hours before the alert went out and 145 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: 1493 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 677 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

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 29, 2:59 PM EDT	Mesoscale Discussion	SPC	Kent, New Castle	3 hr
Aug 29, 3:50 PM EDT	Severe Thunderstorm Watch	SPC	New Castle	5 hr

Nearby

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