Alert archive / Maryland / Mesoscale Discussions in 2003

Mesoscale Discussion 2271

August 26, 2003Sussex County, Delaware; 11 counties in Maryland; 8 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2003, 4:45 PM EDT for Sussex County, Delaware; 11 counties in Maryland; 8 counties in Virginia. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Aug 26, 2003, 4:45 PM EDT (20:45 UTC)
Expired: Aug 26, 2003, 6:15 PM EDT
In force: 90 min
Issued by: the Storm Prediction Center

Counties Sussex County, DE, Calvert County, MD, Caroline County, MD, Charles County, MD, Dorchester County, MD, Prince George's County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Somerset County, MD, Talbot County, MD, Wicomico County, MD, Worcester County, MD, Accomack County, VA, Lancaster County, VA, Mathews County, VA, Middlesex County, VA, Northampton County, VA, Northumberland County, VA, Richmond County, VA, Westmoreland County, VA

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.8 hours before the alert went out and 89 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: 1276 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1027 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 37 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, 2:55 PM EDT	Severe Thunderstorm Watch	SPC	Kent, New Castle, Sussex	5 hr
Aug 26, 5:48 PM EDT	Mesoscale Discussion	SPC	Sussex	57 min
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, 2:19 PM EDT	Mesoscale Discussion	SPC	Allegany, Anne Arundel, Calvert, Charles, Frederick, Garrett and 5 more	116 min

Nearby

Mesoscale Discussions in Maryland, 2003 Mesoscale Discussions in Virginia, 2003 Mesoscale Discussions in Delaware, 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.