Alert archive / North Carolina / Mesoscale Discussions in 2003

Mesoscale Discussion 1124

May 25, 200312 counties in North Carolina; 5 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at May 25, 2003, 9:39 PM EDT for 12 counties in North Carolina; 5 counties in Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 25, 2003, 9:39 PM EDT (01:39 UTC)
Expired
May 25, 2003, 11:45 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Alamance County, NC, Caswell County, NC, Davie County, NC, Forsyth County, NC, Granville County, NC, Guilford County, NC, Northampton County, NC, Person County, NC, Rockingham County, NC, Stokes County, NC, Vance County, NC, Warren County, NC, Brunswick County, VA, City of Danville, VA, City of Emporia, VA, Greensville County, VA, Mecklenburg County, VA

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 1.7 hours before the alert went out and 104 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, Roanoke, VA at 00:00Z on 2003-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 77 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, Roanoke, VA at 00:00Z on 2003-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
77 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
953 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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Nearby

Mesoscale Discussions in North Carolina, 2003Mesoscale Discussions in 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.