Alert archive / North Carolina / Mesoscale Discussions in 2011

Mesoscale Discussion 695

May 3, 20114 states

The Storm Prediction Center issued this mesoscale discussion at May 3, 2011, 7:22 PM EDT for 4 states. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: May 3, 2011, 7:22 PM EDT (23:22 UTC)
Expired: May 3, 2011, 8:45 PM EDT
In force: 83 min
Issued by: the Storm Prediction Center

All 59 counties

Elbert County, GA, Lincoln County, GA, Wilkes County, GA, Alamance County, NC, Alexander County, NC, Alleghany County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Caswell County, NC, Catawba County, NC, Cleveland County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Gaston County, NC, Guilford County, NC, Iredell County, NC, Lincoln County, NC, McDowell County, NC, Mecklenburg County, NC, Montgomery County, NC, Polk County, NC, Randolph County, NC, Rockingham County, NC, Rowan County, NC, Rutherford County, NC, Stanly County, NC, Stokes County, NC, Surry County, NC, Union County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Edgefield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Lancaster County, SC, Laurens County, SC, McCormick County, SC, Newberry County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC, Carroll County, VA, City of Danville, VA, City of Galax, VA, City of Martinsville, VA, Floyd County, VA, Franklin County, VA, Henry County, VA, Patrick County, VA, Pittsylvania County, VA

The radar

The Greer radar (KGSP), 131 km from the middle of the area, began a volume at 23:24 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.4 hours before the alert went out and 119 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: 3 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 482 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 129 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
May 3, 4:57 PM EDT	Mesoscale Discussion	SPC	Baldwin, Bibb, Bleckley, Burke, Butts, Clarke and 45 more	93 min
May 3, 3:47 PM EDT	Severe Thunderstorm Watch	SPC	Clarke, Frederick, City of Winchester	6 hr
May 3, 6:51 PM EDT	Mesoscale Discussion	SPC	Clarke, Frederick, City of Winchester	84 min

Nearby

Mesoscale Discussions in North Carolina, 2011 Mesoscale Discussions in South Carolina, 2011 Mesoscale Discussions in Virginia, 2011 Every mesoscale discussion in 2011

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; radar from the NEXRAD Level II archive.