Alert archive / South Carolina / Mesoscale Discussions in 2011

Mesoscale Discussion 1294

June 19, 201122 counties in North Carolina; 27 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2011, 1:29 PM EDT for 22 counties in North Carolina; 27 counties in South Carolina. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
Jun 19, 2011, 1:29 PM EDT (17:29 UTC)
Expired
Jun 19, 2011, 2:30 PM EDT
In force
61 min
Issued by
the Storm Prediction Center
All 49 counties

Anson County, NC, Bladen County, NC, Burke County, NC, Cabarrus County, NC, Catawba County, NC, Cleveland County, NC, Columbus County, NC, Gaston County, NC, Henderson County, NC, Hoke County, NC, Lincoln County, NC, McDowell County, NC, Mecklenburg County, NC, Montgomery County, NC, Polk County, NC, Richmond County, NC, Robeson County, NC, Rutherford County, NC, Scotland County, NC, Stanly County, NC, Transylvania County, NC, Union County, NC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Greenville County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC

The radar

The Columbia radar (KCAE), 76 km from the middle of the area, began a volume at 17:31 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 5.5 hours before the alert went out and 186 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, Greensboro/Hi Pt, NC at 12:00Z on 2011-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 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, Greensboro/Hi Pt, NC at 12:00Z on 2011-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 151 square meters per square second.19395878Sfc1 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
35 J/kg
Mixed-layer CIN
-220 J/kg
Mixed-layer LCL
1343 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
151 m²/s²
0-3 km storm-relative helicity
249 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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.

IssuedProductOfficeCountiesLasted
Jun 19, 8:51 AM EDTMesoscale DiscussionSPCCherokee, Graham, Swain114 min
Jun 19, 1:23 PM EDTMesoscale DiscussionSPCCherokee, Clay, Graham, Haywood, Swain67 min
Jun 19, 1:52 PM EDTTornado WatchSPCCherokee, Clay8 hr
Jun 19, 2:22 PM EDTSevere Thunderstorm WatchSPCAnson, Bladen, Brunswick, Buncombe, Burke, Cabarrus and 36 more5 hr
Jun 19, 4:13 PM EDTMesoscale DiscussionSPCAnson, Bladen, Brunswick, Buncombe, Burke, Cabarrus and 35 more62 min
Jun 18, 9:03 PM EDTMesoscale DiscussionSPCAllendale, Bamberg, Barnwell, Beaufort, Berkeley, Calhoun and 10 more87 min
Jun 19, 6:58 PM EDTMesoscale DiscussionSPCAbbeville, Anderson, Calhoun, Cherokee, Chester, Chesterfield and 20 more62 min

Nearby

Mesoscale Discussions in South Carolina, 2011Mesoscale Discussions in North Carolina, 2011Every 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.