Alert archive / North Carolina / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 512

June 19, 201117 counties in Georgia; 42 counties in North Carolina; 36 counties in South Carolina

The Storm Prediction Center issued this severe thunderstorm watch at Jun 19, 2011, 2:22 PM EDT for 17 counties in Georgia; 42 counties in North Carolina; 36 counties in South Carolina. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 19, 2011, 2:22 PM EDT (18:22 UTC)
Expired
Jun 19, 2011, 7:20 PM EDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 95 counties

Catoosa County, GA, Dade County, GA, Elbert County, GA, Fannin County, GA, Franklin County, GA, Gilmer County, GA, Habersham County, GA, Hart County, GA, Lumpkin County, GA, Murray County, GA, Rabun County, GA, Stephens County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Anson County, NC, Bladen County, NC, Brunswick County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Catawba County, NC, Chatham County, NC, Cleveland County, NC, Columbus County, NC, Cumberland County, NC, Davidson County, NC, Davie County, NC, Gaston County, NC, Graham County, NC, Harnett County, NC, Haywood County, NC, Henderson County, NC, Hoke County, NC, Iredell County, NC, Jackson County, NC, Lee County, NC, Lincoln County, NC, Macon County, NC, McDowell County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, New Hanover County, NC, Pender County, NC, Polk County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rowan County, NC, Rutherford County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Swain County, NC, Transylvania County, NC, Union County, NC, Abbeville County, SC, Anderson County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Greenville County, SC, Greenwood 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, Oconee County, SC, Orangeburg County, SC, Pickens 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 Greer radar (KGSP), 58 km from the middle of the area, began a volume at 18:25 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
70%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 19, 3:15 PM EDTSevere Thunderstorm WarningILMHorry, Marion60 min
Jun 19, 4:31 PM EDTSevere Thunderstorm WarningGSPGreenville, Pickens59 min
Jun 19, 4:47 PM EDTSevere Thunderstorm WarningGSPLaurens, Spartanburg, Union58 min
Jun 19, 5:04 PM EDTSevere Thunderstorm WarningGSPGreenville, Laurens, Spartanburg56 min
Jun 19, 5:22 PM EDTTornado WarningGSPGreenville, Laurens, Spartanburg23 min
Jun 19, 5:42 PM EDTSevere Thunderstorm WarningGSPLaurens, Spartanburg, Union36 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.4 hours before the alert went out and 193 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

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 18, 9:03 PM EDTMesoscale DiscussionSPCAppling, Ben Hill, Bryan, Bulloch, Burke, Candler and 20 more87 min
Jun 19, 4:13 PM EDTMesoscale DiscussionSPCCatoosa, Dade, Elbert, Fannin, Franklin, Gilmer and 11 more62 min
Jun 19, 6:58 PM EDTMesoscale DiscussionSPCFranklin, Habersham, Hart, Rabun, Stephens62 min
Jun 19, 8:51 AM EDTMesoscale DiscussionSPCCherokee, Graham, Swain114 min
Jun 19, 1:23 PM EDTMesoscale DiscussionSPCCherokee, Clay, Graham, Haywood, Swain67 min
Jun 19, 1:29 PM EDTMesoscale DiscussionSPCAnson, Bladen, Burke, Cabarrus, Catawba, Cleveland and 16 more61 min
Jun 19, 1:52 PM EDTTornado WatchSPCCherokee, Clay8 hr
Jun 19, 3:14 AM EDTMesoscale DiscussionSPCBenton, Carroll, Cheatham, Crockett, Dickson, Dyer and 10 more61 min
Jun 19, 5:39 AM EDTMesoscale DiscussionSPCMacon, Montgomery, Robertson66 min
Jun 19, 4:12 PM EDTMesoscale DiscussionSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Cannon and 32 more2 hr
Jun 19, 5:30 PM EDTMesoscale DiscussionSPCCheatham, Clay, Davidson, Fentress, Houston, Jackson and 13 more30 min
Jun 19, 6:01 PM EDTTornado WatchSPCBenton, Cannon, Cheatham, Clay, Cumberland, Davidson and 23 more5 hr
Jun 19, 7:18 PM EDTMesoscale DiscussionSPCAnderson, Campbell, Claiborne, Clay, Cumberland, Davidson and 20 more57 min

Nearby

Severe Thunderstorm Watches in North Carolina, 2011Severe Thunderstorm Watches in South Carolina, 2011Severe Thunderstorm Watches in Georgia, 2011Every severe thunderstorm watch 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.