Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 113, NWS Charleston, SC

June 18, 2011Effingham County, Screven County, Georgia; 5 counties in South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Jun 18, 2011, 9:34 PM EDT for Effingham County, Screven County, Georgia; 5 counties in South Carolina. It was in force for 56 min. 7 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 18, 2011, 9:34 PM EDT (01:34 UTC)
Expired
Jun 18, 2011, 10:30 PM EDT
In force
56 min
Issued by
NWS Charleston, SC
Area
Storm-based polygon

Counties Effingham County, GA, Screven County, GA, Allendale County, SC, Beaufort County, SC, Colleton County, SC, Hampton County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 38 km from the middle of the area, began a volume at 01:34 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 was reported inside it

TimeReportWhereRemark
Jun 18, 9:42 PM EDTTSTM WND DMGVarnville, SCNUMEROUS REPORTS OF TREES DOWN ALONG YEMASSEE HWY AND WALTERBORO HWY. TIME ESTIMATED BY RADAR.
Jun 18, 10:00 PM EDTTSTM WND DMGGrays, SCCOUNTY OFFICIALS RELAYED NUMEROUS REPORTS OF TREES DOWN. TIME ESTIMATED BY RADAR.
Jun 18, 10:01 PM EDTTSTM WND DMG1 E Yemassee, SCDISPATCH CENTER REPORTED TREES DOWN AT LA CREUSET RD AND RIVER RD.
Jun 18, 10:01 PM EDTTSTM WND DMG1 Se Yemassee, SCDISPATCH CENTER REPORTED TREES DOWN NEAR OLD SHELDON CHURCH AND CASTLE HALL RD.
Jun 18, 10:09 PM EDTTSTM WND DMG4 N Gardens Corner, SCDISPATCH CENTER REPORTED TREES DOWN NEAR BIG ESTATE RD AND RIVER RD.
Jun 18, 10:10 PM EDTTSTM WND DMG4 Sse Egypt, GADISPATCH CENTER REPORTED TREE DOWN ON GA HWY 17N NEAR HARRY LINDSAY RD.
Jun 18, 10:10 PM EDTTSTM WND DMGSheldon, SCDISPATCH CENTER REPORTED TREES DOWN ON BAILEY RD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 18, 7:20 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 1.6 hours before the alert went out and 139 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, Charleston AFB, SC at 00:00Z on 2011-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1855 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, Charleston AFB, SC at 00:00Z on 2011-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.193958Sfc1 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
1855 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1399 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
82 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.

182 
WUUS52 KCHS 190134
SVRCHS
GAC103-251-SCC005-013-029-049-053-190230-
/O.NEW.KCHS.SV.W.0113.110619T0134Z-110619T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
934 PM EDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN SCREVEN COUNTY IN EAST CENTRAL GEORGIA...
  NORTHERN EFFINGHAM COUNTY IN SOUTHEAST GEORGIA...
  NORTH CENTRAL BEAUFORT COUNTY IN SOUTHERN SOUTH CAROLINA...
  WEST CENTRAL COLLETON COUNTY IN SOUTHERN SOUTH CAROLINA...
  HAMPTON COUNTY IN SOUTHERN SOUTH CAROLINA...
  NORTHERN JASPER COUNTY IN SOUTHERN SOUTH CAROLINA...
  SOUTH CENTRAL ALLENDALE COUNTY IN WEST CENTRAL SOUTH CAROLINA...

* UNTIL 1030 PM EDT

* AT 933 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS...ALONG A LINE EXTENDING FROM MILEY TO 12
  MILES WEST OF GIFFORD TO 15 MILES NORTHWEST OF CAPTOLO...MOVING
  SOUTHEAST AT 55 MPH.

  PREPARE NOW FOR THE FOLLOWING HAZARDS...
  DAMAGING WINDS IN EXCESS OF 60 MPH...

* SOME LOCATIONS IN THE WARNING INCLUDE...
  MILEY...GIFFORD...LURAY...LAKE WARREN STATE PARK...VARNVILLE...
  LENA...SHIRLEY...SCOTIA...GRAYS...GARNETT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT HAIL...DOWNED TREES...LIMBS...AND POWER LINES DIRECTLY TO THE
CHARLESTON NATIONAL WEATHER SERVICE AT 1-888-383-2024.

&&

LAT...LON 3266 8177 3279 8140 3298 8102 3266 8073
      3260 8075 3233 8147 3236 8151 3242 8154
      3244 8153 3247 8154 3248 8154 3251 8158
      3251 8160 3255 8169
TIME...MOT...LOC 0134Z 294DEG 46KT 3297 8105 3283 8138
          3269 8178

$$
1 follow-up statement
030 
WWUS52 KCHS 190159
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
959 PM EDT SAT JUN 18 2011

GAC103-251-SCC005-013-029-049-053-190230-
/O.CON.KCHS.SV.W.0113.000000T0000Z-110619T0230Z/
SCREVEN GA-ALLENDALE SC-EFFINGHAM GA-BEAUFORT SC-HAMPTON SC-JASPER SC-
COLLETON SC-
959 PM EDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR WEST CENTRAL COLLETON...NORTHERN JASPER...HAMPTON...NORTH CENTRAL
BEAUFORT...NORTHERN EFFINGHAM...SOUTH CENTRAL ALLENDALE AND SOUTHERN
SCREVEN COUNTIES...

AT 957 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 8 MILES NORTHEAST OF EARLY BRANCH TO
GRAYS TO COOPERVILLE...OR ALONG A LINE EXTENDING FROM 11 MILES NORTH
OF YEMASSEE TO 11 MILES WEST OF YEMASSEE TO 10 MILES SOUTH OF
SYLVANIA...MOVING SOUTHEAST AT 55 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...CAPTOLO...
CLYO...EGYPT...HUNTERS...KILDARE...NEWINGTON...OLIVER...SHAWNEE...
ALMEDA INTERSECTION...COOSAWHATCHIE...CROCKETVILLE...CUMMINGS...EARLY
BRANCH...ESTILL...FURMAN...GARDENS CORNER...GARNETT...GIFFORD...
GILLISONVILLE...GRAYS...HAMPTON...LAKE WARREN STATE PARK...LENA...
LURAY...MCPHERSONVILLE...MILEY...PINELAND...POCOTALIGO...
ROBERTVILLE...SCOTIA...SHELDON...SHIRLEY...TARBORO...VARNVILLE AND
YEMASSEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE HAD A HISTORY OF PRODUCING DAMAGING WINDS.  SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3266 8177 3279 8140 3298 8102 3266 8073
      3260 8075 3233 8147 3236 8151 3242 8154
      3244 8153 3247 8154 3248 8154 3251 8158
      3251 8160 3255 8169
TIME...MOT...LOC 0159Z 294DEG 46KT 3284 8084 3267 8102
          3259 8163

$$

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 18, 8:52 PM EDTSevere Thunderstorm WarningCHSBulloch, Candler, Jenkins, Screven53 min
Jun 18, 9:45 PM EDTSevere Thunderstorm WarningCHSBulloch, Candler, Evans, Jenkins, Tattnall60 min
Jun 18, 9:55 PM EDTSpecial Weather StatementCHSEvans, Tattnall50 min
Jun 18, 10:05 PM EDTSevere Thunderstorm WarningCHSEvans, Liberty, Long, Tattnall55 min
Jun 18, 10:11 PM EDTSevere Thunderstorm WarningCHSChatham, Effingham64 min
Jun 18, 10:25 PM EDTSpecial Marine WarningCHS95 min
Jun 18, 10:37 PM EDTSevere Thunderstorm WarningCHSBryan, Bulloch, Chatham, Effingham, Liberty53 min
Jun 18, 10:58 PM EDTSevere Thunderstorm WarningCHSLiberty, Long, McIntosh62 min
Jun 18, 11:05 PM EDTSpecial Marine WarningCHS43 min
Jun 18, 11:15 PM EDTSevere Thunderstorm WarningCHSChatham, Effingham60 min
Jun 18, 11:27 PM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Effingham, Liberty50 min
Jun 18, 11:39 PM EDTSpecial Marine WarningCHS66 min
Jun 18, 11:59 PM EDTSpecial Marine WarningCHS102 min
Jun 19, 4:14 AM EDTHeat AdvisoryCHSBulloch, Candler, Effingham, Evans, Jenkins, Long and 2 more16 hr
Jun 18, 9:12 PM EDTSevere Thunderstorm WarningCHSColleton, Dorchester63 min
Jun 18, 10:17 PM EDTSevere Thunderstorm WarningCHSBerkeley, Charleston, Colleton, Dorchester58 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2011Severe Thunderstorm Warnings in Georgia, 2011Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.