Alert archive / South Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 47, NWS Charleston, SC

April 5, 20124 counties in South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Apr 5, 2012, 6:51 PM EDT for 4 counties in South Carolina. It was in force for 54 min. 2 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
Apr 5, 2012, 6:51 PM EDT (22:51 UTC)
Expired
Apr 5, 2012, 7:45 PM EDT
In force
54 min
Issued by
NWS Charleston, SC
Area
Storm-based polygon

Counties Beaufort County, SC, Charleston County, SC, Colleton County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 59 km from the middle of the area, began a volume at 22:53 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
Apr 5, 6:51 PM EDTTSTM WND DMGSheldon, SC3 TO 4 TRESS DOWN IN THE SHELDON AREA. TIME BASED ON RADAR.
Apr 5, 7:19 PM EDTTSTM WND DMGGreen Pond, SCMULTIPLE TREES DOWN IN THE GREEN POND AREA. TIME ESTIMATED FROM RADAR.

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
Apr 5, 1:47 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 10.9 hours before the alert went out and 59 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 12:00Z on 2012-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 490 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2012-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 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
490 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
1016 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
50 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.

239 
WUUS52 KCHS 052251
SVRCHS
SCC013-019-029-053-052345-
/O.NEW.KCHS.SV.W.0047.120405T2251Z-120405T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
651 PM EDT THU APR 5 2012

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BEAUFORT COUNTY IN SOUTHEAST SOUTH CAROLINA...
  SOUTHWESTERN CHARLESTON COUNTY IN SOUTHEAST SOUTH CAROLINA...
  SOUTHEASTERN COLLETON COUNTY IN SOUTHEAST SOUTH CAROLINA...
  EAST CENTRAL JASPER COUNTY IN SOUTHEAST SOUTH CAROLINA...

* UNTIL 745 PM EDT

* AT 652 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...NEAR CLARENDON...MOVING NORTHEAST AT 30 MPH.

  PREPARE NOW FOR THE FOLLOWING HAZARDS...
  DAMAGING WINDS IN EXCESS OF 60 MPH...
  HAIL UP TO QUARTER SIZE...

* SOME LOCATIONS IN THE WARNING INCLUDE...
  CLARENDON...LAUREL BAY...BEAUFORT MARINE CORPS AIR STATION...
  GARDENS CORNER...DALE...LADYS ISLAND...WHITE HALL...GREEN POND...
  RITTER...

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 3260 7999 3259 8011 3254 8017 3255 8020
      3247 8035 3243 8035 3245 8037 3247 8035
      3249 8036 3246 8040 3249 8043 3248 8047
      3245 8047 3239 8042 3228 8068 3233 8099
      3250 8098 3263 8090 3292 8052 3263 7997
TIME...MOT...LOC 2252Z 244DEG 28KT 3253 8076

$$
1 follow-up statement
640 
WWUS52 KCHS 052318
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
718 PM EDT THU APR 5 2012

SCC053-052328-
/O.CAN.KCHS.SV.W.0047.000000T0000Z-120405T2345Z/
JASPER SC-
718 PM EDT THU APR 5 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL JASPER COUNTY HAS
BEEN CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
THURSDAY EVENING FOR SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA.

LAT...LON 3260 8001 3259 8011 3254 8017 3253 8023
      3247 8035 3243 8035 3249 8036 3246 8040
      3249 8043 3248 8047 3245 8047 3239 8042
      3228 8068 3249 8081 3267 8085 3292 8052
      3263 7997
TIME...MOT...LOC 2318Z 244DEG 28KT 3279 8065 3266 8049
          3249 8052 3240 8065

$$

SCC013-019-029-052345-
/O.CON.KCHS.SV.W.0047.000000T0000Z-120405T2345Z/
CHARLESTON SC-COLLETON SC-BEAUFORT SC-
718 PM EDT THU APR 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR NORTHEASTERN BEAUFORT...SOUTHEASTERN COLLETON AND SOUTHWESTERN
CHARLESTON COUNTIES...

AT 718 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM
RITTER TO WIGGINS TO COOSAW ISLAND TO UNITED STATES NAVAL HOSPITAL...
MOVING NORTHEAST AT 30 MPH.

PREPARE NOW FOR THE FOLLOWING HAZARDS...
DAMAGING WINDS IN EXCESS OF 60 MPH...
HAIL UP TO QUARTER SIZE...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...ADAMS
RUN...ASHEPOO...BEARS BLUFF...BEAUFORT...BEAUFORT MARINE CORPS AIR
STATION...BENNETTS POINT...BURTON...CLARENDON...DALE...EDISTO
BEACH...EDISTO ISLAND...GARDENS CORNER...GREEN POND...HOLLYWOOD...
JACKSONBORO...KIAWAH ISLAND...LADYS ISLAND...LAUREL BAY...MEGGETT...
PARRIS ISLAND...PORT ROYAL...RAVENEL...RITTER...ROCKVILLE...SEABROOK
ISLAND...SHELDON...WADMALAW ISLAND...WHITE HALL AND YONGES ISLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER SUCH AS HAIL...DOWNED TREES...LIMBS...AND
POWER LINES...PLEASE CONTACT THE CHARLESTON NATIONAL WEATHER SERVICE
TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR REPORTS TO
CHS.SKYWARN@NOAA.GOV.

&&

LAT...LON 3260 8001 3259 8011 3254 8017 3253 8023
      3247 8035 3243 8035 3249 8036 3246 8040
      3249 8043 3248 8047 3245 8047 3239 8042
      3228 8068 3249 8081 3267 8085 3292 8052
      3263 7997
TIME...MOT...LOC 2318Z 244DEG 28KT 3279 8065 3266 8049
          3249 8052 3240 8065

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 5, 6:10 PM EDTSpecial Weather StatementCHSJasper35 min
Apr 5, 6:40 PM EDTSpecial Weather StatementCHSBeaufort35 min
Apr 5, 7:14 PM EDTSpecial Weather StatementCHSColleton, Dorchester46 min
Apr 5, 7:35 PM EDTSevere Thunderstorm WarningCHSBeaufort, Berkeley, Charleston, Colleton, Dorchester55 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2012Every severe thunderstorm warning in 2012

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.