Alert archive / South Carolina / Tornado Warnings in 2007

Tornado Warning 19, NWS Charleston, SC

July 11, 2007Charleston County, South Carolina

NWS Charleston, SC issued this tornado warning at Jul 11, 2007, 6:20 PM EDT for Charleston County, South Carolina. It was in force for 40 min. 6 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: Jul 11, 2007, 6:20 PM EDT (22:20 UTC)
Expired: Jul 11, 2007, 7:00 PM EDT
In force: 40 min
Issued by: NWS Charleston, SC
Area: Counties, with a storm outline in the text

County Charleston County, SC

The radar

The Charleston,SC radar (KCLX), 97 km from the middle of the area, began a volume at 22:22 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

Time	Report	Where	Remark
Jul 11, 6:22 PM EDT	TSTM WND DMG	Adams Run, SC	LARGE TREE LIMBS AND ONE TREE DOWN ON ROUTE 174.
Jul 11, 6:25 PM EDT	TSTM WND DMG	James Island, SC	6 INCH MAPLE TREE BLOWN DOWN NEAR THE HARBORVIEW SHOPPING CENTER.
Jul 11, 6:26 PM EDT	TSTM WND DMG	Hollywood, SC	SEVERAL LARGE TREE LIMBS DOWN IN HOLLYWOOD.
Jul 11, 6:30 PM EDT	TSTM WND DMG	Hollywood, SC	TREES AND POWER LINES DOWN AT MANNER ROAD AND FIELDS ROAD IN HOLLYWOOD.
Jul 11, 6:35 PM EDT	TSTM WND DMG	2 Se Rantowles, SC	LARGE TREE LIMBS DOWN ON CHISHOLM ROAD.
Jul 11, 6:45 PM EDT	TSTM WND DMG	Johns Island, SC	SEVERAL SMALL LIMBS DOWN WITH TRASH CANS BLOWN AROUND.

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.

Issued	Product	Office	Lasted
Jul 11, 4:01 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 10.3 hours before the alert went out and 20 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: 2156 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1033 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 70 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.

000 
WFUS52 KCHS 112220
TORCHS
SCC019-112300-
/O.NEW.KCHS.TO.W.0019.070711T2220Z-070711T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
620 PM EDT WED JUL 11 2007

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN CHARLESTON COUNTY IN SOUTHEAST SOUTH CAROLINA...

* UNTIL 700 PM EDT

* AT 617 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ADAMS
  RUN...OR ABOUT 23 MILES WEST OF CHARLESTON...MOVING EAST AT 40 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THE STORM INCLUDE...
  RAVENEL...ADAMS RUN...
  YONGES ISLAND...MEGGETT...
  WADMALAW ISLAND...
  JOHNS ISLAND...
  WEST ASHLEY...

A TORNADO MAY FORM AT ANY TIME. TAKE COVER NOW. ABANDON MOBILE HOMES
AND VEHICLES. MOVE TO AN INTERIOR ROOM OR HALLWAY ON THE LOWEST
FLOOR. STAY AWAY FROM WINDOWS.

TO REPORT SEVERE WEATHER ONLY...PLEASE CONTACT THE NATIONAL WEATHER 
SERVICE IN CHARLESTON TOLL FREE AT 1-888-383-2024.

LAT...LON 3260 8039 3278 8041 3283 7993 3282 7991
      3284 7987 3278 7986 3277 7989 3277 7985
      3275 7987 3271 7986 3265 7991 3263 7996
      3263 7999 3261 7999

$$

JAQ

2 follow-up statements

000 
WWUS52 KCHS 112236
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
635 PM EDT WED JUL 11 2007

SCC019-112300-
/O.CON.KCHS.TO.W.0019.000000T0000Z-070711T2300Z/
CHARLESTON SC-
635 PM EDT WED JUL 11 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR 
SOUTHWESTERN CHARLESTON COUNTY...

AT 631 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS 
STORM WAS LOCATED NEAR WADMALAW ISLAND...OR ABOUT 14 MILES WEST OF 
CHARLESTON...MOVING EAST AT 40 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
CHARLESTON...FOLLY BEACH...HOLLYWOOD...JAMES ISLAND...JOHNS ISLAND...
MEGGETT...RAVENEL...WADMALAW ISLAND... AND WEST ASHLEY.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

TO REPORT SEVERE WEATHER ONLY...PLEASE CONTACT THE NATIONAL WEATHER 
SERVICE IN CHARLESTON TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR 
REPORTS TO CHS.SKYWARN@NOAA.GOV.

LAT...LON 3278 8031 3283 7993 3282 7991 3284 7987
      3278 7986 3277 7989 3277 7985 3275 7988
      3271 7986 3265 7991 3263 7999 3261 7999
      3260 8029 3261 8030

$$

JAQ

000 
WWUS52 KCHS 112255
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
654 PM EDT WED JUL 11 2007

SCC019-112304-
/O.EXP.KCHS.TO.W.0019.000000T0000Z-070711T2300Z/
CHARLESTON SC-
654 PM EDT WED JUL 11 2007

...THE TORNADO WARNING FOR SOUTHWESTERN CHARLESTON COUNTY WILL 
EXPIRE AT 700 PM EDT...

AT 651 PM EDT...RADAR INDICATED THAT POTENTIAL TORNADIC THUNDERSTORM 
THAT PROMPTED THE WARNING WEAKEND...AND WAS NO LONGER CAPABLE OF 
PRODUCING TORNADOES OR OTHER SEVERE WEATHER. THE TORNADO WARNING HAS 
THEREFORE BEEN ALLOWED TO EXPIRE.

TO REPORT SEVERE WEATHER OR STORM RELATED DAMAGE ONLY...PLEASE 
CONTACT THE NATIONAL WEATHER SERVICE IN CHARLESTON TOLL FREE AT 
1-888-383-2024 OR EMAIL YOUR REPORTS TO CHS.SKYWARN@NOAA.GOV.

LAT...LON 3278 8031 3283 7993 3282 7991 3284 7987
      3278 7986 3277 7989 3277 7985 3275 7988
      3271 7986 3265 7991 3263 7999 3261 7999
      3260 8029 3261 8030

$$

JAQ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 4:09 PM EDT	Severe Thunderstorm Warning	CHS	Allendale	51 min
Jul 11, 5:05 PM EDT	Severe Thunderstorm Warning	CHS	Hampton, Jasper	55 min
Jul 11, 5:14 PM EDT	Severe Thunderstorm Warning	CHS	Dorchester	46 min
Jul 11, 5:21 PM EDT	Severe Thunderstorm Warning	CHS	Colleton	39 min
Jul 11, 5:25 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	65 min
Jul 11, 5:29 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Jasper	46 min
Jul 11, 6:01 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Colleton, Dorchester	41 min
Jul 11, 6:11 PM EDT	Tornado Warning	CHS	Berkeley, Charleston	49 min

Nearby

Tornado Warnings in South Carolina, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.