Alert archive / South Carolina / Tornado Warnings in 2007

Tornado Warning 23, NWS Charleston, SC

July 27, 2007Allendale County, Hampton County, South Carolina

NWS Charleston, SC issued this tornado warning at Jul 27, 2007, 9:55 PM EDT for Allendale County, Hampton County, South Carolina. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 27, 2007, 9:55 PM EDT (01:55 UTC)
Expired: Jul 27, 2007, 10:33 PM EDT
In force: 38 min
Issued by: NWS Charleston, SC
Area: Counties, with a storm outline in the text

Counties Allendale County, SC, Hampton County, SC

The radar

The Charleston,SC radar (KCLX), 36 km from the middle of the area, began a volume at 01:55 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 nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 1.9 hours before the alert went out and 101 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: 4350 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 647 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 51 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 280155
TORCHS
SCC005-049-280245-
/O.NEW.KCHS.TO.W.0023.070728T0155Z-070728T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
955 PM EDT FRI JUL 27 2007

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* TORNADO WARNING FOR...
  ALLENDALE COUNTY IN SOUTHEAST SOUTH CAROLINA...
  HAMPTON COUNTY IN SOUTHEAST SOUTH CAROLINA...

* UNTIL 1045 PM EDT

* AT 950 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 10 MILES
  NORTHWEST OF MILEY...OR ABOUT 12 MILES NORTHEAST OF ALLENDALE...
  MOVING SOUTH AT 20 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THE STORM INCLUDE...
  MILEY...
  CROCKETVILLE...
  HAMPTON...
  VARNVILLE...
  ALMEDA...

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.

TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU
SEE OR HEAR IT COMING...IT MAY BE TOO LATE. TAKE COVER NOW

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

LAT...LON 3308 8115 3308 8114 3303 8106 3301 8105
      3300 8105 3299 8104 3278 8094 3273 8116
TIME...MOT...LOC 0155Z 347DEG 19KT 3305 8111

$$

JAQ

2 follow-up statements

000 
WWUS52 KCHS 280215
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1015 PM EDT FRI JUL 27 2007

SCC005-049-280245-
/O.CON.KCHS.TO.W.0023.000000T0000Z-070728T0245Z/
ALLENDALE SC-HAMPTON SC-
1015 PM EDT FRI JUL 27 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT FOR
ALLENDALE AND HAMPTON COUNTIES...

AT 1013 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A POSSIBLE TORNADO.  THIS POSSIBLE TORNADO WAS LOCATED NEAR 
JENNYS...OR ABOUT 10 MILES NORTH OF HAMPTON...MOVING SOUTH AT 10 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...ALMEDA...
CROCKETVILLE...CUMMINGS...HAMPTON...MILEY AND VARNVILLE.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING PENNY 
SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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 3308 8115 3308 8114 3303 8106 3301 8105
      3300 8105 3299 8104 3278 8094 3273 8116
TIME...MOT...LOC 0215Z 347DEG 12KT 3302 8110

$$

JAQ

000 
WWUS52 KCHS 280233
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1030 PM EDT FRI JUL 27 2007

SCC005-049-280240-
/O.CAN.KCHS.TO.W.0023.000000T0000Z-070728T0245Z/
ALLENDALE SC-HAMPTON SC-
1030 PM EDT FRI JUL 27 2007

...THE TORNADO WARNING FOR ALLENDALE AND HAMPTON COUNTIES HAS BEEN
CANCELLED...

AT 1027 PM EDT...RADAR INDICATED THAT THE TORNADIC THUNDERSTORM WHICH
PROMPTED THE WARNING HAS WEAKENED...AND WAS NO LONGER CAPABLE OF 
PRODUCING TORNADOES. THE TORNADO WARNING HAS THEREFORE BEEN 
CANCELED.

WHILE THE TORNADO WARNING IS NO LONGER IN EFFECT...STRONG 
THUNDERSTORMS WILL STILL BE CAPABLE OF PRODUCING WINDS UP TO 45 MPH 
AND SMALL HAIL. IN ADDITION...CONTINUOUS CLOUD TO GROUND LIGHTNING 
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY. LIGHTNING IS 
ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR 
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

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 3308 8115 3308 8114 3303 8106 3301 8105
      3300 8105 3299 8104 3278 8094 3273 8116
TIME...MOT...LOC 0230Z 347DEG 12KT 3297 8109

$$

JAQ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 9:32 PM EDT	Severe Thunderstorm Warning	CHS	Colleton	43 min
Jul 28, 12:40 PM EDT	Severe Thunderstorm Warning	CHS	Charleston	50 min
Jul 28, 12:46 PM EDT	Severe Thunderstorm Warning	CHS	Colleton	44 min
Jul 28, 1:37 PM EDT	Areal Flood Advisory	CHS	Charleston	51 min
Jul 28, 2:20 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort	40 min
Jul 28, 2:21 PM EDT	Severe Thunderstorm Warning	CHS	Jasper	44 min
Jul 28, 3:07 PM EDT	Areal Flood Advisory	CHS	Beaufort	53 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.