Alert archive / South Carolina / Tornado Warnings in 2007

Tornado Warning 21, NWS Charleston, SC

July 26, 2007Beaufort County, South Carolina

NWS Charleston, SC issued this tornado warning at Jul 26, 2007, 5:59 PM EDT for Beaufort County, South Carolina. It was in force for 31 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 26, 2007, 5:59 PM EDT (21:59 UTC)
Expired: Jul 26, 2007, 6:30 PM EDT
In force: 31 min
Issued by: NWS Charleston, SC
Area: Counties, with a storm outline in the text

County Beaufort County, SC

The radar

The Charleston,SC radar (KCLX), 56 km from the middle of the area, began a volume at 21:59 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 12:00Z, 10.0 hours before the alert went out and 105 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: 2486 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 479 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS52 KCHS 262159
TORCHS
SCC013-262230-
/O.NEW.KCHS.TO.W.0021.070726T2159Z-070726T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
559 PM EDT THU JUL 26 2007

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* TORNADO WARNING FOR...
  BEAUFORT COUNTY IN SOUTHEAST SOUTH CAROLINA...

* UNTIL 630 PM EDT

* AT 559 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR HILTON HEAD
  ISLAND...MOVING SOUTHEAST AT 20 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THE STORM INCLUDE...
  HILTON HEAD ISLAND...

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 3213 8078 3226 8082 3229 8077 3222 8067
TIME...MOT...LOC 2159Z 320DEG 22KT 3222 8076

$$

2 follow-up statements

000 
WWUS52 KCHS 262213
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
611 PM EDT THU JUL 26 2007

SCC013-262230-
/O.CON.KCHS.TO.W.0021.000000T0000Z-070726T2230Z/
BEAUFORT SC-
611 PM EDT THU JUL 26 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM EDT FOR BEAUFORT
COUNTY...

AT 611 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A TORNADO. THIS TORNADO WAS LOCATED OVER HILTON HEAD 
ISLAND...BETWEEN FOREST BEACH AND FOLLY FIELD MOVING SOUTHEAST AT 20 
MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...HILTON 
HEAD ISLAND.

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. 

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 3213 8078 3226 8082 3229 8077 3222 8067
TIME...MOT...LOC 2211Z 320DEG 23KT 3216 8070

$$

000 
WWUS52 KCHS 262228
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
627 PM EDT THU JUL 26 2007

SCC013-262237-
/O.EXP.KCHS.TO.W.0021.000000T0000Z-070726T2230Z/
BEAUFORT SC-
627 PM EDT THU JUL 26 2007

...THE TORNADO WARNING FOR BEAUFORT COUNTY WILL EXPIRE AT 630 PM
EDT...

AT 627 PM EDT...RADAR INDICATED THAT THE TORNADIC THUNDERSTORM WHICH 
PROMPTED THE WARNING HAD WEAKENED...THUS THE TORNADO WARNING BEEN 
ALLOWED TO EXPIRE.

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 3213 8078 3226 8082 3229 8077 3222 8067
TIME...MOT...LOC 2227Z 320DEG 23KT 3208 8062

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 4:27 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Jasper	48 min
Jul 26, 5:25 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Dorchester	23 min
Jul 26, 5:30 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort	60 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.