Alert archive / South Carolina / Tornado Warnings in 2007

Tornado Warning 11, NWS Charleston, SC

April 15, 2007Allendale County, South Carolina

NWS Charleston, SC issued this tornado warning at Apr 15, 2007, 7:02 AM EDT for Allendale County, South Carolina. It was in force for 13 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
Apr 15, 2007, 7:02 AM EDT (11:02 UTC)
Expired
Apr 15, 2007, 7:15 AM EDT
In force
13 min
Issued by
NWS Charleston, SC
Area
Counties, with a storm outline in the text

County Allendale County, SC

The radar

The Charleston,SC radar (KCLX), 60 km from the middle of the area, began a volume at 11:05 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 watch it was issued in

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

IssuedProductOfficeLasted
Apr 15, 2:01 AM EDTTornado WatchSPC7 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 11.0 hours before the alert went out and 137 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 2007-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 329 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 2007-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 186 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
329 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
638 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
186 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

000 
WFUS52 KCHS 151102
TORCHS
SCC005-151115-
/O.NEW.KCHS.TO.W.0011.070415T1102Z-070415T1115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
702 AM EDT SUN APR 15 2007

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

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

* UNTIL 715 AM EDT

* AT 701 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR MARTIN...OR
  ABOUT 8 MILES NORTHWEST OF ALLENDALE...MOVING NORTHEAST AT 40 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THE STORM INCLUDE...
  MARTIN...MILLETT...
  APPLETON...

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 3307 8155 3300 8148 3311 8118 3314 8149

$$
1 follow-up statement
000 
WWUS52 KCHS 151112
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
711 AM EDT SUN APR 15 2007

SCC005-151121-
/O.EXP.KCHS.TO.W.0011.000000T0000Z-070415T1115Z/
ALLENDALE SC-
711 AM EDT SUN APR 15 2007

...THE TORNADO WARNING FOR ALLENDALE COUNTY WILL EXPIRE AT 715 AM
EDT...

AT 711 AM EDT...RADAR INDICATED THAT THE TORNADIC THUNDERSTORM WHICH
PROMPTED THE WARNING HAD MOVED OUT OF THE WARNED AREA...THUS THE
TORNADO WARNING BEEN ALLOWED TO EXPIRE.

STAY TUNED TO NOAA WEATHER RADIO ALL HAZARDS...TV OR YOUR LOCAL NEWS 
SOURCE FOR THE LATEST WEATHER INFORMATION. 

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 3307 8155 3300 8148 3311 8118 3314 8149

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 1:45 AM EDTTornado WarningCHSBerkeley30 min
Apr 15, 3:37 AM EDTSevere Thunderstorm WarningCHSAllendale38 min
Apr 15, 3:44 AM EDTTornado WarningCHSAllendale31 min
Apr 15, 4:23 AM EDTTornado WarningCHSAllendale27 min
Apr 15, 7:39 AM EDTTornado WarningCHSAllendale36 min
Apr 15, 9:38 AM EDTTornado WarningCHSColleton39 min
Apr 15, 10:03 AM EDTTornado WarningCHSDorchester27 min
Apr 15, 10:21 AM EDTSevere Thunderstorm WarningCHSBerkeley39 min
Apr 15, 10:35 AM EDTSevere Thunderstorm WarningCHSColleton, Dorchester40 min
Apr 15, 10:59 AM EDTSevere Thunderstorm WarningCHSBerkeley, Charleston91 min
Apr 15, 11:14 AM EDTSevere Thunderstorm WarningCHSColleton, Dorchester37 min
Apr 15, 4:02 PM EDTFire Weather WatchCHSAllendale, Berkeley, Colleton, Dorchester, Hampton13 hr

Nearby

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