Alert archive / South Carolina / Tornado Warnings in 2007

Tornado Warning 9, NWS Charleston, SC

April 15, 2007Allendale County, South Carolina

NWS Charleston, SC issued this tornado warning at Apr 15, 2007, 3:44 AM EDT for Allendale 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
Apr 15, 2007, 3:44 AM EDT (07:44 UTC)
Expired
Apr 15, 2007, 4:15 AM EDT
In force
31 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), 65 km from the middle of the area, began a volume at 07:48 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, 7.7 hours before the alert went out and 142 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 150744
TORCHS
SCC005-150815-
/O.NEW.KCHS.TO.W.0009.070415T0744Z-070415T0815Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
344 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 415 AM EDT

* AT 342 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR MILLETT...
  OR ABOUT 16 MILES WEST OF ALLENDALE...MOVING NORTHEAST AT 40 MPH.

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

THIS IS AN EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING
SITUATION. IF YOU ARE IN THE PATH OF THIS TORNADO...TAKE COVER
IMMEDIATELY

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

LAT...LON 3309 8162 3301 8149 3311 8125 3315 8153

$$
2 follow-up statements
000 
WWUS52 KCHS 150803
SVSCHS

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

SCC005-150815-
/O.CON.KCHS.TO.W.0009.000000T0000Z-070415T0815Z/
ALLENDALE SC-
402 AM EDT SUN APR 15 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 AM EDT FOR ALLENDALE
COUNTY...

AT 358 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A TORNADO. THIS TORNADO WAS LOCATED JUST NORTH OF MARTIN... 
MOVING NORTHEAST AT 45 MPH.

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 8156 3301 8149 3310 8130 3314 8150

$$
000 
WWUS52 KCHS 150814 RRA
SVSCHS

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

SCC005-150825-
/O.EXP.KCHS.TO.W.0009.000000T0000Z-070415T0815Z/
ALLENDALE SC-
415 AM EDT SUN APR 15 2007

...THE TORNADO WARNING FOR ALLENDALE COUNTY WILL EXPIRE AT 415 AM
EDT...

AT 414 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.

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 8156 3301 8149 3310 8130 3314 8150

$$

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, 4:23 AM EDTTornado WarningCHSAllendale27 min
Apr 15, 7:02 AM EDTTornado WarningCHSAllendale13 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.