Alert archive / Georgia / Tornado Warnings in 1999

Tornado Warning 20, NWS Charleston, SC

August 23, 1999Bryan County, Chatham County, Georgia

NWS Charleston, SC issued this tornado warning at Aug 23, 1999, 7:13 PM EDT for Bryan County, Chatham County, Georgia. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 23, 1999, 7:13 PM EDT (23:13 UTC)
Expired
Aug 23, 1999, 7:45 PM EDT
In force
32 min
Issued by
NWS Charleston, SC
Area
Whole counties

Counties Bryan County, GA, Chatham County, GA

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 11.2 hours before the alert went out and 156 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 12:00Z on 1999-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2385 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 12:00Z on 1999-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939Sfc1 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
2385 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
661 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
31 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 
TTAA00 KCHS 232314 COR
TORCHS
GAC029-051-232345-

BULLETIN...EAS ACTIVATION REQUESTED
TORNADO WARNING...CORRECTED
NATIONAL WEATHER SERVICE CHARLESTON SC
713 PM EDT MON AUG 23 1999

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN BRYAN COUNTY IN SOUTHEASTERN GEORGIA.
  SOUTHERN CHATHAM COUNTY IN SOUTHEASTERN GEORGIA.

* UNTIL 745 PM EDT.

* AT 710 PM EDT... AREA LAW ENFORCEMENT INDICATED A TORNADO FORT
  MCALLISTER... MOVING @SOUTHWEST 20 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  FORT MCALLISTER.

IF YOU ARE IN A MULTIPLE STORY BUILDING...GO TO A SMALL INTERIOR
ROOM AWAY FROM WINDOWS.
&

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Charleston, SC wrote its last area forecast discussion before this tornado warning went out at Aug 23, 3:16 PM EDT, 3 hours 57 minutes earlier.

Area forecast discussion, Aug 23, 3:16 PM EDT, 3 hours 57 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
316 PM EDT MON AUG 23 1999

MODELS AGAIN PRODUCING A WISHY-WASHY SOLN WITH VERY WEAK DISTURBANCES
SLIDING THRU THE BROAD UPR TROF INTO WED. NO CONCENTRATED AREAS OF
LIFT TO FOCUS ON. GUID POPS HV COME BACK DOWN INTO THE SLGT CHC/CHC
CATEGORIES. WHAT WE DO HAVE TO FOCUS ON IS A VERY MOIST ELY FLOW AT
THE SFC. THIS SHUD AID IN SEABREEZE DEVELOPMENT DURING THE DAY...AND
SHUD ALSO CAUSE SUM CONVERGENCE OVN AS IT COLLIDES WITH THE LAND
BREEZE COMPONENT. MODELS DO SHOW SUM WEAK ENERGY COMING INTO THE
AREA LATER TNGT AND TUE...BUT VERY WEAK. WE SEEM TO BE IN BETWEEN
SYS TUE NGT/WED AS INITIAL S/WV MOVES BY AND MAIN TROF HANGS BACK TO
THE W. ANOTHER FTR TO WATCH WL BE THE AREA OF DISTURBED WX JUST N
OF PUERTO RICO AND HISPANIOLA. THIS CUD EASILY DEVELOP INTO SOMETHING
MORE...AND WHATEVER DOES DEVELOP WL LIKELY PASS E OF THIS AREA BY
THU. UPR TROF OVER TN VLY INTO THE EASTERN SEABOARD SHUD BE ABLE TO
HOLD THIS SYS OFF AND KEEP IT OUT OVER THE WATER. BLV THIS FTR WL NOT
COME INTO PLAY WITH FCST THIS WEEK...EXCEPT FOR SOME SWELLS OVER THE
MARINE AREA. HOWEVER...IT WL NEED TO BE WATCHED.

CWF...OVER THE WATERS WILL KEEP WINDS OUT OF THE EAST OVERNIGHT
ALTHOUGH MODELS ARE SUGGESTING AT LEAST A BRIEF SHIFT TO THE
SOUTHEAST. VEERING SHOULD RESUME ON TUESDAY AND WILL THEN KEEP
DIRECTION SOUTHEAST THROUGH THE SHORT RANGE. GRADIENT LOOKS LIGHT BUT
WILL INCREASE WAVES TO JUST BELOW SMALL CRAFT CRITERIA ON WEDNESDAY
AS SWELL INCREASES FROM APPROACHING TROPICAL LOW.

PRELIM CCF
CHS BB 073/088 073/088 074 202323
CHL BB 078/086 078/086 079 202323
NBC BB 073/088 073/088 074 202323
SAV BB 073/088 073/088 074 202323

.CHS...
SC...NONE.
GA...NONE.

TJR/

Nearby

Tornado Warnings in Georgia, 1999Every tornado warning in 1999Tornadoes in 1999

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.