Alert archive / Georgia / Tornado Warnings in 2011

Tornado Warning 9, NWS Charleston, SC

August 8, 2011Chatham County, Georgia

NWS Charleston, SC issued this tornado warning at Aug 8, 2011, 7:11 PM EDT for Chatham County, Georgia. It was in force for 24 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
Aug 8, 2011, 7:11 PM EDT (23:11 UTC)
Expired
Aug 8, 2011, 7:35 PM EDT
In force
24 min
Issued by
NWS Charleston, SC
Area
Storm-based polygon

County Chatham County, GA

The radar

The Charleston,SC radar (KCLX), 79 km from the middle of the area, began a volume at 23:13 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, 11.2 hours before the alert went out and 136 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 2011-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1745 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2011-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 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
1745 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
1201 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
1 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.

962 
WFUS52 KCHS 082311
TORCHS
GAC051-090000-
/O.NEW.KCHS.TO.W.0009.110808T2311Z-110809T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
711 PM EDT MON AUG 8 2011

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL CHATHAM COUNTY IN SOUTHEAST GEORGIA...

* UNTIL 800 PM EDT

* AT 705 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER EAST
  CENTRAL CHATHAM COUNTY...MOVING SOUTHEAST AT 10 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  TYBEE ISLAND AND WASSAW SOUND

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT HAIL...DOWNED TREES...LIMBS...AND POWER LINES DIRECTLY TO THE
CHARLESTON NATIONAL WEATHER SERVICE AT 1-888-383-2024.

&&

LAT...LON 3196 8100 3201 8094 3198 8085 3197 8085
      3195 8088 3194 8091 3191 8093 3189 8095
TIME...MOT...LOC 2310Z 308DEG 11KT 3196 8094

$$

JAQ
1 follow-up statement
394 
WWUS52 KCHS 082335
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
735 PM EDT MON AUG 8 2011

GAC051-082344-
/O.CAN.KCHS.TO.W.0009.000000T0000Z-110809T0000Z/
CHATHAM GA-
735 PM EDT MON AUG 8 2011

...THE TORNADO WARNING FOR EAST CENTRAL CHATHAM COUNTY HAS BEEN
CANCELLED...

AT 729 PM EDT...RADAR INDICATED THAT THE TORNADIC THUNDERSTORM WHICH
PROMPTED THE WARNING HAD WEAKENED...AND WAS NO LONGER CAPABLE OF 
PRODUCING TORNADOES. THEREFORE...THE TORNADO WARNING HAS BEEN 
CANCELED. HOWEVER...A SEVERE THUNDERSTORM REMAINS IN EFFECT THROUGH 
830 PM. 

ALTHOUGH THE TORNADO WARNING IS NO LONGER IN EFFECT...SEVERE 
THUNDERSTORMS ARE STILL CAPABLE OF PRODUCING DAMAGING 
WINDS...FREQUENT LIGHTNING AND HEAVY RAINFALL. THE SAFEST COURSE OF 
ACTION IS TO REMAIN INDOORS UNTIL THE STORMS HAVE PASSED.

TO REPORT HAIL OR WIND DAMAGE...CONTACT THE CHARLESTON NATIONAL
WEATHER SERVICE AT 1-888-383-2024 OR EMAIL YOUR REPORTS TO
CHS.SKYWARN@NOAA.GOV. REPORTS CAN ALSO BE SENT THROUGH TWITTER USING
#WXREPORT.

LAT...LON 3196 8100 3201 8094 3198 8085 3197 8085
      3195 8088 3194 8091 3191 8093 3189 8095
TIME...MOT...LOC 2334Z 308DEG 11KT 3191 8087

$$

JAQ

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 3:25 PM EDTHeat AdvisoryCHSBulloch, Candler, Effingham, Evans, Jenkins, Long and 2 more28 hr
Aug 8, 4:55 PM EDTSpecial Weather StatementCHSCandler35 min
Aug 8, 5:32 PM EDTSevere Thunderstorm WarningCHSEffingham58 min
Aug 8, 5:46 PM EDTSevere Thunderstorm WarningCHSBulloch, Candler47 min
Aug 8, 6:00 PM EDTSevere Thunderstorm WarningCHSChatham, Effingham60 min
Aug 8, 6:00 PM EDTSevere Thunderstorm WarningCHSBryan, Bulloch, Evans, Liberty60 min
Aug 8, 6:26 PM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Effingham, Liberty64 min
Aug 8, 6:41 PM EDTSevere Thunderstorm WarningCHSLiberty, Long64 min
Aug 8, 6:55 PM EDTSpecial Weather StatementCHSScreven35 min
Aug 8, 7:02 PM EDTAreal Flood AdvisoryCHSBryan, Chatham118 min
Aug 8, 7:08 PM EDTTornado WarningCHSBryan, Chatham, Liberty42 min
Aug 8, 7:16 PM EDTSpecial Marine WarningCHS119 min
Aug 8, 7:26 PM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Liberty64 min

Nearby

Tornado Warnings in Georgia, 2011Every tornado warning in 2011Tornadoes in 2011

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.