Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 3, NWS Charleston, SC

January 21, 2012Liberty County, Long County, Tattnall County, Georgia

NWS Charleston, SC issued this severe thunderstorm warning at Jan 21, 2012, 7:15 PM EST for Liberty County, Long County, Tattnall County, Georgia. It was in force for 45 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
Jan 21, 2012, 7:15 PM EST (00:15 UTC)
Expired
Jan 21, 2012, 8:00 PM EST
In force
45 min
Issued by
NWS Charleston, SC
Area
Storm-based polygon

Counties Liberty County, GA, Long County, GA, Tattnall County, GA

The radar

The Charleston,SC radar (KCLX), 127 km from the middle of the area, began a volume at 00:18 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
Jan 21, 12:28 PM ESTTornado WatchSPC8 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 0.3 hours before the alert went out and 144 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, Jacksonville, FL at 00:00Z on 2012-01-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Jacksonville, FL at 00:00Z on 2012-01-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1044 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
107 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.

700 
WUUS52 KCHS 220015
SVRCHS
GAC179-183-267-220100-
/O.NEW.KCHS.SV.W.0003.120122T0015Z-120122T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
715 PM EST SAT JAN 21 2012

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL LIBERTY COUNTY IN SOUTHEAST GEORGIA...
  LONG COUNTY IN SOUTHEAST GEORGIA...
  SOUTHEASTERN TATTNALL COUNTY IN SOUTHEAST GEORGIA...

* UNTIL 800 PM EST

* AT 715 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM...8 MILES SOUTHWEST OF GLENNVILLE...MOVING EAST
  AT 35 MPH.

  PREPARE NOW FOR THE FOLLOWING HAZARDS...
  DAMAGING WINDS IN EXCESS OF 60 MPH...
  HAIL UP TO QUARTER SIZE...

* SOME LOCATIONS IN THE WARNING INCLUDE...
  MENDES...GLENNVILLE...DONALD...LUDOWICI...GUM BRANCH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS ALSO IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES SUDDENLY...SOMETIMES WITH LITTLE OR NO WARNING. IF YOU SEE
OR HEAR A TORNADO...MOVE QUICKLY TO AN INTERIOR ROOM IN A STURDY
STRUCTURE.

&&

LAT...LON 3207 8208 3191 8146 3161 8176 3162 8179
      3165 8180 3165 8183 3167 8186 3171 8188
      3173 8191 3175 8192 3178 8196 3178 8198
      3181 8202 3182 8205 3186 8212
TIME...MOT...LOC 0015Z 274DEG 31KT 3188 8203

$$
2 follow-up statements
309 
WWUS52 KCHS 220032
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
732 PM EST SAT JAN 21 2012

GAC179-183-267-220100-
/O.CON.KCHS.SV.W.0003.000000T0000Z-120122T0100Z/
TATTNALL GA-LIBERTY GA-LONG GA-
732 PM EST SAT JAN 21 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EST
FOR LONG...WEST CENTRAL LIBERTY AND SOUTHEASTERN TATTNALL COUNTIES...

AT 730 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM NEAR GLENNVILLE...MOVING EAST AT 35 
MPH. THIS STORM WILL LIKELY APPROACH THE HINESVILLE AREA PRIOR TO
800 PM.

PREPARE NOW FOR THE FOLLOWING HAZARDS...
DAMAGING WINDS IN EXCESS OF 60 MPH...
HAIL UP TO QUARTER SIZE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EST SATURDAY EVENING
FOR SOUTHEAST GEORGIA.

&&

LAT...LON 3186 8201 3189 8197 3194 8195 3204 8196
      3191 8146 3161 8176 3162 8179 3165 8180
      3165 8183 3167 8186 3171 8188 3173 8191
      3175 8192 3178 8196 3178 8198 3181 8202
TIME...MOT...LOC 0030Z 274DEG 31KT 3187 8188

$$
583 
WWUS52 KCHS 220051
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
751 PM EST SAT JAN 21 2012

GAC179-183-267-220101-
/O.EXP.KCHS.SV.W.0003.000000T0000Z-120122T0100Z/
TATTNALL GA-LIBERTY GA-LONG GA-
751 PM EST SAT JAN 21 2012

...THE SEVERE THUNDERSTORM WARNING FOR LONG...WEST CENTRAL LIBERTY
AND SOUTHEASTERN TATTNALL COUNTIES WILL EXPIRE AT 800 PM EST...

AT 751 PM EST...RADAR INDICATED THAT THE THUNDERSTORM WHICH PROMPTED
THE WARNING HAD WEAKENED...THUS THE SEVERE THUNDERSTORM WARNING HAS
BEEN ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EST SATURDAY EVENING
FOR SOUTHEAST GEORGIA.

LAT...LON 3186 8201 3189 8197 3194 8195 3204 8196
      3191 8146 3161 8176 3162 8179 3165 8180
      3165 8183 3167 8186 3171 8188 3173 8191
      3175 8192 3178 8196 3178 8198 3181 8202
TIME...MOT...LOC 0051Z 274DEG 31KT 3186 8167

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 21, 7:01 PM ESTSpecial Weather StatementCHSTattnall29 min
Jan 21, 8:08 PM ESTSpecial Weather StatementCHSMcIntosh52 min
Jan 22, 1:20 AM ESTDense Fog AdvisoryCHSBulloch, Candler, Effingham, Evans, Jenkins, Long and 2 more8 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2012Every severe thunderstorm warning in 2012

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.