Alert archive / Georgia / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 2, NWS Atlanta, GA

January 21, 2010Oconee County, Walton County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 21, 2010, 10:16 PM EST for Oconee County, Walton County, Georgia. It was in force for 44 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, 2010, 10:16 PM EST (03:16 UTC)
Expired
Jan 21, 2010, 11:00 PM EST
In force
44 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Oconee County, GA, Walton County, GA

The radar

The Atlanta radar (KFFC), 111 km from the middle of the area, began a volume at 03:20 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 3.3 hours before the alert went out and 105 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, Peachtre/Fal Fld, GA at 00:00Z on 2010-01-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 56 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, Peachtre/Fal Fld, GA at 00:00Z on 2010-01-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 316 square meters per square second.1939587897117Sfc1 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
56 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
461 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
316 m²/s²
0-3 km storm-relative helicity
453 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

016 
WUUS52 KFFC 220316
SVRFFC
GAC219-297-220400-
/O.NEW.KFFC.SV.W.0002.100122T0316Z-100122T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1016 PM EST THU JAN 21 2010

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WALTON COUNTY IN NORTH CENTRAL GEORGIA
  OCONEE COUNTY IN NORTHEAST GEORGIA

* UNTIL 1100 PM EST

* AT 1011 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED NEAR
  BETWEEN...MOVING EAST AT 55 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GOOD
  HOPE...NORTH HIGH SHOALS...BISHOP AND WATKINSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

&&

LAT...LON 3389 8337 3385 8328 3381 8330 3376 8328
      3373 8333 3372 8345 3380 8347 3381 8352
      3371 8358 3369 8382 3372 8385 3386 8388
      3393 8350 3393 8343
TIME...MOT...LOC 0316Z 263DEG 49KT 3380 8372

$$
2 follow-up statements
332 
WWUS52 KFFC 220337
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1037 PM EST THU JAN 21 2010

GAC219-297-220400-
/O.CON.KFFC.SV.W.0002.000000T0000Z-100122T0400Z/
WALTON GA-OCONEE GA-
1037 PM EST THU JAN 21 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EST
FOR OCONEE AND WALTON COUNTIES...

AT 1034 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
BISHOP...MOVING EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROSE
HILL AND BARNETT SHOALS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

&&

LAT...LON 3389 8337 3385 8328 3381 8330 3376 8328
      3373 8333 3372 8345 3380 8347 3381 8352
      3371 8358 3369 8382 3372 8385 3386 8388
      3393 8350 3393 8343
TIME...MOT...LOC 0337Z 263DEG 49KT 3383 8338

$$
646 
WWUS52 KFFC 220358
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1058 PM EST THU JAN 21 2010

GAC219-297-220406-
/O.EXP.KFFC.SV.W.0002.000000T0000Z-100122T0400Z/
WALTON GA-OCONEE GA-
1058 PM EST THU JAN 21 2010

...THE SEVERE THUNDERSTORM WARNING FOR OCONEE AND WALTON COUNTIES
EXPIRES AT 1100 PM EST...

THE STORM THAT PROMPTED THE WARNING HAS WEAKENED AND IS NO LONGER 
EXPECTED TO PRODUCE SEVERE WEATHER. 

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3389 8337 3385 8328 3381 8330 3376 8328
      3373 8333 3372 8345 3380 8347 3381 8352
      3371 8358 3369 8382 3372 8385 3386 8388
      3393 8350 3393 8343
TIME...MOT...LOC 0356Z 263DEG 49KT 3386 8307

$$

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 21, 8:01 PM ESTTornado WarningFFCCarroll44 min
Jan 22, 1:17 AM ESTRiver Flood WarningFFCPulaski30 hr
Jan 22, 11:29 AM ESTRiver Flood WarningFFCMontgomery, Treutlen, Wheeler72 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2010Every severe thunderstorm warning in 2010

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.