Alert archive / Georgia / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 431, NWS Atlanta, GA

September 28, 2006Spalding County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Sep 28, 2006, 7:01 PM EDT for Spalding County, Georgia. It was in force for 29 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 28, 2006, 7:01 PM EDT (23:01 UTC)
Expired: Sep 28, 2006, 7:30 PM EDT
In force: 29 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Spalding County, GA

The radar

The Atlanta radar (KFFC), 24 km from the middle of the area, began a volume at 23:01 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.

What was reported inside it

Time	Report	Where	Remark
Sep 28, 7:05 PM EDT	HAIL 1	Rio, GA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 4 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.0 hours before the alert went out and 19 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 5 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 1826 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 43 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 
WUUS52 KFFC 282301
SVRFFC
GAC255-282330-
/O.NEW.KFFC.SV.W.0431.060928T2301Z-060928T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
701 PM EDT THU SEP 28 2006

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SPALDING COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 730 PM EDT

* AT 657 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED JUST SOUTH OF
  BROOKS...MOVING EAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  GRIFFIN...EXPERIMENT AND TOWALAGA.

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 3326 8447 3320 8446 3323 8413 3333 8415
      3334 8434

$$

What forecasters said that day

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

NWS Atlanta, GA wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 28, 6:17 PM EDT, 44 minutes earlier.

Area forecast discussion, Sep 28, 6:17 PM EDT, 44 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
617 PM EDT THU SEP 28 2006

.SHORT TERM...(TONIGHT THROUGH SATURDAY)
COLD FRONT WILL MOVE ACROSS AREA THIS AFTERNOON AND EVENING.
LIMITED MOISTURE ASSOCIATED WITH FRONT BUT GOOD DYNAMICS ACROSS N
COUNTIES AS JET MAX MOVES ACROSS. A FEW STORMS COULD BECOME
STRONG-SEVERE UNTIL THE SUN GOES DOWN. CHANCES FOR SHOWERS AND
STORMS DECREASE THE FARTHER S YOU GO OVER THE CWA. SHOWER/STORM
CHANCES WILL END TONIGHT.

SURFACE HIGH PRESSURE MOVES OVER AREA FRIDAY AND CONTINUES FOR MUCH
OF SATURDAY. A SHORT WAVE MOVES ACROSS THE AREA LATE FRIDAY WITH
ANOTHER MOVING TO THE AREA SATURDAY NIGHT...BOTH WITH MINIMAL
MOISTURE ASSOCIATED. A FEW LIGHT SHOWERS COULD OCCUR ACROSS FAR N GA
SATURDAY NIGHT.

COOLER TEMPERATURES IN STORE BEHIND FRONT THIS PERIOD. FRIDAY NIGHT
LOWS GETTING INTO THE UPPER HALF OF THE 30S FOR SOME AREAS OF N GA.

.LONG TERM...(SUNDAY THROUGH THURSDAY)
SHORT WAVE MOVING BY TO START SUNDAY THEN HIGH PRESSURE BEGINS TO
BUILD AND THIS CONTINUES THROUGH TUESDAY WITH HIGH PRESSURE HOLDING
INTO WEDNESDAY. ON THURSDAY...MOISTURE TRIES TO INCREASE AS A SHORT
WAVE SKIRTS N GA. THERE IS NOT ENOUGH MOISTURE OR DYNAMICS TO
INCLUDE SIGNIFICANT POPS AT THIS TIME.

&&

.FIRE WEATHER...
DRY RHS MOVING OVER PARTS OF CENTRAL GA FRIDAY AFTERNOON AND MUCH
OF THE AREA SATURDAY AFTERNOON. LOW RHS GETING CLOSE TO 25 PERCENT
ON SATURDAY AND THIS WILL NEED TO BE WATCHED. FOR NOW ANY DURATIONS
BELOW 25 PERCENT WILL BE SHORT-LIVED.

&&

.AVIATION...
COLD FRONT STILL NORTH OF ATL...EXPECT FROPA BETWEEN 00Z AND
02Z...AND SHORTLY AFTER THAT IN THE AHN AREA. CONVECTION CONTINUING
AHEAD OF THE FRONT...HOWEVER LAPS IS INDICATING THE ATMOSPHERE IS
STABILIZING AND WITHOUT SUNSHINE...EXPECT CONVECTION TO DISSIPATE
RAPIDLY AROUND SUNSET.  THERE SHOULD REMAIN SOME CU...BUT ETA
INDICATING RAPID DRYING BEHIND THE FRONT AND SHOULD SEE CLEAR SKIES
AROUND 6Z NORTH AND 8Z CENTRAL. WITH DEWPOINTS DROPPING INTO THE 40S
AND DOWNSLOPE FLOW DO NOT EXPECT LOW CLOUDS OR FOG DEVELOPING LATER
TONIGHT. VFR WILL CONTINUE AFTER DAYBREAK FRIDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          51  74  44  76 /  40   5   5   5
ATLANTA         50  71  49  74 /  20   5   5   5
BLAIRSVILLE     48  67  38  72 /  40   5  10   5
CARTERSVILLE    44  70  39  74 /  30   5   5   5
COLUMBUS        55  77  45  79 /  20   5   5   5
GAINESVILLE     50  71  45  73 /  40   5  10   5
MACON           50  78  41  81 /  20   5   5   5
ROME            46  71  43  73 /  30   5  10   5
PEACHTREE CITY  46  72  37  76 /  20   5   5   5
VIDALIA         57  78  50  80 /  20   5   5   5

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

BDL

Hazardous weather outlook, Sep 28, 4:45 PM EDT, 2 hours 16 minutes before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
445 PM EDT THU SEP 28 2006

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-291230-
BALDWIN-BANKS-BARROW-BARTOW-BIBB-BLECKLEY-BUTTS-CARROLL-CATOOSA-
CHATTAHOOCHEE-CHATTOOGA-CHEROKEE-CLARKE-CLAYTON-COBB-COWETA-
CRAWFORD-CRISP-DADE-DAWSON-DEKALB-DODGE-DOOLY-DOUGLAS-EMANUEL-
FANNIN-FAYETTE-FLOYD-FORSYTH-GILMER-GLASCOCK-GORDON-GREENE-
GWINNETT-HALL-HANCOCK-HARALSON-HARRIS-HEARD-HENRY-HOUSTON-JACKSON-
JASPER-JEFFERSON-JOHNSON-JONES-LAMAR-LAURENS-LUMPKIN-MACON-
MADISON-MARION-MERIWETHER-MONROE-MONTGOMERY-MORGAN-MURRAY-
MUSCOGEE-NEWTON-NORTH FULTON-OCONEE-OGLETHORPE-PAULDING-PEACH-
PICKENS-PIKE-POLK-PULASKI-PUTNAM-ROCKDALE-SCHLEY-SOUTH FULTON-
SPALDING-STEWART-SUMTER-TALBOT-TALIAFERRO-TAYLOR-TELFAIR-TOOMBS-
TOWNS-TREUTLEN-TROUP-TWIGGS-UNION-UPSON-WALKER-WALTON-WARREN-
WASHINGTON-WEBSTER-WHEELER-WHITE-WHITFIELD-WILCOX-WILKES-
WILKINSON-
445 PM EDT THU SEP 28 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH AND CENTRAL GEORGIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT
ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE OVER PORTIONS OF NORTH
GEORGIA FOR THE REST OF THIS AFTERNOON AND EARLY EVENING.

.SYNOPSIS...
A STRONG COLD FRONT ACROSS EXTREME NORTH GEORGIA WILL CONTINUE
MOVING SOUTH INTO CENTRAL GEORGIA TONIGHT.

.PRIMARY HAZARDS...
THE PRIMARY HAZARDS WILL BE OCCASIONAL CLOUD TO GROUND LIGHTNING...
LARGE HAIL...AND DAMAGING WINDS. LOCALLY HEAVY RAIN IS ALSO
POSSIBLE.

.DISCUSSION...
FORCING ALONG THE COLD FRONT HAS AND WILL TRIGGER THUNDERSTORMS FOR
THE REST OF THIS AFTERNOON AND EARLY EVENING. CAPE VALUES WILL
REMAIN IN THE 1000 TO 1500 RANGE WITH LIFTED INDICES OF ZERO TO -3.
A COLD POOL ALOFT WILL ALSO HELP DESTABILIZE THE ATMOSPHERE. THERE
WILL BE ENOUGH INSTABILITY FOR A FEW THUNDERSTORMS TO REACH SEVERE
LEVELS. THE MAIN THREAT WILL BE HAIL UP TO 1 INCH AND WINDS GUSTING
TO NEAR 50 MPH. THE MAIN THREAT WILL BE NORTH OF AN ATLANTA TO
ATHENS LINE AND THROUGH 8 PM. AFTERWARDS THE ATMOSPHERE WILL BEGIN
TO STABILIZE AND THE THREAT OF SEVERE THUNDERSTORMS WILL END.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
NO HAZARDOUS WEATHER IS EXPECTED THROUGH THE PERIOD.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS SHOULD MONITOR THE LATEST INFORMATION THIS AFTERNOON AND
EVENING FOR POSSIBLE ACTIVATION.

In the hours before

Special weather statement, Sep 28, 6:10 PM EDT, 51 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
610 PM EDT THU SEP 28 2006

GAZ053-054-282235-
610 PM EDT THU SEP 28 2006

...SIGNIFICANT WEATHER ALERT FOR PEA SIZED HAIL AND 40 MPH WINDS IN
SOUTHERN COWETA AND SOUTHERN FAYETTE COUNTIES UNTIL 635 PM EDT...

AT 606 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER SHARPSBURG...MOVING EAST AT 40 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT MOVES ACROSS
COWETA AND FAYETTE COUNTIES THROUGH 635 PM EDT. SOME LOCATIONS IN THE
PATH OF THIS STORM INCLUDE SHARPSBURG...SENOIA...BROOKS...STARRS
MILL...WOOLSEY AND INMAN.

15

Local storm report, Sep 28, 6:12 PM EDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
612 PM EDT THU SEP 28 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0505 PM     HAIL             MABLETON                33.81N 84.56W
09/28/2006  E0.88 INCH       COBB               GA   PUBLIC

0515 PM     HAIL             3 SSE VININGS           33.82N 84.45W
09/28/2006  E0.75 INCH       FULTON             GA   PUBLIC

0530 PM     HAIL             CLARKSTON               33.81N 84.24W
09/28/2006  E0.75 INCH       DEKALB             GA   PUBLIC

&&

VSMITH

Special weather statement, Sep 28, 6:14 PM EDT, 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
614 PM EDT THU SEP 28 2006

GAZ025-027-036-037-049-282245-
614 PM EDT THU SEP 28 2006

...SIGNIFICANT WEATHER ALERT FOR PEA SIZED HAIL IN MORGAN...OCONEE...
CLARKE...MADISON AND JACKSON COUNTIES UNTIL 645 PM EDT...

AT 611 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF STRONG THUNDERSTORMS ACROSS EASTERN WALTON COUNTY AND
SOUTHERN JACKSON COUNTY...MOVING EAST AT 45 MPH.

WIND GUSTS OF 45 MPH AND PEA SIZED HAIL ARE LIKELY AS THESE STORMS
MOVE ACROSS MORGAN...OCONEE...CLARKE...MADISON AND JACKSON COUNTIES
THROUGH 645 PM EDT. SOME LOCATIONS IN THE PATH OF THE STORM INCLUDE
EASTVILLE...BOGART...WATKINSVILLE...NICHOLSON...ATHENS...CENTER...WHI
TEHALL...GAINES SCHOOL...NEESE...WINTERVILLE...ILA...HULL...DIAMOND
HILL...DANIELSVILLE AND COLBERT.

THE STORMS SHOULD LEAVE THIS AREA BY 645 PM EDT.

Local storm report, Sep 28, 6:18 PM EDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
618 PM EDT THU SEP 28 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0505 PM     HAIL             WOODSTOCK               34.10N 84.51W
09/28/2006  E0.75 INCH       CHEROKEE           GA   PUBLIC

&&

VSMITH

Local storm report, Sep 28, 6:56 PM EDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
656 PM EDT THU SEP 28 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0620 PM     HAIL             5 N LA GRANGE           33.11N 85.03W
09/28/2006  E0.75 INCH       TROUP              GA   AMATEUR RADIO

&&

VSMITH

Special weather statement, Sep 28, 6:57 PM EDT, 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
657 PM EDT THU SEP 28 2006

GAZ056-282330-
657 PM EDT THU SEP 28 2006

...SIGNIFICANT WEATHER ALERT FOR PEA SIZED HAIL AND 45 MPH WINDS IN
SPALDING COUNTY UNTIL 730 PM EDT...

AT 652 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 6 MILES WEST OF ZETELLA...MOVING EAST AT 45 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 45 MPH AS IT MOVES ACROSS
SPALDING COUNTY THROUGH 730 PM EDT. SOME LOCATIONS IN THE PATH OF
THIS STORM INCLUDE ZETELLA...RIO...GRIFFIN...EXPERIMENT AND TOWALAGA.

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 2:28 PM EDT	Severe Thunderstorm Warning	FFC	Bartow	22 min
Sep 28, 2:40 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee	35 min
Sep 28, 2:45 PM EDT	Severe Thunderstorm Warning	FFC	Banks	30 min
Sep 28, 2:55 PM EDT	Severe Thunderstorm Warning	FFC	Fulton	35 min
Sep 28, 3:10 PM EDT	Severe Thunderstorm Warning	FFC	Forsyth	35 min
Sep 28, 3:21 PM EDT	Severe Thunderstorm Warning	FFC	Gwinnett, Hall	30 min
Sep 28, 5:02 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee	13 min
Sep 28, 5:04 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Douglas	11 min
Sep 28, 5:09 PM EDT	Severe Thunderstorm Warning	FFC	Fulton	23 min
Sep 28, 5:22 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb	23 min
Sep 28, 6:13 PM EDT	Severe Thunderstorm Warning	FFC	Troup	19 min
Sep 28, 6:27 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether	33 min
Sep 28, 7:14 PM EDT	Severe Thunderstorm Warning	FFC	Henry	31 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2006 Every severe thunderstorm warning in 2006

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.