Alert archive / Georgia / Special Weather Statements in 2011

Special Weather Statement, NWS Atlanta, GA

October 13, 2011Dodge County, Georgia

NWS Atlanta, GA issued this special weather statement at Oct 13, 2011, 5:50 PM EDT for Dodge County, Georgia. It was in force for 25 min. 2 reports 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: Oct 13, 2011, 5:50 PM EDT (21:50 UTC)
Expired: Oct 13, 2011, 6:15 PM EDT
In force: 25 min
Issued by: NWS Atlanta, GA

County Dodge County, GA

The radar

The Robins AFB radar (KJGX), 72 km from the middle of the area, began a volume at 21:50 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
Oct 13, 6:07 PM EDT	TSTM WND GST 60	1 Wnw Mcrae, GA
Oct 13, 6:07 PM EDT	HAIL 1	1 Wnw Mcrae, GA

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.8 hours before the alert went out and 196 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: 314 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 461 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

796 
WWUS82 KFFC 132150
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
550 PM EDT THU OCT 13 2011

GAZ109-110-132215-
550 PM EDT THU OCT 13 2011

...SIGNIFICANT WEATHER ADVISORY FOR NICKEL SIZED HAIL AND 40 MPH 
WINDS IN NORTHERN TELFAIR AND DODGE COUNTIES UNTIL 615 PM EDT...

AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS FROM UNION TO TEMPERANCE...MOVING EAST AT 50
MPH.

WIND GUSTS OF 40 MPH WILL BE POSSIBLE WITH THESE 
THUNDERSTORMS...ALONG WITH PENNY TO NICKEL-SIZED HAIL. 

&&

LAT...LON 3195 8324 3198 8329 3200 8328 3201 8330
      3207 8330 3210 8333 3213 8331 3215 8332
      3222 8303 3215 8299 3219 8288 3218 8287
      3213 8294 3207 8288 3201 8273 3196 8270
      3187 8318
TIME...MOT...LOC 2148Z 256DEG 43KT 3210 8320 3195 8311

$$



19

What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Oct 13, 3:22 PM EDT, 2 hours 28 minutes earlier.

Area forecast discussion, Oct 13, 3:22 PM EDT, 2 hours 28 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
322 PM EDT THU OCT 13 2011

.SHORT TERM /TONIGHT THROUGH SATURDAY/...
PRIMARY CONCERNS IN THE SHORT TERM PERIOD IS LIKELIHOOD...COVERAGE
AND INTENSITY OF CONVECTION THIS AFTERNOON AND EVENING. VIGOROUS
NEGATIVELY TILTED WAVE CONTINUES TO DIG INTO SOUTHEAST CONUS
TODAY. VORT MAX CURRENTLY LOCATED OVER NORTHERN AL. ALREADY HAVE
SEEN WIND DAMAGE WITH STORM NORTH OF COLUMBUS THIS AFTERNOON.
MLCAPE NOT TOO BAD FOR OCTOBER WITH VALUES APPROACHING 1000 J/KG.
COLD CORE H5 LOW HAS PRETTY COOL TEMPS ASSOCD WITH THIS SO WOULD
NOT BE SURPRISED TO SEE 500-1000 J/KG CAPE EXTEND NORTH INTO FAR
NORTH GA EVEN WITH COOLER SFC TEMPS. FORTUNATELY...VERTICAL WIND
SHEAR SOMEWHAT WEAK WITH 0-1KM BULK SHEAR OF 10-20KTS...0-6KM
SHEAR OF 30KTS AND 0-1KM SRH OF 100 M2/S2. ANY ADDITIONAL STORMS
THIS AFTERNOON AND EARLY EVENING COULD PRODUCE HAIL UP TO 1 INCH
AND DAMAGING WINDS WITH ANY LINEAR AND PARTICULARLY ANY QUASI-
LINEAR STORM STRUCTURES THAT DEVELOP.

AS WAVE MOVES THROUGH THIS EVENING...SHARP EDGE TO PRECIP EXPECTED
ALONG AND SOUTH OF H5 TROUGH/VORT MAX. COULD SEE SOME LINGERING
SHOWERS IN FAR NORTHERN ZONES AFTER MIDNIGHT...BUT MOST AREAS WILL
BE PRECIP FREE THEN. VERY GOOD AGREEMENT WITH SHORT TERM MODELS ON
TIMING AND LOCATION.

WINDS WILL BECOME GUSTY AS COLD ADVECTION ENHANCES VERTICAL MIXING
FRIDAY AFTERNOON. SHOULD NOT REACH ADVISORY CRITERIA BUT WILL BE
STRONGER THAN MOS GUIDANCE INDICATES.

USED BIAS ADJUSTED GRIDDED MOS FOR MAX AND MIN TEMPS. SOME TWEAK
DOWNWARD FOR MAX TEMP ON SATURDAY DUE TO THICKER HIGH CLOUDS AND
CONTINUED LOW LEVEL COLD ADVECTION. STARTED WITH MET GUIDANCE WITH
A LITTLE DOWNWARD ADJUSTMENT FOR DEWPOINTS THIS WEEKEND AS BIAS
CORRECTED GRIDDED MOS WAS WAY TOO MOIST BEHIND FRONT.

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
NO MAJOR CHANGES SEEN WITH MODEL GUIDANCE IN THE LONG TERM PERIOD.
TROPICAL LOW DEVELOPED BY MODELS NEAR YUCATAN PENINSULA ON SUNDAY.
NAM IS A BIG OUTLIER WITH THIS SYSTEM WHICH SHOULD MOVE WEST INTO
BAY OF CAMPECHE IN SWRN GULF NEXT WEEK. DRY PATTERN OVER THE CONUS
WITH ZONAL FLOW. BY TUESDAY...GFS AND ECMWF DIG WAVE FROM THE
CENTRAL ROCKIES INTO THE MID SOUTH RESULTING IN SW FLOW ALOFT OVER
THE SOUTHEAST. BEST CHC FOR PRECIP SHOULD BE TUESDAY. NO
SIGNIFICANT CHANGES MADE TO FCST IN THIS PERIOD.

SNELSON

&&

.FIRE WEATHER...
WINDS WILL BECOME GUSTY FRIDAY AFTERNOON BEHIND STORM SYSTEM.
COULD SEE DEWPOINTS DROP A LITTLE MORE THAN EXPECTED AS WELL.
COULD APPROACH FIRE DANGER CRITERIA...ESP IN MIDDLE GEORGIA WHERE
IT APPEARS IT WILL BE DRIER. SAVING GRACE MAY BE FUELS WHICH
SHOULD REMAIN WET FROM EARLIER RAINFALL. WILL CONTINUE TO MONITOR
THIS BUT NO PLANS FOR ANY DANGER STATEMENTS OR WARNINGS.

&&

.AVIATION... 18Z UPDATE...
BIG CONCERN WILL BE AFTERNOON AND EVENING CONVECTION ACROSS THE
AREA. GENERALLY EXPECTING VFR CONDITIONS...WITH MVFR IN CONVECTION.
MODELS INDICATING BEST CONVECTION WILL SHIFT FURTHER SOUTH THROUGH
THE EVENING...BUT OVERALL STILL SOME UNCERTAINTY WITH THE TIMING
AND DEVELOPMENT OF THE WAVES OF ACTIVITY. WSW SURFACE WINDS AT
10-12KTS THIS AFTERNOON WITH GUSTS TO 18-23KTS EXPECTED...THEN
8-10KTS OVERNIGHT...WITH WNW WINDS AND 20-25KT GUSTS AGAIN DURING
THE DAY FRIDAY. EXPECT SKC BY 09-10Z.

//ATL CONFIDENCE...18Z UPDATE...
HIGH CONFIDENCE ON ALL ELEMENTS...EXCEPT FOR MEDIUM CONFIDENCE ON
TIMING...CIGS...AND VSBY 18-00Z.

31

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          53  79  50  78 /  40   0   5   5
ATLANTA         55  76  54  76 /  20   0   5   5
BLAIRSVILLE     51  68  45  66 /  40   0   5   5
CARTERSVILLE    52  74  48  73 /  20   0   5   5
COLUMBUS        57  80  55  81 /  20   0   5   5
GAINESVILLE     55  75  52  73 /  40   0   5   5
MACON           54  80  50  81 /  30   0   5   5
ROME            51  74  48  74 /  20   0   5   5
PEACHTREE CITY  52  77  48  77 /  20   0   5   5
VIDALIA         57  80  52  82 /  60   0   5   5

&&

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

13

Hazardous weather outlook, Oct 13, 4:19 AM EDT, 13 hours 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
419 AM EDT THU OCT 13 2011

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-141100-
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-
419 AM EDT THU OCT 13 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH AND CENTRAL GEORGIA.

.DAY ONE...TODAY AND TONIGHT
ISOLATED SEVERE THUNDERSTORMS POSSIBLE OVER NORTH AND CENTRAL
GEORGIA FROM LATE MORNING THROUGH THIS EVENING.

.SYNOPSIS...
A COLD FRONT WILL APPROACH NORTH GEORGIA THIS AFTERNOON...THEN
MOVE ACROSS THE AREA DURING THE EVENING. HIGH PRESSURE WILL BEGIN
TO BUILD LATE TONIGHT.

.PRIMARY HAZARDS...
THE PRIMARY HAZARDS WITH ANY SEVERE THUNDERSTORMS WILL BE QUARTER-
SIZE HAIL AND DAMAGING WINDS. OCCASIONAL LIGHTNING CAN ALSO BE
EXPECTED. THE MOST LIKELY TIME FOR SEVERE WEATHER WILL BE FROM
LATE MORNING INTO EARLY EVENING ACROSS NORTH AND CENTRAL GEORGIA.

.DISCUSSION...
A STRONG UPPER TROUGH AND ASSOCIATED COLD FRONT WILL MOVE ACROSS THE
AREA THIS EVENING. AHEAD OF THE APPROACHING COLD FRONT...MOST UNSTABLE
CAPES WILL INCREASE TO AROUND 1000 DURING THE AFTERNOON. THIS COUPLED
WITH VERY COLD TEMPERATURES ALOFT WILL BRING A POTENTIAL FOR ISOLATED
STRONG TO SEVERE THUNDERSTORMS...MAINLY DURING THE AFTERNOON AND
EARLY EVENING HOURS. THE SEVERE THUNDERSTORM THREAT WILL GREATLY
DIMINISH ACROSS NORTH GEORGIA BY 9 PM...AND CENTRAL GEORGIA BY
MIDNIGHT AS THE FRONT PUSHES EAST AND SOUTH OF THE AREA.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
WINDY CONDITIONS ARE EXPECTED FRIDAY AND SATURDAY MAINLY ACROSS
NORTH GEORGIA. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS
TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED THROUGH TONIGHT.

In the hours before

Special weather statement, Oct 13, 5:19 PM EDT, 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
519 PM EDT THU OCT 13 2011

GAZ085-097-132145-
519 PM EDT THU OCT 13 2011

...SIGNIFICANT WEATHER ADVISORY FOR DIME SIZED HAIL IN LAURENS AND
JOHNSON COUNTIES UNTIL 545 PM EDT...

AT 514 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER CHAPPELLS MILL...MOVING EAST AT 40 MPH.

&&

LAT...LON 3272 8245 3269 8250 3266 8249 3252 8300
      3266 8306 3270 8296 3273 8295 3279 8278
      3277 8276 3279 8270 3278 8266 3282 8256
      3282 8252 3276 8244
TIME...MOT...LOC 2118Z 248DEG 35KT 3263 8295

19

Special weather statement, Oct 13, 5:24 PM EDT, 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
524 PM EDT THU OCT 13 2011

GAZ108-132200-
524 PM EDT THU OCT 13 2011

...SIGNIFICANT WEATHER ADVISORY FOR NICKEL SIZED HAIL IN WILCOX
COUNTY UNTIL 600 PM EDT...

AT 519 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER DOUBLE RUN...MOVING EAST AT 45 MPH.

THIS THUNDERSTORM WILL BE CAPABLE OF PRODUCING PENNY TO NICKEL-SIZED
HAIL AND WIND GUSTS TO 40 MPH AS IT MOVES TOWARD ROCHELLE AND
ANTIOCH CHURCH.

&&

LAT...LON 3185 8361 3199 8361 3210 8333 3209 8330
      3202 8329 3201 8330 3200 8328 3198 8329
      3195 8326 3195 8324 3190 8320 3184 8348
TIME...MOT...LOC 2123Z 256DEG 38KT 3190 8351

19

Local storm report, Oct 13, 5:31 PM EDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
531 PM EDT THU OCT 13 2011

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

0333 PM     TSTM WND DMG     MACON                   32.83N 83.64W
10/13/2011                   BIBB               GA   BROADCAST MEDIA

            WGXA-TV RELAYED A PUBLIC REPORT OF A DOWNED TREE ON
            CULVER STREET IN MACON.

0506 PM     HAIL             4 S CORDELE             31.91N 83.77W
10/13/2011  E0.75 INCH       CRISP              GA   EMERGENCY MNGR

            CRISP COUNTY EMERGENCY MANAGEMENT RELAYED A REPORT OF
            DIME SIZED HAIL NEAR THE INTERSECTION OF HWY 41 AND HWY
            33.

0508 PM     HAIL             2 ENE ARABI             31.84N 83.71W
10/13/2011  E1.00 INCH       CRISP              GA   PUBLIC

            PUBLIC REPORTED QUARTER SIZED HAIL AT THE PLANTATION
            HOUSE NEAR ARABI.

&&

RGARCIA

Local storm report, Oct 13, 5:32 PM EDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
532 PM EDT THU OCT 13 2011

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

0506 PM     TSTM WND DMG     5 SW CORDELE            31.91N 83.84W
10/13/2011                   CRISP              GA   EMERGENCY MNGR

            CRISP COUNTY EMA RELAYED A REPORT OF A DOWNED TREE NEAR
            THE INTERSECTION OF ANTIOCH AND RANGE STATION ROADS.

&&

RGARCIA

Special weather statement, Oct 13, 5:39 PM EDT, 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
539 PM EDT THU OCT 13 2011

GAZ016-023-132215-
539 PM EDT THU OCT 13 2011

...SIGNIFICANT WEATHER ADVISORY FOR DIME SIZED HAIL AND 40 MPH WINDS
IN WHITE AND HALL COUNTIES UNTIL 615 PM EDT...

AT 536 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER CLERMONT...MOVING NORTHEAST AT 40 MPH.

WIND GUSTS OF 40 MPH ARE LIKELY AS THESE STORMS MOVE ACROSS WHITE AND
HALL COUNTIES THROUGH 615 PM EDT. SOME LOCATIONS IN THE PATH OF THESE
STORMS INCLUDE CLERMONT...LEAF AND MOSSY CREEK.

&&

LAT...LON 3463 8363 3458 8363 3454 8361 3451 8365
      3445 8362 3443 8362 3433 8386 3446 8390
      3450 8384 3454 8384 3464 8365
TIME...MOT...LOC 2139Z 241DEG 45KT 3450 8372

Special weather statement, Oct 13, 5:50 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
550 PM EDT THU OCT 13 2011

GAZ109-110-132215-
550 PM EDT THU OCT 13 2011

...SIGNIFICANT WEATHER ADVISORY FOR NICKEL SIZED HAIL AND 40 MPH
WINDS IN NORTHERN TELFAIR AND DODGE COUNTIES UNTIL 615 PM EDT...

AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS FROM UNION TO TEMPERANCE...MOVING EAST AT 50
MPH.

WIND GUSTS OF 40 MPH WILL BE POSSIBLE WITH THESE
THUNDERSTORMS...ALONG WITH PENNY TO NICKEL-SIZED HAIL.

&&

LAT...LON 3195 8324 3198 8329 3200 8328 3201 8330
      3207 8330 3210 8333 3213 8331 3215 8332
      3222 8303 3215 8299 3219 8288 3218 8287
      3213 8294 3207 8288 3201 8273 3196 8270
      3187 8318
TIME...MOT...LOC 2148Z 256DEG 43KT 3210 8320 3195 8311

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 13, 1:23 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Muscogee	37 min
Oct 13, 2:00 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Talbot	30 min
Oct 13, 2:03 PM EDT	Special Weather Statement	FFC	Meriwether	27 min
Oct 13, 2:28 PM EDT	Special Weather Statement	FFC	Pike, Talbot, Upson	32 min
Oct 13, 2:58 PM EDT	Special Weather Statement	FFC	Crawford, Lamar, Monroe, Taylor	32 min
Oct 13, 3:20 PM EDT	Special Weather Statement	FFC	Bibb, Jones	25 min
Oct 13, 3:42 PM EDT	Special Weather Statement	FFC	Baldwin, Bibb, Jasper, Jones, Putnam, Twiggs	33 min
Oct 13, 3:56 PM EDT	Special Weather Statement	FFC	Chattahoochee, Marion, Stewart	34 min
Oct 13, 4:17 PM EDT	Special Weather Statement	FFC	Baldwin, Greene, Hancock, Washington, Wilkinson	28 min
Oct 13, 4:30 PM EDT	Special Weather Statement	FFC	Macon, Marion, Schley, Webster	30 min
Oct 13, 4:31 PM EDT	Special Weather Statement	FFC	Wilkes	29 min
Oct 13, 4:49 PM EDT	Special Weather Statement	FFC	Glascock, Jefferson, Warren, Washington	26 min
Oct 13, 5:03 PM EDT	Severe Thunderstorm Warning	FFC	Crisp	27 min
Oct 13, 5:19 PM EDT	Special Weather Statement	FFC	Johnson	26 min
Oct 13, 5:24 PM EDT	Special Weather Statement	FFC	Wilcox	36 min
Oct 13, 5:39 PM EDT	Special Weather Statement	FFC	White	36 min
Oct 13, 6:03 PM EDT	Severe Thunderstorm Warning	FFC	Telfair, Wheeler	42 min
Oct 13, 6:12 PM EDT	Special Weather Statement	FFC	Carroll	33 min
Oct 13, 6:15 PM EDT	Special Weather Statement	FFC	Treutlen	30 min
Oct 13, 6:28 PM EDT	Severe Thunderstorm Warning	FFC	Montgomery, Toombs	47 min
Oct 13, 6:55 PM EDT	Special Weather Statement	FFC	Candler	35 min
Oct 13, 7:02 PM EDT	Special Weather Statement	FFC	Coweta	28 min
Oct 13, 7:36 PM EDT	Special Weather Statement	FFC	Coweta	24 min

Nearby

Special Weather Statements in Georgia, 2011 Every special weather statement 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.