Special Weather Statement, NWS Atlanta, GA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
353 PM EDT MON JUN 27 2011

.SHORT TERM /TONIGHT THROUGH WEDNESDAY NIGHT/...
DIFFICULT PRECIP FORECAST OVER THE NEXT 24 TO 48 HOURS DUE TO LACK
OF CONSENSUS BETWEEN THE MODELS. ALTHOUGH MORNING AND EARLY
AFTERNOON SHOWER AND THUNDERSTORM ACTIVITY HAS BEGUN TO TAPER
OFF...EXPECT SECOND WAVE OF CONVECTION BY EARLY EVENING. MCS IN THE
TN VALLEY IS EXPECTED TO DROP SOUTHWARD INTO AL AND GA LATER TODAY.
AS A RESULT...A FEW OF THE SHORT RANGE...HI RES MODELS ARE
INDICATING ADDITIONAL THUNDERSTORM DEVELOPMENT NOT TOO DISSIMILAR TO
THE ACTIVITY YESTERDAY. EXPECT THIS SECOND WAVE TO BE MORE ORGANIZED
THAN THE PULSE ACTIVITY THIS MORNING...BUT WITH LITTLE TO NO POPS IN
THE MAV AND MET...UNCERTAINTY IS HIGH. HAVE GONE AGAINST GUIDANCE
AND INDICATED GOOD CHANCE TO LIKELY POPS OVERNIGHT. PRIMARY HAZARDS
ASSOCIATED WITH THIS ACTIVITY WILL BE FREQUENT LIGHTNING...AND
DAMAGING WINDS...ALTHOUGH SMALL HAIL IS NOT OUT OF THE QUESTION.

MODELS IN BETTER AGREEMENT TUESDAY...WITH COLD FRONT PUSHING ACROSS
THE STATE INTO CENTRAL GEORGIA BY EARLY WEDNESDAY. EXPECT DIURNAL
HEATING TO INCREASE INTENSITY AND COVERAGE OF THE ACTIVITY...SO HAVE
GONE WITH LIKELY TO CATEGORICAL POPS THROUGH THE DAY...AND THEN GOOD
CHANCE OVERNIGHT TUESDAY INTO WEDNESDAY. FRONT PUSHES INTO SOUTHERN
GEORGIA AND NORTHERN FLORIDA BY WEDNESDAY NIGHT...SO HAVE CONTINUED
WITH GOOD CHANCE TO LIKELY POPS ACROSS THE VERY SOUTHERN PORTION OF
THE CWA. SPC ALREADY HAS PORTIONS OF WESTERN GA IN THE SLIGHT RISK
AREA FOR DAY 2.

AS FAR AS TEMPERATURES ARE CONCERNED...HAVE GONE WITH SLIGHTLY
COOLER THAN MAV TEMPS FOR HIGHS AND SLIGHTLY WARMER THAN MAV/MET FOR
LOWS TO ACCOUNT FOR AMPLE CLOUD COVER AND PRECIP ACTIVITY.

31

.LONG TERM /THURSDAY THROUGH MONDAY/...
STRONG 500 MB HIGH PRESSURE RIDGE DEVELOPS OVER THE CENTRAL US BY
LATE WEEK AND INTO THE WEEKEND. AS THIS RIDGE REMAINS IN PLACE
THROUGH THE LONG TERM...EXPECT GENERALLY DIURNALLY DRIVEN
CONVECTION. WITH NO MAJOR CHANGES IN MODEL SOLUTIONS THROUGH NEXT
WEEK...HAVE CONTINUED WITH THE CURRENT FORECAST WITH LITTLE
REVISIONS.

31

&&

.AVIATION...
18Z UPDATE...
VFR AT ALL TAF SITES THROUGH THE FORECAST PERIOD...BUT TSRA IS
EXPECTED TO LOWER SITES TO AT LEAST MVFR. SOME TSRA COULD BRING
WINDS GUSTING UP TO 35KT. TSRA THREAT SHOULD DIMINISH AT ALL SITES
BY 03Z AS FORECAST LINE MOVES THROUGH...WITH CONVECTION START UP
TOMORROW AFTER 14Z. WINDS EXPECTED TO STAY WESTERLY.

//ATL CONFIDENCE...18Z UPDATE...
HIGH CONFIDENCE ON WINDS AND CIGS.
MEDIUM CONFIDENCE ON VSBYS.
LOW CONFIDENCE ON TIMING OF TSRA.
PREFERRED NAM BUFR AND HRRR GUIDANCE OVER GFS BUFR.

10

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          72  94  71  94 /  60  60  40  20
ATLANTA         74  90  73  92 /  60  60  30  20
BLAIRSVILLE     67  85  68  89 /  60  70  50  10
CARTERSVILLE    69  91  69  91 /  60  70  40  10
COLUMBUS        73  93  75  93 /  60  60  40  50
GAINESVILLE     73  89  71  89 /  60  70  50  10
MACON           72  94  73  94 /  60  60  40  50
ROME            70  93  69  90 /  60  70  40  10
PEACHTREE CITY  69  91  70  91 /  60  60  30  20
VIDALIA         73  91  76  92 /  60  60  50  60

&&

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

31/10

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1119 AM EDT MON JUN 27 2011

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-281530-
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-
1119 AM EDT MON JUN 27 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH AND CENTRAL GEORGIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT
SCATTERED THUNDERSTORMS AND ISOLATED SEVERE THUNDERSTORMS EXPECTED
TODAY AND TONIGHT.

.SYNOPSIS...
A COMPLEX OF THUNDERSTORMS OVER NORTHERN MISSOURI AND CENTRAL ILLINOIS
WILL CONTINUE MOVING SOUTHEAST THROUGH TONIGHT. THESE
THUNDERSTORMS ARE EXPECTED TO MOVE INTO NORTH GEORGIA THIS
AFTERNOON.

.PRIMARY HAZARDS...
THE PRIMARY HAZARD FROM ISOLATED SEVERE THUNDERSTORMS WILL BE
FREQUENT CLOUD TO GROUND LIGHTNING AND GUSTY WINDS TO 60 MPH. THE
BEST LOCATION FOR ISOLATED SEVERE STORMS WILL BE ACROSS NORTH
AND CENTRAL GEORGIA THIS AFTERNOON AND TONIGHT.

.DISCUSSION...
A COMPLEX OF THUNDERSTORMS OVER NORTHERN MISSOURI AND CENTRAL ILLINOIS
WILL CONTINUE MOVING SOUTHEAST THROUGH TONIGHT. INSTABILITY
INDICES ARE EXPECTED TO BE STRONG TODAY WITH CAPES GETTING INTO
THE 2000-3000 RANGE AND LIFTED INDICES AROUND -4 TO -5 ACROSS GEORGIA.
THERE IS AN UPPER LEVEL RIDGE BUILDING IN ACROSS THE SOUTHERN
STATES WHICH WILL HELP CAP THE ATMOSPHERE BUT IT DOES NOT LOOK
STRONG ENOUGH TO KEEP ISOLATED SEVERE STORMS FROM DEVELOPING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
ISOLATED TO SCATTERED THUNDERSTORMS EXPECTED EACH DAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS ACTIVATION IS NOT REQUESTED BUT SPOTTERS ARE ENCOURAGED
TO SUBMIT REPORTS OF SEVERE WEATHER THROUGH THE WEB BY GOING TO
WEATHER.GOV/ATLANTA.

10

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
251 PM EDT MON JUN 27 2011

GAZ056-057-271915-
251 PM EDT MON JUN 27 2011

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 40 MPH WINDS
IN SPALDING AND HENRY COUNTIES UNTIL 315 PM EDT...

AT 248 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER SUNNY SIDE...MOVING SOUTHEAST AT 15 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
SPALDING AND HENRY COUNTIES THROUGH 315 PM EDT. SOME LOCATIONS IN THE
PATH OF THIS STORM INCLUDE BIRDIE...VAUGHN...SUNNY SIDE...ATLANTA
MOTOR SPEEDWAY...HAMPTON...LUELLA...HIGHLAND MILLS...TOWALAGA...
EXPERIMENT...WALKER MILL...ROVER...GRIFFIN AND ORCHARD HILL. BRIEF
HEAVY DOWNPOURS WILL CAUSE PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3329 8442 3332 8438 3335 8439 3336 8435
      3341 8436 3343 8432 3343 8430 3345 8429
      3345 8428 3328 8409 3325 8412 3318 8413
      3319 8433 3327 8440
TIME...MOT...LOC 1851Z 322DEG 15KT 3332 8430

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
342 PM EDT MON JUN 27 2011

GAZ066-067-272015-
342 PM EDT MON JUN 27 2011

...SIGNIFICANT WEATHER ADVISORY FOR DIME SIZED HAIL AND 40 MPH WINDS
IN TROUP AND MERIWETHER COUNTIES UNTIL 415 PM EDT...

AT 339 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER STOVALL...MOVING SOUTH AT 10 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE DIME SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT MOVES ACROSS
TROUP AND MERIWETHER COUNTIES THROUGH 415 PM EDT. SOME LOCATIONS IN
THE PATH OF THIS STORM INCLUDE ODESSADALE...BIG SPRINGS...
MOUNTVILLE...STOVALL AND DURAND. BRIEF HEAVY DOWNPOURS WILL CAUSE
PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3306 8495 3305 8476 3287 8471 3287 8497
      3288 8499
TIME...MOT...LOC 1942Z 006DEG 8KT 3296 8486

16

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
353 PM EDT MON JUN 27 2011

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

0348 PM     HAIL             5 SE LAGRANGE           32.99N 84.96W
06/27/2011  E0.75 INCH       TROUP              GA   PUBLIC

            PUBLIC REPORTS DIME SIZED HAIL WHILE DRIVING ON
            INTERSTATE 185 NORTH OF EXIT 42.

&&

RGARCIA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
416 PM EDT MON JUN 27 2011

GAZ066-067-078-272045-
416 PM EDT MON JUN 27 2011

...SIGNIFICANT WEATHER ADVISORY FOR DIME SIZED HAIL AND 40 MPH WINDS
IN TROUP...MERIWETHER AND HARRIS COUNTIES UNTIL 445 PM EDT...

AT 412 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED STRONG
THUNDERSTORMS FROM AROUND PINE MOUNTAIN-CALLAWAY GARDENS TO PIEDMONT
HEIGHTS...MOVING SOUTH AT 10 MPH.

THESE STORMS HAVE THE POTENTIAL TO PRODUCE DIME SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS THEY MOVE
ACROSS TROUP...MERIWETHER AND HARRIS COUNTIES THROUGH 445 PM EDT.
SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE STOVALL...
DURAND...CANNONVILLE...STATE LINE PARK...SMITHS CROSSROAD...BAUGHS
CROSSROADS...BIG SPRINGS...LONG CANE...PIEDMONT HEIGHTS...PINE
MOUNTAIN-CALLAWAY GARDENS...F.D. ROOSEVELT STATE PARK...JONES
CROSSROADS...WEST POINT...SHILOH AND WHITESVILLE-PINE LAKE. HEAVY
DOWNPOURS WILL CAUSE PONDING OF WATER ON ROADWAYS.

THESE WIND GUSTS MAY PRODUCE MINOR DAMAGE TO TREE LIMBS AND BLOW
LIGHT...UNSECURED OBJECTS AROUND.

SIGNIFICANT WEATHER ADVISORIES ARE ISSUED FOR WINDS UP TO 50 MPH...
HAIL LESS THAN THE SIZE OF QUARTERS...OR SIGNIFICANT CLOUD-TO-GROUND
LIGHTNING.

&&

LAT...LON 3302 8509 3301 8474 3278 8469 3275 8515
      3278 8513 3280 8517 3283 8517 3284 8516
      3287 8519 3302 8522
TIME...MOT...LOC 2015Z 010DEG 8KT 3290 8489 3292 8518
          3294 8526

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
429 PM EDT MON JUN 27 2011

GAZ005-007-272100-
429 PM EDT MON JUN 27 2011

...SIGNIFICANT WEATHER ADVISORY FOR DIME SIZED HAIL AND 40 MPH WINDS
IN MURRAY AND GILMER COUNTIES UNTIL 500 PM EDT...

AT 425 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER CHATSWORTH...MOVING SOUTHEAST AT 15 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE DIME SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT MOVES ACROSS
MURRAY AND GILMER COUNTIES THROUGH 500 PM EDT. SOME LOCATIONS IN THE
PATH OF THIS STORM INCLUDE THE NORTH GEORGIA SPEEDWAY...CHATSWORTH...
ETON...RAMHURST...FORT MOUNTAIN STATE PARK...TAILS CREEK...ROUNDTOP
AND MOUNTAINTOWN. HEAVY DOWNPOURS WILL CAUSE PONDING OF WATER ON
ROADWAYS.

THESE WIND GUSTS MAY PRODUCE MINOR DAMAGE TO TREE LIMBS AND BLOW
LIGHT...UNSECURED OBJECTS AROUND.

SIGNIFICANT WEATHER ADVISORIES ARE ISSUED FOR WINDS UP TO 50 MPH...
HAIL LESS THAN THE SIZE OF QUARTERS...OR SIGNIFICANT CLOUD-TO-GROUND
LIGHTNING.

&&

LAT...LON 3477 8446 3457 8458 3471 8486 3472 8485
      3473 8487 3474 8486 3477 8487 3488 8479
TIME...MOT...LOC 2029Z 297DEG 11KT 3476 8475

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
440 PM EDT MON JUN 27 2011

GAZ066-078-272115-
440 PM EDT MON JUN 27 2011

...SIGNIFICANT WEATHER ADVISORY FOR DIME SIZED HAIL AND 40 MPH WINDS
IN TROUP AND HARRIS COUNTIES UNTIL 515 PM EDT...

AT 435 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED STRONG
THUNDERSTORMS FROM AROUND JONES CROSSROADS TO WEST OF PIEDMONT
HEIGHTS...MOVING SOUTHEAST AT 10 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE DIME SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT MOVES ACROSS
TROUP AND HARRIS COUNTIES THROUGH 515 PM EDT. SOME LOCATIONS IN THE
PATH OF THIS STORM INCLUDE CANNONVILLE...SMITHS CROSSROAD...LONG
CANE...PIEDMONT HEIGHTS...BAUGHS CROSSROADS...JONES CROSSROADS...WEST
POINT AND WHITESVILLE-PINE LAKE. HEAVY DOWNPOURS WILL CAUSE PONDING
OF WATER ON ROADWAYS.

THESE WIND GUSTS MAY PRODUCE MINOR DAMAGE TO TREE LIMBS AND BLOW
LIGHT...UNSECURED OBJECTS AROUND.

SIGNIFICANT WEATHER ADVISORIES ARE ISSUED FOR WINDS UP TO 50 MPH...
HAIL LESS THAN THE SIZE OF QUARTERS...OR SIGNIFICANT CLOUD-TO-GROUND
LIGHTNING.

&&

LAT...LON 3300 8522 3300 8498 3274 8488 3270 8512
      3273 8512 3275 8515 3278 8513 3281 8517
      3283 8517 3284 8516 3287 8519
TIME...MOT...LOC 2040Z 313DEG 8KT 3288 8508 3291 8523
          3295 8535