Alert archive / Georgia / Special Weather Statements in 2011

Special Weather Statement, NWS Atlanta, GA

August 12, 2011Oglethorpe County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 12, 2011, 11:33 PM EDT for Oglethorpe County, Georgia. It was in force for 42 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: Aug 12, 2011, 11:33 PM EDT (03:33 UTC)
Expired: Aug 13, 2011, 12:15 AM EDT
In force: 42 min
Issued by: NWS Atlanta, GA

County Oglethorpe County, GA

The radar

The Greer radar (KGSP), 124 km from the middle of the area, began a volume at 03:36 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, 3.6 hours before the alert went out and 158 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: 1641 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1646 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 7 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.

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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 Aug 12, 9:57 PM EDT, 1 hour 36 minutes earlier.

Area forecast discussion, Aug 12, 9:57 PM EDT, 1 hour 36 minutes before

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Hazardous weather outlook, Aug 12, 5:00 PM EDT, 6 hours 33 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
500 PM EDT FRI AUG 12 2011

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-130945-
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-
500 PM EDT FRI AUG 12 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH AND CENTRAL GEORGIA.

.DAY ONE...TONIGHT
ISOLATED THUNDERSTORMS POSSIBLE ACROSS NORTH AND CENTRAL GEORGIA
THIS EVENING.

.SYNOPSIS...
WEAK FRONTAL BOUNDARY ACROSS NORTH GEORGIA WILL SINK SLOWLY SOUTH
THROUGH TONIGHT.

.PRIMARY HAZARDS...
THE PRIMARY HAZARDS WILL BE GUSTY WINDS AND FREQUENT CLOUD TO
GROUND LIGHTNING. THE BEST CHANCE FOR ISOLATED THUNDERSTORMS WILL BE
EARLY THIS EVENING ACROSS EAST CENTRAL AND NORTHEAST GEORGIA.

.DISCUSSION...
A WEAK FRONTAL BOUNDARY ALONG WITH A BROAD UPPER TROUGH AND A FEW
WEAK DISTURBANCES OVER THE REGION WILL HELP ISOLATED THUNDERSTORM
DEVELOPMENT THIS EVENING. DYNAMICS AND INSTABILITY INDICES ARE
WEAK SO ANY THUNDERSTORMS THAT DO DEVELOP SHOULD STAY BELOW SEVERE
LIMITS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED SATURDAY
THROUGH SUNDAY...AND AGAIN WEDNESDAY THROUGH THURSDAY. NO HAZARDOUS
WEATHER EXPECTED MONDAY THROUGH TUESDAY.

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

In the hours before

Special weather statement, Aug 12, 7:55 PM EDT, 3 hours 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
755 PM EDT FRI AUG 12 2011

GAZ037-130030-
755 PM EDT FRI AUG 12 2011

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 40 MPH WINDS
IN OCONEE COUNTY UNTIL 830 PM EDT...

AT 751 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER BISHOP THE THUNDERSTORM WAS NEARLY
STATIONARY.

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
OCONEE COUNTY THROUGH 830 PM EDT. SOME LOCATIONS IN THE PATH OF THIS
STORM INCLUDE EASTVILLE...NORTH HIGH SHOALS...ROSE HILL...BARNETT
SHOALS...FARMINGTON...BISHOP AND WATKINSVILLE. BRIEF HEAVY DOWNPOURS
WILL CAUSE PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3393 8342 3387 8336 3387 8334 3384 8328
      3382 8330 3379 8329 3371 8342 3372 8344
      3380 8349 3385 8357 3388 8359 3393 8350
TIME...MOT...LOC 2355Z 323DEG 1KT 3385 8346

16

Special weather statement, Aug 12, 8:00 PM EDT, 3 hours 33 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
800 PM EDT FRI AUG 12 2011

GAZ074-075-130030-
800 PM EDT FRI AUG 12 2011

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 40 MPH WINDS
IN WASHINGTON AND GLASCOCK COUNTIES UNTIL 830 PM EDT...

AT 757 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER MITCHELL. MOVEMENT WAS NEARLY
STATIONARY.

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
WASHINGTON AND GLASCOCK COUNTIES THROUGH 830 PM EDT. SOME LOCATIONS
IN THE PATH OF THIS STORM INCLUDE HAMBURG STATE PARK...AGRICOLA...
MITCHELL...GIBSON AND EDGEHILL. BRIEF HEAVY DOWNPOURS WILL CAUSE
PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3317 8259 3316 8257 3312 8258 3313 8266
      3312 8266 3311 8278 3322 8281 3324 8275
      3326 8275 3327 8269 3331 8264 3331 8262
      3318 8257
TIME...MOT...LOC 2359Z 350DEG 2KT 3319 8268

16

Special weather statement, Aug 12, 9:11 PM EDT, 2 hours 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
911 PM EDT FRI AUG 12 2011

GAZ049-130145-
911 PM EDT FRI AUG 12 2011

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 40 MPH WINDS
IN MORGAN COUNTY UNTIL 945 PM EDT...

AT 905 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER BUCKHEAD AND ANOTHER STRONG THUNDERSTORM
OVER RUTLEDGE. THE THUNDERSTORMS WERE NEARLY STATIONARY.

THESE STORMS HAVE THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS THEY CONTINUE
OVER MORGAN COUNTY THROUGH 945 PM EDT. BRIEF HEAVY DOWNPOURS WILL
CAUSE PONDING OF WATER ON ROADWAYS...INCLUDING INTERSTATE 20.

&&

LAT...LON 3353 8328 3349 8328 3348 8332 3351 8366
      3353 8368 3357 8368 3359 8369 3368 8362
      3370 8340 3365 8336 3360 8335 3354 8327
TIME...MOT...LOC 0108Z 263DEG 2KT 3357 8340

16

Special weather statement, Aug 12, 9:53 PM EDT, 1 hour 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
953 PM EDT FRI AUG 12 2011

GAZ024-025-027-130230-
953 PM EDT FRI AUG 12 2011

...SIGNIFICANT WEATHER ADVISORY FOR DIME SIZED HAIL AND 45 MPH WINDS
IN MADISON...BANKS AND JACKSON COUNTIES UNTIL 1030 PM EDT...

AT 951 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER ILA...MOVING EAST AT 10 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE DIME SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 45 MPH AS IT MOVES ACROSS
MADISON...BANKS AND JACKSON COUNTIES THROUGH 1030 PM EDT. SOME
LOCATIONS IN THE PATH OF THIS STORM INCLUDE FIVE POINTS...
NICHOLSON...POCATALIGO...ILA...HARRISON AND DANIELSVILLE. HEAVY
DOWNPOURS WILL CAUSE PONDING OF WATER ON ROADWAYS.

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 3425 8333 3427 8330 3425 8325 3425 8316
      3427 8313 3427 8312 3407 8314 3411 8346
      3429 8344 3429 8336
TIME...MOT...LOC 0153Z 275DEG 8KT 3419 8334

Special weather statement, Aug 12, 10:34 PM EDT, 59 minutes before

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Special weather statement, Aug 12, 11:33 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 8:00 PM EDT	Special Weather Statement	FFC	Glascock	30 min
Aug 12, 9:11 PM EDT	Special Weather Statement	FFC	Morgan	34 min
Aug 12, 9:53 PM EDT	Special Weather Statement	FFC	Madison	37 min
Aug 12, 10:34 PM EDT	Special Weather Statement	FFC	Oglethorpe	26 min
Aug 13, 1:18 PM EDT	Special Weather Statement	FFC	Warren	42 min
Aug 13, 2:59 PM EDT	Special Weather Statement	FFC	Houston	31 min
Aug 13, 4:06 PM EDT	Special Weather Statement	FFC	Twiggs	24 min
Aug 13, 4:19 PM EDT	Special Weather Statement	FFC	Troup	26 min
Aug 13, 4:30 PM EDT	Special Weather Statement	FFC	Bleckley	30 min
Aug 13, 4:38 PM EDT	Severe Thunderstorm Warning	FFC	Laurens	33 min
Aug 13, 4:59 PM EDT	Special Weather Statement	FFC	Wilkinson	31 min
Aug 13, 5:44 PM EDT	Special Weather Statement	FFC	Johnson	31 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.