Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Atlanta, GA

March 1, 2012Jefferson County, Georgia

NWS Atlanta, GA issued this special weather statement at Mar 1, 2012, 10:16 AM EST for Jefferson 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: Mar 1, 2012, 10:16 AM EST (15:16 UTC)
Expired: Mar 1, 2012, 11:00 AM EST
In force: 44 min
Issued by: NWS Atlanta, GA

County Jefferson County, GA

The radar

The Robins AFB radar (KJGX), 97 km from the middle of the area, began a volume at 15:15 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 12:00Z, 3.3 hours before the alert went out and 211 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: 496 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 518 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

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 Mar 1, 7:00 AM EST, 3 hours 16 minutes earlier.

Area forecast discussion, Mar 1, 7:00 AM EST, 3 hours 16 minutes before

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Hazardous weather outlook, Mar 1, 5:35 AM EST, 4 hours 41 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
535 AM EST THU MAR 1 2012

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-021045-
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-
535 AM EST THU MAR 1 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH AND CENTRAL GEORGIA.

.DAY ONE...TODAY AND TONIGHT...
ISOLATED THUNDERSTORMS ARE EXPECTED ACROSS PORTIONS CENTRAL
GEORGIA TODAY SOUTH OF A LINE FROM NEWNAN TO MADISON TO
WASHINGTON. ISOLATED THUNDERSTORMS ARE ALSO EXPECTED IN NORTH
GEORGIA TONIGHT.

.SYNOPSIS...
A COLD FRONT IS EXPECTED TO MOVE INTO THE STATE THIS MORNING AND
THEN STALL OUT ACROSS CENTRAL GEORGIA TODAY...THEN MOVE NORTH AS A
WARM FRONT TONIGHT. THIS FRONT COULD CAUSE SHOWERS AND THUNDERSTORMS.

.PRIMARY HAZARDS...
THE PRIMARY HAZARDS WILL BE OCCASIONAL LIGHTNING...SMALL HAIL TO TO
THE SIZE OF NICKELS AND GUSTY WINDS TO 40 MPH...ESPECIALLY SOUTH
OF A LINE FROM CARROLTON TO MADISON TO WARRENTON TODAY AND NORTH
OF THIS LINE TONIGHT.

.DISCUSSION...
A COLD FRONT WILL PUSH INTO THE PEACH STATE TODAY. AHEAD OF THE COLD
FRONT A MOIST AND SOMEWHAT UNSTABLE ENVIRONMENT WILL EXIST.
PARAMETERS EXIST FOR STRONG THUNDERSTORMS WITH MUCAPE AROUND 500 J/KG
AND 0 TO 3 KM HELICITY VALUES AROUND 100 TO 200. THIS COLD FRONT
WILL THEN STALL OUT ACROSS CENTRAL GEORGIA AND SERVE AS THE FOCAL
POINT FOR SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING.
THE FRONT IS THEN EXPECTED TO HEAD NORTH AS A WARM FRONT TONIGHT
AND PROVIDE A SECOND ROUND OF SHOWERS AND THUNDERSTORMS FOR NORTH GEORGIA.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...
THUNDERSTORMS ARE POSSIBLE AGAIN ON FRIDAY MORNING THROUGH
SATURDAY EVENING ACROSS NORTH AND CENTRAL GEORGIA. SOME STORMS MAY
BE SEVERE FRIDAY AFTERNOON THROUGH SATURDAY MORNING. OTHERWISE NO
THUNDERSTORMS ARE EXPECTED SUNDAY THROUGH WEDNESDAY AT THIS TIME.

.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.

In the hours before

Special weather statement, Mar 1, 9:35 AM EST, 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
935 AM EST THU MAR 1 2012

GAZ074-084-011515-
935 AM EST THU MAR 1 2012

...SIGNIFICANT WEATHER ADVISORY FOR 45 MPH WINDS IN WASHINGTON AND
WILKINSON COUNTIES UNTIL 1015 AM EST...

AT 933 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS FROM AROUND DOWNS THROUGH NORTHWEST OF
TOOMSBORO...MOVING EAST AT 35 MPH.

WIND GUSTS OF 45 MPH ARE LIKELY AS THESE STORMS MOVE ACROSS
WASHINGTON AND WILKINSON COUNTIES THROUGH 1015 AM EST. SOME LOCATIONS
IN THE PATH OF THESE STORMS INCLUDE HEBRON...DOWNS...SANDERSVILLE...
TOOMSBORO...TENNILLE...DAVISBORO...OCONEE...RIDDLEVILLE AND HARRISON.

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

&&

LAT...LON 3285 8253 3279 8278 3281 8282 3276 8294
      3272 8309 3289 8322 3297 8311 3295 8307
      3300 8305 3311 8266 3298 8254 3294 8254
      3292 8251
TIME...MOT...LOC 1435Z 279DEG 31KT 3303 8262 3291 8292
          3287 8313

Special weather statement, Mar 1, 10:16 AM EST, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1016 AM EST THU MAR 1 2012

GAZ074-076-085-086-011600-
1016 AM EST THU MAR 1 2012

...SIGNIFICANT WEATHER ADVISORY FOR 45 MPH WINDS IN WASHINGTON...
JOHNSON...EMANUEL AND JEFFERSON COUNTIES UNTIL 1100 AM EST...

AT 1011 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS FROM NORTHEAST OF COLEMANS LAKE THROUGH
PRINGLE...MOVING EAST AT 30 MPH.

WIND GUSTS OF 45 MPH ARE LIKELY AS THESE STORMS MOVE ACROSS
WASHINGTON...JOHNSON...EMANUEL AND JEFFERSON COUNTIES THROUGH 1100 AM
EST. SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE MOXLEY...
BARTOW...WADLEY...PRINGLE...NEW HOME...KITE...BLUNDALE...COLEMANS
LAKE...THREE POINTS AND SUMMERTOWN.

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

&&

LAT...LON 3267 8252 3287 8275 3300 8232 3292 8227
      3284 8231 3281 8222 3282 8215 3281 8213
      3277 8212
TIME...MOT...LOC 1516Z 278DEG 26KT 3293 8217 3286 8253
          3283 8266

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 29, 7:35 PM EST	Special Weather Statement	FFC	Chattooga, Floyd	55 min
Feb 29, 7:42 PM EST	Severe Thunderstorm Warning	FFC	Chattooga, Floyd	33 min
Mar 1, 3:10 AM EST	Special Weather Statement	FFC	Coweta	35 min
Mar 1, 3:23 AM EST	Special Weather Statement	FFC	Fayette	37 min
Mar 1, 9:35 AM EST	Special Weather Statement	FFC	Washington	40 min
Mar 1, 1:47 PM EST	Special Weather Statement	FFC	Emanuel, Treutlen	28 min
Mar 1, 1:54 PM EST	Severe Thunderstorm Warning	FFC	Emanuel, Johnson, Laurens, Treutlen	51 min
Mar 1, 3:15 PM EST	Special Weather Statement	FFC	Chattahoochee, Marion, Schley	45 min
Mar 1, 4:14 PM EST	Special Weather Statement	FFC	Dooly, Macon	46 min
Mar 1, 5:09 PM EST	Special Weather Statement	FFC	Bleckley, Houston, Peach, Twiggs	36 min

Nearby

Special Weather Statements in Georgia, 2012 Every special weather statement in 2012

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.