Alert archive / Georgia / Special Weather Statements in 2013

Special Weather Statement, NWS Atlanta, GA

August 30, 2013Catoosa County, Walker County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 30, 2013, 2:22 PM EDT for Catoosa County, Walker County, Georgia. It was in force for 23 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 30, 2013, 2:22 PM EDT (18:22 UTC)
Expired: Aug 30, 2013, 2:45 PM EDT
In force: 23 min
Issued by: NWS Atlanta, GA

Counties Catoosa County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 85 km from the middle of the area, began a volume at 18:26 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, 6.4 hours before the alert went out and 171 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: 2220 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 699 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

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 30, 7:39 AM EDT, 6 hours 43 minutes earlier.

Area forecast discussion, Aug 30, 7:39 AM EDT, 6 hours 43 minutes before

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Hazardous weather outlook, Aug 30, 5:27 AM EDT, 8 hours 55 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
527 AM EDT FRI AUG 30 2013

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-311200-
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-
527 AM EDT FRI AUG 30 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH AND CENTRAL GEORGIA.

.DAY ONE...TODAY AND TONIGHT...

A WEAK FRONTAL BOUNDARY WILL DROP SOUTH ACROSS MUCH OF GEORGIA
TODAY. THE FRONT IN COMBINATION WITH INCREASING LOW LEVEL MOISTURE
AND INSTABILITY WILL CREATE THE POTENTIAL FOR SCATTERED AFTERNOON
AND EVENING THUNDERSTORMS. SEVERE STORMS ARE NOT EXPECTED AT THIS
TIME. HOWEVER...STORMS WILL BE CAPABLE OF PRODUCING LOCALLY HEAVY
RAINFALL...GUSTY WINDS AND FREQUENT LIGHTNING STRIKES.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THE POTENTIAL FOR SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS
WILL CONTINUE INTO WEDNESDAY. STORMS ARE EXPECTED MAINLY IN THE
AFTERNOON AND EARLY EVENING HOURS. THUNDERSTORMS WILL BE CAPABLE
OF PRODUCING LOCALLY HEAVY RAINFALL...GUSTY WINDS AND FREQUENT
LIGHTNING STRIKES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT.

In the hours before

Special weather statement, Aug 30, 2:22 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
222 PM EDT FRI AUG 30 2013

GAZ001>003-301845-
222 PM EDT FRI AUG 30 2013

...SIGNIFICANT WEATHER ADVISORY FOR HEAVY RAIN IN WALKER...CATOOSA
AND DADE COUNTIES UNTIL 245 PM EDT...

AT 219 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS FROM INDIAN SPRINGS TO 8 MILES SOUTHWEST OF
CEDAR GROVE...MOVING SOUTHEAST AT 15 MPH.

THESE STORMS HAVE THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 35 MPH AS THEY MOVE
ACROSS WALKER...CATOOSA AND DADE COUNTIES THROUGH 245 PM EDT. SOME
LOCATIONS IN THE PATH OF THESE STORMS INCLUDE CEDAR GROVE...BLUE
SPRING...BOYNTON...INDIAN SPRINGS...GRAYSVILLE...FORT OGLETHORPE...
LAKEVIEW...ROCK SPRING...CHICKAMAUGA...NOBLE...BEAUMONT...LINWOOD...
WOOD STATION...RINGGOLD AND LAFAYETTE. HEAVY DOWNPOURS WILL CAUSE
PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3498 8498 3491 8502 3488 8501 3486 8506
      3482 8507 3482 8513 3473 8517 3472 8506
      3465 8505 3458 8520 3459 8553 3471 8556
      3481 8535 3499 8526
TIME...MOT...LOC 1822Z 294DEG 14KT 3495 8516 3477 8524
          3464 8552

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 8:19 PM EDT	Special Weather Statement	FFC	Wilkinson	41 min
Aug 29, 8:55 PM EDT	Special Weather Statement	FFC	Twiggs	50 min
Aug 29, 9:58 PM EDT	Special Weather Statement	FFC	Houston, Peach, Twiggs	47 min
Aug 30, 2:25 PM EDT	Special Weather Statement	FFC	Gilmer	35 min
Aug 30, 2:33 PM EDT	Special Weather Statement	FFC	Macon, Peach	27 min
Aug 30, 3:05 PM EDT	Special Weather Statement	FFC	Walker	25 min
Aug 30, 4:49 PM EDT	Special Weather Statement	FFC	Dooly, Houston	26 min
Aug 30, 5:19 PM EDT	Special Weather Statement	FFC	Crisp, Dooly, Pulaski	26 min

Nearby

Special Weather Statements in Georgia, 2013 Every special weather statement in 2013

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.