Alert archive / Georgia / Special Weather Statements in 2015

Special Weather Statement, NWS Atlanta, GA

July 29, 2015Walker County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 29, 2015, 3:08 PM EDT for Walker County, Georgia. It was in force for 37 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: Jul 29, 2015, 3:08 PM EDT (19:08 UTC)
Expired: Jul 29, 2015, 3:45 PM EDT
In force: 37 min
Issued by: NWS Atlanta, GA

County Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 74 km from the middle of the area, began a volume at 19:11 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, 7.1 hours before the alert went out and 163 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: 31 J/kg
Mixed-layer CIN: -184 J/kg
Mixed-layer LCL: 1570 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -45 m²/s²
0-3 km storm-relative helicity: -20 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.

341 
WWUS82 KFFC 291908
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
308 PM EDT WED JUL 29 2015
 
GAZ002-291945-
WALKER GA-
308 PM EDT WED JUL 29 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN WALKER COUNTY UNTIL 345
PM EDT...

AT 307 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR LA FAYETTE...OR NEAR LAFAYETTE...MOVING
SOUTH AT 10 MPH.

  HAZARD...40 TO 50 MPH WIND AND HEAVY RAIN. 

  IMPACT...PEOPLE OUTDOORS SHOULD SEEK SHELTER IMMEDIATELY. EXPECT 
           MINOR DAMAGE TO TREE LIMBS AND BLOWING AROUND OF 
           LIGHT...UNSECURED OBJECTS. LOCALIZED FLOODING IN LOW 
           LYING AND POOR DRAINAGE AREAS IS ALSO LIKELY. MOTORISTS 
           SHOULD SLOW DOWN AND BE PREPARED FOR POSSIBLE LOSS OF 
           CONTROL DUE TO HYDROPLANING. WHEN WATER COVERS THE 
           ROAD...REMEMBER TO TURN AROUND DON'T DROWN. 

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
LAFAYETTE...LA FAYETTE...NOBLE...NAOMI...COOPER HEIGHTS...CENTER
POST...ROCK SPRING...SUTTLES MILL AND LINWOOD.

LAT...LON 3482 8543 3485 8526 3463 8511 3459 8531
      3459 8535 3458 8535 3458 8537 3459 8537
      3459 8543
TIME...MOT...LOC 1907Z 346DEG 10KT 3478 8533 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 8:10 PM EDT	Special Weather Statement	FFC	Gwinnett	35 min
Jul 29, 2:17 AM EDT	Heat Advisory	FFC	Bibb, Bleckley, Chattahoochee, Crawford, Crisp, Dodge and 23 more	18 hr
Jul 29, 1:48 PM EDT	Special Weather Statement	FFC	Bibb	27 min
Jul 29, 2:56 PM EDT	Special Weather Statement	FFC	Bleckley, Wilkinson	34 min
Jul 29, 4:54 PM EDT	Special Weather Statement	FFC	Washington	36 min
Jul 29, 5:23 PM EDT	Special Weather Statement	FFC	Madison	37 min
Jul 29, 6:26 PM EDT	Special Weather Statement	FFC	Upson	34 min
Jul 29, 7:58 PM EDT	Special Weather Statement	FFC	Walker	32 min

Nearby

Special Weather Statements in Georgia, 2015 Every special weather statement in 2015

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.