Alert archive / Georgia / Special Weather Statements in 2016

Special Weather Statement, NWS Atlanta, GA

July 21, 2016Forsyth County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 21, 2016, 4:21 PM EDT for Forsyth County, Georgia. It was in force for 24 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 21, 2016, 4:21 PM EDT (20:21 UTC)
Expired: Jul 21, 2016, 4:45 PM EDT
In force: 24 min
Issued by: NWS Atlanta, GA

County Forsyth County, GA

The radar

The Atlanta radar (KFFC), 92 km from the middle of the area, began a volume at 20:23 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, 8.4 hours before the alert went out and 89 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: 1259 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1185 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

411 
WWUS82 KFFC 212021
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
421 PM EDT THU JUL 21 2016
 
GAZ021-022-033-034-212045-
NORTH FULTON GA-GWINNETT GA-CHEROKEE GA-FORSYTH GA-
421 PM EDT THU JUL 21 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTH FULTON...NORTHWESTERN
GWINNETT...SOUTHEASTERN CHEROKEE AND SOUTHWESTERN FORSYTH COUNTIES
UNTIL 445 PM EDT...

AT 421 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM NEAR CUMMING TO NEAR ALPHARETTA...AND MOVING SOUTHEAST
AT 25 MPH.

  HAZARD...40 TO 50 MPH WIND...UP TO PENNY SIZED HAIL...FREQUENT 
           CLOUD TO GROUND LIGHTNING AND HEAVY RAIN. 

  IMPACT...PEOPLE OUTDOORS SHOULD SEEK SHELTER IMMEDIATELY. EXPECT 
           MINOR DAMAGE TO TREE LIMBS AND BLOWING AROUND OF 
           LIGHT...UNSECURED OBJECTS. LIGHTNING IS ONE OF NATURE'S 
           LEADING KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU 
           ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. ELECTRICAL 
           APPLIANCES SHOULD NOT BE USED UNLESS IN AN EMERGENCY. 
           MOTORISTS SHOULD SLOW DOWN AND BE PREPARED FOR POSSIBLE 
           LOSS OF CONTROL DUE TO HYDROPLANING. ALSO...THE HEAVY 
           RAIN MAY CAUSE TEMPORARY STREET FLOODING OR ROAD PONDING 
           IN SLOW DRAINAGE AREAS. WHEN WATER COVERS THE 
           ROAD...REMEMBER TO TURN AROUND DON'T DROWN. 

SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE
CUMMING...SANDY SPRINGS...ROSWELL...JOHNS CREEK...ALPHARETTA...MILTON...
DULUTH...SUGAR HILL...SUWANEE...BUFORD...BERKELEY LAKE...MOUNTAIN PARK...
BUFORD DAM-LAKE LANIER PARKS...HICKORY FLAT...BROOKWOOD AND BIRMINGHAM.

LAT...LON 3418 8406 3417 8406 3416 8402 3411 8396
      3397 8411 3399 8438 3400 8439 3418 8443
      3419 8425 3424 8414
TIME...MOT...LOC 2021Z 328DEG 22KT 3416 8411 3410 8432 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 9:30 PM EDT	Special Weather Statement	FFC	Taliaferro	30 min
Jul 20, 9:43 PM EDT	Special Weather Statement	FFC	DeKalb	32 min
Jul 20, 10:19 PM EDT	Special Weather Statement	FFC	DeKalb	26 min
Jul 20, 10:34 PM EDT	Special Weather Statement	FFC	Taliaferro	56 min
Jul 20, 10:51 PM EDT	Flash Flood Warning	FFC	Taliaferro, Wilkes	6 hr
Jul 20, 11:22 PM EDT	Special Weather Statement	FFC	Wilkes	23 min
Jul 20, 11:43 PM EDT	Special Weather Statement	FFC	Wilkes	32 min
Jul 21, 1:59 PM EDT	Special Weather Statement	FFC	Coweta	31 min
Jul 21, 2:03 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Coweta, Heard	42 min
Jul 21, 2:08 PM EDT	Severe Thunderstorm Warning	FFC	Bibb, Crawford, Houston, Peach	31 min
Jul 21, 2:18 PM EDT	Special Weather Statement	FFC	Lumpkin, White	42 min
Jul 21, 2:41 PM EDT	Special Weather Statement	FFC	Wilkes	34 min
Jul 21, 2:51 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Fannin, Gilmer, Lumpkin, Pickens, Union	39 min
Jul 21, 2:51 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Douglas, Fulton	39 min
Jul 21, 3:02 PM EDT	Severe Thunderstorm Warning	FFC	Greene, Oglethorpe, Taliaferro, Wilkes	43 min
Jul 21, 3:04 PM EDT	Severe Thunderstorm Warning	FFC	Wilkes	41 min
Jul 21, 3:32 PM EDT	Special Weather Statement	FFC	Douglas	28 min
Jul 21, 3:36 PM EDT	Special Weather Statement	FFC	Dawson	54 min
Jul 21, 3:39 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Forsyth, Pickens	51 min
Jul 21, 3:40 PM EDT	Special Weather Statement	FFC	Bartow	35 min
Jul 21, 3:44 PM EDT	Severe Thunderstorm Warning	FFC	Taliaferro, Warren, Wilkes	46 min
Jul 21, 3:59 PM EDT	Special Weather Statement	FFC	Gwinnett	31 min
Jul 21, 4:03 PM EDT	Severe Thunderstorm Warning	FFC	Gwinnett, Walton	42 min
Jul 21, 4:09 PM EDT	Special Weather Statement	FFC	Clarke	36 min
Jul 21, 4:26 PM EDT	Special Weather Statement	FFC	Bartow	34 min
Jul 21, 4:28 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Fulton, Gwinnett	47 min
Jul 21, 4:34 PM EDT	Severe Thunderstorm Warning	FFC	Gilmer, Gordon, Murray, Pickens	41 min
Jul 21, 4:38 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Paulding, Polk	52 min
Jul 21, 4:41 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Fulton	49 min
Jul 21, 4:43 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Muscogee	47 min
Jul 21, 4:49 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, Henry, Spalding	41 min
Jul 21, 5:04 PM EDT	Special Weather Statement	FFC	Newton, Rockdale	26 min
Jul 21, 5:10 PM EDT	Special Weather Statement	FFC	Bibb, Twiggs	35 min
Jul 21, 5:12 PM EDT	Special Weather Statement	FFC	Dodge	33 min
Jul 21, 5:14 PM EDT	Special Weather Statement	FFC	Stewart	31 min
Jul 21, 5:18 PM EDT	Special Weather Statement	FFC	Floyd	27 min
Jul 21, 5:21 PM EDT	Special Weather Statement	FFC	Bleckley	24 min
Jul 21, 5:32 PM EDT	Special Weather Statement	FFC	DeKalb, Gwinnett	58 min
Jul 21, 5:35 PM EDT	Severe Thunderstorm Warning	FFC	Houston, Peach	40 min
Jul 21, 5:36 PM EDT	Special Weather Statement	FFC	Henry	24 min
Jul 21, 5:45 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Harris, Marion, Muscogee, Talbot	45 min
Jul 21, 5:50 PM EDT	Special Weather Statement	FFC	Twiggs	25 min
Jul 21, 5:50 PM EDT	Severe Thunderstorm Warning	FFC	Morgan, Newton, Walton	40 min
Jul 21, 5:58 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Jackson, Oconee, Walton	47 min
Jul 21, 6:11 PM EDT	Special Weather Statement	FFC	Chattahoochee, Muscogee	34 min
Jul 21, 6:14 PM EDT	Special Weather Statement	FFC	Pulaski	31 min
Jul 21, 6:24 PM EDT	Special Weather Statement	FFC	Laurens	36 min
Jul 21, 6:26 PM EDT	Special Weather Statement	FFC	Montgomery, Treutlen	34 min
Jul 21, 6:32 PM EDT	Special Weather Statement	FFC	Marion, Schley, Taylor	28 min
Jul 21, 6:38 PM EDT	Special Weather Statement	FFC	Bibb	52 min
Jul 21, 6:45 PM EDT	Severe Thunderstorm Warning	FFC	Jasper, Jones	45 min
Jul 21, 7:18 PM EDT	Special Weather Statement	FFC	Johnson	27 min

Nearby

Special Weather Statements in Georgia, 2016 Every special weather statement in 2016

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.