Alert archive / Georgia / Special Weather Statements in 2016

Special Weather Statement, NWS Atlanta, GA

August 4, 2016Forsyth County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 4, 2016, 6:06 AM 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
Aug 4, 2016, 6:06 AM EDT (10:06 UTC)
Expired
Aug 4, 2016, 6:30 AM EDT
In force
24 min
Issued by
NWS Atlanta, GA

County Forsyth County, GA

The radar

The Atlanta radar (KFFC), 104 km from the middle of the area, began a volume at 10:08 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, 10.1 hours before the alert went out and 100 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2016-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2016-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
5 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
1944 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-14 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.

787 
WWUS82 KFFC 041006
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
606 AM EDT THU AUG 4 2016
 
GAZ022-023-033-034-041030-
NORTH FULTON GA-GWINNETT GA-FORSYTH GA-HALL GA-
606 AM EDT THU AUG 4 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTH FULTON...NORTHERN
GWINNETT...FORSYTH AND SOUTHWESTERN HALL COUNTIES UNTIL 630 AM EDT...

AT 605 AM EDT...A NEARLY STATIONARY STORM WAS NEAR SUGAR HILL...OR
NEAR CUMMING.

  HAZARD...HEAVY RAINFALL OVER THE SAME AREAS. 

  IMPACT...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 THIS STORM INCLUDE
GAINESVILLE...CUMMING...JOHNS CREEK...ALPHARETTA...DULUTH...SUGAR
HILL... SUWANEE...BUFORD...BRASELTON...AUBURN...FLOWERY
BRANCH...OAKWOOD...BERKELEY LAKE...REST HAVEN...BUFORD DAM-LAKE
LANIER PARKS...AQUALAND PARK... CHESTATEE...DREW...LAKE LANIER
ISLANDS AND MATT.

LAT...LON 3433 8387 3404 8385 3403 8386 3396 8422
      3430 8425
TIME...MOT...LOC 1005Z 269DEG 8KT 3414 8406 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 9:12 PM EDTSpecial Weather StatementFFCWhite33 min
Aug 3, 11:18 PM EDTSpecial Weather StatementFFCHall27 min
Aug 4, 7:02 AM EDTSpecial Weather StatementFFCForsyth43 min
Aug 4, 1:52 PM EDTSpecial Weather StatementFFCPike38 min
Aug 4, 2:35 PM EDTSpecial Weather StatementFFCTalbot25 min
Aug 4, 3:09 PM EDTSpecial Weather StatementFFCGordon36 min
Aug 4, 3:11 PM EDTSpecial Weather StatementFFCTroup34 min
Aug 4, 3:55 PM EDTSpecial Weather StatementFFCBartow, Cherokee, Gilmer, Gordon, Pickens35 min
Aug 4, 4:20 PM EDTSpecial Weather StatementFFCPaulding25 min
Aug 4, 5:23 PM EDTSpecial Weather StatementFFCJohnson37 min
Aug 4, 6:12 PM EDTSpecial Weather StatementFFCHaralson33 min
Aug 4, 6:42 PM EDTSpecial Weather StatementFFCFulton33 min
Aug 4, 7:17 PM EDTSpecial Weather StatementFFCDeKalb28 min
Aug 4, 7:23 PM EDTSpecial Weather StatementFFCCarroll37 min

Nearby

Special Weather Statements in Georgia, 2016Every 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.