Alert archive / Georgia / Special Weather Statements in 2017

Special Weather Statement, NWS Atlanta, GA

July 4, 20174 counties in Georgia

NWS Atlanta, GA issued this special weather statement at Jul 4, 2017, 3:21 PM EDT for 4 counties in Georgia. It was in force for 39 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 4, 2017, 3:21 PM EDT (19:21 UTC)
Expired
Jul 4, 2017, 4:00 PM EDT
In force
39 min
Issued by
NWS Atlanta, GA
Hail
0.75 in
Wind
50

Counties Cobb County, GA, Gwinnett County, GA, Paulding County, GA, Polk County, GA

The radar

The Atlanta radar (KFFC), 72 km from the middle of the area, began a volume at 19:24 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.

What was reported inside it

TimeReportWhereRemark
Jul 4, 3:30 PM EDTTSTM WND DMGDuluth, GAA LARGE TREE FELL ON AN OLDER HOME ON WEST LAWRENCEVILLE ST IN DULUTH. THE TREE CAUSED EXTENSIVE DAMAGE TO THE HOUSE AND THE FAMILY WILL BE DISPLACED DUE TO THE DAMAGE
Jul 4, 3:35 PM EDTTSTM WND DMGCarrefour Place, GAA LARGE TREE FELL ONTO A SECOND FLOOR ROOF AND INTO AN UPSTAIRS BEDROOM ALONG MILIEO PLACE IN LILBURN. AN ELECTRICAL SERVICE LINE WAS ALSO DOWN DUE TO THE DAMAGE.
Jul 4, 3:36 PM EDTTSTM WND DMGDuluth, GAA TREE FELL ON A HOUSE AT THE 3600 BLOCK OF WEST LAWRENCEVILLE STREET. NO INJURIES WERE REPORTED.
Jul 4, 3:40 PM EDTTSTM WND DMG1 W Deerwood, GAA TREE WAS BLOWN OVER AND DAMAGED THE FRONT PORCH OF A HOME ON WHITFIELD PLACE DRIVE IN SUWANEE
Jul 4, 3:40 PM EDTTSTM WND DMGFairview Station, GAA TREE FELL ON A HOUSE AND DAMAGED THE CHIMNEY CHASE ALONG OVERLOOK WOOD WAY IN LAWRENCEVILLE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.4 hours before the alert went out and 71 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 12:00Z on 2017-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 463 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 12:00Z on 2017-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.193958Sfc1 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
463 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
1063 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
21 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

385 
WWUS82 KFFC 041921
SPSFFC

Special Weather Statement
National Weather Service Peachtree City GA
321 PM EDT TUE JUL 4 2017
 
GAZ022-023-025-030>035-041-045-042000-
Hall GA-Jackson GA-Polk GA-North Fulton GA-Barrow GA-Cobb GA-
Haralson GA-DeKalb GA-Forsyth GA-Gwinnett GA-Paulding GA-
321 PM EDT TUE JUL 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN HALL...WESTERN
JACKSON...SOUTHEASTERN POLK...NORTH FULTON...WESTERN BARROW...COBB...
NORTHEASTERN HARALSON...NORTHWESTERN DEKALB...SOUTHERN FORSYTH...
GWINNETT AND PAULDING COUNTIES UNTIL 400 PM EDT...

At 320 PM EDT...a line of strong thunderstorms extending from near 
Cumming to Johns Creek, Dunwoody, Marietta and Cedartown, moving 
east at 30 mph.

  HAZARD...40 to 45 mph wind, pea sized hail, frequent lightning and 
           heavy rain. 

  IMPACT...Expect minor damage to tree limbs and blowing around of 
           light, unsecured objects. Heavy rain may cause temporary 
           street flooding especially in poor drainage areas. 

Some locations in the path of these storms include
Atlanta, Marietta, Lawrenceville, Dallas, Cumming, Sandy Springs,
Roswell, Johns Creek, Alpharetta, Smyrna, Dunwoody, Kennesaw, Duluth,
Acworth, Sugar Hill, Snellville, Suwanee, Powder Springs, Buford and
Lilburn.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3403 8518 3403 8458 3410 8431 3419 8428
      3420 8426 3419 8374 3397 8376 3383 8394
      3380 8429 3380 8489 3392 8527
TIME...MOT...LOC 1920Z 281DEG 26KT 3415 8415 3406 8416 3394 8432 3389
8481 3390 8508

HAIL...0.75IN
WIND...50MPH

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 8:32 PM EDTSpecial Weather StatementFFCCarroll28 min
Jul 4, 6:14 AM EDTSpecial Weather StatementFFCDade61 min
Jul 4, 7:25 AM EDTSpecial Weather StatementFFCCatoosa, Dade, Walker65 min
Jul 4, 8:51 AM EDTSpecial Weather StatementFFCCatoosa, Dade, Murray, Walker, Whitfield24 min
Jul 4, 9:22 AM EDTSpecial Weather StatementFFCCatoosa, Dade, Murray, Walker, Whitfield53 min
Jul 4, 10:23 AM EDTRiver Flood WarningFFCDade32 hr
Jul 4, 1:13 PM EDTSpecial Weather StatementFFCChattooga, Floyd, Gordon32 min
Jul 4, 1:39 PM EDTSpecial Weather StatementFFCFloyd, Gordon51 min
Jul 4, 2:13 PM EDTSpecial Weather StatementFFCBartow, Cherokee, Cobb, Gilmer, Gordon, Paulding and 2 more47 min
Jul 4, 2:51 PM EDTSpecial Weather StatementFFCCherokee, Cobb, Dawson, Forsyth, Hall, Paulding39 min
Jul 4, 3:30 PM EDTSpecial Weather StatementFFCHall, Lumpkin, White45 min
Jul 4, 3:49 PM EDTSpecial Weather StatementFFCBarrow, DeKalb, Douglas, Fulton, Gwinnett, Jackson and 2 more41 min
Jul 4, 3:53 PM EDTSpecial Weather StatementFFCHaralson, Polk37 min
Jul 4, 3:57 PM EDTSpecial Weather StatementFFCMadison33 min
Jul 4, 4:02 PM EDTSpecial Weather StatementFFCBanks43 min
Jul 4, 4:21 PM EDTSpecial Weather StatementFFCClarke, Madison, Oglethorpe39 min
Jul 4, 4:27 PM EDTSpecial Weather StatementFFCCarroll, Haralson, Paulding, Polk48 min
Jul 4, 4:52 PM EDTSevere Thunderstorm WarningFFCCobb, Douglas, Fulton, Paulding38 min
Jul 4, 4:59 PM EDTSpecial Weather StatementFFCCarroll, Heard31 min
Jul 4, 5:04 PM EDTSpecial Weather StatementFFCMorgan, Oglethorpe41 min
Jul 4, 5:28 PM EDTSpecial Weather StatementFFCClayton, Cobb, Coweta, DeKalb, Douglas, Fulton and 1 more47 min
Jul 4, 5:34 PM EDTSpecial Weather StatementFFCGreene, Taliaferro, Wilkes41 min
Jul 4, 6:05 PM EDTSpecial Weather StatementFFCButts, Clayton, Coweta, DeKalb, Fayette, Henry and 3 more40 min
Jul 4, 6:18 PM EDTSpecial Weather StatementFFCGlascock, Warren42 min
Jul 4, 6:40 PM EDTSpecial Weather StatementFFCButts, Jasper, Newton50 min
Jul 4, 6:57 PM EDTSpecial Weather StatementFFCGlascock48 min
Jul 4, 7:09 PM EDTSpecial Weather StatementFFCHeard36 min
Jul 4, 7:15 PM EDTSpecial Weather StatementFFCBaldwin, Putnam45 min
Jul 4, 7:39 PM EDTSevere Thunderstorm WarningFFCBaldwin, Hancock, Putnam36 min
Jul 4, 7:51 PM EDTSpecial Weather StatementFFCWhitfield39 min
Jul 4, 7:55 PM EDTSpecial Weather StatementFFCGreene, Taliaferro35 min

Nearby

Special Weather Statements in Georgia, 2017Every special weather statement in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.