Alert archive / Georgia / Special Weather Statements in 2020

Special Weather Statement, NWS Atlanta, GA

August 13, 2020Fulton County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 13, 2020, 9:16 PM EDT for Fulton County, Georgia. It was in force for 29 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 13, 2020, 9:16 PM EDT (01:16 UTC)
Expired: Aug 13, 2020, 9:45 PM EDT
In force: 29 min
Issued by: NWS Atlanta, GA
Hail: 0.75 in
Wind: 50

County Fulton County, GA

The radar

The Atlanta radar (KFFC), 36 km from the middle of the area, began a volume at 01:15 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

Nashville Metro, TN (KBNA), launched 00:00Z, 1.3 hours before the alert went out and 333 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: 340 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1003 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -41 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 13, 7:50 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, Aug 13, 7:50 PM EDT, 1 hour 26 minutes before

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Hazardous weather outlook, Aug 13, 12:03 PM EDT, 9 hours 13 minutes before

Hazardous Weather Outlook
National Weather Service Peachtree City GA
1203 PM EDT Thu Aug 13 2020

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-141615-
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-
1203 PM EDT Thu Aug 13 2020

This Hazardous Weather Outlook is for portions of North and Central Georgia.

.DAY ONE...This Afternoon and Tonight...

Numerous thunderstorms are expected across north and central
Georgia this afternoon into tonight. A few storms will be strong
to severe with strong to damaging winds, frequent lightning, small
hail, and locally heavy rainfall.

Heat indices of 97 to 103 can be expected over central and portions
or north Georgia this afternoon. Those outside for prolonged
periods should make sure to take precautions from the heat.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

Numerous to occasional thunderstorms are expected Friday and
Saturday, scattered thunderstorms are expected Sunday and Monday,
and scattered to numerous thunderstorms are expected Tuesday and
Wednesday. A few storms will be strong to severe each day, with
strong to damaging winds, frequent lightning, small hail, and
locally heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not requested but spotters are encouraged
to submit reports of severe weather through the web by going to
weather.gov/atlanta.  Please relay any information about observed severe
weather to the NWS while following all local, state, and CDC guidelines.

In the hours before

Special weather statement, Aug 13, 8:23 PM EDT, 53 minutes before

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Special weather statement, Aug 13, 8:30 PM EDT, 46 minutes before

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Special weather statement, Aug 13, 8:47 PM EDT, 29 minutes before

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Special weather statement, Aug 13, 8:51 PM EDT, 25 minutes before

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Special weather statement, Aug 13, 9:10 PM EDT, 6 minutes before

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Special weather statement, Aug 13, 9:16 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
916 PM EDT Thu Aug 13 2020

GAZ033-044-140145-
North Fulton GA-South Fulton GA-
916 PM EDT Thu Aug 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTH FULTON AND NORTHEASTERN
SOUTH FULTON COUNTIES UNTIL 945 PM EDT...

At 915 PM EDT...a strong thunderstorm with very heavy rain was
centered 5 miles west of College Park, or 8 miles southwest of
Atlanta. This storm was moving very slowly east.

  HAZARD...40 to 50 mph wind...up to penny sized hail...frequent
           cloud to ground 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 this storm include
Atlanta, East Point, College Park, Cascade Heights and Sandtown.

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 3373 8458 3376 8446 3369 8442 3364 8445
      3365 8446 3363 8446 3364 8457
TIME...MOT...LOC 0115Z 262DEG 3KT 3368 8452

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 8:23 PM EDT	Special Weather Statement	FFC	Gwinnett	22 min
Aug 13, 8:30 PM EDT	Special Weather Statement	FFC	Forsyth	30 min
Aug 13, 8:47 PM EDT	Special Weather Statement	FFC	Barrow	28 min
Aug 13, 8:51 PM EDT	Special Weather Statement	FFC	Oconee	24 min
Aug 13, 8:59 PM EDT	Flash Flood Warning	FFC	Oconee, Walton	2 hr
Aug 13, 9:10 PM EDT	Special Weather Statement	FFC	Wilkinson	35 min
Aug 13, 9:31 PM EDT	Special Weather Statement	FFC	Washington	29 min
Aug 13, 9:41 PM EDT	Special Weather Statement	FFC	Morgan	34 min
Aug 13, 11:04 PM EDT	Special Weather Statement	FFC	Jefferson	26 min
Aug 13, 11:05 PM EDT	Special Weather Statement	FFC	Pike	25 min
Aug 13, 11:22 PM EDT	River Flood Warning	FFC	DeKalb	2 hr
Aug 14, 3:09 PM EDT	Special Weather Statement	FFC	Twiggs	36 min

Nearby

Special Weather Statements in Georgia, 2020 Every special weather statement in 2020

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.