Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Atlanta, GA

July 17, 2021Madison County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 17, 2021, 8:04 PM EDT for Madison County, Georgia. It was in force for 26 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 17, 2021, 8:04 PM EDT (00:04 UTC)
Expired: Jul 17, 2021, 8:30 PM EDT
In force: 26 min
Issued by: NWS Atlanta, GA
Wind: 40

County Madison County, GA

The radar

The Greer radar (KGSP), 113 km from the middle of the area, began a volume at 00:06 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, 0.1 hours before the alert went out and 156 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: 849 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1169 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

583 
WWUS82 KFFC 180004
SPSFFC

Special Weather Statement
National Weather Service Peachtree City GA
804 PM EDT Sat Jul 17 2021
 
GAZ027-180030-
Madison GA-
804 PM EDT Sat Jul 17 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MADISON COUNTY UNTIL
830 PM EDT...

At 803 PM EDT...a strong thunderstorm was near Danielsville...moving 
northeast at 15 mph.

  HAZARD...Up to 40 mph wind...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.

This storm will remain over mainly rural areas of northeastern
Madison County.

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 3426 8312 3423 8308 3421 8309 3417 8310
      3415 8308 3416 8307 3413 8305 3409 8317
      3424 8327 3425 8326 3424 8324 3425 8324
      3425 8320 3424 8317 3427 8311
TIME...MOT...LOC 0003Z 241DEG 12KT 3420 8315 

WIND...40MPH

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 8:30 PM EDT	Special Weather Statement	FFC	Toombs	30 min
Jul 17, 8:52 PM EDT	Special Weather Statement	FFC	Toombs	23 min
Jul 18, 11:15 AM EDT	Special Weather Statement	FFC	Emanuel	30 min
Jul 18, 11:20 AM EDT	Severe Thunderstorm Warning	FFC	Emanuel	25 min
Jul 18, 5:00 PM EDT	Special Weather Statement	FFC	Emanuel	30 min
Jul 18, 5:04 PM EDT	Special Weather Statement	FFC	Dodge	26 min
Jul 18, 5:10 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Wilcox	50 min
Jul 18, 5:34 PM EDT	Special Weather Statement	FFC	Toombs	26 min

Nearby

Special Weather Statements in Georgia, 2021 Every special weather statement in 2021

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.