Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Atlanta, GA

September 22, 2021Washington County, Georgia

NWS Atlanta, GA issued this special weather statement at Sep 22, 2021, 12:42 AM EDT for Washington County, Georgia. It was in force for 48 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
Sep 22, 2021, 12:42 AM EDT (04:42 UTC)
Expired
Sep 22, 2021, 1:30 AM EDT
In force
48 min
Issued by
NWS Atlanta, GA
Hail
0.00 in
Wind
30

County Washington County, GA

The radar

The Robins AFB radar (KJGX), 77 km from the middle of the area, began a volume at 04:46 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, 4.7 hours before the alert went out and 165 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 2021-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 400 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2021-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
400 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
928 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
16 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

941 
WWUS82 KFFC 220442
SPSFFC

Special Weather Statement
National Weather Service Peachtree City GA
1242 AM EDT Wed Sep 22 2021
 
GAZ074-220530-
Washington GA-
1242 AM EDT Wed Sep 22 2021

...A strong thunderstorm will impact portions of northeastern
Washington County through 130 AM EDT...

At 1241 AM EDT, a strong thunderstorm was near Agricola, or 10 miles
southwest of Gibson, moving northeast at 5 mph.

HAZARD...Heavy rain.

SOURCE...Radar indicated.

IMPACT...Heavy rain may cause temporary street flooding especially 
         in poor drainage areas.

Locations impacted include...
Hamburg State Park, Warthen and Downs. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should slow down and be prepared for possible loss of
control due to hydroplaning.

&&

LAT...LON 3297 8270 3309 8291 3320 8286 3320 8283
      3324 8278 3324 8275 3323 8274 3321 8273
      3320 8274 3318 8274 3317 8272 3314 8270
      3313 8266 3307 8263
TIME...MOT...LOC 0441Z 209DEG 5KT 3315 8276 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 8:24 PM EDTSpecial Weather StatementFFCHouston36 min
Sep 21, 9:41 PM EDTSpecial Weather StatementFFCWilkinson34 min
Sep 21, 10:16 PM EDTSpecial Weather StatementFFCWilkinson29 min

Nearby

Special Weather Statements in Georgia, 2021Every 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.