Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Tallahassee, FL

July 20, 2021Thomas County, Georgia

NWS Tallahassee, FL issued this special weather statement at Jul 20, 2021, 1:41 PM EDT for Thomas County, Georgia. It was in force for 64 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 20, 2021, 1:41 PM EDT (17:41 UTC)
Expired: Jul 20, 2021, 2:45 PM EDT
In force: 64 min
Issued by: NWS Tallahassee, FL

County Thomas County, GA

The radar

The Tallahassee radar (KTLH), 41 km from the middle of the area, began a volume at 17:42 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.7 hours before the alert went out and 39 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: 1362 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 707 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

538 
WWUS82 KTAE 201741
SPSTAE

Special Weather Statement
National Weather Service Tallahassee FL
141 PM EDT Tue Jul 20 2021
 
FLZ017-018-GAZ157>159-201845-
Inland Jefferson FL-Leon FL-Brooks GA-Grady GA-Thomas GA-
141 PM EDT Tue Jul 20 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JEFFERSON...
NORTHEASTERN LEON...SOUTHEASTERN GRADY...THOMAS AND SOUTHWESTERN
BROOKS COUNTIES UNTIL 245 PM EDT...

At 141 PM EDT, Doppler radar was tracking a strong thunderstorm 13
miles northwest of Monticello, moving northeast at 20 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Monticello, Thomasville, Tallahassee, Boston, Ochlocknee, Alma,
Ralford Greenway, Dills, Thomasville Municipal A/P, Grooverville,
Dillon, Everett, Rocky Hill, Miccosukee, Iamonia, Chaires, Pisgah
Church, Lake Miccosukee, Fincher and Apalachee Regional Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3069 8362 3040 8416 3068 8430 3069 8429
      3069 8431 3071 8432 3104 8401
TIME...MOT...LOC 1741Z 225DEG 16KT 3064 8407 

$$

72-BUNKER

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 20, 3:44 PM EDT	Special Weather Statement	TAE	Jefferson	46 min
Jul 20, 5:02 PM EDT	Special Weather Statement	TAE	Madison	28 min
Jul 20, 2:15 PM EDT	Special Weather Statement	TAE	Grady, Mitchell	45 min
Jul 20, 2:22 PM EDT	Special Weather Statement	TAE	Baker, Calhoun, Dougherty, Early	68 min
Jul 20, 2:47 PM EDT	Special Weather Statement	TAE	Colquitt, Cook	58 min
Jul 20, 3:17 PM EDT	Special Weather Statement	TAE	Lanier, Lowndes	43 min
Jul 20, 11:58 AM EDT	Special Weather Statement	TAE	Coffee, Geneva	62 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.