Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 486, NWS Atlanta, GA

July 16, 1999Crawford County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 16, 1999, 6:34 PM EDT for Crawford County, Georgia. It was in force for 31 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 16, 1999, 6:34 PM EDT (22:34 UTC)
Expired: Jul 16, 1999, 7:05 PM EDT
In force: 31 min
Issued by: NWS Atlanta, GA
Area: Whole counties

County Crawford County, GA

What was reported inside it

Time	Report	Where	Remark
Jul 16, 6:45 PM EDT	Thunderstorm Wind	Knoxville, GA	Flint EMC reported trees down on power lines at Sandy Point.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.6 hours before the alert went out and 87 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: 355 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KATL 162233 RRA
SVRATL
GAC079-162305-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
634 PM EDT FRI JUL 16 1999

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CRAWFORD COUNTY IN CENTRAL GEORGIA

* UNTIL 705 PM EDT

* AT 630 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  5 MILES NORTHEAST OF KNOXVILLE... MOVING WEST AT 5 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM ARE...

  ROBERTA.

THIS THUNDERSTORM IS PRODUCING VERY HEAVY RAIN THAT MAY FLOOD
ROADS QUICKLY. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
IF YOU SEE FLOODING...LARGE HAIL OR WIND DAMAGE...CALL THE
NATIONAL WEATHER SERVICE AT 770-486-1133 AT EXTENSION 2 0 4.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 3:10 PM EDT	Severe Thunderstorm Warning	FFC	Laurens	35 min
Jul 16, 4:00 PM EDT	Severe Thunderstorm Warning	FFC	Washington	35 min
Jul 16, 5:04 PM EDT	Severe Thunderstorm Warning	FFC	Wilkinson	36 min
Jul 16, 6:22 PM EDT	Severe Thunderstorm Warning	FFC	Bibb	33 min
Jul 16, 7:50 PM EDT	Severe Thunderstorm Warning	FFC	Schley	35 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.