Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 17, NWS Atlanta, GA

January 18, 1999Jefferson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 18, 1999, 7:30 AM EST for Jefferson County, Georgia. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 18, 1999, 7:30 AM EST (12:30 UTC)
Expired: Jan 18, 1999, 8:05 AM EST
In force: 35 min
Issued by: NWS Atlanta, GA
Area: Whole counties

County Jefferson County, GA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 18, 5:15 AM EST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 0.5 hours before the alert went out and 197 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: 382 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 582 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

999 
WUUS1 KATL 181231 RRA
SVRATL
GAC163-181305-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
730 AM EST MON JAN 18 1999

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JEFFERSON COUNTY IN EAST CENTRAL GEORGIA

* UNTIL 805 AM EST

* AT 728 AM EST... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  9 MILES SOUTHWEST OF BARTOW... MOVING NORTHEAST AT 50 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE...
   BARTOW                      AROUND 735 AM EST
   WADLEY                      AROUND 740 AM EST
   LOUISVILLE                  AROUND 745 AM EST

DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND DEADLY LIGHTNING
ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. IF YOU SEE DAMAGE OR
LARGE HAIL...CALL THE NATIONAL WEATHER SERVICE AT 770.486.1133
EXTENSION 204.

$$ KDF/BDL

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jan 18, 7:10 AM EST, 20 minutes before

GAZ001>009-011>016-019>023-030>034-041>045-052-053-181230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
710 AM EST MON JAN 18 1999

THE SEVERE THUNDERSTORM WATCH FOR NORTH GEORGIA...NORTH AND WEST
OF A LINE FROM HEARD TO COWETA TO DEKALB TO GWINNETT TO HALL TO
WHITE AND TOWNS COUNTIES HAS BEEN CANCELED.

BDL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 17, 7:31 PM EST	Severe Thunderstorm Warning	FFC	Monroe	44 min
Jan 17, 8:16 PM EST	Severe Thunderstorm Warning	FFC	Laurens	49 min
Jan 17, 8:57 PM EST	Severe Thunderstorm Warning	FFC	Treutlen	33 min
Jan 17, 9:17 PM EST	Severe Thunderstorm Warning	FFC	Emanuel	48 min
Jan 18, 4:24 AM EST	Severe Thunderstorm Warning	FFC	Crisp	36 min
Jan 18, 4:43 AM EST	Severe Thunderstorm Warning	FFC	Floyd, Polk	47 min
Jan 18, 4:45 AM EST	Severe Thunderstorm Warning	FFC	Dodge, Pulaski	35 min
Jan 18, 5:04 AM EST	Severe Thunderstorm Warning	FFC	Laurens	51 min
Jan 18, 5:19 AM EST	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Gordon, Pickens	31 min
Jan 18, 5:24 AM EST	Severe Thunderstorm Warning	FFC	Wilcox	31 min
Jan 18, 5:36 AM EST	Severe Thunderstorm Warning	FFC	Johnson	34 min
Jan 18, 5:39 AM EST	Severe Thunderstorm Warning	FFC	Crisp, Wilcox	36 min
Jan 18, 5:56 AM EST	Severe Thunderstorm Warning	FFC	Jefferson	34 min
Jan 18, 6:00 AM EST	Severe Thunderstorm Warning	FFC	Pulaski	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; the sounding from the Mesonet's radiosonde archive.