Alert archive / Georgia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 523, NWS Atlanta, GA

May 29, 1998Harris County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 29, 1998, 4:13 PM EDT for Harris County, Georgia. It was in force for 32 min. 2 reports 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: May 29, 1998, 4:13 PM EDT (20:13 UTC)
Expired: May 29, 1998, 4:45 PM EDT
In force: 32 min
Issued by: NWS Atlanta, GA
Area: Whole counties

County Harris County, GA

The radar

The Atlanta radar (KFFC), 77 km from the middle of the area, began a volume at 20:15 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.

What was reported inside it

Time	Report	Where	Remark
May 29, 4:15 PM EDT	Hail 0.75	Waverly Hall, GA
May 29, 4:25 PM EDT	Thunderstorm Wind	Waverly Hall, GA	The Waverly fire department reported dime size hail and 2 trees down.

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, 8.2 hours before the alert went out and 80 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: 1144 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 904 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 2 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.

796 
WUUS1 KATL 292012 RRA
SVRATL
GAC145-292045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
413 PM EDT FRI MAY 29 1998

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HARRIS COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 445 PM EDT

* AT 412 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  1 MILE NORTH OF WAVERLY HALL MOVING NORTH AT 5 MPH.


WHEN THUNDERSTORMS ARE OCCURRING...LIGHTNING POSES A SERIOUS
DANGER. STAY INDOORS AND AWAY FROM WINDOWS. DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES...UNLESS IN AN EMERGENCY. IF BOATING OR
SWIMMING...GET TO LAND QUICKLY AND FIND SHELTER. IF IN THE OPEN
FIND A LOW SPOT AWAY FROM TREES...FENCES...AND POLES. IF YOU
EXPERIENCE STORM DAMAGE TO STRUCTURES OR TREES...OR HAIL THE SIZE
OF DIMES OR LARGER...PLEASE REPORT IT TO THE NATIONAL WEATHER
SERVICE BY CALLING 770-486-8535.

17

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, May 29, 1:08 PM EDT, 3 hours 5 minutes before

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
091>098-103>113-DDHHMM-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
108 PM EDT FRI MAY 29 1998

SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EXTREME NORTH GEORGIA THIS
AFTERNOON AND EVENING.

A STATIONARY FRONT ACROSS THE CAROLINAS AND TENNESSEE WILL BE THE
FOCUS OF THUNDERSTORM DEVELOPMENT THIS AFTERNOON. A MODERATELY MOIST
AND UNSTABLE AIRMASS SOUTH OF THE FRONT WILL CONTINUE ACROSS THE
STATE AS A WEAK UPPER LEVEL DISTURBANCE MOVES ACROSS NORTH GEORGIA
THIS AFTERNOON AND EVENING.

SPOTTERS SHOULD REMAIN ALERT FOR POSSIBLE ACTIVATION LATER TODAY.
EMERGENCY MANAGERS SHOULD MONITOR THE SITUATION.

66

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 12:19 PM EDT	Severe Thunderstorm Warning	FFC	Harris	31 min
May 29, 2:28 PM EDT	Severe Thunderstorm Warning	FFC	Talbot, Taylor, Upson	32 min
May 29, 4:07 PM EDT	Severe Thunderstorm Warning	FFC	Coweta	33 min
May 29, 5:19 PM EDT	Severe Thunderstorm Warning	FFC	Fulton	36 min
May 29, 5:43 PM EDT	Severe Thunderstorm Warning	FFC	Jefferson	32 min
May 29, 6:28 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Rockdale	32 min
May 29, 6:49 PM EDT	Severe Thunderstorm Warning	FFC	Newton	36 min
May 29, 6:56 PM EDT	Severe Thunderstorm Warning	FFC	Dooly, Pulaski	34 min
May 29, 7:40 PM EDT	Severe Thunderstorm Warning	FFC	Pulaski	35 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1998 Every severe thunderstorm warning in 1998

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; radar from the NEXRAD Level II archive.