Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 34, NWS Tallahassee, FL

May 6, 1999Turner County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at May 6, 1999, 3:18 PM EDT for Turner County, Georgia. It was in force for 32 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: May 6, 1999, 3:18 PM EDT (19:18 UTC)
Expired: May 6, 1999, 3:50 PM EDT
In force: 32 min
Issued by: NWS Tallahassee, FL
Area: Whole counties

County Turner County, GA

What was reported inside it

Time	Report	Where	Remark
May 6, 3:30 PM EDT	Hail 1.75	Dakota, GA	Golfball size hail reported by Turner County EMA.

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 watch it was issued in

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

Issued	Product	Office	Lasted
May 6, 12:00 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.3 hours before the alert went out and 160 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: 1006 J/kg
Mixed-layer CIN: -208 J/kg
Mixed-layer LCL: 994 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

NWS Tallahassee, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at May 6, 2:22 PM EDT, 56 minutes earlier.

Area forecast discussion, May 6, 2:22 PM EDT, 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
222 PM EDT THU MAY 6 1999

                         ...LARGE SCALE...
12 UTC MODEL RUNS GRADUALLY WEAKEN 500MB LOW ACROSS GREAT LAKES
STATES NEXT 42 HOURS AS FLOW ACROSS SOUTHERN U.S. BECOMES MORE
ZONAL. SURFACE FRONT FROM NEW TO MEM HAS QUASI STALLED...AND SO HAS
THE ACCOMPANYING SQUALL LINE.

                         ...OUR AREA...
SO FAR EVERY MODEL RUN (INCLUDING EACH RUC) HAS BEEN SLOWER AND
SLOWER WITH APPROACHING FRONT/PRECIP. NOW NGM/ETA/15 UTC RUC
COMPLETELY STALL THE FRONT BY SAT MORNING...WITH THE NGM THE
FARTHEST EAST (FROM PAM TO MCN). ETA SHOWS FRONT STALLING FROM MOB
TO ATL...AND IS MORE BELIEVABLE BECAUSE OF ITS BETTER TRACK RECORD
WITH THIS SYSTEM. THIS SHOULD KEEP POPS UP ABOVE CLIMATOLOGY
THROUGH SATURDAY.

IN THE SHORTER TERM...BIG QUESTION IS WHETHER OR NOT THE MAIN
SQUALL LINE WILL MAKE IT TO FL/GA. 15 UTC RUC FORECASTS NO MOTION
THROUGH 03 UTC...AND NGM/ETA SHOW THE LINE DISSIPATING DURING THE
NIGHT WITH NO REAL MOTION. TEND TO BELIEVE A COMPROMISE OF THE
MODELS HERE...AS THERE SEEMS TO BE NO REASON FOR THE LINE TO MOVE.
HOWEVER...IT WILL STILL BE POSSIBLE FOR SCATTERED CONVECTION TO
DEVELOP OUT AHEAD OF THIS LINE...SO THE WFO DECISIONS TO KEEP
CHANCE POPS IN TONIGHTS FORECAST SEEMS WISE. FRIDAY ZONES/CWF LOOK
FINE.

...PRELIMINARY NUMBERS...
TLH  69  86  66  88  4534
PFN  72  80  68  82  5534
DHN  64  82  64  84  6644
ABY  67  85  64  87  5534
VLD  67  88  64  88  4534

FOURNIER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 6:56 PM EDT	Tornado Warning	TAE	Mitchell	34 min
May 6, 7:32 PM EDT	Tornado Warning	TAE	Colquitt, Worth	33 min
May 6, 1:55 PM EDT	Tornado Warning	TAE	Henry	30 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.