Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 41, NWS Tallahassee, FL

May 13, 1999Early County, Georgia; Houston County, Alabama

NWS Tallahassee, FL issued this severe thunderstorm warning at May 13, 1999, 5:10 PM EDT for Early County, Georgia; Houston County, Alabama. It was in force for 50 min. 3 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 13, 1999, 5:10 PM EDT (21:10 UTC)
Expired: May 13, 1999, 6:00 PM EDT
In force: 50 min
Issued by: NWS Tallahassee, FL
Area: Whole counties

Counties Houston County, AL, Early County, GA

What was reported inside it

Time	Report	Where	Remark
May 13, 5:10 PM EDT	Hail 0.75	Ashford, AL	Dime size hail reported by Houston County EMA.
May 13, 5:15 PM EDT	Thunderstorm Wind	Ashford, AL	Downed trees reported by Houston County EMA.
May 13, 5:45 PM EDT	Thunderstorm Wind	Blakely, GA	Downed trees reported by Early 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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.2 hours before the alert went out and 121 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: 101 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 974 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 80 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 13, 2:00 PM EDT, 3 hours 10 minutes earlier.

Area forecast discussion, May 13, 2:00 PM EDT, 3 hours 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
200 PM EDT THU MAY 13 1999

IN THE SHORT TERM...SCATTERED CONVECTION IS EXPECTED THROUGH THE
AFTERNOON AND INTO THIS EVENING. STORM CLUSTER OVER GULF (SOUTH OF
PANAMA CITY) HAS WEAKENED & WILL MOVE E-SE & GENERALLY STAY OFF
SHORE. WITH GRADIENT LEVEL FLOW MORE WESTERLY & STRONGER
TODAY...SEA BREEZE WILL RUN AHEAD OF SHORTWAVE ENERGY FROM NORTHERN
SYSTEM...& NOT BE MUCH OF A FACTOR. BUT SHORTWAVE ENERGY WILL SWING
THROUGH CWA TOWARD EVENING & OVERNIGHT & SHOULD HELP GENERATE
CONVECTION. AS AFTERNOON PROGRESSES...ADDITIONAL DESTABALIZATION
WILL OCCUR...WITH MAIN THREAT OVER CWA OF SOME PULSE STORMS.
PRECIPITABLE WATER VALUES ARE GENERALLY ABOVE 1.20 INCHES...& SOME
LOCALIZED HEAVY RAIN IS EXPECTED. OVERALL SEVERE POTENTIAL SHOULD
STAY LOW.

MODELS ARE GENERALLY CONSISTENT WITH MOVING SHORTWAVE EAST OF CWA
BY FRI NOON...AS PREFRONTAL TROUGH DRIFTS THROUGH TONIGHT...THEN
WEAK COLD FRONT FRI AM. SHOULD BE SOME SCATTERED CONVECTION...BUT
MOST OF DYNAMICS STAY NORTH. AS WINDS SHIFT TO W-NW...DRYING TREND
SEEN FRIDAY AFTERNOON & INTO WEEKEND. ETAS DEPICTION OF PRECIP
FIELDS ARE HIT & MISS PER SCATTERED AFFECT.

FOR TEMPS...COOLER FAN LOOKS BETTER.

TLH 61 84 58 84 532-
PFN 65 81 62 82 432-
DHN 65 84 60 83 543-
ABY 62 83 60 82 5432
VLD 62 85 61 84 5432

MCT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 4:58 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson	32 min
May 13, 7:27 PM EDT	Severe Thunderstorm Warning	TAE	Holmes	33 min
May 13, 6:10 PM EDT	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Dougherty	30 min
May 13, 6:54 PM EDT	Severe Thunderstorm Warning	TAE	Dougherty, Worth	31 min
May 13, 6:54 PM EDT	Severe Thunderstorm Warning	TAE	Turner	31 min
May 13, 7:22 PM EDT	Severe Thunderstorm Warning	TAE	Clay, Randolph	43 min
May 13, 7:22 PM EDT	Severe Thunderstorm Warning	TAE	Lee, Terrell	43 min
May 13, 4:16 PM EDT	Severe Thunderstorm Warning	TAE	Coffee	29 min
May 13, 4:43 PM EDT	Severe Thunderstorm Warning	TAE	Houston	32 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1999 Severe Thunderstorm Warnings in Alabama, 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.