Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 119, NWS Tallahassee, FL

June 6, 1998Walton County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jun 6, 1998, 1:58 AM CDT for Walton County, Florida. It was in force for 57 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: Jun 6, 1998, 1:58 AM CDT (06:58 UTC)
Expired: Jun 6, 1998, 2:55 AM CDT
In force: 57 min
Issued by: NWS Tallahassee, FL
Area: Whole counties

County Walton County, FL

What was reported inside it

Time	Report	Where	Remark
Jun 6, 2:20 AM CDT	Thunderstorm Wind	Southwest Portion, FL	Trees and power lines down as well as debris across Florida Highway 20 near Eglin Air Force Base.

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
Jun 5, 11:15 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 7.0 hours before the alert went out and 181 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: 1543 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1378 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

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 Jun 5, 2:15 PM CDT, 11 hours 43 minutes earlier.

Area forecast discussion, Jun 5, 2:15 PM CDT, 11 hours 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
315 PM EDT FRI JUN 5 1998

MDLS GENERALLY CONSISTENT WITH ERODING REMAINDER OF FLAT UPR RDG
ACRS GULFMEX/GULF COAST STATES OVR NEXT 24 HRS. BY LATE SATURDAY
AND INTO SUNDAY...FLO BECOMES INCREASINGLY TROFFY OVR SERN STATES
AS NEW MID LVL CLOSED LOW TAKES SHAPE OVR GT LAKES. THIS SHOULD
ALLOW SFC BNDRY ANALYZED AT 18Z FM SRN AR TO ERN KY TO DROP DOWN
THRU CNTRL AL AND CNTRL GA BY SATURDAY EVENING...AND ACRS FCST AREA
BY SUNDAY MORNING. THE MAIN ACTION...THO...CONTINUES TO FIRE ALONG
OUTFLO BNDRYS WELL TO THE S OF SFC CDFNT.

MOST OF FCST AREA SHOULD REMAIN DRY THRU THIS EVENING. HOWEVER...
MCS CURRENTLY MOVG ACRS MS IS OF SOME CONCERN. VIS SATL IMAGERY
SHOWS WELL DEFINED OUTFLO BNDRY LEFT OVER FM MORNING CONVECTION
THAT HAS STALLED IN AN ARC FM CNTRL AL TO CNTRL GA. EXPC MCS TO
RACE EWD ACRS RMNDR OF MS AND INTO AL THRU THIS EVENING...
EVENTUALLY INTERACTING WITH OUTFLO BNDRY TO TRIGGER ADDITIONAL TSRA
IN PARTS OF SE AL AS EARLY AS LATE EVENING. THIS CNVTV ACTIVITY
WOULD THEN MOV ACRS SW GA DURG EARLY MORNING HOURS. WITH THIS
SCENARIO IN MIND...MIGHT WANT TO CONSIDER RAISING PRECIP CHC ACRS
SE AL/SW GA TONITE...WHILE MOST OF THIS ACTIVITY WOULD STAY OUT OF
FL THRU EARLY MORNING HOURS.

ETA BRINGS BEST UPR SUPPORT FOR DEEP CONVECTION ACRS FCST AREA ARND
12Z SATURDAY...SEEN AS VORT CNTR MOVG ALG NERN GULF COAST AND UPR
DIVERGENCE MAXIMA AT 250 MB OVR FCST AREA ASSOCD WITH RIGHT
ENTRANCE REGION OF STRONG UPR JET. CONSIDERING THIS FORCG AND
PREVIOUS OVERNITE SCENARIO...ENVISION ANOTHER OUTFLO BNDRY
REMAINING ALG N FL BORDER WHICH WOULD TRIGGER ADDITIONAL SHRA/TSRA
ACRS FL PART OF FCST AREA...POSSIBLY BEGINNING OVR PNHNDL BY 09Z
SATURDAY OR SO. THIS ACTIVITY WOULD BRING BEST SHOT AT PRECIP ACRS
FL PNHNDL AND BIG BEND THRU MORNING HOURS. AM IN FAVOR OF LIKELY
PRECIP CHC FOR THIS AREA...MAYBE BEGINNING ARND SUNRISE. MIGHT WANT
TO CONSIDER RAISING PRECIP CHC IN WRN FL BIG BEND BEFORE 12Z
SATURDAY.

WITH THIS IN MIND...AM IN FAVOR OF KEEPING TEMPS DOWN IN MID/UPR
80S ON SATURDAY DUE TO CLOUD COVER AND MORNING PRECIP. MDLS ALL MOV
SFC BNDRY S OF FCST AREA BY SUNDAY AFTERNOON...WHICH SHOULD BRING
SOME DRIER AIR IN BY LATE IN THE DAY...ALTHO SUN WILL STILL WARM
TEMPS UP INTO 85 TO 90 RANGE.

MOORE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 5, 7:23 PM CDT	Severe Thunderstorm Warning	TAE	Ben Hill, Berrien, Irwin	37 min
Jun 5, 7:23 PM CDT	Severe Thunderstorm Warning	TAE	Cook	37 min
Jun 5, 7:34 PM CDT	Severe Thunderstorm Warning	TAE	Lanier, Lowndes	46 min

Nearby

Severe Thunderstorm Warnings in Florida, 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.