Alert archive / Florida / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 19, NWS Tampa Bay, FL

June 18, 2000Sarasota County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 18, 2000, 5:10 PM EDT for Sarasota County, Florida. 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: Jun 18, 2000, 5:10 PM EDT (21:10 UTC)
Expired: Jun 18, 2000, 5:45 PM EDT
In force: 35 min
Issued by: NWS Tampa Bay, FL
Area: Whole counties

County Sarasota County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 9.2 hours before the alert went out and 58 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: 672 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 860 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -49 m²/s²
0-3 km storm-relative helicity: -5 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.

534 
WUUS52 KTBW 182112
SVRTBW
FLC115-182145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
510 PM EDT SUN JUN 18 2000

THE NATIONAL WEATHER SERVICE IN RUSKIN FLORIDA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN SARASOTA COUNTY.

* UNTIL 545 PM EDT

* AT 505 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS...OVER
  CENTRAL SARASOTA COUNTY...MOVING NORTHWEST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  MYAKKA RIVER STATE PARK.
  FRUITVILLE.

SEVERE THUNDERSTORMS CONTAIN WIND GUSTS OF 60 MPH OR HIGHER...AND
LARGE HAIL THE SIZE OF DIMES OR LARGER. MOVE TO A PLACE OF SAFETY.

QUARTER SIZE HAIL IS LIKELY. MOVE INDOORS IMMEDIATELY.

$$

LAT...LON 2718 8242 2721 8225 2738 8230 2735 8250

33
NNNN

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 Tampa Bay, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 18, 1:47 PM EDT, 3 hours 23 minutes earlier.

Area forecast discussion, Jun 18, 1:47 PM EDT, 3 hours 23 minutes before

WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
147 PM EDT SUN JUN 18 2000

EARLY SUMMER PATTERN IN FULL SWING ACROSS THE REGION.  THE DEVIL IS
IN THE DETAILS...BUT WILL KEEP THE FCST BROAD-BRUSHED AFTER THE
FIRST PERIOD DUE TO MODEL DIFFICULTIES IN HANDLING MESO FEATURES.

SYNOPTICALLY...THROUGH 60H...H50 RIDGE WILL HOLD FORTH.  DISTURBANCE
AFFECTING THE CENTRAL BAHAMAS TODAY WILL SHEAR OUT AS IT SLIDES
ACROSS THE FL STRAITS DURING THE NEXT 48H...AND IN THE END WILL
LIKELY HAVE LITTLE DIRECT IMPACT ON OUR WX.

AS FAR AS THE MODELS GO...ONLY THE AVN MAINTAINS PERSISTENT LOW
LEVEL E FLOW THROUGH 60H.  BOTH THE ETA AND NGM SLIDE SFC-H85 RIDGE
AXES OVER US...ALLOWING FOR WCSB/ECSB INTERACTION IN THE LOW
LEVELS.  OF COURSE...FLOW ABV H60 IS ENE...AND THIS STEERING WOULD
STILL FAVOR THE COASTAL COS...AT LEAST THROUGH MON.

THE FCST:  TONIGHT...ACTIVITY STARTING A BIT LATER TODAY...PROBABLY
A RESULT OF SLOWER DAYTIME HEATING TO CONVECTIVE TEMP (AROUND 91).
STILL...SHOWERS DEVELOPING ACRS THE S 1/2 OF THE CWFA...AND ECSB
ACTIVITY HAS BEGUN N OF THE SPACECOAST.

EXPECT INTERIOR COUNTIES TO CRANK UP BETWEEN 2 AND 4 PM...THEN
ACTIVITY TO SHIFT TOWARDS THE WCSB BY 5 OR SO.  BOUNDARY/SEA BREEZE
INTERACTIONS SHOULD LIGHT UP THE COAST AGAIN THIS EVENING.  OF
INTEREST IS LASTING MOISTURE AFTER MIDNIGHT...ESP ACRS THE FAR
N.  WILL SEPARATE LEVY CO OUT FOR TIMING PURPOSES (NONE)...AND GO
LIKELY COAST (ENDING AROUND MIDNIGHT)...SCT INTERIOR (EVE).

MON...DUE TO UNCERTAINTY OF SEA BREEZE INTERACTION...PREFER TO PLAY
IT SAFE AND BROAD BRUSH A 40 POP EVERYWHERE FOR AFTN.  WITH WCSB
A BIT MORE ACTIVE EARLIER...ACTIVITY COULD FIRE ALONG IT BEFORE 3
PM...WITH COVERAGE INCREASING DURING LATE AFTN/EARLY EVE FROM
BOUNDARY INTERACTIONS...ECSB/WCSB COLLISION...ETC.

MON NIGHT...AGAIN...WILL NOT GET CUTE DUE TO UNCERTAINTY.  MODIFYING
THE AVN GIVES AN EARLIER END TO PCPN EVERYWHERE...WITH PERHAPS MORE
RAPIDLY DECREASING COVERAGE.  WILL CALL IT A 30 POP FOR EVE...THEN
FAIR.

TUE...THIS TIME...WILL FAVOR THE INTERIOR COS FOR AFTN CONVECTION
FOR A NUDGE UPWARD ON POP (40 VS. 30 ON COAST).

EXTENDED...MRF LINKS UP WHATS LEFT OF SHEARED SHORT WAVE WITH A
DEEPENING TROUGH ACROSS THE MIDWEST.  THOUGH THE MID LATITUDE
TROUGH WILL NEVER MAKE IT...ITS IMPRINT MAY LEAVE A WEAKNESS IN THE
CENTRAL/ERN GULFMEX.  THIS IN TURN WILL INCREASE H50 S FLOW...
JUSTIFYING HIGHER MEAN RH VALUES ACRS THE REGION.

WITH THIS IN MIND...NO SENSE IN TRYING TO TIME PCPN.  PCLDY/SCT
SHOWERS/TSTMS AND PERSISTENCE TEMPS THROUGH FRI.

MARINE:  WILL SEPARATE N 2 LEGS FROM THE S LEG FOR E/SE COMPONENT
(VS SE/S COMPONENT).  OTRW...NOSIG WX OUTSIDE OF TSTMS.

FIRE WX:  RH VALUES 50 PCT OR GREATER AND GENERALLY LIGHT WINDS
PRECLUDE ANY HEADLINES.

PRELIM NUMBER:
TPA BB 073/091/074/091 5333
FMY BB 073/093/073/092 6433 88

.TBW...NONE.

GOLDSMITH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 7:34 PM EDT	Severe Thunderstorm Warning	TBW	Pasco	26 min

Nearby

Severe Thunderstorm Warnings in Florida, 2000 Every severe thunderstorm warning in 2000

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.