Alert archive / Florida / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 4, NWS Tampa Bay, FL

May 9, 2000Polk County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at May 9, 2000, 4:32 PM EDT for Polk County, Florida. It was in force for 58 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 9, 2000, 4:32 PM EDT (20:32 UTC)
Expired
May 9, 2000, 5:30 PM EDT
In force
58 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Polk County, FL

What was reported inside it

TimeReportWhereRemark
May 9, 4:45 PM EDTHail 0.75Babson Park, FLDime sized hail that lasted for five minutes was reported by a Skywarn Spotter in Babson Park.

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

Tampa Bay, FL (KTBW), launched 12:00Z, 8.5 hours before the alert went out and 74 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-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2000-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 412 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2000-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
412 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
860 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
60 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.

000 
WUUS52 KTBW 092034
SVRTBW
FLC105-092130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
ISSUED BY MELBOURNE FL
432 PM EDT TUE MAY 9 2000

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL POLK COUNTY
  ...IN CENTRAL FLORIDA

* UNTIL 530 PM EDT.

* AT 427 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
A  SEVERE THUNDERSTORM JUST SOUTH OF LAKE WALES...MOVING EAST AT 10 
MPH.

* THIS STORM WILL AFFECT HIGHLAND PARK AND HILLCREST HEIGHTS THROUGH 
  500 PM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. IF
THE STORM APPROACHES YOU...MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR.

$$

LAT...LON 2792 8164 2775 8162 2777 8125 2799 8140

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 May 9, 3:50 PM EDT, 42 minutes earlier.

Area forecast discussion, May 9, 3:50 PM EDT, 42 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
350 PM EDT TUE MAY 9 2000

THE AVIATION MODEL CONTINUED TO BE SUPERIOR IN HANDLING THE SLOWLY
EVOLVING SUB-SYNOPTIC FEATURE CHANGES OVER FLORIDA AND SURROUNDING
WATERS OVER THE PAST 24 HOURS.

AVN CONTINUED TO FORECAST THE EAST TO WEST RIDGE AXIS OVER NORTH
FLORIDA TO PUSH SOUTH INTO CENTRAL FLORIDA AS A COLD FRONT MOVES
SOUTHEAST ACROSS GEORGIA AND ALABAMA.

WEAK 500 MB TROUGH OVER THE CENTRAL GULF OF MEXICO WILL MOVE
EAST OF FLORIDA BY LATE WEDNESDAY AND MINIMIZE THUNDERSTORM THREAT.

THUS SOUTHWEST SURFACE FLOW OCCUR OVER MOST OF WEST CENTRAL FLORIDA
ON WEDNESDAY AND THURSDAY

CURRENTLY...WIDELY SCATTERED THUNDERSTORMS EAST OF INTERSTATE 75
CORRIDOR EXTENDING INTO CENTRAL FLORIDA WILL CONTINUE THROUGH EARLY
EVENING.  DUE TO DRY AIR ALOFT AND WEAK PVA AHEAD OF THE ADVANCING
500 MB TROUGH...A FEW OF THESE STORMS WILL HAVE THE POTENTIAL TO
PRODUCE LIMITED HAIL...BRIEF HEAVY RAIN AND GUSTS UP TO 40 MPH.

TPA 68/86/69/90 -1--
FMY 70/88/71/92 -3-2

.TBW...NONE.

ZALESKI

In the hours before

Special weather statement, May 9, 12:40 PM EDT, 3 hours 52 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-DDHHMM-

WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1240 PM EDT TUE MAY 9 2000

...A FEW THUNDERSTORMS POSSIBLE ACROSS WEST CENTRAL AND SOUTHWEST
FLORIDA TODAY...

INCREASING LOW LEVEL ATMOSPHERIC MOISTURE COUPLED WITH AFTERNOON
SUNSHINE AND COASTAL SEA BREEZES...WILL BRING A THREAT OF WIDELY
SCATTERED SHOWERS AND THUNDERSTORMS OVER PORTIONS OF WEST CENTRAL
AND SOUTHWEST FLORIDA.

MOST OF THE WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WILL OCCUR
MAINLY EAST OF THE INTERSTATE 75 CORRIDOR OVER WEST CENTRAL AND
SOUTHWEST FLORIDA THIS AFTERNOON.

THE PRIMARY THREAT FROM THESE STORMS WILL BE BRIEF HEAVY RAIN...
FREQUENT LIGHTNING...AND GUSTY WINDS OF UP TO 40 MPH.

EMERGENCY MANAGEMENT OFFICIALS...STORM SPOTTERS AND RESIDENTS SHOULD
MONITOR THE WEATHER TODAY AND BE ALERT FOR FUTURE STATEMENTS FROM
THE NATIONAL WEATHER SERVICE.

ZALESKI

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 4:21 PM EDTSevere Thunderstorm WarningTBWPasco, Sumter54 min
May 9, 5:05 PM EDTSevere Thunderstorm WarningTBWHighlands55 min

Nearby

Severe Thunderstorm Warnings in Florida, 2000Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.