Alert archive / Florida / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 8, NWS Tampa Bay, FL

March 16, 2003Pinellas County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Mar 16, 2003, 11:05 PM EST for Pinellas County, Florida. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 16, 2003, 11:05 PM EST (04:05 UTC)
Expired
Mar 16, 2003, 11:45 PM EST
In force
40 min
Issued by
NWS Tampa Bay, FL
Area
Counties, with a storm outline in the text

County Pinellas County, FL

The radar

The Tampa radar (KTBW), 49 km from the middle of the area, began a volume at 04:08 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 00:00Z, 4.1 hours before the alert went out and 49 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 00:00Z on 2003-03-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 372 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 00:00Z on 2003-03-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.19395878Sfc1 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
372 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1109 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

071 
WUUS52 KTBW 170405
SVRTBW
FLC103-170445-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1103 PM EST SUN MAR 16 2003

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PINELLAS COUNTY IN FLORIDA.

* UNTIL 1145 PM EST

* AT 1103 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS WITH DAMAGING WINDS...FROM 15 MILES
  WEST OF SEMINOLE TO 11 MILES SOUTHWEST OF SAINT PETE BEACH...MOVING
  NORTHEAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL AFFECT...
  INDIAN ROCKS BEACH.
  BELLEAIR.
  CLEARWATER.
  DUNEDIN.
  SAFETY HARBOR.
  OLDSMAR.

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

MOVE INSIDE A STURDY BUILDING. DAMAGING WIND...TORRENTIAL RAIN...AND 
DEADLY LIGHTNING ARE EXPECTED. STAY INSIDE AWAY FROM WINDOWS UNTIL 
THE STORM HAS PASSED.

&&

LAT...LON 2785 8313 2752 8288 2777 8249 2814 8275

$$

23

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 Mar 16, 7:20 PM EST, 3 hours 45 minutes earlier.

Area forecast discussion, Mar 16, 7:20 PM EST, 3 hours 45 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
720 PM EST SUN MAR 16 2003

...SHORT TERM...
WILL BE MAKING A QUICK ZONE UPDATE SOON TO REVISE TIMING OF SHOWERS
AND THUNDERSTORMS OVER THE GULF WATERS. WILL ALSO BE ABLE TO REMOVE
AFTERNOON POP WORDING SOON FOR THE INTERIOR. MAIN REASON FOR UPDATE
IS TO TAKE OUT AFTER MIDNIGHT WORDING AS DISTANCE SPEED TOOLS SHOW
THE PRECIP ARRIVING VERY CLOSE TO THE MIDNIGHT HOUR. WITH THE SHIFT
NORTHWARD IN UPPER DISTURBANCE...FORWARD MOTION OF SQUALL LINE
WILL SLOW...BUT PREFER NOT TO GET TOO CUTE WITH THE TIMING.
OTHERWISE...WILL MAINTAIN HIGH END LIKELY POPS OVERNIGHT AS MODELS
DOING A DECENT JOB DEPICTING CURRENT RAIN BANDS IN THE GULF. THE
KEY TO RAIN FOR THE SOUTHWEST COAST WILL BE THE VORT LOBE EJECTING
OUT OF NORTHERN CUBA AND INTO THE KEYS AS DEPICTED BY THE GFS AND
MESO-ETA. WATER VAPOR VERIFIES THIS SOLUTION AND CURRENT MOSAIC
RADAR INDICATES A GOOD DEAL OF CONVECTION JUST WEST OF THE KEYS. AS
THE PARENT UPPER LOW SWINGS NORTHWARD...THIS PRECIP SHOULD FILL
INTO THE SOUTHWEST COAST NICELY ALBEIT WEAKENED FROM THE
SLIGHTLY COOLER SHELF WATERS. MAY NEED ADDITIONAL UPDATE LATER THIS
EVENING TO UP TO CATEGORICAL POPS AS SYSTEM CONTINUES TO EVOLVE. AS
TO SEVERE POTENTIAL...EXPECT MOSTLY SHOWERS WITH EMBEDDED
THUNDERSTORMS. WITH LOW WET BULB ZEROS IN COLD ATMOSPHERE ALOFT...
HAIL WILL AGAIN BE THE MAIN THREAT. EXPECT ONLY THE STRONGEST FEW
STORMS DURING THE OVERNIGHT PERIOD TO BE STRONG ENOUGH TO PUSH
STORM CORES TO THE NEEDED 15K TO 20K FEET.

...MARINE...
AGAIN...WILL REVISE WORDING TO ACCOUNT FOR REVISED TIMING OF THE
LINE. OTHERWISE...CURRENT PACKAGE LOOKS GOOD AND NO CHANGES PLANNED.

.TBW...NONE.

JTD
Hazardous weather outlook, Mar 16, 5:30 AM EST, 17 hours 35 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-161630-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
530 AM EST SUN MAR 16 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST
FLORIDA.

.DAY ONE...TODAY:

SCATTERED THUNDERSTORMS WILL FORM THIS AFTERNOON ALONG THE
SEABREEZES AND THEN MOVE NORTHEAST ACROSS THE INTERIOR COUNTIES
LATER IN THE AFTERNOON. THE MAIN THREATS WILL BE GUSTY WINDS OR
POSSIBLE SMALL HAIL.

DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY:

A WEAK SURFACE DISTURBANCE MOVING ALONG THE GULF COAST WILL MAINTAIN
A MOIST AND UNSTABLE AIR MASS OVER THE AREA WITH SCATTERED
THUNDERSTORM MONDAY AND ENDING BY EARLY TUESDAY.

THUNDERSTORMS WILL BE ISOLATED WEDNESDAY AND THURSDAYS AFTERNOONS
BEFORE BECOMING SCATTERED FRIDAY WHEN A COLD FRONT TRAVERSES THE
REGION.

.SPOTTER CALL TO ACTION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT
HTTP://WWW.SRH.NOAA.GOV/TBW

RKR

In the hours before

Local storm report, Mar 16, 5:45 PM EST, 5 hours 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN  FL...CORRECTED
545 PM EST SUN MAR 16 2003

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0537 PM    CYPRESS GARDENS           FL   .75 INCH HAIL
03/16/03   POLK                           REPORTED BY STORM SPOTTER.

JTD
Local storm report, Mar 16, 8:49 PM EST, 2 hours 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN  FL
849 PM EST SUN MAR 16 2003

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0330 PM    RIVERVIEW                 FL   .75 INCH HAIL
03/16/03   HILLSBOROUGH                   REPORTED BY OFF-DUTY NWS
                                          EMPLOYEE.

JCM

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 16, 9:02 PM ESTSpecial Marine WarningTBW58 min
Mar 16, 10:12 PM ESTSpecial Marine WarningTBW2 hr
Mar 16, 11:54 PM ESTSevere Thunderstorm WarningTBWHillsborough51 min
Mar 17, 3:13 PM ESTSpecial Marine WarningTBW62 min
Mar 17, 3:48 PM ESTSevere Thunderstorm WarningTBWHillsborough, Manatee, Pinellas, Sarasota27 min

Nearby

Severe Thunderstorm Warnings in Florida, 2003Every severe thunderstorm warning in 2003

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; radar from the NEXRAD Level II archive.