Alert archive / Florida / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 29, NWS Tampa Bay, FL

April 25, 2003Pinellas County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Apr 25, 2003, 11:01 PM EDT for Pinellas County, Florida. It was in force for 14 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
Apr 25, 2003, 11:01 PM EDT (03:01 UTC)
Expired
Apr 25, 2003, 11:15 PM EDT
In force
14 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), 26 km from the middle of the area, began a volume at 03:04 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, 3.0 hours before the alert went out and 26 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 2003-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1699 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 2003-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 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
1699 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
971 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.9
Supercell composite
6.1

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KTBW 260301
SVRTBW
FLC103-260315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1100 PM EDT FRI APR 25 2003

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS EXTENDED A

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

* UNTIL 1115 PM EDT

* AT 1100 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL...OVER SAINT PETERSBURG...
  MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  SAINT PETERSBURG.

AT 1055 PM EDT...WEATHER SPOTTERS REPORTED QUARTER SIZE HAIL IN WEST 
SAINT PETERSBURG...IN THE TYRONE AREA.

QUARTER SIZE HAIL WILL CONTINUE. MOVE INDOORS IMMEDIATELY.

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN RUSKIN.

&&

LAT...LON 2786 8270 2770 8279 2759 8262 2775 8251

$$

88

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 Apr 25, 9:22 PM EDT, 1 hour 39 minutes earlier.

Area forecast discussion, Apr 25, 9:22 PM EDT, 1 hour 39 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
922 PM EDT FRI APR 25 2003

LINE OF THUNDERSTORMS CONTINUES TO DRIFT SLOWLY SOUTH INTO CENTRAL
ZONES...BUT APPEARS TO BE RUNNING OUT OF GAS.  OUTFLOW HAS MOVED
OUT WELL SOUTH OF STORMS WITH NEW CONVECTION DEVELOPING BEHIND IT.
STORMS OVER INTERIOR COUNTIES CONTINUING TO MOVE EAST SOUTHEAST
WHILE CONVECTION ALONG AND OFF COAST MOVING BACK TO NORTHEAST.  SO
IT WOULD APPEAR THAT STORMS WILL NOT MAKE IT MUCH FURTHER SOUTH
DURING THE NEXT FEW HOURS.  STORMS HAVE PRODUCED SOME LOCALLY HEAVY
RAINFALL AMOUNTS WITH RADAR ESTIMATES OVER 3 INCHES IN A FEW SPOTS.
TAMPA INTERNATIONAL HAS ALREADY SET A NEW RECORD DAILY RAINFALL FOR
TODAY WITH OVER 1.51 INCHES AS OF 9 PM...OLD RECORD WAS 1.23 INCHES
SET IN 1991...AND MORE RAIN STILL TO COME.

LATEST RUC INDICATES CURRENT VORT MAX MOVING ACROSS FLORIDA THIS
EVENING MOVING EAST OUT INTO ATLANTIC OVERNIGHT WHILE ANOTHER ONE
APPROACHES AND MOVES ACROSS THE PENINSULA LATE TONIGHT.  MORE
CONVECTION STILL OUT OVER GULF MOVING EAST NORTHEAST AND WITH NEXT
SLIGHTLY WEAKER VORT MAX MOVING EAST LATER TONIGHT...WILL LEAVE
CHANCE POPS IN FOR NORTHERN AND CENTRAL ZONES OVERNIGHT.  WILL LEAVE
SLIGHT CHANCE DOWN SOUTH AS NEXT VORT MAX MAY HELP TO PUSH ACTIVITY A
LITTLE FURTHER SOUTH LATE TONIGHT.  WILL ALSO NOT UPDATE ZONES UNTIL
ABOUT 11 PM AND WATCH RADAR TRENDS FOR THE NEXT HOUR OR SO.

WINDS OVER COASTAL WATERS FROM ALL DIFFERENT DIRECTIONS THANKS TO
STORMS...BUT SHOULD SETTLE DOWN AND COME BACK AROUND TO THE SOUTH
OVER ENTIRE AREA LATER TONIGHT.  WILL DROP SMALL CRAFT EXERCISE
CAUTION AND MAKE SOME OTHER MINOR ADJUSTMENTS TO MARINE FORECAST FOR
EVENING UPDATE.

.TBW...NONE.

PRC
Hazardous weather outlook, Apr 25, 11:30 AM EDT, 11 hours 31 minutes before
FLZ039-042-043-048-049-252130-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1130 AM EDT FRI APR 25 2003

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

.DAY ONE...TODAY:

A STRONG TO SEVERE LINE OF THUNDERSTORMS CROSSING THE FLORIDA
PANHANDLE AND THE FAR NORTHERN GULF WILL APPROACH THE NATURE COAST
THIS AFTERNOON. WHILE THE LINE IS EXPECTED TO WEAKEN SOME THIS
AFTERNOON...ISOLATED SEVERE THUNDERSTORMS ARE STILL POSSIBLE. THE
STRONGEST STORMS WILL CONTAIN FREQUENT TO EXCESSIVE LIGHTNING AND
GUSTY WINDS IN EXCESS OF 50 MPH.

WHEN SKIES DARKEN...MOVE INDOORS. IF THERE IS TIME...UNPLUG
APPLIANCES AND ELECTRICAL EQUIPMENT. WAIT UNTIL THE STORM ENDS BEFORE
USING THE TELEPHONE OR RUNNING WATER.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY:

.SPOTTER CALL TO ACTION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED LATER THIS AFTERNOON IF THE
THREAT OF SEVERE THUNDERSTORMS INCREASES.

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

In the hours before

Special weather statement, Apr 25, 6:51 PM EDT, 4 hours 10 minutes before
FLZ039-042-043-048-049-252300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
651 PM EDT FRI APR 25 2003

...SEVERE THUNDERSTORM WATCH WILL EXPIRE AT 7 PM EDT FOR THE
FOLLOWING LOCATIONS...

HERNANDO...CITRUS...LEVY...SUMTER AND PASCO.

INCLUDING THE CITIES OF...BROOKSVILLE...CHIEFLAND...INVERNESS...NEW
PORT RICHEY...SPRING HILL AND ZEPHYRHILLS.

DOPPLER RADAR INDICATED THAT HEAVY RAIN...SMALL HAIL...AND GUSTY
WINDS WERE STILL POSSIBLE FROM THUNDERSTORMS...MAINLY IN PASCO
COUNTY...UNTIL 730 PM.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA OUTLETS FOR
UPDATES.

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

BSG
Special weather statement, Apr 25, 7:03 PM EDT, 3 hours 58 minutes before
FLZ049-252330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
703 PM EDT FRI APR 25 2003

...STRONG THUNDERSTORMS WILL AFFECT SOUTHERN PASCO COUNTY...
A THUNDERSTORM...MOVING NORTHEAST AT 15 MPH...WILL AFFECT
ODESSA...LAND O LAKES AND WESLEY CHAPEL...UNTIL 730 PM EDT. GUSTY
WINDS UP TO 40 MPH WILL OCCUR. FREQUENT CLOUD TO GROUND LIGHTNING IS
EXPECTED. IF CAUGHT OUTSIDE...CROUCH DOWN IN A LOW SPOT...AWAY FROM
TALL OBJECTS. HAIL UP TO ONE HALF INCH IN DIAMETER IS EXPECTED.
TORRENTIAL RAINS WILL REDUCE VISIBILITY TO NEAR ZERO AT TIMES.
MOTORISTS MAY WANT TO DELAY TRAVEL.

GOLDSMITH
Special weather statement, Apr 25, 7:17 PM EDT, 3 hours 44 minutes before
FLZ050-051-260000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
717 PM EDT FRI APR 25 2003

...STRONG THUNDERSTORMS MOVING INTO THE TAMPA BAY METRO AREA...
A LINE OF THUNDERSTORMS...MOVING SOUTHEAST AT 20 MPH...WILL AFFECT
CENTRAL AND NORTHERN PINELLAS COUNTY BEFORE 8 PM...AND TAMPA AND THE
NORTHERN SUBURBS BETWEEN 745 AND 830 PM. GUSTY WINDS UP TO 40 MPH
WILL OCCUR. FREQUENT CLOUD TO GROUND LIGHTNING IS EXPECTED. IF
CAUGHT OUTSIDE...CROUCH DOWN IN A LOW SPOT...AWAY FROM TALL OBJECTS.
TORRENTIAL RAINS WILL REDUCE VISIBILITY TO NEAR ZERO AT TIMES.
MOTORISTS MAY WANT TO DELAY TRAVEL.

GOLDSMITH
Special weather statement, Apr 25, 8:10 PM EDT, 2 hours 51 minutes before
FLZ050>052-260045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
810 PM EDT FRI APR 25 2003

...STRONG THUNDERSTORMS WITH TORRENTIAL RAINS WILL CONTINUE TO
AFFECT TAMPA AND THE EASTERN AND SOUTHERN SUBURBS...

THUNDERSTORMS...MOVING SOUTHEAST AT 20 MPH...WILL MOVE OUT OF TAMPA
BY 815 PM BUT CONTINUE TO AFFECT THE EAST BAY
COMMUNITIES...INCLUDING RIVERVIEW...APOLLO BEACH...AND
GIBSONTON...THROUGH 845 PM.  STRONG STORMS WILL ALSO AFFECT WESTERN
POLK COUNTY...INCLUDING LAKELAND...MULBERRY...AND BARTOW.

FREQUENT CLOUD TO GROUND LIGHTNING IS EXPECTED. IF CAUGHT
OUTSIDE...CROUCH DOWN IN A LOW SPOT...AWAY FROM TALL OBJECTS. THIS
STORM WILL PRODUCE PEA SIZE HAIL. RAINFALL RATES OF 1 TO 2 INCHES
PER HOUR WILL OCCUR. MOTORISTS CAN EXPECT PONDING OF WATER ON
ROADS...AND MINOR FLOODING OF POOR DRAINAGE AREAS.

GOLDSMITH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 25, 10:23 PM EDTSevere Thunderstorm WarningTBWPinellas37 min
Apr 25, 10:58 PM EDTSpecial Marine WarningTBW32 min
Apr 25, 11:10 PM EDTSevere Thunderstorm WarningTBWHillsborough35 min
Apr 26, 12:37 AM EDTFlash Flood WarningTBWPinellas3 hr
Apr 26, 2:34 AM EDTSevere Thunderstorm WarningTBWSarasota26 min
Apr 26, 4:43 AM EDTSpecial Marine WarningTBW92 min
Apr 26, 6:21 AM EDTSpecial Marine WarningTBW84 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.