Alert archive / Florida / Flash Flood Warnings in 2003

Flash Flood Warning 14, NWS Tampa Bay, FL

September 5, 2003Lee County, Florida

NWS Tampa Bay, FL issued this flash flood warning at Sep 5, 2003, 10:29 PM EDT for Lee County, Florida. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 5, 2003, 10:29 PM EDT (02:29 UTC)
Expired
Sep 6, 2003, 1:00 AM EDT
In force
3 hr
Issued by
NWS Tampa Bay, FL
Area
Counties, with a storm outline in the text

County Lee County, FL

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood 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, 2.5 hours before the alert went out and 116 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 2003-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 426 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 2003-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
426 J/kg
Mixed-layer CIN
-95 J/kg
Mixed-layer LCL
600 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KTBW 060229
FFWTBW
FLC071-060500-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1029 PM EDT FRI SEP 5 2003

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LEE COUNTY IN FLORIDA.

  FLOODING WILL AFFECT THE FOLLOWING CITIES.
  SANIBEL.
  FORT MYERS BEACH.
  FORT MYERS.
  CAPE CORAL.

* UNTIL 100 AM EDT

* AT 1025 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
RAINFALL OF 3 TO 5 INCHES OF RAIN HAD FALLEN OVER PORTIONS OF LEE 
COUNTY DURING THE PAST SEVERAL HOURS...WITH LOCALLY HIGHER AMOUNTS 
MAINLY NEAR THE COAST.  SCATTERED SHOWERS WITH LOCALLY HEAVY RAIN 
CONTINUED ACROSS LEE COUNTY...WITH SHOWERS REDEVELOPING OVER THE 
COASTAL WATERS WEST OF CAPTIVA SPREADING ONSHORE TRAINING OVER THE 
SAME AREA.  AN ADDITIONAL 2 TO 4 INCHES OF RAIN IS POSSIBLE OVER 
PORTIONS OF LEE COUNTY THROUGH 1 AM.

SIGNIFICANT FLOODING OF STREETS HAS BEEN REPORTED IN THE CAPE CORAL 
AREA WITH SOME ROADS UNDER A FOOT OF WATER.  MOTORISTS ARE URGED TO 
DRIVE WITH CAUTION TONIGHT.  DO NOT DRIVE THROUGH WATER OF UNKNOWN 
DEPTH.  

DONT BECOME A STATISTIC. TURN AROUND...DONT DROWN

&&

LAT...LON 2699 8208 2630 8147 2632 8229 2690 8251

$$

13

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Sep 5, 9:15 PM EDT, 1 hour 14 minutes earlier.

Area forecast discussion, Sep 5, 9:15 PM EDT, 1 hour 14 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
915 PM EDT FRI SEP 5 2003

CURRENTLY: VISIBLE SATELLITE EARLIER TODAY AND RADAR THIS
EVENING HAS INDICATED THAT TROPICAL STORM HENRI HAD BEEN SINKING
SLOWLY SOUTH.  DEEP CONVECTION HAS BEEN SHEERED WELL TO THE SOUTH AND
EAST OF THE CENTER WITH SCATTERED SHOWERS OVER THE EASTERN GULF OF
MEXICO...MAINLY SOUTH OF TARPON SPRINGS.  AREA OF TRAINING CELLS
REMAINS ACROSS LEE COUNTY WITH LOCALIZED FLOODING LIKELY THIS
EVENING.  TRAINING CELLS COULD PRODUCE 3 TO 6 INCHES OF RAIN THROUGH
MIDNIGHT WITH LOCALLY HIGHER AMOUNTS.

TRICKY FORECAST TONIGHT AS IT HINGES ON THE MOVEMENT OF TROPICAL
STORM HENRI. A EAST NORTHEAST TO NORTHEAST MOTION IS EXPECTED LATER
TONIGHT. BUT UNTIL A DEFINITE TURN TAKES PLACE...MOIST SOUTHWEST FLOW
OFF THE GULF OF MEXICO WILL REMAIN OVER SOUTHWEST FLORIDA.  ALTHOUGH
SIGNIFICANT SHEER WILL CONTINUE OVER THE STORM SYSTEM TONIGHT...
WOULD EXPECT CONVECTION TO FLARE UP OVER THE COASTAL WATERS SOUTH OF
BRADENTON DUE TO INCREASING L/L CONVERGENCE.  ADDITIONAL TRAINING
OF SHOWERS AND ISOLATED THUNDERSTORMS COULD REDEVELOP IN THIS
REGION OVERNIGHT WITH AN ADDITIONAL 3 TO 6 INCHES OF RAIN POSSIBLE...
WITH LOCALLY HIGHER AMOUNTS.  IN GENERAL THOUGH...RAINFALL WILL BE AN
INCH OR LESS ACROSS THE REGION WITH THE EXCEPTION OF LEE COUNTY.

WILL LOWER POPS A BIT OVER THE INTERIOR AND NORTH DUE TO A DECREASE
IN AREAL COVERAGE OF SHOWER ACTIVITY...HOWEVER COULD SEE
REDEVELOPMENT OF SHOWERS AND ISOLATED THUNDERSTORMS OVER ALL OF WEST
CENTRAL FLORIDA OVERNIGHT.

.TBW...TROPICAL STORM WARNING FROM ENGLEWOOD TO THE SUWANNEE RIVER.
    ...FLOOD WATCH THROUGH SATURDAY AFTERNOON ALL ZONES.
    ...SMALL CRAFT EXERCISE CAUTION BONITA BEACH TO ENGLEWOOD.

OGLESBY
Hazardous weather outlook, Sep 5, 6:00 AM EDT, 16 hours 29 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-051500-

WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL FL
600 AM EDT FRI SEP 5 2003

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

.DAY ONE...TODAY:

...A FLOOD WATCH IS IN EFFECT FOR THE WESTERN FLORIDA PENINSULA
THROUGH FRIDAY AFTERNOON...
...A TROPICAL STORM WARNING IS IN EFFECT NORTH OF ENGLEWOOD...

TROPICAL STORM HENRI WAS LOCATED OVER THE EASTERN GULF OF MEXICO
APPROXIMATELY 115 MILES WEST OF SAINT PETERSBURG.  DEEP TROPICAL
MOISTURE ASSOCIATED WITH HENRI WILL PRODUCE WIDESPREAD HEAVY RAINFALL
TODAY...WITH 5 TO 8 INCHES OF RAIN POSSIBLE OVER PORTIONS OF WEST
CENTRAL FLORIDA DURING THE NEXT 2 DAYS...WITH LOCALLY HIGHER AMOUNTS
POSSIBLE JUST TO THE SOUTH AND EAST OF WHERE THE STORM MAKES
LANDFALL.  SIGNIFICANT FLOODING MAY DEVELOP DUE TO THE EXCESSIVE
RAINFALL...ESPECIALLY ALONG RIVERS AND STREAMS WHICH ARE ALREADY NEAR
OR ABOVE FLOOD STAGE.  WINDS WILL INCREASE GRADUALLY INCREASE
TODAY...AND WILL APPROACH TROPICAL STORM STRENGTH ALONG THE COAST
LATE THIS AFTERNOON AND THIS EVENING. TROPICAL STORM FORCE WINDS WILL
LIKELY BE CONFINED TO COASTAL AREAS JUST SOUTH AND EAST OF WHERE THE
CENTER MAKES LANDFALL...WHICH IS EXPECTED TO BE BETWEEN BAYPORT AND
CEDAR KEY.

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

TROPICAL STORM HENRI IS EXPECTED TO BE MOVING AWAY FROM THE FLORIDA
PENINSULA.  HOWEVER DEEP TROPICAL MOISTURE WILL REMAIN OVER
WEST CENTRAL FLORIDA IN THE WAKE OF HENRI.  LOCALLY HEAVY RAIN IS
POSSIBLE WITH SCATTERED SHOWERS AND THUNDERSTORMS ON SATURDAY. IF YOU
LIVE IN AN AREA THAT IS NEAR A RIVER OR STREAM OR IS PRONE TO
FLOODING YOU WILL WANT TO CLOSELY MONITOR WEATHER FORECASTS AND
STATEMENTS THIS WEEKEND.

SCATTERED AFTERNOON SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE
EACH AFTERNOON THE REMAINDER OF THE WEEK.

SPOTTER CALL TO ACTION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATER TODAY AND TONIGHT.

OGLESBY

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 6:35 AM EDTFlash Flood WarningTBWHernando115 min
Sep 6, 7:10 AM EDTTornado WarningTBWPasco35 min

Nearby

Flash Flood Warnings in Florida, 2003Every flash flood 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.