Alert archive / Florida / Flash Flood Warnings in 2003

Flash Flood Warning 10, NWS Tampa Bay, FL

August 9, 2003Manatee County, Florida

NWS Tampa Bay, FL issued this flash flood warning at Aug 9, 2003, 12:48 PM EDT for Manatee County, Florida. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 9, 2003, 12:48 PM EDT (16:48 UTC)
Expired
Aug 9, 2003, 3:00 PM EDT
In force
2 hr
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Manatee County, FL

The radar

The Tampa radar (KTBW), 26 km from the middle of the area, began a volume at 16:48 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.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 4.8 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 12:00Z on 2003-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1194 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 12:00Z on 2003-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.1939Sfc1 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
1194 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
831 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KTBW 091648
FFWTBW
FLC081-091845-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1248 PM EDT SAT AUG 9 2003

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN MANATEE COUNTY IN FLORIDA.

  FLOODING WILL AFFECT THE FOLLOWING LOCATIONS.
  PALMETTO.
  BRADENTON.
  PARRISH.
  CORTEZ.
  ANNA MARIA ISLAND
  HOLMES BEACH

* UNTIL 300 PM EDT

* AT 1248 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  INDICATED RAINFALL RATES OF THREE INCHES PER HOUR WITH A LARGE     
  AREA OF SHOWERS AND THUNDERSTORMS COVERING ALL OF MANATEE COUNTY.

WEATHER SPOTTERS IN THE BRADENTON HAVE ALREADY REPORTED OVER THREE 
INCHES OF RAIN WITHIN THE LAST HOUR WITH THESE STORMS.

ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXECTED TO TRAIN ACROSS
THE WARNING AREA THROUGH MID AFTERNOON...WITH AN ADDITIONAL 1 TO 3
INCHES OF RAIN WITH LOCALLY HIGHER AMOUNTS POSSIBLE. THE EXCESSIVE 
RUNOFF WILL CAUSE FLOODING OF LOW LYING AREAS AND INTERSECTIONS. 
POOR DRAINAGE AREAS ARE MOST AT RISK. DO NOT DRIVE THROUGH FLOODED 
ROADS

THIS IS A LIFE THREATENING FLOOD MOST FLOOD DEATHS OCCUR IN
AUTOMOBILES. DO NOT CROSS FLOODED ROADWAYS OR STREAMS. IF NEARING A
FLOOD AREA...TURN AROUND AND DRIVE TO HIGHER TERRAIN.

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

&&

$$

LAT...LON 2763 8240 2746 8248 2740 8266 2754 8275

57
1 follow-up statement
000 
WGUS72 KTBW 091743
FFSTBW
FLC081-091900-

FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
143 PM EDT SAT AUG 9 2003

...A FLASH FLOOD WARNING CONTINUES FOR NORTHWESTERN MANATEE COUNTY...
INCLUDING PALMETTO...BRADENTON...

...UNTIL 300 PM EDT.

AT 130 PM EDT...WEATHER SPOTTERS IN THE BRADENTON AREA REPORTED 
RAINFALL AMOUNTS OF 3 TO 4 INCHES IN THE LAST TWO HOURS. THESE HEAVY 
RAINS HAVE CAUSED MODERATE FLOODING OF ROADWAYS AND INTERSECTIONS
WITH RYE AND WATERLINE ROADS NOW BEING CLOSED DUE TO HIGH WATERS.

AT 143 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUES TO 
INDICATE RAINFALL RATES OF THREE INCHES PER HOUR WITH A LARGE AREA 
OF SHOWERS AND THUNDERSTORMS COVERING ALL OF MANATEE COUNTY. DOPPLER 
RADAR INDICATES THAT ADDITIONAL SHOWERS AND THUNDERSTORMS EXTEND OUT 
OVER THE ADJACENT GULF WATERS FOR MORE THAN 50 MILES. THESE SHOWERS 
AND STORMS WILL CONTINUE TRAIN ACROSS THE WARNING AREA THROUGH MID 
AFTERNOON WITH AN ADDITIONAL 1 TO 3 INCHES OF RAIN LIKLY...WITH 
LOCALIZED HIGHER AMOUNTS POSSIBLE.

THE EXCESSIVE RUNOFF FROM THESE HEAVY RAINS WILL CAUSE MODERATE 
FLOODING OF LOW LYING AREAS...INTERSECTIONS AND ROADWAYS. POOR 
DRAINAGE AREAS ARE MOST AT RISK. DO NOT DRIVE THROUGH FLOODED ROADS

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT CROSS FLOODED 
ROADWAYS OR STREAMS. IF NEARING A FLOOD AREA...TURN AROUND AND DRIVE 
TO HIGHER TERRAIN.

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

&&

$$

LAT...LON 2764 8234 2741 8232 2742 8275 2758 8276

57

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 Aug 9, 8:30 AM EDT, 4 hours 18 minutes earlier.

Area forecast discussion, Aug 9, 8:30 AM EDT, 4 hours 18 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
830 AM EDT SAT AUG 9 2003

NUMEROUS SHOWERS OVER THE GULF MOVING NORTHEAST INTO COASTAL
COUNTIES. MOST AREAS WILL SEE MEASURABLE RAIN TODAY...AND MANY AREAS
COULD SEE LOCALLY HEAVY RAINFALL...ESPECIALLY WHERE TRAINING OF
SHOWERS SETS UP. HIGH TEMPERATURES COULD BE LOWER THAN CURRENTLY
FORECAST...ESPECIALLY NORTHERN ZONES...WHERE EXTENSIVE MID AND HIGH
CLOUDS SHOULD LIMIT HEATING ALL DAY. WILL PROBABLY LEAVE AS IS...
SINCE JUST AN HOUR OF SUN WOULD BRING TEMPS TO AT LEAST MID 80S.
CURRENT ZONE PACKAGE INDICATES POTENTIAL FOR HEAVY RAINFALL SO NO
UPDATES NEEDED AT THIS TIME.

--MARINE--
WINDS STILL IN 10 TO 15 KT RANGE AND SEAS 2 TO 4 FT. SHOWERS QUITE
NUMEROUS TAMPA BAY NORTHWARD...AND MAY KEEP NUMEROUS SHOWERS RATHER
THAN DROP TO SCATTERED IN THE AFTERNOON. GOING TO ADD WINDS AND
SEAS HIGHER NEAR SHOWERS AND STORMS AS 88D SHOWING LOCALLY 20 TO 30
KTS IN SMALL AREAS.

.TBW...FLOOD WATCH THROUGH SUNDAY FOR LEVY...CITRUS...SUMTER...
       HERNANDO...PASCO...HILLSBOROUGH...PINELLAS...MANATEE...
       POLK...SARASOTA...HARDEE...DESOTO...HIGHLANDS...LEE AND
       CHARLOTTE COUNTIES.

JILLSON
Hazardous weather outlook, Aug 9, 5:15 AM EDT, 7 hours 33 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-091400-

WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL FL
515 AM EDT SAT AUG 9 2003

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

.DAY ONE...TODAY AND TONIGHT:

...A FLOOD WATCH CONTINUES TODAY FOR ALL OF WEST CENTRAL AND
   SOUTHWEST FLORIDA...

THE CONTINUED COMBINATION OF UPPER LEVEL ENERGY AND DEEP TROPICAL
MOISTURE IS EXPECTED TO PRODUCE NUMEROUS SHOWERS AND THUNDERSTORMS
AGAIN TODAY.  MANY AREAS ALONG THE WEST COAST OF FLORIDA RECEIVED
2 TO 3 INCHES OF RAINFALL ON FRIDAY...WITH LOCALLY HIGHER AMOUNTS OF
4 TO 6 INCHES. AN ADDITIONAL 1 TO 2 INCHES OF RAINFALL WILL BE POSSIBLE
AGAIN TODAY...WITH LOCALLY HEAVIER AMOUNTS OF 3 TO 4 INCHES. THIS
WILL CONTINUE TO AGGRAVATE ANY ONGOING FLOODING ALONG AREA RIVERS...
STREAMS AND LOW LYING AREAS NORTH OF THE TAMPA BAY REGION...AND
COULD CAUSE ADDITIONAL RIVERS AND STREAMS TO APPROACH OR GO ABOVE
BANK-FULL.

SCATTERED SHOWERS AND THUNDERSTORMS OVER THE EASTERN GULF WATERS
AND THE COASTAL COUNTIES THIS MORNING...WILL BECOME MORE NUMEROUS BY
THIS AFTERNOON. INDIVIDUAL SHOWERS AND THUNDERSTORMS ARE EXPECTED TO
MOVE TOWARD THE EAST AND NORTHEAST AT 10 TO 15 MPH.

ALTHOUGH THE MAIN THREAT TODAY WILL BE LOCALLY HEAVY RAINFALL...
REMEMBER ALL THUNDERSTORMS CAN PRODUCE DEADLY CLOUD TO GROUND
LIGHTNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY:

...THE THREAT FOR LOCALLY HEAVY RAINFALL WILL CONTINUE FOR SUNDAY...

CONDITIONS WILL REMAIN FAVORABLE FOR LOCALLY HEAVY RAINFALL ACROSS
MAINLY THE CENTRAL AND SOUTHERN PORTIONS OF THE REGION FOR SUNDAY.
BY MONDAY...HIGH PRESSURE IS EXPECTED TO BEGIN BUILDING BACK ACROSS
THE SOUTHERN AREA...THEN FARTHER NORTH ACROSS THE CENTRAL AREA
BY LATER TUESDAY AND WEDNESDAY. RAINFALL IS EXPECTED TO RETURN
TO THE MORE TYPICAL AFTERNOON AND EVENING TIMING TUESDAY THROUGH
FRIDAY.

.SPOTTER CALL TO ACTION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY AND SUNDAY...
PRIMARILY FOR RAINFALL AND LOCAL OVERLAND OR RIVER FLOOD REPORTS.

RFM

In the hours before

Special weather statement, Aug 9, 9:35 AM EDT, 3 hours 13 minutes before
FLZ050-091415-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
935 AM EDT SAT AUG 9 2003

A BROKEN BAND OF STRONG THUNDERSTORMS WILL AFFECT TARPON
SPRINGS...PALM HARBOR...DUNEDIN AND INDIAN ROCKS BEACH...UNTIL 1015
AM EDT. OCCASIONAL CLOUD TO GROUND LIGHTNING IS EXPECTED. IF CAUGHT
OUTSIDE...CROUCH DOWN IN A LOW SPOT...AWAY FROM TALL OBJECTS. AT 930
AM EDT...PINELLAS COUNTY EMERGENCY MANAGEMENT REPORTED A FUNNEL CLOUD
OVER TARPON SPRINGS. OTHER FUNNEL CLOUDS WILL BE POSSIBLE AS
ADDITIONAL SHOWERS AND THUNDERSTORMS MOVE ONSHORE FROM THE GULF THE
REMAINDER OF THE MORNING. IF THREATENING WEATHER APPROACHES YOUR
LOCATION...MOVE INDOORS IMMEDIATELY.

MCMICHAEL
Special weather statement, Aug 9, 11:31 AM EDT, 1 hour 17 minutes before
FLZ050-051-055-060-061-091615-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1131 AM EDT SAT AUG 9 2003

...STRONG THUNDERSTORMS MOVING THROUGH PINELLAS AND HILLSBOROUGH
COUNTY...
A LINE OF THUNDERSTORMS...MOVING EAST AT 20 MPH...WILL AFFECT
PINELLAS PARK AND BRANDON...UNTIL 1215 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.
TORRENTIAL RAINS WILL CAUSE PONDING OF WATER ON ROADS...AND MINOR
FLOODING OF POOR DRAINAGE AREAS.

JILLSON
Special weather statement, Aug 9, 12:02 PM EDT, 46 minutes before
FLZ051-052-055-056-060-091645-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1202 PM EDT SAT AUG 9 2003

A LINE OF STRONG THUNDERSTORMS MOVING NORTHEAST AT 20 MPH WILL
AFFECT RUSKIN...APOLLO BEACH...SUN CITY CENTER...WIMAUMA...GIBSTON...
BRANDON...DUETTE...FORT LONESOME...MYAKKA HEADY...AND LITHIA UNTIL
1245 PM EDT. GUSTY WINDS UP TO 40 MPH WILL OCCUR. EXCESSIVE CLOUD TO
GROUND LIGHTNING IS EXPECTED IF OUTSIDE...CROUCH DOWN IN A LOW
SPOT...AWAY FROM TALL OBJECTS. IF INDOORS...REFRAIN FROM USING
ELECTRICAL APPLIANCES. TORRENTIAL RAINS WILL CAUSE PONDING OF WATER
ON ROADS...AND MINOR FLOODING OF POOR DRAINAGE AREAS.

MCMICHAEL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 11:06 AM EDTSpecial Marine WarningTBW54 min
Aug 9, 11:06 AM EDTSpecial Marine WarningTBW54 min
Aug 9, 3:00 PM EDTFlash Flood WarningTBWManatee3 hr

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; radar from the NEXRAD Level II archive.