Alert archive / Florida / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 80, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 21, 2003, 5:00 PM EDT for Polk County, Florida. It was in force for 30 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
- Jul 21, 2003, 5:00 PM EDT (21:00 UTC)
- Expired
- Jul 21, 2003, 5:30 PM EDT
- In force
- 30 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Counties, with a storm outline in the text
County Polk County, FL
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 12:00Z, 9.0 hours before the alert went out and 88 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.
- Mixed-layer CAPE
- 961 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 1072 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
953 WUUS52 KTBW 212100 SVRTBW FLC105-212130- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 500 PM EDT MON JUL 21 2003 THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL POLK COUNTY IN FLORIDA. * UNTIL 530 PM EDT * AT 500 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS...OVER HAINES CITY...MOVING NORTHEAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT... HAINES CITY. SEVERE THUNDERSTORMS CONTAIN WIND GUSTS OF 60 MPH OR HIGHER...AND HAIL THE SIZE OF PENNIES OR LARGER. MOVE TO A PLACE OF SAFETY. 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 2810 8172 2796 8159 2805 8146 2818 8156 $$ 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 Jul 21, 1:01 PM EDT, 3 hours 59 minutes earlier.
Area forecast discussion, Jul 21, 1:01 PM EDT, 3 hours 59 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 101 PM EDT MON JUL 21 2003 CURRENTLY: POPCORN SHOWERS AND THUNDERSTORMS ARE UNDER WAY... ALTHOUGH DRY AIR AT MID LEVELS IS KEEPING THEM FROM LASTING TOO LONG SO FAR. THEY ARE MOVING SLOWLY INLAND AS EXPECTED. SHORT TERM (TNGT THRU WED): NOT MUCH CHANGE IN WEATHER THE FIRST HALF OF THE WEEK. SURFACE RIDGE OVER THE SOUTHERN FA WILL KEEP LOW LEVEL SOUTHWESTERLY FLOW OVER MOST OF THE AREA IN TACT. THIS WILL MEAN MOSTLY LATE MORNING THROUGH MID AFTERNOON ACTIVITY ALONG THE COAST... SHIFTING INLAND FOR THE MID AFTERNOON THROUGH EARLY EVENING HOURS. DAYTIME MAX TEMPS NEAR NORMAL WITH MINS A LITTLE ABOVE NORMAL NEAR THE COAST. EXTENDED (THU THRU MON): LOTS OF UNCERTAINTY IN THE EXTENDED PERIOD DUE TO TD 6. CURRENT FORECAST TAKES TD 6 TO THE SOUTH COAST OF CENTRAL CUBA AS A TROPICAL STORM THURSDAY MORNING...THEN INTO THE EASTERN GULF OF MEXICO ON FRIDAY. AT THIS POINT...DECIDED NOT TO INCREASE WINDS/SEAS FROM WHAT WAS IN PREVIOUS PACKAGE. I DID TAKE THE WINDS A BIT MORE SOUTHEASTERLY AS THE SYSTEM PASSES BY. ASIDE FROM TD 6...SHOULD SEE STANDARD AFTERNOON/EVENING TYPE CONVECTION EACH DAY WITH POPS NEAR CLIMO. SFC RIDGE AXIS MOVES FROM CENTRAL FLORIDA ON THURSDAY TO NORTHERN FLORIDA ON SATURDAY...THEN NORTH OF FLORIDA SUNDAY AND MONDAY. THIS SHOULD LEAD TO A TRANSITION FROM MAINLY INLAND SHOWERS AND THUNDERSTORMS ON THURSDAY TO MORE CONCENTRATED SHOWERS AND STORMS ALONG THE COASTAL AREAS FOR THE WEEKEND. MARINE: GENERAL SOUTHWESTERLY FLOW THROUGH WEDNESDAY WITH THE STRONGEST WINDS OVER THE NORTHERN LEG. AS THE SURFACE RIDGE MOVES NORTH LATER IN THE WEEK...WINDS WILL BECOME MORE SOUTHEASTERLY WITH THE ONSHORE TURN IN THE AFTERNOON. OF COURSE...WIND AND SEAS ARE DEPENDENT UPON STRENGTH AND TRACK OF TD 6. FIRE WEATHER: NO CONCERNS. ISC GRIDS ARE IN. PRELIM NUMBERS: TPA 78/90/76/90 1525 FMY 76/92/75/92 2535 GIF 75/92/75/92 3535 SRQ 76/90/76/90 1525 BKV 71/90/73/89 2525 .TBW...NONE. ALSHEIMER/EJ
Hazardous weather outlook, Jul 21, 6:00 AM EDT, 11 hours before
FLZ039-042-043-048>052-055>057-060>062-065-211400- WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 600 AM EDT MON JUL 21 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY: ISOLATED SHOWERS AND THUNDERSTORMS WILL BE FOUND JUST OFFSHORE THIS MORNING AND ARE EXPECTED TO DEVELOP ABOUT 5 TO 10 MILES INLAND BEFORE NOON ALONG THE WEST COAST SEA BREEZE. THE WEST COAST SEA BREEZE BOUNDARY WILL MOVE INLAND THIS AFTERNOON WITH SHOWERS AND THUNDERSTORMS BECOMING MORE NUMEROUS OVER INTERIOR COUNTIES. WATERSPOUTS ARE LIKELY TODAY. REMEMBER...WATERSPOUTS CAN FORM IN BUILDING CLOUDS THAT HAVE NOT YET BECOME A SHOWER OR THUNDERSTORM. KEEP AN EYE TO THE SKY IF YOU ARE OUT ON THE WATER OR IF YOU LIVE NEAR THE COAST. FURTHER INLAND...THE SCATTERED STORMS WILL CAUSE LOCALIZED FLOODING AND BRIEF WIND GUSTS TO 40 MPH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY: TUESDAY AND WEDNESDAY WILL HAVE WEATHER SIMILAR TO TODAY WITH ISOLATED MORNING STORMS NEAR THE COAST AND SCATTERED THUNDERSTORMS INLAND DURING THE AFTERNOON. THE PATTERN CHANGES THURSDAY AND FRIDAY AS A RIDGE OF HIGH PRESSURE MOVES NORTH AND THE LOW LEVEL WINDS TURN FROM THE SOUTHWEST TO THE SOUTHEAST. EXPECT MAINLY SCATTERED AFTERNOON AND EVENING THUNDERSTORMS LATE THIS WEEK. MEANWHILE...TROPICAL DEPRESSION SIX IS FORECAST TO INTENSIFY INTO A TROPICAL STORM AND MOVE THROUGH THE CARIBBEAN THIS WEEK...AND INTO THE GULF OF MEXICO THIS WEEKEND. REFER TO THE LATEST ADVISORY FROM THE NATIONAL HURRICANE CENTER FOR MORE INFORMATION. ON THE INTERNET...VISIT WEATHER DOT GOV...THAT IS W E A T H E R DOT G O V. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. HOWEVER...PLEASE CALL IN ALL REPORTS OF WATERSPOUTS TO THE NATIONAL WEATHER SERVICE OR LAW ENFORCEMENT. NOAH
In the hours before
Special weather statement, Jul 21, 4:56 PM EDT, 4 minutes before
FLZ052-212145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 456 PM EDT MON JUL 21 2003 A THUNDERSTORM...MOVING NORTHEAST AT 10 MPH...WILL AFFECT HAINES CITY AND LOUGHMAN...UNTIL 545 PM EDT. GUSTY WINDS UP TO 40 MPH AND FREQUENT CLOUD TO GROUND LIGHTNING IS EXPECTED. IF CAUGHT OUTSIDE...CROUCH DOWN IN A LOW SPOT...AWAY FROM TALL OBJECTS. THIS STORM MAY PRODUCE PEA SIZE HAIL. TORRENTIAL RAINS WILL CAUSE PONDING OF WATER ON ROADS...AND MINOR FLOODING OF POOR DRAINAGE AREAS.
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.