Alert archive / Florida / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 82, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 21, 2004, 7:09 PM EDT for Lee County, Florida. It was in force for 36 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
- Aug 21, 2004, 7:09 PM EDT (23:09 UTC)
- Expired
- Aug 21, 2004, 7:45 PM EDT
- In force
- 36 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Counties, with a storm outline in the text
County Lee County, FL
The radar
The Miami radar (KAMX), 151 km from the middle of the area, began a volume at 23:11 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
Miami, FL (KMFL), launched 12:00Z, 11.2 hours before the alert went out and 151 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
- 2418 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 761 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- -22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS52 KTBW 212309 SVRTBW FLC071-212345- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 709 PM EDT SAT AUG 21 2004 THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN LEE COUNTY IN FLORIDA. * UNTIL 745 PM EDT * AT 709 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL...OVER BONITA SPRINGS...MOVING SOUTH AT 5 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT... BONITA SPRINGS. SEVERE THUNDERSTORMS CONTAIN WIND GUSTS OF 60 MPH OR HIGHER...AND HAIL THE SIZE OF PENNIES OR LARGER. MOVE TO A PLACE OF SAFETY. MOVE INSIDE A STURDY BUILDING. DAMAGING WIND...LARGE HAIL... TORRENTIAL RAIN...AND DEADLY LIGHTNING ARE EXPECTED. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. QUARTER SIZE HAIL IS LIKELY. MOVE INDOORS IMMEDIATELY. && LAT...LON 2645 8163 2642 8183 2616 8179 2620 8155 $$ 57
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 Aug 21, 1:35 PM EDT, 5 hours 34 minutes earlier.
Area forecast discussion, Aug 21, 1:35 PM EDT, 5 hours 34 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 135 PM EDT SAT AUG 21 2004 .SHORT TERM (TNGT-MON)...SURFACE RIDGE AXIS WILL SHIFT TO ACROSS SOUTH FLORIDA WITH A GENERAL SOUTH TO SOUTHWEST FLOW SETTING UP OVER THE AREA THROUGH THE PERIOD. DEEP MOISTURE WILL REMAIN IN PLACE WITH SCATTERED TO NUMEROUS MAINLY AFTERNOON AND EARLY EVENING STORMS EACH DAY. MAY ALSO SEE A FEW LATE NIGHT AND EARLY MORNING STORMS POP UP ALONG THE NATURE COAST IN THE SOUTHWEST FLOW. NO BIG CHANGES WILL BE MADE TO PREVIOUS FORECAST AS THINGS STILL LOOK ON TRACK. TEMPERATURES WILL REMAIN NEAR NORMAL THROUGH THE PERIOD. .LONG TERM (MON NGT-SAT)...SFC RIDGE WILL REMAIN ACROSS SOUTH FL CONTINUING THE S/SW WINDS...WITH A WEAK TROUGH DEVELOPING ACROSS NORTH FL/SOUTH GA. THIS FEATURE WASHES OUT AND THE RIDGE AXIS LIFTS NORTH OF THE AREA ALLOWING EASTERLY WINDS TO RETURN. WEAK RIDGING ALOFT WILL ALLOW FOR MAINLY DIURNAL CONVECTION WITH DEEP MOISTURE IN PLACE KEEPING POPS ON THE HIGH END OF SCATTERED. TEMPS REMAIN NEAR NORMAL THROUGH THE PERIOD. && .MARINE...SOUTH TO SOUTHWEST WINDS GENERALLY LESS THAN 10 KNOTS WITH SEAS MOSTLY LESS THAN 2 FEET WILL CONTINUE THROUGH THE FORECAST PERIOD...EXCEPT IN THE VICINITY OF ANY THUNDERSTORMS. && .FIRE WEATHER...NO HIGHLIGHTS. && .PRELIMINARY POINT TEMPS/POPS... TPA 77 89 77 89 / 20 60 20 50 FMY 75 90 75 90 / 20 50 20 50 GIF 75 91 75 91 / 20 60 20 60 SRQ 75 89 75 89 / 20 60 20 50 BKV 72 88 72 88 / 20 60 20 60 && .TBW WATCHES/WARNINGS/ADVISORIES...NONE. SHORT TERM...PRC LONG TERM...JLC
Hazardous weather outlook, Aug 21, 5:30 AM EDT, 13 hours 39 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 530 AM EDT SAT AUG 21 2004 FLZ039-042-043-048>052-055>057-060>062-065-211530- CHARLOTTE-CITRUS-DE SOTO-HARDEE-HERNANDO-HIGHLANDS-HILLSBOROUGH-LEE- LEVY-MANATEE-PASCO-PINELLAS-POLK-SARASOTA-SUMTER- 530 AM EDT SAT AUG 21 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY: THUNDERSTORMS WILL BE MORE NUMEROUS TODAY AS A WEAK UPPER LEVEL DISTURBANCES PASSES THROUGH THE AREA. THE STORMS WILL INITIALLY BE ISOLATED ALONG THE COAST IN THE MORNING...THEN GRADUALLY MOVE INLAND DURING THE AFTERNOON. LOCALLY HEAVY RAIN IN EXCESS OF 2 INCHES IS POSSIBLE...ALONG WITH FREQUENT LIGHTNING AND GUSTY WINDS TO 40 MPH. SMALL HAIL IS POSSIBLE IN A SPOT OR TWO AS WELL. 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...SUNDAY THROUGH FRIDAY: TYPICAL SUMMERTIME THUNDERSTORMS ARE EXPECTED TO CONTINUE THROUGH THE UPCOMING WEEK. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED LATER THIS AFTERNOON. && FOR ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB SITE AT HTTP://WWW.SRH.NOAA.GOV/TBW (LOWER CASE)
In the hours before
Special weather statement, Aug 21, 2:04 PM EDT, 5 hours 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 204 PM EDT SAT AUG 21 2004 FLZ043-048-049-211845- HERNANDO-PASCO-SUMTER- 204 PM EDT SAT AUG 21 2004 ...STRONG THUNDERSTORMS WILL AFFECT EASTERN PASCO...SOUTHERM SUMTER AND SOUTHEASTERN HERNANDO COUNTIES... THUNDERSTORMS...MOVING EAST AT 15 MPH...WILL AFFECT SAN ANTONIO... DADE CITY AND RIDGE MANOR...UNTIL 245 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. THIS STORM MAY PRODUCE PEA SIZE HAIL. TORRENTIAL RAINS WILL CAUSE PONDING OF WATER ON ROADS...AND MINOR FLOODING OF POOR DRAINAGE AREAS. MCMICHAEL
Special weather statement, Aug 21, 2:53 PM EDT, 4 hours 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 253 PM EDT SAT AUG 21 2004 FLZ043-049-051-052-211930- HILLSBOROUGH-PASCO-POLK-SUMTER- 253 PM EDT SAT AUG 21 2004 ...STRONG THUNDERSTORMS WILL AFFECT SOUTHERN SUMTER...NORTHWEST POLK...SOUTHEAST PASCO...AND EASTERN HILLSBOROUGH COUNTIES... A LINE OF THUNDERSTORMS FROM WEBSTER EXTENDING SOUTHWEST TO LITHIA MOVING EAST AT 10 MPH...WILL AFFECT THE GREEN SWAMP...WINSTON... POLK CITY...PLANT CITY...LITHIA...GIBSONIA...AND LAKELAND...UNTIL 330 PM EDT. GUSTY WINDS UP TO 40 MPH WILL BE POSSIBLE. 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. MOTORISTS SHOULD EXERCISE CAUTION. MCMICHAEL
Special weather statement, Aug 21, 3:28 PM EDT, 3 hours 41 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 328 PM EDT SAT AUG 21 2004 FLZ051-052-055-212015- HILLSBOROUGH-MANATEE-POLK- 328 PM EDT SAT AUG 21 2004 ...STRONG THUNDERSTORMS WILL AFFECT EASTERN HILLSBOROUGH...WESTERN POLK...AND NORTHERN MANATEE COUNTIES... A LINE OF STRONG THUNDERSTORMS...MOVING EAST AT 5 TO 10 MPH...WILL AFFECT PLANT CITY...FORT LONESOME...WINSTON...LITHIA...DUETTE... BRADLEY JUNCTION...MULBERRY...LAKELAND...LAKELAND LINDER AIRPORT...LAKELAND HIGHLANDS...AND GIBSONIA...UNTIL 415 PM EDT. GUSTY WINDS UP TO 40 MPH WILL BE POSSIBLE. 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. MOTORISTS SHOULD EXERCISE CAUTION. MCMICHAEL
Special weather statement, Aug 21, 4:15 PM EDT, 2 hours 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 415 PM EDT SAT AUG 21 2004 FLZ052-056-212100- HARDEE-POLK- 415 PM EDT SAT AUG 21 2004 ...STRONG THUNDERSTORMS WILL AFFECT CENTRAL POLK AND NORTHERN HARDEE COUNTIES... A LINE OF STRONG THUNDERSTORMS MOVING EAST SOUTHEAST AT 10 MPH...WILL AFFECT WINTER HAVEN...WAHNETA...HAINES CITY...WAVERLY...FORT MEADE...LAKE WALES...FORT GREEN...BOWLING GREEN...BARTOW...AND CYPRESS GARDENS...UNTIL 500 PM EDT. GUSTY WINDS UP TO 40 MPH WILL BE POSSIBLE. 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. MCMICHAEL
Nearby
Severe Thunderstorm Warnings in Florida, 2004Every severe thunderstorm warning in 2004
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.