Alert archive / Florida / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 77, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 13, 2004, 1:50 PM EDT for Polk County, Florida. It was in force for 25 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 13, 2004, 1:50 PM EDT (17:50 UTC)
- Expired
- Aug 13, 2004, 2:15 PM EDT
- In force
- 25 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Counties, with a storm outline in the text
County Polk County, FL
The radar
The Melbourne radar (KMLB), 83 km from the middle of the area, began a volume at 17:52 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 13, 7:30 AM EDT | Tornado Watch | SPC | 10 hr |
| Aug 13, 1:45 PM EDT | Tornado Watch | SPC | 12 hr |
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 12:00Z, 5.8 hours before the alert went out and 96 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1607 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -160 m²/s²
- 0-3 km storm-relative helicity
- -117 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 131750 SVRTBW FLC105-131815- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 150 PM EDT FRI AUG 13 2004 THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL POLK COUNTY IN FLORIDA. * UNTIL 215 PM EDT * AT 150 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH DAMAGING WINDS...OVER EASTERN POLK COUNTY...MOVING NORTH AT 20 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT... RURAL EASTERN POLK COUNTY. 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. WIND GUSTS TO 60 MPH WILL CAUSE SOME STRUCTURAL DAMAGE...MAINLY TO TREES AND POWER LINES. POORLY ANCHORED ROOFS...MOBILE HOMES...AND SHEDS ARE ALSO AT RISK. && LAT...LON 2791 8158 2792 8137 2816 8135 2822 8159 $$ 25
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 13, 10:49 AM EDT, 3 hours 1 minute earlier.
Area forecast discussion, Aug 13, 10:49 AM EDT, 3 hours 1 minute before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 1049 AM EDT FRI AUG 13 2004 HURRICANE CHARLEY CONTINUES TO MOVE NORTH UP ALONG THE FLORIDA WEST COAST THIS MORNING. LATEST COORD WITH TPC SHOWS LITTLE OVERALL CHANGE IN THE OVERALL FORECAST TRACK WITH CHARLEY FORECASTED TO AFFECT THE TAMPA BAY AREA BY LATER THIS AFTERNOON INTO EARLY TONIGHT. ONGOING ZONES LOOK GOOD FOR NOW...SO NO MORNING UPDATES PLANNED. WILL UPDATE THE COASTAL MARINE FORECAST SHORTLY WITH ONLY MINOR TWEAKS EXPECTED. && .TBW WATCHES/WARNINGS/ADVISORIES... HURRICANE WARNING IN EFFECT FROM BONITA BEACH TO SUWANNEE RIVER OUT 60NM INCLUDING THE COUNTIES OF LEVY...CITRUS...HERNANDO...PASCO... PINELLAS...HILLSBOROUGH...MANATEE...SARASOTA...CHARLOTTE... DESOTO...AND LEE. INLAND HURRICANE WIND WARNING FOR SUMTER...POLK...HARDEE AND HIGHLANDS COUNTIES. TORNADO WATCH UNTIL 5 PM TODAY FOR PINELLAS...HILLSBOROUGH...POLK... MANATEE...HARDEE...DESOTO...HIGHLANDS...SARASOTA...CHARLOTTE AND LEE COUNTIES. FLOOD WATCH IN EFFECT THROUGH SATURDAY FOR LEVY...CITRUS...SUMTER... HERNANDO...PASCO...PINELLAS...HILLSBOROUGH...POLK...MANATEE... SARASOTA...HARDEE...DESOTO...HIGHLANDS...CHARLOTTE...AND LEE COUNTIES SHORT TERM...JCM LONG TERM...RD
Hazardous weather outlook, Aug 13, 6:34 AM EDT, 7 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 634 AM EDT FRI AUG 13 2004 FLZ039-042-043-048>052-055>057-060>062-065-131520- CHARLOTTE-CITRUS-DE SOTO-HARDEE-HERNANDO-HIGHLANDS-HILLSBOROUGH-LEE- LEVY-MANATEE-PASCO-PINELLAS-POLK-SARASOTA-SUMTER- 634 AM EDT FRI AUG 13 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. ...HURRICANE CHARLEY HEADED FOR THE SUNCOAST TODAY... ...HURRICANE WARNING ARE IN EFFECT FROM BONITA BEACH TO SUWANNEE RIVER INCLUDING TAMPA BAY... .DAY ONE...TODAY: ...SYNOPSIS... HURRICANE CHARLEY WILL CONTINUE MOVING NORTH TOWARD THE WEST COAST OF FLORIDA AND IS EXPECTED TO MAKE LANDFALL THIS EVENING. THE PRIMARY HAZARDS FROM THIS STORM WILL BE WIND DAMAGE...AS WELL AS STORM SURGE OVER AND SOUTH OF WHERE CHARLEY MAKES LANDFALL. HEAVY RAINS AND FLOODING REMAIN A SECONDARY HAZARD...BUT THE SPEED OF THE STORM SHOULD LIMIT THE EXTENT AND AMOUNT OF HEAVY RAINS ON THE SUNCOAST. ...EXPECTED WIND HAZARDS... ON ITS CURRENT TRACK...TROPICAL STORM FORCE WINDS WILL AFFECT SOUTHWEST FLORIDA BY AFTERNOON AND CONTINUE UP THE COAST BY THIS EVENING. SUSTAINED HURRICANE FORCE WINDS AND GUSTS ARE POSSIBLE VERY NEAR WHERE THE CENTER MAKES LANDFALL...ESPECIALLY IN THE EASTERN SEMICIRCLE OF THE STORM. WIDESPREAD MINOR TO MODERATE WIND DAMAGE IS A REAL POSSIBILITY WITH THIS STORM...EVEN WELL INLAND. ...STORM SURGE... THE MOVEMENT OF THE STORM WILL CAUSE THE POTENTIAL FOR A RAPID RISE IN WATER LEVELS ALONG AND TO THE SOUTH OF WHERE THE CENTER CROSSES LAND. THERE IS STILL SOME UNCERTAINTY WHERE EXACTLY THE CENTER WILL CROSS...AS THE POTENTIAL EXISTS FOR THE STORM TO TRACK VERY CLOSE TO THE COAST BEFORE SWINGING INLAND. ...HEAVY RAINS... STORM TOTAL RAINFALL AMOUNTS OF 3 TO 6 INCHES WITH LOCALLY HIGHER AMOUNTS ARE EXPECTED AND WITH THE GROUND ALREADY SATURATED ACROSS PORTIONS OF THE SUNCOAST...ANY ADDITIONAL WIDESPREAD HEAVY RAINS COULD EXACERBATE THE FLOOD POTENTIAL ON RAIN SWOLLEN RIVERS AND LOW LYING OR POOR DRAINAGE AREAS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY: SCATTERED TO NUMEROUS MAINLY AFTERNOON AND EARLY EVENING THUNDERSTORMS ARE EXPECTED EACH DAY. THE PRIMARY THREATS FROM STRONGER CELLS WILL BE FREQUENT CLOUD TO GROUND LIGHTNING AND BRIEF HEAVY DOWNPOURS. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION IS LIKELY TODAY AS CHARLEY SWEEPS UP THE SUNCOAST. && FOR ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB SITE AT HTTP://WWW.SRH.NOAA.GOV/TBW (LOWER CASE) FOR TROPICAL CYCLONE INFORMATION...CHECK OUT HTTP://WWW.NHC.NOAA.GOV PRC
In the hours before
Special weather statement, Aug 13, 7:51 AM EDT, 5 hours 59 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 751 AM EDT FRI AUG 13 2004 FLZ050>052-055>057-060>062-065-GMZ830-853-856-122100- CHARLOTTE-DE SOTO-HARDEE-HIGHLANDS-HILLSBOROUGH-LEE-MANATEE-PINELLAS- POLK-SARASOTA- 751 AM EDT FRI AUG 13 2004 ...TORNADO WATCH NUMBER 749 IN EFFECT UNTIL 500 PM EDT... THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A TORNADO WATCH FOR HILLSBOROUGH...SARASOTA...POLK...HIGHLANDS...HARDEE...DE SOTO... PINELLAS...LEE...CHARLOTTE AND MANATEE COUNTIES. APPROACHING HURRICANE CHARLEY IN THE SOUTHEAST GULF OF MEXICO...COMBINED WITH INCREASING MOISTURE AND WIND SHEAR...WILL CONTINUE TO PRODUCE BANDS OF FAST MOVING SHOWERS AND THUNDERSTORMS ACROSS MUCH OF WEST CENTRAL AND SOUTHWEST FLORIDA. SMALL FAST MOVING TORNADOES WILL BE POSSIBLE THROUGH THIS AFTERNOON. 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) JCM
Special weather statement, Aug 13, 1:50 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 150 PM EDT FRI AUG 13 2004 FLZ039-042-043-048>052-055>057-060>062-065-GMZ830-850-853-856-140600- CHARLOTTE-CITRUS-DE SOTO-HARDEE-HERNANDO-HIGHLANDS-HILLSBOROUGH-LEE- LEVY-MANATEE-PASCO-PINELLAS-POLK-SARASOTA-SUMTER- 150 PM EDT FRI AUG 13 2004 ...TORNADO WATCH NUMBER 750 IN EFFECT UNTIL 200 AM EDT... THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A TORNADO WATCH FOR PASCO...SUMTER...LEVY...CITRUS...HILLSBOROUGH...SARASOTA... HERNANDO...POLK...HIGHLANDS...HARDEE...DE SOTO...PINELLAS...LEE... CHARLOTTE AND MANATEE COUNTIES. MAJOR HURRICANE CHARLEY IS FORECAST TO MAKE LANDFALL ALONG THE FLORIDA WEST COAST LATER THIS AFTERNOON AND THIS EVENING. MULTIPLE BANDS OF CONVECTION AHEAD OF THE HURRICANE WILL CONTINUE TO SPREAD NORTH AND NORTHWESTWARD ACROSS WEST CENTRAL AND SOUTHWEST FLORIDA THROUGH TONIGHT. INCREASING WIND SHEAR AND INSTABILITY WITHIN THESE BANDS WILL INCREASE THE THREAT OF SMALL FAST MOVING TORNADOES WITHIN THE WATCH AREA THROUGH THE PERIOD. 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) JCM
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 1:39 AM EDT | Special Marine Warning | TBW | 51 min | |
| Aug 13, 2:47 AM EDT | Special Marine Warning | TBW | 58 min | |
| Aug 13, 4:02 AM EDT | Special Marine Warning | TBW | 58 min | |
| Aug 13, 4:02 AM EDT | Special Marine Warning | TBW | 58 min | |
| Aug 13, 5:00 AM EDT | Special Marine Warning | TBW | 60 min | |
| Aug 13, 11:52 AM EDT | Tornado Warning | TBW | Hardee, Highlands | 23 min |
| Aug 13, 12:21 PM EDT | Tornado Warning | TBW | Highlands | 24 min |
| Aug 13, 12:47 PM EDT | Tornado Warning | TBW | Polk | 28 min |
| Aug 13, 1:15 PM EDT | Tornado Warning | TBW | Highlands, Polk | 30 min |
| Aug 13, 1:57 PM EDT | Tornado Warning | TBW | Polk | 33 min |
| Aug 13, 2:10 PM EDT | Tornado Warning | TBW | Sumter | 35 min |
| Aug 13, 2:49 PM EDT | Tornado Warning | TBW | DeSoto | 26 min |
| Aug 13, 3:12 PM EDT | Tornado Warning | TBW | DeSoto, Hardee | 33 min |
| Aug 13, 3:14 PM EDT | Tornado Warning | TBW | Highlands | 31 min |
| Aug 13, 3:23 PM EDT | Special Marine Warning | TBW | 67 min | |
| Aug 13, 3:27 PM EDT | Tornado Warning | TBW | Manatee, Sarasota | 33 min |
| Aug 13, 3:41 PM EDT | Tornado Warning | TBW | Hardee, Highlands | 34 min |
| Aug 13, 4:01 PM EDT | Tornado Warning | TBW | Polk | 29 min |
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.