Alert archive / Florida / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 61, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 19, 2002, 1:31 PM EDT for Pinellas County, Florida. It was in force for 29 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 19, 2002, 1:31 PM EDT (17:31 UTC)
- Expired
- Aug 19, 2002, 2:00 PM EDT
- In force
- 29 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Counties, with a storm outline in the text
County Pinellas County, FL
The radar
The Tampa radar (KTBW), 34 km from the middle of the area, began a volume at 17:33 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
Tampa Bay, FL (KTBW), launched 12:00Z, 5.5 hours before the alert went out and 34 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
- 1782 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 814 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
674 WUUS52 KTBW 191731 SVRTBW FLC103-191800- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 130 PM EDT MON AUG 19 2002 THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN PINELLAS COUNTY IN FLORIDA. * UNTIL 200 PM EDT * AT 129 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS...OVER SEMINOLE...MOVING SOUTH AT 5 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT... SEMINOLE. LEALMAN. KENNETH CITY. TREASURE ISLAND. AT 125 PM EDT...THE PUBLIC ALSO REPORTED GOLF BALL SIZE WITH THIS STORM OVER PINELLAS PARK. 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. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY. DO NOT USE ELECTRICAL APPLIANCES OR TELEPHONES. && LAT...LON 2794 8267 2789 8287 2765 8281 2772 8257 $$ 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 19, 9:30 AM EDT, 4 hours 1 minute earlier.
Area forecast discussion, Aug 19, 9:30 AM EDT, 4 hours 1 minute before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 930 AM EDT MON AUG 19 2002 LATEST LAPS STREAMLINE ANALYSIS PLACES THE SFC RIDGE AXIS JUST NORTH OF THE LAKE EARLY THIS MORNING WITH SFC OBS INDICATING A LIGHT SELY FLOW ACROSS MY SRN ZONES...NEAR CALM CENTRAL...AND LIGHT S-SWLY TO THE NORTH. POSITION OF RIDGE AXIS WILL FAVOR AN EARLY ONSET TO THE WEST COAST SEA BREEZE TODAY...MOVING INLAND FASTER TO THE NORTH AND HANGING CLOSER TO THE COAST AS ONE MOVES SOUTH. 12Z RAOB DATA INDICATES FAIRLY UNIFORM PWS (2) THROUGHOUT...SO SHOULD SEE ANOTHER ROUND OF SHOWERS/STORMS THIS AFTERNOON AS MESO- SCALE BOUNDARY INTERACTIONS TAKE PLACE. WEAK AND CHAOTIC STEERING FLOW CENTRAL AND SOUTHERN ZONES WILL FAVOR STORMS PROPAGATING ALONG SEA/LAKE/OUTFLOW BOUNDARIES...WHILE FURTHER NORTH A SLIGHTLY BETTER SW-WLY STEERING WILL PUSH CONVECTION TOWARD INLAND LOCATIONS. IN ADDITION SLOW MOVING CELLS WILL FAVOR LOCALLY HEAVY RAINS. ONGOING ZONES SEEM TO HAVE A GOOD HANDLE ON THIS SO NO UPDATES ARE PLANNED. MARINE...SFC RIDGE POSITION WILL SUPPORT LIGHT AND VARIABLE WINDS AND SLIGHT SEAS OVER THE COASTAL WATERS THIS AFTERNOON. OTHER THAN MINOR WIND WORDING ADJUSTMENTS TO FIT THE AFTERNOON...NO CHANGES EXPECTED. .TBW...NONE. MCMICHAEL
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 1:06 PM EDT | Severe Thunderstorm Warning | TBW | Pinellas | 24 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2002Every severe thunderstorm warning in 2002
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.