Alert archive / Florida / Tornado Warnings in 1999
Tornado Warning 7, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this tornado warning at Apr 30, 1999, 8:25 AM EDT for Manatee County, Sarasota County, Florida. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 30, 1999, 8:25 AM EDT (12:25 UTC)
- Expired
- Apr 30, 1999, 9:00 AM EDT
- In force
- 35 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
Counties Manatee County, FL, Sarasota County, FL
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 12:00Z, 0.4 hours before the alert went out and 42 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
- 184 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 570 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
999 WFUS1 KTBW 301227 RRA TORTBW FLC081-115-301300- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 825 AM EDT FRI APR 30 1999 THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A * TORNADO WARNING FOR... WESTERN MANATEE COUNTY IN WEST CENTRAL FLORIDA WESTERN SARASOTA COUNTY IN WEST CENTRAL FLORIDA * UNTIL 900 AM EDT * AT 825 AM...A TORNADO WAS INDICATED BY NATIONAL WEATHER SERVICE DOPPLER RADAR NEAR THE NORTH END OF LONGBOAT KEY. A WATERSPOUT WAS CONFIRMED BY SPOTTERS OFFSHORE OF COQUINA BEACH AT 820 AM. PERSONS ON LONGBOAT KEY SHOULD TAKE COVER NOW. MOVEMENT WAS SOUTHEAST AT 20 MPH. A DOPPLER RADAR DETECTED TORNADO MEANS A TORNADO MAY NOT BE OCCURRING AT THE MOMENT...BUT WILL LIKELY DO SO DURING THE WARNING PERIOD. TAKE COVER IN A STURDY BUILDING. MOBILE HOMES AND CARS ARE NOT SAFE. PAYLOR/ZALESKI
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Apr 30, 3:51 AM EDT, 4 hours 34 minutes earlier.
Area forecast discussion, Apr 30, 3:51 AM EDT, 4 hours 34 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY-RUSKIN FL 351 AM EDT FRI APR 30 1999 ,CURRENTLY...FEW LOW AND HI CLOUDS MOVING ACROSS NORTH HALF FA AHEAD OF COLD FRONT NEAR GNV AT 03Z WITH SFC LOW OFF NE FL. .DISCUSSION...MODELS CLOSE BUT FAVOR NGM WHICH GIVES SLIGHTLY MORE PCPN THAN ETA. OMEGA BLOCK TO CONT WITH H5 LOW IN MID ATLANTIC STATES DROPPING SOUTH TODAY AND THEN SHIFTING OFFSHORE THE GA/FL BORDER TONIGHT AND THEN MERGING WITH TROF ALONG EAST U.S. COAST. FRONT TO SLIDE SOUTH OVER FA TODAY AS HIGH BUILDS INTO MIDWEST. WOULD EXPECT TO SEE INCREASING CLOUDS ALONG WITH SCT RW/TSTMS AHEAD OF FRONT WITH LINGERING CLOUDS AMD RAIN BEHIND. LOW OFF FL STNRY WILL HELP KEEP WINDS UP...IN BRISK/BREEZY RANGE INTO SAT MORNING. FWC TEMPS HAVE GENERALLY BEEN GOOD BUT WOULD REDUCE THEM 2-4 DEG. BKV 72/53/75/54 310 TPA 76/57/77/55 310 LAL 75/55/75/53 310 FMY 80/65/80/63 320 09
In the hours before
Special weather statement, Apr 30, 5:35 AM EDT, 2 hours 50 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-302136- WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 535 AM EDT FRI APR 30 1999 ...NO HAZARDOUS WEATHER EXPECTED AROSS WEST CENTRAL AND SOUTHWEST TODAY... A COLD FRONT ACROSS NORTH CENTRAL FLORIDA THIS MORNING WILL MOVE DOWN THE STATE TODAY...WITH SCATTERED SHOWERS AND A FEW POSSIBLE THUNDERSTORMS IN ADVANCE OF IT. SOME PATCHY LIGHT RAIN MAY LINGER IN THE FRONTS WAKE BUT OTHERWISE THE POSSIBILITY FOR RAINFALL OVER THE AREA WILL END WHEN THE FRONT MOVES INTO SOUTH FLORIDA TONIGHT. 09
Special weather statement, Apr 30, 5:35 AM EDT, 2 hours 50 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-302136- WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 535 AM EDT FRI APR 30 1999 ...NO HAZARDOUS WEATHER EXPECTED AROSS WEST CENTRAL AND SOUTHWEST TODAY... A COLD FRONT ACROSS NORTH CENTRAL FLORIDA THIS MORNING WILL MOVE DOWN THE STATE TODAY...WITH SCATTERED SHOWERS AND A FEW POSSIBLE THUNDERSTORMS IN ADVANCE OF IT. SOME PATCHY LIGHT RAIN MAY LINGER IN THE FRONTS WAKE BUT OTHERWISE THE POSSIBILITY FOR RAINFALL OVER THE AREA WILL END WHEN THE FRONT MOVES INTO SOUTH FLORIDA TONIGHT. 09
Nearby
Tornado Warnings in Florida, 1999Every tornado warning in 1999Tornadoes in 1999
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.