Alert archive / Florida / Tornado Warnings in 1999
Tornado Warning 14, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this tornado warning at Jul 9, 1999, 12:55 PM EDT for Pinellas County, Florida. It was in force for 35 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 9, 1999, 12:55 PM EDT (16:55 UTC)
- Expired
- Jul 9, 1999, 1:30 PM EDT
- In force
- 35 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
County Pinellas County, FL
The radar
The Tampa radar (KTBW), 40 km from the middle of the area, began a volume at 16:59 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 9, 1:00 PM EDT | Hail 1 | Dunedin, FL | Quarter sized hail was reported on Mira Vista Drive near Alternate U.S. Highway 19 by a Hillsborough County Emergency Coordinator. |
| Jul 9, 1:00 PM EDT | Thunderstorm Wind | Dunedin, FL | Thunderstorm winds downed two large trees and several large branches along Mira Vista Drive near Alternate U.S. Highway 19 in Dunedin. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 12:00Z, 4.9 hours before the alert went out and 40 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
- 725 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 1121 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
335 WFUS1 KTBW 091656 RRA TORTBW FLC103-091730- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 1255 PM EDT FRI JUL 9 1999 THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A * TORNADO WARNING FOR... WESTERN PINELLAS COUNTY IN WEST CENTRAL FLORIDA * UNTIL 130 PM EDT * AT 1255 PM...A TORNADO WAS REPORTED BY SKYWARN SPOTTERS JUST NORTH OF THE COURTNEY CAMPBELL PARKWAY. MOVEMENT WAS TO THE NORTH AROUND 5 PM. A TORNADO HAS BEEN CONFIRMED TAKE COVER IN A STURDY BUILDING NOW MOBILE HOMES AND CARS ARE NOT SAFE.
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 Jul 9, 10:15 AM EDT, 2 hours 40 minutes earlier.
Area forecast discussion, Jul 9, 10:15 AM EDT, 2 hours 40 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY-RUSKIN, FL 1015 AM EDT FRI JUL 9 1999 FEW TSRA FIRING OFF THE LAND BREEZE ABOUT 20NM OFFSHORE THIS MORNING WHILE MUCH BIGGER COMPLEX FROM UPPER LOW ABOUT 100NM OFFSHORE AND QUICKLY EXPANDING NORTH. H70 FLOW IS AROUND 10 TO 15 KTS WITH DIRECTIONS FROM THE SE IN THE SOUTH...S ACROSS CENTRAL SECTIONS AND MORE SW IN NORTHERN AREAS AS IT ROTATES AROUND A HIGH IN THE BAHAMAS. THINK PERHAPS LEVY IS A BIT UNDERDONE IN POPS THIS AFTERNOON SINCE GULF MOISTURE IS QUICKLY ADVANCING AND WILL UPDATE ALL ZONES TO ADJUST AND CLEAN UP WORDING. MARINE...GULF COMPLEX COULD STIR UP LOCAL COASTAL FORECAST BY THE AFTERNOON HOURS AS 003 OBS INDICATE A SE WIND 18KT AND 4FT SEAS. SUGGEST TWEAKING UP WIND AND SEAS A CAT. 67/GARRARD
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 1:37 PM EDT | Severe Thunderstorm Warning | TBW | Pinellas | 33 min |
| Jul 9, 2:11 PM EDT | Severe Thunderstorm Warning | TBW | Pinellas | 34 min |
| Jul 9, 2:16 PM EDT | Severe Thunderstorm Warning | TBW | Manatee | 49 min |
| Jul 9, 2:31 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough | 44 min |
| Jul 9, 2:32 PM EDT | Tornado Warning | TBW | Manatee | 28 min |
| Jul 9, 3:07 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough | 48 min |
| Jul 9, 3:11 PM EDT | Tornado Warning | TBW | Manatee | 34 min |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.