Alert archive / Florida / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 77, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at May 19, 1999, 4:27 PM EDT for Polk County, Florida. It was in force for 48 min. 6 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
- May 19, 1999, 4:27 PM EDT (20:27 UTC)
- Expired
- May 19, 1999, 5:15 PM EDT
- In force
- 48 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
County Polk County, FL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 19, 4:45 PM EDT | Thunderstorm Wind | Lakeland, FL | The public reported that thunderstorm winds downed a large 30 to 40 foot oak tree and toppled a few metal sheds near the intersection of Ewell and Lunn Roads. |
| May 19, 4:47 PM EDT | Tornado F0 | Lakeland, FL | The public reported a tornado sporadically touched down and partially tore off the roof of a mobile home, snapped or uprooted between 15 and 20 pine and orange trees and severely damaged a few sheds before it lifted and dissipated. |
| May 19, 4:55 PM EDT | Hail 0.75 | Lakeland, FL | Television broadcast media reported that dime sized hail occurred near the intersection of County Road 37B and the Polk County Parkway in Lakeland. |
| May 19, 4:59 PM EDT | Hail 1.75 | Lakeland, FL | Golfball sized hail was reported by the public through the broadcast media in Lakeland. |
| May 19, 5:19 PM EDT | Hail 0.88 | Bartow, FL | Nickel sized hail was reported by FAA control tower personnel at the Bartow Municipal Airport. |
| May 19, 5:20 PM EDT | Thunderstorm Wind | Lakeland, FL | A Skywarn Spotter reported that thunderstorm winds downed three to four large trees near the intersection of Medulla and County LIne Roads. |
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
Cape Canaveral, FL (KXMR), launched 12:00Z, 8.5 hours before the alert went out and 131 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
- 372 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1258 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 1:45 PM EDT | Severe Thunderstorm Warning | TBW | Sarasota | 45 min |
| May 19, 5:15 PM EDT | Severe Thunderstorm Warning | TBW | Polk | 45 min |
| May 19, 5:21 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough | 49 min |
| May 19, 6:10 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough | 35 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1999Every severe thunderstorm warning 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.