Alert archive / Florida / Tornado Warnings in 1998
Tornado Warning 30, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this tornado warning at Feb 19, 1998, 8:22 PM EST for Hillsborough County, Pasco County, Florida. It was in force for 48 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
- Feb 19, 1998, 8:22 PM EST (01:22 UTC)
- Expired
- Feb 19, 1998, 9:10 PM EST
- In force
- 48 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
Counties Hillsborough County, FL, Pasco County, FL
The radar
The Tampa radar (KTBW), 45 km from the middle of the area, began a volume at 01:26 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 |
|---|---|---|---|
| Feb 19, 8:29 PM EST | Thunderstorm Wind | Tampa, FL | Thunderstorm winds downed several power lines in Thonotosassa. |
| Feb 19, 9:00 PM EST | Thunderstorm Wind | Zephyrhills, FL | Thunderstorm winds downed several large limbs and power lines along State Road 52 near San Antonio. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 19, 4:00 PM EST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 00:00Z, 1.4 hours before the alert went out and 45 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
- 762 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 786 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- 267 m²/s²
- 0-3 km storm-relative helicity
- 289 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 7.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTBW 200122 RRA TORTBW FLC057-101-200210- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 822 PM EST THU FEB 19 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A...TORNADO WARNING EFFECTIVE UNTIL 910 PM EST FOR ...EASTERN PASCO COUNTY ...NORTHERN HILLSBOROUGH COUNTY AT 820 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A DEVELOPING TORNADO OVER NORTHWEST HILLSBOROUGH COUNTY NEAR LUTZ AND LAND O LAKES. THIS TORNADO IS MOVING NORTHEAST AT 35 MPH AND WILL REACH NEAR WESLEY CHAPEL...IN PASCO COUNTY...BY 830 PM EST...AND NEAR DADE CITY BY 845 PM EST. A DOPPLER RADAR DETECTED TORNADO MEANS THAT THERE IS STRONG ROTATION WITHIN A STORM. THE STORM MANY NOT BE PRODUCING A TORNADO AT THE MOMENT...BUT WILL LIKELY DURING THE WARNING PERIOD. THE STORM MAY ALSO INCLUDE HAIL AND DAMAGING STRAIGHT LINE WIND. THOSE IN THE PATH OF THE STORM ARE ADVISED TO TAKE COVER IMMEDIATELY.
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 Feb 19, 7:15 PM EST, 1 hour 7 minutes earlier.
Area forecast discussion, Feb 19, 7:15 PM EST, 1 hour 7 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY-RUSKIN, FL 715 PM EST THU FEB 19 1998 CONVECTION OVR CNTRL/NRN FA ASSOCIATED WITH MESOSCALE/SYNOPTIC SCALE BNDRYS COMBINED WITH UPR JET AND UPR DIVERGENCE. ADDITIONAL ACTIVITY OFFSHORE IN ADVANCE OF SFC FNT. NHC PLOTS SFC BNDRY ACRS SRN FL WHICH MAY TRIGGER ACTIVITY OVR THE SRN FA. EXPECT SHOWERS AND THUNDERSTORMS TO CONTINUE OVR THE FA OVERNIGHT AS THE FNT APPROACHES THE FA AND THE UPR DYNAMICS REMAIN SOMEWHAT. CONVECTION WL END NW TO SE AFTER FROPA FRI. CURRENT FCST REASONABLE. 11
In the hours before
Special weather statement, Feb 19, 4:05 PM EST, 4 hours 17 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-200150- WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 405 PM EST THU FEB 19 1998 ...SLIGHT RISK FOR SEVERE THUNDERSTORMS ACROSS CENTRAL FLORIDA... ...ANOTHER ROUND OF WET WEATHER FOR MOST OF WEST-CENTRAL AND SOUTHWEST FLORIDA THIS EVENING AND OVERNIGHT... ANOTHER STORM SYSTEM WILL BE RACING ACROSS THE GULF COAST OVERNIGHT AND IN THE PROCESS SPAWN ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS ACROSS THE REGION. AS THE SYSTEM APPROACHES...IT WILL DRAG A WARM FRONT NORTHWARD INTO CENTRAL FLORIDA...GENERALLY FROM ABOUT TAMPA TO MELBOURNE. WIDESPREAD RAIN AND THUNDERSTORMS WILL OCCUR MAINLY ALONG AND NORTH OF THIS WARM FRONT BEGINNING EARLY THIS EVENING. RAINFALL AMOUNTS WILL GENERALLY AVERAGE ABOUT 1 INCH. IN ADDITION...THERE IS A SMALL RISK OF SEVERE WEATHER ALONG AND WITHIN ABOUT 40 MILES OF THE FRONT. ANY SEVERE WEATHER WOULD BE IN THE FORM OF STRONG WIND GUSTS...HAIL AND POSSIBLY AN ISOLATED TORNADO. LOCALIZED AREAS WHICH GET HEAVIER THUNDERSTORMS MAY RECIEVE NEAR 2 INCHES OF RAINFALL...AND GIVEN THE ALREADY SATURATED GROUND...THIS WILL AGGRAVATE THE FLOODING PROBLEMS ALONG RIVERS AND IN LOW-LYING AND POOR DRAINAGE AREAS. FORTUNATELY RAINFALL DURATIONS WILL NOT BE SO LONG TO RESULT IN WIDESPREAD FLOODING. NASH
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 19, 9:44 PM EST | Severe Thunderstorm Warning | TBW | Pinellas | 51 min |
| Feb 19, 9:53 PM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Manatee | 47 min |
| Feb 19, 10:48 PM EST | Severe Thunderstorm Warning | TBW | Manatee | 47 min |
| Feb 19, 10:54 PM EST | Severe Thunderstorm Warning | TBW | Polk | 46 min |
| Feb 20, 12:14 AM EST | Severe Thunderstorm Warning | TBW | Hillsborough | 66 min |
| Feb 20, 1:25 AM EST | Flash Flood Warning | TBW | Hillsborough, Pinellas | 4 hr |
| Feb 20, 2:10 AM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Manatee | 30 min |
| Feb 20, 2:20 AM EST | Tornado Warning | TBW | Hillsborough | 30 min |
Nearby
Tornado Warnings in Florida, 1998Every tornado warning in 1998Tornadoes in 1998
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.