Alert archive / Florida / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 31, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Feb 19, 1998, 10:48 PM EST for Manatee County, Florida. It was in force for 47 min. 1 report 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, 10:48 PM EST (03:48 UTC)
- Expired
- Feb 19, 1998, 11:35 PM EST
- In force
- 47 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
County Manatee County, FL
The radar
The Tampa radar (KTBW), 26 km from the middle of the area, began a volume at 03:51 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, 10:55 PM EST | Thunderstorm Wind | Ellenton, FL | Thunderstorm wind severely damaged a mobile home and downed a few trees in Ellenton along U.S. Highway 301. |
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, 9:00 PM EST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 00:00Z, 3.8 hours before the alert went out and 26 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Feb 19, 7:15 PM EST, 3 hours 33 minutes earlier.
Area forecast discussion, Feb 19, 7:15 PM EST, 3 hours 33 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
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 19, 8:22 PM EST | Tornado Warning | TBW | Hillsborough, Pasco | 48 min |
| 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, 10:54 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
Severe Thunderstorm Warnings in Florida, 1998Every severe thunderstorm warning 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.