Alert archive / Florida / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 152, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 2, 1998, 3:51 PM EDT for Hillsborough County, Polk County, Florida. It was in force for 24 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
- Jul 2, 1998, 3:51 PM EDT (19:51 UTC)
- Expired
- Jul 2, 1998, 4:15 PM EDT
- In force
- 24 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
Counties Hillsborough County, FL, Polk County, FL
The radar
The Tampa radar (KTBW), 45 km from the middle of the area, began a volume at 19:55 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 2, 4:15 PM EDT | Hail 1 | Bradley Jct, FL |
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, 7.9 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
- 1868 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1007 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- -9 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.
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 Jul 2, 2:30 PM EDT, 1 hour 21 minutes earlier.
Area forecast discussion, Jul 2, 2:30 PM EDT, 1 hour 21 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY-RUSKIN, FL 230 PM EDT THU JUL 2 1998 CURRENTLY...WESTERLY SFC WIND NOT DEVELOPING AS STRONG AND AS QUICKLY AS PREV THOUGHT. IN FACT...WC SEABRZ NOW JUST BEGINNING TO DEVELOP WITH SHWS/TSTMS FORMING OVER SARASOTA CO. WITH LIGHTER FLOW...A BIT MORE CONCERNED THAT COVERAGE OF ACTIVITY WILL BE A LITTLE HIGHER AND CLOSER TO WEST COAST BEFORE FINALLY MOVING INLAND LATER TODAY. SAT SOUNDER DATA GIVES WIND GUST POTENTIAL OF 35-45 KTS TODAY...WHICH WILL LIKELY OCCUR WITH STRONGER STORMS THIS AFTN. FCST...DEEP RDG BLDS MORE OVER THE CENT GULF BY FRI...VEERING WINDS BOTH AT THE SFC AND ALOFT TO MORE NW. OVERALL MOISTR AND INSTABILITY WILL CHANGE LITTLE THRU THE PERIOD...BUT WITH TEMPS REACHING THE LO- MID 90S AND SFC TDS IN THE MID-UPR 70S...IT BECOMES REALLY TOUGH TO KEEP CHCS FOR RAIN MUCH LOWER THAN CLIMO. WITH LITTLE FORCING ALOFT FOR PRECIP...WILL CONTINUE TO BE A MESOSCALE FORECAST WITH CONVECTION FOCUSED ALONG SEABRZ/OUTFLOW BOUNDARIES. TONIGHT...SFC WESTERLY FLO NOT PROGD TO BE AS STRONG. IN FACT...FWC SHOWING LANDBRZ FOR TPA. THERFORE...THINK TEMPS A TAD COOLER FOR COASTAL AREAS TONIGHT THAN LAST NIGHT...BUT STILL UPR 70S TO NEAR 80. FOR FRI...SLIGHTLY MORE NW STEERING FLOW MAY KEEP WC SEABRZ A BIT CLOSER TO COAST EARLIER IN THE DAY. THINK 30 POP LOOKS REASONABLE...STARTING ALONG THE COAST BY LATE MORNING/EARLY AFTN...THEN MOVING INLAND. FRI NIGHT...AGAIN NOT AS WARM AS ITS BEEN...AS WINDS TURN TO LANDBRZ LATER AT NIGHT. BY SAT... LITTLE CHANGE WITH AFTN SEABRZ WORKING SLOWLY INLAND. EXPECT 30-40 POP SHUD COVER IT. NOTE: WITH HOLIDAY WEEKEND COMING...WILL KEEP EYE ON HEAT INDICES. THEY HAVE BEEN RUNNIN>G AROUND 105 MOST PLACES IT SEEMS FOR PAST MONTH. CURRENTLY...ITS MARGINAL TO ISSUE HEAT ADVISORY...BUT WILL USE HWO AND NOWCASTS TO HIGHLIGHT. THANKS MIA FOR COORD/DISC. MORALES
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 3:00 PM EDT | Severe Thunderstorm Warning | TBW | Manatee, Sarasota | 45 min |
| Jul 2, 4:22 PM EDT | Severe Thunderstorm Warning | TBW | Polk | 33 min |
| Jul 2, 5:12 PM EDT | Severe Thunderstorm Warning | TBW | Lee | 48 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.