Alert archive / Florida / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 9, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at May 31, 2002, 4:13 PM EDT for Hillsborough County, Florida. It was in force for 32 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
- May 31, 2002, 4:13 PM EDT (20:13 UTC)
- Expired
- May 31, 2002, 4:45 PM EDT
- In force
- 32 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
County Hillsborough County, FL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 31, 4:21 PM EDT | Hail 1.75 | Temple Terrace, FL | Dime to Golfball size hail fell in Temple Terrace. |
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, 8.2 hours before the alert went out and 23 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
- 1314 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 877 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
436 WUUS52 KTBW 312013 SVRTBW FLC057-312045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 415 PM EDT FRI MAY 31 2002 THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN HILLSBOROUGH COUNTY IN FLORIDA. * UNTIL 445 PM EDT. * AT 412 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL...OVER TEMPLE TERRACE...MOVING SOUTH AT 5 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT... TEMPLE TERRACE. EAST LAKE ORIENT PARK. SEVERE THUNDERSTORMS CONTAIN WIND GUSTS OF 60 MPH OR HIGHER...AND HAIL THE SIZE OF DIMES OR LARGER. MOVE TO A PLACE OF SAFETY. $$ LAT...LON 2812 8231 2812 8252 2797 8251 2796 8232 88 NNNN
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 May 31, 2:30 PM EDT, 1 hour 43 minutes earlier.
Area forecast discussion, May 31, 2:30 PM EDT, 1 hour 43 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 230 PM EDT FRI MAY 31 2002 CURRENTLY...A WEAK PRESSURE GRADIENT CONTINUES ACROSS THE PENINSULA WITH EAST AND WEST COAST SEA BREEZES PUSHING INLAND. THUNDERSTORMS HAVE DEVELOPED ALONG THE EAST COAST AND ARE MOVING NORTH BUT REDEVELOPMENT OCCURS WESTWARD ALONG OUTFLOW BOUNDARIES. SIGNIFICANT CONVECTION IS SLOW TO DEVELOP ALONG THE WEST COAST. SHORT TERM FORECAST...ACTIVITY WILL DEVELOP JUST INLAND ALONG THE EAST AND WEST COAST SEA BREEZE COLLISION. THUNDERTORMS ARE ALIGHNED NORTH-SOUTH AND ARE DRIFING NORTH. THE SLOW MOVEMENT WILL CAUSE SIGNIFICANT ACCUMULATIONS OF RAIN AND LOCALIZED FLOODING OF LOW LYING AREAS. SOME STORMS MAY PRODUCE HAIL AND STRONG WINDS. LONGER TERM... SURFACE GRADIENT REMAINS LIGHT WITH RIDGE OVER GULF. MID-UPPER LOW OVER GULF SLOWLY WEAKENS AS DOES UPPER JET. MID LEVEL TEMPS WARM SLIGHTLY OVER THE NEXT FEW DAYS. WILL SETTLE INTO MORE TYPICAL SUMMER PATTERN NEXT WEEK WITH AFTERNOON SEA BREEZES AND RELATED CONVECTIVE ACTIVITY. MARINE...VERY WEAK PRESSURE PATTERN CONTINUES WITH VARIABLE WINDS IN THE 5-10 KNOT WITH AN ONSHORE SEA BREEZE COMPONENT EXPECTED ALONG THE COAST EACH AFTERNOON THE NEXT SEVERAL DAYS. NO HIGHLIGHTS EXPECTED. FIRE WEATHER...NO CONCERNS TODAY OR SATURDAY AS RH VALUES REMAIN WELL ABOVE WATCH/RED FLAG CRITERIA. BKV TB 090/068 091/067 091 57533 TPA EB 090/073 091/074 090 57433 GIF TT 090/072 091/072 092 57735 SRQ EB 087/073 088/073 088 57433 FMY EB 091/072 092/073 090 57433 .TBW...NONE.
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 5:20 PM EDT | Severe Thunderstorm Warning | TBW | Pasco | 25 min |
| May 31, 5:45 PM EDT | Severe Thunderstorm Warning | TBW | Pasco | 15 min |
| May 31, 6:03 PM EDT | Severe Thunderstorm Warning | TBW | Pasco, Polk | 27 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2002Every severe thunderstorm warning in 2002
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.