Alert archive / Florida / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 76, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Sep 4, 2000, 4:50 PM EDT for Polk County, Florida. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 4, 2000, 4:50 PM EDT (20:50 UTC)
- Expired
- Sep 4, 2000, 5:30 PM EDT
- In force
- 40 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
County Polk County, FL
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 12:00Z, 8.8 hours before the alert went out and 74 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
- 211 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 1204 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS52 KTBW 042051 SVRTBW FLC105-042130- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 450 PM EDT MON SEP 4 2000 THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN POLK COUNTY. * UNTIL 530 PM EDT. * AT 450 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS...OVER EAGLE LAKE JUST SOUTH OF WINTER HAVEN...MOVING NORTH AT 10 MPH. OTHER STROMG THUNDERSTORMS ARE RAPIDLY DEVELOPING OVER POLK COUNTY AND ARE ALSO CAPABLE OF DEVELOPING STRONG WINDS AND HAIL. * THE SEVERE THUNDERSTORM WILL AFFECT... R CYPRESS GARDENS. AUBURNDALE. LAKE ALFRED. HAINES CITY. $$ LAT...LON 2795 8191 2793 8164 2822 8157 2829 8187 15 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 Sep 4, 1:50 PM EDT, 3 hours earlier.
Area forecast discussion, Sep 4, 1:50 PM EDT, 3 hours before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 150 PM EDT MON SEP 4 2000 CURRENTLY: GULF COAST SEA BREEZE BOUNDARY MOVING SLOWLY INLAND...AND CONVECTION IS STARTING TO BLOSSOM ALONG IT. BEST COVERAGE...SIMILAR TO SUNDAY...IS OVER THE SOUTHWEST COUNTIES WHERE THE BOUNDARY HAS REMAINED CLOSEST TO THE COAST. EVENTUALLY THAT WIDER COVERAGE SHOULD SHIFT NORTHWARD. FORECAST: LOOKS LIKE PATTERN WILL REMAIN LOCKED IN FOR ONE MORE DAY...SO A NEAR REPEAT OF THIS WEEKENDS WEATHER IS IN STORE TUESDAY. BEST CHANCES OF RAIN BEFORE NOON WILL BE ALONG THE COAST NORTH OF TAMPA BAY...WHILE THE EMPHASIS WILL SHIFT INLAND DURING THE AFTERNOON AS THE GULF COAST SEA BREEZE MOVES INLAND AND DAYTIME HEATING HAS ITS WAY. WILL PROBABLY BE ANOTHER LOCAL CONVECTION MINIMUM IN THE IMMEDIATE TAMPA BAY AREA. THINGS BEGIN TO TRANSITION BY TUESDAY NIGHT. MODELS CONSISTENT IN SHOWING THE INFLUENCE OF THE PERSISTENT SURFACE TROF WILL WEAKEN... AND WINDS SHOULD BE OFFSHORE EVERYWHERE BY WEDNESDAY MORNING. THIS SHOULD HELP LIMIT THE MORNING CONVECTION ALONG THE NATURE COAST. BY WEDNESDAY AFTERNOON...BOTH ETA AND AVN INSIST THE GULF SEA BREEZE WILL BE HELD CLOSE TO THE COAST BY SYNOPTIC SOUTHEASTERLIES... MEANING A SHIFT TOWARD LATER IN THE AFTERNOON FOR THE BEST CHANCE OF CONVECTION. THEY ALSO BRING SOME INCREASING MOISTURE FROM THE WESTERN CARIBBEAN LATER IN THE DAY...COINCIDING WITH THE BEST SURFACE CONVERGENCE. WILL HOLD ON TO GOOD CHANCE POPS FOR WEDNESDAY WITH AN EMPHASIS ON AFTERNOON TIMING CENTRAL AND SOUTH. THERE WILL STILL BE ENOUGH WEAKNESS IN THE PRESSURE PATTERN OVER THE NORTHERN CWA TO ALLOW FOR AN EARLIER SEA BREEZE...AND HENCE AN EARLIER THREAT OF THUNDERSTORM DEVELOPMENT. WILL AVOID TIMING ISSUES THERE. MARINE: WILL SLOWLY BACK WINDS BY THE MIDDLE OF THE WEEK...WITH ONSHORE SEA BREEZE CIRCULATION TAKING ON MORE IMPORTANCE NEAR THE COAST IN THE AFTERNOON AND EVENING HOURS. WILL BACK OFF A BIT ON WINDS IN EXTENDED AND KEEP THEM OUT OF THE SOUTHEAST AS THE NEW MODELS ARE LESS AGGRESSIVE WITH HIGH PRESSURE TRYING TO BUILD IN FROM THE NORTH LATE IN THE WEEK. EXTENDED: WILL BACK OFF ON DRYING AND COOLING FOR END OF WEEK CURRENTLY REFLECTED IN EFP. WILL GO MORE TOWARD SOUTHEAST FLOW CLIMATOLOGY FOR LATE SUMMER. PRELIM NUMBERS: TPA 77/90/77/91 2425 FMY 76/91/75/92 2525 .TBW...NONE. ALSHEIMER
Nearby
Severe Thunderstorm Warnings in Florida, 2000Every severe thunderstorm warning in 2000
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.