Alert archive / Florida / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 89, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 21, 2001, 5:34 PM EDT for Pasco County, Florida. It was in force for 41 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
- Jun 21, 2001, 5:34 PM EDT (21:34 UTC)
- Expired
- Jun 21, 2001, 6:15 PM EDT
- In force
- 41 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
County Pasco County, FL
The radar
The Tampa radar (KTBW), 67 km from the middle of the area, began a volume at 21:34 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 |
|---|---|---|---|
| Jun 21, 5:39 PM EDT | Hail 0.75 | Wesley Chapel, FL | Dime sized hail was reported by WTVT-TV (FOX) of Tampa in Wesley Chapel over eastern Pasco county. |
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, 9.6 hours before the alert went out and 67 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
- 1342 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 862 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 13 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 212136 SVRTBW FLC101-212215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 534 PM EDT THU JUN 21 2001 THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN PASCO COUNTY IN FLORIDA. * UNTIL 615 PM EDT. * AT 534 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS...OVER CENTRAL PASCO COUNTY. THE STORM WAS DRIFTING SOUTHWEST. * THE SEVERE THUNDERSTORM WILL AFFECT... LAND O' LAKES. WESLEY CHAPEL. SAN ANTONIO. $$ LAT...LON 2836 8247 2818 8246 2819 8221 2837 8221 15 NNNN 3
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 Jun 21, 2:13 PM EDT, 3 hours 21 minutes earlier.
Area forecast discussion, Jun 21, 2:13 PM EDT, 3 hours 21 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 213 PM EDT THU JUN 21 2001 CURRENTLY: ALREADY HAD A STORM WITH GOLF BALL SIZE HAIL THIS AFTERNOON OVER PINELLAS COUNTY. THIS USUALLY MEANS WE WILL SEE ANOTHER SEVERE STORM OR TWO BEFORE THE DAY IS OVER. BEST CHANCE WOULD SEEM TO BE OVER THE INTERIOR CENTRAL AND SOUTHERN COUNTIES WHERE GULF BREEZE AND ATLANTIC BREEZE COMBINE. INSTABILITY IS OBVIOUSLY IN PLACE. FORECAST: 12Z MODELS ALL SHOW REASONABLY SIMILAR EVOLUTIONS TO THE SYNOPTIC PATTERN THROUGH THE WEEKEND. DEEP UPPER TROF OVER THE UPPER MIDWEST THIS AFTERNOON WILL CONTINUE TO AMPLIFY...PARKING ITSELF AS A FULL LATITUDE TROF EXTENDING FROM EASTERN CANADA INTO THE GULF BY SATURDAY. THE MAIN SURFACE RIDGE WILL RETREAT TO THE SOUTH OF THE CWA IN RESPONSE...SETTING UP DEEP SOUTHWESTERLY FLOW LOADED WITH TROPICAL MOISTURE. MAIN QUESTION I AM LEFT WITH IS THE SOURCE AND LOCATION OF MAXIMUM LIFT. DIURNAL CONSIDERATIONS WOULD ARGUE FOR MORNING THROUGH EARLY AFTERNOON ACTIVITY IN COASTAL LOCATIONS WITH THE CONVECTION MOVING INLAND DURING THE REMAINDER OF THE DAY. HOWEVER...STRONG VORT MAX MAY SUPPLY ENOUGH SYNOPTIC LIFT TO KEEP THE THREAT OF THUNDERSTORMS IN THE COASTAL COUNTIES ALL DAY. WILL STAY AWAY FROM SPECIFIC TIMING IN THE COASTAL COUNTIES FOR THESE REASONS. CHANCES OF RAIN ARE ALSO A BIT OF A QUESTION. THEY SHOULD BE GOOD... BUT HOW GOOD. THERE IS A WEAK SURFACE TROF EVIDENT IN THE SURFACE WIND FIELDS OVER APALACHEE BAY THIS AFTERNOON...AND LEADING VORT MAX LIFTING NORTHEAST WILL HELP TO SUPPRESS THE TROF A LITTLE FARTHER TO THE SOUTH. THE EVENTUAL RESTING PLACE OF THAT BOUNDARY WILL BE THE LOCATION OF THE BEST CHANCES FOR RAIN...AND LOCALLY HEAVY RAIN AT THAT. WITH THOSE DETAILS HARD TO DISCERN AT THIS TIME...I WILL BROADBRUSH THE FORECAST AND GO WITH SCATTERED ON FRIDAY AND NUMEROUS ON SATURDAY AS THE MAIN TROF APPROACHES. HOPEFULLY FUTURE MODEL RUNS WILL ALLOW FOR MORE DETAIL IN THE ZONES. MARINE: STILL NO HEADLINES EXPECTED WITH WINDS BECOMING SOUTHWEST EVERYWHERE FOR THE WEEKEND. EXTENDED: FLOW SHOULD TRANSITION BACK AGAIN TO A SOUTHEASTMERLY LOW LEVEL FLOW FOR MOST OF NEXT WEEK...GIVING LATE DAY SHOWERS AND THUNDERSTORMS BACK TO THE COASTAL COUNTIES. PRELIM NUMBERS: TPA 74/90/77/89 3546 FMY 73/92/75/91 4536 .TBW...NONE. ALSHEIMER
In the hours before
Local storm report, Jun 21, 2:23 PM EDT, 3 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
223 PM EDT THU JUN 21 2001
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0114 PM PINELLAS PARK FL .75 INCH HAIL
06/21/01 PINELLAS REPORTED BY BAY NEWS 9.
EVENT DURATION 15
MINUTES.
0114 PM PINELLAS PARK FL 1 INCH HAIL
06/21/01 PINELLAS REPORTED BY PUBLIC.
0116 PM PINELLAS PARK FL LIGHTNING
06/21/01 PINELLAS A 32 YEAR OLD FEMALE
WAS STRUCK BY LIGHTNING
WHILE GRABBING A METAL
CLOSET DOOR KNOB INSIDE
HER HOME. SHE IS
CURRENTLY IN GOOD
CONDITION. REPORTED BY
BAY NEWS 9.
0120 PM PINELLAS PARK FL WIND DAMAGE
06/21/01 PINELLAS TREES WERE DOWNED ON
66TH AND 118TH ST IN
PINELLAS PARK. REPORTED
BY BAY NuEWS 9.
0125 PM PINELLAS PARK FL FUNNEL CLOUD
06/21/01 PINELLAS REPORTED BY EMERGENCY
MANAGEMENT.The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 1:04 PM EDT | Severe Thunderstorm Warning | TBW | Pinellas | 31 min |
| Jun 21, 2:59 PM EDT | Severe Thunderstorm Warning | TBW | Citrus | 31 min |
| Jun 21, 3:16 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough | 29 min |
| Jun 21, 3:55 PM EDT | Severe Thunderstorm Warning | TBW | Highlands | 35 min |
| Jun 21, 4:38 PM EDT | Severe Thunderstorm Warning | TBW | Pasco | 52 min |
| Jun 21, 6:06 PM EDT | Severe Thunderstorm Warning | TBW | Polk | 39 min |
| Jun 21, 6:42 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough | 48 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2001Every severe thunderstorm warning in 2001
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.