Alert archive / Florida / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 17, NWS Tampa Bay, FL

March 30, 2001Highlands County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Mar 30, 2001, 4:09 AM EST for Highlands County, Florida. It was in force for 21 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: Mar 30, 2001, 4:09 AM EST (09:09 UTC)
Expired: Mar 30, 2001, 4:30 AM EST
In force: 21 min
Issued by: NWS Tampa Bay, FL
Area: Whole counties

County Highlands County, FL

The radar

The Melbourne radar (KMLB), 109 km from the middle of the area, began a volume at 09:12 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
Mar 30, 4:11 AM EST	Hail 0.88	Sebring, FL	Nickel sized hail was reported by a Skywarn Spotter one mile east of Sebring.

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 00:00Z, 9.2 hours before the alert went out and 112 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -198 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS52 KTBW 300909
SVRTBW
FLC055-300930-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
409 AM EST FRI MAR 30 2001

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN HIGHLANDS COUNTY IN FLORIDA.

* UNTIL 430 AM EST.

* AT 408 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH DAMAGING WINDS...OVER SEBRING...MOVING
  EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  SEBRING.

THIS IS A DANGEROUS STORM MOVE INTO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING...AWAY FROM WINDOWS. COVER YOUR HEAD WITH
PILLOWS OR CUSHIONS.

WIND GUSTS TO 60 MPH WILL CAUSE SOME STRUCTURAL DAMAGE...MAINLY TO
TREES AND POWER LINES. POORLY ANCHORED ROOFS...MOBILE HOMES...AND
SHEDS ARE ALSO AT RISK.

QUARTER SIZE HAIL IS LIKELY. MOVE INDOORS IMMEDIATELY.

$$

LAT...LON 2758 8152 2740 8150 2742 8112 2751 8118
          2760 8114

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 Mar 30, 3:18 AM EST, 51 minutes earlier.

Area forecast discussion, Mar 30, 3:18 AM EST, 51 minutes before

WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
318 AM EST FRI MAR 30 2001

BUSY NIGHT CONTINUING ACROSS THE CWFA...BUT THE BIG STORY IS MUCH
NEEDED RAIN (THOUGH A BIT TOO MUCH TOO QUICKLY) HAS FALLEN IN AREAS
THAT NEEDED IT MOST.  A PNS WILL BE SENT TOWARDS DAWN WITH SEVERAL
LOCATIONS NUMBERS.

WILL KEEP DISC BRIEF SINCE ACTIVITY CONTINUES ACROSS THE CENTRAL
ZONES.  H50 SHORT WAVE AND JET IMPULSE WHICH KICKED OFF ROUND 2 ARE
RACING THROUGH ATTM...AND BACK EDGE OF PCPN ALREADY MAKING ITS
MOVE ON THE COAST.  SKIES ACTUALLY BECOME PTLY CLDY BEHIND THE
ACTIVITY...AND EXPECT SOME SUNSHINE LATER TODAY...ESP CENTRAL AND
N.  UNFORTUNATELY...SW FLOW ALFT COMBINED WITH SFC S/SE FLOW AND
ABUNDANT RH COURTESY OF 18H RAINS SHOULD BE ENUF TO BUBBLE UP AMS
FOR AFTN PCPN TODAY.

TONIGHT...ETA AND AVN DISAGREE A BIT ON MOISTURE...WITH ETA STILL
CARRYING HIGH VALUES AND AVN RELATIVELY DRY.  CONTINUED SW FLOW
WITH MORE SHORT WAVES RUNNING THROUGH IT ARGUES FOR A BIT MORE
CLOUDS AND PCPN PROBS THAN AVN...SO WILL RETAIN A LOW CHC CNTL/S.
FARTHER N...SLIGHT COOLING BUT WITH STILL HIGH DWPTS COULD LEAD TO
FOG...SO WILL ADD PATCHY WORDING.

ON SAT...BOTH ETA AND AVN SHOW PREFRONTAL MEAN RH ENHANCEMENT...AND
ANOTHER ROUND OF DECENT H25 JET DVRGC ONCE AGAIN.  APPEARS THAT
JACKPOT WILL BE CENTRAL AND S AGAIN...AND WILL LEAVE HIGHEST POPS
ACCORDINGLY.

BY SAT NIGHT...THE N SHOULD BEGIN TO DRY OUT...WITH AGAIN SOME
PATCHY FOG.  FARTHER S...SLOW MOVEMENT OF FRONT MAY CONTINUE THREAT
OF PCPN.

EXTENDED:
IF YOU BELIEVE THE AVN...APRIL ARRIVES ON SKED...CLIMATOLOGICALLY AT
LEAST...BY MONDAY.  DEEPENING E U.S. TROUGH WILL PUNCH DRY COOLER
AIR INTO THE REGION...BUT MODIFICATION WILL OCCUR QUICKLY AS H50
RIDGE...AT LONG LAST...BUILDS.  A WARM DRY TREND IS IN STORE BY MID
WEEK.

MARINE:  WINDS ON THE WANE...AS ARE SEAS.  EXPECT A BUMP BACK TO 15
KT TODAY...THEN A DECREASE THRU SAT NIGHT AS TROUGH SLOWLY MOVES
THROUGH.  PERHAPS A BRIEF SURGE BACK TO 15 KT AS CAA MOVES IN SUN
NIGHT...THEN A RETURN TO E WINDS/ONSHORE SEA BREEZES LATER.

FIRE WX:  PLENTY OF SURFACE WETNESS AND CONTINUED HIGH RH MEAN NO
FLAGS FOR THE NEXT TWO DAYS.

PRELIM NUMBERS:
TPA ET 078/064/078/065 4252
FMY WT 081/066/082/066 6454 88

.TBW...NONE.

GOLDSMITH

The office that day

Everything else NWS Tampa Bay, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 30, 2:07 AM EST	Severe Thunderstorm Warning	TBW	Sarasota	23 min
Mar 30, 2:33 AM EST	Severe Thunderstorm Warning	TBW	Sarasota	12 min
Mar 30, 5:35 AM EST	Tornado Warning	TBW	Charlotte, Lee	25 min

Nearby

Severe Thunderstorm Warnings in Florida, 2001 Every 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.