Alert archive / Florida / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 64, NWS Tampa Bay, FL

August 6, 2000Citrus County, Hernando County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 6, 2000, 5:06 PM EDT for Citrus County, Hernando County, Florida. It was in force for 39 min. 2 reports 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: Aug 6, 2000, 5:06 PM EDT (21:06 UTC)
Expired: Aug 6, 2000, 5:45 PM EDT
In force: 39 min
Issued by: NWS Tampa Bay, FL
Area: Whole counties

Counties Citrus County, FL, Hernando County, FL

What was reported inside it

Time	Report	Where	Remark
Aug 6, 5:10 PM EDT	Thunderstorm Wind	Spring Hill, FL	The Hernando County Sheriffs Department reported that thunderstorm winds downed several trees, large branches and powerlines from Spring Hill to Brooksville.
Aug 6, 5:23 PM EDT	Thunderstorm Wind	Inverness, FL	The Citrus County Sheriffs Department reported that thunderstorm winds downed a couple large trees and a few branches on the Atwood Street in Inverness.

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, 9.1 hours before the alert went out and 111 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: 123 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 1512 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: -35 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.

638 
WUUS52 KTBW 062110
SVRTBW
FLC017-053-062145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
506 PM EDT SUN AUG 6 2000

THE NATIONAL WEATHER SERVICE IN RUSKIN FLORIDA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CITRUS COUNTY.
  HERNANDO COUNTY.

* UNTIL 545 PM EDT.

* AT 506 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
LINE OF DEVELOPING SEVERE THUNDERSTORMS .EXTENDING FROM INVERNESS TO 
TO BROOKSVILLE...MOVING WEST AT 25 MPH.

* SEVERE THUNDERSTORMS WILL AFFECT...INVERNESS AND BROOKSVILLE AND 
THEN CONTINUE TOWARD THE COAST AFFECTING AREAS ALONG US HIGHWAY 19.


SEVERE THUNDERSTORMS CONTAIN WIND GUSTS OF 60 MPH OR HIGHER...AND
HAIL THE SIZE OF DIMES OR LARGER. MOVE TO A PLACE OF SAFETY.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE
INDOORS IMMEDIATELY. DO NOT USE ELECTRICAL APPLIANCES OR TELEPHONES.

$$

LAT...LON 2900 8269 2844 8269 2851 8222 2868 8229
          2886 8225

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 Aug 6, 2:30 PM EDT, 2 hours 36 minutes earlier.

Area forecast discussion, Aug 6, 2:30 PM EDT, 2 hours 36 minutes before

WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
230 PM EDT SUN AUG 6 2000

CURRENTLY...THUNDERSTORMS ACTIVITY QUICKLY MOVING NW THROUGH OUR
SOUTHERN AND INTERIOR ZONES ASSOCIATED WITH NORTHERN END OF EASTERLY
WAVE IN THE SE GULF COMBINED WITH HEATING AND SEABREEZE BOUNDARY
CONVERGENCE. MODELS HAVE THIS ACTIVITY MOVING OVER CWA THRU 03Z. THEN
A RAPID DRYING ON MON AS SEEN IN MEAN RH FIELDS AS LOW AS 30 PERCENT.
UPPER RIDGE TO REMAIN OVER THE DEEP SOUTH WITH SFC RIDGE AXIS IN
PLACE OVER N FL. TROPICAL MOISTURE RETURNS TO THE S FL PENINSULA LATE
TUE. LONG RANGE MODELS HAVE AN EASTERLY WAVE APPROACHING FL WED AND
MOVING OVER THE PENINSULA THRU FRI WHICH WILL MAKE EXTENDED
INTERESTING...IF THIS SCENARIO ACTUALLY PLAYS OUT. BLEND OF GUIDANCE
LOOKS GOOD.

MARINE...SFC RIDGE AXIS OVER THE NORTH GULF WATERS TO CONTINUE
EAST TO SOUTHEAST FLOW. TROPICAL WAVE IN THE EXTENDED TO SHIFT
WINDS AND INCREASE SEAS.

PRELIMINARY NUMBERS:
TPA BB 076/093 076/094 4213
FMY BB 075/093 075/094 4214

.TBW...NONE.

RD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 1:59 PM EDT	Severe Thunderstorm Warning	TBW	Charlotte, Lee	46 min
Aug 6, 4:13 PM EDT	Tornado Warning	TBW	Hillsborough	32 min
Aug 6, 4:28 PM EDT	Severe Thunderstorm Warning	TBW	Pinellas	32 min
Aug 6, 4:48 PM EDT	Severe Thunderstorm Warning	TBW	Pasco	27 min

Nearby

Severe Thunderstorm Warnings in Florida, 2000 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.