Alert archive / Florida / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 76, NWS Tampa Bay, FL

June 19, 2001Levy County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 19, 2001, 3:06 PM EDT for Levy County, Florida. It was in force for 39 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 19, 2001, 3:06 PM EDT (19:06 UTC)
Expired: Jun 19, 2001, 3:45 PM EDT
In force: 39 min
Issued by: NWS Tampa Bay, FL
Area: Whole counties

County Levy County, FL

The radar

The Jacksonville radar (KJAX), 170 km from the middle of the area, began a volume at 19:07 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 19, 3:30 PM EDT	Hail 0.75	Otter Creek, FL	Dime sized hail was reported by the Chiefland police department in Otter Creek.

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

Jacksonville, FL (KJAX), launched 12:00Z, 7.1 hours before the alert went out and 171 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: 1247 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 711 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 65 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 191907
SVRTBW

FLC075-191945-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
306 PM EDT TUE JUN 19 2001

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN LEVY COUNTY IN FLORIDA.

* UNTIL 345 PM EDT.

* AT 306 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH DAMAGING WINDS...14 MILES SOUTH OF
  CHIEFLAND...MOVING NORTHWEST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  OTTER CREEK.
  CHIEFLAND.

MOVE INSIDE A STURDY BUILDING. DAMAGING WIND...LARGE HAIL...
TORRENTIAL RAIN...AND DEADLY LIGHTNING ARE EXPECTED. STAY INSIDE AWAY
FROM WINDOWS UNTIL THE STORM HAS PASSED.

$$

LAT...LON 2921 8283 2934 8269 2972 8307 2954 8327

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 Jun 19, 1:26 PM EDT, 1 hour 40 minutes earlier.

Area forecast discussion, Jun 19, 1:26 PM EDT, 1 hour 40 minutes before

WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
126 PM EDT TUE JUN 19 2001

CURRENTLY: GULF SEA BREEZE REMAINING PINNED NEAR THE COAST SO FAR
THIS AFTERNOON...A SIGN THAT COASTAL COMMUNITIES SHOULD SEE THE BULK
OF THE STRONGER THUNDERSTORMS LATER TODAY. ALSO STARTING TO SEE A
FEW SHOWERS FORMING ON THE GULF BREEZE TO THE NORTH OF TAMPA BAY.

FORECAST: WITH A RELATIVE DIRTH OF 12Z MODEL DATA...WILL GENERALLY
JUST CONTINUE THE CURRENT FORECAST THROUGH ANOTHER DAY. WHAT MODEL
DATA WE DO HAVE CONTINUES TO SHOW A PREDOMINANT LOW LEVEL
SOUTHEASTERLY FLOW THROUGH THE SHORT TERM WITH PLENTY OF MOISTURE TO
FUEL AFTERNOON AND EVENING THUNDERSTORMS.

MARINE: OVERALL WINDS AND SEAS REMAINING QUIET BUT AFTERNOON AND
EVENING THUNDERSTORMS WILL PROVIDE LOCALLY GUSTY WINDS...FREQUENT
LIGHTNING...AND REDUCED VISIBILITIES.

EXTENDED: LOOKS LIKE WE WILL HAVE A COUPLE OF DAYS OF SOUTHWESTERLY
WINDS REVISIT OVER THE WEEKEND FROM TAMPA BAY NORTH IN RESPONSE TO
UPPER TROF DIGGING INTO THE EAST. WE SHOULD GO BACK TO EASTERLY FLOW
BY EARLY NEXT WEEK...HOWEVER...AS SURFACE RIDGE TO THE NORTH BRIDGES
DOWN THE EAST COAST. STILL ENOUGH MOISTURE AROUND TO MAINTAIN
SCATTERED CONVECTION THROUGHOUT THE EXTENDED PERIOD.

PRELIM NUMBERS:
TPA 92/72/92/72 5555
FMY 92/72/92/72 5555

.TBW...NONE.

ALSHEIMER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 4:39 PM EDT	Severe Thunderstorm Warning	TBW	Lee	51 min
Jun 19, 4:55 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough	50 min
Jun 19, 5:10 PM EDT	Severe Thunderstorm Warning	TBW	Pinellas	35 min
Jun 19, 5:46 PM EDT	Severe Thunderstorm Warning	TBW	Hernando	44 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.