Alert archive / Florida / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 80, NWS Tampa Bay, FL

June 19, 2001Hernando County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 19, 2001, 5:46 PM EDT for Hernando County, Florida. It was in force for 44 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, 5:46 PM EDT (21:46 UTC)
Expired
Jun 19, 2001, 6:30 PM EDT
In force
44 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Hernando County, FL

The radar

The Tampa radar (KTBW), 95 km from the middle of the area, began a volume at 21:47 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

TimeReportWhereRemark
Jun 19, 6:00 PM EDTHail 0.88Spring Hill, FLThe public reported nickel sized hail along U.S. Highway 19, two miles south of State Road 50 in Spring Hill.

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, 9.8 hours before the alert went out and 95 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-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2001-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 856 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2001-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
856 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
1008 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
-9 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 192147
SVRTBW

FLC053-192230-

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

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

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

* UNTIL 630 PM EDT.

* AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS...7 MILES
  WEST OF BROOKSVILLE...MOVING NORTHWEST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  BROOKSVILLE.
  WEEKI WACHEE.
  SPRINGHILL.

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

$$

LAT...LON 2845 8262 2847 8242 2864 8229 2867 8259

25
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, 4 hours 20 minutes earlier.

Area forecast discussion, Jun 19, 1:26 PM EDT, 4 hours 20 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.

IssuedProductOfficeCountiesLasted
Jun 19, 3:06 PM EDTSevere Thunderstorm WarningTBWLevy39 min
Jun 19, 4:39 PM EDTSevere Thunderstorm WarningTBWLee51 min
Jun 19, 4:55 PM EDTSevere Thunderstorm WarningTBWHillsborough50 min
Jun 19, 5:10 PM EDTSevere Thunderstorm WarningTBWPinellas35 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.