Alert archive / Florida / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 35, NWS Tampa Bay, FL

June 4, 2001Hillsborough County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 4, 2001, 4:44 PM EDT for Hillsborough County, Florida. It was in force for 46 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: Jun 4, 2001, 4:44 PM EDT (20:44 UTC)
Expired: Jun 4, 2001, 5:30 PM EDT
In force: 46 min
Issued by: NWS Tampa Bay, FL
Area: Whole counties

County Hillsborough County, FL

What was reported inside it

Time	Report	Where	Remark
Jun 4, 4:49 PM EDT	Hail 0.75	Tampa, FL	Dime sized hail was reported near the intersection of U.S. Highway 41 (Nebraska Avenue) and State Road 580 (Busch Blvd) in Tampa by a Skywarn Spotter.
Jun 4, 5:10 PM EDT	Hail 1	Tampa, FL	Quarter to nickel sized hail was reported by the public through WFLA-TV of Tampa near the intersection of State Road 580 (Busch Blvd) and U.S. Highway 92 (Dale Mabry Hwy) in Tampa.

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, 8.7 hours before the alert went out and 23 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: 779 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 1198 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: 7 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 042044
SVRTBW
FLC057-042130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
444 PM EDT MON JUN 4 2001

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN HILLSBOROUGH COUNTY IN FLORIDA.

* UNTIL 530 PM EDT.

* AT 444 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS...OVER
  TEMPLE TERRACE.  THE STORM WAS NEARLY STATIONARY.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  TEMPLE TERRACE.
  LUTZ.
  CARROLLWOOD.
  WEST PARK.
  TOWN 'N' COUNTRY.

SEVERE THUNDERSTORMS CONTAIN WIND GUSTS OF 6(0 MPH OR HIGHER...AND
HAIL THE SIZE OF DIMES OR LARGER. MOVE TO A PLACE OF SAFETY.

$$

LAT...LON 2795 8239 2813 8235 2820 8260 2798 8265

13
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 4, 2:30 PM EDT, 2 hours 14 minutes earlier.

Area forecast discussion, Jun 4, 2:30 PM EDT, 2 hours 14 minutes before

WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
230 PM EDT MON JUN 4 2001

UPPER RIDGE AXIS REMAINS IN PLACE OVER THE STATE WITH SFC RIDGE
CURRENTLY PLACED OVER THE N FL. SE LOW LEVEL FLOW GENERATING
STREAKY CU FIELD AS WEST COAST SEABREEZE BEGINNING TO SLOWLY PUSH
INLAND AS SEEN IN SAT IMAGERY. CURRENT TEMPS WARMING TO NEAR
EXPECTED CONVECTIVE TEMPS SO EXPECT CONVECTIVE ACTIVITY TO BEGIN
SHORTLY THIS AFTERNOON INTO THIS EVENING.

MODELS IN GOOD AGREEMENT WITH DEEPENING SE FLOW/MOISTURE TO PRODUCE
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS OVER THE AREA FOR
THE NEXT FEW DAYS. MODEL SOUNDING SHOWING PWATS APPROACHING 2 INCHES
WITH LIS -5 TO -6 AND CAPES OVER 3000 TO CONTINUE UNSTABLE
ENVIRONMENT OVER THE AREA. ALL MODEL GRAPHICS ALSO INDICATING
AFTERNOON PRECIP FIELDS OVER INTERIOR ZONES THEN MOVING OVER THE
COAST THEREAFTER AS STRONGER E COAST SEABREEZE DRIVES CONVECTION
WESTWARD. WILL BUY OFF ON THIS SOLUTION WITH THE COMBINATION
OF UNSTABLE ATMOSPHERE/DIURNAL HEATING AND BOUNDARY COLLISIONS FOR
CHANCE EVENING POPS TONIGHT WITH LIKELY POPS ON WED AFTERNOON INTO
EVENING. MODEL TEMPS LOOK GOOD WILL BLEND.

MARINE...SE FLOW TO CONTINUE WITH NO HIGHLIGHTS OVER THE WATERS AS
RIDGE REMAINS N THRU 48 HRS. RIDGE TO SINK S AS FRONT APPROACHES TO
E GULF THU/FRI.

EXTENDED...UPPER RIDGE TO SHIFT EASTWARD AS DEEPENING TROF MOVES INTO
THE S MS RV VALLEY INTO THU. SFC FRONT TO APPROACH THE AREA THU
NIGHT INTO FRI. UPPER SUPPORT WITH VORT MAX AT THE BASE OF THE
TROF TO MOVE OVER THE AREA TO PRODUCE SCT CONVECTION AHEAD
AND ALONG THE FRONT. FRONT EXPECTED TO GET HUNG OVER S FL PENINSULA
OVER THE WEEKEND WITH MOISTURE S OF FRONT AND SOME SFC DRYING OVER
THE N PENINSULA. UPPER TROF TO REMAIN OVER THE STATE LATE IN THE
PERIOD WITH WEAK SFC RIDGING BUILDING IN.

THX COORD MLB.

PRELIM NUMBERS:
TPA 75/91/75/90 4645
FMY 72/91/73/91 4645

.TBW...NONE.

RD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 5:18 PM EDT	Severe Thunderstorm Warning	TBW	Pasco	42 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.