Alert archive / Florida / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 138, NWS Tampa Bay, FL

August 25, 2001Sumter County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 25, 2001, 5:28 PM EDT for Sumter County, Florida. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 25, 2001, 5:28 PM EDT (21:28 UTC)
Expired: Aug 25, 2001, 6:15 PM EDT
In force: 47 min
Issued by: NWS Tampa Bay, FL
Area: Whole counties

County Sumter County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 9.5 hours before the alert went out and 116 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: 884 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 1146 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 4 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.

585 
WUUS52 KTBW 252129
SVRTBW
FLC119-252215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
528 PM EDT SAT AUG 25 2001

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

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

* UNTIL 615 PM EDT.

* AT 528 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL...6 MILES NORTHWEST OF
  WILDWOOD...MOVING SOUTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  WILDWOOD.

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 2905 8208 2893 8223 2871 8202 2886 8184

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 25, 1:59 PM EDT, 3 hours 29 minutes earlier.

Area forecast discussion, Aug 25, 1:59 PM EDT, 3 hours 29 minutes before

WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
159 PM EDT SAT AUG 25 2001

ANOTHER CUT AND DRIED FCST THIS TIME AROUND.  SFC HIGH PRESSURE WILL
PREVAIL THROUGH THE PERIOD...AND AFTER WEAK SHORT WAVE ENERGY
ROUNDS BASE OF DEPARTING TROUGH OFF THE CAROLINAS...UPPER RIDGE WILL
SET UP SHOP...WITH RIDGE AXIS SMACK DAB OVER THE CWFA.  WHAT THIS
MEANS IS A CONTINUATION OF BELOW NORMAL AREAL PCPN TO END AUGUST.

MODELS ARE IN VERY GOOD AGREEMENT WITH THE BIG PICTURE ONCE AGAIN
TODAY.  STATISTICAL GUIDANCE VARIES A BIT ON SUN...THE NGM HAS A BIT
MORE MOISTURE THROUGH THE ENTIRE LAYER...BUT WILL LEAN TOWARD THE
SLIGHTLY DRIER AVN/ETA.

SHORT TERM:
NORTHERLY FLOW JUST STRONG ENOUGH TO DISRUPT THE WCSB A TAD THIS
AFTN.  EARLIER MESO-ETA FAVORED THE SW PORTION OF THE AREA FOR PCPN
AFTER SUNSET...BUT LOWEST DWPT RESIDE THERE ATTM.  STILL...MODELS
SHOW BEST CONVERGENCE OVER THE S CENTRAL/SW ZONES THIS EVE.  WILL
ROLL PERSISTENCE WITH ISOLD PCPN THIS EVE.

OTHERWISE...SUN FCST OVER INTERIOR AND SW COULD GO ISOLD OR SCT...
STILL WITH LOW PROBABILITIES.  WITH SLIGHTLY DRIER AIR ADVECTING IN
AS ADVERTIZED BY SEVERAL RUNS OF THE AVN/ETA WILL LEAVE THE ISOLD
VALUES AS IS.  BY MON...THE DEEP N FLOW BEGINS TO WEAKEN/BACK TO THE
W (ALFT)...AND SFC FLOW BECOMES EVEN MORE NONDESCRIPT.  WILL BROAD
BRUSH SCT (LOW END) PCPN EVERYWHERE.

EXTENDED:
RIDGE AXIS MOVES LITTLE THROUGH NEXT WEEKEND.  AVN MEAN RH
GENERALLY NEAR OR JUST UNDER 50 PERCENT...IMPLYING LOW LEVEL
MOISTURE REMAINS CAPPED TO SOME DEGREE.  WILL LEAVE SCT WORDING
RIGHT THROUGH THE PERIOD...THOUGH EXPECT LOW AREAL COVERAGE EACH DAY.

MARINE:  HIGH PRESSURE MEANS LITTLE ACTIVITY.  LIGHT WINDS/SLIGHT
SEAS.

FIRE WX:  MIN RH SHOULD GRADUALLY CREEP TOWARD THE 50-55 RANGE AS
THE WEEK PROGRESSES...AND MIXING VALUES RETURN TO SEASONAL NORMS.
NO HIGHLIGHTS.

PRELIM NUMBERS:
TPA UB 077/092 077/092 1222
FMY UB 074/093 074/093 2223

.TBW...NONE.

88/GOLDSMITH

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; the sounding from the Mesonet's radiosonde archive.