Alert archive / Florida / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 47, NWS Tampa Bay, FL

August 5, 2005Polk County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 5, 2005, 3:22 PM EDT for Polk County, Florida. It was in force for 18 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 5, 2005, 3:22 PM EDT (19:22 UTC)
Expired: Aug 5, 2005, 3:40 PM EDT
In force: 18 min
Issued by: NWS Tampa Bay, FL
Area: Counties, with a storm outline in the text

County Polk County, FL

The radar

The Tampa radar (KTBW), 74 km from the middle of the area, began a volume at 19:26 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.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 7.4 hours before the alert went out and 74 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: 293 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 1297 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: -32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 5, 1:56 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, Aug 5, 1:56 PM EDT, 1 hour 26 minutes before

WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
156 PM EDT FRI AUG 5 2005

.SHORT TERM (TONIGHT-SUN)...ETA/NAM HAS BEEN HAVING PROBLEMS WITH
RUN-TO-RUN CONSISTENCY. LATEST RUN SHOWS MOSTLY EASTERLY FLOW OVER
THE STATE FOR THIS AFTERNOON...HOWEVER OBSERVATIONS SHOW ONSHORE
FLOW ON BOTH COASTS WITH LIGHT WINDS IN THE INTERIOR. WILL BASE
THIS FORECAST CYCLE ON THE MUCH MORE CONSISTENT GFS WHICH HAS GOOD
DEPICTION OF SEA BREEZE EACH DAY.

SURFACE RIDGE AXIS WILL MOVE EVER SO SLOWLY NORTH THIS WEEKEND...
BUT STILL REMAINING WEAK AND GENERALLY SOUTH OF THE BAY AREA. THIS
MEANS CONTINUED LIGHT AND MOSTLY VARIABLE WINDS WITH LOCAL LAND AND
GULF BREEZES BEING THE MAIN DRIVER. STEERING FLOW WILL BE WEAK AS
WELL...BUT INITIAL SCATTERED/40 POP ACTIVITY NEAR INITIAL SEA
BREEZE BOUNDARY WILL MOVE INLAND WHERE EAST COAST SEA BREEZE AND
MULTIPLE BOUNDARY COLLISIONS WILL RESULT IN AT LEAST 50 POPS FOR
OUR INTERIOR COUNTIES EACH DAY.

TEMPERATURES SHOULD BE WITHIN A DEGREE OR TWO OF NORMALS AND WILL
ONLY MAKE MINOR TWEAKS HERE AND THERE.

&&

.LONG TERM (SUN NIGHT-FRI)...LITTLE CHANGE FROM PREVIOUS THINKING
FOR NEXT WEEK WITH UPPER LEVEL RIDGE REMAINING OVER THE AREA AND
SURFACE RIDGE AXIS MEANDERING OVER THE CENTRAL FLORIDA PENINSULA
KEEPING RATHER LIGHT FLOW ACROSS THE REGION.  DAYTIME HEATING WILL
COMBINE WITH THE MOISTURE IN PLACE AND THE SEA/LAKE BREEZES TO CAUSE
SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS EACH DAY WITH
TEMPERATURES REMAINING NEAR NORMAL THROUGH THE PERIOD.

&&

.MARINE...AT THE RISK OF SOUNDING LIKE A BROKEN RECORD...WEAK
PRESSURE GRADIENT WILL REMAIN IN PLACE THROUGH AT LEAST THE WEEKEND
WITH LIGHT WINDS AND SLIGHT SEAS. EVEN AFTER THE RIDGE STRENGTHENS
AND SHIFTS NORTHWARD...WINDS WILL REMAIN LIGHT. MAIN CONCERN WILL BE
ISOLATED TO LOW-END SCATTERED STORMS...MAINLY LATE NIGHT AND EARLY
MORNING HOURS NORTH OF THE BAY AND LATE AFTERNOON OR EVENING HOURS
SOUTH.

&&

.FIRE WEATHER...NO HIGHLIGHTS.

&&

.PRELIMINARY POINT TEMPS/POPS...
TPA 76 91 76 90 / 20 40 20 40
FMY 75 93 75 92 / 30 50 30 50
GIF 74 94 75 93 / 30 50 30 50
SRQ 74 91 75 90 / 20 40 20 40
BKV 71 91 71 90 / 20 40 20 40

&&

.TBW WATCHES/WARNINGS/ADVISORIES...NONE.

SHORT TERM...JILLSON
LONG TERM...CLOSE

Hazardous weather outlook, Aug 5, 5:22 AM EDT, 10 hours before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
522 AM EDT FRI AUG 5 2005

FLZ039-042-043-048>052-055>057-060>062-065-051521-
CHARLOTTE-CITRUS-DE SOTO-HARDEE-HERNANDO-HIGHLANDS-HILLSBOROUGH-LEE-
LEVY-MANATEE-PASCO-PINELLAS-POLK-SARASOTA-SUMTER-
522 AM EDT FRI AUG 5 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
FLORIDA AND WEST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED AFTERNOON SHOWERS AND THUNDERSTORMS ARE EXPECTED OVER
MOST OF WEST CENTRAL AND SOUTHWEST FLORIDA WITH INLAND LOCATIONS
RECEIVING THE GREATEST COVERAGE...ESPECIALLY INTERIOR PORTIONS
OF THE NATURE COAST AND POLK COUNTY. THE STRONGER STORMS WILL BRING
DANGEROUS CLOUD TO GROUND LIGHTNING...HEAVY RAINS...AND BRIEF GUSTY
WINDS.

HEAT INDICES WILL RISE TO THE LOWER 100S. DRINK PLENTY OF WATER...
BEFORE YOU GET THIRSTY. WEAR LIGHTWEIGHT AND LIGHT COLORED CLOTHING.
RESERVE STRENUOUS EXERCISE FOR EARLY MORNING OR EVENING HOURS. STAY
NEAR AIR CONDITIONED LOCATIONS IF POSSIBLE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED EACH DAY WITH THE
STRONGER STORMS PRODUCING BRIEFLY GUSTY WINDS...HEAVY RAINS...AND
DANGEROUS LIGHTNING.

IN ADDITION...HEAT INDICES ARE EXPECTED TO TOP OUT A LITTLE ABOVE 100
DEGREES EACH AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE REQUIRED.

In the hours before

Local storm report, Aug 5, 12:09 PM EDT, 3 hours 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1209 PM EDT FRI AUG 05 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1201 PM     LIGHTNING        DUNDEE                  28.02N 81.62W
08/04/2005                   POLK               FL   NEWSPAPER

            *** 1 INJ *** FIREFIGHTER IN DUNDEE STRUCK BY LIGHTNING
            STRIKE,THROUGH HIS COMPUTER, WHICH HE WAS SHUTTING DOWN.
            FELT LIKE HE WAS RUNOVER BY AN ENTIRE FOOTBALL TEAM.
            OTHERWISE NO DAY AFTER AFFECTS.

&&

KAMP

Local storm report, Aug 5, 2:41 PM EDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
241 PM EDT FRI AUG 05 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0213 PM     HAIL             3 NNE TAMPA             28.00N 82.46W
08/05/2005  0.88 INCH        HILLSBOROUGH       FL   TRAINED SPOTTER

            NICKLE SIZE HAIL REPORTED AT THE UNIVERSITY OF SOUTH
            FLORIDA.

&&

DAVIS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 9:00 PM EDT	Severe Thunderstorm Warning	TBW	Highlands	30 min
Aug 5, 2:07 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough	23 min
Aug 5, 3:48 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough	20 min

Nearby

Severe Thunderstorm Warnings in Florida, 2005 Every severe thunderstorm warning in 2005

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; radar from the NEXRAD Level II archive.