Alert archive / Florida / Special Weather Statements in 2013

Special Weather Statement, NWS Tampa Bay, FL

June 27, 2013Hillsborough County, Florida

NWS Tampa Bay, FL issued this special weather statement at Jun 27, 2013, 3:08 PM EDT for Hillsborough County, Florida. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 27, 2013, 3:08 PM EDT (19:08 UTC)
Expired: Jun 27, 2013, 3:45 PM EDT
In force: 37 min
Issued by: NWS Tampa Bay, FL

County Hillsborough County, FL

The radar

The Tampa radar (KTBW), 36 km from the middle of the area, began a volume at 19:08 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 7.1 hours before the alert went out and 173 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: 785 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 870 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 58 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.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 26, 3:40 PM EDT, 23 hours 28 minutes earlier.

Area forecast discussion, Jun 26, 3:40 PM EDT, 23 hours 28 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
340 PM EDT WED JUN 26 2013

...THUNDERSTORMS DEVELOPING ACROSS WEST CENTRAL AND SOUTHWEST
FLORIDA...

.SYNOPSIS...
THE AXIS FROM AN ATLANTIC RIDGE OF HIGH PRESSURE SLIDES OVER
CENTRAL FLORIDA TODAY. THE ASSOCIATED WEAK SURFACE FLOW ALLOWS THE
WEST COAST SEA BREEZE TO PENETRATE DEEPER INTO THE PENINSULA OF
FLORIDA TODAY COMPARED TO PREVIOUS DAYS.

&&

.SHORT TERM (TODAY-FRIDAY)...
THUNDERSTORM ACTIVITY ALREADY UNDERWAY THIS AFTERNOON. THE WEST
COAST SEA BREEZE MAKING ITS WAY INLAND OVER MUCH OF WEST CENTRAL
AND SOUTHWEST FLORIDA. AN UPPER LEVEL TROUGH AMPLIFIES OVER THE
SOUTHEAST UNITED STATES TO END THE WEEK. THIS WILL ACT TO KEEP
THUNDERSTORM CHANCES ELEVATED AND POSSIBLY INTRODUCE SOME COLDER
AIR ALOFT WHICH COULD CREATE A LARGER HAIL THREAT IN THE COMING
DAYS. MAIN THREATS FROM SUMMER THUNDERSTORMS CONTINUE TO BE GUSTY
WINDS...HEAVY RAINS...WITH PLENTY OF MOISTURE AVAILABLE AND A
WEAK STEERING FLOW...AND FREQUENT LIGHTNING. CANNOT RULE OUT
FUNNEL CLOUDS AND WATERSPOUTS OVER THE PERIOD...THANKS TO PLENTY
OF OPPORTUNITIES FOR BOUNDARY COLLISIONS WITH CONVECTION.

THE RIDGE AXIS OVER CENTRAL FLORIDA WILL EXIT SOUTHWARD BY THE
WEEKEND...WITH A COLD FRONT ASSOCIATED WITH THE LOW PRESSURE
SYSTEM MOVING THROUGH THE GREAT LAKES MOVING CLOSER BY THE LONG
TERM FORECAST PERIOD. OTHERWISE...THE MAJORITY OF THE WEATHER IN
THE SHORT TERM PERIOD WILL BE DRIVEN BY DIURNAL PROCESSES AS THEY
HAVE BEEN THE LAST FEW DAYS. WENT A SMUDGE WARMER THAN GUIDANCE
BLEND DURING THE DAYS...THOUGH OVERNIGHT TEMPERATURES APPEARED ON
TRACK WITH THE BLEND. RAISED POPS SLIGHTLY ABOVE GUIDANCE
BLEND...MAINLY DUE TO THE APPROACHING UPPER LEVEL INFLUENCES AS
THE TROUGH AMPLIFIES.

.LONG TERM (FRIDAY NIGHT-TUESDAY)...
MODELS CONTINUE TO ADVERTISE A HIGHLY AMPLIFIED PATTERN THROUGH
THE PERIOD AS A MID-UPR LVL TROUGH DEEPENS RIGHT DOWN THE MS RIVER
VALLEY AND ALL THE WAY TO THE GULF COAST. SFC RIDGE AXIS IS
SUPPRESSED ACROSS DEEP S FL EARLY IN THE PERIOD AS A WEAK COLD
FRONT DIPS INTO NRN FL AND STALLS. THERE ARE SOME PRETTY GUSTY SW
WIND FORECAST FOR THIS TIME OF YEAR AND MAY EVEN SEE CAUTION
CONDITIONS FOR THE NRN GULF WATERS. THE TROUGH WILL HELP DRAW SOME
DEEPER TOPICAL MOISTURE ACROSS THE STATE SUNDAY AND ESP INTO EARLY
NEXT WEEK AS THE SFC RIDGE AXIS BEGINS TO MIGRATE BACK TO THE
NORTH. THIS WILL ALL LEAD TO AN INCREASINGLY WET PATTERN THROUGH
THE PERIOD WITH STORMS FAVORING INLAND AREAS INITIALLY IN THE SW
FLOW AND THEN FOCUSING FURTHER WEST WITH TIME. FOR NOW KEPT POPS
IN SCT RANGE GIVEN BEST RAIN CHC DAYS ARE STILL IN DAY 6 AND
BEYOND...BUT IF MODEL HOLD TRUE...EXPECT THESE WILL BE IN LIKELY
RANGE BEFORE IT IS ALL SAID AND DONE FOR EARLY NEXT WEEK. THE
TROUGH TO THE WEST MAY ALSO PRODUCE QUITE A BIT OF HIGH CLOUDINESS
EARLY NEXT WEEK AS WELL IN ADDITION TO CLOUDS ASSOC W/ PRECIP.
THIS WILL LEAD TO HIGHS CLOSER TO 90 EARLY NEXT WEEK.

&&

.AVIATION...
SCATTERED SHRA/TSRA SHOULD WIND DOWN AT THE TERMINALS BETWEEN 01Z
AND 03Z THURSDAY...WITH VFR CONDITIONS THEN EXPECTED THROUGH THE
OVERNIGHT HOURS. COULD SEE SHRA/TSRA DEVELOP AFTER 16/17Z
THURSDAY...BUT WILL LEAVE OUT OF THE TAFS AT THIS TIME.

&&

.MARINE...
A HIGH PRESSURE RIDGE ACROSS THE CENTRAL WATERS WILL SHIFT
SOUTHWARD INTO THE FLORIDA STRAITS BY THIS WEEKEND. WINDS WILL
SHIFT TO A MORE SOUTHWESTERLY DIRECTION AND INCREASE SOME FRIDAY
THROUGH THE WEEKEND. AT THIS TIME WINDS AND SEAS ARE EXPECTED TO
REMAIN BELOW HEADLINE THRESHOLDS.

&&

.FIRE WEATHER...
RELATIVE HUMIDITY VALUES WILL REMAIN ABOVE CRITICAL THRESHOLDS
THROUGH THE WEEKEND. NO WIDESPREAD FOG IS ANTICIPATED FOR THE
NEXT SEVERAL NIGHTS.

&&

.PRELIMINARY POINT TEMPS/POPS...
TPA  76  91  76  91 /  20  40  20  40
FMY  73  93  75  91 /  30  40  30  40
GIF  73  94  73  93 /  30  50  30  40
SRQ  75  90  76  91 /  20  40  20  40
BKV  71  92  72  92 /  20  40  20  40
SPG  78  91  79  90 /  20  40  20  40

&&

.TBW WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
GULF WATERS...NONE.
&&

SYNOPSIS/SHORT TERM/MARINE/FIRE WEATHER...02/GARCIA
AVIATION...21/JELSEMA
LONG TERM...88/GITTINGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 1:15 PM EDT	Special Weather Statement	TBW	Pinellas	45 min
Jun 27, 2:18 PM EDT	Special Weather Statement	TBW	Hillsborough	27 min
Jun 27, 5:35 PM EDT	Special Weather Statement	TBW	Charlotte	40 min
Jun 27, 5:50 PM EDT	Special Weather Statement	TBW	Sarasota	25 min
Jun 27, 5:59 PM EDT	Special Weather Statement	TBW	Charlotte	46 min
Jun 27, 6:41 PM EDT	Special Weather Statement	TBW	Hillsborough	34 min

Nearby

Special Weather Statements in Florida, 2013 Every special weather statement in 2013

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.