Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Tampa Bay, FL

August 14, 2012DeSoto County, Florida

NWS Tampa Bay, FL issued this special weather statement at Aug 14, 2012, 6:41 PM EDT for DeSoto County, Florida. It was in force for 49 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
Aug 14, 2012, 6:41 PM EDT (22:41 UTC)
Expired
Aug 14, 2012, 7:30 PM EDT
In force
49 min
Issued by
NWS Tampa Bay, FL

County DeSoto County, FL

The radar

The Tampa radar (KTBW), 73 km from the middle of the area, began a volume at 22:42 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, 10.7 hours before the alert went out and 73 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 2012-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2282 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 2012-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
2282 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
814 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
14 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 Aug 14, 12:53 PM EDT, 5 hours 48 minutes earlier.

Area forecast discussion, Aug 14, 12:53 PM EDT, 5 hours 48 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
1253 PM EDT TUE AUG 14 2012

.SHORT TERM (TONIGHT-THURSDAY)...SERIES OF UPPER TROUGHS CONTINUE
TO ROTATE OVER THE GREAT LAKES REGION INTO THE DEEP SOUTH WHILE
UPPER RIDGE CONTINUES TO GET SUPPRESSED FROM S FL PENINSULA TO OVER
THE NORTHERN CARIBBEAN. WEAK SURFACE BERMUDA RIDGE AXIS OVER THE
SOUTH CENTRAL FL PENINSULA TO SLOWLY DRIFT NORTHWARD THROUGH
THURSDAY. CONTINUE TO EXPECT WARM AND HUMID SUMMERTIME CONDITIONS
AREAWIDE WITH SCATTERED DIURNAL POPS MAINLY ALONG SEA BREEZE AND
BOUNDARY INTERACTIONS.

.LONG TERM (THURSDAY NIGHT-MONDAY)...HIGH PRESSURE WILL RIDGE
ACROSS THE AREA AT THE SURFACE AND ALOFT THROUGH THE PERIOD WITH A
WEAKENING BOUNDARY STALLING JUST NORTH OF THE REGION FOR SUNDAY
AND MONDAY. GENERAL AFTERNOON SCATTERED SEA BREEZE INDUCED
THUNDERSTORMS WILL BE POSSIBLE EACH DAY WITH RAIN CHANCES MAINLY
40 PERCENT. TEMPERATURES WILL BE IN THE 70S FOR LOWS AND IN THE
UPPER 80S TO LOWER 90S FOR HIGHS.

&&

.AVIATION...DEVELOPING SHOWERS AND THUNDERSTORMS WILL PRODUCE BRIEF
MVFR CONDITIONS AT ALL TERMINAL SITES BETWEEN 18 AND 22Z AND HAVE
TEMPOS IN THE TAFS TO COVER THIS...OTHERWISE VFR IS EXPECTED.
VARIABLE WINDS 5 KNOTS OR LESS WILL BECOME SOUTHWEST TO WEST AT 6
TO 8 KNOTS AFTER 18Z WITH GUSTS UP TO 25 KNOTS POSSIBLE IN THE
VICINITY OF THUNDERSTORMS. VARIABLE WINDS LESS THAN 5 KNOTS WILL
RETURN TO THE TERMINALS AFTER 01Z TONIGHT.

&&

.MARINE...HIGH PRESSURE RIDGE AXIS TO MEANDER AND HOLD OVER THE
REGION THROUGH THE WEEK AND INTO THE WEEKEND WITH WINDS AROUND 10
KNOTS OR LESS AND SEAS 2 FEET OR LESS WITH AFTERNOON SEABREEZES
AND SCATTERED SHOWERS AND THUNDERSTORMS.

&&

.FIRE WEATHER...LOW LEVEL MOISTURE REMAINS A TYPICAL SUMMERTIME
LEVELS.

&&

.PRELIMINARY POINT TEMPS/POPS...
TPA  78  91  79  92 /  20  30  20  20
FMY  76  93  76  94 /  20  30  20  40
GIF  75  94  76  94 /  20  40  20  40
SRQ  76  91  76  92 /  20  30  20  20
BKV  72  92  72  93 /  20  30  20  20
SPG  80  91  80  92 /  20  30  20  20

&&

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

SHORT TERM/MARINE/FIRE WEATHER...25/DAVIS
AVIATION...57/MCMICHAEL
LONG TERM...24/COLSON
Hazardous weather outlook, Aug 14, 5:50 AM EDT, 12 hours 51 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
550 AM EDT TUE AUG 14 2012

FLZ039-042-043-048>052-055>057-060>062-065-141600-
LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK-
MANATEE-HARDEE-HIGHLANDS-SARASOTA-DESOTO-CHARLOTTE-LEE-
550 AM EDT TUE AUG 14 2012

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

.DAY ONE...TODAY AND TONIGHT.

...THUNDERSTORM IMPACT...
SCATTERED THUNDERSTORMS WILL DEVELOP MAINLY THIS AFTERNOON AND
EVENING ALONG THE BAY AND SEA BREEZE BOUNDARIES WITH THE BEST
CHANCES INLAND. THE MAIN THREATS FROM THESE STORMS WILL BE DEADLY
CLOUD TO GROUND LIGHTNING...GUSTY WINDS...AND HEAVY RAINS CAUSING
MINOR FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

...THUNDERSTORM IMPACT...
SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS WILL DEVELOP
EACH DAY ALONG THE SEA BREEZE BOUNDARIES. A FEW STORMS COULD BE
STRONG WITH GUSTY WINDS AND FREQUENT LIGHTNING POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS SHOULD MONITOR THE WEATHER AND SELF ACTIVATE IF NEEDED.

COLSON

In the hours before

Local storm report, Aug 14, 3:45 PM EDT, 2 hours 56 minutes before
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Special weather statement, Aug 14, 3:59 PM EDT, 2 hours 42 minutes before
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Local storm report, Aug 14, 4:42 PM EDT, 1 hour 59 minutes before
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Special weather statement, Aug 14, 4:51 PM EDT, 1 hour 50 minutes before
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Special weather statement, Aug 14, 5:45 PM EDT, 56 minutes before
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Special weather statement, Aug 14, 6:41 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 2:54 PM EDTSpecial Weather StatementTBWSumter51 min
Aug 14, 3:12 PM EDTSpecial Weather StatementTBWHillsborough63 min
Aug 14, 3:20 PM EDTSevere Thunderstorm WarningTBWHillsborough, Polk40 min
Aug 14, 3:48 PM EDTAreal Flood AdvisoryTBWHillsborough, Polk87 min
Aug 14, 3:59 PM EDTSpecial Weather StatementTBWPolk61 min
Aug 14, 4:41 PM EDTAreal Flood AdvisoryTBWLee94 min
Aug 14, 4:51 PM EDTSpecial Weather StatementTBWDeSoto54 min
Aug 14, 5:04 PM EDTAreal Flood AdvisoryTBWHillsborough, Manatee86 min
Aug 14, 5:45 PM EDTSpecial Weather StatementTBWDeSoto, Highlands60 min
Aug 14, 5:55 PM EDTAreal Flood AdvisoryTBWDeSoto, Hardee, Highlands95 min
Aug 14, 6:43 PM EDTSpecial Weather StatementTBWHighlands32 min

Nearby

Special Weather Statements in Florida, 2012Every special weather statement in 2012

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.