Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Tampa Bay, FL

July 18, 2012Polk County, Florida

NWS Tampa Bay, FL issued this special weather statement at Jul 18, 2012, 11:57 AM EDT for Polk County, Florida. It was in force for 48 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
Jul 18, 2012, 11:57 AM EDT (15:57 UTC)
Expired
Jul 18, 2012, 12:45 PM EDT
In force
48 min
Issued by
NWS Tampa Bay, FL

County Polk County, FL

The radar

The Tampa radar (KTBW), 46 km from the middle of the area, began a volume at 15:59 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, 4.0 hours before the alert went out and 163 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, Cape Canaveral, FL at 12:00Z on 2012-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 231 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, Cape Canaveral, FL at 12:00Z on 2012-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.193958Sfc1 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
231 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
955 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-16 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 Jul 18, 10:33 AM EDT, 1 hour 24 minutes earlier.

Area forecast discussion, Jul 18, 10:33 AM EDT, 1 hour 24 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
1033 AM EDT WED JUL 18 2012

.DISCUSSION...
NUMEROUS SHOWERS AND THUNDERSTORMS THIS MORNING FROM THE TAMPA BAY
AREA NORTHWARD. THE SOUTHERN HALF OF THE AREA WILL BE SEEING
THUNDERSTORM DEVELOPMENT LATER THIS AFTERNOON AS HEATING AND THE
SEA BREEZE HELP TO FIRE THEM. TEMPS WILL BE REACHING INTO THE UPPER
80S TO LOWER 90S THIS AFTERNOON. CURRENT FORECAST IS ON TRACK
WITH ALL THIS AND HAVE NO UPDATES PLANNED.

&&

.AVIATION...
SCATTERED SHOWERS/STORMS WILL REDUCE CIGS/VSBYS TO MVFR AND
POSSIBLY IFR LEVELS OCCASIONALLY THROUGH MID MORNING AT THE
NORTHERN TAF SITES...BUT SHOULD SEE COVERAGE DECREASE BY LATE
MORNING INTO EARLY AFTERNOON AS DAYTIME HEATING DISRUPTS STREAM OF
ACTIVITY MOVING IN FROM THE GULF. EXPECT ADDITIONAL SHOWER/STORM
DEVELOPMENT ALL TERMINALS BY MID AFTERNOON...AND WILL HANDLE WITH
VCTS FOR NOW. SHOWERS/STORMS ARE EXPECTED TO END BY EARLY THIS
EVENING...THEN VFR CONDITIONS ARE EXPECTED THROUGH THE REMAINDER
OF THE OVERNIGHT HOURS.

&&

.MARINE...
WINDS AND SEAS WILL REMAIN LIGHT FOR THE NEXT SEVERAL DAYS WITH
HIGH PRESSURE RIDGING ACROSS THE WATERS FROM THE SE. SCATTERED TO
NUMEROUS THUNDERSTORMS IN PLACE THIS MORNING WILL GRADUALLY
DIMINISH THROUGH THE EVENING WITH WINDS AND SEAS LOCALLY HIGHER IN
STORMS. NO MAJOR CHANGES FOR THE UPDATE.

&&

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

&&

SHORT TERM/MARINE/FIRE WEATHER...24/COLSON
LONG TERM/AVIATION...21/JELSEMA
Hazardous weather outlook, Jul 18, 5:18 AM EDT, 6 hours 39 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
518 AM EDT WED JUL 18 2012

FLZ039-042-043-048>052-055>057-060>062-065-GMZ830-850-853-856-870-
873-876-182130-
LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK-
MANATEE-HARDEE-HIGHLANDS-SARASOTA-DESOTO-CHARLOTTE-LEE-
TAMPA BAY WATERS-TARPON SPRINGS TO SUWANNEE RIVER OUT 20 NM-
ENGLEWOOD TO TARPON SPRINGS OUT 20 NM-
BONITA BEACH TO ENGLEWOOD OUT 20 NM-
TARPON SPRINGS TO SUWANNEE RIVER OUT 20 TO 60 NM-
ENGLEWOOD TO TARPON SPRINGS OUT 20 TO 60 NM-
BONITA BEACH TO ENGLEWOOD OUT 20 TO 60 NM-
518 AM EDT WED JUL 18 2012

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

.DAY ONE...TODAY AND TONIGHT.

...THUNDERSTORM IMPACT...
SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS COASTAL AREAS THIS
MORNING THEN PUSH INLAND WITH THE SEA BREEZE THIS AFTERNOON. THE
MAIN IMPACT FROM THESE STORMS TODAY WILL BE FREQUENT CLOUD TO
GROUND LIGHTNING AND LOCALLY HEAVY RAIN.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

...THUNDERSTORM IMPACT...
SCATTERED AFTERNOON THUNDERSTORMS WILL OCCUR ALONG SEA BREEZE
BOUNDARIES EACH DAY. DRIER AIR MAY LIMIT OUR OVERALL THUNDERSTORM
CHANCES ON FRIDAY AND SATURDAY...BUT ALL THUNDERSTORMS ARE CAPABLE
OF PRODUCING DEADLY CLOUD TO GROUND LIGHTNING.

...EXCESSIVE HEAT IMPACT...
HEAT INDICES ARE FORECAST TO CLIMB TO BETWEEN 100 AND 105 DEGREES
EACH AFTERNOON THURSDAY THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

JILLSON

In the hours before

Local storm report, Jul 18, 9:33 AM EDT, 2 hours 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
933 AM EDT WED JUL 18 2012

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

0900 AM     FLOOD            HOLIDAY                 28.19N 82.74W
07/18/2012                   PASCO              FL   BROADCAST MEDIA

            STREET FLOODING WAS REPORTED IN HOLIDAY AROUND THE
            INTERSECTION OF US HIGHWAY 19 AND ALTERNATE 19.

0900 AM     FLOOD            JASMINE ESTATES         28.29N 82.69W
07/18/2012                   PASCO              FL   BROADCAST MEDIA

            STREET FLOODING WAS REPORTED IN JASMINE ESTATES NEAR THE
            INTERSECTION OF US HIGHWAY 19 AND EMBASSY BOULEVARD.

&&

COLSON
Special weather statement, Jul 18, 11:57 AM 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
Jul 18, 8:30 AM EDTAreal Flood AdvisoryTBWHillsborough, Pasco, Pinellas90 min
Jul 18, 10:57 AM EDTRiver Flood WarningTBWPasco59 hr
Jul 18, 1:13 PM EDTSpecial Marine WarningTBW92 min
Jul 18, 3:28 PM EDTSpecial Weather StatementTBWHighlands47 min
Jul 18, 3:29 PM EDTSpecial Weather StatementTBWPasco46 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.