Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Melbourne, FL

August 10, 2012Volusia County, Florida

NWS Melbourne, FL issued this special weather statement at Aug 10, 2012, 4:41 PM EDT for Volusia 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 10, 2012, 4:41 PM EDT (20:41 UTC)
Expired
Aug 10, 2012, 5:30 PM EDT
In force
49 min
Issued by
NWS Melbourne, FL

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 130 km from the middle of the area, began a volume at 20:42 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, 8.7 hours before the alert went out and 185 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 2012-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1897 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 2012-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
1897 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
711 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
16 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 Melbourne, FL wrote its last area forecast discussion before this special weather statement went out at Aug 10, 3:11 PM EDT, 1 hour 30 minutes earlier.

Area forecast discussion, Aug 10, 3:11 PM EDT, 1 hour 30 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MELBOURNE FL
311 PM EDT FRI AUG 10 2012

.DISCUSSION...
RADAR SHOWS TWO GENERAL AREAS OF PCPN WITH THE AREA OVER THE
TREASURE COAST/LAKE OKEE ASCD WITH A TROPICAL WAVE MOVING ACROSS
THE FL STRAITS AND ONSHORE THE S FL COAST. ADTL AREA W OF METRO
ORLANDO MARKED BY SLOW MOVING CONVECTION PRODUCING SPOTTY HEAVY
RAIN OVER PORTIONS OF LAKE COUNTY. ADT'L STORMS WILL DEVELOP IN THE
AFTERNOON HEAT WITH NUMEROUS BOUNDARY MERGERS KEEPING ONGOING SCT
STORMS PERSISTING INTO THE EVENING OVER MUCH OF CENTRAL AND S FL.
ACTIVITY STRONGLY TIED TO SFC HEATING AND BOUNDARY INTERACTIONS
SHOULD DIMINISH SLOWLY IN COVERAGE DURING THE EVENING. RATHER WEAK
STEERING GENERALLY NOT FAVORABLE TO KEEP ACTIVITY GOING
OVERNIGHT...HOWEVER WL KEEP A SMALL MENTION FOR THE COAST DUE TO
PROXIMITY OF SFC WAVE AND DEEPENING MOISTURE.

FOR SAT/SUN...HAVE INCREASED RAIN CHCS SLIGHTLY ACROSS AREA DUE
TO CONSIDERABLE LINGERING MOISTURE ON LEE SIDE OF PASSING WAVE.
SOUTH TO SOUTHWEST FLOW SHOULD DELAY ONSET OF SEA BREEZE TO THE
MID AFTERNOON ALLOWING HIGHS TO REACH THE MID 90S INTERIOR AND THE
LOW 90S AT THE COAST. MORNING LOWS RANGE FROM THE LOWER AND MID
70S EVERYWHERE EXCEPT THE UPPER 70S AT THE IMMEDIATE COAST.

MON-FRI...(PREV DISC) UPPER TROUGHING OVER THE SOUTHEAST
SUPPRESSES THE SURFACE RIDGE TO SOUTHERN FLORIDA. THE RESULTING
SOUTH TO SOUTHWEST FLOW WILL CONTINUE TO FEED GULF MOISTURE INTO
CENTRAL FLORIDA AND KEEP RAIN CHANCES AROUND 40 PERCENT. DEPENDING
ON THE POSITION OF THE LOW LEVEL RIDGE AXIS AND THE STRENGTH OF
THE SOUTHWEST FLOW EACH DAY... THE SEA BREEZE WILL EITHER FORM
EARLY AFTERNOON OR MID TO LATE AFTERNOON. LATER ONSET OF THE SEA
BREEZE WILL MEAN SLIGHTLY HIGHER THAN THE CLIMO HIGHS. HIGHS IN
THE LOW 90S COASTAL COUNTIES AND MID 90S INTERIOR COUNTIES. LOWS
LOW TO MID 70S EVERYWHERE EXCEPT THE UPPER 70S AT THE IMMEDIATE
COAST.

&&

.AVIATION...
SCT PCPN AREAS WITH ISOLD TS WITH LCL MVFR/BRIEF IFR CONDS THROUGH
02Z THEN BECMG VFR FM 04Z-12Z. SCT TO NMRS SHRA DEVELOPING BY 16Z
SAT WITH SCT IFR CONDS AFT 16Z.

&&

.MARINE...
SEA HGHTS GENERALLY LESS THAN 3 FT OVERNIGHT WITH SIG WV NEAR 3
FT FOR THE OUTER WATERS INTO SAT. WINDS/SEAS LOCALLY HIGHER NEAR
MARINE TS TONIGHT.

SAT-TUE...SURFACE RIDGE REMAINS OVER SOUTHERN FLORIDA THROUGH THE
PERIOD. THIS RESULTS IN AN OFFSHORE FLOW WITH AN AFTERNOON ONSHORE
SEA BREEZE COMPONENT AT THE COAST. WINDS 15 KNOTS OR LESS AND SEAS
1 TO 2 FEET NEARSHORE AND 2 TO 3 FEET OFFSHORE.

&&

.PRELIMINARY POINT TEMPS/POPS...
DAB  75  91  75  91 /  30  50  20  40
MCO  75  93  75  92 /  20  50  20  50
MLB  75  91  74  89 /  30  50  20  40
VRB  74  92  74  91 /  30  60  20  40
LEE  76  94  77  93 /  20  40  20  50
SFB  77  94  77  93 /  20  50  20  50
ORL  76  94  77  93 /  20  50  20  50
FPR  73  91  73  90 /  40  60  20  40

&&

.MLB WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
AM...NONE.

&&

PUBLIC/MARINE/AVIATION...PENDERGRAST
RADAR/IMPACT WEATHER....WEITLICH
Hazardous weather outlook, Aug 10, 4:54 AM EDT, 11 hours 47 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MELBOURNE FL
454 AM EDT FRI AUG 10 2012

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-102100-
COASTAL WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE
OUT 20 NM-
COASTAL WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN
INLET OUT 20 NM-
COASTAL WATERS FROM SEBASTIAN INLET TO JUPITER INLET OUT 20 NM-
WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE 20 TO
60 NM OFFSHORE-
WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN INLET 20 TO
60 NM OFFSHORE-
WATERS FROM SEBASTIAN INLET TO JUPITER INLET 20 TO 60 NM OFFSHORE-
INLAND VOLUSIA-NORTHERN LAKE-ORANGE-SEMINOLE-SOUTHERN BREVARD-
OSCEOLA-INDIAN RIVER-OKEECHOBEE-ST. LUCIE-MARTIN-COASTAL VOLUSIA-
SOUTHERN LAKE-NORTHERN BREVARD-
454 AM EDT FRI AUG 10 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

.THUNDERSTORM IMPACT...
ATMOSPHERIC MOISTURE IS FORECAST TO INCREASE TODAY SO THE COVERAGE
OF AFTERNOON AND EVENING STORMS SHOULD BE A LITTLE GREATER THAN
THURSDAY. THE INLAND MOVING SEA BREEZE WILL BE THE INITIAL
FOCUS...THEN MULTIPLE BOUNDARY INTERACTIONS ACROSS INTERIOR
SECTIONS WILL GENERATE THE HIGHEST COVERAGE DURING THE AFTERNOON
AND EVENING.

THE MAIN HAZARD WITH ISOLATED STRONG STORMS WILL BE FREQUENT
LIGHTNING STRIKES. SOME LINGERING DRY AIR IN THE MID LEVELS OF THE
ATMOSPHERE WILL ALSO LEAD TO STRONG WIND GUSTS TO AROUND 50 MPH
IN A FEW STRONG STORMS.

.FLOOD IMPACT...
STORMS WILL HAVE LITTLE MOTION TODAY SO A FEW STRONG STORMS WILL
PRODUCE LOCAL 2 TO 3 INCH RAIN AMOUNTS.

.MARINE THUNDERSTORM GUST IMPACT...
ISOLATED STRONG STORMS WILL PRODUCE WIND GUSTS OVER 34 KNOTS
ACROSS THE MAINLAND THIS AFTERNOON. LITTLE STORM MOTION IS
EXPECTED...BUT GUSTY CONDITIONS COULD SPREAD WELL AWAY FROM THE
HEAVY RAIN AND LIGHTNING AND AFFECT THE INTRACOASTAL WATERS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
GREATER DEEP LAYER MOISTURE AND A LIGHT SOUTHWEST STEERING FLOW
WILL BRING SCATTERED AFTERNOON STORMS TO MOST SECTIONS THROUGH
EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS SHOULD MONITOR THE WEATHER AND SELF ACTIVATE THIS AFTERNOON
IF NEEDED.

LASCODY

In the hours before

Special weather statement, Aug 10, 2:16 PM EDT, 2 hours 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
216 PM EDT FRI AUG 10 2012

FLZ044-045-144-101900-
NORTHERN LAKE COUNTY-ORANGE-SOUTHERN LAKE COUNTY-
216 PM EDT FRI AUG 10 2012

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR STRONG WIND GUSTS
BETWEEN 45 AND 50 MPH OVER CENTRAL LAKE COUNTY...NORTHWESTERN ORANGE
COUNTY...

* UNTIL 300 PM EDT.

AT 210 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STORM CAPABLE OF PRODUCING STRONG WIND GUSTS OVER HOWEY IN THE
HILLS...MOVING NORTHEAST AT 5 TO 10 MPH.

THE PRIMARY THREAT WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND
GUSTY WINDS OF 45 TO 50 MPH...WHICH CAN CAUSE UNSECURED OBJECTS TO
BLOW AROUND...SNAP TREE LIMBS OR CAUSE POWER OUTAGES. HEAVY RAINFALL
WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE
STORM PASSES.

LAT...LON 2888 8167 2866 8156 2860 8180 2876 8189
TIME...MOT...LOC 1815Z 234DEG 4KT 2870 8177

WEITLICH
Special weather statement, Aug 10, 4:41 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 2:16 PM EDTSpecial Weather StatementMLBLake44 min
Aug 10, 5:29 PM EDTSpecial Marine WarningMLB68 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.