Alert archive / Florida / Special Weather Statements in 2014

Special Weather Statement, NWS Melbourne, FL

July 29, 2014Saint Lucie County, Florida

NWS Melbourne, FL issued this special weather statement at Jul 29, 2014, 1:39 PM EDT for Saint Lucie County, Florida. It was in force for 66 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 29, 2014, 1:39 PM EDT (17:39 UTC)
Expired
Jul 29, 2014, 2:45 PM EDT
In force
66 min
Issued by
NWS Melbourne, FL

County Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 95 km from the middle of the area, began a volume at 17:39 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

Miami, FL (KMFL), launched 12:00Z, 5.7 hours before the alert went out and 166 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, Miami, FL at 12:00Z on 2014-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 109 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, Miami, FL at 12:00Z on 2014-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -34 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
109 J/kg
Mixed-layer CIN
-106 J/kg
Mixed-layer LCL
1403 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-34 m²/s²
0-3 km storm-relative helicity
-19 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 Jul 29, 9:48 AM EDT, 3 hours 51 minutes earlier.

Area forecast discussion, Jul 29, 9:48 AM EDT, 3 hours 51 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MELBOURNE FL
948 AM EDT TUE JUL 29 2014

.DISCUSSION...
TODAY/TONIGHT...SOME LARGE PRE FRONTAL CONVECTIVE CLUSTERS OVER THE
NORTHEAST GULF AND OFF NORTHEAST FLORIDA SUGGEST THE PENINSULA WILL
HAVE A HIGHER COVERAGE OF STORMS THIS AFTERNOON.

THE CENTRAL FLORIDA MORNING SOUNDINGS INDEED SHOW HIGHER MOISTURE
WITH PRECIPITABLE WATER AROUND 2 INCHES WHICH WILL SUPPORT HIGHER
COVERAGE THAN THE LAST TWO DAYS.  500 MB TEMPS ARE RATHER WARM...
MINUS 5 DEGREES CELSIUS BUT 700 MB TEMPS AT 8 DEGREES ARE NOT AS
WARM AS FORECAST BY THE GFS.  EARLY MORNING SATELLITE SHOWING PLENTY
OF SUNSHINE...SO WHERE IT HEATS UP INTO THE LOWER 90S...THERE WILL
BE DECENT INSTABILITY. NORTHERLY UPPER LEVEL WINDS MAY KEEP A GOOD
PART OF THE AREA FROM GETTING DEBRIS CLOUDS SO THE CURRENT POPS AT
50 PERCENT LOOK GOOD.

SOUNDINGS SHOW STORM MOTION TO THE EAST SOUTHEAST AROUND 15 MPH.
DESPITE THE HIGH MOISTURE THERE WAS SOME MID LEVEL DRIER AIR.  SO
EXPECT THAT A FEW STORMS WILL BE CAPABLE OF PRODUCING STRONG WIND
GUSTS BUT THE MAIN THREAT WILL BE FREQUENT LIGHTNING STRIKES IN THE
STRONGER STORMS.

EXPECT THE BULK OF CONVECTION TO HAVE PUSHED OFFSHORE BY EVENING BUT
WITH A LOW LEVEL TROUGH CLOSE BY TO THE NORTH...MOIST WESTERLY FLOW
SHOULD KEEP A CHANCE OF SHOWERS OR STORMS GOING UNTIL AROUND
MIDNIGHT.

&&

.AVIATION...ALREADY SOME SHOWERS/STORMS NEAR KLEE...SO THE CHANCE
FOR STORMS ALONG THE I-4 CORRIDOR WILL BE STARTING EARLIER THAN
NORMAL...LATE MORNING TO EARLY AFTERNOON. EXPECT THAT MANY OF THE
SHOWERS AND STORMS WILL PRODUCE IFR VISIBILITIES DUE TO THE MOIST
AIR MASS...BUT DURATION LOOKS SHORT DUE TO DECENT STORM MOTION...
EAST SOUTHEAST 15 KNOTS. STRONG WIND GUSTS WILL ALSO OCCUR.  SOME OF
THESE GUSTS COULD SWEEP OUT WELL AHEAD OF CONVECTION AND LIMIT THE
COVERAGE OF RAINFALL AND IFR CONDITIONS. CONVECTIVE CLUSTERS IN
THE SURROUNDING WATERS HAVE HAD MODERATE LIGHTNING AMOUNTS SO WE
SHOULD EXPECT SIMILAR STORMS THIS AFTERNOON OVER LAND.

&&

.MARINE...
TODAY/TONIGHT...FRONTAL BOUNDARY MOVING INTO NORTH FLORIDA WILL KEEP
A WEST/SOUTHWEST FLOW OVER THE WATERS. WINDS EARLY THIS MORNING HAVE
BEEN AROUND 15 KNOTS...BUT THE FRONTAL TROUGH IS FORECAST TO WEAKEN
AND THE PRESSURE GRADIENT DECREASE...ESPECIALLY TONIGHT.  SMALL
CRAFT OPERATORS OFFSHORE SHOULD BE PREPARED FOR A CHOPPY RIDE BACK
TO THE COAST. ALLOW EXTRA TIME WHEN RETURNING TO SAFE HARBOR AHEAD
OF STORMS MOVING OFF THE PENINSULA THIS AFTERNOON.

&&

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

&&

SHORT TERM...LASCODY
IMPACT WX....SEDLOCK
Hazardous weather outlook, Jul 29, 12:00 PM EDT, 1 hour 39 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MELBOURNE FL
1200 PM EDT TUE JUL 29 2014

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-292200-
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-
1200 PM EDT TUE JUL 29 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

.THUNDERSTORM IMPACT...
INCREASING MOISTURE AHEAD OF A FRONT MOVING INTO NORTH FLORIDA
WILL LEAD TO GREATER COVERAGE OF CONVECTION ACROSS THE AREA TODAY.
SCATTERED SHOWERS AND STORMS WILL INCREASE IN COVERAGE THROUGH THE
DAY. A FEW STORMS MAY BECOME STRONG...PRODUCING FREQUENT
LIGHTNING...GUSTY WINDS UP TO AROUND 45 MPH AND LOCALLY HEAVY
RAINFALL. STORM MOTION WILL BE TOWARD THE EAST-SOUTHEAST AT 15 TO 20
MPH.

.RIP CURRENT IMPACT...
OCEAN CONDITIONS WILL GENERATE A LOW TO MODERATE THREAT OF RIP
CURRENTS ALONG AREA BEACHES TODAY...PRIMARILY NORTH OF CAPE
CANAVERAL. CHECK WITH LOCAL BEACH RESCUE ON LATEST SURF CONDITIONS
AND ALWAYS SWIM NEAR A LIFEGUARD.

.MARINE THUNDERSTORM GUST IMPACT...
SCATTERED THUNDERSTORMS MOVING TO THE EAST-SOUTHEAST AT 15 TO 20 MPH
COULD AFFECT BOATERS ON INLAND LAKES AND THE NEARSHORE ATLANTIC
WATERS. IF YOU SEE DARKENING SKIES TO THE WEST...MOVE TO SAFE
HARBOR. GUSTY WINDS TO AROUND 45 MPH WILL BE POSSIBLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
A FRONTAL BOUNDARY WILL PUSH SOUTHWARD INTO CENTRAL FLORIDA WITH
DRIER AIR BUILDING DOWN INTO THE REGION. THIS WILL LEAD TO LOWER
AFTERNOON THUNDERSTORM CHANCES WEDNESDAY AND THURSDAY...ESPECIALLY
NORTH OF SOUTHERN BREVARD AND SOUTHERN OSCEOLA COUNTIES.

AS WEAK FRONT CONTINUES TO FADE ACROSS FLORIDA INTO LATE WEEK...
INCREASING MOISTURE WILL ALLOW FOR MORE NORMAL THUNDERSTORM
COVERAGE FRIDAY AND INTO THE WEEKEND.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

WEITLICH/TS

In the hours before

Special weather statement, Jul 29, 12:38 PM EDT, 1 hour 1 minute before
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Special weather statement, Jul 29, 12:47 PM EDT, 52 minutes before
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Special weather statement, Jul 29, 1:39 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
Jul 29, 12:02 PM EDTSpecial Marine WarningMLB73 min
Jul 29, 12:38 PM EDTSpecial Weather StatementMLBVolusia52 min
Jul 29, 12:47 PM EDTSpecial Weather StatementMLBOkeechobee43 min
Jul 29, 1:03 PM EDTSpecial Marine WarningMLB87 min
Jul 29, 1:08 PM EDTSpecial Marine WarningMLB82 min
Jul 29, 1:40 PM EDTSpecial Weather StatementMLBIndian River35 min
Jul 29, 2:02 PM EDTSpecial Marine WarningMLB88 min
Jul 29, 3:12 PM EDTSpecial Weather StatementMLBVolusia63 min
Jul 29, 3:22 PM EDTSpecial Weather StatementMLBBrevard53 min
Jul 29, 3:37 PM EDTSpecial Weather StatementMLBSeminole53 min
Jul 29, 6:35 PM EDTSpecial Weather StatementMLBBrevard40 min
Jul 29, 6:38 PM EDTSpecial Marine WarningMLB67 min

Nearby

Special Weather Statements in Florida, 2014Every special weather statement in 2014

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.