Alert archive / Florida / Special Weather Statements in 2011

Special Weather Statement, NWS Melbourne, FL

June 29, 2011Osceola County, Florida

NWS Melbourne, FL issued this special weather statement at Jun 29, 2011, 1:07 PM EDT for Osceola County, Florida. It was in force for 53 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 29, 2011, 1:07 PM EDT (17:07 UTC)
Expired
Jun 29, 2011, 2:00 PM EDT
In force
53 min
Issued by
NWS Melbourne, FL

County Osceola County, FL

The radar

The Melbourne radar (KMLB), 48 km from the middle of the area, began a volume at 17:08 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, 5.1 hours before the alert went out and 82 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 2011-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1762 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 2011-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 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
1762 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
630 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-6 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 Jun 29, 10:00 AM EDT, 3 hours 7 minutes earlier.

Area forecast discussion, Jun 29, 10:00 AM EDT, 3 hours 7 minutes before
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Hazardous weather outlook, Jun 29, 11:34 AM EDT, 1 hour 33 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MELBOURNE FL
1134 AM EDT WED JUN 29 2011

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-300345-
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-
1134 AM EDT WED JUN 29 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

.THUNDERSTORM IMPACT...
DESPITE CONSIDERABLE MID AND UPPER CLOUDINESS...SUFFICIENT HEATING
WILL STILL BE ABLE TO COMBINE WITH A TROPICALLY MOIST ATMOSPHERE
TO PRODUCE SCATTERED TO NUMEROUS THUNDERSTORMS THIS AFTERNOON AND
EARLY EVENING. DUE TO A MEASURE OF OFFSHORE WIND FLOW...THE EAST
COAST SEA BREEZE WILL BE SLOWER TO DEVELOP WITH INLAND PROPAGATION
SLOWER AS WELL. OVERALL STORM MOTION WILL BE TOWARD THE NORTH AND
NORTHEAST AT 10 TO 15 MPH.

STORMS THIS AFTERNOON WILL BE CAPABLE OF PRODUCING FREQUENT CLOUD
TO GROUND LIGHTNING AND VERY HEAVY DOWNPOURS. A FEW STRONG STORMS
MAY PRODUCE WIND GUSTS UP TO 50 MPH.

.FLOOD IMPACT...
THE POTENTIAL FOR SEVERAL HEAVY DOWNPOURS EXISTS THIS AFTERNOON.
SOME STORMS MAY MOVE ACROSS THE SAME LOCATIONS...ADDING TO THE
OPPORTUNITY FOR LOCAL AMOUNTS OF 2 TO 3 INCHES. THIS MAY LEAD TO
TEMPORARY FLOODING OF ROADS AND LOW LYING AREAS...ESPECIALLY
WHERE HEAVY RAINFALL HAS FALLEN OVER THE PAST COUPLE OF DAYS.

.MARINE THUNDERSTORM GUST IMPACT...
THUNDERSTORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS OF 35 KNOTS
OVER THE ATLANTIC AND INTRACOASTAL WATERS...AS WELL AS INLAND
LAKES. STORM MOTION WILL BE TOWARD THE NORTH AND NORTHEAST AT 10
TO 15 MPH.

.WATERSPOUT IMPACT...
DEEP MOISTURE AND RELATIVELY WEAK WIND FIELDS MAY ALLOW A FEW
WATERSPOUTS TO DEVELOP ALONG CLOUD LINES NEAR THE COAST.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
ATMOSPHERIC MOISTURE AND INSTABILITY ARE EXPECTED TO REMAIN
SUFFICIENT FOR SCATTERED SHOWERS AND LIGHTNING STORMS TO OCCUR
EACH AFTERNOON THIS WEEK.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS ARE REQUESTED TO MONITOR THE WEATHER AND SELF ACTIVATE
IF NEEDED.

TS/DS

In the hours before

Special weather statement, Jun 29, 10:31 AM EDT, 2 hours 36 minutes before
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Special weather statement, Jun 29, 11:13 AM EDT, 1 hour 54 minutes before
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Special weather statement, Jun 29, 12:33 PM EDT, 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1233 PM EDT WED JUN 29 2011

FLZ047-054-291730-
INDIAN RIVER-SOUTHERN BREVARD COUNTY-
1233 PM EDT WED JUN 29 2011

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR STRONG WIND GUSTS
BETWEEN 45 AND 55 MPH OVER NORTHERN INDIAN RIVER COUNTY...AND
SOUTHERN BREVARD COUNTY...

* UNTIL 130 PM EDT.

AT 1229 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STORMS CAPABLE OF PRODUCING STRONG WIND GUSTS OVER SEBASTIAN...MOVING
NORTH AT 20 MPH.

LOCATIONS IN THE PATH OF THE STORMS WHICH MAY EXPERIENCE STRONG
WINDS INCLUDE MELBOURNE BEACH...MICCO...SEBASTIAN INLET...AND VERO
BEACH.

THE PRIMARY THREAT WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND
GUSTY WINDS OF 45 TO 55 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 2767 8086 2834 8086 2834 8071 2828 8069
      2833 8071 2834 8065 2831 8065 2829 8066
      2823 8063 2828 8061 2833 8063 2834 8060
      2820 8059 2811 8057 2784 8042 2769 8036
TIME...MOT...LOC 1630Z 182DEG 29KT 2778 8048

DWS
Local storm report, Jun 29, 12:38 PM EDT, 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
1238 PM EDT WED JUN 29 2011

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

1214 PM     TSTM WND GST     3 ESE GIFFORD           27.66N 80.36W
06/29/2011  M46 MPH          INDIAN RIVER       FL   MESONET

            WEATHERUNDERGROUND REPORT 225/17G37 KTS.

&&

FXD
Special weather statement, Jun 29, 1:07 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
107 PM EDT WED JUN 29 2011

FLZ045-053-291800-
ORANGE-OSCEOLA-
107 PM EDT WED JUN 29 2011

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR STRONG WIND GUSTS
BETWEEN 45 AND 55 MPH OVER SOUTHEASTERN ORANGE COUNTY...EASTERN
OSCEOLA COUNTY...

* UNTIL 200 PM EDT.

AT 103 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STORMS CAPABLE OF PRODUCING STRONG WIND GUSTS FROM BITHLO AND
CHRISTMAS...TO HARMONY AND HOLOPAW...TO DEER PARK...TO KENANSVILLE
AND YEEHAW JUNCTION...MOVING NORTHEAST AT 10 MPH.

THE PRIMARY THREAT WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND
GUSTY WINDS OF 45 TO 55 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 2859 8127 2859 8096 2832 8089 2764 8087
      2765 8114 2767 8114 2768 8116 2772 8116
      2773 8118 2777 8118 2779 8120
TIME...MOT...LOC 1705Z 230DEG 10KT 2825 8111

DWS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 10:31 AM EDTSpecial Weather StatementMLBSaint Lucie44 min
Jun 29, 10:42 AM EDTSpecial Marine WarningMLB78 min
Jun 29, 11:20 AM EDTSpecial Marine WarningMLB85 min
Jun 29, 12:33 PM EDTSpecial Weather StatementMLBBrevard, Indian River57 min
Jun 29, 12:38 PM EDTSpecial Marine WarningMLB112 min
Jun 29, 3:08 PM EDTAreal Flood AdvisoryMLBOsceola112 min
Jun 29, 3:25 PM EDTSpecial Weather StatementMLBOrange50 min
Jun 29, 3:30 PM EDTSpecial Weather StatementMLBMartin, Saint Lucie60 min
Jun 29, 3:48 PM EDTAreal Flood AdvisoryMLBOkeechobee117 min
Jun 29, 3:50 PM EDTSpecial Weather StatementMLBMartin40 min

Nearby

Special Weather Statements in Florida, 2011Every special weather statement in 2011

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.