Alert archive / Florida / Special Weather Statements in 2011

Special Weather Statement, NWS Melbourne, FL

July 23, 2011Osceola County, Florida

NWS Melbourne, FL issued this special weather statement at Jul 23, 2011, 2:36 PM EDT for Osceola County, Florida. It was in force for 54 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 23, 2011, 2:36 PM EDT (18:36 UTC)
Expired: Jul 23, 2011, 3:30 PM EDT
In force: 54 min
Issued by: NWS Melbourne, FL

County Osceola County, FL

The radar

The Melbourne radar (KMLB), 52 km from the middle of the area, began a volume at 18:37 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, 6.6 hours before the alert went out and 94 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 972 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 997 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 10 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 22, 3:08 PM EDT, 23 hours 28 minutes earlier.

Area forecast discussion, Jul 22, 3:08 PM EDT, 23 hours 28 minutes before

AREA FORECAST DISCUSSION...COR TO ADD PRELIM POPS AND TEMPS
NATIONAL WEATHER SERVICE MELBOURNE FL
308 PM EDT FRI JUL 22 2011

.DISCUSSION...

CURRENT-TONIGHT...AFTERNOON STORMS WILL CONTINUE INTO THE EARLY
EVENING THEN DIMINISH AROUND 8 TO 9 PM AS THE SEA BREEZE BOUNDARY
COLLISIONS WILL HAVE CEASED AND THE ATMOSPHERE HAS BECOME A LITTLE
MORE STABLE DUE TO RAIN COOLED AIR. THERE MAY BE A SHOWER OR STORM
OVER THE INTERIOR AS WEAK OUTFLOW BOUNDARIES CONTINUE TO PROVIDE
SOME LIFT FOR ANOTHER HOUR OR TWO PAST SUNSET BUT ALL THE WEATHER
SHOULD HAVE STOPPED BY MIDNIGHT. SKIES WILL BECOME MOSTLY CLEAR AND
THE WINDS DIMINISH TO LIGHT OR CALM AS THE ATMOSPHERE DECOUPLES
UNDER THE CLEARING SKIES. LOWS IN THE LOW AND MID 70S EXCEPT ALONG
THE COAST COCOA BEACH SOUTH WHERE LOWS SATURDAY MORNING ARE FORECAST
TO BE IN THE MID AND UPPER 70S.

SAT-SUN NIGHT...SURFACE RIDGE AXIS WILL REMAIN OVER CENTRAL FLORIDA
THROUGH SUNDAY. LIGHT WIND PATTERN OVERNIGHT AND FIRST PART OF THE
MORNING. WINDS PICK UP MID MORNING AS THE ATMOSPHERE STARTS MIXING
WITH DAYTIME HEATING. SEA BREEZES TO FIRST FORM ALONG THE MARTIN AND
SAINT LUCIE COASTS THEN WORK NORTH INTO INDIAN RIVER AND SOUTHERN
BREVARD COUNTIES EARLY-MID AFTERNOON. DEPENDING ON HOW FAR NORTH OR
SOUTH THE RIDGE AXIS IS WILL DETERMINE HOW EARLY OR LATE THE SEA
BREEZE STARTS FROM CAPE CANAVERAL TO FLAGLER BEACH. SOUTHEAST TO
SOUTH DEEP LAYER FLOW WILL TRANSPORT A MOIST CARIBBEAN AND SOUTHEAST
GULF OF MEXICO AIR MASS OVER FLORIDA WITH PRECIPITABLE WATER VALUES
IN THE 1.75 TO 2 OR MORE INCH RANGE BOTH DAYS. WITH PRIMARILY
MESOSCALE FORCING FEATURES SUCH AS SEA AND LAKE BREEZE COLLISION AND
OUTFLOW BOUNDARY INTERACTIONS WILL NOT GO VERY HIGH WITH RAIN
CHANCES OVER THE WEEKEND. LOW AND MID 90S AT THE COAST AND MID TO
UPPER 90S WELL INLAND EACH AFTERNOON. MORNING LOWS MID 70S AND UPPER
70S AT THE COAST.

PREVIOUS EXTENDED DISCUSSION...EARLY NEXT WEEK THE RIDGE OVER THE
STATE SHOWS BREAKING DUE TO FALLING HGHTS ACROSS THE CAROLINAS.
DEVELOPMENT OF A MEAN SFC TROUGH ALONG THE MID ATLC SEA BOARD WL ACT
TO TO INCREASE PCPN CHCS BY TUE AND CONTINUING THROUGH MIDWEEK WITH
DEVELOPMENT OF WLY STEERING LEVEL FLOW ALONG WITH LESS CONV
INHIBITION (COOLER TEMPS ALOFT AND MOISTURE). TROPICAL WV APCHG THE
BAHAMAS AROUND WED MAY HELP TO INCREASE MOISTURE LATE IN THE
WEEK...KEEPING AT LEAST SEASONAL PRECIP CHCS IN THE FCST.

&&

.AVIATION...MOSTLY VFR CONDITIONS WITH BRIEF MVFR/IFR WITH SCATTERED
SHRA AND TSRA. RA SHOULD END BY 02Z WITH VFR CONDITIONS OVERNIGHT
AND INTO TOMORROW MORNING.

&&

.MARINE...TONIGHT-MON...A HIGH PRESSURE RIDGE WILL LIE ACROSS THE
CENTRAL FLORIDA PENINSULA WITH A LIGHT PRESSURE GRADIENT OVER THE
COASTAL WATERS. MAINLY SE TO SW WINDS 10 KNOTS OR LESS. SEA BREEZE
ENHANCES WINDS AT THE COAST. SEAS 1-2 FT.

&&

.PRELIMINARY POINT TEMPS/POPS...
DAB  74  93  75  92 /  20  20  20  30
MCO  74  96  77  95 /  20  30  20  30
MLB  75  92  77  92 /  20  20  10  20
VRB  73  91  75  91 /  20  20  10  20
LEE  76  96  75  95 /  20  30  20  30
SFB  76  96  77  96 /  20  30  20  30
ORL  76  96  76  95 /  20  30  20  30
FPR  73  90  75  91 /  20  20  10  20

&&

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

&&

SHORT TERM...WIMMER
AVIATION WX..BOWEN
IMPACT WX....GLITTO
LONG TERM....PENDERGRAST

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 2:42 PM EDT	Severe Thunderstorm Warning	MLB	Indian River, Okeechobee, Osceola	23 min

Nearby

Special Weather Statements in Florida, 2011 Every 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.