Freeze Warning 5, NWS Miami, FL

063 
WWUS72 KMFL 230129
NPWMFL

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MIAMI FL
829 PM EST SAT DEC 22 2012

FLZ070-071-231400-
/O.UPG.KMFL.FR.Y.0003.121223T0600Z-121223T1400Z/
/O.EXA.KMFL.FZ.W.0005.121223T0700Z-121223T1400Z/
INLAND COLLIER-INLAND BROWARD-
INCLUDING THE CITY OF...IMMOKALEE
829 PM EST SAT DEC 22 2012

...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM EST SUNDAY...

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM 2 AM TO 9 AM EST SUNDAY. THE
FROST ADVISORY IS NO LONGER IN EFFECT. 

* TEMPERATURE...TEMPERATURES CONTINUE TO DROP THIS EVENING INTO
  THE UPPER 30S TO LOWER 40S OVER MOST OF THE NORTHERN INTERIOR
  AREAS OF SOUTH FLORIDA. THE TEMPERATURES WILL CONTINUE TO FALL
  TO NEAR OR JUST BELOW FREEZING LATE TONIGHT INTO EARLY SUNDAY
  MORNING...AS THE CENTER OF THE HIGH MOVES OVERHEAD FROM THE GULF
  OF MEXICO.

* IMPACTS...POTENTIAL DAMAGE TO CROPS AND OTHER SENSITIVE 
  VEGETATION AND PLANTS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS TEMPERATURES OF 32 DEGREES OR LOWER ARE
IMMINENT OR HIGHLY LIKELY...FOR ANY DURATION OF TIME. THESE
CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION.

&&

$$

FLZ063-066-067-231400-
/O.CON.KMFL.FZ.W.0005.121223T0700Z-121223T1400Z/
GLADES-HENDRY-INLAND PALM BEACH-
INCLUDING THE CITIES OF...MOORE HAVEN...CLEWISTON...PAHOKEE...
SOUTH BAY...BELLE GLADE...WELLINGTON
829 PM EST SAT DEC 22 2012

...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM EST
SUNDAY...

* TEMPERATURE...TEMPERATURES CONTINUE TO DROP THIS EVENING INTO
  THE UPPER 30S TO LOWER 40S OVER MOST OF THE NORTHERN INTERIOR
  AREAS OF SOUTH FLORIDA. THE TEMPERATURES WILL CONTINUE TO FALL
  TO NEAR OR JUST BELOW FREEZING LATE TONIGHT INTO EARLY SUNDAY
  MORNING...AS THE CENTER OF THE HIGH MOVES OVERHEAD FROM THE GULF
  OF MEXICO.

* IMPACTS...POTENTIAL DAMAGE TO CROPS AND OTHER SENSITIVE 
  VEGETATION AND PLANTS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS TEMPERATURES OF 32 DEGREES OR LOWER ARE
IMMINENT OR HIGHLY LIKELY...FOR ANY DURATION OF TIME. THESE
CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION.

&&

$$

FLZ174-231400-
/O.EXB.KMFL.FR.Y.0003.121223T0700Z-121223T1400Z/
FAR SOUTH MIAMI DADE-
829 PM EST SAT DEC 22 2012

...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EST SUNDAY...

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A FROST
ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 9 AM EST SUNDAY. 

* TEMPERATURE...TEMPERATURES ARE EXPECTED TO BE IN THE MID TO 
  UPPER 30S LATE TONIGHT INTO EARLY SUNDAY MORNING. 

* IMPACTS...POTENTIAL DAMAGE TO CROPS AND OTHER SENSITIVE 
  VEGETATION AND PLANTS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$

FLZ073-075-231400-
/O.EXT.KMFL.FR.Y.0003.121223T0700Z-121223T1400Z/
INLAND MIAMI DADE-MAINLAND MONROE-
829 PM EST SAT DEC 22 2012

...FROST ADVISORY NOW IN EFFECT FROM 2 AM TO 9 AM EST SUNDAY...

* TEMPERATURE...TEMPERATURES ARE EXPECTED TO BE IN THE MID TO 
  UPPER 30S LATE TONIGHT INTO EARLY SUNDAY MORNING. 

* IMPACTS...POTENTIAL DAMAGE TO CROPS AND OTHER SENSITIVE 
  VEGETATION AND PLANTS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$

BNB/CD

903 
WWUS72 KMFL 231205
NPWMFL

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MIAMI FL
705 AM EST SUN DEC 23 2012

...FREEZE WARNING CANCELED... 

FLZ063-066-067-070-071-231315-
/O.CAN.KMFL.FZ.W.0005.000000T0000Z-121223T1400Z/
GLADES-HENDRY-INLAND PALM BEACH-INLAND COLLIER-INLAND BROWARD-
INCLUDING THE CITIES OF...MOORE HAVEN...CLEWISTON...PAHOKEE...
SOUTH BAY...BELLE GLADE...WELLINGTON...IMMOKALEE
705 AM EST SUN DEC 23 2012

...FREEZE WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MIAMI HAS CAN CELLED THE FREEZE
WARNING. 

HIGH CLOUDS MOVING OVER SOUTH FLORIDA HAS ALLOWED TEMPERATURES TO
CREEP ABOVE FREEZING. 

$$

FLZ073-075-174-231315-
/O.CAN.KMFL.FR.Y.0003.000000T0000Z-121223T1400Z/
INLAND MIAMI DADE-MAINLAND MONROE-FAR SOUTH MIAMI DADE-
705 AM EST SUN DEC 23 2012

...FROST ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MIAMI HAS CAN CELLED THE FROST
ADVISORY. 

HIGH CLOUDS MOVING OVER SOUTH FLORIDA HAS ALLOWED TEMPERATURES TO
RISE PROHIBITING FROST FORMATION. 

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
629 PM EST SAT DEC 22 2012

.AVIATION...
VFR CONDITIONS TO PREVAIL AT ALL SITES OVER THE NEXT 24 HOURS. WINDS
ARE BECOMING LIGHTER ACROSS ALL TERMINAL SITES AND WILL STAY THAT
WAY THROUGH THE NIGHT AS THE HIGH PRESSURE CENTER MOVES OVER SOUTH
FLORIDA. EASTERLY WINDS RETURN TOMORROW AS THE HIGH QUICKLY PUSHES
OFF TO THE EAST.

&&

.PREV DISCUSSION... /ISSUED 142 PM EST SAT DEC 22 2012/

DISCUSSION...THE CURRENT COOL AIRMASS WILL REMAIN ACROSS SOUTH
FLORIDA THROUGH SUNDAY MORNING. A NEAR ZONAL FLOW WILL RETURN LATE
THIS WEEKEND AS THE MAIN TROUGH AXIS SHIFTS TO THE NORTHEAST WHILE
A SURFACE HIGH PRESSURE STRETCHES ACROSS NORTH AND CENTRAL FLORIDA
INTO THE ATLANTIC BY LATE TONIGHT. THIS WILL SET THE STAGE FOR
GOOD RADIATIONAL COOLING TONIGHT OVER SOUTH FLORIDA WITH VERY DRY
AIR, NEAR CALM WIND AND A MOSTLY CLEAR SKY. THAT BEING SAID, THE
CURRENT FORECAST MIGHT BE A TAD ON THE COLD SIDE AS TEMPERATURES
THIS MORNING RAN AROUND 3 TO 5 DEGREES WARMER THAN FORECAST AND
THEN TO DROP ANOTHER 5 TO 7 DEGREES 36 TO 48 HOURS AFTER THE COLD
FRONTAL PASSAGE IS RARE FOR SOUTH FLORIDA WITHOUT ADDITIONAL COLD
AIR ADVECTION. ANOTHER FACTOR IN THINKING OVERNIGHT TEMPERATURES
MAY BE ON THE COLD SIDE IS THAT ALL MODEL GUIDANCE INDICATES SOME
HIGH CLOUDS MOVING INTO THE REGION IN THE WEST-NORTHWEST FLOW
ALOFT AFTER MIDNIGHT TONIGHT WHICH WILL SLIGHTLY LIMIT THE AMOUNT
OF RADIATION THAT CAN OCCUR. THESE CLOUDS SHOW UP NICELY IN THE
SATELLITE IMAGES WITH THE LEADING EDGE OF LOUISIANA. THUS, WILL
CANCEL THE FREEZE WATCH AND REPLACE IT WITH A FROST ADVISORY WHICH
WILL ALSO INCLUDE INLAND PALM BEACH COUNTY MAINLY FOR THE AREA
SOUTH OF BELLE GLADE AND ACROSS THE NORTHERN PORTIONS OF COLLIER
COUNTY.

FOR SUNDAY, THE SURFACE RIDGE WILL SHIFT FARTHER TO THE EAST
INCREASING THE LOW LEVEL MOISTURE AND MODIFYING THE COOL AIR. THIS
BRINGS UP ANOTHER ISSUE. THE NAM IS UP TO ITS MESOSCALE BIAS TRICKS
AGAIN INCREASING THE LOW LEVEL MOISTURE AND SHOWING SCATTERED POPS
ALONG THE SOUTHEAST COAST. WHILE IT IS TRUE THE LOW LEVEL MOISTURE
WILL BE ON THE INCREASE, FORECAST SOUNDINGS SHOW INITIALLY THIS
MOISTURE TO REMAIN QUITE SHALLOW. IN FACT, EVEN THE NAM FORECAST
SOUNDING INDICATES THIS MOISTURE ONLY EXTENDING UP THROUGH AROUND 3K
FEET KEEPING ANY MENTION OF RAIN CHANCES EXTREMELY SLIM. SO THIS
FORECASTER WILL BE IGNORING THOSE NUMBERS AND GOING WITH JUST AN
INCREASE IN A STRATOCU FIELD.

THE SURFACE RIDGE WILL CONTINUE TO SHIFT EAST THROUGH MONDAY NIGHT
WITH A SLOW WARMING TREND. ANOTHER MID LATITUDE TROUGH WILL MOVE
ACROSS THE MID MISSISSIPPI VALLEY ON WEDNESDAY WITH ITS TRAILING
COLD FRONT MOVING INTO SOUTH FLORIDA. THERE WILL BE ONLY A SLIGHT
INCREASE IN DEEPER MOISTURE WITH A SLIGHT CHANCE OF A SHOWER. THE
FRONT AT THIS TIME DOES NOT APPEAR TO BE AS STRONG SO COOLING ON THE
ORDER OF 5 TO 10 DEGREES IS EXPECTED TOWARDS THE END OF THE HOLIDAY
WEEK.

MARINE...WIND AND SEAS WILL BE DIMINISHING THROUGH SUNDAY AS THE
PRESSURE GRADIENT RELAXES AND THE WIND VEERS TO A MORE EASTERLY
DIRECTION. WIND SPEEDS HAVE BEGUN TO FALL BELOW 20 KNOTS AND THE
SCA WILL BE ALLOWED TO EXPIRE FOR THE GULF WATERS, LAKE OKEECHOBEE
AND BISCAYNE BAY AT 21Z. RATHER TRANQUIL WIND AND SEAS WILL THEN
SET IN THROUGH THE FIRST PART OF THE WEEK.

FIRE WEATHER...RELATIVE HUMIDITY WILL REMAIN VERY LOW THIS
AFTERNOON WITH OCCASIONAL SUSTAINED NORTH WIND OF AROUND 15 MPH.
THE WIND WILL SHIFT TO THE EAST ON SUNDAY WITH LOW LEVEL MOISTURE
ON THE INCREASE. HOWEVER, LOWEST RH VALUES MAY FALL TO AROUND 35
PERCENT OVER THE NORTHWEST INTERIOR SUNDAY AFTERNOON.

&&

.PRELIMINARY POINT TEMPS/POPS...
WEST PALM BEACH  47  71  59  76 / 0 0 0 -
FORT LAUDERDALE  52  72  64  77 / 0 0 0 -
MIAMI            52  72  62  78 / 0 0 0 -
NAPLES           43  71  55  76 / 0 0 0 0

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...FROST ADVISORY FROM 2 AM TO 9 AM EST SUNDAY FOR GLADES-HENDRY-
     INLAND COLLIER-INLAND PALM BEACH.

AM...SMALL CRAFT ADVISORY UNTIL 1 AM EST SUNDAY FOR COASTAL WATERS
     FROM DEERFIELD BEACH TO OCEAN REEF, FL OUT 20 NM-COASTAL
     WATERS FROM JUPITER INLET TO DEERFIELD BEACH, FL OUT 20 NM-
     WATERS FROM DEERFIELD BEACH TO OCEAN REEF, FL EXTENDING
     FROM 20 NM TO THE TERRITORIAL WATERS OF THE BAHAMAS-WATERS
     FROM JUPITER INLET TO DEERFIELD BEACH, FL EXTENDING FROM 20
     NM TO 60 NM.

GM...NONE.
&&

DISCUSSION/MARINE/FIRE...54/BNB
AVIATION/RADAR...10/CD

HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
242 PM EST SAT DEC 22 2012

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
231100-
LAKE OKEECHOBEE-BISCAYNE BAY-
COASTAL WATERS FROM JUPITER INLET TO DEERFIELD BEACH, FL OUT 20 NM-
COASTAL WATERS FROM DEERFIELD BEACH TO OCEAN REEF, FL OUT 20 NM-
WATERS FROM JUPITER INLET TO DEERFIELD BEACH, FL EXTENDING FROM
20 NM TO 60 NM-
WATERS FROM DEERFIELD BEACH TO OCEAN REEF, FL EXTENDING FROM 20 NM
TO THE TERRITORIAL WATERS OF THE BAHAMAS-GLADES-HENDRY-
INLAND PALM BEACH-METRO PALM BEACH-COASTAL COLLIER-INLAND COLLIER-
INLAND BROWARD-METRO BROWARD-INLAND MIAMI DADE-METRO MIAMI DADE-
MAINLAND MONROE-COASTAL PALM BEACH-COASTAL BROWARD-
COASTAL MIAMI DADE-FAR SOUTH MIAMI DADE-
COASTAL WATERS FROM CHOKOLOSKEE TO BONITA BEACH, FL OUT 20 NM-
COASTAL WATERS FROM EAST CAPE SABLE TO CHOKOLOSKEE, FL OUT 20 NM-
GULF WATERS FROM CHOKOLOSKEE TO BONITA BEACH, FL EXTENDING FROM
20 TO 60 NM-
242 PM EST SAT DEC 22 2012

...TEMPERATURES IN THE 30S LAKE OKEECHOBEE REGION AND INLAND COLLIER...
...MODERATE RISK OF RIP CURRENTS ATLANTIC COAST...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

TEMPERATURES: LOW TEMPERATURES OVERNIGHT ARE FORECAST TO FALL TO
THE 30S IN THE LAKE OKEECHOBEE REGION AND AS FAR SOUTH AS INLAND
COLLIER COUNTY. LIGHT WINDS AND MOSTLY CLEAR SKIES WILL RESULT IN
AREAS OF FROST DEVELOPING LATE TONIGHT IN THESE AREAS.
TEMPERATURES ELSEWHERE WILL BE MOSTLY IN THE LOWER TO MID 40S.

RIP CURRENTS: A NORTHERLY SWELL OF 2 TO 4 FEET WILL RESULT IN A
MODERATE RISK OF RIP CURRENTS ALONG THE ATLANTIC COAST BEACHES
THROUGH TONIGHT.

WAVES: SEAS WILL REMAIN AROUND 7 FEET TONIGHT ACROSS THE ATLANTIC
WATERS, SUBSIDING TO BELOW 6 FEET ON SUNDAY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

TEMPERATURES WILL MODERATE SUNDAY THROUGH THE MIDDLE OF THE
UPCOMING WEEK.

SEAS MAY ONCE AGAIN INCREASE TO NEAR SMALL CRAFT ADVISORY LEVELS
TOWARD THE END OF NEXT WEEK BEHIND A COLD FRONT.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED. HOWEVER, ANY REPORTS OF
FROST ARE ENCOURAGED.

FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN
MIAMI WEBSITE AT WWW.WEATHER.GOV/MIAMI.

MOLLEDA