Severe Thunderstorm Warning 94, NWS Miami, FL

000
WWUS52 KMFL 282112
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
507 PM EDT SAT JUN 28 2008

FLC099-282145-
/O.CON.KMFL.SV.W.0094.000000T0000Z-080628T2145Z/
PALM BEACH FL-
513 PM EDT SAT JUN 28 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTH CENTRAL PALM BEACH COUNTY...

AT 504 PM EDT...A SEVERE THUNDERSTORM NEAR PAHOKEE...MOVING 
SOUTHWEST AT 5 MPH.

THE SEVERE THUNDERSTORM HAS WEAKENED SOME BUT CONTINUES TO MOVE 
SOUTHWEST ALONG THE SHORE OF LAKE OKEECHOBEE. NORTHEAST WINDS WERE 
GUSTING UP TO 25 MPH ON THE LAKE. RADAR ESTIMATES OF 2 TO 3 INCHES 
OF RAIN HAS FALLEN IN LESS THAN 1 HOUR WITH THIS THUNDERSTORMS. 

MARINERS ON LAKE OKEECHOBEE NEED TO WATCH OUT FOR A WIND SHIFT AND 
HIGHER WINDS AND LAKE WATERS IN AREAS OF PRECIPITATION. THOSE 
TRAVELING ALONG U S 98 AND ON STATE ROUTE 715...729 AND 441 CAN 
EXPECT LOCALLY HEAVY RAINS AND GUSTY WINDS. 

LAT...LON 2678 8067 2680 8069 2684 8063 2696 8060
      2695 8047 2682 8049
TIME...MOT...LOC 2107Z 073DEG 4KT 2687 8060

$$

JR

000
WWUS52 KMFL 282134
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
532 PM EDT SAT JUN 28 2008

FLC099-282142-
/O.CAN.KMFL.SV.W.0094.000000T0000Z-080628T2145Z/
PALM BEACH FL-
532 PM EDT SAT JUN 28 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL PALM BEACH
COUNTY IS CANCELLED...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORM HAS
MOVED OUT OF THE WARNED AREA. THUS THE THUNDERSTORM WARNING HAS BEEN
CANCELLED.

THOUGH THE THUNDERSTORM HAS WEAKENED...IT WILL MOVE ACROSS EXTREME 
SOUTHERN LAKE OKEECHOBEE OVER LAKE HARBOR AND ACROSS U S 27. 
LOCALLY HEAVY RAIN AND GUSTY WINDS...POSSIBLY WITH SOME SMALL HAIL 
CAN BE EXPECTED. 

LAT...LON 2678 8067 2680 8069 2684 8063 2696 8060
      2695 8047 2682 8049
TIME...MOT...LOC 2132Z 073DEG 4KT 2686 8063

$$

JR

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE MIAMI FL
342 PM EDT SAT JUN 28 2008

...CORRECTED PRELIMINARY NUMBERS...

.DISCUSSION...CIMMS SAHARAN AIR LAYER (SAL) ANALYSIS SHOWS A
DISTINCT SAL OVER THE LOCAL AREA WHICH HAS BEEN PRESENT SINCE
EARLY FRI MORNING. VISIBLE SATELLITE IMAGERY CLEARLY SHOWS THIS AS
WELL WITH ONE AREA LOCALLY...WHICH SHOULD MOVE WEST OF THE AREA
TOMORROW...BUT ANOTHER AREA IS NOW SPREADING IN ACROSS PUERTO RICO
WHICH MODELS SUGGEST COULD MOVE INTO THE LOCAL AREA SOMETIME
TOWARDS THE LATTER HALF OF NEXT WEEK. THE SAL FEATURE IS NOT
UNCOMMON THIS TIME OF THE YEAR...TRACKING ALL THE WAY ACROSS THE
TROPICAL ATLANTIC FROM AFRICA. THE SAL IS PRODUCING HAZY SKIES
(LOOKS MILKY BUT NO VIS REDUCTIONS ATTM) ALONG WITH AN INVERSION
IN THE LOW LEVELS. THE MORNING MIAMI SOUNDING SHOWS THE INVERSION
BETWEEN 3300 AND AROUND 4000 FT WITH VERY DRY AIR ABOVE THE
INVERSION. MODIFYING THE SOUNDING SHOWS THAT THE CAP AGAIN WILL BE
TOUGH TO BREAK...AND WILL NEED TO WAIT FOR SEA/LAKE BREEZE
CONVERGENCE BOUNDARIES TO PROVIDE LIFT TO GET CONVECTION GOING
THIS AFTERNOON...MUCH LIKE YESTERDAY. SO NO SURPRISE THAT
CONVECTION HAS NOT YET DEVELOPED THIS AFTERNOON...BUT EXPECT THAT
IT WILL DO SO THROUGH EARLY THIS EVENING.

WHERE STORMS DEVELOP...FOCUSED ACROSS WESTERN INTERIOR
AREAS...THEY COULD BECOME STRONG DUE TO THE INSTABILITY PRESENT
ABOVE THE INVERSION. HOWEVER...H5 TEMPS HAVE WARMED 2C SINCE
YESTERDAY...SO SEVERE STORMS ARE LESS LIKELY THIS AFTERNOON. MID
LEVEL FLOW IS NORTHEASTERLY...SO STORMS THAT MANAGE TO DEVELOP
WILL TEND TO MOVE TOWARDS THE GULF COAST/NAPLES AREA AND INTO THE
GULF WATERS THIS EVENING. AFTER CONVECTION WANES THIS
EVENING...MOSTLY DRY WEATHER IS EXPECTED WITH JUST A SLIGHT CHANCE
OF STORMS ALONG THE ATLANTIC COAST OVERNIGHT.

SUNDAY AND BEYOND: MODELS SHOW THE SAL/STABLE LAYER MOVING AWAY
FROM THE AREA SUNDAY...SO THE INVERSION SHOULD BE GONE TOMORROW.
THIS WILL ALLOW FOR EARLIER DEVELOPMENT OF CONVECTION. PREVAILING
EAST FLOW WILL FOCUS CONVECTION OVER THE WESTERN HALF OF THE AREA
ON SUNDAY...SO KEPT POPS HIGHEST THERE. ON MONDAY...QUITE A BIT OF
CHANGES NOTED IN THE GFS RUNS....WITH POPS GOING FROM NEAR LIKELY
A FEW RUNS AGO TO NOW JUST SLIGHT CHANCE. DID NOT BITE FULLY
ON THIS...BUT A DOWNWARD TREND IN POPS IS IN ORDER...BECAUSE IT
DOES LOOK LIKE THE GFS HAS INITIALIZED WELL IN SHOWING A PWAT MIN
JUST EAST OF THE BAHAMAS (SHOWN IN THE MIMIC PWAT IMAGERY). THIS
SHOULD MOVE ACROSS MAINLAND SOUTH FLORIDA MONDAY...POSSIBLY LIMITING
CONVECTION THEN.

A LARGE TROUGH DIVING ACROSS THE EASTERN SEABOARD WILL INFLUENCE
OUR WEATHER TUE-WED...WITH THE FLOW BECOMING S-SW AND AFTERNOON
CONVECTION FOCUSING INTERIOR/EAST COAST. THEREAFTER...RIDGING
BUILDS IN AND GFS/ECMWF WIND/MOISTURE FIELDS SHOW THAT THE NEXT
EXTENSIVE AREA OF SAL OVER THE TROPICAL ATLANTIC...NOW LOCATED FROM
AROUND PUERTO RICO EASTWARD...WILL MOVE INTO THE AREA THURSDAY AND
REMAIN INTO AT LEAST THE FIRST PART OF NEXT WEEKEND. THIS WOULD
LIMIT CONVECTION SHOULD THIS COME TO FRUITION. MADE NO CHANGES IN
THE EXTENDED FCST GIVEN UNCERTAINTIES.

&&

.MARINE...WINDS WILL REMAIN LESS THAN 15 KT THROUGH THE PERIOD
WITH ASSOCIATED SEAS OF LESS THAN 4 FT EXPECTED.

&&

.FIRE WEATHER...TYPICALLY HIGH MOISTURE LEVELS FOR THIS TIME OF
THE YEAR WILL PRECLUDE ANY FIRE WX CONCERNS.

&&

.PRELIMINARY POINT TEMPS/POPS...
WEST PALM BEACH  80  90  79  88 / 10 30 30 30
FORT LAUDERDALE  83  89  81  89 / 10 30 30 30
MIAMI            82  90  80  89 / 10 30 30 30
NAPLES           75  92  74  92 / 30 50 30 50

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
AM...NONE.
GM...NONE.
&&

GREGORIA

HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
910 AM EDT SAT JUN 28 2008

FLZ063-066>075-168-172>174-290300-
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-
910 AM EDT SAT JUN 28 2008

...SCATTERED STORMS INTERIOR TODAY, WITH SOME POSSIBLY STRONG...
...MODERATE RISK FOR RIP CURRENTS ATLANTIC COAST BEACHES...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...TODAY AND TONIGHT

RIP CURRENTS: EAST SOUTHEAST WINDS AROUND 10 MPH WILL LEAD TO A
MODERATE RISK FOR RIP CURRENTS AT THE ATLANTIC COAST BEACHES
TODAY. SWIMMERS ARE URGED TO EXERCISE CAUTION DUE TO THE DANGERS
POSED BY RIP CURRENTS.

THUNDERSTORMS: SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS AREAS
FROM LAKE OKEECHOBEE TO THE GULF COAST LATE THIS AFTERNOON AND INTO
THE EVENING. HEAVY RAINFALL AND DANGEROUS CLOUD TO GROUND LIGHTNING
ARE LIKELY WITH ANY THUNDERSTORM ALONG WITH THE POSSIBILITY OF GUSTY
WINDS AND HAIL. ISOLATED THUNDERSTORMS ARE POSSIBLE ACROSS THE
MIAMI, FORT LAUDERDALE, AND WEST PALM BEACH METRO AREAS TONIGHT.

WIND: THE STRONGEST THUNDERSTORMS THIS AFTERNOON WILL BE CAPABLE
OF PRODUCING WIND GUSTS UP TO 50 MPH, WITH THE GREATEST CHANCES
ACROSS THE WESTERN INTERIOR.

HAIL: HAIL UP TO DIME SIZE IS POSSIBLE WITH THE STRONGEST
THUNDERSTORMS THIS AFTERNOON, WITH THE GREATEST CHANCES ACROSS THE
WESTERN INTERIOR.

FLOODING: THUNDERSTORMS THAT DO DEVELOP TODAY WILL BE SLOW MOVERS
DUE TO WEAK WINDS ALOFT. AS A RESULT, ANY THUNDERSTORM WILL HAVE
THE POTENTIAL TO DROP HEAVY AMOUNTS OF RAINFALL IN SHORT PERIODS
OF TIME, LEADING TO HEAVY PONDING OF WATER ON ROADWAYS AND MINOR
ROAD FLOODING, MAINLY ACROSS INTERIOR LOCATIONS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

CHANCES FOR THUNDERSTORMS WILL REMAIN HIGHEST ACROSS WESTERN
LOCATIONS ON SUNDAY. THE PATTERN WILL SHIFT EARLY IN THE WEEK,
POTENTIALLY BRINGING HIGHER CHANCES FOR THUNDERSTORMS BACK TO THE
EAST COAST METRO AREAS MONDAY THROUGH WEDNESDAY. A RETURN TO MORE
WESTERN ACTIVITY IS EXPECTED LATER IN THE WEEK.

EAST SOUTHEAST WINDS WILL CONTINUE THE RISK FOR RIP CURRENTS AT
THE ATLANTIC BEACHES AT LEAST THROUGH EARLY THIS WEEK. SWIMMERS
ARE URGED TO EXERCISE CAUTION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY.

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