Special Weather Statement, NWS Miami, FL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
313 PM EDT SUN MAY 20 2012

.SHORT TERM...TONIGHT THROUGH MONDAY...LATEST WATER VAPOR IMAGE
SHOWS THAT DRY AIR HAS MOVED INTO THE LOCAL AREA AND THAT HAS
CONTRIBUTED TO LIMIT CONVECTIVE ACTIVITY SO FAR. STILL ISOLATED
TO SCT SHWRS AND TSTMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND
LINGER THROUGH THE EVENING HOURS. SIMILAR CONDITIONS SHOULD BE
EXPECTED ON MONDAY WITH THE PROBABILITY OF PRECIP BEING IN THE LOW
SCT CATEGORY. THE LOW LEVEL FLOW SHOULD ALSO BE MORE EASTERLY AND
SO ANY SHOWER OR STORM SHOULD TEND TO DEVELOP MORE TOWARD INLAND
AREAS. HOWEVER...THE STEERING FLOW IS STILL EXPECTED TO BE FROM
THE WEST AND THIS WILL PUSH ANY SHOWER/STORM EASTWARD OVER THE ERN
METRO AREAS.

.TUESDAY...GFS SHOWS A PERTURBATION IN THE LOW LEVEL EASTERLIES
OVER THE WESTERN CARIBBEAN WITH A LARGE AMOUNT OF MOISTURE
ASSOCIATED WITH. IT ALSO SHOWS AN UPPER TROUGH MOVING EAST ACROSS
SE U.S. AND PULLING THIS MOISTURE NORTHWARD OVER THE LOCAL AREA.
BELIEVE GFS MAY BE OVERDOING IT WITH THIS SCENARIO AND EVEN SHOWS
SOME SIGNS OF CONVECTIVE FEEDBACK. STILL...DECIDED TO INCREASE
POPS BUT WL NOT GO AS HIGH AS GFS AND ONLY INDICATE HIGH SCT POPS.

.LONG TERM...WEDNESDAY THROUGH SUNDAY...A DEEP LAYER RIDGE SHOULD
BUILD ACROSS THE REGION KEEPING ANY SYSTEM FROM APPROACHING THE
LOCAL AREA. ANY PRECIPITATION ACTIVITY SHOULD DEPEND ON LOCAL
EFFECTS SUCH AS SEA/LAKE BREEZES AND DIURNAL HEATING.

&&

.MARINE...EAST-SOUTHEAST SFC WINDS SHOULD REMAIN AT OR BELOW 15
KTS THROUGH MONDAY BUT THEN INCREASE CAUTION CRITERIA OVER THE
ATLANTIC WATERS TUESDAY. A SMALL N-NE SWELL GENERATED BY TROPICAL
STORMS ALBERTO SHOULD SPREAD SOUTH ACROSS THE TONIGHT THROUGH
TUESDAY.

&&

.FIRE WEATHER...NO PROBLEMS EXPECTED.

&&

.PRELIMINARY POINT TEMPS/POPS...
WEST PALM BEACH  70  84  73  86 / 20 20 20 40
FORT LAUDERDALE  72  86  74  86 / 30 30 30 50
MIAMI            73  87  74  87 / 30 30 30 50
NAPLES           70  87  73  88 / 20 20 20 30

&&

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

DISCUSSION/MARINE/FIRE...47/RGH
AVIATION/RADAR...60/BD

HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
333 PM EDT SUN MAY 20 2012

AMZ610-630-FLZ063-066>075-168-172>174-211045-
LAKE OKEECHOBEE-BISCAYNE BAY-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-
333 PM EDT SUN MAY 20 2012

...A FEW STRONG TO SEVERE THUNDERSTORMS POSSIBLE THROUGH EVENING...
...SLIGHT RISK OF RIP CURRENTS EAST COAST BEACHES...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS: SCATTERED THUNDERSTORMS ARE FORECAST TO DEVELOP
ACROSS SOUTH FLORIDA THIS AFTERNOON INTO EARLY THIS EVENING. THE
MAIN THREATS FROM ANY STRONG STORM THAT DEVELOPS WILL BE FREQUENT
LIGHTNING STRIKES, STRONG WIND GUSTS, HAIL, AND HEAVY RAINS.
THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS.

WIND: WIND GUSTS TO AROUND 60 MPH WILL BE POSSIBLE THIS AFTERNOON
INTO THIS EVENING WITH THE STRONGEST STORMS.

HAIL: LARGE HAIL IS POSSIBLE WITH A FEW OF THE STRONGEST STORMS
THIS AFTERNOON AND EVENING.

FLOODING: LOCALLY HEAVY RAINFALL WILL BE POSSIBLE WITH THE
THUNDERSTORMS THIS AFTERNOON INTO THIS EVENING, POSSIBLY
RESULTING IN ISOLATED STREET FLOODING AND FLOODING OF POOR
DRAINAGE AREAS.

RIP CURRENTS: THERE IS A SLIGHT RISK OF RIP CURRENTS AT THE EAST
COAST BEACHES.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

ISOLATED TO SCATTERED THUNDERSTORMS ARE IN THE FORECAST EACH DAY
WITH LIGHTNING AND LOCALIZED HEAVY RAINS BEING THE PRIMARY RISKS
AT THIS TIME.

THE RISK OF RIP CURRENTS WILL INCREASE ALONG THE EAST COAST
BEACHES THROUGH MUCH OF THIS PERIOD.

.SPOTTER INFORMATION STATEMENT...

WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED, HOWEVER
INDIVIDUAL SPOTTERS ARE ENCOURAGED TO REPORT HIGH WIND, HAIL AND
FLOODING TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
MIAMI.

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

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
702 PM EDT SUN MAY 20 2012

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

0659 PM     HAIL             HIALEAH                 25.86N 80.29W
05/20/2012  E0.50 INCH       MIAMI-DADE         FL   TRAINED SPOTTER

            DIME SIZED HAIL WAS REPORTED AT 16TH AVE AND 32ND ST IN
            WEST HIALEAH.

&&

CARACOZZA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
733 PM EDT SUN MAY 20 2012

FLZ073-074-173-174-210030-
COASTAL MIAMI DADE COUNTY FL FAR SOUTH MIAMI-DADE COUNTY FL INLAND
MIAMI-DADE COUNTY FL METROPOLITAN MIAMI DADE FL
733 PM EDT SUN MAY 20 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHERN MIAMI-DADE COUNTY

* UNTIL 830 PM EDT

* AT 729 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM
  WESTCHESTER TO 4 MILES NORTH OF PA-HAY OKEE OVERLOOK...AND MOVING
  SOUTHEAST AT 20 MPH.

* THE LINE OF STORMS WILL AFFECT...
  PA-HAY OKEE OVERLOOK...
  KENDALL...
  CUTLER RIDGE...
  CUTLER BAY...
  HOMESTEAD...
  FLORIDA CITY...
  AND SURROUNDING COMMUNITIES.

FREQUENT LIGHTNING...GUSTY WINDS FROM 45 TO 55 MPH...SMALL
HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF THESE ARE POSSIBLE.
LIGHTNING IS THE NUMBER ONE WEATHER RELATED KILLER IN FLORIDA. TREES
AND OPEN SHELTERS OFFER NO PROTECTION. THESE WINDS CAN DOWN SMALL
TREE LIMBS AND BRANCHES...AND BLOW AROUND UNSECURED SMALL OBJECTS.
SEEK SHELTER IN A SAFE BUILDING UNTIL THE STORM PASSES.

LAT...LON 2562 8028 2561 8030 2557 8030 2549 8033
      2544 8031 2540 8032 2540 8028 2539 8031
      2537 8028 2531 8037 2525 8039 2522 8048
      2519 8049 2522 8058 2517 8061 2518 8064
      2551 8086 2571 8024
TIME...MOT...LOC 2333Z 321DEG 23KT 2572 8033 2546 8079

MJB