087
FXUS62 KMFL 040520
AFDMFL
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
120 AM EDT SUN OCT 4 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 1257 AM EDT SUN OCT 4 2026
- A HIGH RISK OF RIP CURRENTS IS NOW IN EFFECT ACROSS THE
ATLANTIC COAST BEACHES THROUGH SUNDAY EVENING.
- ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL REMAIN
POSSIBLE EACH DAY THROUGH THE REST OF THE WEEKEND. THE HIGHEST
CHANCES WILL REMAIN DURING THE AFTERNOON AND EVENING HOURS
OVER THE INTERIOR AS WELL AS SOUTHWEST FLORIDA.
- HIGH TEMPERATURES WILL REACH THE LOW 90S IN MANY AREAS OF SOUTH
FLORIDA, ALONG WITH HEAT INDEX VALUES IN THE LOW-MID 100S EACH
DAY.
SHORT TERM
(REST OF TODAY THROUGH SUNDAY)
ISSUED AT 104 PM EDT SAT OCT 3 2026
FORECAST CONTINUES TO LOOK ON TRACK WITH PREVIOUS DISCUSSIONS. AN
UPPER-LEVEL (250-300 MB) RIDGE AXIS CENTERED OVER THE EASTERN GULF
HAVE ACTED AS A MODE OF TRANSPORT FOR A DENSE CIRRUS DECK INTO OUR
SOUTH FLORIDA SKIES FROM BILLOWING CONVECTION OVER THE CORRESPONDING
MARINE ENVIRONMENT. BREEZY EAST-SOUTHEASTERLY SURFACE FLOW CONTINUES
TO BE OBSERVED ACROSS THE REGION TODAY DUE TO A TIGHT PRESSURE
GRADIENT AS WE REMAINED SANDWICHED BETWEEN SUBTROPICAL RIDGING TO
OUR EAST AND ANOMALOUSLY LOW MSLPS OVER THE WESTERN GULF. ASIDE FROM
OUR INSTABILITY-LATENT ATLANTIC WATERS FROM WHICH A FEW SHOWERS HAVE
FORMED AND MOVED ONSHORE, THEY HAVE PROVEN TO BE NOTHING MORE THAN
JUST A NUISANCE FOR IMPACTED PORTIONS OF OUR EAST COAST METROS SINCE
THIS MORNING. OVER MAINLAND SOUTH FLORIDA, CONVECTION HAS BEEN HARD
TO COME BY THUS FAR TODAY DUE TO LOW TO MID-LEVEL DRY AIR THAT HAS
BEEN MADE EVIDENT ON BOTH THE 12Z MFL AND REGIONAL ACARS SOUNDINGS.
ALTHOUGH WE WILL BE SEEING ENOUGH SUNSHINE PEAK THROUGH THE
AFOREMENTIONED CLOUD CANOPY THROUGHOUT THE AFTERNOON (AND SURFACE-
BASED CAPE VALUES CLIMBING INTO THE 2500-3500 J/KG), THIS LINGERING
DRY AIR (AS PER FORECAST SOUNDINGS) AND OVERALL POOR LOW-LEVEL
DYNAMICS (0-3KM LAPSE RATES OF 6.5-7.0C/KM) SHOULD KEEP SHOWERS
ISOLATED TO SCATTERED IN NATURE AND THUNDERSTORMS (DUE TO LACK OF
SATURATION IN THE FIRST 5-6 KM OF THE VERTICAL COLUMN) FEW AND FAR
IN BETWEEN. THE SHOWERS AND ISOLATED THUNDERSTORMS THAT DO DEVELOP
THROUGH SUNSET SHOULD BE FAVORING THE LAKE OKEECHOBEE REGION AND
SOUTHWEST FLORIDA (DOWNWIND OF OUR SWIFT EAST-SOUTHEASTERLY FLOW
BOTH AT THE SURFACE AND ALOFT) WITH POPS RANGING BETWEEN 20 AND 50%.
THE STRENGTH OF OUR SUPERFICIAL SE FLOW SHOULD MOSTLY OFFSET OUR
GULF SEA BREEZE AND THEREBY PREVENT CONVECTION ALONG THE IMMEDIATE
GULF COAST LATER THIS AFTERNOON FROM DUMPING ANY SIGNIFICANT
RAINFALL TOTALS AND INSTEAD, ALLOW THESE SHOWERS AND/OR STORMS TO BE
MORE TRANSIENT IN NATURE.
MARGINAL POPS WILL BE KEPT ALONG THE IMMEDIATE EAST COAST OVERNIGHT
INTO SUNDAY MORNING TO HIGHLIGHT THE POTENTIAL FOR THIS REPEAT
PATTERN OF NOCTURNAL SHOWER ACTIVITY OVER THE ATLANTIC MOVING
ONSHORE AND AFFECTING PRIMARILY COASTAL PALM BEACH AND BROWARD ALONG
OUR PREVAILING SE FLOW. MORE OVERALL SUNSHINE WILL BE RETURNING TO
THE FORECAST TOMORROW AS THE MODELS ARE HINTING AT THE INTRUSION OF
SOME DRIER AIR INTO SOUTH FLORIDA ON THE SOUTH/SOUTHWESTERN FLANK OF
MID-LEVEL RIDGING OVER OUR NEARSHORE ATLANTIC WATERS. PERSISTING SE
FLOW (AND PROGRESSIVELY BECOMING MORE EASTERLY ALOFT) SHOULD AGAIN
ALLOW ISOLATED TO SCATTERED SHOWERS TO FAVOR THE WESTERN HALF OF
SOUTH FLORIDA MAINLY DURING THE AFTERNOON HOURS (POPS OF 30-50%) AND
FOR OUR EAST COAST METROS TO STAY RELATIVELY DRY THROUGHOUT THIS
SAME TIME PERIOD (POPS OF 10-20%). SIMILAR TO TODAY, THUNDERSTORMS
SHOULD BE RATHER ISOLATED IN NATURE DUE TO THE AFOREMENTIONED
AMBIENT DRY AIR ALOFT AND LACK OF SUFFICIENT FORCING IN THE LOW
LEVELS PREVENTING SUBSTANTIAL VERTICAL GROWTH. HIGHS SHOULD BE
PEAKING IN THE UPPER 80S TO LOW 90S BOTH TODAY AND SUNDAY WITH HEAT
INDEX VALUES AT OR BARELY SURPASSING 100F.
LONG TERM
(SUNDAY NIGHT THROUGH FRIDAY)
ISSUED AT 405 AM EDT SAT OCT 3 2026
THE DOMINANCE OF THE HIGH PRESSURE RIDGE TO THE NORTH OF SOFLO WILL
FINALLY BREAK DOWN ON MONDAY AS GUIDANCE WEAKENS THE MID-LVL RIDGE
ACROSS THE SE CONUS DUE TO A DEVELOPING TROUGH/LOW COMPLEX. AN
ASSOCIATED SFC COLD FRONT IS SHOWN GRADUALLY MIGRATING SOUTHWARD AND
BECOMING STATIONARY ALONG THE NORTHERN PORTIONS OF THE PENINSULA.
GLOBAL MODELS SHOW A POTENTIAL LOW DEVELOPING ALONG THE STALLED
FRONT AROUND NE FLORIDA, AND SLOWLY MIGRATING NORTHWARD ACROSS THE
WEST ATLANTIC DURING THE FIRST HALF OF THE WORK WEEK. THE INFLUENCE
OF THE LOW WILL KEEP ONGOING TROPICAL MOISTURE ADVECTION ACROSS THE
STATE. NBM RESPONDS TO THIS SCENARIO BY PUSHING HIGHEST AFTERNOON
POPS INTO THE 80-90% RANGE EACH DAY THROUGH THE END OF THE WORK
WEEK. COVERAGE BECOMES WIDESPREAD ACROSS SOFLO BY TUESDAY.
WITH THE WEAKENING OF THE RIDGE TO THE NORTH AND THE AFOREMENTIONED
LOW GRADUALLY PUSHING NORTHWARD, PRESSURE GRADIENTS OVER THE AREA
WILL WEAKEN AND BRING WINDS ACROSS SOFLO TO A LIGHT FLOW OR EVEN
CALM AT TIMES DURING MUCH OF THE WORK WEEK. THIS WILL ALLOW FOR
AFTERNOON SEA BREEZE AND STORM OUTFLOW BOUNDARIES TO DRIVE STORM
DEVELOPMENT AND MOTION. MAIN HAZARDS WILL INCLUDE DAMAGING GUSTS,
LIGHTNING STRIKES, AND LOCALIZED FLOODING.
TEMPERATURES SEEM TO REMAIN WARM WITH AFTERNOON HIGHS IN THE UPPER
80S TO LOW 90S, ALONG WITH HEAT INDEX VALUES IN THE LOW-MID
100S.
AVIATION
(06Z TAFS)
ISSUED AT 115 AM EDT SUN OCT 4 2026
BRIEF MVFR PERIODS ARE STILL POSSIBLE AT THE ATLANTIC TERMINALS
THROUGH AROUND 14Z WITH PASSING COASTAL SHOWERS, THEN VFR SHOULD
PREVAIL FOR THE REST OF TODAY. APF MAY EXPERIENCE PERIODS OF STRONGER
RESTRICTIONS AND ERRATIC WINDS AS CHANCES OF THUNDERSTORMS WILL
BE SIGNIFICANTLY HIGHER, MAINLY AFTER 18Z. VFR THEN PREVAILS AND
WINDS BECOMING L/V AFTER 02-03Z TONIGHT.
MARINE
ISSUED AT 405 AM EDT SAT OCT 3 2026
A MODERATE TO FRESH EAST SOUTHEASTERLY BREEZE WILL CONTINUE ACROSS
MOST OF THE LOCAL WATERS THROUGH THE REST OF THE WEEKEND. THESE
WINDS WILL GRADUALLY DIMINSH EARLY NEXT WEEK, AND THEY COULD BECOME
SOUTH SOUTHWESTERLY ACROSS THE GULF WATERS DURING THIS TIME FRAME.
SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE EACH DAY
THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK ACROSS MOST OF THE
LOCAL WATERS.
GULF STREAM HAZARDS: NONE.
BEACHES
ISSUED AT 404 AM EDT FRI OCT 2 2026
A HIGH RISK IF RIP CURRENTS IS NOW IN EFFECT FOR ALL ATLANTIC
BEACHES THROUGH SUNDAY EVENING. PLEASE FOLLOW ALL POSTED SAFETY
MEASURES AT LOCAL BEACHES.
PRELIMINARY POINT TEMPS/POPS
MIAMI 78 90 77 89 / 10 40 20 60
WEST KENDALL 77 90 76 89 / 10 40 20 60
OPA-LOCKA 78 90 77 90 / 10 40 30 70
HOMESTEAD 78 89 77 89 / 10 30 10 50
FORT LAUDERDALE 78 89 77 89 / 10 40 30 70
N FT LAUDERDALE 78 90 77 89 / 10 50 30 70
PEMBROKE PINES 77 90 76 89 / 10 40 30 70
WEST PALM BEACH 77 90 76 90 / 10 60 40 80
BOCA RATON 78 89 76 89 / 10 50 40 70
NAPLES 75 88 76 87 / 30 30 30 60
MFL WATCHES/WARNINGS/ADVISORIES
FL...HIGH RIP CURRENT RISK THROUGH THIS EVENING FOR FLZ168-172-173.
AM...NONE.
GM...NONE.
SHORT TERM...AD
LONG TERM....17
AVIATION...17
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