// Station · 30m ago

TNCM

Princess Juliana International Airport

CAT VFR

WIND 090° / 5 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 29°C / 25°C

ALTIM 29.94 inHg

ELEV 13 FT

18.0410°N / 63.1089°W

LOCATION · Sint Maarten, SX

WIND

090°5 kt

TNCM · 13 FT

// Current + 24h forecast · METAR loaded · TAF loading…

METRIC

NOW · 02Z

+6H

+12H

+18H

WIND

090°/5

VIS

6+ SM

CEILING

—

LAYERS

FEW016

T / Td

29 / 25

ALTIM

29.94"

// Interpretation

VFR with light winds at 090°/5 kt. Visibility 6+ SM and a few at 1,600 ft. Would shift to MVFR if the ceiling drops to 3,000 ft or visibility below 5 SM.

Loading TAF forecast narrative…

SOURCES · NOAA Aviation Weather Center METAR (TAF loading…)

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// Raw observation METAR string + decoded

METAR TNCM 130200Z 09005KT 9999 FEW016 29/25 Q1014

TNCM · day 13 at 02:00 UTC · wind from 090° at 5 kt · visibility 6+ SM · a few clouds at 1,600 ft · temp 29°C / dewpoint 25°C · altimeter 29.94" Hg

// Runway analysis · computed from current METAR wind

Wind 090° @ 5 kt

1 USABLE · 1 AVOID

WIND

090°5 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

10★ HDG 100° H5 kt X1 kt LEFT PRIMARY · 7,546'

TAILWIND ENDS · AVOID 1 ends

28 HDG 280° T5 kt X1 kt RIGHT —

Pattern altitude: 1,013 ft MSL (1,000 ft AGL). Verify pattern direction and altitude with the chart supplement before flying. // On calm winds (<3 kt), all runways are usable — favor the longest or whatever the pattern calls for.

// Density altitude · ISA +14°C

1,700FT

+1,687 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↗ +100 FT

24h AGO18h12h6hNOW

FIELD ELEV13 FT OAT+29°C ISA DELTA+14°C PRESSURE ALT-10 FT

// Performance equivalent Your aircraft will perform as if it's at a field 1,700 ft high on a standard ISA day — that's +1,687 ft above TNCM's actual elevation.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+17%

-12%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+12%

-8%

Light jetCJ4, Phenom 300, M2

+7%

-5%

Approximate using ~10% perf loss / 1,000 ft DA for normally aspirated, scaled by powerplant type. Verify with your aircraft's POH for accurate numbers — especially above 5,000 ft DA where these rules of thumb diverge. Severity rating assumes a standard altimeter setting (29.92" Hg / 1013 hPa); a non-standard setting shifts the effective altitude by roughly 1,000 ft per 1" Hg of deviation.

// Cloud layers · 1 reported · highest to lowest

// Reported layers (highest → lowest)

FEW016

Few · base 1,600 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER1,600 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL14,659 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-4)

10:06ZSUNRISE

16:00ZSOLAR NOON

21:53ZSUNSET

22:15ZCIVIL END

CURRENT02:30Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS22:15Z (past) DAY LENGTH11h 47m

Waxing Crescent

ILLUMINATION3% MOONRISE11:30Z MOONSET23:17Z FULL MOON IN13 days

// Nearest reporting stations

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// Area map · 60 NM radius · CartoDB Dark Matter + aeronautical overlay

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