// Station · 19m ago

TNCM

Princess Juliana International Airport

CAT VFR

WIND 110° / 10 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 31°C / 25°C

ALTIM 30.03 inHg

ELEV 13 FT

18.0410°N / 63.1089°W

LOCATION · Sint Maarten, SX

WIND

110°10 kt

TNCM · 13 FT

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

METRIC

NOW · 16Z

+6H

+12H

+18H

WIND

110°/10

VIS

6+ SM

CEILING

—

LAYERS

SCT020

T / Td

31 / 25

ALTIM

30.03"

// Interpretation

VFR with moderate winds at 110°/10 kt. Visibility 6+ SM and scattered at 2,000 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 251600Z 11010KT 9999 SCT020 31/25 Q1017 NOSIG

TNCM · day 25 at 16:00 UTC · wind from 110° at 10 kt · visibility 6+ SM · scattered layer at 2,000 ft · temp 31°C / dewpoint 25°C · altimeter 30.03" Hg

// Runway analysis · computed from current METAR wind

Wind 110° @ 10 kt

1 USABLE · 1 AVOID

WIND

110°10 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

10★ HDG 100° H10 kt X2 kt RIGHT PRIMARY · 7,546'

TAILWIND ENDS · AVOID 1 ends

28 HDG 280° T10 kt X2 kt LEFT —

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 +16°C

1,800FT

+1,787 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV13 FT OAT+31°C ISA DELTA+16°C PRESSURE ALT-99 FT

// Performance equivalent Your aircraft will perform as if it's at a field 1,800 ft high on a standard ISA day — that's +1,787 ft above TNCM's actual elevation.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+18%

-13%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+13%

-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)

SCT020

Scattered · base 2,000 ft AGL · ~3–4 oktas

// Computed

CEILING— HIGHEST LAYER2,000 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL15,670 ft VFR MARGINunlimited

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

09:58ZSUNRISE

16:16ZSOLAR NOON

22:33ZSUNSET

22:56ZCIVIL END

CURRENT16:19Z DAYLIGHT REMAINING6h 14m VFR NIGHT BEGINS22:56Z (6h 37m) DAY LENGTH12h 35m

Waxing Gibbous

ILLUMINATION94% MOONRISE20:00Z MOONSET08:36Z FULL MOON IN2 days

// Nearest reporting stations

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

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