// Station · 3h 13m ago · STALE

VTSM

Samui International Airport

CAT VFR

WIND 300° / 5 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 29°C / 24°C

ALTIM 29.88 inHg

ELEV 64 FT

9.5478°N / 100.0620°E

LOCATION · Na Thon (Ko Samui Island), TH

WIND

300°5 kt

VTSM · 64 FT

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

METRIC

NOW · 15Z

+6H

+12H

+18H

WIND

300°/5

VIS

6+ SM

CEILING

—

LAYERS

FEW020

T / Td

29 / 24

ALTIM

29.88"

// Interpretation

VFR with light winds at 300°/5 kt. Visibility 6+ SM and a few 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 VTSM 251500Z 30005KT 9999 FEW020 29/24 Q1012 NOSIG

VTSM · day 25 at 15:00 UTC · wind from 300° at 5 kt · visibility 6+ SM · a few clouds at 2,000 ft · temp 29°C / dewpoint 24°C · altimeter 29.88" Hg

// Runway analysis · computed from current METAR wind

Wind 300° @ 5 kt

1 USABLE · 1 AVOID

WIND

300°5 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

35★ HDG 350° H3 kt X4 kt LEFT PRIMARY · 6,759'

TAILWIND ENDS · AVOID 1 ends

17 HDG 170° T3 kt X4 kt RIGHT —

Pattern altitude: 1,064 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

1,800FT

+1,736 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV64 FT OAT+29°C ISA DELTA+14°C PRESSURE ALT100 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 +1,736 ft above VTSM'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)

FEW020

Few · base 2,000 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER2,000 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL14,710 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC+7)

23:12ZSUNRISE

05:23ZSOLAR NOON

11:33ZSUNSET

11:55ZCIVIL END

CURRENT18:13Z DAYLIGHT REMAINING17h 20m VFR NIGHT BEGINS11:55Z (17h 41m) DAY LENGTH12h 21m

Waxing Gibbous

ILLUMINATION94% MOONRISE09:19Z MOONSET21:40Z 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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