// Station · 6h 3m ago · STALE · HARD STALE

VTCH

Mae Hong Son Airport

CAT VFR

WIND 160° / 4 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 31°C / 25°C

ALTIM 29.59 inHg

ELEV 929 FT

19.3013°N / 97.9758°E

LOCATION · Mae Hong Son, TH

WIND

160°4 kt

VTCH · 929 FT

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

METRIC

NOW · 11Z

+6H

+12H

+18H

WIND

160°/4

VIS

6+ SM

CEILING

—

LAYERS

SCT025

T / Td

31 / 25

ALTIM

29.59"

// Interpretation

VFR with light winds at 160°/4 kt. Visibility 6+ SM and scattered at 2,500 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 VTCH 111100Z 16004KT 100V210 9999 SCT025 31/25 Q1002 NOSIG

VTCH · day 11 at 11:00 UTC · wind from 160° at 4 kt · visibility 6+ SM · scattered layer at 2,500 ft · temp 31°C / dewpoint 25°C · altimeter 29.59" Hg

// Runway analysis · computed from current METAR wind

Wind 160° @ 4 kt

ALL USABLE · WINDS CALM

WIND

160°4 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

11 HDG 110° —CALM —— 6,562'

29 HDG 290° —CALM —— 6,562'

Pattern altitude: 1,929 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 +18°C

3,500FT

+2,571 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↗ +1,000 FT

24h AGO18h12h6hNOW

FIELD ELEV929 FT OAT+31°C ISA DELTA+18°C PRESSURE ALT1,260 FT

// Performance equivalent Your aircraft will perform as if it's at a field 3,500 ft high on a standard ISA day — that's +2,571 ft above VTCH's actual elevation.

// Aircraft performance impact SIGNIFICANT

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+35%

-25%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+25%

-16%

Light jetCJ4, Phenom 300, M2

+14%

-11%

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.

// Cloud layers · 1 reported · highest to lowest

// Reported layers (highest → lowest)

SCT025

Scattered · base 2,500 ft AGL · ~3–4 oktas

// Computed

CEILING— HIGHEST LAYER2,500 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL16,586 ft VFR MARGINunlimited

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

22:58ZSUNRISE

05:34ZSOLAR NOON

12:11ZSUNSET

12:35ZCIVIL END

CURRENT17:03Z DAYLIGHT REMAINING19h 07m VFR NIGHT BEGINS12:35Z (19h 31m) DAY LENGTH13h 12m

Waning Crescent

ILLUMINATION10% MOONRISE20:28Z MOONSET09:40Z FULL MOON IN18 days

// Nearest reporting stations · 1 shown · 100 NM (sparse area)

VTCC

VFR

Chiang Mai International Airport · Chiang Mai

WIND: 210° / 3 kt
VIS: 6+ SM
CEILING: SCT035
DIST: 65 NM SE
AGE: 33m ago

// Area map · 80 NM radius · CartoDB Dark Matter + aeronautical overlay

AIRSPACE

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