// Station · 30m ago

VTCC

Chiang Mai International Airport

CAT VFR

WIND VRB / 2 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 26°C / 23°C

ALTIM 29.77 inHg

ELEV 1,036 FT

18.7668°N / 98.9626°E

LOCATION · Chiang Mai, TH

WIND

VRB2 kt

VTCC · 1,036 FT

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

METRIC

NOW · 16Z

+6H

+12H

+18H

WIND

VRB/2

VIS

6+ SM

CEILING

—

LAYERS

SCT035

T / Td

26 / 23

ALTIM

29.77"

// Interpretation

VFR with light winds at variable/2 kt. Visibility 6+ SM and scattered at 3,500 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 VTCC 251630Z VRB02KT 9999 SCT035 26/23 Q1008 NOSIG

VTCC · day 25 at 16:30 UTC · wind variable at 2 kt · visibility 6+ SM · scattered layer at 3,500 ft · temp 26°C / dewpoint 23°C · altimeter 29.77" Hg

// Runway analysis · computed from current METAR wind

Wind VRB @ 2 kt

ALL USABLE · WINDS CALM

WIND

VRB2 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

18 HDG 180° —CALM —— 11,155'

36 HDG 360° —CALM —— 11,155'

Pattern altitude: 2,036 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 +13°C

2,800FT

+1,764 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV1,036 FT OAT+26°C ISA DELTA+13°C PRESSURE ALT1,190 FT

// Performance equivalent Your aircraft will perform as if it's at a field 2,800 ft high on a standard ISA day — that's +1,764 ft above VTCC's actual elevation.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+28%

-20%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+20%

-13%

Light jetCJ4, Phenom 300, M2

+11%

-8%

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)

SCT035

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

// Computed

CEILING— HIGHEST LAYER3,500 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL14,167 ft VFR MARGINunlimited

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

23:09ZSUNRISE

05:27ZSOLAR NOON

11:45ZSUNSET

12:08ZCIVIL END

CURRENT17:00Z DAYLIGHT REMAINING18h 45m VFR NIGHT BEGINS12:08Z (19h 07m) DAY LENGTH12h 36m

Waxing Gibbous

ILLUMINATION94% MOONRISE09:13Z MOONSET21:49Z 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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