// Station · 10m ago

VTCT

Mae Fah Luang - Chiang Rai International Airport

CAT VFR

WIND 210° / 5 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 26°C / 23°C

ALTIM 29.74 inHg

ELEV 1,280 FT

19.9523°N / 99.8829°E

LOCATION · Chiang Rai, TH

WIND

210°5 kt

VTCT · 1,280 FT

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

METRIC

NOW · 18Z

+6H

+12H

+18H

WIND

210°/5

VIS

6+ SM

CEILING

—

LAYERS

SCT040

T / Td

26 / 23

ALTIM

29.74"

// Interpretation

VFR with light winds at 210°/5 kt. Visibility 6+ SM and scattered at 4,000 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 VTCT 251800Z 21005KT 9999 SCT040 26/23 Q1007 NOSIG

VTCT · day 25 at 18:00 UTC · wind from 210° at 5 kt · visibility 6+ SM · scattered layer at 4,000 ft · temp 26°C / dewpoint 23°C · altimeter 29.74" Hg

// Runway analysis · computed from current METAR wind

Wind 210° @ 5 kt

1 USABLE · 1 AVOID

WIND

210°5 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

21★ HDG 210° H5 kt X0 kt — PRIMARY · 9,843'

TAILWIND ENDS · AVOID 1 ends

03 HDG 030° T5 kt X0 kt — —

Pattern altitude: 2,280 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

3,100FT

+1,820 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV1,280 FT OAT+26°C ISA DELTA+14°C PRESSURE ALT1,463 FT

// Performance equivalent Your aircraft will perform as if it's at a field 3,100 ft high on a standard ISA day — that's +1,820 ft above VTCT's actual elevation.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+31%

-22%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+22%

-14%

Light jetCJ4, Phenom 300, M2

+12%

-9%

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)

SCT040

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

// Computed

CEILING— HIGHEST LAYER4,000 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL14,411 ft VFR MARGINunlimited

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

23:04ZSUNRISE

05:23ZSOLAR NOON

11:43ZSUNSET

12:05ZCIVIL END

CURRENT18:10Z DAYLIGHT REMAINING17h 32m VFR NIGHT BEGINS12:05Z (17h 54m) DAY LENGTH12h 38m

Waxing Gibbous

ILLUMINATION94% MOONRISE09:11Z 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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