// Station · 57m ago

VTCT

Mae Fah Luang - Chiang Rai International Airport

CAT VFR

WIND 210° / 4 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 27°C / 23°C

ALTIM 29.77 inHg

ELEV 1,280 FT

19.9523°N / 99.8829°E

LOCATION · Chiang Rai, TH

WIND

210°4 kt

VTCT · 1,280 FT

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

METRIC

NOW · 12Z

+6H

+12H

+18H

WIND

210°/4

VIS

6+ SM

CEILING

—

LAYERS

SCT035

T / Td

27 / 23

ALTIM

29.77"

// Interpretation

VFR with light winds at 210°/4 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 VTCT 271200Z 21004KT 180V240 9999 SCT035 27/23 Q1008 NOSIG

VTCT · day 27 at 12:00 UTC · wind from 210° at 4 kt · visibility 6+ SM · scattered layer at 3,500 ft · temp 27°C / dewpoint 23°C · altimeter 29.77" Hg

// Runway analysis · computed from current METAR wind

Wind 210° @ 4 kt

ALL USABLE · WINDS CALM

WIND

210°4 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

03 HDG 030° —CALM —— 9,843'

21 HDG 210° —CALM —— 9,843'

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 +15°C

3,200FT

+1,920 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↘ -400 FT

24h AGO18h12h6hNOW

FIELD ELEV1,280 FT OAT+27°C ISA DELTA+15°C PRESSURE ALT1,434 FT

// Performance equivalent Your aircraft will perform as if it's at a field 3,200 ft high on a standard ISA day — that's +1,920 ft above VTCT's actual elevation.

// Aircraft performance impact SIGNIFICANT

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+32%

-22%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+22%

-14%

Light jetCJ4, Phenom 300, M2

+13%

-10%

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)

SCT035

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

// Computed

CEILING— HIGHEST LAYER3,500 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL14,916 ft VFR MARGINunlimited

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

22:42ZSUNRISE

05:19ZSOLAR NOON

11:55ZSUNSET

12:19ZCIVIL END

CURRENT12:57Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS12:19Z (past) DAY LENGTH13h 12m

Waxing Gibbous

ILLUMINATION83% MOONRISE07:29Z MOONSET20:42Z FULL MOON IN4 days

// Nearest reporting stations · 2 shown · 100 NM (sparse area)

VTCN

VFR

Nan Airport

WIND: 300° / 2 kt
VIS: 6+ SM
CEILING: FEW030
DIST: 86 NM SE
AGE: 57m ago

VTCC

VFR

Chiang Mai International Airport · Chiang Mai

WIND: 130° / 4 kt
VIS: 6+ SM
CEILING: BKN035
DIST: 88 NM SW
AGE: 27m ago

// Area map · 100 NM radius · CartoDB Dark Matter + aeronautical overlay

AIRSPACE

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