// Station · 19m ago

VTCT

Mae Fah Luang - Chiang Rai International Airport

CAT VFR

WIND 160° / 3 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 26°C / 25°C

ALTIM 29.62 inHg

ELEV 1,280 FT

19.9523°N / 99.8829°E

LOCATION · Chiang Rai, TH

WIND

160°3 kt

VTCT · 1,280 FT

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

METRIC

NOW · 17Z

+6H

+12H

+18H

WIND

160°/3

VIS

6+ SM

CEILING

—

LAYERS

SCT045

T / Td

26 / 25

ALTIM

29.62"

// Interpretation

VFR with light winds at 160°/3 kt. Visibility 6+ SM and scattered at 4,500 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 111700Z 16003KT 140V200 9999 SCT045 26/25 Q1003 NOSIG

VTCT · day 11 at 17:00 UTC · wind from 160° at 3 kt · visibility 6+ SM · scattered layer at 4,500 ft · temp 26°C / dewpoint 25°C · altimeter 29.62" Hg

// Runway analysis · computed from current METAR wind

Wind 160° @ 3 kt

ALL USABLE · WINDS CALM

WIND

160°3 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 +14°C

3,300FT

+2,020 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↗ +400 FT

24h AGO18h12h6hNOW

FIELD ELEV1,280 FT OAT+26°C ISA DELTA+14°C PRESSURE ALT1,581 FT

// Performance equivalent Your aircraft will perform as if it's at a field 3,300 ft high on a standard ISA day — that's +2,020 ft above VTCT's actual elevation.

// Aircraft performance impact SIGNIFICANT

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+33%

-23%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+23%

-15%

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)

SCT045

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

// Computed

CEILING— HIGHEST LAYER4,500 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL14,411 ft VFR MARGINunlimited

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

22:49ZSUNRISE

05:27ZSOLAR NOON

12:04ZSUNSET

12:29ZCIVIL END

CURRENT17:19Z DAYLIGHT REMAINING18h 45m VFR NIGHT BEGINS12:29Z (19h 09m) DAY LENGTH13h 15m

Waning Crescent

ILLUMINATION10% MOONRISE20:19Z MOONSET09:34Z FULL MOON IN18 days

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

VTCC

VFR

Chiang Mai International Airport · Chiang Mai

WIND: 270° / 3 kt
VIS: 6+ SM
CEILING: SCT035
DIST: 88 NM SW
AGE: 19m ago

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

AIRSPACE

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