// Station · 1h 3m ago · STALE

VTUD

Udon Thani International Airport

CAT MVFR

WIND CALM

VIS 5.0 SM

CEILING Few/scattered only

T/Td 26°C / 24°C

ALTIM 29.97 inHg

ELEV 579 FT

17.3862°N / 102.7886°E

LOCATION · Udon Thani, TH

WIND

000°0 kt

VTUD · 579 FT

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

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

CALM

VIS

5.0 SM

CEILING

—

LAYERS

FEW045

T / Td

26 / 24

ALTIM

29.97"

// Interpretation

MVFR — visibility 5.0 SM. Winds calm, visibility 5.0 SM, a few at 4,500 ft. Would drop to IFR below 1,000 ft ceiling or 3 SM visibility, or rise back to VFR above 3,000 ft and 5 SM.

Loading TAF forecast narrative…

SOURCES · NOAA Aviation Weather Center METAR (TAF loading…)

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// Raw observation METAR string + decoded

METAR VTUD 130000Z 00000KT 8000 FEW045 26/24 Q1015 NOSIG

VTUD · day 13 at 00:00 UTC · winds calm · visibility 5.0 SM · a few clouds at 4,500 ft · temp 26°C / dewpoint 24°C · altimeter 29.97" Hg

// Runway analysis · computed from current METAR wind

Wind CALM

ALL USABLE · WINDS CALM

WIND

000°calm

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

12 HDG 120° —CALM —— 10,000'

30 HDG 300° —CALM —— 10,000'

Pattern altitude: 1,579 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 +12°C

2,000FT

+1,421 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV579 FT OAT+26°C ISA DELTA+12°C PRESSURE ALT526 FT

// Performance equivalent Your aircraft will perform as if it's at a field 2,000 ft high on a standard ISA day — that's +1,421 ft above VTUD's actual elevation.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+20%

-14%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+14%

-9%

Light jetCJ4, Phenom 300, M2

+8%

-6%

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)

FEW045

Few · base 4,500 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER4,500 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL13,710 ft VFR MARGINunlimited

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

23:02ZSUNRISE

04:56ZSOLAR NOON

10:50ZSUNSET

11:12ZCIVIL END

CURRENT01:03Z DAYLIGHT REMAINING9h 47m VFR NIGHT BEGINS11:12Z (10h 08m) DAY LENGTH11h 47m

Waxing Crescent

ILLUMINATION3% MOONRISE00:23Z MOONSET12:11Z FULL MOON IN13 days

// Nearest reporting stations

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// Area map · 60 NM radius · CartoDB Dark Matter + aeronautical overlay

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