// Station · 6h 12m ago · STALE · HARD STALE

VLLN

Luang Namtha Airport

CAT VFR

WIND 180° / 2 kt

VIS 6+ SM

CEILING BKN at 10,000 ft

T/Td 25°C / 24°C

ALTIM 29.71 inHg

ELEV 1,968 FT

20.9670°N / 101.4000°E

LOCATION · Luang Namtha, LA

WIND

180°2 kt

VLLN · 1,968 FT

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

METRIC

NOW · 12Z

+6H

+12H

+18H

WIND

180°/2

VIS

6+ SM

CEILING

BKN100

LAYERS

SCT020 BKN100

T / Td

25 / 24

ALTIM

29.71"

// Interpretation

VFR — ceiling 10,000 ft. Light winds at 180°/2 kt, visibility 6+ SM, scattered at 2,000 ft, and broken at 10,000 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 VLLN 251200Z 18002KT 9999 SCT020 BKN100 25/24 Q1006 NOSIG

VLLN · day 25 at 12:00 UTC · wind from 180° at 2 kt · visibility 6+ SM · scattered layer at 2,000 ft · broken layer at 10,000 ft · temp 25°C / dewpoint 24°C · altimeter 29.71" Hg

// Runway analysis · computed from current METAR wind

Wind 180° @ 2 kt

ALL USABLE · WINDS CALM

WIND

180°2 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

18 HDG 180° —CALM —— 5,249'

36 HDG 360° —CALM —— 5,249'

Pattern altitude: 2,968 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

3,900FT

+1,932 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV1,968 FT OAT+25°C ISA DELTA+14°C PRESSURE ALT2,181 FT

// Performance equivalent Operating here right now feels like operating at VLXK (Xieng Khouang Airport, Xieng Khouang, elev 3,445 ft) on a standard ISA day.

// Aircraft performance impact SIGNIFICANT

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+39%

-27%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+27%

-18%

Light jetCJ4, Phenom 300, M2

+16%

-12%

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 · 2 reported · highest to lowest

// Reported layers (highest → lowest)

BKN100

Broken · base 10,000 ft AGL · ~5–7 oktas

SCT020

Scattered · base 2,000 ft AGL · ~3–4 oktas

// Computed

CEILING10,000 ft AGL HIGHEST LAYER10,000 ft TOTAL COVERAGE~83% (mostly covered) FREEZING LEVEL14,594 ft VFR MARGIN+7,000 ft

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

22:57ZSUNRISE

05:17ZSOLAR NOON

11:37ZSUNSET

12:00ZCIVIL END

CURRENT18:12Z DAYLIGHT REMAINING17h 25m VFR NIGHT BEGINS12:00Z (17h 48m) DAY LENGTH12h 40m

Waxing Gibbous

ILLUMINATION94% MOONRISE09:04Z MOONSET21:44Z 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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