// Station · 1h 3m ago · STALE

ROYN

Yonaguni Airport

CAT VFR

WIND 350° / 7 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 27°C / 20°C

ALTIM 30.03 inHg

ELEV 70 FT

24.4673°N / 122.9798°E

LOCATION · Yonaguni, JP

WIND

350°7 kt

ROYN · 70 FT

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

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

350°/7

VIS

6+ SM

CEILING

—

LAYERS

FEW033

T / Td

27 / 20

ALTIM

30.03"

// Interpretation

VFR with light winds at 350°/7 kt. Visibility 6+ SM and a few at 3,300 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 ROYN 130000Z AUTO 35007KT 9999 FEW033 27/20 Q1017

ROYN · day 13 at 00:00 UTC · wind from 350° at 7 kt · visibility 6+ SM · a few clouds at 3,300 ft · temp 27°C / dewpoint 20°C · altimeter 30.03" Hg

// Runway analysis · computed from current METAR wind

Wind 350° @ 7 kt

2 USABLE · 0 AVOID · 2 CAUTION

WIND

350°7 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 2 usable

08★ HDG 080° H0 kt X7 kt LEFT PRIMARY · 4,920'

26 HDG 260° H0 kt X7 kt RIGHT ⚠ HIGH XW · 100%

Pattern altitude: 1,070 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

1,400FT

+1,330 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV70 FT OAT+27°C ISA DELTA+12°C PRESSURE ALT-42 FT

// Performance equivalent Operating here right now feels like operating at RJFK (Kagoshima Airport, Kagoshima, elev 906 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+14%

-10%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+10%

-6%

Light jetCJ4, Phenom 300, M2

+6%

-4%

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)

FEW033

Few · base 3,300 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER3,300 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL13,706 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC+8)

21:45ZSUNRISE

03:35ZSOLAR NOON

09:25ZSUNSET

09:48ZCIVIL END

CURRENT01:03Z DAYLIGHT REMAINING8h 22m VFR NIGHT BEGINS09:48Z (8h 45m) DAY LENGTH11h 39m

Waxing Crescent

ILLUMINATION3% MOONRISE23:06Z MOONSET10:46Z 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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