// Station · 10m ago

ROYN

Yonaguni Airport

CAT MVFR

WIND 350° / 13 kt

VIS 6+ SM

CEILING BKN at 1,300 ft

T/Td 28°C / 26°C

ALTIM 29.65 inHg

ELEV 70 FT

24.4673°N / 122.9798°E

LOCATION · Yonaguni, JP

WIND

350°13 kt

ROYN · 70 FT

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

METRIC

NOW · 18Z

+6H

+12H

+18H

WIND

350°/13

VIS

6+ SM

CEILING

BKN013

LAYERS

SCT011 BKN013 BKN017

T / Td

28 / 26

ALTIM

29.65"

// Interpretation

MVFR — ceiling 1,300 ft. Brisk winds at 350°/13 kt, visibility 6+ SM, scattered at 1,100 ft, broken at 1,300 ft, and broken at 1,700 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 ROYN 251800Z AUTO 35013KT 9999 SCT011 BKN013 BKN017 28/26 Q1004

ROYN · day 25 at 18:00 UTC · wind from 350° at 13 kt · visibility 6+ SM · scattered layer at 1,100 ft · broken layer at 1,300 ft · broken layer at 1,700 ft · temp 28°C / dewpoint 26°C · altimeter 29.65" Hg

// Runway analysis · computed from current METAR wind

Wind 350° @ 13 kt

2 USABLE · 0 AVOID · 2 CAUTION

WIND

350°13 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 2 usable

08★ HDG 080° H0 kt X13 kt LEFT PRIMARY · 4,920'

26 HDG 260° H0 kt X13 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 +14°C

2,000FT

+1,930 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV70 FT OAT+28°C ISA DELTA+14°C PRESSURE ALT342 FT

// Performance equivalent Operating here right now feels like operating at RJAF (Shinshu-Matsumoto Airport, Matsumoto, elev 2,182 ft) on a standard ISA day.

// Aircraft performance impact SIGNIFICANT

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 · 3 reported · highest to lowest

// Reported layers (highest → lowest)

BKN017

Broken · base 1,700 ft AGL · ~5–7 oktas

BKN013

Broken · base 1,300 ft AGL · ~5–7 oktas

SCT011

Scattered · base 1,100 ft AGL · ~3–4 oktas

// Computed

CEILING1,300 ft AGL HIGHEST LAYER1,700 ft TOTAL COVERAGE~91% (overcast) FREEZING LEVEL14,211 ft VFR MARGIN-1,700 ft

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

21:28ZSUNRISE

03:51ZSOLAR NOON

10:14ZSUNSET

10:38ZCIVIL END

CURRENT18:10Z DAYLIGHT REMAINING16h 03m VFR NIGHT BEGINS10:38Z (16h 27m) DAY LENGTH12h 46m

Waxing Gibbous

ILLUMINATION94% MOONRISE07:34Z MOONSET20:21Z FULL MOON IN2 days

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

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