// Station · 18m ago

ROYN

Yonaguni Airport

CAT MVFR

WIND 190° / 28 kt G41

VIS 5.0 SM

CEILING BKN at 1,900 ft

T/Td 30°C / 27°C

ALTIM 29.38 inHg

ELEV 70 FT

24.4673°N / 122.9798°E

LOCATION · Yonaguni, JP

WIND

190°28 kt

ROYN · 70 FT

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

METRIC

NOW · 17Z

+6H

+12H

+18H

WIND

190°/28G41

VIS

5.0 SM

CEILING

BKN019

LAYERS

BKN019 OVC029

T / Td

30 / 27

ALTIM

29.38"

// Interpretation

MVFR — ceiling 1,900 ft. Strong winds at 190°/28 kt, gusting 41, visibility 5.0 SM, broken at 1,900 ft, and overcast at 2,900 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 111700Z AUTO 19028G41KT 8000 BKN019 OVC029 30/27 Q0995

ROYN · day 11 at 17:00 UTC · wind from 190° at 28 kt, gusts to 41 kt · visibility 5.0 SM · broken layer at 1,900 ft · overcast at 2,900 ft · temp 30°C / dewpoint 27°C · altimeter 29.38" Hg

// Runway analysis · computed from current METAR wind

Wind 190° @ 28 ktG41

1 USABLE · 1 AVOID · 1 CAUTION

WIND

190°28G41 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

26★ HDG 260° H10 kt X26 kt LEFT PRIMARY · 4,920'

TAILWIND ENDS · AVOID 1 ends

08 HDG 080° T10 kt X26 kt RIGHT —

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 +16°C

2,600FT

+2,530 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↘ -100 FT

24h AGO18h12h6hNOW

FIELD ELEV70 FT OAT+30°C ISA DELTA+16°C PRESSURE ALT608 FT

// Performance equivalent Operating here right now feels like operating at RJAT (JGSDF Camp Fuji Heliport / Fuji Army Heliport, Gotenba, elev 2,271 ft) on a standard ISA day.

// Aircraft performance impact MINOR

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+26%

-18%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+18%

-12%

Light jetCJ4, Phenom 300, M2

+10%

-8%

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 · 2 reported · highest to lowest

// Reported layers (highest → lowest)

OVC029

Overcast · base 2,900 ft AGL · 8 oktas

BKN019

Broken · base 1,900 ft AGL · ~5–7 oktas

// Computed

CEILING1,900 ft AGL HIGHEST LAYER2,900 ft TOTAL COVERAGE~100% (overcast) FREEZING LEVEL15,222 ft VFR MARGIN-1,100 ft

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

21:08ZSUNRISE

03:54ZSOLAR NOON

10:41ZSUNSET

11:06ZCIVIL END

CURRENT17:18Z DAYLIGHT REMAINING17h 22m VFR NIGHT BEGINS11:06Z (17h 47m) DAY LENGTH13h 32m

Waning Crescent

ILLUMINATION10% MOONRISE18:38Z MOONSET08:11Z FULL MOON IN18 days

// Nearest reporting stations · 3 shown · 100 NM (sparse area)

ROIG

MVFR

New Ishigaki Airport · Ishigaki

WIND: 180° / 20 kt
VIS: 3.7 SM
CEILING: BKN013
DIST: 69 NM E
AGE: 18m ago

RCSS

VFR

Taipei Songshan International Airport · Taipei (Songshan)

WIND: 220° / 4 kt
VIS: 6+ SM
CEILING: BKN120
DIST: 86 NM NW
AGE: 18m ago

RORT

MVFR

Tarama Airport · Tarama

WIND: 170° / 23 ktG37
VIS: —
CEILING: BKN017
DIST: 93 NM E
AGE: 18m ago

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

AIRSPACE

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