// Station · 8h 21m ago · STALE · HARD STALE

RJSY

Shonai Airport

CAT MVFR

WIND 250° / 12 kt

VIS 6+ SM

CEILING BKN at 1,500 ft

T/Td 28°C / 26°C

ALTIM 29.80 inHg

ELEV 86 FT

38.8122°N / 139.7870°E

LOCATION · Shonai, JP

WIND

250°12 kt

RJSY · 86 FT

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

METRIC

NOW · 12Z

+6H

+12H

+18H

WIND

250°/12

VIS

6+ SM

CEILING

BKN015

LAYERS

FEW009 BKN015

T / Td

28 / 26

ALTIM

29.80"

// Interpretation

MVFR — ceiling 1,500 ft. Moderate winds at 250°/12 kt, visibility 6+ SM, a few at 900 ft, and broken at 1,500 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 RJSY 251200Z 25012KT 9999 FEW009 BKN015 28/26 Q1009

RJSY · day 25 at 12:00 UTC · wind from 250° at 12 kt · visibility 6+ SM · a few clouds at 900 ft · broken layer at 1,500 ft · temp 28°C / dewpoint 26°C · altimeter 29.80" Hg

// Runway analysis · computed from current METAR wind

Wind 250° @ 12 kt

1 USABLE · 1 AVOID

WIND

250°12 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

27★ HDG 270° H11 kt X4 kt LEFT PRIMARY · 6,560'

TAILWIND ENDS · AVOID 1 ends

09 HDG 090° T11 kt X4 kt RIGHT —

Pattern altitude: 1,086 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 +13°C

1,800FT

+1,714 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV86 FT OAT+28°C ISA DELTA+13°C PRESSURE ALT210 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 MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+18%

-13%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+13%

-8%

Light jetCJ4, Phenom 300, M2

+7%

-5%

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)

BKN015

Broken · base 1,500 ft AGL · ~5–7 oktas

FEW009

Few · base 900 ft AGL · ~1–2 oktas

// Computed

CEILING1,500 ft AGL HIGHEST LAYER1,500 ft TOTAL COVERAGE~83% (mostly covered) FREEZING LEVEL14,227 ft VFR MARGIN-1,500 ft

// Sun & Moon · times in Z · bar = local day (UTC+9)

20:05ZSUNRISE

02:44ZSOLAR NOON

09:23ZSUNSET

09:51ZCIVIL END

CURRENT20:21Z DAYLIGHT REMAINING13h 01m VFR NIGHT BEGINS09:51Z (13h 29m) DAY LENGTH13h 18m

Waxing Gibbous

ILLUMINATION94% MOONRISE06:16Z MOONSET19:34Z 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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