// Station · 1h 3m ago · STALE

RJSY

Shonai Airport

CAT VFR

WIND 100° / 12 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 22°C / 15°C

ALTIM 30.00 inHg

ELEV 86 FT

38.8122°N / 139.7870°E

LOCATION · Shonai, JP

WIND

100°12 kt

RJSY · 86 FT

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

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

100°/12

VIS

6+ SM

CEILING

—

LAYERS

FEW020

T / Td

22 / 15

ALTIM

30.00"

// Interpretation

VFR with moderate winds at 100°/12 kt. Visibility 6+ SM and a few at 2,000 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 RJSY 130000Z 10012KT 9999 FEW020 22/15 Q1016

RJSY · day 13 at 00:00 UTC · wind from 100° at 12 kt · visibility 6+ SM · a few clouds at 2,000 ft · temp 22°C / dewpoint 15°C · altimeter 30.00" Hg

// Runway analysis · computed from current METAR wind

Wind 100° @ 12 kt

1 USABLE · 1 AVOID

WIND

100°12 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

09★ HDG 090° H12 kt X2 kt RIGHT PRIMARY · 6,560'

TAILWIND ENDS · AVOID 1 ends

27 HDG 270° T12 kt X2 kt LEFT —

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 +7°C

800FT

+714 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV86 FT OAT+22°C ISA DELTA+7°C PRESSURE ALT4 FT

// Performance equivalent Operating here right now feels like operating at RJSC (Yamagata Airport, Higashine, elev 353 ft) on a standard ISA day.

// Aircraft performance impact MINOR

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+8%

-6%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+6%

-4%

Light jetCJ4, Phenom 300, M2

+3%

-2%

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)

FEW020

Few · base 2,000 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER2,000 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL11,197 ft VFR MARGINunlimited

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

20:48ZSUNRISE

02:28ZSOLAR NOON

08:08ZSUNSET

08:34ZCIVIL END

CURRENT01:03Z DAYLIGHT REMAINING7h 04m VFR NIGHT BEGINS08:34Z (7h 31m) DAY LENGTH11h 19m

Waxing Crescent

ILLUMINATION3% MOONRISE22:09Z MOONSET09:29Z 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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