// Station · 10h 14m ago · STALE · HARD STALE

RJTF

Chofu Airport

CAT VFR

WIND 160° / 8 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 33°C / 25°C

ALTIM 29.77 inHg

ELEV 141 FT

35.6717°N / 139.5280°E

LOCATION · Chofu, JP

WIND

160°8 kt

RJTF · 141 FT

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

METRIC

NOW · 08Z

+6H

+12H

+18H

WIND

160°/8

VIS

6+ SM

CEILING

—

LAYERS

FEW030

T / Td

33 / 25

ALTIM

29.77"

// Interpretation

VFR with moderate winds at 160°/8 kt. Visibility 6+ SM and a few at 3,000 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 RJTF 250800Z 16008KT 130V200 9999 FEW030 33/25 Q1008

RJTF · day 25 at 08:00 UTC · wind from 160° at 8 kt · visibility 6+ SM · a few clouds at 3,000 ft · temp 33°C / dewpoint 25°C · altimeter 29.77" Hg

// Runway analysis · computed from current METAR wind

Wind 160° @ 8 kt

1 USABLE · 1 AVOID

WIND

160°8 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

17★ HDG 170° H8 kt X1 kt LEFT PRIMARY · 2,625'

TAILWIND ENDS · AVOID 1 ends

35 HDG 350° T8 kt X1 kt RIGHT —

Pattern altitude: 1,141 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 +19°C

2,500FT

+2,359 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV141 FT OAT+33°C ISA DELTA+19°C PRESSURE ALT295 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 SIGNIFICANT

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+25%

-18%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+18%

-11%

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. 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)

FEW030

Few · base 3,000 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER3,000 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL16,808 ft VFR MARGINunlimited

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

20:10ZSUNRISE

02:45ZSOLAR NOON

09:20ZSUNSET

09:46ZCIVIL END

CURRENT18:14Z DAYLIGHT REMAINING15h 06m VFR NIGHT BEGINS09:46Z (15h 32m) DAY LENGTH13h 10m

Waxing Gibbous

ILLUMINATION94% MOONRISE06:16Z MOONSET19:26Z 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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