// Station · 8m ago

RJCO

Sapporo Okadama Airport

CAT VFR

WIND 140° / 17 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 19°C / 15°C

ALTIM 30.03 inHg

ELEV 25 FT

43.1174°N / 141.3813°E

LOCATION · Sapporo, JP

WIND

140°17 kt

RJCO · 25 FT

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

METRIC

NOW · 01Z

+6H

+12H

+18H

WIND

140°/17

VIS

6+ SM

CEILING

—

LAYERS

FEW020

T / Td

19 / 15

ALTIM

30.03"

// Interpretation

VFR with brisk winds at 140°/17 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 RJCO 130100Z 14017KT 9999 FEW020 19/15 Q1017

RJCO · day 13 at 01:00 UTC · wind from 140° at 17 kt · visibility 6+ SM · a few clouds at 2,000 ft · temp 19°C / dewpoint 15°C · altimeter 30.03" Hg

// Runway analysis · computed from current METAR wind

Wind 140° @ 17 kt

1 USABLE · 1 AVOID

WIND

140°17 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

14★ HDG 140° H17 kt X0 kt — PRIMARY · 4,920'

TAILWIND ENDS · AVOID 1 ends

32 HDG 320° T17 kt X0 kt — —

Pattern altitude: 1,025 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 +4°C

400FT

+375 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV25 FT OAT+19°C ISA DELTA+4°C PRESSURE ALT-87 FT

// Performance equivalent Operating here right now feels like operating at RJCA (JGSDF Camp Asahikawa Airfield, Asahikawa, elev 377 ft) on a standard ISA day.

// Aircraft performance impact MINOR

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+4%

-3%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+3%

-2%

Light jetCJ4, Phenom 300, M2

+2%

-1%

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 LEVEL9,621 ft VFR MARGINunlimited

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

20:45ZSUNRISE

02:22ZSOLAR NOON

07:58ZSUNSET

08:26ZCIVIL END

CURRENT01:08Z DAYLIGHT REMAINING6h 49m VFR NIGHT BEGINS08:26Z (7h 17m) DAY LENGTH11h 12m

Waxing Crescent

ILLUMINATION3% MOONRISE22:07Z MOONSET09:19Z 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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