// Station · 18m ago

RJCH

Hakodate Airport

CAT VFR

WIND 010° / 4 kt

VIS 6+ SM

CEILING CLR

T/Td 20°C / 19°C

ALTIM 29.77 inHg

ELEV 151 FT

41.7700°N / 140.8220°E

LOCATION · Hakodate, JP

WIND

010°4 kt

RJCH · 151 FT

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

METRIC

NOW · 16Z

+6H

+12H

+18H

WIND

010°/4

VIS

6+ SM

CEILING

CLR

LAYERS

—

T / Td

20 / 19

ALTIM

29.77"

// Interpretation

VFR with light winds at 010°/4 kt. Visibility 6+ SM and no reported cloud layers. 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 RJCH 251600Z AUTO 01004KT 9999 NCD 20/19 Q1008

RJCH · day 25 at 16:00 UTC · wind from 010° at 4 kt · visibility 6+ SM · temp 20°C / dewpoint 19°C · altimeter 29.77" Hg

// Runway analysis · computed from current METAR wind

Wind 010° @ 4 kt

ALL USABLE · WINDS CALM

WIND

010°4 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

12 HDG 120° —CALM —— 9,842'

30 HDG 300° —CALM —— 9,842'

Pattern altitude: 1,151 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 +6°C

1,000FT

+849 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV151 FT OAT+20°C ISA DELTA+6°C PRESSURE ALT305 FT

// Performance equivalent Operating here right now feels like operating at RJEC (Asahikawa Airport, Higashikagura, elev 721 ft) on a standard ISA day.

// Aircraft performance impact MINOR

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+10%

-7%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+7%

-5%

Light jetCJ4, Phenom 300, M2

+4%

-3%

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 · clear · no layers reported

// Reported layers (highest → lowest)

CLR

No reported cloud layers — clear sky from surface to reporting ceiling.

// Computed

CEILING— HIGHEST LAYER— TOTAL COVERAGEclear FREEZING LEVEL10,252 ft VFR MARGINunlimited

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

19:57ZSUNRISE

02:40ZSOLAR NOON

09:23ZSUNSET

09:52ZCIVIL END

CURRENT16:18Z DAYLIGHT REMAINING17h 04m VFR NIGHT BEGINS09:52Z (17h 33m) DAY LENGTH13h 26m

Waxing Gibbous

ILLUMINATION94% MOONRISE05:59Z MOONSET19:25Z 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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