// Station · 23m ago

RKSO

Osan Air Base

CAT IFR

WIND 070° / 3 kt

VIS 2.8 SM

CEILING BKN at 900 ft

T/Td 26.9°C / 26.5°C

ALTIM 29.79 inHg

WX BR

ELEV 38 FT

37.0915°N / 127.0294°E

LOCATION · Pyeongtaek, KR

WIND

070°3 kt

RKSO · 38 FT

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

METRIC

NOW · 23Z

+6H

+12H

+18H

WIND

070°/3

VIS

2.8 SM

CEILING

BKN009

LAYERS

SCT002 BKN009

T / Td

27 / 27

ALTIM

29.79"

// Interpretation

IFR conditions — ceiling 900 ft. Light winds at 070°/3 kt, visibility 2.8 SM, scattered at 200 ft, and broken at 900 ft. Reported weather: mist (BR). Mist is water droplets thinning visibility to between 5/8 and 6 SM — the moist, lighter cousin of fog. Would deteriorate to LIFR below 500 ft ceiling or 1 SM, or improve to MVFR above 1,000 ft and 3 SM.

Loading TAF forecast narrative…

SOURCES · NOAA Aviation Weather Center METAR (TAF loading…)

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// Raw observation METAR string + decoded

METAR RKSO 252355Z 07003KT 2 3/4SM BR SCT002 BKN009 27/27 A2979 RMK AO2A CIG 006V009 SLP091 70023 T02690265 10270 20238 55003 FZRANO $

RKSO · day 25 at 23:55 UTC · wind from 070° at 3 kt · visibility 2.8 SM · scattered layer at 200 ft · broken layer at 900 ft · temp 27°C / dewpoint 27°C · altimeter 29.79" Hg · weather: mist (BR) · sea-level pressure 1009.1 mb

// Runway analysis · computed from current METAR wind

Wind 070° @ 3 kt

ALL USABLE · WINDS CALM

WIND

070°3 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 4 ends

09L HDG 090° —CALM —— 9,004'

27R HDG 270° —CALM —— 9,004'

09R HDG 090° —CALM —— 9,004'

27L HDG 270° —CALM —— 9,004'

Pattern altitude: 1,038 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 +12°C

1,600FT

+1,562 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV38 FT OAT+27°C ISA DELTA+12°C PRESSURE ALT165 FT

// Performance equivalent Operating here right now feels like operating at RKSC (Surisan Helipad, Gunpo, elev 1,424 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+16%

-11%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+11%

-7%

Light jetCJ4, Phenom 300, M2

+6%

-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)

BKN009

Broken · base 900 ft AGL · ~5–7 oktas

SCT002

Scattered · base 200 ft AGL · ~3–4 oktas

// Computed

CEILING900 ft AGL HIGHEST LAYER900 ft TOTAL COVERAGE~83% (mostly covered) FREEZING LEVEL13,624 ft VFR MARGIN-2,100 ft

// Sun & Moon · times in Z · bar = local day (UTC+8)

20:58ZSUNRISE

03:35ZSOLAR NOON

10:12ZSUNSET

10:39ZCIVIL END

CURRENT00:18Z DAYLIGHT REMAINING9h 53m VFR NIGHT BEGINS10:39Z (10h 20m) DAY LENGTH13h 13m

Waxing Gibbous

ILLUMINATION95% MOONRISE07:17Z MOONSET20:30Z FULL MOON IN2 days

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// Area map · 60 NM radius · CartoDB Dark Matter + aeronautical overlay

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