// Station · 1h 2m ago · STALE

RCNN

Tainan International Airport / Tainan Air Base

CAT VFR

WIND CALM

VIS 6+ SM

CEILING BKN at 6,000 ft

T/Td 24°C / 23°C

ALTIM 29.74 inHg

ELEV 63 FT

22.9504°N / 120.2060°E

LOCATION · Tainan (Rende), TW

WIND

000°0 kt

RCNN · 63 FT

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

METRIC

NOW · 16Z

+6H

+12H

+18H

WIND

CALM

VIS

6+ SM

CEILING

BKN060

LAYERS

FEW010 SCT030 BKN060

T / Td

24 / 23

ALTIM

29.74"

// Interpretation

VFR — ceiling 6,000 ft. Winds calm, visibility 6+ SM, a few at 1,000 ft, scattered at 3,000 ft, and broken at 6,000 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 RCNN 251600Z 00000KT 9999 FEW010 SCT030 BKN060 24/23 Q1007 RMK A2974

RCNN · day 25 at 16:00 UTC · winds calm · visibility 6+ SM · a few clouds at 1,000 ft · scattered layer at 3,000 ft · broken layer at 6,000 ft · temp 24°C / dewpoint 23°C · altimeter 29.74" Hg

// Runway analysis · computed from current METAR wind

Wind CALM

ALL USABLE · WINDS CALM

WIND

000°calm

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 4 ends

18L HDG 180° —CALM —— 10,007'

36R HDG 360° —CALM —— 10,007'

18R HDG 180° —CALM —— 10,007'

36L HDG 360° —CALM —— 10,007'

Pattern altitude: 1,063 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 +9°C

1,400FT

+1,337 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV63 FT OAT+24°C ISA DELTA+9°C PRESSURE ALT246 FT

// Performance equivalent Your aircraft will perform as if it's at a field 1,400 ft high on a standard ISA day — that's +1,337 ft above RCNN's actual elevation.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+14%

-10%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+10%

-6%

Light jetCJ4, Phenom 300, M2

+6%

-4%

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 · 3 reported · highest to lowest

// Reported layers (highest → lowest)

BKN060

Broken · base 6,000 ft AGL · ~5–7 oktas

SCT030

Scattered · base 3,000 ft AGL · ~3–4 oktas

FEW010

Few · base 1,000 ft AGL · ~1–2 oktas

// Computed

CEILING6,000 ft AGL HIGHEST LAYER6,000 ft TOTAL COVERAGE~91% (overcast) FREEZING LEVEL12,184 ft VFR MARGIN+3,000 ft

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

21:40ZSUNRISE

04:02ZSOLAR NOON

10:24ZSUNSET

10:47ZCIVIL END

CURRENT17:02Z DAYLIGHT REMAINING17h 22m VFR NIGHT BEGINS10:47Z (17h 45m) DAY LENGTH12h 43m

Waxing Gibbous

ILLUMINATION94% MOONRISE07:44Z MOONSET20:28Z FULL MOON IN2 days

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

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