// Station · 35m ago

RCNN

Tainan International Airport / Tainan Air Base

CAT MVFR

WIND 030° / 2 kt

VIS 5.0 SM

CEILING Few/scattered only

T/Td 28°C / 23°C

ALTIM 30.03 inHg

ELEV 63 FT

22.9504°N / 120.2060°E

LOCATION · Tainan (Rende), TW

WIND

030°2 kt

RCNN · 63 FT

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

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

030°/2

VIS

5.0 SM

CEILING

—

LAYERS

FEW012 SCT025

T / Td

28 / 23

ALTIM

30.03"

// Interpretation

MVFR — visibility 5.0 SM. Light winds at 030°/2 kt, visibility 5.0 SM, a few at 1,200 ft, and scattered at 2,500 ft. Would drop to IFR below 1,000 ft ceiling or 3 SM visibility, or rise back to VFR above 3,000 ft and 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 130030Z 03002KT 8000 FEW012 SCT025 28/23 Q1017 NOSIG RMK A3003

RCNN · day 13 at 00:30 UTC · wind from 030° at 2 kt · visibility 5.0 SM · a few clouds at 1,200 ft · scattered layer at 2,500 ft · temp 28°C / dewpoint 23°C · altimeter 30.03" Hg

// Runway analysis · computed from current METAR wind

Wind 030° @ 2 kt

ALL USABLE · WINDS CALM

WIND

030°2 kt

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 +13°C

1,500FT

+1,437 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV63 FT OAT+28°C ISA DELTA+13°C PRESSURE ALT-49 FT

// Performance equivalent Your aircraft will perform as if it's at a field 1,500 ft high on a standard ISA day — that's +1,437 ft above RCNN's actual elevation.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+15%

-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)

SCT025

Scattered · base 2,500 ft AGL · ~3–4 oktas

FEW012

Few · base 1,200 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER2,500 ft TOTAL COVERAGE~48% (mixed) FREEZING LEVEL14,204 ft VFR MARGINunlimited

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

21:55ZSUNRISE

03:46ZSOLAR NOON

09:37ZSUNSET

10:00ZCIVIL END

CURRENT01:05Z DAYLIGHT REMAINING8h 31m VFR NIGHT BEGINS10:00Z (8h 54m) DAY LENGTH11h 41m

Waxing Crescent

ILLUMINATION3% MOONRISE23:16Z MOONSET10:58Z FULL MOON IN13 days

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

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