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// Station · 22m ago

RCNN

Tainan International Airport / Tainan Air Base
CAT VFR
WIND 260° / 3 kt
VIS 6+ SM
CEILING Few/scattered only
T/Td 29°C / 26°C
ALTIM 29.80 inHg
ELEV 63 FT
22.9504°N / 120.2060°E
LOCATION · Tainan (Rende), TW
N
WIND
260°3 kt
RCNN · 63 FT
© OSM · CartoDB

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

METRIC
NOW · 11Z
+6H
+12H
+18H
WIND
260°/3
 
 
 
VIS
6+ SM
 
 
 
CEILING
 
 
 
LAYERS
FEW014 SCT120
 
 
 
T / Td
29 / 26
 
 
 
ALTIM
29.80"
 
 
 

// Interpretation

VFR with light winds at 260°/3 kt. Visibility 6+ SM and a few at 1,400 ft, and scattered at 12,000 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 271130Z 26003KT 9999 FEW014 SCT120 29/26 Q1009 NOSIG RMK A2981

RCNN · day 27 at 11:30 UTC · wind from 260° at 3 kt · visibility 6+ SM · a few clouds at 1,400 ft · scattered layer at 12,000 ft · temp 29°C / dewpoint 26°C · altimeter 29.80" Hg

// Runway analysis · computed from current METAR wind

Wind 260° @ 3 kt
ALL USABLE · WINDS CALM
N
WIND
260°3 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 +14°C

1,900FT
+1,837 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↗ +100 FT
2,600 2,000 1,400
24h AGO18h12h6hNOW
FIELD ELEV63 FT OAT+29°C ISA DELTA+14°C PRESSURE ALT187 FT
// Performance equivalent Your aircraft will perform as if it's at a field 1,900 ft high on a standard ISA day — that's +1,837 ft above RCNN's actual elevation.
// Aircraft performance impact MINOR
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+19%
-13%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+13%
-9%
Light jetCJ4, Phenom 300, M2
+8%
-6%

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.

// Cloud layers · 2 reported · highest to lowest

FT 0 5k 10k 15k 20k 25k FRZ LVL · 14,709 FT FEW014 SCT120 RCNN ELEV · 63 FT
// Reported layers (highest → lowest)
SCT120
Scattered · base 12,000 ft AGL · ~3–4 oktas
FEW014
Few · base 1,400 ft AGL · ~1–2 oktas
// Computed
CEILING HIGHEST LAYER12,000 ft TOTAL COVERAGE~48% (mixed) FREEZING LEVEL14,709 ft VFR MARGINunlimited

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

21:15ZSUNRISE
03:57ZSOLAR NOON
10:39ZSUNSET
11:04ZCIVIL END
CURRENT11:52Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS11:04Z (past) DAY LENGTH13h 23m
Waxing Gibbous
ILLUMINATION83% MOONRISE06:00Z MOONSET19:24Z FULL MOON IN4 days

// Nearest reporting stations · 3 shown · 60 NM radius

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

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