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// Station · 6h 10m ago · STALE · HARD STALE

RJSY

Shonai Airport
CAT MVFR
WIND 230° / 5 kt
VIS 6+ SM
CEILING BKN at 2,000 ft
T/Td 24°C / 23°C
ALTIM 29.91 inHg
WX -SHRA
ELEV 86 FT
38.8122°N / 139.7870°E
LOCATION · Shonai, JP
N
WIND
230°5 kt
RJSY · 86 FT
© OSM · CartoDB

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

METRIC
NOW · 12Z
+6H
+12H
+18H
WIND
230°/5
 
 
 
VIS
6+ SM
 
 
 
CEILING
BKN020
 
 
 
LAYERS
FEW005 SCT010 BKN020
 
 
 
T / Td
24 / 23
 
 
 
ALTIM
29.91"
 
 
 

// Interpretation

MVFR — ceiling 2,000 ft. Light winds at 230°/5 kt, visibility 6+ SM, a few at 500 ft, scattered at 1,000 ft, and broken at 2,000 ft. Reported weather: -SHRA. 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 RJSY 111200Z 23005KT 9999 -SHRA FEW005 SCT010 BKN020 24/23 Q1013

RJSY · day 11 at 12:00 UTC · wind from 230° at 5 kt · visibility 6+ SM · a few clouds at 500 ft · scattered layer at 1,000 ft · broken layer at 2,000 ft · temp 24°C / dewpoint 23°C · altimeter 29.91" Hg · weather: -SHRA

// Runway analysis · computed from current METAR wind

Wind 230° @ 5 kt
1 USABLE · 1 AVOID
N
WIND
230°5 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
HEADWIND ENDS 1 usable
27 HDG 270° H4 kt X3 kt LEFT PRIMARY · 6,560'
TAILWIND ENDS · AVOID 1 ends
09 HDG 090° T4 kt X3 kt RIGHT
Pattern altitude: 1,086 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

1,200FT
+1,114 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↘ -200 FT
1,800 1,450 1,100
24h AGO18h12h6hNOW
FIELD ELEV86 FT OAT+24°C ISA DELTA+9°C PRESSURE ALT92 FT
// Performance equivalent Operating here right now feels like operating at RJSF (Fukushima Airport, Sukagawa, elev 1,221 ft) on a standard ISA day.
// Aircraft performance impact MINOR
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+12%
-8%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+8%
-5%
Light jetCJ4, Phenom 300, M2
+5%
-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.

// Cloud layers · 3 reported · highest to lowest

FT 0 5k 10k 15k 20k 25k FRZ LVL · 12,207 FT FEW005 SCT010 BKN020 · CEILING RJSY ELEV · 86 FT
// Reported layers (highest → lowest)
BKN020
Broken · base 2,000 ft AGL · ~5–7 oktas
SCT010
Scattered · base 1,000 ft AGL · ~3–4 oktas
FEW005
Few · base 500 ft AGL · ~1–2 oktas
// Computed
CEILING2,000 ft AGL HIGHEST LAYER2,000 ft TOTAL COVERAGE~91% (overcast) FREEZING LEVEL12,207 ft VFR MARGIN-1,000 ft

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

19:26ZSUNRISE
02:47ZSOLAR NOON
10:08ZSUNSET
10:39ZCIVIL END
CURRENT18:10Z DAYLIGHT REMAINING15h 57m VFR NIGHT BEGINS10:39Z (16h 29m) DAY LENGTH14h 41m
Waning Crescent
ILLUMINATION10% MOONRISE16:58Z MOONSET07:40Z FULL MOON IN18 days

// Nearest reporting stations · 3 shown · 100 NM (sparse area)

// Area map · 100 NM radius · CartoDB Dark Matter + aeronautical overlay

© OpenStreetMap · CartoDB · OpenAIP
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