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// Station · 53m ago

RJSN

Niigata Airport
CAT VFR
WIND 020° / 6 kt
VIS 6+ SM
CEILING Few/scattered only
T/Td 21°C / 17°C
ALTIM 29.71 inHg
ELEV 29 FT
37.9542°N / 139.1122°E
LOCATION · Niigata, JP
N
WIND
020°6 kt
RJSN · 29 FT
© OSM · CartoDB

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

METRIC
NOW · 10Z
+6H
+12H
+18H
WIND
020°/6
 
 
 
VIS
6+ SM
 
 
 
CEILING
 
 
 
LAYERS
FEW030 SCT150
 
 
 
T / Td
21 / 17
 
 
 
ALTIM
29.71"
 
 
 

// Interpretation

VFR with light winds at 020°/6 kt. Visibility 6+ SM and a few at 3,000 ft, and scattered at 15,000 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 RJSN 271000Z 02006KT 360V080 9999 FEW030 SCT150 BKN/// 21/17 Q1006

RJSN · day 27 at 10:00 UTC · wind from 020° at 6 kt · visibility 6+ SM · a few clouds at 3,000 ft · scattered layer at 15,000 ft · temp 21°C / dewpoint 17°C · altimeter 29.71" Hg

// Runway analysis · computed from current METAR wind

Wind 020° @ 6 kt
2 USABLE · 2 AVOID · 1 CAUTION
N
WIND
020°6 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
HEADWIND ENDS 2 usable
04 HDG 040° H6 kt X2 kt LEFT PRIMARY · 4,300'
10 HDG 100° H1 kt X6 kt LEFT ⚠ HIGH XW · 100%
TAILWIND ENDS · AVOID 2 ends
28 HDG 280° T1 kt X6 kt RIGHT
22 HDG 220° T6 kt X2 kt RIGHT
Pattern altitude: 1,029 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 +6°C

1,000FT
+971 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↗ +200 FT
1,700 1,100 500
24h AGO18h12h6hNOW
FIELD ELEV29 FT OAT+21°C ISA DELTA+6°C PRESSURE ALT242 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
+10%
-7%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+7%
-5%
Light jetCJ4, Phenom 300, M2
+4%
-3%

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 · 10,635 FT FEW030 SCT150 RJSN ELEV · 29 FT
// Reported layers (highest → lowest)
SCT150
Scattered · base 15,000 ft AGL · ~3–4 oktas
FEW030
Few · base 3,000 ft AGL · ~1–2 oktas
// Computed
CEILING HIGHEST LAYER15,000 ft TOTAL COVERAGE~48% (mixed) FREEZING LEVEL10,635 ft VFR MARGINunlimited

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

19:26ZSUNRISE
02:42ZSOLAR NOON
09:57ZSUNSET
10:27ZCIVIL END
CURRENT10:53Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS10:27Z (past) DAY LENGTH14h 30m
Waxing Gibbous
ILLUMINATION83% MOONRISE04:09Z MOONSET18:40Z FULL MOON IN4 days

// Nearest reporting stations · 4 shown · 100 NM (sparse area)

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

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