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// Station · 22m ago

RJSN

Niigata Airport
CAT VFR
WIND 160° / 4 kt
VIS 6+ SM
CEILING CLR
T/Td 25°C / 22°C
ALTIM 29.85 inHg
ELEV 29 FT
37.9542°N / 139.1122°E
LOCATION · Niigata, JP
N
WIND
160°4 kt
RJSN · 29 FT
© OSM · CartoDB

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

METRIC
NOW · 17Z
+6H
+12H
+18H
WIND
160°/4
 
 
 
VIS
6+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
 
 
 
T / Td
25 / 22
 
 
 
ALTIM
29.85"
 
 
 

// Interpretation

VFR with light winds at 160°/4 kt. Visibility 6+ SM and no reported cloud layers. 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 111700Z AUTO 16004KT 9999 NSC 25/22 Q1011

RJSN · day 11 at 17:00 UTC · wind from 160° at 4 kt · visibility 6+ SM · temp 25°C / dewpoint 22°C · altimeter 29.85" Hg

// Runway analysis · computed from current METAR wind

Wind 160° @ 4 kt
ALL USABLE · WINDS CALM
N
WIND
160°4 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
ALL RUNWAYS · CALM WINDS 4 ends
10 HDG 100° CALM 8,200'
28 HDG 280° CALM 8,200'
04 HDG 040° CALM 4,300'
22 HDG 220° CALM 4,300'
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 +10°C

1,300FT
+1,271 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↘ -100 FT
1,800 1,450 1,100
24h AGO18h12h6hNOW
FIELD ELEV29 FT OAT+25°C ISA DELTA+10°C PRESSURE ALT94 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
+13%
-9%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+9%
-6%
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 · clear · no layers reported

FT 0 5k 10k 15k 20k 25k FRZ LVL · 12,655 FT RJSN ELEV · 29 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING HIGHEST LAYER TOTAL COVERAGEclear FREEZING LEVEL12,655 ft VFR MARGINunlimited

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

19:31ZSUNRISE
02:50ZSOLAR NOON
10:08ZSUNSET
10:39ZCIVIL END
CURRENT17:22Z DAYLIGHT REMAINING16h 45m VFR NIGHT BEGINS10:39Z (17h 16m) DAY LENGTH14h 36m
Waning Crescent
ILLUMINATION10% MOONRISE17:02Z MOONSET07:38Z FULL MOON IN18 days

// Nearest reporting stations · 2 shown · 100 NM (sparse area)

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

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