// Station · 1h 1m ago · STALE
RJSN
Niigata Airport
CAT VFR
WIND 150° / 4 kt
VIS 6+ SM
CEILING BKN at 8,000 ft
T/Td 26°C / 23°C
ALTIM 29.91 inHg
WX -RA
ELEV 29 FT
37.9542°N / 139.1122°E
LOCATION · Niigata, JP
WIND
150°4 kt
RJSN · 29 FT
© OSM · CartoDB
// Current + 24h forecast · METAR loaded · TAF loading…
METRIC
NOW · 13Z
+6H
+12H
+18H
WIND
150°/4
VIS
6+ SM
CEILING
BKN080
LAYERS
BKN080 OVC140
T / Td
26 / 23
ALTIM
29.91"
// Interpretation
VFR — ceiling 8,000 ft. Light winds at 150°/4 kt, visibility 6+ SM, broken at 8,000 ft, and overcast at 14,000 ft. Reported weather: -RA. Would shift to MVFR if the ceiling drops to 3,000 ft or visibility below 5 SM.
Loading TAF forecast narrative…
// Want this glance-able on 10 airports? METAR Deck →// Raw observation METAR string + decoded
METAR RJSN 111300Z AUTO 15004KT 9999 -RA BKN080 OVC140 26/23 Q1013
RJSN · day 11 at 13:00 UTC · wind from 150° at 4 kt · visibility 6+ SM · broken layer at 8,000 ft · overcast at 14,000 ft · temp 26°C / dewpoint 23°C · altimeter 29.91" Hg · weather: -RA
// Runway analysis · computed from current METAR wind
Wind 150° @ 4 kt
ALL USABLE · WINDS CALM
WIND
150°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 +11°C
1,400FT
+1,371 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS
↗ +100 FT
24h AGO18h12h6hNOW
FIELD ELEV29 FT
OAT+26°C
ISA DELTA+11°C
PRESSURE ALT35 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
+14%
-10%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+10%
-6%
Light jetCJ4, Phenom 300, M2
+6%
-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 · 2 reported · highest to lowest
// Sun & Moon · times in Z · bar = local day (UTC+9)
19:31ZSUNRISE
02:50ZSOLAR NOON
10:09ZSUNSET
10:39ZCIVIL END
CURRENT14:01Z
DAYLIGHT REMAINING0m
VFR NIGHT BEGINS10:39Z (past)
DAY LENGTH14h 37m
Waning Crescent
ILLUMINATION11%
MOONRISE16:54Z
MOONSET07:32Z
FULL MOON IN18 days
// Nearest reporting stations · 2 shown · 100 NM (sparse area)
// Area map · 100 NM radius · CartoDB Dark Matter + aeronautical overlay
© OpenStreetMap · CartoDB · OpenAIP
//
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