// Station · 23m ago

RJSN

Niigata Airport

CAT VFR

WIND 160° / 6 kt

VIS 6+ SM

CEILING OVC at 15,000 ft

T/Td 26°C / 23°C

ALTIM 29.88 inHg

WX -RA

ELEV 29 FT

37.9542°N / 139.1122°E

LOCATION · Niigata, JP

WIND

160°6 kt

RJSN · 29 FT

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

METRIC

NOW · 14Z

+6H

+12H

+18H

WIND

160°/6

VIS

6+ SM

CEILING

OVC150

LAYERS

FEW080 OVC150

T / Td

26 / 23

ALTIM

29.88"

// Interpretation

VFR — ceiling 15,000 ft. Light winds at 160°/6 kt, visibility 6+ SM, a few at 8,000 ft, and overcast at 15,000 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…

SOURCES · NOAA Aviation Weather Center METAR (TAF loading…)

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// Raw observation METAR string + decoded

METAR RJSN 111400Z AUTO 16006KT 9999 -RA FEW080 OVC150 26/23 Q1012

RJSN · day 11 at 14:00 UTC · wind from 160° at 6 kt · visibility 6+ SM · a few clouds at 8,000 ft · overcast at 15,000 ft · temp 26°C / dewpoint 23°C · altimeter 29.88" Hg · weather: -RA

// Runway analysis · computed from current METAR wind

Wind 160° @ 6 kt

2 USABLE · 2 AVOID

WIND

160°6 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 2 usable

22★ HDG 220° H3 kt X5 kt LEFT PRIMARY · 4,300'

10 HDG 100° H3 kt X5 kt RIGHT 8,200'

TAILWIND ENDS · AVOID 2 ends

04 HDG 040° T3 kt X5 kt RIGHT —

28 HDG 280° T3 kt X5 kt LEFT —

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 ALT65 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

// Reported layers (highest → lowest)

OVC150

Overcast · base 15,000 ft AGL · 8 oktas

FEW080

Few · base 8,000 ft AGL · ~1–2 oktas

// Computed

CEILING15,000 ft AGL HIGHEST LAYER15,000 ft TOTAL COVERAGE~100% (overcast) FREEZING LEVEL13,160 ft VFR MARGIN+12,000 ft

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

19:31ZSUNRISE

02:50ZSOLAR NOON

10:09ZSUNSET

10:39ZCIVIL END

CURRENT14:23Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS10:39Z (past) DAY LENGTH14h 37m

Waning Crescent

ILLUMINATION11% MOONRISE16:55Z MOONSET07:33Z FULL MOON IN18 days

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

RJSF

MVFR

Fukushima Airport · Sukagawa

WIND: VRB / 2 kt
VIS: 5.6 SM
CEILING: OVC027
DIST: 76 NM SE
AGE: 23m ago

RJSS

VFR → MVFR 20Z

Sendai Airport · Natori

WIND: 190° / 6 kt
VIS: 6+ SM
CEILING: CLR
DIST: 86 NM E
AGE: 23m ago

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

AIRSPACE

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