// Station · 25m ago

CYAH

La Grande-4 Airport

CAT VFR

WIND 280° / 10 kt G17

VIS 9.0 SM

CEILING BKN at 4,800 ft

T/Td 22°C / 11°C

ALTIM 29.85 inHg

ELEV 1,005 FT

53.7547°N / 73.6753°W

LOCATION · La Grande-4, CA

WIND

280°10 kt

CYAH · 1,005 FT

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

METRIC

NOW · 20Z

+6H

+12H

+18H

WIND

280°/10G17

VIS

9.0 SM

CEILING

BKN048

LAYERS

BKN048 BKN096

T / Td

22 / 11

ALTIM

29.85"

// Interpretation

VFR — ceiling 4,800 ft. Moderate winds at 280°/10 kt, gusting 17, visibility 9.0 SM, broken at 4,800 ft, and broken at 9,600 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 CYAH 252000Z AUTO 28010G17KT 9SM BKN048 BKN096 22/11 A2985 RMK SLP115 DENSITY ALT 2100FT

CYAH · day 25 at 20:00 UTC · wind from 280° at 10 kt, gusts to 17 kt · visibility 9.0 SM · broken layer at 4,800 ft · broken layer at 9,600 ft · temp 22°C / dewpoint 11°C · altimeter 29.85" Hg · sea-level pressure 1011.5 mb

// Runway analysis · computed from current METAR wind

Wind 280° @ 10 ktG17

1 USABLE · 1 AVOID

WIND

280°10G17 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

27★ HDG 270° H10 kt X2 kt RIGHT PRIMARY · 5,000'

TAILWIND ENDS · AVOID 1 ends

09 HDG 090° T10 kt X2 kt LEFT —

Pattern altitude: 2,005 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

2,200FT

+1,195 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV1,005 FT OAT+22°C ISA DELTA+9°C PRESSURE ALT1,073 FT

// Performance equivalent Operating here right now feels like operating at CYKL (Schefferville Airport, Schefferville, elev 1,709 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+22%

-15%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+15%

-10%

Light jetCJ4, Phenom 300, M2

+9%

-7%

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. Severity rating assumes a standard altimeter setting (29.92" Hg / 1013 hPa); a non-standard setting shifts the effective altitude by roughly 1,000 ft per 1" Hg of deviation.

// Cloud layers · 2 reported · highest to lowest

// Reported layers (highest → lowest)

BKN096

Broken · base 9,600 ft AGL · ~5–7 oktas

BKN048

Broken · base 4,800 ft AGL · ~5–7 oktas

// Computed

CEILING4,800 ft AGL HIGHEST LAYER9,600 ft TOTAL COVERAGE~83% (mostly covered) FREEZING LEVEL12,116 ft VFR MARGIN+1,800 ft

// Sun & Moon · times in Z · bar = local day (UTC-5)

09:52ZSUNRISE

16:58ZSOLAR NOON

00:04ZSUNSET

00:42ZCIVIL END

CURRENT20:25Z DAYLIGHT REMAINING3h 39m VFR NIGHT BEGINS00:42Z (4h 17m) DAY LENGTH14h 11m

Waxing Gibbous

ILLUMINATION94% MOONRISE20:03Z MOONSET10:15Z FULL MOON IN2 days

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// Area map · 60 NM radius · CartoDB Dark Matter + aeronautical overlay

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