// Station · 17m ago

CYDC

Princeton Airport

CAT VFR

WIND 010° / 8 kt

VIS 10+ SM

CEILING BKN at 25,000 ft

T/Td 20°C / 7°C

ALTIM 29.91 inHg

ELEV 2,298 FT

49.4681°N / 120.5110°W

LOCATION · Town of Princeton, CA

WIND

010°8 kt

CYDC · 2,298 FT

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

METRIC

NOW · 01Z

+6H

+12H

+18H

WIND

010°/8

VIS

10+ SM

CEILING

BKN250

LAYERS

FEW068 SCT069 SCT079 BKN250

T / Td

20 / 7

ALTIM

29.91"

// Interpretation

VFR — ceiling 25,000 ft. Moderate winds at 010°/8 kt, visibility better than 10 statute miles, a few at 6,800 ft, scattered at 6,900 ft, scattered at 7,900 ft, and broken at 25,000 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 CYDC 290100Z 01008KT 260V020 10SM FEW068 SCT069 SCT079 BKN250 BKN270 20/07 A2991 RMK CU1AC2AC1CS2CI1 FU SW/LAST STFD OBS/NEXT 29 1300Z SLP125 DENSITY ALT 3500FT

CYDC · day 29 at 01:00 UTC · wind from 010° at 8 kt · visibility 10+ SM · a few clouds at 6,800 ft · scattered layer at 6,900 ft · scattered layer at 7,900 ft · broken layer at 25,000 ft · temp 20°C / dewpoint 7°C · altimeter 29.91" Hg · sea-level pressure 1012.5 mb

// Runway analysis · computed from current METAR wind

Wind 010° @ 8 kt

1 USABLE · 1 AVOID

WIND

010°8 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

04★ HDG 040° H7 kt X4 kt LEFT PRIMARY · 3,932'

TAILWIND ENDS · AVOID 1 ends

22 HDG 220° T7 kt X4 kt RIGHT —

Pattern altitude: 3,298 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

3,500FT

+1,202 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↗ +1,400 FT

24h AGO18h12h6hNOW

FIELD ELEV2,298 FT OAT+20°C ISA DELTA+10°C PRESSURE ALT2,304 FT

// Performance equivalent Operating here right now feels like operating at CAJ4 (Anahim Lake Airport, Anahim Lake, elev 3,635 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+35%

-25%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+25%

-16%

Light jetCJ4, Phenom 300, M2

+14%

-11%

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 · 4 reported · highest to lowest

// Reported layers (highest → lowest)

BKN250

Broken · base 25,000 ft AGL · ~5–7 oktas

SCT079

Scattered · base 7,900 ft AGL · ~3–4 oktas

SCT069

Scattered · base 6,900 ft AGL · ~3–4 oktas

FEW068

Few · base 6,800 ft AGL · ~1–2 oktas

// Computed

CEILING25,000 ft AGL HIGHEST LAYER25,000 ft TOTAL COVERAGE~99% (overcast) FREEZING LEVEL12,399 ft VFR MARGIN+22,000 ft

// Sun & Moon · times in Z · bar = local day (UTC-8)

13:13ZSUNRISE

20:04ZSOLAR NOON

02:55ZSUNSET

03:29ZCIVIL END

CURRENT01:17Z DAYLIGHT REMAINING1h 38m VFR NIGHT BEGINS03:29Z (2h 12m) DAY LENGTH13h 42m

Waning Gibbous

ILLUMINATION99% MOONRISE02:00Z MOONSET15:43Z FULL MOON IN29 days

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

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