// Station · 1h 7m ago · STALE

CYWL

Williams Lake Airport

CAT VFR

WIND 040° / 5 kt

VIS 10+ SM

CEILING BKN at 20,000 ft

T/Td 26°C / 10°C

ALTIM 30.04 inHg

ELEV 3,085 FT

52.1831°N / 122.0540°W

LOCATION · Williams Lake, CA

WIND

040°5 kt

CYWL · 3,085 FT

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

METRIC

NOW · 22Z

+6H

+12H

+18H

WIND

040°/5

VIS

10+ SM

CEILING

BKN200

LAYERS

FEW060 BKN200

T / Td

26 / 10

ALTIM

30.04"

// Interpretation

VFR — ceiling 20,000 ft. Light winds at 040°/5 kt, visibility better than 10 statute miles, a few at 6,000 ft, and broken at 20,000 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 CYWL 182200Z 04005KT 340V060 15SM FEW060 BKN200 26/10 A3004 RMK CF1CI7 SLP164 DENSITY ALT 4900FT

CYWL · day 18 at 22:00 UTC · wind from 040° at 5 kt · visibility 10+ SM · a few clouds at 6,000 ft · broken layer at 20,000 ft · temp 26°C / dewpoint 10°C · altimeter 30.04" Hg · sea-level pressure 1016.4 mb

// Runway analysis · computed from current METAR wind

Wind 040° @ 5 kt

1 USABLE · 1 AVOID

WIND

040°5 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

12★ HDG 120° H1 kt X5 kt LEFT PRIMARY · 7,000'

TAILWIND ENDS · AVOID 1 ends

30 HDG 300° T1 kt X5 kt RIGHT —

Pattern altitude: 4,085 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 +17°C

5,000FT

+1,915 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV3,085 FT OAT+26°C ISA DELTA+17°C PRESSURE ALT2,961 FT

// Performance equivalent Your aircraft will perform as if it's at a field 5,000 ft high on a standard ISA day — that's +1,915 ft above CYWL's actual elevation.

// Aircraft performance impact SIGNIFICANT

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+50%

-35%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+35%

-23%

Light jetCJ4, Phenom 300, M2

+20%

-15%

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)

BKN200

Broken · base 20,000 ft AGL · ~5–7 oktas

FEW060

Few · base 6,000 ft AGL · ~1–2 oktas

// Computed

CEILING20,000 ft AGL HIGHEST LAYER20,000 ft TOTAL COVERAGE~83% (mostly covered) FREEZING LEVEL16,216 ft VFR MARGIN+17,000 ft

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

12:58ZSUNRISE

20:13ZSOLAR NOON

03:28ZSUNSET

04:06ZCIVIL END

CURRENT23:07Z DAYLIGHT REMAINING4h 21m VFR NIGHT BEGINS04:06Z (4h 59m) DAY LENGTH14h 30m

Waxing Crescent

ILLUMINATION32% MOONRISE17:33Z MOONSET08:03Z FULL MOON IN9 days

// Nearest reporting stations

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

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