// Station · 21m ago

KHAF

Half Moon Bay Airport

CAT VFR

WIND 340° / 10 kt

VIS 6.0 SM

CEILING Few/scattered only

T/Td 16°C / 15°C

ALTIM 30.00 inHg

WX BR

ELEV 66 FT

37.5134°N / 122.5010°W

LOCATION · Half Moon Bay, US

WIND

340°10 kt

KHAF · 66 FT

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

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

340°/10

VIS

6.0 SM

CEILING

—

LAYERS

FEW009 FEW013

T / Td

16 / 15

ALTIM

30.00"

// Interpretation

VFR with moderate winds at 340°/10 kt. Visibility 6.0 SM and a few at 900 ft, and a few at 1,300 ft. Reported weather: mist (BR). Mist is water droplets thinning visibility to between 5/8 and 6 SM — the moist, lighter cousin of fog. 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 KHAF 290055Z AUTO 34010KT 6SM BR FEW009 FEW013 16/15 A3000 RMK AO2

KHAF · day 29 at 00:55 UTC · wind from 340° at 10 kt · visibility 6.0 SM · a few clouds at 900 ft · a few clouds at 1,300 ft · temp 16°C / dewpoint 15°C · altimeter 30.00" Hg · weather: mist (BR) · automated station w/ precipitation discriminator

// Runway analysis · computed from current METAR wind

Wind 340° @ 10 kt

1 USABLE · 1 AVOID · 1 CAUTION

WIND

340°10 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

30★ HDG 300° H8 kt X6 kt RIGHT PRIMARY · 5,000'

TAILWIND ENDS · AVOID 1 ends

12 HDG 120° T8 kt X6 kt LEFT —

Pattern altitude: 1,066 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 +1°C

100FT

+34 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV66 FT OAT+16°C ISA DELTA+1°C PRESSURE ALT-16 FT

// Performance equivalent Operating here right now feels like operating at KDWA (Yolo County Davis Woodland Winters Airport, Davis/Woodland/Winters, elev 100 ft) on a standard ISA day.

// Aircraft performance impact ENHANCED

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+1%

-1%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+1%

-0%

Light jetCJ4, Phenom 300, M2

+0%

-0%

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)

FEW013

Few · base 1,300 ft AGL · ~1–2 oktas

FEW009

Few · base 900 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER1,300 ft TOTAL COVERAGE~23% (sparse) FREEZING LEVEL8,147 ft VFR MARGINunlimited

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

13:38ZSUNRISE

20:12ZSOLAR NOON

02:47ZSUNSET

03:14ZCIVIL END

CURRENT01:16Z DAYLIGHT REMAINING1h 30m VFR NIGHT BEGINS03:14Z (1h 57m) DAY LENGTH13h 08m

Waning Gibbous

ILLUMINATION99% MOONRISE02:25Z MOONSET15:34Z FULL MOON IN29 days

// Nearest reporting stations

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

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