// Station · 1h 1m ago · STALE

CYMH

Mary's Harbour Airport

CAT MVFR

WIND 210° / 8 kt

VIS 9.0 SM

CEILING OVC at 2,100 ft

T/Td 22°C / 20°C

ALTIM 29.78 inHg

ELEV 38 FT

52.3028°N / 55.8474°W

LOCATION · Mary's Harbour, CA

WIND

210°8 kt

CYMH · 38 FT

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

METRIC

NOW · 18Z

+6H

+12H

+18H

WIND

210°/8

VIS

9.0 SM

CEILING

OVC021

LAYERS

SCT015 OVC021

T / Td

22 / 20

ALTIM

29.78"

// Interpretation

MVFR — ceiling 2,100 ft. Moderate winds at 210°/8 kt, visibility 9.0 SM, scattered at 1,500 ft, and overcast at 2,100 ft. Would drop to IFR below 1,000 ft ceiling or 3 SM visibility, or rise back to VFR above 3,000 ft and 5 SM.

Loading TAF forecast narrative…

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

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// Raw observation METAR string + decoded

METAR CYMH 251800Z AUTO 21008KT 190V280 9SM SCT015 OVC021 22/20 A2978 RMK SLP087 DENSITY ALT 1100FT

CYMH · day 25 at 18:00 UTC · wind from 210° at 8 kt · visibility 9.0 SM · scattered layer at 1,500 ft · overcast at 2,100 ft · temp 22°C / dewpoint 20°C · altimeter 29.78" Hg · sea-level pressure 1008.7 mb

// Runway analysis · computed from current METAR wind

Wind 210° @ 8 kt

1 USABLE · 1 AVOID · 1 CAUTION

WIND

210°8 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

29★ HDG 290° H1 kt X8 kt LEFT PRIMARY · 2,500'

TAILWIND ENDS · AVOID 1 ends

11 HDG 110° T1 kt X8 kt RIGHT —

Pattern altitude: 1,038 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 +7°C

1,100FT

+1,062 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV38 FT OAT+22°C ISA DELTA+7°C PRESSURE ALT177 FT

// Performance equivalent Operating here right now feels like operating at CZUM (Churchill Falls Airport, Churchill Falls, elev 1,442 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+11%

-8%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+8%

-5%

Light jetCJ4, Phenom 300, M2

+4%

-3%

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)

OVC021

Overcast · base 2,100 ft AGL · 8 oktas

SCT015

Scattered · base 1,500 ft AGL · ~3–4 oktas

// Computed

CEILING2,100 ft AGL HIGHEST LAYER2,100 ft TOTAL COVERAGE~100% (overcast) FREEZING LEVEL11,149 ft VFR MARGIN-900 ft

// Sun & Moon · times in Z · bar = local day (UTC-4)

08:44ZSUNRISE

15:47ZSOLAR NOON

22:49ZSUNSET

23:26ZCIVIL END

CURRENT19:01Z DAYLIGHT REMAINING3h 48m VFR NIGHT BEGINS23:26Z (4h 24m) DAY LENGTH14h 05m

Waxing Gibbous

ILLUMINATION94% MOONRISE18:52Z MOONSET08:57Z FULL MOON IN2 days

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

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