// Station · 1h 5m ago · STALE

CYSN

Niagara District Airport

CAT VFR

WIND 280° / 4 kt

VIS 10+ SM

CEILING Few/scattered only

T/Td 20°C / 19°C

ALTIM 29.89 inHg

ELEV 321 FT

43.1916°N / 79.1717°W

LOCATION · Niagara-on-the-Lake, CA

WIND

280°4 kt

CYSN · 321 FT

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

METRIC

NOW · 12Z

+6H

+12H

+18H

WIND

280°/4

VIS

10+ SM

CEILING

—

LAYERS

SCT250

T / Td

20 / 19

ALTIM

29.89"

// Interpretation

VFR with light winds at 280°/4 kt. Visibility better than 10 statute miles and scattered 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 CYSN 131200Z 28004KT 10SM SCT250 20/19 A2989 RMK CI4 SLP121 DENSITY ALT 1100FT

CYSN · day 13 at 12:00 UTC · wind from 280° at 4 kt · visibility 10+ SM · scattered layer at 25,000 ft · temp 20°C / dewpoint 19°C · altimeter 29.89" Hg · sea-level pressure 1012.1 mb

// Runway analysis · computed from current METAR wind

Wind 280° @ 4 kt

ALL USABLE · WINDS CALM

WIND

280°4 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 6 ends

06 HDG 060° —CALM —— 5,000'

24 HDG 240° —CALM —— 5,000'

01 HDG 010° —CALM —— 2,500'

19 HDG 190° —CALM —— 2,500'

11 HDG 110° —CALM —— 2,000'

29 HDG 290° —CALM —— 2,000'

Pattern altitude: 1,321 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 +6°C

1,000FT

+679 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV321 FT OAT+20°C ISA DELTA+6°C PRESSURE ALT348 FT

// Performance equivalent Operating here right now feels like operating at CYOS (Owen Sound / Billy Bishop Regional Airport, Owen Sound, elev 1,007 ft) on a standard ISA day.

// Aircraft performance impact MINOR

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+10%

-7%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+7%

-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 · 1 reported · highest to lowest

// Reported layers (highest → lowest)

SCT250

Scattered · base 25,000 ft AGL · ~3–4 oktas

// Computed

CEILING— HIGHEST LAYER25,000 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL10,422 ft VFR MARGINunlimited

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

10:21ZSUNRISE

17:22ZSOLAR NOON

00:24ZSUNSET

00:55ZCIVIL END

CURRENT13:05Z DAYLIGHT REMAINING11h 18m VFR NIGHT BEGINS00:55Z (11h 49m) DAY LENGTH14h 03m

New Moon

ILLUMINATION0% MOONRISE10:32Z MOONSET00:35Z FULL MOON IN15 days

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

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