// Station · 25m ago

LSZG

Grenchen Airfield

CAT VFR

WIND VRB / 1 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 24°C / 17°C

ALTIM 29.91 inHg

ELEV 1,411 FT

47.1816°N / 7.4172°E

LOCATION · Grenchen, CH

WIND

VRB1 kt

LSZG · 1,411 FT

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

METRIC

NOW · 15Z

+6H

+12H

+18H

WIND

VRB/1

VIS

6+ SM

CEILING

—

LAYERS

SCT055

T / Td

24 / 17

ALTIM

29.91"

// Interpretation

VFR with light winds at variable/1 kt. Visibility 6+ SM and scattered at 5,500 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 LSZG 251550Z AUTO VRB01KT 9999 SCT055 24/17 Q1013

LSZG · day 25 at 15:50 UTC · wind variable at 1 kt · visibility 6+ SM · scattered layer at 5,500 ft · temp 24°C / dewpoint 17°C · altimeter 29.91" Hg

// Runway analysis · computed from current METAR wind

Wind VRB @ 1 kt

ALL USABLE · WINDS CALM

WIND

VRB1 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 8 ends

06 HDG 060° —CALM —— 3,281'

24 HDG 240° —CALM —— 3,281'

06R HDG 060° —CALM —— 2,297'

24L HDG 240° —CALM —— 2,297'

06G HDG 060° —CALM —— 2,295'

24G HDG 240° —CALM —— 2,295'

06L HDG 060° —CALM —— 1,640'

24R HDG 240° —CALM —— 1,640'

Pattern altitude: 2,411 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 +12°C

2,800FT

+1,389 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV1,411 FT OAT+24°C ISA DELTA+12°C PRESSURE ALT1,417 FT

// Performance equivalent Your aircraft will perform as if it's at a field 2,800 ft high on a standard ISA day — that's +1,389 ft above LSZG's actual elevation.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+28%

-20%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+20%

-13%

Light jetCJ4, Phenom 300, M2

+11%

-8%

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)

SCT055

Scattered · base 5,500 ft AGL · ~3–4 oktas

// Computed

CEILING— HIGHEST LAYER5,500 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL13,532 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC+0)

04:41ZSUNRISE

11:34ZSOLAR NOON

18:26ZSUNSET

18:59ZCIVIL END

CURRENT16:15Z DAYLIGHT REMAINING2h 11m VFR NIGHT BEGINS18:59Z (2h 43m) DAY LENGTH13h 45m

Waxing Gibbous

ILLUMINATION94% MOONRISE14:43Z MOONSET04:29Z FULL MOON IN2 days

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

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