// Station · 7m ago

LSMA

Alpnach Air Base

CAT VFR

WIND 050° / 8 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 29°C / 16°C

ALTIM 30.18 inHg

ELEV 1,460 FT

46.9439°N / 8.2842°E

LOCATION · Alpnach, CH

WIND

050°8 kt

LSMA · 1,460 FT

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

METRIC

NOW · 12Z

+6H

+12H

+18H

WIND

050°/8

VIS

6+ SM

CEILING

—

LAYERS

SCT083

T / Td

29 / 16

ALTIM

30.18"

// Interpretation

VFR with moderate winds at 050°/8 kt. Visibility 6+ SM and scattered at 8,300 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 LSMA 271250Z 05008KT 360V070 9999 SCT083 29/16 Q1022 RMK BLU+

LSMA · day 27 at 12:50 UTC · wind from 050° at 8 kt · visibility 6+ SM · scattered layer at 8,300 ft · temp 29°C / dewpoint 16°C · altimeter 30.18" Hg

// Runway analysis · computed from current METAR wind

Wind 050° @ 8 kt

1 USABLE · 1 AVOID

WIND

050°8 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

01★ HDG 010° H6 kt X5 kt RIGHT PRIMARY · 6,135'

TAILWIND ENDS · AVOID 1 ends

19 HDG 190° T6 kt X5 kt LEFT —

Pattern altitude: 2,460 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 +16°C

3,200FT

+1,740 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↗ +200 FT

24h AGO18h12h6hNOW

FIELD ELEV1,460 FT OAT+29°C ISA DELTA+16°C PRESSURE ALT1,200 FT

// Performance equivalent Operating here right now feels like operating at LSGC (Les Eplatures Airport, La Chaux-de-Fonds, elev 3,368 ft) on a standard ISA day.

// Aircraft performance impact SIGNIFICANT

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+32%

-22%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+22%

-14%

Light jetCJ4, Phenom 300, M2

+13%

-10%

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.

// Cloud layers · 1 reported · highest to lowest

// Reported layers (highest → lowest)

SCT083

Scattered · base 8,300 ft AGL · ~3–4 oktas

// Computed

CEILING— HIGHEST LAYER8,300 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL16,106 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC+1)

03:41ZSUNRISE

11:25ZSOLAR NOON

19:09ZSUNSET

19:47ZCIVIL END

CURRENT12:57Z DAYLIGHT REMAINING6h 12m VFR NIGHT BEGINS19:47Z (6h 49m) DAY LENGTH15h 28m

Waxing Gibbous

ILLUMINATION83% MOONRISE12:28Z MOONSET03:56Z FULL MOON IN4 days

// Nearest reporting stations

No nearby reporting stations found within 200 NM of LSMA.

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

AIRSPACE

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