// Station · 18m ago

KLAF

Purdue University Airport

CAT VFR

WIND CALM

VIS 10+ SM

CEILING Few/scattered only

T/Td 25.6°C / 13.9°C

ALTIM 30.12 inHg

ELEV 606 FT

40.4129°N / 86.9394°W

LOCATION · West Lafayette, US

WIND

000°0 kt

KLAF · 606 FT

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

METRIC

NOW · 17Z

+6H

+12H

+18H

WIND

CALM

VIS

10+ SM

CEILING

—

LAYERS

SCT046

T / Td

26 / 14

ALTIM

30.12"

// Interpretation

VFR with winds calm. Visibility better than 10 statute miles and scattered at 4,600 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 KLAF 251754Z 00000KT 10SM SCT046 26/14 A3012 RMK AO2 SLP197 T02560139 10256 20133 58006

KLAF · day 25 at 17:54 UTC · winds calm · visibility 10+ SM · scattered layer at 4,600 ft · temp 26°C / dewpoint 14°C · altimeter 30.12" Hg · automated station w/ precipitation discriminator · sea-level pressure 1019.7 mb

// Runway analysis · computed from current METAR wind

Wind CALM

ALL USABLE · WINDS CALM

WIND

000°calm

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 4 ends

10 HDG 100° —CALM —— 6,600'

28 HDG 280° —CALM —— 6,600'

05 HDG 050° —CALM —— 4,225'

23 HDG 230° —CALM —— 4,225'

Pattern altitude: 1,606 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 +11°C

1,800FT

+1,194 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV606 FT OAT+26°C ISA DELTA+11°C PRESSURE ALT402 FT

// Performance equivalent Operating here right now feels like operating at KI16 (Kee Field, Pineville, elev 1,783 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+18%

-13%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+13%

-8%

Light jetCJ4, Phenom 300, M2

+7%

-5%

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)

SCT046

Scattered · base 4,600 ft AGL · ~3–4 oktas

// Computed

CEILING— HIGHEST LAYER4,600 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL13,535 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-6)

11:09ZSUNRISE

17:51ZSOLAR NOON

00:33ZSUNSET

01:01ZCIVIL END

CURRENT18:12Z DAYLIGHT REMAINING6h 20m VFR NIGHT BEGINS01:01Z (6h 48m) DAY LENGTH13h 23m

Waxing Gibbous

ILLUMINATION94% MOONRISE21:16Z MOONSET10:39Z FULL MOON IN2 days

// Nearest reporting stations

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

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