// Station · 29m ago

KM91

Springfield Robertson County Airport

CAT VFR

WIND CALM

VIS 10+ SM

CEILING Few/scattered only

T/Td 17°C / 15°C

ALTIM 30.04 inHg

ELEV 706 FT

36.5368°N / 86.9212°W

LOCATION · Springfield, US

WIND

000°0 kt

KM91 · 706 FT

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

METRIC

NOW · 11Z

+6H

+12H

+18H

WIND

CALM

VIS

10+ SM

CEILING

—

LAYERS

FEW044

T / Td

17 / 15

ALTIM

30.04"

// Interpretation

VFR with winds calm. Visibility better than 10 statute miles and a few at 4,400 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 KM91 131150Z AUTO 00000KT 10SM FEW044 17/15 A3004 RMK A01

KM91 · day 13 at 11:50 UTC · winds calm · visibility 10+ SM · a few clouds at 4,400 ft · temp 17°C / dewpoint 15°C · altimeter 30.04" Hg

// 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 2 ends

04 HDG 040° —CALM —— 5,505'

22 HDG 220° —CALM —— 5,505'

Pattern altitude: 1,706 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 +3°C

1,000FT

+294 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV706 FT OAT+17°C ISA DELTA+3°C PRESSURE ALT582 FT

// Performance equivalent Operating here right now feels like operating at KGKT (Gatlinburg-Pigeon Forge Airport, Sevierville, elev 1,014 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)

FEW044

Few · base 4,400 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER4,400 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL9,292 ft VFR MARGINunlimited

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

11:54ZSUNRISE

17:35ZSOLAR NOON

23:15ZSUNSET

23:41ZCIVIL END

CURRENT12:19Z DAYLIGHT REMAINING10h 56m VFR NIGHT BEGINS23:41Z (11h 21m) DAY LENGTH11h 21m

Waxing Crescent

ILLUMINATION5% MOONRISE13:37Z MOONSET00:59Z FULL MOON IN13 days

// Nearest reporting stations

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

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