// Station · 7m ago

KBTM

Bert Mooney Airport

CAT VFR

WIND 090° / 3 kt

VIS 10+ SM

CEILING Few/scattered only

T/Td 20.6°C / 3.9°C

ALTIM 30.33 inHg

ELEV 5,550 FT

45.9548°N / 112.4970°W

LOCATION · Butte, US

WIND

090°3 kt

KBTM · 5,550 FT

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

METRIC

NOW · 16Z

+6H

+12H

+18H

WIND

090°/3

VIS

10+ SM

CEILING

—

LAYERS

FEW110

T / Td

21 / 4

ALTIM

30.33"

// Interpretation

VFR with light winds at 090°/3 kt. Visibility better than 10 statute miles and a few at 11,000 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 KBTM 251653Z AUTO 09003KT 10SM FEW110 21/04 A3033 RMK AO2 SLP222 T02060039

KBTM · day 25 at 16:53 UTC · wind from 090° at 3 kt · visibility 10+ SM · a few clouds at 11,000 ft · temp 21°C / dewpoint 4°C · altimeter 30.33" Hg · automated station w/ precipitation discriminator · sea-level pressure 1022.2 mb

// Runway analysis · computed from current METAR wind

Wind 090° @ 3 kt

ALL USABLE · WINDS CALM

WIND

090°3 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 4 ends

15 HDG 150° —CALM —— 9,000'

33 HDG 330° —CALM —— 9,000'

12 HDG 120° —CALM —— 5,100'

30 HDG 300° —CALM —— 5,100'

Pattern altitude: 6,550 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

7,000FT

+1,450 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV5,550 FT OAT+21°C ISA DELTA+16°C PRESSURE ALT5,137 FT

// Performance equivalent Operating here right now feels like operating at KWYS (Yellowstone Airport, West Yellowstone, elev 6,649 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+70%

-49%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+49%

-32%

Light jetCJ4, Phenom 300, M2

+28%

-21%

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)

FEW110

Few · base 11,000 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER11,000 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL15,954 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-7)

12:43ZSUNRISE

19:33ZSOLAR NOON

02:23ZSUNSET

02:55ZCIVIL END

CURRENT17:00Z DAYLIGHT REMAINING9h 22m VFR NIGHT BEGINS02:55Z (9h 54m) DAY LENGTH13h 40m

Waxing Gibbous

ILLUMINATION94% MOONRISE22:47Z MOONSET12:27Z FULL MOON IN2 days

// Nearest reporting stations

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

AIRSPACE

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