// Station · 17m ago

K46U

Alpine Airport

CAT MVFR

WIND 090° / 8 kt G17

VIS 4.0 SM

CEILING BKN at 11,000 ft

T/Td 28°C / 10°C

ALTIM 30.19 inHg

WX HZ

ELEV 5,634 FT

43.1819°N / 111.0387°W

LOCATION · Alpine, US

WIND

090°8 kt

K46U · 5,634 FT

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

METRIC

NOW · 21Z

+6H

+12H

+18H

WIND

090°/8G17

VIS

4.0 SM

CEILING

BKN110

LAYERS

FEW028 FEW044 BKN110

T / Td

28 / 10

ALTIM

30.19"

// Interpretation

MVFR — visibility 4.0 SM. Moderate winds at 090°/8 kt, gusting 17, visibility 4.0 SM, a few at 2,800 ft, a few at 4,400 ft, and broken at 11,000 ft. Reported weather: HZ. Would drop to IFR below 1,000 ft ceiling or 3 SM visibility, or rise back to VFR above 3,000 ft and 5 SM.

Loading TAF forecast narrative…

SOURCES · NOAA Aviation Weather Center METAR (TAF loading…)

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// Raw observation METAR string + decoded

METAR K46U 142155Z AUTO 09008G17KT 4SM HZ FEW028 FEW044 BKN110 28/10 A3019 RMK A01 P0001

K46U · day 14 at 21:55 UTC · wind from 090° at 8 kt, gusts to 17 kt · visibility 4.0 SM · a few clouds at 2,800 ft · a few clouds at 4,400 ft · broken layer at 11,000 ft · temp 28°C / dewpoint 10°C · altimeter 30.19" Hg · weather: HZ

// Runway analysis · computed from current METAR wind

Wind 090° @ 8 ktG17

1 USABLE · 1 AVOID

WIND

090°8G17 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

13★ HDG 130° H6 kt X5 kt LEFT PRIMARY · 5,827'

TAILWIND ENDS · AVOID 1 ends

31 HDG 310° T6 kt X5 kt RIGHT —

Pattern altitude: 6,634 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 +24°C

8,200FT

+2,566 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↘ -700 FT

24h AGO18h12h6hNOW

FIELD ELEV5,634 FT OAT+28°C ISA DELTA+24°C PRESSURE ALT5,363 FT

// Performance equivalent Operating here right now feels like operating at KGNB (Granby Grand County Airport, Granby, elev 8,203 ft) on a standard ISA day.

// Aircraft performance impact DANGEROUS

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+82%

-57%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+57%

-37%

Light jetCJ4, Phenom 300, M2

+33%

-25%

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 · 3 reported · highest to lowest

// Reported layers (highest → lowest)

BKN110

Broken · base 11,000 ft AGL · ~5–7 oktas

FEW044

Few · base 4,400 ft AGL · ~1–2 oktas

FEW028

Few · base 2,800 ft AGL · ~1–2 oktas

// Computed

CEILING11,000 ft AGL HIGHEST LAYER11,000 ft TOTAL COVERAGE~91% (overcast) FREEZING LEVEL19,775 ft VFR MARGIN+8,000 ft

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

11:58ZSUNRISE

19:31ZSOLAR NOON

03:03ZSUNSET

03:38ZCIVIL END

CURRENT22:12Z DAYLIGHT REMAINING4h 51m VFR NIGHT BEGINS03:38Z (5h 25m) DAY LENGTH15h 05m

New Moon

ILLUMINATION0% MOONRISE12:04Z MOONSET03:10Z FULL MOON IN15 days

// Nearest reporting stations · 5 shown · 60 NM radius

KAFO

VFR

Afton Municipal Airport · Afton

WIND: 260° / 9 kt
VIS: 10+ SM
CEILING: OVC120
DIST: 29 NM S
AGE: 17m ago

KJAC

VFR

Jackson Hole Airport · Jackson

WIND: 220° / 13 ktG22
VIS: 10+ SM
CEILING: SCT110
DIST: 29 NM NE
AGE: 1m ago

KDIJ

VFR

Driggs/Reed Memorial Airport · Driggs

WIND: 340° / 14 kt
VIS: 10+ SM
CEILING: CLR
DIST: 34 NM N
AGE: 16m ago

KIDA

VFR

Idaho Falls Regional Airport · Idaho Falls

WIND: 210° / 20 ktG28
VIS: 10+ SM
CEILING: CLR
DIST: 49 NM NW
AGE: 19m ago

KRXE

VFR

Rexburg Madison County Airport · Rexburg

WIND: 220° / 11 ktG22
VIS: 10+ SM
CEILING: CLR
DIST: 51 NM NW
AGE: 19m ago

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

AIRSPACE

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