// Station · 23m ago

KGNB

Granby Grand County Airport

CAT VFR

WIND 240° / 6 kt

VIS 10+ SM

CEILING OVC at 8,000 ft

T/Td 20.6°C / 4.9°C

ALTIM 30.47 inHg

ELEV 8,203 FT

40.0897°N / 105.9170°W

LOCATION · Granby, US

WIND

240°6 kt

KGNB · 8,203 FT

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

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

240°/6

VIS

10+ SM

CEILING

OVC080

LAYERS

OVC080

T / Td

21 / 5

ALTIM

30.47"

// Interpretation

VFR — ceiling 8,000 ft. Light winds at 240°/6 kt, visibility better than 10 statute miles, overcast at 8,000 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 KGNB 290055Z AUTO 24006KT 10SM OVC080 21/05 A3047 RMK AO2 T02060049

KGNB · day 29 at 00:55 UTC · wind from 240° at 6 kt · visibility 10+ SM · overcast at 8,000 ft · temp 21°C / dewpoint 5°C · altimeter 30.47" Hg · automated station w/ precipitation discriminator

// Runway analysis · computed from current METAR wind

Wind 240° @ 6 kt

1 USABLE · 1 AVOID

WIND

240°6 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

27★ HDG 270° H5 kt X3 kt LEFT PRIMARY · 5,001'

TAILWIND ENDS · AVOID 1 ends

09 HDG 090° T5 kt X3 kt RIGHT —

Pattern altitude: 9,203 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 +21°C

10,100FT

+1,897 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV8,203 FT OAT+21°C ISA DELTA+21°C PRESSURE ALT7,651 FT

// Performance equivalent Operating here right now feels like operating at KLXV (Lake County Airport, Leadville, elev 9,927 ft) on a standard ISA day.

// Aircraft performance impact DANGEROUS

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+101%

-71%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+71%

-45%

Light jetCJ4, Phenom 300, M2

+40%

-30%

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)

OVC080

Overcast · base 8,000 ft AGL · 8 oktas

// Computed

CEILING8,000 ft AGL HIGHEST LAYER8,000 ft TOTAL COVERAGE~100% (overcast) FREEZING LEVEL18,607 ft VFR MARGIN+5,000 ft

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

12:28ZSUNRISE

19:06ZSOLAR NOON

01:43ZSUNSET

02:11ZCIVIL END

CURRENT01:18Z DAYLIGHT REMAINING25m VFR NIGHT BEGINS02:11Z (53m) DAY LENGTH13h 14m

Waning Gibbous

ILLUMINATION99% MOONRISE01:16Z MOONSET14:30Z FULL MOON IN29 days

// Nearest reporting stations

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

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