// Station · 1h 1m ago · STALE

ZLLL

Lanzhou Zhongchuan International Airport

CAT VFR

WIND 060° / 6 kt

VIS 6+ SM

CEILING OVC at 3,600 ft

T/Td 20°C / 13°C

ALTIM 30.06 inHg

ELEV 6,388 FT

36.5152°N / 103.6200°E

LOCATION · Lanzhou (Yongdeng), CN

WIND

060°6 kt

ZLLL · 6,388 FT

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

METRIC

NOW · 16Z

+6H

+12H

+18H

WIND

060°/6

VIS

6+ SM

CEILING

OVC036

LAYERS

OVC036

T / Td

20 / 13

ALTIM

30.06"

// Interpretation

VFR — ceiling 3,600 ft. Light winds at 060°/6 kt, visibility 6+ SM, overcast at 3,600 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 ZLLL 251600Z 06003MPS 030V090 9999 OVC036 20/13 Q1018 NOSIG

ZLLL · day 25 at 16:00 UTC · wind from 060° at 6 kt · visibility 6+ SM · overcast at 3,600 ft · temp 20°C / dewpoint 13°C · altimeter 30.06" Hg

// Runway analysis · computed from current METAR wind

Wind 060° @ 6 kt

3 USABLE · 3 AVOID

WIND

060°6 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 3 usable

01★ HDG 010° H4 kt X5 kt RIGHT PRIMARY · 13,123'

36R HDG 360° H3 kt X5 kt RIGHT 13,123'

36L HDG 360° H3 kt X5 kt RIGHT 11,811'

TAILWIND ENDS · AVOID 3 ends

18L HDG 180° T3 kt X5 kt LEFT —

18R HDG 180° T3 kt X5 kt LEFT —

19 HDG 190° T4 kt X5 kt LEFT —

Pattern altitude: 7,388 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 +17°C

8,300FT

+1,912 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV6,388 FT OAT+20°C ISA DELTA+17°C PRESSURE ALT6,246 FT

// Performance equivalent Operating here right now feels like operating at ZHSN (Shennongjia Hongping Airport, Shennongjia (Hongping), elev 8,365 ft) on a standard ISA day.

// Aircraft performance impact SIGNIFICANT

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+83%

-58%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+58%

-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. 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)

OVC036

Overcast · base 3,600 ft AGL · 8 oktas

// Computed

CEILING3,600 ft AGL HIGHEST LAYER3,600 ft TOTAL COVERAGE~100% (overcast) FREEZING LEVEL16,489 ft VFR MARGIN+600 ft

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

22:32ZSUNRISE

05:09ZSOLAR NOON

11:45ZSUNSET

12:11ZCIVIL END

CURRENT17:01Z DAYLIGHT REMAINING18h 43m VFR NIGHT BEGINS12:11Z (19h 10m) DAY LENGTH13h 12m

Waxing Gibbous

ILLUMINATION94% MOONRISE08:36Z MOONSET21:48Z FULL MOON IN2 days

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

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