// Station · 1h 4m ago · STALE

ZLLL

Lanzhou Zhongchuan International Airport

CAT VFR

WIND 010° / 2 kt

VIS 6+ SM

CEILING CLR

T/Td 4°C / 1°C

ALTIM 30.42 inHg

ELEV 6,388 FT

36.5152°N / 103.6200°E

LOCATION · Lanzhou (Yongdeng), CN

WIND

010°2 kt

ZLLL · 6,388 FT

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

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

010°/2

VIS

6+ SM

CEILING

CLR

LAYERS

—

T / Td

4 / 1

ALTIM

30.42"

// Interpretation

VFR with light winds at 010°/2 kt. Visibility 6+ SM and no reported cloud layers. 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 130000Z 01001MPS CAVOK 04/01 Q1030 NOSIG

ZLLL · day 13 at 00:00 UTC · wind from 010° at 2 kt · visibility 6+ SM · temp 4°C / dewpoint 1°C · altimeter 30.42" Hg

// Runway analysis · computed from current METAR wind

Wind 010° @ 2 kt

ALL USABLE · WINDS CALM

WIND

010°2 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 6 ends

01 HDG 010° —CALM —— 13,123'

19 HDG 190° —CALM —— 13,123'

18L HDG 180° —CALM —— 13,123'

36R HDG 360° —CALM —— 13,123'

18R HDG 180° —CALM —— 11,811'

36L HDG 360° —CALM —— 11,811'

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 +1°C

6,000FT

-388 FT BELOW FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV6,388 FT OAT+4°C ISA DELTA+1°C PRESSURE ALT5,892 FT

// Performance equivalent Operating here right now feels like operating at ZLGY (Guyuan Liupanshan Airport, Guyuan (Yuanzhou), elev 5,727 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+60%

-42%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+42%

-27%

Light jetCJ4, Phenom 300, M2

+24%

-18%

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 · clear · no layers reported

// Reported layers (highest → lowest)

CLR

No reported cloud layers — clear sky from surface to reporting ceiling.

// Computed

CEILING— HIGHEST LAYER— TOTAL COVERAGEclear FREEZING LEVEL8,408 ft VFR MARGINunlimited

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

23:11ZSUNRISE

04:53ZSOLAR NOON

10:34ZSUNSET

11:00ZCIVIL END

CURRENT01:04Z DAYLIGHT REMAINING9h 29m VFR NIGHT BEGINS11:00Z (9h 55m) DAY LENGTH11h 23m

Waxing Crescent

ILLUMINATION3% MOONRISE00:32Z MOONSET11:55Z FULL MOON IN13 days

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

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