// Station · 35m ago

VVCI

Cat Bi International Airport

CAT VFR

WIND 030° / 3 kt

VIS 6+ SM

CEILING CLR

T/Td 29°C / 23°C

ALTIM 30.06 inHg

ELEV 6 FT

20.8174°N / 106.7243°E

LOCATION · Haiphong (Hai An), VN

WIND

030°3 kt

VVCI · 6 FT

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

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

030°/3

VIS

6+ SM

CEILING

CLR

LAYERS

—

T / Td

29 / 23

ALTIM

30.06"

// Interpretation

VFR with light winds at 030°/3 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 VVCI 130030Z 03003KT 360V070 CAVOK 29/23 Q1018 NOSIG

VVCI · day 13 at 00:30 UTC · wind from 030° at 3 kt · visibility 6+ SM · temp 29°C / dewpoint 23°C · altimeter 30.06" Hg

// Runway analysis · computed from current METAR wind

Wind 030° @ 3 kt

ALL USABLE · WINDS CALM

WIND

030°3 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

07 HDG 070° —CALM —— 10,007'

25 HDG 250° —CALM —— 10,007'

Pattern altitude: 1,006 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 +14°C

1,500FT

+1,494 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV6 FT OAT+29°C ISA DELTA+14°C PRESSURE ALT-136 FT

// Performance equivalent Operating here right now feels like operating at VVDB (Dien Bien Phu Airport, Dien Bien Phu, elev 1,611 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+15%

-11%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+11%

-7%

Light jetCJ4, Phenom 300, M2

+6%

-5%

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 LEVEL14,652 ft VFR MARGINunlimited

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

22:48ZSUNRISE

04:40ZSOLAR NOON

10:32ZSUNSET

10:54ZCIVIL END

CURRENT01:05Z DAYLIGHT REMAINING9h 26m VFR NIGHT BEGINS10:54Z (9h 48m) DAY LENGTH11h 43m

Waxing Crescent

ILLUMINATION3% MOONRISE00:09Z MOONSET11:53Z FULL MOON IN13 days

// Nearest reporting stations

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

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