// Station · 1h 11m ago · STALE

LIRV

Viterbo Airport

CAT VFR

WIND 120° / 8 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 22°C / 21°C

ALTIM 29.88 inHg

ELEV 992 FT

42.4353°N / 12.0614°E

LOCATION · Viterbo, IT

WIND

120°8 kt

LIRV · 992 FT

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

METRIC

NOW · 12Z

+6H

+12H

+18H

WIND

120°/8

VIS

6+ SM

CEILING

—

LAYERS

SCT020

T / Td

22 / 21

ALTIM

29.88"

// Interpretation

VFR with moderate winds at 120°/8 kt. Visibility 6+ SM and scattered at 2,000 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 LIRV 251255Z 12008KT 9999 SCT020 22/21 Q1012

LIRV · day 25 at 12:55 UTC · wind from 120° at 8 kt · visibility 6+ SM · scattered layer at 2,000 ft · temp 22°C / dewpoint 21°C · altimeter 29.88" Hg

// Runway analysis · computed from current METAR wind

Wind 120° @ 8 kt

3 USABLE · 3 AVOID · 3 CAUTION

WIND

120°8 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 3 usable

04C★ HDG 040° H1 kt X8 kt RIGHT PRIMARY · 4,265'

04L HDG 040° H1 kt X8 kt RIGHT ⚠ HIGH XW · 100%

04R HDG 040° H1 kt X8 kt RIGHT ⚠ HIGH XW · 100%

TAILWIND ENDS · AVOID 3 ends

22C HDG 220° T1 kt X8 kt LEFT —

22R HDG 220° T1 kt X8 kt LEFT —

22L HDG 220° T1 kt X8 kt LEFT —

Pattern altitude: 1,992 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 +9°C

2,100FT

+1,108 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV992 FT OAT+22°C ISA DELTA+9°C PRESSURE ALT1,028 FT

// Performance equivalent Operating here right now feels like operating at LIMW (Aosta Corrado Gex Airport, Saint-Christophe (AO), elev 1,791 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+21%

-15%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+15%

-9%

Light jetCJ4, Phenom 300, M2

+8%

-6%

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)

SCT020

Scattered · base 2,000 ft AGL · ~3–4 oktas

// Computed

CEILING— HIGHEST LAYER2,000 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL12,103 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC+1)

04:30ZSUNRISE

11:15ZSOLAR NOON

18:00ZSUNSET

18:29ZCIVIL END

CURRENT14:06Z DAYLIGHT REMAINING3h 53m VFR NIGHT BEGINS18:29Z (4h 22m) DAY LENGTH13h 29m

Waxing Gibbous

ILLUMINATION93% MOONRISE14:28Z MOONSET03:58Z FULL MOON IN3 days

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

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