// Station · 24m ago

LFRI

La Roche-sur-Yon Les Ajoncs Airport

CAT LIFR

WIND 220° / 4 kt

VIS 0.56 SM

CEILING —

T/Td 18°C / 18°C

ALTIM 30.15 inHg

WX FG

ELEV 299 FT

46.7019°N / 1.3786°W

LOCATION · La Roche-sur-Yon, FR

WIND

220°4 kt

LFRI · 299 FT

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

METRIC

NOW · 01Z

+6H

+12H

+18H

WIND

220°/4

VIS

0.56 SM

CEILING

CLR

LAYERS

—

T / Td

18 / 18

ALTIM

30.15"

// Interpretation

LIFR — visibility 0.56 SM. Light winds at 220°/4 kt, visibility 0.56 SM, no reported cloud layers. Reported weather: fog (FG). Fog is water droplets suspended at the surface with visibility under 5/8 SM; it typically burns off with daytime heating or a pickup in wind. LIFR is the lowest standard category. Would improve to IFR above 500 ft and 1 SM.

Loading TAF forecast narrative…

SOURCES · NOAA Aviation Weather Center METAR (TAF loading…)

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// Raw observation METAR string + decoded

METAR LFRI 130130Z AUTO 22004KT 190V250 0900 R28/1300D FG VV/// 18/18 Q1021

LFRI · day 13 at 01:30 UTC · wind from 220° at 4 kt · visibility 0.56 SM · temp 18°C / dewpoint 18°C · altimeter 30.15" Hg · weather: fog (FG)

// Runway analysis · computed from current METAR wind

Wind 220° @ 4 kt

ALL USABLE · WINDS CALM

WIND

220°4 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

10 HDG 100° —CALM —— 5,085'

28 HDG 280° —CALM —— 5,085'

Pattern altitude: 1,299 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 +3°C

400FT

+101 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV299 FT OAT+18°C ISA DELTA+3°C PRESSURE ALT69 FT

// Performance equivalent Operating here right now feels like operating at LFOV (Laval-Entrammes Airport, Laval, Mayenne, elev 330 ft) on a standard ISA day.

// Aircraft performance impact MINOR

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+4%

-3%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+3%

-2%

Light jetCJ4, Phenom 300, M2

+2%

-1%

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 LEVEL9,390 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC+0)

06:21ZSUNRISE

11:52ZSOLAR NOON

17:24ZSUNSET

17:55ZCIVIL END

CURRENT01:54Z DAYLIGHT REMAINING15h 30m VFR NIGHT BEGINS17:55Z (16h 00m) DAY LENGTH11h 03m

Waxing Crescent

ILLUMINATION3% MOONRISE07:43Z MOONSET18:47Z 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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