// Station · 5m ago

EGLL

London Heathrow Airport

CAT VFR

WIND 230° / 11 kt

VIS 6+ SM

CEILING CLR

T/Td 14°C / 9°C

ALTIM 29.97 inHg

ELEV 83 FT

51.4708°N / 0.4599°W

LOCATION · London, GB

WIND

230°11 kt

EGLL · 83 FT

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

METRIC

NOW · 01Z

+6H

+12H

+18H

WIND

230°/11

VIS

6+ SM

CEILING

CLR

LAYERS

—

T / Td

14 / 9

ALTIM

29.97"

// Interpretation

VFR with moderate winds at 230°/11 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 EGLL 170120Z AUTO 23011KT 9999 NCD 14/09 Q1015

EGLL · day 17 at 01:20 UTC · wind from 230° at 11 kt · visibility 6+ SM · temp 14°C / dewpoint 9°C · altimeter 29.97" Hg

// Runway analysis · computed from current METAR wind

Wind 230° @ 11 kt

2 USABLE · 2 AVOID · 2 CAUTION

WIND

230°11 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 2 usable

27R★ HDG 270° H8 kt X7 kt LEFT PRIMARY · 12,799'

27L HDG 270° H8 kt X7 kt LEFT ⚠ HIGH XW · 64%

TAILWIND ENDS · AVOID 2 ends

09L HDG 090° T8 kt X7 kt RIGHT —

09R HDG 090° T8 kt X7 kt RIGHT —

Pattern altitude: 1,083 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

-100FT

-183 FT BELOW FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV83 FT OAT+14°C ISA DELTA-1°C PRESSURE ALT30 FT

// Performance equivalent Operating here right now feels like operating at EGSD (Great Yarmouth - North Denes Heliport, Great Yarmouth, Norfolk, elev 6 ft) on a standard ISA day.

// Aircraft performance impact ENHANCED

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+0%

-0%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+0%

-0%

Light jetCJ4, Phenom 300, M2

+0%

-0%

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 LEVEL7,154 ft VFR MARGINunlimited

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

05:40ZSUNRISE

11:57ZSOLAR NOON

18:14ZSUNSET

18:48ZCIVIL END

CURRENT01:25Z DAYLIGHT REMAINING16h 49m VFR NIGHT BEGINS18:48Z (17h 23m) DAY LENGTH12h 34m

Waxing Crescent

ILLUMINATION28% MOONRISE09:54Z MOONSET22:28Z FULL MOON IN10 days

// Nearest reporting stations

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

AIRSPACE

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