// Station · 9m ago

EGLL

London Heathrow Airport

CAT VFR

WIND 100° / 14 kt

VIS 6+ SM

CEILING CLR

T/Td 25°C / 9°C

ALTIM 29.88 inHg

ELEV 83 FT

51.4708°N / 0.4599°W

LOCATION · London, GB

WIND

100°14 kt

EGLL · 83 FT

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

METRIC

NOW · 12Z

+6H

+12H

+18H

WIND

100°/14

VIS

6+ SM

CEILING

CLR

LAYERS

—

T / Td

25 / 9

ALTIM

29.88"

// Interpretation

VFR with brisk winds at 100°/14 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 251220Z AUTO 10014KT 060V120 9999 NCD 25/09 Q1012

EGLL · day 25 at 12:20 UTC · wind from 100° at 14 kt · visibility 6+ SM · temp 25°C / dewpoint 9°C · altimeter 29.88" Hg

// Runway analysis · computed from current METAR wind

Wind 100° @ 14 kt

2 USABLE · 2 AVOID

WIND

100°14 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 2 usable

09L★ HDG 090° H14 kt X2 kt RIGHT PRIMARY · 12,799'

09R HDG 090° H14 kt X2 kt RIGHT 12,001'

TAILWIND ENDS · AVOID 2 ends

27R HDG 270° T14 kt X2 kt LEFT —

27L HDG 270° T14 kt X2 kt LEFT —

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 +10°C

1,300FT

+1,217 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV83 FT OAT+25°C ISA DELTA+10°C PRESSURE ALT119 FT

// Performance equivalent Operating here right now feels like operating at EGOM (RAF Spadeadam, Spadeadam, elev 1,066 ft) on a standard ISA day.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+13%

-9%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+9%

-6%

Light jetCJ4, Phenom 300, M2

+5%

-4%

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 LEVEL12,709 ft VFR MARGINunlimited

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

05:04ZSUNRISE

12:05ZSOLAR NOON

19:06ZSUNSET

19:42ZCIVIL END

CURRENT12:29Z DAYLIGHT REMAINING6h 36m VFR NIGHT BEGINS19:42Z (7h 12m) DAY LENGTH14h 02m

Waxing Gibbous

ILLUMINATION93% MOONRISE14:59Z MOONSET05:01Z FULL MOON IN3 days

// Nearest reporting stations

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

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