// Station · 25m ago

EGSS

London Stansted Airport

CAT VFR

WIND 090° / 12 kt

VIS 6+ SM

CEILING CLR

T/Td 25°C / 8°C

ALTIM 29.91 inHg

ELEV 348 FT

51.8850°N / 0.2350°E

LOCATION · London, Essex, GB

WIND

090°12 kt

EGSS · 348 FT

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

METRIC

NOW · 15Z

+6H

+12H

+18H

WIND

090°/12

VIS

6+ SM

CEILING

CLR

LAYERS

—

T / Td

25 / 8

ALTIM

29.91"

// Interpretation

VFR with moderate winds at 090°/12 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 EGSS 251550Z AUTO 09012KT 9999 NCD 25/08 Q1013

EGSS · day 25 at 15:50 UTC · wind from 090° at 12 kt · visibility 6+ SM · temp 25°C / dewpoint 8°C · altimeter 29.91" Hg

// Runway analysis · computed from current METAR wind

Wind 090° @ 12 kt

1 USABLE · 1 AVOID · 1 CAUTION

WIND

090°12 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

04★ HDG 040° H8 kt X9 kt RIGHT PRIMARY · 10,003'

TAILWIND ENDS · AVOID 1 ends

22 HDG 220° T8 kt X9 kt LEFT —

Pattern altitude: 1,348 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 +11°C

1,600FT

+1,252 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV348 FT OAT+25°C ISA DELTA+11°C PRESSURE ALT354 FT

// Performance equivalent Your aircraft will perform as if it's at a field 1,600 ft high on a standard ISA day — that's +1,252 ft above EGSS's actual elevation.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+16%

-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 LEVEL12,974 ft VFR MARGINunlimited

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

05:00ZSUNRISE

12:02ZSOLAR NOON

19:04ZSUNSET

19:41ZCIVIL END

CURRENT16:15Z DAYLIGHT REMAINING2h 49m VFR NIGHT BEGINS19:41Z (3h 25m) DAY LENGTH14h 04m

Waxing Gibbous

ILLUMINATION94% MOONRISE15:03Z MOONSET05:07Z FULL MOON IN2 days

// Nearest reporting stations

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

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