// Station · 1m ago

MSSS

Ilopango International Airport

CAT VFR

WIND 010° / 6 kt

VIS 6+ SM

CEILING Few/scattered only

T/Td 31°C / 21°C

ALTIM 30.00 inHg

ELEV 2,027 FT

13.6995°N / 89.1199°W

LOCATION · San Salvador, SV

WIND

010°6 kt

MSSS · 2,027 FT

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

METRIC

NOW · 17Z

+6H

+12H

+18H

WIND

010°/6

VIS

6+ SM

CEILING

—

LAYERS

FEW023

T / Td

31 / 21

ALTIM

30.00"

// Interpretation

VFR with light winds at 010°/6 kt. Visibility 6+ SM and a few at 2,300 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 MSSS 251700Z 01006KT 300V080 9999 FEW023 31/21 Q1016 A3000 NOSIG

MSSS · day 25 at 17:00 UTC · wind from 010° at 6 kt · visibility 6+ SM · a few clouds at 2,300 ft · temp 31°C / dewpoint 21°C · altimeter 30.00" Hg

// Runway analysis · computed from current METAR wind

Wind 010° @ 6 kt

1 USABLE · 1 AVOID

WIND

010°6 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

33★ HDG 330° H5 kt X4 kt RIGHT PRIMARY · 7,349'

TAILWIND ENDS · AVOID 1 ends

15 HDG 150° T5 kt X4 kt LEFT —

Pattern altitude: 3,027 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 +20°C

4,300FT

+2,273 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV2,027 FT OAT+31°C ISA DELTA+20°C PRESSURE ALT1,945 FT

// Performance equivalent Your aircraft will perform as if it's at a field 4,300 ft high on a standard ISA day — that's +2,273 ft above MSSS's actual elevation.

// Aircraft performance impact SIGNIFICANT

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+43%

-30%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+30%

-19%

Light jetCJ4, Phenom 300, M2

+17%

-13%

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)

FEW023

Few · base 2,300 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER2,300 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL17,684 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-6)

11:46ZSUNRISE

18:00ZSOLAR NOON

00:14ZSUNSET

00:35ZCIVIL END

CURRENT17:01Z DAYLIGHT REMAINING7h 13m VFR NIGHT BEGINS00:35Z (7h 34m) DAY LENGTH12h 28m

Waxing Gibbous

ILLUMINATION94% MOONRISE21:49Z MOONSET10:18Z 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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