// Station · 22m ago

KSEA

Seattle–Tacoma International Airport

CAT VFR

WIND CALM

VIS 10+ SM

CEILING Few/scattered only

T/Td 15.6°C / 1.7°C

ALTIM 30.05 inHg

ELEV 433 FT

47.4479°N / 122.3103°W

LOCATION · Seattle, US

WIND

000°0 kt

KSEA · 433 FT

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

METRIC

NOW · 23Z

+6H

+12H

+18H

WIND

CALM

VIS

10+ SM

CEILING

—

LAYERS

FEW040 FEW230

T / Td

16 / 2

ALTIM

30.05"

// Interpretation

VFR with winds calm. Visibility better than 10 statute miles and a few at 4,000 ft, and a few at 23,000 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 KSEA 122353Z 00000KT 10SM FEW040 FEW230 16/02 A3005 RMK AO2 SLP182 T01560017 10161 20111 55000

KSEA · day 12 at 23:53 UTC · winds calm · visibility 10+ SM · a few clouds at 4,000 ft · a few clouds at 23,000 ft · temp 16°C / dewpoint 2°C · altimeter 30.05" Hg · automated station w/ precipitation discriminator · sea-level pressure 1018.2 mb

// Runway analysis · computed from current METAR wind

Wind CALM

ALL USABLE · WINDS CALM

WIND

000°calm

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 6 ends

16L HDG 160° —CALM —— 11,901'

34R HDG 340° —CALM —— 11,901'

16C HDG 160° —CALM —— 9,426'

34C HDG 340° —CALM —— 9,426'

16R HDG 160° —CALM —— 8,500'

34L HDG 340° —CALM —— 8,500'

Pattern altitude: 1,433 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

400FT

-33 FT BELOW FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV433 FT OAT+16°C ISA DELTA+1°C PRESSURE ALT300 FT

// Performance equivalent Operating here right now feels like operating at KRLD (Richland Airport, Richland, elev 394 ft) on a standard ISA day.

// Aircraft performance impact ENHANCED

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 · 2 reported · highest to lowest

// Reported layers (highest → lowest)

FEW230

Few · base 23,000 ft AGL · ~1–2 oktas

FEW040

Few · base 4,000 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER23,000 ft TOTAL COVERAGE~23% (sparse) FREEZING LEVEL8,312 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-8)

14:24ZSUNRISE

19:56ZSOLAR NOON

01:29ZSUNSET

01:59ZCIVIL END

CURRENT00:15Z DAYLIGHT REMAINING1h 13m VFR NIGHT BEGINS01:59Z (1h 44m) DAY LENGTH11h 04m

Waxing Crescent

ILLUMINATION3% MOONRISE15:43Z MOONSET02:48Z FULL MOON IN13 days

// Nearest reporting stations

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

AIRSPACE

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