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// Station · 8m ago

KSEA

Seattle–Tacoma International Airport
CAT VFR
WIND 270° / 5 kt
VIS 10+ SM
CEILING BKN at 8,000 ft
T/Td 15°C / 9.4°C
ALTIM 30.00 inHg
ELEV 433 FT
47.4479°N / 122.3103°W
LOCATION · Seattle, US
N
WIND
270°5 kt
KSEA · 433 FT
© OSM · CartoDB

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

METRIC
NOW · 14Z
+6H
+12H
+18H
WIND
270°/5
 
 
 
VIS
10+ SM
 
 
 
CEILING
BKN080
 
 
 
LAYERS
FEW020 BKN080 BKN200
 
 
 
T / Td
15 / 9
 
 
 
ALTIM
30.00"
 
 
 

// Interpretation

VFR — ceiling 8,000 ft. Light winds at 270°/5 kt, visibility better than 10 statute miles, a few at 2,000 ft, broken at 8,000 ft, and broken at 20,000 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 111453Z 27005KT 10SM FEW020 BKN080 BKN200 15/09 A3000 RMK AO2 SLP163 T01500094 53017 $

KSEA · day 11 at 14:53 UTC · wind from 270° at 5 kt · visibility 10+ SM · a few clouds at 2,000 ft · broken layer at 8,000 ft · broken layer at 20,000 ft · temp 15°C / dewpoint 9°C · altimeter 30.00" Hg · automated station w/ precipitation discriminator · sea-level pressure 1016.3 mb

// Runway analysis · computed from current METAR wind

Wind 270° @ 5 kt
3 USABLE · 3 AVOID
N
WIND
270°5 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
HEADWIND ENDS 3 usable
34C HDG 340° H2 kt X5 kt LEFT PRIMARY · 9,426'
34R HDG 340° H2 kt X5 kt LEFT 11,901'
34L HDG 340° H2 kt X5 kt LEFT 8,500'
TAILWIND ENDS · AVOID 3 ends
16C HDG 160° T2 kt X5 kt RIGHT
16L HDG 160° T2 kt X5 kt RIGHT
16R HDG 160° T2 kt X5 kt RIGHT
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 ↘ -200 FT
1,900 1,050 200
24h AGO18h12h6hNOW
FIELD ELEV433 FT OAT+15°C ISA DELTA+1°C PRESSURE ALT351 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 MINOR
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.

// Cloud layers · 3 reported · highest to lowest

FT 0 5k 10k 15k 20k 25k FRZ LVL · 8,009 FT FEW020 BKN080 · CEILING BKN200 KSEA ELEV · 433 FT
// Reported layers (highest → lowest)
BKN200
Broken · base 20,000 ft AGL · ~5–7 oktas
BKN080
Broken · base 8,000 ft AGL · ~5–7 oktas
FEW020
Few · base 2,000 ft AGL · ~1–2 oktas
// Computed
CEILING8,000 ft AGL HIGHEST LAYER20,000 ft TOTAL COVERAGE~91% (overcast) FREEZING LEVEL8,009 ft VFR MARGIN+5,000 ft

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

12:24ZSUNRISE
20:15ZSOLAR NOON
04:06ZSUNSET
04:45ZCIVIL END
CURRENT15:01Z DAYLIGHT REMAINING13h 05m VFR NIGHT BEGINS04:45Z (13h 44m) DAY LENGTH15h 41m
Waning Crescent
ILLUMINATION11% MOONRISE09:50Z MOONSET01:32Z FULL MOON IN18 days

// Nearest reporting stations · 5 shown · 60 NM radius

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

© OpenStreetMap · CartoDB · OpenAIP
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