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// KNUC · San Clemente Island Naval Auxiliary Landing Field · San Clemente Island

// STALE Observation is 4h 28m old — METAR cadence is typically hourly. A fresh report may be on its way.

// Station · 4h 28m ago · STALE

KNUC

San Clemente Island Naval Auxiliary Landing Field
CAT VFR
WIND 250° / 6 kt
VIS 10+ SM
CEILING Few/scattered only
T/Td 30°C / 24.4°C
ALTIM 29.87 inHg
ELEV 184 FT
33.0227°N / 118.5880°W
LOCATION · San Clemente Island, US
N
WIND
250°6 kt
KNUC · 184 FT
© OSM · CartoDB

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

METRIC
NOW · 22Z
+6H
+12H
+18H
WIND
250°/6
 
 
 
VIS
10+ SM
 
 
 
CEILING
—
 
 
 
LAYERS
SCT250
 
 
 
T / Td
30 / 24
 
 
 
ALTIM
29.87"
 
 
 

Loading TAF forecast…

// Interpretation

VFR with light winds at 250°/6 kt. Visibility better than 10 statute miles and scattered at 25,000 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 KNUC 282256Z 25006KT 10SM SCT250 30/24 A2987 RMK SLPNO LAST T03000244

KNUC · day 28 at 22:56 UTC · wind from 250° at 6 kt · visibility 10+ SM · scattered layer at 25,000 ft · temp 30°C / dewpoint 24°C · altimeter 29.87" Hg

// Runway analysis · computed from current METAR wind

Wind 250° @ 6 kt
1 USABLE · 1 AVOID
N
WIND
250°6 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
HEADWIND ENDS 1 usable
24★ HDG 240° H6 kt X1 kt RIGHT PRIMARY · 9,301'
TAILWIND ENDS · AVOID 1 ends
06 HDG 060° T6 kt X1 kt LEFT —
Pattern altitude: 1,184 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 +15°C

2,100FT
+1,916 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS loading…
FIELD ELEV184 FT OAT+30°C ISA DELTA+15°C PRESSURE ALT231 FT
// Performance equivalent Operating here right now feels like operating at KO22 (Columbia Airport, Columbia, elev 2,118 ft) on a standard ISA day.
// Aircraft performance impact SIGNIFICANT
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+21%
-15%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+15%
-9%
Light jetCJ4, Phenom 300, M2
+8%
-6%

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

FT 0 5k 10k 15k 20k 25k FRZ LVL · 15,336 FT SCT250 KNUC ELEV · 184 FT
// Reported layers (highest → lowest)
SCT250
Scattered · base 25,000 ft AGL · ~3–4 oktas
// Computed
CEILING— HIGHEST LAYER25,000 ft TOTAL COVERAGE~40% (mixed) FREEZING LEVEL15,336 ft VFR MARGINunlimited

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

13:27ZSUNRISE
19:57ZSOLAR NOON
02:26ZSUNSET
02:51ZCIVIL END
CURRENT03:24Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS02:51Z (past) DAY LENGTH12h 58m
Waning Gibbous
ILLUMINATION99% MOONRISE02:19Z MOONSET15:17Z FULL MOON IN28 days

// Nearest reporting stations

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

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