WxDecoder

KNUC METAR & TAF San Clemente Island Naval Auxiliary Landing Field

San Clemente Island, CaliforniaElevation 184 ftSmall airport
CURRENT STATUS
VFRMore than 1 hour old
No ceiling, visibility 10 SM.
FLIGHT CATEGORY
VFR
ceiling & visibility
WIND
Calm
no steady wind
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
DENSITY ALT
552 ft
+368 ft vs field
CURRENT METAR

Decoded observation

Observed 1556Z (8:56 AM local) · More than 1 hour old

KNUC is currently VFR. Winds are calm. Visibility is 10 statute miles. There is no ceiling. The main issue is metar is 461 minutes old.

WIND
Calm
No steady wind.
VISIBILITY
10 statute miles
16.1 km, good.
CEILING & SKY
CLR
FEW and SCT layers are not ceilings.
TEMP / DEWPOINT
19°C / 18°C
66°F / 64°F. 1°C spread.
ALTIMETER
30.07 inHg
1018.3 hPa, above standard.
WEATHER & HAZARDS
No significant hazards
No precipitation or obscuration reported.

Codes in this report: AUTO CLR RMK AO2

Hover or tap any group for a plain-English explanation.

REMARKS: DECODED
AO2
automated station with a precipitation discriminator (can tell rain from snow)
SLP181
sea-level pressure 1018.1 hPa
T01940183
precise temperature 19.4°C, dew point 18.3°C
$
station needs maintenance
TERMINAL AERODROME FORECAST

TAF timeline

Issued 2154Z (2:54 PM local) · valid to 1500Z (8:00 AM local)

KNUC forecast starts VFR at 21Z. Worst period is 02Z to 04Z with MVFR possible. Best period is 21Z to 02Z (VFR). Overall the forecast deteriorates over the period.

  • Maximum temperature 21°C expected at 2300Z on day 22.
  • Minimum temperature 16°C expected at 1400Z on day 23.
VFR
BKN0242,400 ft · 5.6 SM
BKN0161,600 ft · 5 SM
2100Z2:00 PM0036Z5:36 PM0412Z9:12 PM0748Z12:48 AM1124Z4:24 AM1500Z8:00 AM

Codes in this report: COR 9999 FEW SCT BECMG BKN OVC

Tap any group to decode it.

SUGGESTED RISK · TRAINING USE

Suggested risk level: Low

›METAR is stale (461 minutes old).

A suggested risk level for training and situational awareness only, not a go/no-go authority. Verify with official sources and apply your personal minimums.

FORECAST & PILOT NOTES · SUPPLEMENTAL

Pilot weather notes

Current aviation conditions show flight category VFR, wind calm, visibility 10 SM, ceiling none. This report is older than usual, so treat it with caution. No extended National Weather Service forecast is available for this location. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

Radar

Radar data: NOAA/NWS MRMS composite reflectivity. For situational awareness only, not a substitute for an official weather briefing.

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RUNWAYS & WIND
1 runway · crosswind ranking
NESW0624CALMCALMCALMCALMCALM
WIND USED
Wind calm or variable
Crosswind ranking is unavailable until the wind has a steady direction.
Components are estimates from the current METAR wind and runway heading. Verify with the Chart Supplement and NOTAMs.
RUNWAYS

Runway detail & declared distances

3 runways · longest 9,301 ft

H2
Dimensions
70 x 70 ft
Surface
Concrete
RWY H2
06/24
Dimensions
9,301 x 200 ft
Surface
Concrete
Edge lights
HIGH
RWY 0667°T
RWY 24247°T
REILYes
H1
Dimensions
70 x 70 ft
Surface
Concrete
RWY H1

Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.

FIELD CONDITIONS

Performance & density altitude

Density altitude
552 ft
Pressure altitude
34 ft
Field elevation
184 ft MSL
Temperature
19°C (66°F)
Dewpoint
18°C (64°F)
Altimeter
30.07 inHg

Density altitude estimates how the aircraft performs versus standard atmosphere. Higher density altitude reduces climb performance and increases takeoff distance.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0110Z 6:10 PM
Sunrise
1407Z 7:07 AM
Loggable night
0135Z (6:35 PM local) → 1342Z (6:42 AM local)
end of evening to start of morning civil twilight
Position lights required
0110Z (6:10 PM local) → 1407Z (7:07 AM local)
sunset to sunrise (91.209)
Night passenger currency
0210Z (7:10 PM local) → 1307Z (6:07 AM local)
1 hr after sunset to 1 hr before sunrise (61.57(b))

FAA definitions, shown in Zulu with airport-local time. Verify for your operation.

AIRPORT INFORMATION

Facility & services

San Clemente Island Naval Auxiliary Landing Field is in San Clemente Island, California. Field elevation 184 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipNavy owned
UsePrivate use
TypeSmall airport
AttendedCLSD SAT, SUN AND HOL.
CHARTS & AIRSPACE
ICAO / IATAKNUC
SectionalLOS ANGELES
Center (ARTCC)LOS ANGELES
Flight service (AFSS)SAN DIEGO
RegionCalifornia
CountryUnited States
Coordinates33.0227, -118.5880
Distance from city0 NM NW
SERVICES & LIGHTING
Control towerTowered
Field lightingSee remarks
BeaconSunset to sunrise · Split white-green (military)
FREQUENCIES

Communications

120.85
BEAVER CON
A/G
26.86
ATIS
ATIS
119.55
GND
GND
126.75
TWR
TWR

Not all tower/ground/approach frequencies are in our datasets. Verify with the FAA Chart Supplement.

AIRCRAFT ACTIVITY

KNUC traffic patterns

2026-06-12 to 2026-10-22, 44 days observed · data 2026-10-23

Medium confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
3.5
AVG OPS/DAY
5.3
Activity trend over 10 days: falling, from 10 to 3 operations per dayOperations trend (10 days)

Busiest day: Thu · Busiest month: Aug

FLEET MIX
Helicopter 34%Unknown 22%Turboprop 20%Airliner 11%Twin 9%Jet 4%

Mostly rotorcraft.

TOP AIRCRAFT TYPES
›H60 (Helicopter) · ~7 landings/mo
›V22 (Helicopter) · ~7 landings/mo
›DHC6 (Turboprop) · ~5 landings/mo
›UNKN (Unknown) · ~4 landings/mo
›B350 (Turboprop) · ~3 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly rotorcraft.

›H60 (Helicopter)
›V22 (Helicopter)
›B350 (Turboprop)
›B06 (Helicopter)
›UNKN (Unknown)

This is an estimate based on repeated flight patterns, not registration data. Do not rely on it to identify specific aircraft or owners.

Data limitations (4)
›ADS-B coverage is incomplete; counts are an observed lower bound, not official totals.
›Some aircraft do not transmit usable ADS-B and are not counted.
›Aircraft types and based estimates are inferred and may be wrong.
›This is not official ATC, FAA, or airport data.
NEARBY AIRPORTS

Weather reference stations

Current flight category at nearby reporting stations.

KAVX Catalina Airport
25 NM N
VFR
KTOA Zamperini Field
48 NM N
VFR
KLGB Long Beach International Airport
52 NM NE
VFR
KSNA John Wayne Orange County International Airport
53 NM NE
VFR
KSLI Los Alamitos Army Air Field
53 NM NE
VFR
KHHR Jack Northrop Field Hawthorne Municipal Airport
56 NM N
VFR
AIRPORT REMARKS

Operational remarks

›FUEL - J5.
›JASU - 1(GTC-85) 1(A-4).
›AD HAS NSTD AIRFIELD SIGNAGE.
›FOR CALP INFO CTC AIRFIELD MGR 619-545-8261.
›CAUTION: EXTV MISL AND OFF-SHORE BOMBARDMENT IN VCNTY SAN CLEMENTE ISLAND. PERIMETER RD IN CLOSE PROXIMITY TO AIRFIELD, USE EXTREME CAUTION. HOLD SHORT MARKINGS LESS THAN 175 FT. EXPECT HOLD SHORT INSTRUCTIONS FROM TOWER.
›FLUID - SP.
›WHEN ATCT CLSD, FOR CD CTC LOS ANGELES ARTCC AT 661-575-2079.
›AVBL ONLY DRG HRS OF OPN. AFTER HRS FOR EMERG ACTVT HIRL RWY 06/24 5 STEP AND REIL RWY 24 1 STEP - 119.55.
›SIMULATED ACFT CARRIER DECK LGTS U/S.
›(FREDERICK SHERMAN FLD)
›PRKG RAMP DESIGNED FOR FIVE METROLINER SIZED ACFT (ON THE LINE ADJACENT TO THE TRML) AND EIGHT H-60 SIZED ACFT (ON THE NORTHERN TWO LINES - 4 EACH LINE). WHEN CARGO ACFT OCCUPY THE CENTER PRKG LINE (VIC OF SPOT 5) NONSTD TAXILANE CLNC MAY EXIST, USE CTN TAXING AROUND CARGO ACFT.
›STD PRKG APRON WO A PERIPHERAL TXL.
›RSTD - PPR FOR CIV ACFT AT ALL TIMES AND MIL OT, DSN 524-9240. REQ TO USE NUC AS BINGO FLD FOR CARRIER OPR RQR 7 DAYS PN AND SPECIAL AIR OPR AFTER NML OPR HR RQR 72 HR PN THRU SAN CLEMENTE ISLAND AIR OPS DSN 524-9240.
›OLS
›OTHER TIMES BY NOTAM.
›TFC PAT REDUCED RWY SEPARATION STD IN EFF USN/USMC ACFT (ONLY ALLOWED DURING CCAS).
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗Wikipedia
↗KNUC on OurAirports
FREQUENTLY ASKED
Does KNUC have a METAR?
Yes. KNUC has a current METAR observation, decoded into plain English on this page.
Does KNUC have a TAF?
Yes, a TAF is issued for KNUC; the decoded forecast timeline is shown above.
What is the field elevation at KNUC?
KNUC sits at 184 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for KNUC?
No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.
This app is for aviation weather education, training, and situational awareness only. It is not a substitute for an official weather briefing, approved flight-planning software, flight service, dispatch procedures, current FAA regulations, or pilot judgment. Always verify weather with official sources before flight.