WxDecoder

CN12 Weather Williams Gliderport

Williams, CaliforniaElevation 68 ftSmall airport
OFF-FIELD REFERENCE
Nearest report: KMYV · 26 NM E · More than 1 hour old
No ceiling, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KMYV
WIND
VRB@4
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

No aviation METAR is published for this airport. The nearest National Weather Service station reports wind from 297° at 3 kt. This observation is older than usual, so treat it with extra caution. Treat this as supplemental, not an aviation observation. Forecast suggests sunday haze then mostly sunny, high near 69F, low near 44F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Sunday Haze then Mostly Sunny 69/44 NNE 5 kt – 0%
Monday Sunny 66/42 ENE 3 kt – 0%
Tuesday Sunny 67/44 N 4 kt – 0%
Wednesday Mostly Sunny 64/44 NNE 3 kt – 2%
Thursday Mostly Sunny 62/41 NNE 3 kt – 8%
Friday Slight Chance Light Rain 61/39 N 4 kt – 20%
Saturday Slight Chance Light Rain 60 NNW 4 kt – 20%

Source: National Weather Service (office STO). Forecast issued 0944Z.

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
Crosswind calculator
No runway layout is available for CN12. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 2,500 ft

16/34
Dimensions
2,500 x 40 ft
Surface
Asphalt
RWY 16
Traffic patternRight
RWY 34
Traffic patternRight

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

FIELD CONDITIONS

Field elevation

Field elevation
68 ft MSL

Density and pressure altitude need a current temperature and altimeter from the METAR.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0117Z 6:17 PM
Sunrise
1428Z 7:28 AM
Loggable night
0144Z (6:44 PM local) → 1401Z (7:01 AM local)
end of evening to start of morning civil twilight
Position lights required
0117Z (6:17 PM local) → 1428Z (7:28 AM local)
sunset to sunrise (91.209)
Night passenger currency
0217Z (7:17 PM local) → 1328Z (6:28 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

Williams Gliderport is in Williams, California. Field elevation 68 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeSmall airport
ManagerBRETT R. MAYES
Manager phone530-473-5600
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATACN12
SectionalSAN FRANCISCO
Center (ARTCC)OAKLAND
Flight service (AFSS)RANCHO MURIETA
RegionCalifornia
CountryUnited States
Coordinates39.1635, -122.1320
Distance from city1 NM NE
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

CN12 traffic patterns

2026-06-14 to 2026-10-21, 44 days observed · data 2026-10-23

Medium confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
1.1
AVG OPS/DAY
1.8
Activity trend over 13 days: flat, from 2 to 2 operations per dayOperations trend (13 days)

Busiest day: Fri · Busiest month: Aug

FLEET MIX
Helicopter 50%Other 21%Piston single 17%Turboprop 12%

Mostly rotorcraft.

TOP AIRCRAFT TYPES
›AS50 (Helicopter) · ~8 landings/mo
›PA25 (Piston single) · ~3 landings/mo
›AS31 (Other) · ~3 landings/mo
›A32P (Other) · ~1 landings/mo
›A660 (Turboprop) · ~1 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

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

›AS50 (Helicopter)
›PA25 (Piston single)

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

CN12 has no on-field report. Nearest reporting station: KMYV (26 NM E, VFR).

KMYV Yuba County Airport
26 NM E
VFR
KOVE Oroville Municipal Airport
31 NM NE
VFR
KBAB Beale Air Force Base
32 NM E
VFR
KSMF Sacramento International Airport
38 NM SE
VFR
KCIC Chico Regional Airport
40 NM N
VFR
KMCC McClellan Airfield
45 NM SE
VFR
AIRPORT REMARKS

Operational remarks

›FOR CD CTC OAKLAND ARTCC AT 510-745-3380.
›RWY/APRON - POOR; UNPAVED PORTION - POOR/SOFT WHEN WET.
›ESTAB PRIOR TO 15 MAY 1959.
›ADD'L CONTACT NOELLE MAYES, 530-330-4354, NOELLE@WILLIAMSSOARING.COM
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗CN12 on OurAirports
FREQUENTLY ASKED
Does CN12 have a METAR?
No on-field METAR is issued for CN12. This page uses the nearest reporting station as a reference.
Does CN12 have a TAF?
No TAF is issued directly for CN12. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at CN12?
CN12 sits at 68 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for CN12?
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.