WxDecoder

KAPC/APC METAR & TAF Napa County Airport

Napa, CaliforniaElevation 35 ftSmall airport
CURRENT STATUS
VFRMore than 1 hour old
No ceiling, visibility 10 SM.
FLIGHT CATEGORY
VFR
ceiling & visibility
WIND
180@4
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
DENSITY ALT
-107 ft
-142 ft vs field
ACTIVE NWS ALERTS

Active weather alerts

Coastal Flood AdvisoryMinor · Expected · Likely
26 0336Z to 29 2200Z
San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
* WHAT...Up to 1.9ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Bay Shoreline locations of San Pablo Bay, San Francisco Bay, and Monterey Bay. * WHEN...Until 3 PM PDT Thursday. * IMPACTS...High tides will result in flooding of low-lying infrastructure, isolated road closures, and coastal erosion. Rising tides will bring water a…
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Alerts from the National Weather Service. For situational awareness only; always confirm against an official briefing.

CURRENT METAR

Decoded observation

Observed 0354Z (8:54 PM local) · More than 1 hour old

KAPC is currently VFR. Winds are from the south at 4 knots. Visibility is 10 statute miles. There is no ceiling.

WIND
180° at 4 kt
Steady.
VISIBILITY
10 statute miles
16.1 km, good.
CEILING & SKY
CLR
FEW and SCT layers are not ceilings.
TEMP / DEWPOINT
15°C / 11°C
59°F / 52°F. 4°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)
SLP175
sea-level pressure 1017.5 hPa
T01500111
precise temperature 15.0°C, dew point 11.1°C
TERMINAL AERODROME FORECAST

TAF timeline

Issued 2330Z (4:30 PM local) · valid to 0000Z (5:00 PM local)

KAPC forecast starts VFR at 00Z. Worst period is 11Z to 15Z with IFR possible (LOW CIG). Best period is 00Z to 05Z (VFR). Conditions are roughly steady over the period.

BKN25025,000 ft
VFR
IFR
VFR
VFR
0000Z5:00 PM0448Z9:48 PM0936Z2:36 AM1424Z7:24 AM1912Z12:12 PM0000Z5:00 PM

Codes in this report: P6SM BKN SKC TEMPO

Tap any group to decode it.

FAA: no delays reported at APC.

Source: FAA System Operations (ASWS). Operational status only; verify with official FAA sources and NOTAMs.

SUGGESTED RISK · TRAINING USE

Suggested risk level: Low

›Temporarily forecast: ceiling 800 ft AGL.

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

Extended forecast and pilot notes

Current aviation conditions show flight category VFR, wind from 180° at 4 kt, visibility 10 SM, ceiling none. Forecast suggests tonight patchy fog, low near 45F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Tonight Patchy Fog 45 SW 2 kt – 0%
Monday Sunny 66/42 W 10 kt – 0%
Tuesday Areas Of Fog then Mostly Sunny 65/42 W 6 kt – 0%
Wednesday Areas Of Fog then Mostly Sunny 65/42 WNW 5 kt – 0%
Thursday Areas Of Fog then Partly Sunny 62/40 W 6 kt – 2%
Friday Patchy Fog then Mostly Sunny 60/40 W 9 kt – 31%
Saturday Areas Of Fog then Chance Light Rain 58/40 W 4 kt – 31%
Sunday Patchy Fog 59 NW 4 kt – 23%

Source: National Weather Service (office MTR). Forecast issued 0457Z.

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
3 runways · crosswind ranking
ON-FIELD METAR
NESW01L19R01R19L0624 180°180°4 kt180°180° 4180°
READING THE BARB · SWIPE FOR MORE →
Calm
5 kt
10 kt
15 kt
20 kt
25 kt
30 kt
35 kt
40 kt
45 kt
50 kt
65 kt
75 kt
100 kt
105 kt
Half feather = 5 kt, full = 10 kt, filled pennant = 50 kt; add them up. The staff points the direction the wind blows from.
WIND USED
180° at 4 kt
Components computed from the current on-field METAR wind.
RECOMMENDED
RWY 19R4 kt headwind · 1 kt crosswind
RUNWAYS BY WIND · best end
19R
HEAD
4 kt
CROSS
1 kt L
BEST
19L
HEAD
4 kt
CROSS
1 kt L
OK
24
HEAD
1 kt
CROSS
4 kt L
OK
06
HEAD
1 kt tail
CROSS
4 kt R
OK
01L
HEAD
4 kt tail
CROSS
1 kt R
OK
01R
HEAD
4 kt tail
CROSS
1 kt R
OK
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 5,930 ft

01L/19R
Dimensions
5,930 x 150 ft
Surface
Asphalt (good)
Edge lights
MED
RWY 01L21°T
ILSILS/DME
Approach lightsMALS
Traffic patternLeft
RWY 19R201°T
VGSIPAPI (P4L)
Traffic patternRight
01R/19L
Dimensions
2,510 x 75 ft
Surface
Asphalt (good)
RWY 01R21°T
Traffic patternRight
RWY 19L201°T
Traffic patternLeft
06/24
Dimensions
5,008 x 150 ft
Surface
Concrete (good)
Edge lights
MED
RWY 0677°T
REILYes
Traffic patternLeft
RWY 24257°T
Traffic patternLeft

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
-107 ft
Pressure altitude
-115 ft
Field elevation
35 ft MSL
Temperature
15°C (59°F)
Dewpoint
11°C (52°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
0118Z 6:18 PM
Sunrise
1428Z 7:28 AM
Loggable night
0145Z (6:45 PM local) → 1401Z (7:01 AM local)
end of evening to start of morning civil twilight
Position lights required
0118Z (6:18 PM local) → 1428Z (7:28 AM local)
sunset to sunrise (91.209)
Night passenger currency
0218Z (7:18 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

Napa County Airport is in Napa, California. Field elevation 35 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPublicly owned
UseOpen to the public
TypeSmall airport
ManagerMARK WITSOE
Manager phone707-253-4300
AttendedDaily, 0700–2000
CHARTS & AIRSPACE
ICAO / IATAKAPC / APC
SectionalSAN FRANCISCO
Center (ARTCC)OAKLAND
Flight service (AFSS)OAKLAND
RegionCalifornia
CountryUnited States
Coordinates38.2132, -122.2810
Distance from city5 NM S
SERVICES & LIGHTING
Fuel100LL · Jet A
Control towerTowered
Field lightingSee remarks
BeaconSunset to sunrise · White-green (lighted land airport)
CTAF118.700
UNICOM122.950
FREQUENCIES

Communications

127.8
NORCAL APP/DEP
A/D
124.05
ATIS
ATIS
118.7
CTAF
CTAF
121.7
GND
GND
118.7
TWR
TWR
122.95
UNICOM
UNIC
122.950
UNICOM
UNICOM

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

AIRCRAFT ACTIVITY

KAPC traffic patterns

2026-06-12 to 2026-10-23, 70 days observed · data 2026-10-23

High confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
54.3
AVG OPS/DAY
88.1
Activity trend over 18 days: rising, from 65 to 71 operations per dayOperations trend (18 days)

Busiest day: Tue · Busiest month: Oct

FLEET MIX
Piston single 44%Unknown 35%Jet 11%Helicopter 4%Turboprop 3%Airliner 2%Twin 1%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›C172 (Piston single) · ~325 landings/mo
›UNKN (Unknown) · ~141 landings/mo
›CL35 (Jet) · ~15 landings/mo
›AS50 (Helicopter) · ~14 landings/mo
›C25B (Jet) · ~14 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly single-engine piston aircraft.

›C172 (Piston single)
›C82R (Unknown)
›AS50 (Helicopter)
›UNKN (Unknown)
›P28A (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

Current flight category at nearby reporting stations.

KDVO Marin County Airport - Gnoss Field
14 NM W
VFR
KSUU Travis Air Force Base
17 NM E
VFR
KCCR Buchanan Field
17 NM SE
VFR
KOAK Oakland San Francisco Bay Airport
30 NM S
VFR
KSTS Charles M. Schulz Sonoma County Airport
31 NM NW
VFR
KHWD Hayward Executive Airport
34 NM S
VFR
AIRPORT REMARKS

Operational remarks

›UNLGTD BRIDGE 1 NM S, 167 FT AGL
›ASPH APRONS STRENGTH 12500-30000 LBS GWT SINGLE WHEEL.
›FOR FUEL SVC 2100-0600 CALL 707-224-0887.
›WHEN ATCT CLSD ACTVT MALS RWY 01L; REIL RWY 06; MIRL RWYS 01L/19R & RWY 06/24 - CTAF. PAPI RWY 19R OPR CONSLY.
›LDG FEE CHRGD TO ALL AIR TAXI, COML ACFT OPNS (EXCLDG FLT INSTRUCTION), AND TSNT ACFT WEIGHING MORE THAN 12500 LBS.
›FOR CD WHEN ATCT CLSD CTC OAKLAND ARTCC AT 510-745-3380.
›DUE TO AIRPORT PROXIMITY TO WETLANDS BIRDS ON AND INVOF THE AIRPORT YEAR AROUND WITH HIGHEST CONCENTRATION OF ACTIVITY OF BIRDS ON THE RYS DURING RAINY WEATHER.
›ASPH TWYS STRENGTH 30,000 GWT SINGLE WHEEL.
OFFICIAL LINKS & SOURCES
↗Official METAR on AviationWeather.gov
↗Search NOTAMs (official FAA NOTAM Search)
↗Official airport website
↗Wikipedia
↗KAPC on OurAirports
FREQUENTLY ASKED
Does KAPC have a METAR?
Yes. KAPC has a current METAR observation, decoded into plain English on this page.
Does KAPC have a TAF?
Yes, a TAF is issued for KAPC; the decoded forecast timeline is shown above.
What is the field elevation at KAPC?
KAPC sits at 35 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for KAPC?
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.