// Station · 5m ago

KAPC

Napa County Airport

CAT VFR

WIND 210° / 9 kt

VIS 10+ SM

CEILING Few/scattered only

T/Td 20°C / 13.3°C

ALTIM 30.09 inHg

ELEV 35 FT

38.2132°N / 122.2810°W

LOCATION · Napa, US

WIND

210°9 kt

KAPC · 35 FT

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

METRIC

NOW · 20Z

+6H

+12H

+18H

WIND

210°/9

VIS

10+ SM

CEILING

—

LAYERS

FEW050

T / Td

20 / 13

ALTIM

30.09"

// Interpretation

VFR with moderate winds at 210°/9 kt. Visibility better than 10 statute miles and a few at 5,000 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 KAPC 302054Z 21009KT 10SM FEW050 20/13 A3009 RMK AO2 SLP182 T02000133 57014

KAPC · day 30 at 20:54 UTC · wind from 210° at 9 kt · visibility 10+ SM · a few clouds at 5,000 ft · temp 20°C / dewpoint 13°C · altimeter 30.09" Hg · automated station w/ precipitation discriminator · sea-level pressure 1018.2 mb

// Runway analysis · computed from current METAR wind

Wind 210° @ 9 kt

3 USABLE · 3 AVOID

WIND

210°9 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 3 usable

19R★ HDG 190° H8 kt X3 kt RIGHT PRIMARY · 5,930'

19L HDG 190° H8 kt X3 kt RIGHT 2,510'

24 HDG 240° H8 kt X4 kt LEFT 5,008'

TAILWIND ENDS · AVOID 3 ends

01L HDG 010° T8 kt X3 kt LEFT —

01R HDG 010° T8 kt X3 kt LEFT —

6 HDG 060° T8 kt X4 kt RIGHT —

Pattern altitude: 1,035 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 +5°C

400FT

+365 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS ↗ +0 FT

24h AGO18h12h6hNOW

FIELD ELEV35 FT OAT+20°C ISA DELTA+5°C PRESSURE ALT-136 FT

// Performance equivalent Operating here right now feels like operating at KLVK (Livermore Municipal Airport, Livermore, elev 400 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 · 1 reported · highest to lowest

// Reported layers (highest → lowest)

FEW050

Few · base 5,000 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER5,000 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL10,136 ft VFR MARGINunlimited

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

12:49ZSUNRISE

20:08ZSOLAR NOON

03:26ZSUNSET

03:57ZCIVIL END

CURRENT20:59Z DAYLIGHT REMAINING6h 27m VFR NIGHT BEGINS03:57Z (6h 58m) DAY LENGTH14h 36m

Full Moon

ILLUMINATION100% MOONRISE00:19Z MOONSET14:56Z FULL MOON IN1 day

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

KDVO

VFR

Marin County Airport - Gnoss Field · Novato

WIND: 140° / 6 kt
VIS: 10+ SM
CEILING: CLR
DIST: 14 NM W
AGE: 24m ago

KO69

VFR

Petaluma Municipal Airport · Petaluma

WIND: CALM
VIS: 10+ SM
CEILING: CLR
DIST: 16 NM W
AGE: 4m ago

KSUU

VFR

Travis Air Force Base · Fairfield

WIND: 220° / 8 ktG16
VIS: 10+ SM
CEILING: FEW210
DIST: 17 NM E
AGE: 1h 4m ago

KCCR

VFR

Buchanan Field · Concord

WIND: 310° / 11 kt
VIS: 10+ SM
CEILING: CLR
DIST: 17 NM SE
AGE: 6m ago

KVCB

VFR

Nut Tree Airport · Vacaville

WIND: 170° / 8 kt
VIS: 10+ SM
CEILING: CLR
DIST: 18 NM NE
AGE: 6m ago

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

AIRSPACE

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