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// Station · 21m ago

KCPU

Calaveras Co Maury Rasmussen Field
CAT VFR
WIND 340° / 8 kt
VIS 10+ SM
CEILING CLR
T/Td 23.3°C / 9.3°C
ALTIM 30.09 inHg
ELEV 1,325 FT
38.1461°N / 120.6480°W
LOCATION · San Andreas, US
N
WIND
340°8 kt
KCPU · 1,325 FT
© OSM · CartoDB

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

METRIC
NOW · 20Z
+6H
+12H
+18H
WIND
340°/8
 
 
 
VIS
10+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
 
 
 
T / Td
23 / 9
 
 
 
ALTIM
30.09"
 
 
 

// Interpretation

VFR with moderate winds at 340°/8 kt. Visibility better than 10 statute miles and no reported cloud layers. 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 KCPU 302035Z AUTO 34008KT 310V020 10SM CLR 23/09 A3009 RMK AO2 T02330093

KCPU · day 30 at 20:35 UTC · wind from 340° at 8 kt · visibility 10+ SM · temp 23°C / dewpoint 9°C · altimeter 30.09" Hg · automated station w/ precipitation discriminator

// Runway analysis · computed from current METAR wind

Wind 340° @ 8 kt
1 USABLE · 1 AVOID
N
WIND
340°8 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
HEADWIND ENDS 1 usable
31 HDG 310° H7 kt X4 kt RIGHT PRIMARY · 3,602'
TAILWIND ENDS · AVOID 1 ends
13 HDG 130° T7 kt X4 kt LEFT
Pattern altitude: 2,325 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 +11°C

2,400FT
+1,075 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↗ +700 FT
2,700 1,550 400
24h AGO18h12h6hNOW
FIELD ELEV1,325 FT OAT+23°C ISA DELTA+11°C PRESSURE ALT1,154 FT
// Performance equivalent Operating here right now feels like operating at KO86 (Trinity Center Airport, Trinity Center, elev 2,390 ft) on a standard ISA day.
// Aircraft performance impact MINOR
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+24%
-17%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+17%
-11%
Light jetCJ4, Phenom 300, M2
+10%
-7%

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 · clear · no layers reported

FT 0 5k 10k 15k 20k 25k FRZ LVL · 13,093 FT KCPU ELEV · 1,325 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING HIGHEST LAYER TOTAL COVERAGEclear FREEZING LEVEL13,093 ft VFR MARGINunlimited

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

12:43ZSUNRISE
20:01ZSOLAR NOON
03:19ZSUNSET
03:50ZCIVIL END
CURRENT20:56Z DAYLIGHT REMAINING6h 23m VFR NIGHT BEGINS03:50Z (6h 54m) DAY LENGTH14h 36m
Full Moon
ILLUMINATION100% MOONRISE00:13Z MOONSET14:49Z FULL MOON IN1 day

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

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

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