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// Station · 26m ago

KCPU

Calaveras Co Maury Rasmussen Field
CAT VFR
WIND CALM
VIS 10+ SM
CEILING CLR
T/Td 13°C / 2°C
ALTIM 29.94 inHg
ELEV 1,325 FT
38.1461°N / 120.6480°W
LOCATION · San Andreas, US
N
WIND
000°0 kt
KCPU · 1,325 FT
© OSM · CartoDB

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

METRIC
NOW · 03Z
+6H
+12H
+18H
WIND
CALM
 
 
 
VIS
10+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
—
 
 
 
T / Td
13 / 2
 
 
 
ALTIM
29.94"
 
 
 

// Interpretation

VFR with winds calm. 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 130355Z AUTO 00000KT 10SM CLR 13/02 A2994 RMK AO2 T01300020

KCPU · day 13 at 03:55 UTC · winds calm · visibility 10+ SM · temp 13°C / dewpoint 2°C · altimeter 29.94" Hg · automated station w/ precipitation discriminator

// Runway analysis · computed from current METAR wind

Wind CALM
ALL USABLE · WINDS CALM
N
WIND
000°calm
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
ALL RUNWAYS · CALM WINDS 2 ends
13 HDG 130° —CALM —— 3,602'
31 HDG 310° —CALM —— 3,602'
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 +1°C

1,400FT
+75 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS loading…
FIELD ELEV1,325 FT OAT+13°C ISA DELTA+1°C PRESSURE ALT1,302 FT
// Performance equivalent Operating here right now feels like operating at KRNM (Ramona Airport, Ramona, elev 1,395 ft) on a standard ISA day.
// Aircraft performance impact ENHANCED
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+14%
-10%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+10%
-6%
Light jetCJ4, Phenom 300, M2
+6%
-4%

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. Severity rating assumes a standard altimeter setting (29.92" Hg / 1013 hPa); a non-standard setting shifts the effective altitude by roughly 1,000 ft per 1" Hg of deviation.

// Cloud layers · clear · no layers reported

FT 0 5k 10k 15k 20k 25k FRZ LVL · 7,891 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 LEVEL7,891 ft VFR MARGINunlimited

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

14:09ZSUNRISE
19:50ZSOLAR NOON
01:30ZSUNSET
01:57ZCIVIL END
CURRENT04:21Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS01:57Z (past) DAY LENGTH11h 21m
Waxing Crescent
ILLUMINATION4% MOONRISE15:37Z MOONSET02:58Z FULL MOON IN13 days

// Nearest reporting stations

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

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