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// Station · 10m ago

CYDC

Princeton Airport
CAT VFR
WIND 250° / 7 kt G15
VIS 10+ SM
CEILING Few/scattered only
T/Td 34°C / 2°C
ALTIM 29.99 inHg
ELEV 2,298 FT
49.4681°N / 120.5110°W
LOCATION · Town of Princeton, CA
N
WIND
250°7 kt
CYDC · 2,298 FT
© OSM · CartoDB

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

METRIC
NOW · 22Z
+6H
+12H
+18H
WIND
250°/7G15
 
 
 
VIS
10+ SM
 
 
 
CEILING
 
 
 
LAYERS
FEW060 FEW067 FEW260
 
 
 
T / Td
34 / 2
 
 
 
ALTIM
29.99"
 
 
 

// Interpretation

VFR with light winds at 250°/7 kt, gusting 15. Visibility better than 10 statute miles and a few at 6,000 ft, a few at 6,700 ft, and a few at 26,000 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 CYDC 142200Z 25007G15KT 25SM FEW060 FEW067 FEW260 34/02 A2999 RMK CF1CU1CI1 CF TR CU TR CI TR FU ALOFT/HZ SLP139 DENSITY ALT 4900FT

CYDC · day 14 at 22:00 UTC · wind from 250° at 7 kt, gusts to 15 kt · visibility 10+ SM · a few clouds at 6,000 ft · a few clouds at 6,700 ft · a few clouds at 26,000 ft · temp 34°C / dewpoint 2°C · altimeter 29.99" Hg · sea-level pressure 1013.9 mb

// Runway analysis · computed from current METAR wind

Wind 250° @ 7 ktG15
1 USABLE · 1 AVOID
N
WIND
250°7G15 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
HEADWIND ENDS 1 usable
22 HDG 220° H6 kt X3 kt RIGHT PRIMARY · 3,932'
TAILWIND ENDS · AVOID 1 ends
04 HDG 040° T6 kt X4 kt LEFT
Pattern altitude: 3,298 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 +23°C

5,000FT
+2,702 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↗ +600 FT
5,500 3,350 1,200
24h AGO18h12h6hNOW
FIELD ELEV2,298 FT OAT+34°C ISA DELTA+23°C PRESSURE ALT2,224 FT
// Performance equivalent Your aircraft will perform as if it's at a field 5,000 ft high on a standard ISA day — that's +2,702 ft above CYDC's actual elevation.
// Aircraft performance impact SIGNIFICANT
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+50%
-35%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+35%
-23%
Light jetCJ4, Phenom 300, M2
+20%
-15%

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 · 3 reported · highest to lowest

FT 0 5k 10k 15k 20k 25k FRZ LVL · 19,470 FT FEW060 FEW067 FEW260 CYDC ELEV · 2,298 FT
// Reported layers (highest → lowest)
FEW260
Few · base 26,000 ft AGL · ~1–2 oktas
FEW067
Few · base 6,700 ft AGL · ~1–2 oktas
FEW060
Few · base 6,000 ft AGL · ~1–2 oktas
// Computed
CEILING HIGHEST LAYER26,000 ft TOTAL COVERAGE~31% (mixed) FREEZING LEVEL19,470 ft VFR MARGINunlimited

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

12:12ZSUNRISE
20:08ZSOLAR NOON
04:05ZSUNSET
04:47ZCIVIL END
CURRENT22:10Z DAYLIGHT REMAINING5h 55m VFR NIGHT BEGINS04:47Z (6h 36m) DAY LENGTH15h 53m
New Moon
ILLUMINATION0% MOONRISE12:18Z MOONSET04:12Z FULL MOON IN15 days

// Nearest reporting stations · 5 shown · 100 NM (sparse area)

// Area map · 80 NM radius · CartoDB Dark Matter + aeronautical overlay

© OpenStreetMap · CartoDB · OpenAIP
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