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// CYSP · Marathon Airport · Marathon

// STALE Observation is 4h 5m old — METAR cadence is typically hourly. A fresh report may be on its way.

// Station · 4h 5m ago · STALE

CYSP

Marathon Airport
CAT IFR
WIND 070° / 16 kt G25
VIS 4.0 SM
CEILING OVC at 900 ft
T/Td 4°C / 3°C
ALTIM 29.94 inHg
WX -RA BR
ELEV 1,035 FT
48.7553°N / 86.3444°W
LOCATION · Marathon, CA
N
WIND
070°16 kt
CYSP · 1,035 FT
© OSM · CartoDB

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

METRIC
NOW · 21Z
+6H
+12H
+18H
WIND
070°/16G25
 
 
 
VIS
4.0 SM
 
 
 
CEILING
OVC009
 
 
 
LAYERS
OVC009
 
 
 
T / Td
4 / 3
 
 
 
ALTIM
29.94"
 
 
 

Loading TAF forecast…

// Interpretation

IFR conditions — ceiling 900 ft. Brisk winds at 070°/16 kt, gusting 25, visibility 4.0 SM, overcast at 900 ft. Reported weather: light rain and mist (-RA BR). Mist is water droplets thinning visibility to between 5/8 and 6 SM — the moist, lighter cousin of fog. Would deteriorate to LIFR below 500 ft ceiling or 1 SM, or improve to MVFR above 1,000 ft and 3 SM.

Loading TAF forecast narrative…

SOURCES · NOAA Aviation Weather Center METAR (TAF loading…)

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// Raw observation METAR string + decoded

METAR CYSP 122100Z 07016G25KT 4SM -RA BR OVC009 04/03 A2994 RMK SC8 LAST STFD OBS/NEXT 131200Z SLP154

CYSP · day 12 at 21:00 UTC · wind from 070° at 16 kt, gusts to 25 kt · visibility 4.0 SM · overcast at 900 ft · temp 4°C / dewpoint 3°C · altimeter 29.94" Hg · weather: light rain and mist (-RA BR) · sea-level pressure 1015.4 mb

// Runway analysis · computed from current METAR wind

Wind 070° @ 16 ktG25
2 USABLE · 0 AVOID · 2 CAUTION
N
WIND
070°16G25 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
HEADWIND ENDS 2 usable
16★ HDG 160° H0 kt X16 kt LEFT PRIMARY · 3,933'
34 HDG 340° H0 kt X16 kt RIGHT ⚠ HIGH XW · 64%
Pattern altitude: 2,035 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 -9°C

-100FT
-1,135 FT BELOW FIELD ELEV
// DA · LAST 24 HOURS loading…
FIELD ELEV1,035 FT OAT+4°C ISA DELTA-9°C PRESSURE ALT1,012 FT
// Performance equivalent Operating here right now feels like operating at CYMO (Moosonee Airport, Moosonee, elev 30 ft) on a standard ISA day.
// Aircraft performance impact ENHANCED
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+0%
-0%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+0%
-0%
Light jetCJ4, Phenom 300, M2
+0%
-0%

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 · 1 reported · highest to lowest

FT 0 5k 10k 15k 20k 25k FRZ LVL · 3,055 FT OVC009 · CEILING CYSP ELEV · 1,035 FT
// Reported layers (highest → lowest)
OVC009
Overcast · base 900 ft AGL · 8 oktas
// Computed
CEILING900 ft AGL HIGHEST LAYER900 ft TOTAL COVERAGE~100% (overcast) FREEZING LEVEL3,055 ft VFR MARGIN-2,100 ft

// Sun & Moon · times in Z · bar = local day (UTC-6)

12:02ZSUNRISE
17:33ZSOLAR NOON
23:03ZSUNSET
23:35ZCIVIL END
CURRENT01:05Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS23:35Z (past) DAY LENGTH11h 01m
Waxing Crescent
ILLUMINATION3% MOONRISE13:23Z MOONSET00:24Z FULL MOON IN13 days

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

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