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// KMTH · Florida Keys Marathon International Airport · Marathon

// Station · 23m ago

KMTH

Florida Keys Marathon International Airport
CAT VFR
WIND VRB / 3 kt
VIS 10+ SM
CEILING CLR
T/Td 30°C / 25°C
ALTIM 30.05 inHg
ELEV 5 FT
24.7260°N / 81.0514°W
LOCATION · Marathon, US
N
WIND
VRB3 kt
KMTH · 5 FT
© OSM · CartoDB

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

METRIC
NOW · 15Z
+6H
+12H
+18H
WIND
VRB/3
 
 
 
VIS
10+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
—
 
 
 
T / Td
30 / 25
 
 
 
ALTIM
30.05"
 
 
 

Loading TAF forecast…

// Interpretation

VFR with light winds at variable/3 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 KMTH 251553Z AUTO VRB03KT 10SM CLR 30/25 A3005 RMK AO2 SLP176 T03000250

KMTH · day 25 at 15:53 UTC · wind variable at 3 kt · visibility 10+ SM · temp 30°C / dewpoint 25°C · altimeter 30.05" Hg · automated station w/ precipitation discriminator · sea-level pressure 1017.6 mb

// Runway analysis · computed from current METAR wind

Wind VRB @ 3 kt
ALL USABLE · WINDS CALM
N
WIND
VRB3 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
ALL RUNWAYS · CALM WINDS 2 ends
07 HDG 070° —CALM —— 5,008'
25 HDG 250° —CALM —— 5,008'
Pattern altitude: 1,005 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 +15°C

1,600FT
+1,595 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS loading…
FIELD ELEV5 FT OAT+30°C ISA DELTA+15°C PRESSURE ALT-128 FT
// Performance equivalent Operating here right now feels like operating at KJZP (Pickens County Airport, Jasper, elev 1,535 ft) on a standard ISA day.
// Aircraft performance impact MODERATE
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+16%
-11%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+11%
-7%
Light jetCJ4, Phenom 300, M2
+6%
-5%

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 · 15,157 FT KMTH ELEV · 5 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING— HIGHEST LAYER— TOTAL COVERAGEclear FREEZING LEVEL15,157 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-5)

11:04ZSUNRISE
17:27ZSOLAR NOON
23:51ZSUNSET
00:15ZCIVIL END
CURRENT16:16Z DAYLIGHT REMAINING7h 35m VFR NIGHT BEGINS00:15Z (7h 58m) DAY LENGTH12h 47m
Waxing Gibbous
ILLUMINATION94% MOONRISE21:06Z MOONSET09:54Z FULL MOON IN2 days

// Nearest reporting stations

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

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