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// Station · 12m ago

KMTH

Florida Keys Marathon International Airport
CAT VFR
WIND 110° / 7 kt
VIS 10+ SM
CEILING CLR
T/Td 29.4°C / 24.4°C
ALTIM 30.14 inHg
ELEV 5 FT
24.7260°N / 81.0514°W
LOCATION · Marathon, US
N
WIND
110°7 kt
KMTH · 5 FT
© OSM · CartoDB

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

METRIC
NOW · 14Z
+6H
+12H
+18H
WIND
110°/7
 
 
 
VIS
10+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
 
 
 
T / Td
29 / 24
 
 
 
ALTIM
30.14"
 
 
 

// Interpretation

VFR with light winds at 110°/7 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 111453Z AUTO 11007KT 10SM CLR 29/24 A3014 RMK AO2 SLP205 T02940244 53018 $

KMTH · day 11 at 14:53 UTC · wind from 110° at 7 kt · visibility 10+ SM · temp 29°C / dewpoint 24°C · altimeter 30.14" Hg · automated station w/ precipitation discriminator · sea-level pressure 1020.5 mb

// Runway analysis · computed from current METAR wind

Wind 110° @ 7 kt
1 USABLE · 1 AVOID
N
WIND
110°7 kt
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
HEADWIND ENDS 1 usable
07 HDG 070° H5 kt X4 kt RIGHT PRIMARY · 5,008'
TAILWIND ENDS · AVOID 1 ends
25 HDG 250° T5 kt X4 kt LEFT
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 +14°C

1,500FT
+1,495 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↘ -300 FT
2,100 1,300 500
24h AGO18h12h6hNOW
FIELD ELEV5 FT OAT+29°C ISA DELTA+14°C PRESSURE ALT-216 FT
// Performance equivalent Operating here right now feels like operating at K49A (Gilmer County Airport, Ellijay, elev 1,486 ft) on a standard ISA day.
// Aircraft performance impact MINOR
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+15%
-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.

// Cloud layers · clear · no layers reported

FT 0 5k 10k 15k 20k 25k FRZ LVL · 14,853 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 LEVEL14,853 ft VFR MARGINunlimited

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

10:43ZSUNRISE
17:30ZSOLAR NOON
00:17ZSUNSET
00:43ZCIVIL END
CURRENT15:05Z DAYLIGHT REMAINING9h 12m VFR NIGHT BEGINS00:43Z (9h 37m) DAY LENGTH13h 34m
Waning Crescent
ILLUMINATION11% MOONRISE08:09Z MOONSET21:43Z FULL MOON IN18 days

// Nearest reporting stations · 3 shown · 60 NM radius

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

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