// Station · 5m ago

KMTH

Florida Keys Marathon International Airport

CAT VFR

WIND 120° / 11 kt

VIS 10+ SM

CEILING Few/scattered only

T/Td 28.3°C / 24.4°C

ALTIM 30.03 inHg

ELEV 5 FT

24.7260°N / 81.0514°W

LOCATION · Marathon, US

WIND

120°11 kt

KMTH · 5 FT

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

METRIC

NOW · 12Z

+6H

+12H

+18H

WIND

120°/11

VIS

10+ SM

CEILING

—

LAYERS

FEW021

T / Td

28 / 24

ALTIM

30.03"

// Interpretation

VFR with moderate winds at 120°/11 kt. Visibility better than 10 statute miles and a few at 2,100 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 KMTH 271253Z AUTO 12011KT 10SM FEW021 28/24 A3003 RMK AO2 RAB14E26 SLP168 P0001 T02830244 $

KMTH · day 27 at 12:53 UTC · wind from 120° at 11 kt · visibility 10+ SM · a few clouds at 2,100 ft · temp 28°C / dewpoint 24°C · altimeter 30.03" Hg · automated station w/ precipitation discriminator · sea-level pressure 1016.8 mb

// Runway analysis · computed from current METAR wind

Wind 120° @ 11 kt

1 USABLE · 1 AVOID · 1 CAUTION

WIND

120°11 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

HEADWIND ENDS 1 usable

07★ HDG 070° H7 kt X8 kt RIGHT PRIMARY · 5,008'

TAILWIND ENDS · AVOID 1 ends

25 HDG 250° T7 kt X8 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 +13°C

1,500FT

+1,495 FT ABOVE FIELD ELEV

FIELD ELEV5 FT OAT+28°C ISA DELTA+13°C PRESSURE ALT-107 FT

// Performance equivalent Operating here right now feels like operating at KTRI (Tri-Cities Regional TN/VA Airport, Blountville, elev 1,519 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 · 1 reported · highest to lowest

// Reported layers (highest → lowest)

FEW021

Few · base 2,100 ft AGL · ~1–2 oktas

// Computed

CEILING— HIGHEST LAYER2,100 ft TOTAL COVERAGE~15% (sparse) FREEZING LEVEL14,298 ft VFR MARGINunlimited

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

10:37ZSUNRISE

17:22ZSOLAR NOON

00:08ZSUNSET

00:33ZCIVIL END

CURRENT12:58Z DAYLIGHT REMAINING11h 09m VFR NIGHT BEGINS00:33Z (11h 35m) DAY LENGTH13h 30m

Waxing Gibbous

ILLUMINATION83% MOONRISE19:24Z MOONSET08:55Z FULL MOON IN4 days

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

KNQX

VFR

Naval Air Station Key West/Boca Chica Field · Key West

WIND: 150° / 12 kt
VIS: 10+ SM
CEILING: SCT018
DIST: 36 NM W
AGE: 5m ago

KEYW

VFR

Key West International Airport · Key West

WIND: 130° / 14 kt
VIS: 9.0 SM
CEILING: FEW018
DIST: 40 NM W
AGE: 5m ago

KHST

VFR

Homestead Air Reserve Base · Homestead

WIND: 100° / 11 ktG17
VIS: 10+ SM
CEILING: BKN250
DIST: 58 NM NE
AGE: 14m ago

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

AIRSPACE

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