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// Station · 7m ago

KMTN

Martin State Airport
CAT LIFR
WIND CALM
VIS 0.25 SM
CEILING OVC at 200 ft
T/Td 21°C / 20°C
ALTIM 29.99 inHg
WX FG
ELEV 21 FT
39.3257°N / 76.4138°W
LOCATION · Baltimore, US
N
WIND
000°0 kt
KMTN · 21 FT
© OSM · CartoDB

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

METRIC
NOW · 11Z
+6H
+12H
+18H
WIND
CALM
 
 
 
VIS
0.25 SM
 
 
 
CEILING
OVC002
 
 
 
LAYERS
OVC002
 
 
 
T / Td
21 / 20
 
 
 
ALTIM
29.99"
 
 
 

// Interpretation

LIFR — ceiling 200 ft. Winds calm, visibility 0.25 SM, overcast at 200 ft. Reported weather: FG. Reported weather: FG. LIFR is the lowest standard category. Would improve to IFR above 500 ft and 1 SM.

Loading TAF forecast narrative…

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

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// Raw observation METAR string + decoded

METAR KMTN 271146Z 00000KT 1/4SM FG OVC002 21/20 A2999

KMTN · day 27 at 11:46 UTC · winds calm · visibility 0.25 SM · overcast at 200 ft · temp 21°C / dewpoint 20°C · altimeter 29.99" Hg · weather: FG

// Runway analysis · computed from current METAR wind

Wind CALM
ALL USABLE · WINDS CALM
N
WIND
000°calm
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
ALL RUNWAYS · CALM WINDS 2 ends
15 HDG 150° CALM 6,999'
33 HDG 330° CALM 6,999'
Pattern altitude: 1,021 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 +6°C

700FT
+679 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS ↗ +400 FT
1,000 600 200
24h AGO18h12h6hNOW
FIELD ELEV21 FT OAT+21°C ISA DELTA+6°C PRESSURE ALT-53 FT
// Performance equivalent Operating here right now feels like operating at KHGR (Hagerstown Regional Richard A Henson Field, Hagerstown, elev 703 ft) on a standard ISA day.
// Aircraft performance impact MINOR
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+7%
-5%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+5%
-3%
Light jetCJ4, Phenom 300, M2
+3%
-2%

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

FT 0 5k 10k 15k 20k 25k FRZ LVL · 10,627 FT OVC002 · CEILING KMTN ELEV · 21 FT
// Reported layers (highest → lowest)
OVC002
Overcast · base 200 ft AGL · 8 oktas
// Computed
CEILING200 ft AGL HIGHEST LAYER200 ft TOTAL COVERAGE~100% (overcast) FREEZING LEVEL10,627 ft VFR MARGIN-2,800 ft

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

09:44ZSUNRISE
17:04ZSOLAR NOON
00:23ZSUNSET
00:54ZCIVIL END
CURRENT11:53Z DAYLIGHT REMAINING12h 29m VFR NIGHT BEGINS00:54Z (13h 01m) DAY LENGTH14h 38m
Waxing Gibbous
ILLUMINATION83% MOONRISE18:29Z MOONSET09:08Z FULL MOON IN4 days

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

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

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