// Station · 5m ago

MROC

Juan Santamaría International Airport

CAT MVFR

WIND 240° / 3 kt

VIS 3.1 SM

CEILING BKN at 1,200 ft

T/Td 22°C / 21°C

ALTIM 30.01 inHg

WX BR

ELEV 3,021 FT

9.9939°N / 84.2088°W

LOCATION · San José (Alajuela), CR

WIND

240°3 kt

MROC · 3,021 FT

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

METRIC

NOW · 01Z

+6H

+12H

+18H

WIND

240°/3

VIS

3.1 SM

CEILING

BKN012

LAYERS

SCT005 BKN012

T / Td

22 / 21

ALTIM

30.01"

// Interpretation

MVFR — ceiling 1,200 ft. Light winds at 240°/3 kt, visibility 3.1 SM, scattered at 500 ft, and broken at 1,200 ft. Reported weather: mist (BR). Mist is water droplets thinning visibility to between 5/8 and 6 SM — the moist, lighter cousin of fog. Would drop to IFR below 1,000 ft ceiling or 3 SM visibility, or rise back to VFR above 3,000 ft and 5 SM.

Loading TAF forecast narrative…

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

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// Raw observation METAR string + decoded

METAR MROC 130100Z 24003KT 5000 1500SW BR SCT005 BKN012 22/21 A3001 NOSIG

MROC · day 13 at 01:00 UTC · wind from 240° at 3 kt · visibility 3.1 SM · scattered layer at 500 ft · broken layer at 1,200 ft · temp 22°C / dewpoint 21°C · altimeter 30.01" Hg · weather: mist (BR)

// Runway analysis · computed from current METAR wind

Wind 240° @ 3 kt

ALL USABLE · WINDS CALM

WIND

240°3 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

07 HDG 070° —CALM —— 9,882'

25 HDG 250° —CALM —— 9,882'

Pattern altitude: 4,021 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 +13°C

4,500FT

+1,479 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV3,021 FT OAT+22°C ISA DELTA+13°C PRESSURE ALT2,930 FT

// Performance equivalent Your aircraft will perform as if it's at a field 4,500 ft high on a standard ISA day — that's +1,479 ft above MROC's actual elevation.

// Aircraft performance impact MODERATE

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+45%

-32%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+32%

-20%

Light jetCJ4, Phenom 300, M2

+18%

-14%

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 · 2 reported · highest to lowest

// Reported layers (highest → lowest)

BKN012

Broken · base 1,200 ft AGL · ~5–7 oktas

SCT005

Scattered · base 500 ft AGL · ~3–4 oktas

// Computed

CEILING1,200 ft AGL HIGHEST LAYER1,200 ft TOTAL COVERAGE~83% (mostly covered) FREEZING LEVEL14,132 ft VFR MARGIN-1,800 ft

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

11:26ZSUNRISE

17:24ZSOLAR NOON

23:22ZSUNSET

23:43ZCIVIL END

CURRENT01:05Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS23:43Z (past) DAY LENGTH11h 56m

Waxing Crescent

ILLUMINATION3% MOONRISE12:47Z MOONSET00:43Z FULL MOON IN13 days

// Nearest reporting stations

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

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