// Station · 1d ago · STALE · HARD STALE

SBTC

Una-Comandatuba Airport

CAT VFR

WIND 270° / 3 kt

VIS 6+ SM

CEILING CLR

T/Td 21°C / 19°C

ALTIM 30.12 inHg

ELEV 23 FT

15.3544°S / 38.9987°W

LOCATION · Una, BR

WIND

270°3 kt

SBTC · 23 FT

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

METRIC

NOW · 23Z

+6H

+12H

+18H

WIND

270°/3

VIS

6+ SM

CEILING

CLR

LAYERS

—

T / Td

21 / 19

ALTIM

30.12"

// Interpretation

VFR with light winds at 270°/3 kt. Visibility 6+ SM 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 SBTC 232300Z 27003KT CAVOK 21/19 Q1020

SBTC · day 23 at 23:00 UTC · wind from 270° at 3 kt · visibility 6+ SM · temp 21°C / dewpoint 19°C · altimeter 30.12" Hg

// Runway analysis · computed from current METAR wind

Wind 270° @ 3 kt

ALL USABLE · WINDS CALM

WIND

270°3 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 2 ends

2 HDG 020° —CALM —— 6,234'

20 HDG 200° —CALM —— 6,234'

Pattern altitude: 1,023 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

500FT

+477 FT ABOVE FIELD ELEV

// DA · LAST 24 HOURS loading…

FIELD ELEV23 FT OAT+21°C ISA DELTA+6°C PRESSURE ALT-178 FT

// Performance equivalent Operating here right now feels like operating at SDIY (João Durval Carneiro Airport, Feira de Santana, elev 781 ft) on a standard ISA day.

// Aircraft performance impact MINOR

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+5%

-4%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+4%

-2%

Light jetCJ4, Phenom 300, M2

+2%

-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. 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

// Reported layers (highest → lowest)

CLR

No reported cloud layers — clear sky from surface to reporting ceiling.

// Computed

CEILING— HIGHEST LAYER— TOTAL COVERAGEclear FREEZING LEVEL10,629 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-3)

08:48ZSUNRISE

14:39ZSOLAR NOON

20:31ZSUNSET

20:52ZCIVIL END

CURRENT18:11Z DAYLIGHT REMAINING2h 19m VFR NIGHT BEGINS20:52Z (2h 41m) DAY LENGTH11h 43m

Waxing Gibbous

ILLUMINATION94% MOONRISE18:54Z MOONSET06:37Z 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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