// Station · 11m ago

KACK

Nantucket Memorial Airport

CAT VFR

WIND 280° / 4 kt

VIS 9.0 SM

CEILING CLR

T/Td 12.8°C / 12.2°C

ALTIM 29.80 inHg

ELEV 47 FT

41.2531°N / 70.0602°W

LOCATION · Nantucket, US

WIND

280°4 kt

KACK · 47 FT

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

METRIC

NOW · 00Z

+6H

+12H

+18H

WIND

280°/4

VIS

9.0 SM

CEILING

CLR

LAYERS

—

T / Td

13 / 12

ALTIM

29.80"

// Interpretation

VFR with light winds at 280°/4 kt. Visibility 9.0 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 KACK 130053Z 28004KT 9SM CLR 13/12 A2980 RMK AO2 SLP091 T01280122

KACK · day 13 at 00:53 UTC · wind from 280° at 4 kt · visibility 9.0 SM · temp 13°C / dewpoint 12°C · altimeter 29.80" Hg · automated station w/ precipitation discriminator · sea-level pressure 1009.1 mb

// Runway analysis · computed from current METAR wind

Wind 280° @ 4 kt

ALL USABLE · WINDS CALM

WIND

280°4 kt

HEADWIND CAUTION · HIGH XW AVOID · TAILWIND

ALL RUNWAYS · CALM WINDS 4 ends

06 HDG 060° —CALM —— 6,303'

24 HDG 240° —CALM —— 6,303'

15 HDG 150° —CALM —— 4,500'

33 HDG 330° —CALM —— 4,500'

Pattern altitude: 1,047 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 -2°C

-100FT

-147 FT BELOW FIELD ELEV

// DA · LAST 24 HOURS ↗ +0 FT

24h AGO18h12h6hNOW

FIELD ELEV47 FT OAT+13°C ISA DELTA-2°C PRESSURE ALT165 FT

// Performance equivalent Operating here right now feels like operating at KPVC (Provincetown Municipal Airport, Provincetown, elev 9 ft) on a standard ISA day.

// Aircraft performance impact ENHANCED

TAKEOFF ROLL CLIMB RATE

Single-engine propC172, PA-28, Cherokee

+0%

-0%

Turbo / high-perf pistonSR22T, Bonanza, Mooney

+0%

-0%

Light jetCJ4, Phenom 300, M2

+0%

-0%

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 LEVEL6,512 ft VFR MARGINunlimited

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

10:49ZSUNRISE

16:27ZSOLAR NOON

22:06ZSUNSET

22:33ZCIVIL END

CURRENT01:04Z DAYLIGHT REMAINING0m VFR NIGHT BEGINS22:33Z (past) DAY LENGTH11h 16m

Waxing Crescent

ILLUMINATION3% MOONRISE12:10Z MOONSET23:27Z FULL MOON IN13 days

// Nearest reporting stations

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

AIRSPACE

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