KACK TAF

Terminal aerodrome forecast for Nantucket Memorial (ACK · KACK), Nantucket, MA. Issued 20 Sep 2026 2336Z, valid 0000Z to 0000Z, decoded period by period below. · Open on the map

All of Nantucket Memorial — runways, frequencies, charts and live weather

TAF issued 20 Sep 2026 2336Z

valid 0000Z to 0000Z

TAF KACK 202336Z 2100/2124 13008KT 5SM -RA OVC025 FM210200 12008KT 4SM -RA BR SCT006 OVC015 FM210800 35007KT 2SM -RA BR OVC003 FM211500 04017G25KT P6SM BKN012 FM211900 04017G25KT P6SM BKN070

Times are UTC (Zulu), as they appear in the bulletin.

Period by period

Period (UTC)	Change	Wind	Vis	Ceiling	Sky	Cat
0000Z to 0200Z	Initial	130° at 8 kt	5 SM	2,500 ft OVC	Overcast at 2,500 ft AGL	MVFR
0200Z to 0800Z	FM	120° at 8 kt	4 SM	1,500 ft OVC	Scattered at 600 ft AGL, Overcast at 1,500 ft AGL	MVFR
0800Z to 1500Z	FM	350° at 7 kt	2 SM	300 ft OVC	Overcast at 300 ft AGL	LIFR
1500Z to 1900Z	FM	040° at 17-25 kt	6+ SM	1,200 ft BKN	Broken at 1,200 ft AGL	MVFR
1900Z to 0000Z	FM	040° at 17-25 kt	6+ SM	7,000 ft BKN	Broken at 7,000 ft AGL	VFR

What the change groups mean

FM: From — a rapid, permanent change to the conditions that follow.

What the categories mean

MVFR: Marginal VFR — ceiling 1,000 to 3,000 ft and/or visibility 3 to 5 SM.
LIFR: Low IFR — ceiling below 500 ft and/or visibility less than 1 SM.
VFR: Visual flight rules — ceiling above 3,000 ft and visibility greater than 5 SM.

Frequently asked

What is the current TAF for KACK?

The forecast issued 20 Sep 2026 2336Z for Nantucket Memorial reads: TAF KACK 202336Z 2100/2124 13008KT 5SM -RA OVC025 FM210200 12008KT 4SM -RA BR SCT006 OVC015 FM210800 35007KT 2SM -RA BR OVC003 FM211500 04017G25KT P6SM BKN012 FM211900 04017G25KT P6SM BKN070

How far ahead does a TAF forecast?

A TAF covers a 24-hour period at most airports and 30 hours at larger ones, issued four times a day at 0000Z, 0600Z, 1200Z and 1800Z. It describes conditions within roughly 5 statute miles of the airport, not the surrounding area.

What do FM, BECMG and TEMPO mean?

FM (from) marks a rapid, permanent change at the stated time. BECMG (becoming) marks a gradual change over the stated window. TEMPO marks conditions expected for less than half the period, in spells of under an hour each. PROB30 and PROB40 give the probability of the conditions that follow.

More about KACK

Forecasts from the US National Weather Service Aviation Weather Center. Times are UTC (Zulu). For planning and education only — always confirm with an official preflight briefing.

Something here wrong or out of date? Report a data problem.