KACK TAF
Terminal aerodrome forecast for Nantucket Memorial Airport (ACK · KACK), Nantucket, MA. Issued 6 Aug 2026 2320Z, valid 0000Z to 0000Z, decoded period by period below.
All of Nantucket Memorial Airport — runways, frequencies, charts and live weatherTAF issued 6 Aug 2026 2320Z
valid 0000Z to 0000ZTAF KACK 062320Z 0700/0724 23011KT 5SM BR OVC002 FM070100 23011KT 3SM BR BKN003 FM070500 24010KT 1SM BR BKN003 FM071300 25010KT P6SM FEW008 BKN015 FM071600 23011KT P6SM SCT015
Times are UTC (Zulu), as they appear in the bulletin.
Period by period
| Period (UTC) | Change | Wind | Vis | Ceiling | Sky | Cat |
|---|---|---|---|---|---|---|
| 0000Z to 0100Z | Initial | 230° at 11 kt | 5 SM | 200 ft OVC | Overcast at 200 ft AGL | LIFR |
| 0100Z to 0500Z | FM | 230° at 11 kt | 3 SM | 300 ft BKN | Broken at 300 ft AGL | LIFR |
| 0500Z to 1300Z | FM | 240° at 10 kt | 1 SM | 300 ft BKN | Broken at 300 ft AGL | LIFR |
| 1300Z to 1600Z | FM | 250° at 10 kt | 6+ SM | 1,500 ft BKN | Few at 800 ft AGL, Broken at 1,500 ft AGL | MVFR |
| 1600Z to 0000Z | FM | 230° at 11 kt | 6+ SM | Clear | Scattered at 1,500 ft AGL | VFR |
What the change groups mean
- FM
- From — a rapid, permanent change to the conditions that follow.
What the categories mean
- LIFR
- Low IFR — ceiling below 500 ft and/or visibility less than 1 SM.
- MVFR
- Marginal VFR — ceiling 1,000 to 3,000 ft and/or visibility 3 to 5 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 6 Aug 2026 2320Z for Nantucket Memorial Airport reads: TAF KACK 062320Z 0700/0724 23011KT 5SM BR OVC002 FM070100 23011KT 3SM BR BKN003 FM070500 24010KT 1SM BR BKN003 FM071300 25010KT P6SM FEW008 BKN015 FM071600 23011KT P6SM SCT015
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.