KHAF TAF

Terminal aerodrome forecast for Half Moon Bay (HAF · KHAF), Half Moon Bay, CA. Issued 21 Sep 2026 0520Z, valid 0600Z to 0600Z, decoded period by period below. · Open on the map

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TAF issued 21 Sep 2026 0520Z

valid 0600Z to 0600Z

TAF KHAF 210520Z 2106/2206 29005KT 5SM BR OVC010 TEMPO 2107/2111 2SM -DZ BR OVC007 FM211100 29004KT 2SM -DZ BR OVC007 FM211900 25007KT 5SM BR OVC010 FM220100 25005KT 4SM BR OVC009

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

Period by period

Period (UTC)	Change	Wind	Vis	Ceiling	Sky	Cat
0600Z to 1100Z	Initial	290° at 5 kt	5 SM	1,000 ft OVC	Overcast at 1,000 ft AGL	MVFR
0700Z to 1100Z	TEMPO	Calm	2 SM	700 ft OVC	Overcast at 700 ft AGL	IFR
1100Z to 1900Z	FM	290° at 4 kt	2 SM	700 ft OVC	Overcast at 700 ft AGL	IFR
1900Z to 0100Z	FM	250° at 7 kt	5 SM	1,000 ft OVC	Overcast at 1,000 ft AGL	MVFR
0100Z to 0600Z	FM	250° at 5 kt	4 SM	900 ft OVC	Overcast at 900 ft AGL	IFR

What the change groups mean

TEMPO: Temporary — expected for less than half the period, in spells under an hour.
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.
IFR: Instrument flight rules — ceiling 500 to 999 ft and/or visibility 1 to less than 3 SM.

Frequently asked

What is the current TAF for KHAF?

The forecast issued 21 Sep 2026 0520Z for Half Moon Bay reads: TAF KHAF 210520Z 2106/2206 29005KT 5SM BR OVC010 TEMPO 2107/2111 2SM -DZ BR OVC007 FM211100 29004KT 2SM -DZ BR OVC007 FM211900 25007KT 5SM BR OVC010 FM220100 25005KT 4SM BR OVC009

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 KHAF

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Something here wrong or out of date?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.