KSTL TAF

Terminal aerodrome forecast for St Louis Lambert International (STL · KSTL), St Louis, MO. Issued 21 Sep 2026 0721Z, valid 0700Z to 1200Z, decoded period by period below. · Open on the map

All of St Louis Lambert International — runways, frequencies, charts and live weather

TAF issued 21 Sep 2026 0721Z

valid 0700Z to 1200Z

TAF KSTL 210721Z 2107/2212 VRB04KT P6SM -SHRA SCT004 BKN050 FM210900 05006KT P6SM OVC010 FM211000 04005KT 2SM BR OVC005 FM211600 02006KT 5SM BR OVC008 FM212200 03006KT P6SM OVC015

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

Period by period

Period (UTC)	Change	Wind	Vis	Ceiling	Sky	Cat
0700Z to 0900Z	Initial	Variable at 4 kt	6+ SM	5,000 ft BKN	Scattered at 400 ft AGL, Broken at 5,000 ft AGL	VFR
0900Z to 1000Z	FM	050° at 6 kt	6+ SM	1,000 ft OVC	Overcast at 1,000 ft AGL	MVFR
1000Z to 1600Z	FM	040° at 5 kt	2 SM	500 ft OVC	Overcast at 500 ft AGL	IFR
1600Z to 2200Z	FM	020° at 6 kt	5 SM	800 ft OVC	Overcast at 800 ft AGL	IFR
2200Z to 1200Z	FM	030° at 6 kt	6+ SM	1,500 ft OVC	Overcast at 1,500 ft AGL	MVFR

What the change groups mean

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

What the categories mean

VFR: Visual flight rules — ceiling above 3,000 ft and visibility greater than 5 SM.
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 KSTL?

The forecast issued 21 Sep 2026 0721Z for St Louis Lambert International reads: TAF KSTL 210721Z 2107/2212 VRB04KT P6SM -SHRA SCT004 BKN050 FM210900 05006KT P6SM OVC010 FM211000 04005KT 2SM BR OVC005 FM211600 02006KT 5SM BR OVC008 FM212200 03006KT P6SM OVC015

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 KSTL

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.