KCPS TAF

Terminal aerodrome forecast for St Louis Downtown (CPS · KCPS), Cahokia/St Louis, IL. Issued 21 Sep 2026 0259Z, valid 0300Z to 0000Z, decoded period by period below. · Open on the map

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

TAF issued 21 Sep 2026 0259Z

valid 0300Z to 0000Z

TAF KCPS 210259Z 2103/2124 03010KT P6SM BKN050 TEMPO 2103/2105 3SM -TSRA OVC020CB FM210500 05010KT P6SM -SHRA VCTS OVC020CB TEMPO 2105/2108 3SM -SHRA OVC012 FM210800 04008KT 5SM BR OVC007 FM212100 02008KT 6SM BR OVC010

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

Period by period

Period (UTC)	Change	Wind	Vis	Ceiling	Sky	Cat
0300Z to 0500Z	Initial	030° at 10 kt	6+ SM	5,000 ft BKN	Broken at 5,000 ft AGL	VFR
0300Z to 0500Z	TEMPO	Calm	3 SM	2,000 ft OVC	Overcast at 2,000 ft AGL	MVFR
0500Z to 0800Z	FM	050° at 10 kt	6+ SM	2,000 ft OVC	Overcast at 2,000 ft AGL	MVFR
0500Z to 0800Z	TEMPO	Calm	3 SM	1,200 ft OVC	Overcast at 1,200 ft AGL	MVFR
0800Z to 2100Z	FM	040° at 8 kt	5 SM	700 ft OVC	Overcast at 700 ft AGL	IFR
2100Z to 0000Z	FM	020° at 8 kt	6+ SM	1,000 ft OVC	Overcast at 1,000 ft AGL	MVFR

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

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 KCPS?

The forecast issued 21 Sep 2026 0259Z for St Louis Downtown reads: TAF KCPS 210259Z 2103/2124 03010KT P6SM BKN050 TEMPO 2103/2105 3SM -TSRA OVC020CB FM210500 05010KT P6SM -SHRA VCTS OVC020CB TEMPO 2105/2108 3SM -SHRA OVC012 FM210800 04008KT 5SM BR OVC007 FM212100 02008KT 6SM BR OVC010

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 KCPS

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.

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