KGYY TAF

Terminal aerodrome forecast for Gary/Chicago International (GYY · KGYY), Gary/Chicago, IN. Issued 21 Sep 2026 0241Z, valid 0300Z to 0000Z, decoded period by period below. · Open on the map

All of Gary/Chicago International — runways, frequencies, charts and live weather

TAF issued 21 Sep 2026 0241Z

valid 0300Z to 0000Z

TAF KGYY 210241Z 2103/2124 05016G26KT 5SM -SHRA BR SCT006 OVC010 TEMPO 2103/2106 2SM -DZ BR BKN006 FM210600 07015G25KT P6SM VCSH SCT008 BKN015 OVC030 PROB30 2110/2116 6SM -SHRADZ BR SCT009 OVC015 FM211800 05012G20KT P6SM SCT020 BKN035

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

Period by period

Period (UTC)	Change	Wind	Vis	Ceiling	Sky	Cat
0300Z to 0600Z	Initial	050° at 16-26 kt	5 SM	1,000 ft OVC	Scattered at 600 ft AGL, Overcast at 1,000 ft AGL	MVFR
0300Z to 0600Z	TEMPO	Calm	2 SM	600 ft BKN	Broken at 600 ft AGL	IFR
0600Z to 1800Z	FM	070° at 15-25 kt	6+ SM	1,500 ft BKN	Scattered at 800 ft AGL, Broken at 1,500 ft AGL, Overcast at 3,000 ft AGL	MVFR
1000Z to 1600Z	PROB	Calm	6+ SM	1,500 ft OVC	Scattered at 900 ft AGL, Overcast at 1,500 ft AGL	MVFR
1800Z to 0000Z	FM	050° at 12-20 kt	6+ SM	3,500 ft BKN	Scattered at 2,000 ft AGL, Broken at 3,500 ft AGL	VFR

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

Frequently asked

What is the current TAF for KGYY?

The forecast issued 21 Sep 2026 0241Z for Gary/Chicago International reads: TAF KGYY 210241Z 2103/2124 05016G26KT 5SM -SHRA BR SCT006 OVC010 TEMPO 2103/2106 2SM -DZ BR BKN006 FM210600 07015G25KT P6SM VCSH SCT008 BKN015 OVC030 PROB30 2110/2116 6SM -SHRADZ BR SCT009 OVC015 FM211800 05012G20KT P6SM SCT020 BKN035

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 KGYY

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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