KGYY TAF
Terminal aerodrome forecast for Gary/Chicago International Airport (GYY · KGYY), Gary, IN. Issued 6 Aug 2026 2356Z, valid 0000Z to 0000Z, decoded period by period below.
All of Gary/Chicago International Airport — runways, frequencies, charts and live weatherTAF issued 6 Aug 2026 2356Z
valid 0000Z to 0000ZTAF KGYY 062356Z 0700/0724 18006KT 6SM BR SCT015 BKN035 TEMPO 0700/0703 BKN015 FM070600 VRB04KT 5SM BR SCT015 BKN050 FM071200 22008KT P6SM SCT020 BKN050
Times are UTC (Zulu), as they appear in the bulletin.
Period by period
| Period (UTC) | Change | Wind | Vis | Ceiling | Sky | Cat |
|---|---|---|---|---|---|---|
| 0000Z to 0600Z | Initial | 180° at 6 kt | 6+ SM | 3,500 ft BKN | Scattered at 1,500 ft AGL, Broken at 3,500 ft AGL | VFR |
| 0000Z to 0300Z | TEMPO | Calm | n/a | 1,500 ft BKN | Broken at 1,500 ft AGL | MVFR |
| 0600Z to 1200Z | FM | Variable at 4 kt | 5 SM | 5,000 ft BKN | Scattered at 1,500 ft AGL, Broken at 5,000 ft AGL | MVFR |
| 1200Z to 0000Z | FM | 220° at 8 kt | 6+ SM | 5,000 ft BKN | Scattered at 2,000 ft AGL, Broken at 5,000 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
- 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.
Frequently asked
What is the current TAF for KGYY?
The forecast issued 6 Aug 2026 2356Z for Gary/Chicago International Airport reads: TAF KGYY 062356Z 0700/0724 18006KT 6SM BR SCT015 BKN035 TEMPO 0700/0703 BKN015 FM070600 VRB04KT 5SM BR SCT015 BKN050 FM071200 22008KT P6SM SCT020 BKN050
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.