KTYS TAF
Terminal aerodrome forecast for Mc Ghee Tyson (TYS · KTYS), Knoxville, TN. Issued 20 Sep 2026 2339Z, valid 0000Z to 0000Z, decoded period by period below. · Open on the map
All of Mc Ghee Tyson — runways, frequencies, charts and live weatherTAF issued 20 Sep 2026 2339Z
valid 0000Z to 0000ZTAF KTYS 202339Z 2100/2124 VRB03KT P6SM SCT250 FM211400 22004KT P6SM SCT050 SCT250 PROB30 2118/2124 5SM -SHRA BKN050
Times are UTC (Zulu), as they appear in the bulletin.
Period by period
| Period (UTC) | Change | Wind | Vis | Ceiling | Sky | Cat |
|---|---|---|---|---|---|---|
| 0000Z to 1400Z | Initial | Variable at 3 kt | 6+ SM | Clear | Scattered at 25,000 ft AGL | VFR |
| 1400Z to 0000Z | FM | 220° at 4 kt | 6+ SM | Clear | Scattered at 5,000 ft AGL, Scattered at 25,000 ft AGL | VFR |
| 1800Z to 0000Z | PROB | Calm | 5 SM | 5,000 ft BKN | Broken at 5,000 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.
Frequently asked
What is the current TAF for KTYS?
The forecast issued 20 Sep 2026 2339Z for Mc Ghee Tyson reads: TAF KTYS 202339Z 2100/2124 VRB03KT P6SM SCT250 FM211400 22004KT P6SM SCT050 SCT250 PROB30 2118/2124 5SM -SHRA 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 KTYS
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Something here wrong or out of date?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.