KTTD TAF
Terminal aerodrome forecast for Portland-Troutdale (TTD · KTTD), Portland, OR. Issued 20 Sep 2026 2335Z, valid 0000Z to 0000Z, decoded period by period below. · Open on the map
All of Portland-Troutdale — runways, frequencies, charts and live weatherTAF issued 20 Sep 2026 2335Z
valid 0000Z to 0000ZTAF KTTD 202335Z 2100/2124 VRB04KT P6SM SKC FM211200 VRB02KT P6SM OVC025 FM211900 27004KT P6SM SCT250
Times are UTC (Zulu), as they appear in the bulletin.
Period by period
| Period (UTC) | Change | Wind | Vis | Ceiling | Sky | Cat |
|---|---|---|---|---|---|---|
| 0000Z to 1200Z | Initial | Variable at 4 kt | 6+ SM | Clear | Clear below 12,000 ft | VFR |
| 1200Z to 1900Z | FM | Variable at 2 kt | 6+ SM | 2,500 ft OVC | Overcast at 2,500 ft AGL | MVFR |
| 1900Z to 0000Z | FM | 270° at 4 kt | 6+ SM | Clear | Scattered at 25,000 ft AGL | VFR |
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 KTTD?
The forecast issued 20 Sep 2026 2335Z for Portland-Troutdale reads: TAF KTTD 202335Z 2100/2124 VRB04KT P6SM SKC FM211200 VRB02KT P6SM OVC025 FM211900 27004KT P6SM SCT250
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 KTTD
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Something here wrong or out of date?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.