KTCM TAF
Terminal aerodrome forecast for McChord Air Force Base (TCM · KTCM), Tacoma, WA. Issued 6 Aug 2026 2100Z, valid 2100Z to 0300Z, decoded period by period below.
All of McChord Air Force Base — runways, frequencies, charts and live weatherTAF issued 6 Aug 2026 2100Z
valid 2100Z to 0300ZTAF KTCM 062100Z 0621/0803 36005KT 9000 HZ SKC QNH2990INS BECMG 0709/0710 25005KT 9000 HZ SKC QNH3003INS BECMG 0722/0723 27006KT 9000 HZ SKC QNH3003INS TX30/0700Z TN13/0712Z
Times are UTC (Zulu), as they appear in the bulletin.
Period by period
| Period (UTC) | Change | Wind | Vis | Ceiling | Sky | Cat |
|---|---|---|---|---|---|---|
| 2100Z to 0900Z | Initial | 360° at 5 kt | 5.59 SM | Clear | Clear below 12,000 ft | VFR |
| 0900Z to 2200Z | BECMG | 250° at 5 kt | 5.59 SM | Clear | Clear below 12,000 ft | VFR |
| 2200Z to 0300Z | BECMG | 270° at 6 kt | 5.59 SM | Clear | Clear below 12,000 ft | VFR |
What the change groups mean
- BECMG
- Becoming — a gradual change over the stated window.
What the categories mean
- VFR
- Visual flight rules — ceiling above 3,000 ft and visibility greater than 5 SM.
Frequently asked
What is the current TAF for KTCM?
The forecast issued 6 Aug 2026 2100Z for McChord Air Force Base reads: TAF KTCM 062100Z 0621/0803 36005KT 9000 HZ SKC QNH2990INS BECMG 0709/0710 25005KT 9000 HZ SKC QNH3003INS BECMG 0722/0723 27006KT 9000 HZ SKC QNH3003INS TX30/0700Z TN13/0712Z
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 KTCM
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.