KBTM TAF
Terminal aerodrome forecast for Bert Mooney Airport (BTM · KBTM), Butte, MT. Issued 7 Aug 2026 0102Z, valid 0100Z to 0000Z, decoded period by period below.
All of Bert Mooney Airport — runways, frequencies, charts and live weatherTAF issued 7 Aug 2026 0102Z
valid 0100Z to 0000ZTAF KBTM 070102Z 0701/0724 32010G15KT P6SM SKC FM070300 15004KT 6SM FU SKC FM071300 VRB02KT 5SM FU SKC FM071800 30007G17KT P6SM SKC FM072100 31014G24KT P6SM SCT120
Times are UTC (Zulu), as they appear in the bulletin.
Period by period
| Period (UTC) | Change | Wind | Vis | Ceiling | Sky | Cat |
|---|---|---|---|---|---|---|
| 0100Z to 0300Z | Initial | 320° at 10-15 kt | 6+ SM | Clear | Clear below 12,000 ft | VFR |
| 0300Z to 1300Z | FM | 150° at 4 kt | 6+ SM | Clear | Clear below 12,000 ft | VFR |
| 1300Z to 1800Z | FM | Variable at 2 kt | 5 SM | Clear | Clear below 12,000 ft | MVFR |
| 1800Z to 2100Z | FM | 300° at 7-17 kt | 6+ SM | Clear | Clear below 12,000 ft | VFR |
| 2100Z to 0000Z | FM | 310° at 14-24 kt | 6+ SM | Clear | Scattered at 12,000 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 KBTM?
The forecast issued 7 Aug 2026 0102Z for Bert Mooney Airport reads: TAF KBTM 070102Z 0701/0724 32010G15KT P6SM SKC FM070300 15004KT 6SM FU SKC FM071300 VRB02KT 5SM FU SKC FM071800 30007G17KT P6SM SKC FM072100 31014G24KT P6SM SCT120
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 KBTM
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.