Bert Mooney Airport to Bozeman Yellowstone International BTM → BZN
57 nautical miles (66 statute miles) east on a straight line, true course 100°, about 088° magnetic at the departure end (variation 12E). At 120 knots that is 24 min at the quickest height in today's winds (30,000 ft, a 20-knot tailwind), arriving about 8:24 am MDT (14:24 UTC). For planning, not a briefing: the legal preflight briefing comes from Flight Service (1-800-WX-BRIEF) or the FAA's own tools. Airlines fly this pair: 2 flights in the DOT's last twelve reported months, the route's page.
The route the straight line, the warnings crossed, restrictions, pilot reports and the airports along the way · click a mark for its words
Green, blue, red and purple airport dots are the flying conditions reported there now (VFR, marginal VFR, IFR, low IFR); grey means no report. Red areas are SIGMETs, orange areas AIRMETs, hatched red areas temporary flight restrictions. Map tiles: OpenFreeMap, data © OpenStreetMap contributors.
Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of
- AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the whole route.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the whole route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the whole route.
A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from BTM.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 UTC · at 120 knots true airspeed
The eastbound cruising heights for this course (VFR: odd thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 1 forecast point nearest it (DLN). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 7,500 ft | 190° at 10 kt | 0 | -4 °C | 120 kt | 28 min | 8:28 am MDT (14:28 UTC) |
| 9,500 ft | 200° at 12 kt | −2 kt | -4 °C | 122 kt | 28 min | 8:28 am MDT (14:28 UTC) |
| 11,500 ft | 220° at 21 kt | −9 kt | -4 °C | 129 kt | 27 min | 8:27 am MDT (14:27 UTC) |
| 13,500 ft | 220° at 22 kt | −10 kt | -8 °C | 130 kt | 26 min | 8:26 am MDT (14:26 UTC) |
| 15,500 ft | 210° at 22 kt | −9 kt | -12 °C | 129 kt | 27 min | 8:27 am MDT (14:27 UTC) |
| 17,500 ft | 210° at 21 kt | −7 kt | -17 °C | 127 kt | 27 min | 8:27 am MDT (14:27 UTC) |
| 18,000 ft FL180 | 210° at 21 kt | −7 kt | -18 °C | 127 kt | 27 min | 8:27 am MDT (14:27 UTC) |
| 24,000 ft FL240 | 210° at 43 kt | −14 kt | -28 °C | 134 kt | 26 min | 8:26 am MDT (14:26 UTC) |
| 30,000 ft FL300 | 210° at 60 kt | −20 kt | -33 °C | 140 kt | 24 min | 8:24 am MDT (14:24 UTC) |
| 34,000 ft FL340 | 210° at 72 kt | −24 kt | -37 °C | 144 kt | 24 min | 8:24 am MDT (14:24 UTC) |
| 39,000 ft FL390 | 210° at 67 kt | −23 kt | -44 °C | 143 kt | 24 min | 8:24 am MDT (14:24 UTC) |
Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 UTC; temperatures above 24,000 ft are below zero. Heights are above sea level; a height is left out when the forecast has no wind for it over most of the line (the ground is higher). Ground speed is the airspeed less the headwind; the time en route is for the straight line and ignores climb, descent and routing around weather.
The forecast points as issued
| Point | From | 3,000 | 6,000 | 9,000 | 12,000 | 18,000 | 24,000 | 30,000 | 34,000 | 39,000 |
|---|---|---|---|---|---|---|---|---|---|---|
| DLN | used from 0 nm out; 46 nm from the line | 190/10 -4° | 220/23 -4° | 210/21 -18° | 210/43 -28° | 210/60 -33° | 210/72 -37° | 210/67 -44° |
The weather now: both ends and the airports along the way public airports with a weather report within 25 nm of the line, one for each stretch
| Airport | Where | Conditions | Wind | Visibility | Ceiling | Elevation | Reported |
|---|---|---|---|---|---|---|---|
| BTM Butte, MT | departure | no report just now | 5,550 ft | ||||
| BZN Bozeman, MT | destination | no report just now | 4,473 ft |
The highest airport on this list sits at 5,550 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BZN when you get there the forecast at the estimated arrival, 8:24 am MDT (14:24 UTC)
BZN has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
No temporary flight restriction on or near this route right now.
Daylight
Sunset at BTM 6:47 pm MDT (00:47 UTC), at BZN 6:42 pm MDT (00:42 UTC) (civil twilight ends 7:12 pm MDT (01:12 UTC)).
Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.
Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads
Sources: the Aviation Weather Center's data service (SIGMETs, AIRMETs, graphical AIRMETs, pilot reports, winds and temperatures aloft, observations and terminal forecasts), the National Weather Service radar, the Weather Prediction Center's charts, the FAA's temporary flight restriction list and shapes, and the FAA's airport file for the positions, elevations and magnetic variation. Fetched when the page is viewed and kept a few minutes. Each leg is the straight line between its two airports; airways, terrain and airspace are not considered. The airports in detail: Bert Mooney Airport, Bozeman Yellowstone International.