Grand Junction Regional to Bozeman Yellowstone International GJT → BZN
416 nautical miles (479 statute miles) north on a straight line, true course 345°, about 336° magnetic at the departure end (variation 9E). At 120 knots that is 2 h 40 min at the quickest height in today's winds (34,000 ft, a 36-knot tailwind), arriving about 7:42 am MDT (13:42 UTC). Right now GJT is VFR, wind from the southeast (130°) at 15 knots, gusting to 24; BZN is marginal VFR, wind from the southwest (230°) at 3 knots. 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: 3 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 TANGO 1W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the first 50 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the first 376 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the first 159 nm of the route.
- AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the first 119 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the whole route.
- 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 last 119 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the last 30 nm of the 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 GJT.
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 westbound cruising heights for this course (VFR: even thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 4 forecast points nearest it (GJT, RKS, LND, 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 |
|---|---|---|---|---|---|---|
| 8,500 ft | 220° at 13 kt | −7 kt | 1 °C | 127 kt | 3 h 17 min | 8:19 am MDT (14:19 UTC) |
| 10,500 ft | 230° at 20 kt | −9 kt | 0 °C | 129 kt | 3 h 13 min | 8:15 am MDT (14:15 UTC) |
| 12,500 ft | 230° at 29 kt | −12 kt | -2 °C | 132 kt | 3 h 09 min | 8:11 am MDT (14:11 UTC) |
| 14,500 ft | 220° at 32 kt | −17 kt | -7 °C | 137 kt | 3 h 02 min | 8:04 am MDT (14:04 UTC) |
| 16,500 ft | 220° at 36 kt | −21 kt | -11 °C | 141 kt | 2 h 57 min | 7:59 am MDT (13:59 UTC) |
| 18,000 ft FL180 | 220° at 39 kt | −24 kt | -15 °C | 144 kt | 2 h 53 min | 7:55 am MDT (13:55 UTC) |
| 24,000 ft FL240 | 220° at 52 kt | −27 kt | -24 °C | 147 kt | 2 h 50 min | 7:52 am MDT (13:52 UTC) |
| 30,000 ft FL300 | 220° at 61 kt | −34 kt | -32 °C | 154 kt | 2 h 42 min | 7:44 am MDT (13:44 UTC) |
| 34,000 ft FL340 | 220° at 64 kt | −36 kt | -36 °C | 156 kt | 2 h 40 min | 7:42 am MDT (13:42 UTC) |
| 39,000 ft FL390 | 220° at 60 kt | −34 kt | -44 °C | 154 kt | 2 h 42 min | 7:44 am MDT (13:44 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| GJT | used from 0 nm out; 25 nm from the line | 220/26 6° | 230/39 0° | 220/55 -13° | 230/60 -23° | 230/78 -31° | 230/80 -35° | 230/74 -44° | ||
| RKS | used from 99 nm out; 30 nm from the line | 250/9 | 230/21 -1° | 210/43 -14° | 220/59 -23° | 220/55 -32° | 220/53 -35° | 220/48 -44° | ||
| LND | used from 198 nm out; 51 nm from the line | 240/10 3° | 240/30 0° | 220/42 -13° | 230/52 -23° | 220/54 -33° | 220/52 -36° | 220/53 -44° | ||
| DLN | used from 297 nm out; 105 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 |
|---|---|---|---|---|---|---|---|
| GJT Grand Junction, CO | departure | VFR Sky: overcast at 7,500 feet | from the southeast (130°) at 15 knots, gusting to 24 | 10+ mi | 7,500 ft | 4,861 ft | 4:53 am MDT (10:53 UTC) |
| VEL Vernal, UT | 89 nm out, 23 nm west of the line | VFR Sky: a broken layer at 3,300 feet, overcast at 4,200 feet | from the east (090°) at 4 knots | 10+ mi | 3,300 ft | 5,274 ft | 10:53 UTC |
| RKS Rock Springs, WY | 149 nm out, 16 nm east of the line | VFR Sky: overcast at 4,200 feet | from the southeast (140°) at 7 knots | 10+ mi | 4,200 ft | 6,764 ft | 10:54 UTC |
| PNA Pinedale, WY | 228 nm out, 4 nm east of the line | IFR Sky: overcast at 900 feet | from the southeast (130°) at 5 knots | 10+ mi | 900 ft | 7,096 ft | 10:55 UTC |
| JAC Jackson, WY | 287 nm out, 21 nm west of the line, tower | VFR Sky: scattered clouds at 11,000 feet | from the east-northeast (070°) at 3 knots | 10+ mi | none | 6,451 ft | 10:56 UTC |
| WYS West Yellowstone, MT | 357 nm out, 18 nm southwest of the line | IFR Sky: a broken layer at 500 feet, overcast at 1,000 feet Weather: mist, unknown precipitation | calm | 6 mi | 500 ft | 6,649 ft | 10:50 UTC |
| BZN Bozeman, MT | destination | marginal VFR Sky: a few clouds at 500 feet, scattered clouds at 1,000 feet, overcast at 2,400 feet | from the southwest (230°) at 3 knots | 10+ mi | 2,400 ft | 4,473 ft | 4:56 am MDT (10:56 UTC) |
The highest airport on this list sits at 7,096 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, 7:42 am MDT (13:42 UTC)
Wind light and variable, visibility 6 miles, mist, overcast at 300 feet low IFR
The whole forecast for BZN
- From Mon 4:00 am MDT (10:00 UTC): wind light and variable, visibility 6 miles, mist, overcast at 300 feet
- From Mon 10:00 am MDT (16:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 400 feet, overcast at 800 feet
- From Mon 2:00 pm MDT (20:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 800 feet, a broken layer at 1,500 feet
- From Mon 6:00 pm MDT (00:00 UTC): wind light and variable, visibility 6 miles, mist, scattered clouds at 800 feet, a broken layer at 2,000 feet
The forecast for GJT, the departure
- From Mon 12:00 am MDT (06:00 UTC): wind from the north at 8 knots, visibility more than 6 miles, showers nearby, scattered clouds at 7,000 feet, a broken layer at 10,000 feet
- From Mon 2:00 am MDT (08:00 UTC): wind from the south at 18 knots, gusting to 27, visibility more than 6 miles, scattered clouds at 3,500 feet, a broken layer at 7,000 feet
- 30% chance between Mon 2:00 am MDT (08:00 UTC) and 8:00 am MDT (14:00 UTC): visibility 4 miles, light rain showers, a broken layer at 3,500 feet
- From Mon 8:00 am MDT (14:00 UTC): wind from the south-southeast at 19 knots, gusting to 31, visibility more than 6 miles, scattered clouds at 4,500 feet, a broken layer at 7,000 feet
- 30% chance between Mon 8:00 am MDT (14:00 UTC) and 12:00 pm MDT (18:00 UTC): visibility 4 miles, light rain showers, a broken layer at 3,500 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind from the south-southwest at 16 knots, gusting to 24, visibility more than 6 miles, scattered clouds at 4,000 feet, a broken layer at 6,000 feet
- 30% chance between Mon 12:00 pm MDT (18:00 UTC) and 6:00 pm MDT (00:00 UTC): visibility 4 miles, light rain showers, a broken layer at 4,000 feet, a broken layer at 6,000 feet
- From Mon 6:00 pm MDT (00:00 UTC): wind from the west at 12 knots, gusting to 21, visibility more than 6 miles, a few clouds at 6,000 feet, scattered clouds at 8,000 feet
- 30% chance between Mon 6:00 pm MDT (00:00 UTC) and 12:00 am MDT (06:00 UTC): visibility 4 miles, light thunderstorms with rain, a broken layer at 6,000 feet (thunderheads)
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 GJT 6:38 pm MDT (00:38 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: Grand Junction Regional, Bozeman Yellowstone International.