Snow Lake Seaplane Base to Bozeman Yellowstone International IN2 → BZN
1,153 nautical miles (1,327 statute miles) west on a straight line, true course 291°. At 120 knots that is 10 h 29 min at the quickest height in today's winds (4,500 ft, a 10-knot headwind), arriving about 7:34 pm MDT (01:34 UTC), after sunset at the destination. Right now BZN is low IFR, wind from the south (170°) at 6 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: 1 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 last 726 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 994 to 1054 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 139 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the last 89 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 IN2.
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 14:00–21:00 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 13 forecast points nearest it (FWA, MKG, JOT, DBQ, LSE, MCW, FSD, ABR, PIR, RAP, MLS, BIL, 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 |
|---|---|---|---|---|---|---|
| 4,500 ft | 250° at 12 kt | +10 kt | 4 °C | 110 kt | 10 h 29 min | 7:34 pm MDT (01:34 UTC) |
| 6,500 ft | 250° at 15 kt | +11 kt | 12 °C | 109 kt | 10 h 35 min | 7:40 pm MDT (01:40 UTC) |
| 8,500 ft | 250° at 19 kt | +15 kt | 10 °C | 105 kt | 10 h 59 min | 8:04 pm MDT (02:04 UTC) |
| 10,500 ft | 250° at 22 kt | +18 kt | 5 °C | 102 kt | 11 h 18 min | 8:23 pm MDT (02:23 UTC) |
| 12,500 ft | 250° at 24 kt | +21 kt | 2 °C | 99 kt | 11 h 39 min | 8:44 pm MDT (02:44 UTC) |
| 14,500 ft | 250° at 26 kt | +22 kt | -3 °C | 98 kt | 11 h 46 min | 8:51 pm MDT (02:51 UTC) |
| 16,500 ft | 250° at 28 kt | +23 kt | -7 °C | 97 kt | 11 h 53 min | 8:58 pm MDT (02:58 UTC) |
| 18,000 ft FL180 | 240° at 29 kt | +24 kt | -11 °C | 96 kt | 12 h 01 min | 9:06 pm MDT (03:06 UTC) |
| 24,000 ft FL240 | 240° at 37 kt | +29 kt | -23 °C | 91 kt | 12 h 40 min | 9:45 pm MDT (03:45 UTC) |
| 30,000 ft FL300 | 250° at 44 kt | +37 kt | -34 °C | 83 kt | 13 h 53 min | 10:58 pm MDT (04:58 UTC) |
| 34,000 ft FL340 | 250° at 47 kt | +43 kt | -38 °C | 77 kt | 14 h 58 min | 12:03 am MDT (06:03 UTC) |
| 39,000 ft FL390 | 260° at 52 kt | +48 kt | -45 °C | 72 kt | 16 h 01 min | 1:06 am MDT (07:06 UTC) |
Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| FWA | used from 0 nm out; 56 nm from the line | 250/18 | 260/22 15° | 260/27 7° | 290/26 6° | 290/28 -8° | 290/39 -20° | 280/36 -37° | 290/54 -39° | 310/60 -48° |
| MKG | used from 50 nm out; 62 nm from the line | 240/27 | 240/26 15° | 270/27 9° | 280/27 5° | 280/28 -9° | 280/32 -22° | 270/41 -38° | 290/44 -41° | 300/60 -48° |
| JOT | used from 99 nm out; 60 nm from the line | 230/30 | 250/26 16° | 270/27 11° | 280/34 5° | 290/32 -8° | 280/37 -21° | 280/40 -36° | 290/46 -37° | 290/56 -47° |
| DBQ | used from 199 nm out; 53 nm from the line | 250/26 | 240/32 19° | 250/35 11° | 260/37 5° | 270/35 -9° | 270/40 -21° | 270/43 -35° | 280/49 -37° | 280/58 -46° |
| LSE | used from 248 nm out; 43 nm from the line | 240/16 | 230/27 20° | 250/35 12° | 260/28 5° | 260/30 -9° | 260/37 -21° | 260/38 -36° | 280/44 -37° | 280/52 -47° |
| MCW | used from 348 nm out; 34 nm from the line | 220/19 | 210/29 20° | 230/35 13° | 250/35 5° | 250/33 -9° | 260/44 -21° | 260/46 -33° | 270/58 -37° | 270/59 -46° |
| FSD | used from 447 nm out; 71 nm from the line | 260/9 | 210/16 18° | 220/27 14° | 230/28 6° | 240/39 -9° | 240/48 -22° | 260/52 -32° | 260/61 -38° | 260/60 -46° |
| ABR | used from 596 nm out; 49 nm from the line | 020/9 | 230/5 12° | 190/14 11° | 200/25 5° | 230/37 -11° | 230/50 -23° | 240/39 -34° | 240/49 -38° | 240/55 -46° |
| PIR | used from 646 nm out; 33 nm from the line | 300/15 10° | 270/10 10° | 220/18 4° | 220/36 -11° | 230/43 -21° | 240/48 -33° | 240/51 -37° | 240/55 -44° | |
| RAP | used from 745 nm out; 75 nm from the line | 310/18 6° | 270/15 6° | 260/20 2° | 240/28 -11° | 240/42 -23° | 240/47 -35° | 230/47 -36° | 240/56 -44° | |
| MLS | used from 845 nm out; 89 nm from the line | 320/9 -2° | 270/14 0° | 260/22 -1° | 220/30 -14° | 210/43 -26° | 230/53 -34° | 230/54 -38° | 230/59 -44° | |
| BIL | used from 994 nm out; 27 nm from the line | L/V | 250/11 -1° | 240/20 -2° | 230/28 -15° | 220/28 -28° | 220/53 -34° | 220/55 -39° | 220/63 -44° | |
| DLN | used from 1143 nm out; 71 nm from the line | L/V -3° | 170/16 -6° | 180/21 -18° | 190/27 -30° | 210/63 -33° | 210/62 -36° | 210/51 -42° |
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 |
|---|---|---|---|---|---|---|---|
| IN2 Jamestown, IN | departure | no report just now | 965 ft | ||||
| EKM Elkhart, IN | 40 nm out, 16 nm southwest of the line, tower | VFR | from the southwest (220°) at 4 knots | 10+ mi | none | 777 ft | 14:55 UTC |
| ENW Kenosha, WI | 139 nm out, 5 nm northeast of the line, tower | VFR | from the southwest (230°) at 9 knots | 10+ mi | none | 742 ft | 14:53 UTC |
| OVS Boscobel, WI | 268 nm out, 4 nm southeast of the line | VFR | from the southwest (220°) at 10 knots, gusting to 17 | 10+ mi | none | 672 ft | 14:53 UTC |
| RST Rochester, MN | 358 nm out, 20 nm northeast of the line, tower | VFR | from the south-southwest (200°) at 13 knots | 7 mi | none | 1,317 ft | 14:54 UTC |
| TKC Tracy, MN | 487 nm out, 5 nm north of the line | low IFR Sky: overcast at 200 feet Weather: fog | calm | 0.25 mi | 200 ft | 1,335 ft | 15:00 UTC |
| MKA Miller, SD | 636 nm out, 11 nm south of the line | no report just now | 1,569 ft | ||||
| BIL Billings, MT | 1044 nm out, 9 nm north of the line, tower | VFR Sky: a few clouds at 500 feet, a few clouds at 2,100 feet, scattered clouds at 3,700 feet | from the southwest (230°) at 3 knots | 10+ mi | none | 3,662 ft | 14:53 UTC |
| BZN Bozeman, MT | destination | low IFR Sky: overcast at 200 feet Weather: mist | from the south (170°) at 6 knots | 3 mi | 200 ft | 4,473 ft | 9:00 am MDT (15:00 UTC) |
The highest airport on this list sits at 4,473 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, 7:34 pm MDT (01:34 UTC)
Wind light and variable, visibility 6 miles, mist, overcast at 300 feet low IFR
The whole forecast for BZN
- From Mon 8:00 am MDT (14:00 UTC): wind light and variable, visibility 6 miles, mist, scattered clouds at 400 feet, overcast at 1,500 feet
- At times between Mon 8:00 am MDT (14:00 UTC) and 9:00 am MDT (15:00 UTC): visibility 1 mile, mist, overcast at 400 feet
- From Mon 11:00 am MDT (17:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 600 feet, overcast at 1,500 feet
- From Mon 7:00 pm MDT (01:00 UTC): wind light and variable, visibility 6 miles, mist, overcast at 300 feet
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 IN2 7:03 pm EDT (23:03 UTC), at BZN 6:42 pm MDT (00:42 UTC) (civil twilight ends 7:12 pm MDT (01:12 UTC)). At 120 knots the arrival at BZN is after sunset there (6:44 pm MDT (00:44 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: Snow Lake Seaplane Base, Bozeman Yellowstone International.