Missoula Montana Airport to Tweed/New Haven Airport MSO → HVN
1,788 nautical miles (2,057 statute miles) east on a straight line, true course 086°, about 073° magnetic at the departure end (variation 13E). At 120 knots that is 10 h 17 min at the quickest height in today's winds (39,000 ft, a 54-knot tailwind), arriving about 12:23 pm EDT (16:23 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: 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 first 779 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the first 330 nm of the route.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 130 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 220 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 340 to 350 nm out.
- AIRMET TANGO 3W: 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 route from 989 to 1079 nm out.
- AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 539 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 230 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1568 to 1708 nm out.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 10,000 ft. Near the route, at the destination end.
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 MSO.
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 02:00–09:00 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 16 forecast points nearest it (GPI, GTF, BIL, MLS, DIK, MOT, ABR, AXN, DLH, GRB, TVC, BUF, SYR, AVP, ALB, BDL). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 3,500 ft | 270° at 6 kt | −5 kt | 125 kt | 14 h 18 min | 4:24 pm EDT (20:24 UTC) | |
| 5,500 ft | 250° at 4 kt | −4 kt | 3 °C | 124 kt | 14 h 25 min | 4:31 pm EDT (20:31 UTC) |
| 7,500 ft | 240° at 8 kt | −7 kt | 9 °C | 127 kt | 14 h 05 min | 4:11 pm EDT (20:11 UTC) |
| 9,500 ft | 240° at 12 kt | −10 kt | 5 °C | 130 kt | 13 h 45 min | 3:51 pm EDT (19:51 UTC) |
| 11,500 ft | 240° at 18 kt | −14 kt | 2 °C | 134 kt | 13 h 21 min | 3:27 pm EDT (19:27 UTC) |
| 13,500 ft | 240° at 21 kt | −18 kt | -2 °C | 138 kt | 12 h 57 min | 3:03 pm EDT (19:03 UTC) |
| 15,500 ft | 250° at 23 kt | −21 kt | -6 °C | 141 kt | 12 h 41 min | 2:47 pm EDT (18:47 UTC) |
| 17,500 ft | 250° at 25 kt | −24 kt | -10 °C | 144 kt | 12 h 25 min | 2:31 pm EDT (18:31 UTC) |
| 18,000 ft FL180 | 250° at 26 kt | −25 kt | -11 °C | 145 kt | 12 h 20 min | 2:26 pm EDT (18:26 UTC) |
| 24,000 ft FL240 | 250° at 30 kt | −28 kt | -22 °C | 148 kt | 12 h 05 min | 2:11 pm EDT (18:11 UTC) |
| 30,000 ft FL300 | 250° at 34 kt | −32 kt | -37 °C | 152 kt | 11 h 46 min | 1:52 pm EDT (17:52 UTC) |
| 34,000 ft FL340 | 260° at 44 kt | −42 kt | -43 °C | 162 kt | 11 h 02 min | 1:08 pm EDT (17:08 UTC) |
| 39,000 ft FL390 | 260° at 57 kt | −54 kt | -50 °C | 174 kt | 10 h 17 min | 12:23 pm EDT (16:23 UTC) |
Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| GPI | used from 0 nm out; 88 nm from the line | 070/19 -5° | 100/16 -7° | 080/10 -8° | 130/8 -19° | 170/37 -28° | 200/50 -40° | 210/43 -40° | 220/41 -42° | |
| GTF | used from 50 nm out; 47 nm from the line | 070/11 | 080/15 -7° | 110/19 -9° | 190/25 -14° | 200/34 -23° | 200/54 -39° | 220/66 -40° | 220/77 -44° | |
| BIL | used from 200 nm out; 76 nm from the line | 080/13 | 180/9 -2° | 210/38 0° | 220/51 -11° | 210/46 -22° | 210/58 -35° | 230/73 -39° | 230/72 -45° | |
| MLS | used from 250 nm out; 73 nm from the line | 150/23 2° | 190/29 4° | 210/44 2° | 220/32 -10° | 210/36 -21° | 200/48 -37° | 230/63 -40° | 240/71 -47° | |
| DIK | used from 399 nm out; 39 nm from the line | 150/24 7° | 200/38 6° | 220/53 0° | 230/51 -9° | 230/49 -21° | 240/37 -37° | 240/47 -44° | 250/65 -48° | |
| MOT | used from 549 nm out; 101 nm from the line | 120/14 5° | 200/20 4° | 230/33 1° | 250/39 -11° | 250/50 -21° | 240/61 -37° | 250/56 -45° | 260/68 -51° | |
| ABR | used from 599 nm out; 77 nm from the line | 070/14 | 250/10 17° | 270/16 11° | 260/28 5° | 260/36 -10° | 260/41 -22° | 270/33 -37° | 260/42 -42° | 260/50 -48° |
| AXN | used from 699 nm out; 58 nm from the line | 100/14 | 250/21 14° | 240/24 12° | 240/31 5° | 260/36 -10° | 260/40 -21° | 250/42 -36° | 260/48 -45° | 260/53 -50° |
| DLH | used from 849 nm out; 57 nm from the line | 080/28 | 240/21 15° | 250/26 9° | 250/32 3° | 260/42 -11° | 270/40 -21° | 260/43 -36° | 260/46 -46° | 260/65 -54° |
| GRB | used from 999 nm out; 83 nm from the line | 250/36 | 270/23 16° | 270/14 9° | 240/18 4° | 280/26 -9° | 280/29 -20° | 290/42 -36° | 290/51 -45° | 290/72 -55° |
| TVC | used from 1148 nm out; 20 nm from the line | 260/31 | 280/22 15° | 290/18 10° | 270/13 2° | 290/25 -10° | 300/35 -21° | 310/52 -37° | 320/59 -47° | 300/84 -54° |
| BUF | used from 1348 nm out; 136 nm from the line | 320/10 | 010/16 10° | 360/10 6° | 340/13 2° | 330/22 -11° | 300/25 -23° | 320/31 -38° | 300/29 -44° | 280/36 -50° |
| SYR | used from 1548 nm out; 58 nm from the line | 280/13 | 350/18 10° | 340/10 6° | 300/15 1° | 280/17 -12° | 270/16 -23° | 280/25 -38° | 250/40 -42° | 240/53 -50° |
| AVP | used from 1648 nm out; 48 nm from the line | 150/5 | 350/13 12° | 270/20 8° | 260/17 4° | 260/25 -11° | 240/31 -22° | 240/54 -35° | 230/61 -41° | 240/55 -49° |
| ALB | used from 1698 nm out; 65 nm from the line | 120/9 | 270/8 10° | L/V 5° | 260/9 1° | 260/34 -10° | 250/42 -22° | 240/57 -35° | 240/70 -42° | 240/65 -50° |
| BDL | used from 1748 nm out; 42 nm from the line | 120/24 | 290/23 12° | 280/21 8° | 250/36 3° | 250/41 -11° | 230/48 -21° | 230/78 -32° | 230/96 -41° | 230/86 -52° |
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 |
|---|---|---|---|---|---|---|---|
| MSO Missoula, MT | departure | no report just now | 3,205 ft | ||||
| HLN Helena, MT | 90 nm out, 24 nm south of the line, tower | no report just now | 3,877 ft | ||||
| LWT Lewistown, MT | 190 nm out, 1 nm south of the line | no report just now | 4,170 ft | ||||
| GDV Glendive, MT | 379 nm out, 7 nm north of the line | no report just now | 2,458 ft | ||||
| BIS Bismarck, ND | 549 nm out, 4 nm southwest of the line, tower | no report just now | 1,661 ft | ||||
| SAZ Staples, MN | 789 nm out, 7 nm northeast of the line | no report just now | 1,287 ft | ||||
| PBH Phillips, WI | 979 nm out, 4 nm northeast of the line | no report just now | 1,497 ft | ||||
| GOV Grayling, MI | 1228 nm out, 5 nm northeast of the line, tower | no report just now | 1,158 ft | ||||
| OSC Oscoda, MI | 1288 nm out, 9 nm north of the line | no report just now | 633 ft | ||||
| IAG Niagara Falls, NY | 1498 nm out, 4 nm southwest of the line, tower | no report just now | 592 ft | ||||
| POU Poughkeepsie, NY | 1738 nm out, 1 nm northeast of the line, tower | no report just now | 163 ft | ||||
| HVN New Haven, CT | destination | no report just now | 12 ft |
The highest airport on this list sits at 4,170 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At HVN when you get there the forecast at the estimated arrival, 12:23 pm EDT (16:23 UTC)
HVN 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 MSO 6:53 pm MDT (00:53 UTC), at HVN 6:15 pm EDT (22:15 UTC) (civil twilight ends 6:43 pm EDT (22:43 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: Missoula Montana Airport, Tweed/New Haven Airport.