Joslin Fld/Magic Valley Regional to Westchester County TWF → HPN
1,810 nautical miles (2,083 statute miles) east on a straight line, true course 079°, about 066° magnetic at the departure end (variation 13E). At 120 knots that is 10 h 46 min at the quickest height in today's winds (39,000 ft, a 48-knot tailwind), arriving about 3:47 pm EDT (19:47 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 766 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the first 308 nm of the route.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Near the route, at the departure end.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 139 nm of the route.
- 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 route from 308 to 477 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 308 to 328 nm out.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 318 nm along the route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 338 to 378 nm out.
- AIRMET TANGO 2W: 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 855 to 1114 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, fog). Over the last 527 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 1572 to 1751 nm out.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 33,000 ft. Over the last 139 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 TWF.
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 14 forecast points nearest it (PIH, LND, RAP, PIR, FSD, MCW, LSE, GRB, MKG, CLE, BUF, PSB, AVP, JFK). 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 | 260° at 15 kt | −16 kt | 136 kt | 13 h 19 min | 6:20 pm EDT (22:20 UTC) | |
| 5,500 ft | 270° at 11 kt | −12 kt | 15 °C | 132 kt | 13 h 43 min | 6:44 pm EDT (22:44 UTC) |
| 7,500 ft | 260° at 11 kt | −12 kt | 11 °C | 132 kt | 13 h 43 min | 6:44 pm EDT (22:44 UTC) |
| 9,500 ft | 250° at 13 kt | −14 kt | 7 °C | 134 kt | 13 h 30 min | 6:31 pm EDT (22:31 UTC) |
| 11,500 ft | 250° at 17 kt | −18 kt | 4 °C | 138 kt | 13 h 07 min | 6:08 pm EDT (22:08 UTC) |
| 13,500 ft | 250° at 19 kt | −20 kt | 0 °C | 140 kt | 12 h 56 min | 5:57 pm EDT (21:57 UTC) |
| 15,500 ft | 250° at 20 kt | −22 kt | -5 °C | 142 kt | 12 h 45 min | 5:46 pm EDT (21:46 UTC) |
| 17,500 ft | 250° at 22 kt | −23 kt | -10 °C | 143 kt | 12 h 39 min | 5:40 pm EDT (21:40 UTC) |
| 18,000 ft FL180 | 250° at 22 kt | −23 kt | -11 °C | 143 kt | 12 h 39 min | 5:40 pm EDT (21:40 UTC) |
| 24,000 ft FL240 | 250° at 26 kt | −28 kt | -22 °C | 148 kt | 12 h 14 min | 5:15 pm EDT (21:15 UTC) |
| 30,000 ft FL300 | 260° at 32 kt | −35 kt | -35 °C | 155 kt | 11 h 41 min | 4:42 pm EDT (20:42 UTC) |
| 34,000 ft FL340 | 260° at 38 kt | −41 kt | -40 °C | 161 kt | 11 h 15 min | 4:16 pm EDT (20:16 UTC) |
| 39,000 ft FL390 | 270° at 45 kt | −48 kt | -48 °C | 168 kt | 10 h 46 min | 3:47 pm EDT (19:47 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| PIH | used from 0 nm out; 63 nm from the line | 070/8 | 150/19 1° | 180/32 -4° | 210/44 -17° | 210/37 -28° | 210/74 -31° | 220/68 -35° | 220/60 -43° | |
| LND | used from 149 nm out; 83 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° | ||
| RAP | used from 398 nm out; 89 nm from the line | 250/28 16° | 260/31 10° | 240/25 4° | 210/35 -10° | 200/45 -23° | 230/47 -31° | 230/47 -36° | 230/51 -46° | |
| PIR | used from 547 nm out; 70 nm from the line | 230/15 15° | 220/22 14° | 220/24 6° | 200/32 -10° | 210/48 -22° | 240/45 -33° | 240/43 -37° | 250/55 -46° | |
| FSD | used from 696 nm out; 59 nm from the line | 210/20 | 230/23 21° | 220/25 14° | 230/30 5° | 230/26 -9° | 240/30 -21° | 270/33 -36° | 260/47 -37° | 270/58 -47° |
| MCW | used from 845 nm out; 65 nm from the line | 250/36 | 250/24 19° | 240/26 11° | 250/30 5° | 270/22 -9° | 260/30 -21° | 260/31 -36° | 280/53 -38° | 280/66 -48° |
| LSE | used from 995 nm out; 23 nm from the line | 250/25 | 240/21 17° | 240/28 11° | 250/28 5° | 280/24 -10° | 280/31 -21° | 260/35 -37° | 270/45 -43° | 280/59 -47° |
| GRB | used from 1094 nm out; 78 nm from the line | 250/32 | 250/22 17° | 240/18 8° | 280/21 6° | 280/34 -11° | 280/35 -21° | 280/39 -37° | 270/52 -45° | 290/60 -49° |
| MKG | used from 1144 nm out; 70 nm from the line | 260/28 | 260/18 15° | 250/16 9° | 260/22 4° | 280/31 -9° | 270/35 -21° | 270/44 -35° | 270/42 -45° | 290/61 -51° |
| CLE | used from 1343 nm out; 105 nm from the line | 310/7 | 350/20 14° | 340/16 9° | 320/21 2° | 320/32 -8° | 330/34 -20° | 330/45 -36° | 320/60 -45° | 320/64 -51° |
| BUF | used from 1492 nm out; 70 nm from the line | 300/11 | 330/15 11° | 340/26 8° | 330/28 2° | 340/31 -10° | 340/32 -21° | 340/52 -37° | 340/59 -46° | 330/66 -53° |
| PSB | used from 1591 nm out; 62 nm from the line | 020/21 12° | 360/28 7° | 360/29 1° | 350/33 -10° | 350/42 -22° | 350/49 -37° | 340/63 -43° | 350/39 -52° | |
| AVP | used from 1641 nm out; 53 nm from the line | 010/20 | 020/24 11° | 360/19 8° | 350/23 2° | 320/24 -11° | 330/25 -22° | 330/27 -37° | 310/28 -42° | 290/30 -50° |
| JFK | used from 1790 nm out; 29 nm from the line | 020/25 | 290/9 12° | 300/12 7° | 320/14 3° | 290/17 -10° | 240/27 -21° | 240/44 -36° | 240/53 -41° | 240/51 -50° |
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 |
|---|---|---|---|---|---|---|---|
| TWF Twin Falls, ID | departure | no report just now | 4,153 ft | ||||
| PIH Pocatello, ID | 90 nm out, 10 nm northwest of the line, tower | no report just now | 4,451 ft | ||||
| RIW Riverton, WY | 269 nm out, 9 nm south of the line | no report just now | 5,516 ft | ||||
| HSR Hot Springs, SD | 487 nm out, 12 nm south of the line | no report just now | 3,150 ft | ||||
| ICR Winner, SD | 647 nm out, 17 nm south of the line | no report just now | 2,032 ft | ||||
| FSD Sioux Falls, SD | 776 nm out, 8 nm southeast of the line, tower | no report just now | 1,430 ft | ||||
| RST Rochester, MN | 965 nm out, 21 nm north of the line, tower | no report just now | 1,317 ft | ||||
| MKG Muskegon, MI | 1243 nm out, 6 nm northwest of the line, tower | no report just now | 628 ft | ||||
| PTK Pontiac, MI | 1363 nm out, 7 nm south of the line, tower | no report just now | 980 ft | ||||
| ERI Erie, PA | 1512 nm out, 13 nm south of the line, tower | no report just now | 732 ft | ||||
| AVP Wilkes-Barre/Scranton, PA | 1721 nm out, 9 nm southwest of the line, tower | no report just now | 961 ft | ||||
| HPN White Plains, NY | destination | no report just now | 439 ft |
The highest airport on this list sits at 5,516 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At HPN when you get there the forecast at the estimated arrival, 3:47 pm EDT (19:47 UTC)
HPN has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 5/2811 NEW YORK, NY, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local 20 nm from the route, at the destination end · security · until 20 October · ZNY
Daylight
Sunset at TWF 6:59 pm MDT (00:59 UTC), at HPN 6:19 pm EDT (22:19 UTC) (civil twilight ends 6:46 pm EDT (22:46 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: Joslin Fld/Magic Valley Regional, Westchester County.