Westchester County to Joslin Fld/Magic Valley Regional HPN → TWF
1,810 nautical miles (2,083 statute miles) west on a straight line, true course 286°, about 299° magnetic at the departure end (variation 13W). At 120 knots that is 17 h 05 min at the quickest height in today's winds (4,500 ft, a 14-knot headwind), arriving about 1:47 am MDT (07:47 UTC), after sunset at the destination. 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
- SIGMET W27W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the west at 45 knots, until 11:55 am EDT (15:55 UTC). Near the route, 1691 nm along the route.
as issued
WSUS33 KKCI 121355 MKCW WST 121355 CONVECTIVE SIGMET 27W VALID UNTIL 1555Z WY UT ID FROM 40E PIH-20NW BPI-50E SLC-20SW SLC-40E PIH DMSHG AREA TS MOV FROM 26045KT. TOPS TO FL270.
- 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 first 0 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 40,000 ft. Over the first 20 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 70 to 249 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 route from 139 to 308 nm out.
- 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 route from 945 to 1800 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Near the route, 1452 nm along the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 338 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the last 298 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 HPN.
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 16 forecast points nearest it (JFK, AVP, PSB, BUF, CLE, MKG, GRB, DBQ, LSE, MCW, FSD, ONL, PIR, RAP, LND, PIH). 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 | 270° at 14 kt | +14 kt | 9 °C | 106 kt | 17 h 05 min | 1:47 am MDT (07:47 UTC) |
| 6,500 ft | 270° at 15 kt | +15 kt | 13 °C | 105 kt | 17 h 14 min | 1:56 am MDT (07:56 UTC) |
| 8,500 ft | 260° at 17 kt | +18 kt | 10 °C | 102 kt | 17 h 45 min | 2:27 am MDT (08:27 UTC) |
| 10,500 ft | 260° at 19 kt | +20 kt | 5 °C | 100 kt | 18 h 06 min | 2:48 am MDT (08:48 UTC) |
| 12,500 ft | 260° at 20 kt | +22 kt | 2 °C | 98 kt | 18 h 28 min | 3:10 am MDT (09:10 UTC) |
| 14,500 ft | 260° at 22 kt | +23 kt | -3 °C | 97 kt | 18 h 40 min | 3:22 am MDT (09:22 UTC) |
| 16,500 ft | 250° at 25 kt | +25 kt | -7 °C | 95 kt | 19 h 03 min | 3:45 am MDT (09:45 UTC) |
| 18,000 ft FL180 | 250° at 26 kt | +27 kt | -11 °C | 93 kt | 19 h 28 min | 4:10 am MDT (10:10 UTC) |
| 24,000 ft FL240 | 250° at 35 kt | +34 kt | -23 °C | 86 kt | 21 h 03 min | 5:45 am MDT (11:45 UTC) |
| 30,000 ft FL300 | 250° at 41 kt | +42 kt | -34 °C | 78 kt | 23 h 12 min | 7:54 am MDT (13:54 UTC) |
| 34,000 ft FL340 | 260° at 43 kt | +46 kt | -40 °C | 74 kt | 24 h 28 min | 9:10 am MDT (15:10 UTC) |
| 39,000 ft FL390 | 270° at 46 kt | +50 kt | -46 °C | 70 kt | 25 h 51 min | 10:33 am MDT (16:33 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| JFK | used from 0 nm out; 39 nm from the line | 360/20 | 340/23 11° | 340/26 8° | 350/26 3° | 350/30 -8° | 350/36 -21° | 350/52 -36° | 350/54 -44° | 320/45 -53° |
| AVP | used from 50 nm out; 20 nm from the line | 330/21 | 340/24 14° | 350/27 9° | 350/25 3° | 330/29 -8° | 310/31 -20° | 330/41 -36° | 330/57 -46° | 320/55 -51° |
| PSB | used from 149 nm out; 64 nm from the line | 330/23 14° | 340/24 9° | 340/25 3° | 320/24 -8° | 300/29 -20° | 310/39 -36° | 310/52 -46° | 310/56 -50° | |
| BUF | used from 199 nm out; 56 nm from the line | 270/25 | 300/28 14° | 300/29 8° | 310/29 2° | 300/30 -9° | 290/33 -21° | 290/44 -37° | 290/56 -47° | 300/62 -51° |
| CLE | used from 298 nm out; 78 nm from the line | 280/17 | 270/17 14° | 280/22 10° | 290/26 4° | 290/25 -8° | 280/31 -21° | 280/35 -36° | 280/43 -44° | 300/53 -48° |
| MKG | used from 448 nm out; 99 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° |
| GRB | used from 647 nm out; 73 nm from the line | 260/10 | 240/27 16° | 260/31 10° | 270/25 5° | 280/31 -10° | 280/35 -22° | 270/46 -37° | 290/43 -40° | 300/64 -48° |
| DBQ | used from 696 nm out; 76 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 746 nm out; 32 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 845 nm out; 28 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 945 nm out; 61 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° |
| ONL | used from 1094 nm out; 73 nm from the line | 270/16 17° | 250/25 13° | 230/34 7° | 230/46 -9° | 240/57 -22° | 250/72 -31° | 250/87 -36° | 250/75 -46° | |
| PIR | used from 1144 nm out; 45 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 1243 nm out; 45 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° | |
| LND | used from 1442 nm out; 92 nm from the line | 220/16 3° | 230/26 -1° | 210/30 -14° | 220/57 -26° | 220/60 -31° | 220/62 -38° | 220/52 -44° | ||
| PIH | used from 1641 nm out; 58 nm from the line | L/V | 180/8 -1° | 190/21 -6° | 210/56 -18° | 190/64 -28° | 210/68 -31° | 210/60 -36° | 210/54 -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 |
|---|---|---|---|---|---|---|---|
| HPN White Plains, NY | departure | no report just now | 439 ft | ||||
| AVP Wilkes-Barre/Scranton, PA | 90 nm out, 9 nm southwest of the line, tower | no report just now | 961 ft | ||||
| ERI Erie, PA | 298 nm out, 13 nm south of the line, tower | no report just now | 732 ft | ||||
| PTK Pontiac, MI | 448 nm out, 7 nm south of the line, tower | no report just now | 980 ft | ||||
| MKG Muskegon, MI | 567 nm out, 6 nm northwest of the line, tower | no report just now | 628 ft | ||||
| RST Rochester, MN | 845 nm out, 21 nm north of the line, tower | no report just now | 1,317 ft | ||||
| FSD Sioux Falls, SD | 1034 nm out, 8 nm southeast of the line, tower | no report just now | 1,430 ft | ||||
| ICR Winner, SD | 1164 nm out, 17 nm south of the line | no report just now | 2,032 ft | ||||
| HSR Hot Springs, SD | 1323 nm out, 12 nm south of the line | no report just now | 3,150 ft | ||||
| RIW Riverton, WY | 1542 nm out, 9 nm south of the line | no report just now | 5,516 ft | ||||
| PIH Pocatello, ID | 1721 nm out, 10 nm northwest of the line, tower | no report just now | 4,451 ft | ||||
| TWF Twin Falls, ID | destination | no report just now | 4,153 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 TWF when you get there the forecast at the estimated arrival, 1:47 am MDT (07:47 UTC)
TWF 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 departure end · security · until 20 October · ZNY
Daylight
Sunset at HPN 6:19 pm EDT (22:19 UTC), at TWF 6:59 pm MDT (00:59 UTC) (civil twilight ends 7:27 pm MDT (01:27 UTC)). At 120 knots the arrival at TWF is before sunrise there (7:48 am MDT (13:48 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: Westchester County, Joslin Fld/Magic Valley Regional.