Joslin Fld/Magic Valley Regional to John F Kennedy International TWF → JFK
1,815 nautical miles (2,088 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 33 min at the quickest height in today's winds (39,000 ft, a 52-knot tailwind), arriving about 2:14 pm EDT (18:14 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
- SIGMET C13C: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 40 knots, until 2:55 am MDT (08:55 UTC). Near the route, 518 nm along the route.
as issued
WSUS32 KKCI 120655 MKCC WST 120655 CONVECTIVE SIGMET 13C VALID UNTIL 0855Z SD FROM 50NW DPR-30ESE DPR-20SE RAP-50WNW RAP-50NW DPR AREA TS MOV FROM 22040KT. TOPS TO FL300.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft, from 12:00 am MDT (06:00 UTC). Over the first 389 nm of the route.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft, from 12:00 am MDT (06:00 UTC). Over the first 10 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist), from 12:00 am MDT (06:00 UTC). Over the first 339 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft, from 12:00 am MDT (06:00 UTC). Over the route from 209 to 489 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft, from 12:00 am MDT (06:00 UTC). Over the route from 209 to 439 nm out.
- 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), from 12:00 am MDT (06:00 UTC). Over the route from 249 to 479 nm out.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots), from 12:00 am MDT (06:00 UTC). Near the route, 279 nm along the route.
- AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist), from 12:00 am MDT (06:00 UTC). Over the route from 479 to 638 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), from 12:00 am MDT (06:00 UTC). Over the route from 887 to 1097 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), from 12:00 am MDT (06:00 UTC). Over the last 568 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist), from 12:00 am MDT (06:00 UTC). Over the route from 1555 to 1725 nm out.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft, from 12:00 am MDT (06:00 UTC). Over the last 209 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 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 14 forecast points nearest it (PIH, LND, RAP, PIR, ONL, FSD, MCW, LSE, DBQ, MKG, CLE, 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 | 240° at 17 kt | −14 kt | 134 kt | 13 h 33 min | 5:14 pm EDT (21:14 UTC) | |
| 5,500 ft | 240° at 11 kt | −11 kt | 15 °C | 131 kt | 13 h 51 min | 5:32 pm EDT (21:32 UTC) |
| 7,500 ft | 240° at 13 kt | −12 kt | 12 °C | 132 kt | 13 h 45 min | 5:26 pm EDT (21:26 UTC) |
| 9,500 ft | 240° at 14 kt | −13 kt | 8 °C | 133 kt | 13 h 39 min | 5:20 pm EDT (21:20 UTC) |
| 11,500 ft | 240° at 16 kt | −14 kt | 5 °C | 134 kt | 13 h 33 min | 5:14 pm EDT (21:14 UTC) |
| 13,500 ft | 240° at 17 kt | −16 kt | 0 °C | 136 kt | 13 h 21 min | 5:02 pm EDT (21:02 UTC) |
| 15,500 ft | 250° at 19 kt | −19 kt | -4 °C | 139 kt | 13 h 03 min | 4:44 pm EDT (20:44 UTC) |
| 17,500 ft | 250° at 21 kt | −21 kt | -9 °C | 141 kt | 12 h 52 min | 4:33 pm EDT (20:33 UTC) |
| 18,000 ft FL180 | 250° at 21 kt | −22 kt | -10 °C | 142 kt | 12 h 47 min | 4:28 pm EDT (20:28 UTC) |
| 24,000 ft FL240 | 250° at 28 kt | −28 kt | -21 °C | 148 kt | 12 h 16 min | 3:57 pm EDT (19:57 UTC) |
| 30,000 ft FL300 | 250° at 36 kt | −36 kt | -34 °C | 156 kt | 11 h 38 min | 3:19 pm EDT (19:19 UTC) |
| 34,000 ft FL340 | 260° at 45 kt | −46 kt | -41 °C | 166 kt | 10 h 56 min | 2:37 pm EDT (18:37 UTC) |
| 39,000 ft FL390 | 260° at 50 kt | −52 kt | -48 °C | 172 kt | 10 h 33 min | 2:14 pm EDT (18:14 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| PIH | used from 0 nm out; 63 nm from the line | L/V | 240/13 1° | 240/15 -3° | 210/42 -15° | 200/70 -25° | 220/74 -29° | 220/71 -36° | 220/62 -43° | |
| LND | used from 150 nm out; 82 nm from the line | 200/23 6° | 220/31 1° | 220/39 -11° | 230/39 -23° | 220/51 -28° | 220/66 -37° | 230/68 -45° | ||
| RAP | used from 399 nm out; 90 nm from the line | 180/23 12° | 200/38 13° | 210/38 6° | 220/28 -10° | 230/34 -21° | 230/37 -36° | 250/52 -38° | 250/59 -46° | |
| PIR | used from 548 nm out; 75 nm from the line | 170/22 19° | 190/25 13° | 210/32 6° | 240/23 -9° | 250/32 -21° | 250/38 -36° | 260/44 -40° | 260/52 -47° | |
| ONL | used from 648 nm out; 67 nm from the line | 210/31 20° | 230/27 13° | 230/18 7° | 220/19 -8° | 240/26 -20° | 250/44 -35° | 270/52 -39° | 260/57 -47° | |
| FSD | used from 698 nm out; 57 nm from the line | 190/9 | 230/30 18° | 240/23 13° | 240/20 6° | 260/22 -9° | 250/31 -21° | 250/43 -36° | 260/49 -43° | 270/53 -47° |
| MCW | used from 847 nm out; 59 nm from the line | 220/44 | 250/30 17° | 230/14 12° | 240/17 6° | 250/22 -8° | 270/29 -20° | 250/34 -34° | 260/52 -43° | 260/59 -51° |
| LSE | used from 997 nm out; 38 nm from the line | 230/40 | 240/24 17° | 240/13 10° | 250/13 6° | 280/22 -9° | 250/28 -21° | 250/41 -34° | 260/42 -44° | 270/62 -53° |
| DBQ | used from 1047 nm out; 53 nm from the line | 230/33 | 250/30 16° | 280/15 9° | 260/15 5° | 260/21 -7° | 260/24 -20° | 250/37 -33° | 270/42 -43° | 280/63 -52° |
| MKG | used from 1147 nm out; 71 nm from the line | 260/22 | 290/16 15° | 300/11 10° | 290/5 3° | 300/26 -9° | 300/32 -20° | 320/48 -36° | 320/61 -45° | 310/74 -53° |
| CLE | used from 1346 nm out; 91 nm from the line | 340/7 | 010/16 13° | 350/18 8° | 350/20 3° | 340/31 -10° | 340/46 -21° | 340/54 -37° | 330/62 -44° | 340/65 -49° |
| PSB | used from 1545 nm out; 65 nm from the line | 360/13 13° | 330/14 7° | 300/11 3° | 290/12 -11° | 240/23 -23° | 270/25 -36° | 250/34 -40° | 250/45 -48° | |
| AVP | used from 1645 nm out; 51 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° |
| JFK | used from 1745 nm out; 45 nm from the line | 250/18 | 250/23 14° | 240/33 9° | 240/33 4° | 240/38 -10° | 240/45 -21° | 230/86 -32° | 230/102 -40° | 230/84 -51° |
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, 11 nm northwest of the line, tower | no report just now | 4,451 ft | ||||
| CPR Casper, WY | 359 nm out, 23 nm south of the line, tower | no report just now | 5,344 ft | ||||
| HSR Hot Springs, SD | 489 nm out, 5 nm southeast of the line | no report just now | 3,150 ft | ||||
| ICR Winner, SD | 648 nm out, 8 nm south of the line | no report just now | 2,032 ft | ||||
| FSD Sioux Falls, SD | 778 nm out, 6 nm northeast of the line, tower | no report just now | 1,430 ft | ||||
| LNR Lone Rock, WI | 1067 nm out, 2 nm north of the line | no report just now | 717 ft | ||||
| MKE Milwaukee, WI | 1167 nm out, 2 nm southeast of the line, tower | no report just now | 728 ft | ||||
| DET Detroit, MI | 1386 nm out, 2 nm northeast of the line, tower | no report just now | 624 ft | ||||
| ERI Erie, PA | 1515 nm out, 9 nm north of the line, tower | no report just now | 732 ft | ||||
| MMU Morristown, NJ | 1785 nm out, 1 nm north of the line, tower | no report just now | 186 ft | ||||
| JFK New York, NY | destination | no report just now | 13 ft |
The highest airport on this list sits at 5,344 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At JFK when you get there the forecast at the estimated arrival, 2:14 pm EDT (18:14 UTC)
JFK has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 18 nm from the route, 1506 nm along the route · a VIP movement · today · ZOB
- 6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 18 nm from the route, 1506 nm along the route · a VIP movement · today · ZOB
- 5/2811 NEW YORK, NY, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local 3 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 JFK 6:19 pm EDT (22:19 UTC) (civil twilight ends 6:47 pm EDT (22:47 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, John F Kennedy International.