South Big Horn County to Eastern Oregon Regional AT Pendleton GEY → PDT
461 nautical miles (531 statute miles) west on a straight line, true course 283°, about 273° magnetic at the departure end (variation 10E). At 120 knots that is 3 h 31 min at the quickest height in today's winds (4,500 ft, a 11-knot tailwind), arriving about 4:11 am PDT (11:11 UTC), after sunset at the destination. Right now GEY is VFR, wind from the northwest (310°) at 10 knots; PDT is VFR, wind from the south (180°) at 3 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), from 12:00 am MDT (06:00 UTC). Over the first 363 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft, from 12:00 am MDT (06:00 UTC). Over the first 275 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 first 20 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft, from 12:00 am MDT (06:00 UTC). Over the first 39 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 451 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft, from 12:00 am MDT (06:00 UTC). Over the last 314 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 route from 167 to 353 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft, from 12:00 am MDT (06:00 UTC). Over the last 29 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 GEY.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- E73L descending, 49 nm north, 12:20 am MDT (06:20 UTC): remarks: breaking action good broke out about 600FT above ground. 147 nm along the route, 49 nm north of the line.
as filed, and in English
BZN UA /OV BZN/TM 0620/FLDURD/TP E73L/RM BREAKING ACTION GOOD. BROKE OUT ABOUT 600FT AGL
- Report
- a routine report filed through BZN
- Where
- over BZN
- Time
- 06:20 UTC
- Height
- during the descent
- Aircraft
- E73L
- Remarks
- breaking action good broke out about 600FT above ground
- B737 , 49 nm north, 11:31 pm MDT (05:31 UTC): remarks: saw the light at 500FT braking good no icing. 147 nm along the route, 49 nm north of the line.
as filed, and in English
BZN UA /OV BZN/TM 0531/FLBURD/TP B737/RM SAW THE LIGHT AT 500FT. BRAKING GOOD. NEG ICING
- Report
- a routine report filed through BZN
- Where
- over BZN
- Time
- 05:31 UTC
- Height
- at BURD
- Aircraft
- B737
- Remarks
- saw the light at 500FT braking good no icing
- E75L at 1,500 ft, 34 nm north, 10:49 pm MDT (04:49 UTC): remarks: low-level wind shear loss of 8 knots on final. At the destination end, 34 nm north of the line.
as filed, and in English
PSC UA /OV PSC120003/TM 0449/FL015/TP E75L/RM LLWS LOSS OF 8 KTS ON FINAL
- Report
- a routine report filed through PSC
- Where
- 3 nm southeast (120°) of PSC
- Time
- 04:49 UTC
- Height
- at 1,500 ft
- Aircraft
- E75L
- Remarks
- low-level wind shear loss of 8 knots on final
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 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 3 forecast points nearest it (BIL, DLN, LWS). 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 | 080° at 12 kt | −11 kt | 131 kt | 3 h 31 min | 4:11 am PDT (11:11 UTC) | |
| 6,500 ft | 080° at 11 kt | −10 kt | -3 °C | 130 kt | 3 h 33 min | 4:13 am PDT (11:13 UTC) |
| 8,500 ft | 070° at 6 kt | −5 kt | -6 °C | 125 kt | 3 h 41 min | 4:21 am PDT (11:21 UTC) |
| 10,500 ft | 210° at 5 kt | +1 kt | -5 °C | 119 kt | 3 h 52 min | 4:32 am PDT (11:32 UTC) |
| 12,500 ft | 220° at 16 kt | +7 kt | -6 °C | 113 kt | 4 h 05 min | 4:45 am PDT (11:45 UTC) |
| 14,500 ft | 210° at 23 kt | +7 kt | -10 °C | 113 kt | 4 h 05 min | 4:45 am PDT (11:45 UTC) |
| 16,500 ft | 200° at 30 kt | +7 kt | -14 °C | 113 kt | 4 h 05 min | 4:45 am PDT (11:45 UTC) |
| 18,000 ft FL180 | 200° at 35 kt | +7 kt | -17 °C | 113 kt | 4 h 05 min | 4:45 am PDT (11:45 UTC) |
| 24,000 ft FL240 | 190° at 49 kt | +5 kt | -27 °C | 115 kt | 4 h 01 min | 4:41 am PDT (11:41 UTC) |
| 30,000 ft FL300 | 210° at 52 kt | +16 kt | -35 °C | 104 kt | 4 h 26 min | 5:06 am PDT (12:06 UTC) |
| 34,000 ft FL340 | 220° at 58 kt | +26 kt | -36 °C | 94 kt | 4 h 54 min | 5:34 am PDT (12:34 UTC) |
| 39,000 ft FL390 | 220° at 54 kt | +30 kt | -41 °C | 90 kt | 5 h 07 min | 5:47 am PDT (12:47 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BIL | used from 0 nm out; 72 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° | |
| DLN | used from 98 nm out; 73 nm from the line | 090/6 -6° | 240/22 -4° | 210/34 -16° | 210/62 -25° | 210/66 -34° | 210/82 -36° | 220/77 -42° | ||
| LWS | used from 294 nm out; 85 nm from the line | 070/10 | 080/12 -2° | 030/12 -6° | 080/7 -10° | 170/34 -21° | 160/46 -32° | 200/33 -35° | 220/22 -35° | 230/18 -38° |
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 |
|---|---|---|---|---|---|---|---|
| GEY Greybull, WY | departure | VFR Sky: a few clouds at 1,400 feet, overcast at 3,600 feet Weather: light rain | from the northwest (310°) at 10 knots | 10+ mi | 3,600 ft | 3,941 ft | 1:00 am MDT (07:00 UTC) |
| COD Cody, WY | 39 nm out, 8 nm south of the line | low IFR Sky: overcast at 400 feet | from the north-northeast (030°) at 8 knots | 9 mi | 400 ft | 5,102 ft | 07:08 UTC |
| WYS West Yellowstone, MT | 128 nm out, 16 nm south of the line | marginal VFR Sky: a few clouds at 600 feet, scattered clouds at 1,000 feet, overcast at 3,100 feet Weather: mist | calm | 4 mi | 3,100 ft | 6,649 ft | 07:35 UTC |
| EKS Ennis, MT | 157 nm out, 15 nm north of the line | marginal VFR Sky: scattered clouds at 400 feet, a broken layer at 1,500 feet, overcast at 2,900 feet Weather: light snow | calm | 8 mi | 1,500 ft | 5,432 ft | 07:35 UTC |
| DLN Dillon, MT | 196 nm out, 7 nm north of the line | marginal VFR Sky: scattered clouds at 700 feet, a broken layer at 1,100 feet, overcast at 2,300 feet Weather: mist | from the northeast (050°) at 8 knots | 4 mi | 1,100 ft | 5,244 ft | 07:29 UTC |
| SMN Salmon, ID | 245 nm out, 10 nm southwest of the line | VFR Sky: a few clouds at 700 feet, overcast at 6,000 feet | from the north-northwest (340°) at 6 knots | 10+ mi | 6,000 ft | 4,044 ft | 06:56 UTC |
| JSY Joseph, OR | 392 nm out, 14 nm south of the line | VFR | from the south-southwest (210°) at 4 knots | 10+ mi | none | 4,126 ft | 14:30 UTC |
| LGD La Grande, OR | 422 nm out, 21 nm south of the line | VFR Sky: overcast at 3,600 feet | from the west-northwest (290°) at 11 knots | 10+ mi | 3,600 ft | 2,717 ft | 06:56 UTC |
| PDT Pendleton, OR | destination | VFR Sky: overcast at 6,500 feet | from the south (180°) at 3 knots | 10+ mi | 6,500 ft | 1,494 ft | 11:53 pm PDT (06:53 UTC) |
The highest airport on this list sits at 6,649 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At PDT when you get there the forecast at the estimated arrival, 4:11 am PDT (11:11 UTC)
Wind light and variable, visibility more than 6 miles, scattered clouds at 5,000 feet, a broken layer at 10,000 feet VFR
The whole forecast for PDT
- From Sun 11:00 pm PDT (06:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 5,000 feet, a broken layer at 10,000 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 GEY 6:31 pm MDT (00:31 UTC), at PDT 6:13 pm PDT (01:13 UTC) (civil twilight ends 6:43 pm PDT (01:43 UTC)). At 120 knots the arrival at PDT is before sunrise there (7:07 am PDT (14:07 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: South Big Horn County, Eastern Oregon Regional AT Pendleton.