Boeing Fld/King County International to MC Call Municipal BFI → MYL
302 nautical miles (348 statute miles) southeast on a straight line, true course 119°, about 104° magnetic at the departure end (variation 15E). At 120 knots that is 2 h 17 min at the quickest height in today's winds (39,000 ft, a 12-knot tailwind), arriving about 7:48 pm MDT (01:48 UTC), after sunset at the destination. Right now BFI is VFR, wind variable at 4 knots; MYL is VFR, wind from the west-northwest (290°) at 9 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: 3 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 TANGO 1W: moderate turbulence above 18,000 ft from 25,000 ft to 39,000 ft. Over the first 0 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the last 185 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 127 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 39 nm of 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). Over the last 10 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 BFI.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- C172 at 5,500 ft, 47 nm northeast, 3:17 pm PDT (22:17 UTC): a trace of rime icing, 0 °C, remarks: zse. 176 nm along the route, 47 nm northeast of the line.
as filed, and in English
PUW UA /OV PUW250030/TM 2217/FL055/TP C172/TA 00/IC TRACE RIME/RM -ZSE
- Report
- a routine report filed through PUW
- Where
- 30 nm west (250°) of PUW
- Time
- 22:17 UTC
- Height
- at 5,500 ft
- Aircraft
- C172
- Temperature
- 0 °C
- Icing
- trace rime
- Remarks
- zse
- GL7T at 40,000 ft, 20 nm southwest, 2:35 pm PDT (21:35 UTC): light to moderate turbulence from 37,500 ft to 40,000 ft, remarks: durd-zse. 205 nm along the route, 20 nm southwest of the line.
as filed, and in English
PDT UA /OV PDT100030/TM 2135/FL400/TP GL7T/TB OCNL LGT-MOD 400-375/RM DURD-ZSE
- Report
- a routine report filed through PDT
- Where
- 30 nm east (100°) of PDT
- Time
- 21:35 UTC
- Height
- at 40,000 ft
- Aircraft
- GL7T
- Turbulence
- occasional light to moderate from 40,000 ft to 37,500 ft
- Remarks
- durd-zse
Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 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 4 forecast points nearest it (SEA, YKM, LWS, BOI). 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 | 020° at 10 kt | −1 kt | 121 kt | 2 h 30 min | 8:01 pm MDT (02:01 UTC) | |
| 5,500 ft | 030° at 13 kt | −1 kt | 4 °C | 121 kt | 2 h 30 min | 8:01 pm MDT (02:01 UTC) |
| 7,500 ft | 030° at 15 kt | 0 | -4 °C | 120 kt | 2 h 31 min | 8:02 pm MDT (02:02 UTC) |
| 9,500 ft | 030° at 15 kt | +1 kt | -7 °C | 119 kt | 2 h 32 min | 8:03 pm MDT (02:03 UTC) |
| 11,500 ft | 040° at 10 kt | +2 kt | -10 °C | 118 kt | 2 h 34 min | 8:05 pm MDT (02:05 UTC) |
| 13,500 ft | 050° at 8 kt | +2 kt | -14 °C | 118 kt | 2 h 34 min | 8:05 pm MDT (02:05 UTC) |
| 15,500 ft | 040° at 8 kt | +2 kt | -17 °C | 118 kt | 2 h 34 min | 8:05 pm MDT (02:05 UTC) |
| 17,500 ft | 040° at 8 kt | +2 kt | -20 °C | 118 kt | 2 h 34 min | 8:05 pm MDT (02:05 UTC) |
| 18,000 ft FL180 | 040° at 7 kt | +2 kt | -21 °C | 118 kt | 2 h 34 min | 8:05 pm MDT (02:05 UTC) |
| 24,000 ft FL240 | 340° at 11 kt | −7 kt | -27 °C | 127 kt | 2 h 23 min | 7:54 pm MDT (01:54 UTC) |
| 30,000 ft FL300 | 320° at 10 kt | −8 kt | -36 °C | 128 kt | 2 h 22 min | 7:53 pm MDT (01:53 UTC) |
| 34,000 ft FL340 | 280° at 9 kt | −7 kt | -38 °C | 127 kt | 2 h 23 min | 7:54 pm MDT (01:54 UTC) |
| 39,000 ft FL390 | 260° at 16 kt | −12 kt | -41 °C | 132 kt | 2 h 17 min | 7:48 pm MDT (01:48 UTC) |
Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SEA | used from 0 nm out; 23 nm from the line | 360/9 | 350/10 1° | 010/10 -5° | 030/20 -11° | 020/60 -17° | 010/86 -26° | 360/90 -40° | 010/68 -42° | 360/31 -43° |
| YKM | used from 49 nm out; 23 nm from the line | 030/16 | 020/18 0° | 030/30 -8° | 030/23 -13° | 020/40 -23° | 010/73 -29° | 010/54 -36° | 360/29 -37° | 330/16 -40° |
| LWS | used from 146 nm out; 73 nm from the line | 010/5 | 050/14 -2° | 040/12 -6° | 160/7 -10° | 190/30 -22° | 200/54 -27° | 200/48 -35° | 210/40 -37° | 230/32 -41° |
| BOI | used from 293 nm out; 82 nm from the line | 330/14 4° | 230/5 -2° | 220/20 -7° | 210/37 -20° | 200/59 -26° | 200/67 -34° | 210/73 -35° | 220/62 -41° |
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 |
|---|---|---|---|---|---|---|---|
| BFI Seattle, WA | departure | VFR Sky: a few clouds at 5,000 feet | variable at 4 knots | 10+ mi | none | 21 ft | 3:53 pm PDT (22:53 UTC) |
| ESW Easton, WA | 49 nm out, 8 nm north of the line | no report just now | 2,226 ft | ||||
| YKM Yakima, WA | 88 nm out, 14 nm south of the line, tower | VFR Sky: overcast at 8,000 feet | from the northeast (040°) at 9 knots | 10+ mi | 8,000 ft | 1,098 ft | 22:53 UTC |
| PSC Pasco, WA | 146 nm out, 5 nm east of the line, tower | VFR Sky: overcast at 7,500 feet | from the north-northeast (030°) at 12 knots | 10+ mi | 7,500 ft | 410 ft | 22:53 UTC |
| ALW Walla Walla, WA | 185 nm out, 10 nm northeast of the line, tower | VFR Sky: a broken layer at 3,900 feet, a broken layer at 7,500 feet | from the northeast (050°) at 4 knots | 10+ mi | 3,900 ft | 1,194 ft | 22:53 UTC |
| JSY Joseph, OR | 244 nm out, 4 nm south of the line | VFR | from the south-southwest (210°) at 4 knots | 10+ mi | none | 4,126 ft | 14:30 UTC |
| MYL Mc Call, ID | destination | VFR Sky: a few clouds at 2,700 feet, a broken layer at 6,000 feet, a broken layer at 12,000 feet | from the west-northwest (290°) at 9 knots | 10+ mi | 6,000 ft | 5,024 ft | 4:51 pm MDT (22:51 UTC) |
The highest airport on this list sits at 5,024 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At MYL when you get there the forecast at the estimated arrival, 7:48 pm MDT (01:48 UTC)
Wind from the north-northwest at 7 knots, visibility more than 6 miles, light rain showers, scattered clouds at 2,000 feet, overcast at 3,000 feet marginal VFR
The whole forecast for MYL
- From Sun 12:00 pm MDT (18:00 UTC): wind from the west-northwest at 8 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,000 feet, overcast at 4,000 feet
- From Sun 5:00 pm MDT (23:00 UTC): wind from the north-northwest at 7 knots, visibility more than 6 miles, light rain showers, scattered clouds at 2,000 feet, overcast at 3,000 feet
- 30% chance between Sun 11:00 pm MDT (05:00 UTC) and 5:00 am MDT (11:00 UTC): visibility 2 miles, light showers rain snow, mist, scattered clouds at 800 feet, overcast at 1,500 feet
- From Mon 5:00 am MDT (11:00 UTC): wind light and variable, visibility more than 6 miles, fog nearby, scattered clouds at 1,000 feet, overcast at 2,500 feet
- From Mon 10:00 am MDT (16:00 UTC): wind light and variable, visibility more than 6 miles, overcast at 3,500 feet
The forecast for BFI, the departure
- From Sun 11:00 am PDT (18:00 UTC): wind from the north at 5 knots, visibility more than 6 miles, a few clouds at 10,000 feet
- From Sun 2:00 pm PDT (21:00 UTC): wind from the north-northwest at 9 knots, visibility more than 6 miles, scattered clouds at 20,000 feet
- From Sun 7:00 pm PDT (02:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
- From Mon 2:00 am PDT (09:00 UTC): wind from the southeast at 2 knots, visibility more than 6 miles, patches of fog, clear skies
- From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 3 knots, visibility more than 6 miles, clear skies
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 BFI 6:27 pm PDT (01:27 UTC), at MYL 7:05 pm MDT (01:05 UTC) (civil twilight ends 7:34 pm MDT (01:34 UTC)). At 120 knots the arrival at MYL is after sunset there (7:06 pm MDT (01:06 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: Boeing Fld/King County International, MC Call Municipal.