MC Call Municipal to Boeing Fld/King County International MYL → BFI
302 nautical miles (348 statute miles) northwest on a straight line, true course 304°, about 291° magnetic at the departure end (variation 13E). At 120 knots that is 2 h 29 min at the quickest height in today's winds (12,500 ft, a 2-knot tailwind), arriving about 7:43 pm PDT (02:43 UTC), after sunset at the destination. Right now MYL is VFR, wind from the west (280°) at 7 knots; BFI is VFR, wind variable at 6 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 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 10 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the first 185 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 39 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 127 nm of the route.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 25,000 ft to 39,000 ft. Over the last 0 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 MYL.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- GL7T at 40,000 ft, 20 nm southwest, 3:35 pm MDT (21:35 UTC): light to moderate turbulence from 37,500 ft to 40,000 ft, remarks: durd-zse. 98 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
- C172 at 5,500 ft, 47 nm northeast, 4:17 pm MDT (22:17 UTC): a trace of rime icing, 0 °C, remarks: zse. 127 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
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 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 (LWS, YKM, SEA). 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 | 030° at 11 kt | +1 kt | 119 kt | 2 h 32 min | 7:46 pm PDT (02:46 UTC) | |
| 6,500 ft | 030° at 14 kt | 0 | -2 °C | 120 kt | 2 h 31 min | 7:45 pm PDT (02:45 UTC) |
| 8,500 ft | 030° at 17 kt | 0 | -5 °C | 120 kt | 2 h 31 min | 7:45 pm PDT (02:45 UTC) |
| 10,500 ft | 040° at 13 kt | −1 kt | -9 °C | 121 kt | 2 h 30 min | 7:44 pm PDT (02:44 UTC) |
| 12,500 ft | 040° at 10 kt | −2 kt | -12 °C | 122 kt | 2 h 29 min | 7:43 pm PDT (02:43 UTC) |
| 14,500 ft | 040° at 10 kt | −2 kt | -15 °C | 122 kt | 2 h 29 min | 7:43 pm PDT (02:43 UTC) |
| 16,500 ft | 040° at 10 kt | −1 kt | -19 °C | 121 kt | 2 h 30 min | 7:44 pm PDT (02:44 UTC) |
| 18,000 ft FL180 | 030° at 11 kt | −1 kt | -21 °C | 121 kt | 2 h 30 min | 7:44 pm PDT (02:44 UTC) |
| 24,000 ft FL240 | 350° at 15 kt | +8 kt | -27 °C | 112 kt | 2 h 42 min | 7:56 pm PDT (02:56 UTC) |
| 30,000 ft FL300 | 340° at 14 kt | +10 kt | -36 °C | 110 kt | 2 h 45 min | 7:59 pm PDT (02:59 UTC) |
| 34,000 ft FL340 | 310° at 9 kt | +8 kt | -38 °C | 112 kt | 2 h 42 min | 7:56 pm PDT (02:56 UTC) |
| 39,000 ft FL390 | 270° at 14 kt | +12 kt | -41 °C | 108 kt | 2 h 48 min | 8:02 pm PDT (03:02 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| LWS | used from 0 nm out; 78 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° |
| YKM | used from 146 nm out; 43 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° |
| SEA | used from 244 nm out; 32 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° |
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 |
|---|---|---|---|---|---|---|---|
| MYL Mc Call, ID | departure | VFR Sky: a few clouds at 2,700 feet, a broken layer at 6,000 feet | from the west (280°) at 7 knots | 10+ mi | 6,000 ft | 5,024 ft | 5:51 pm MDT (23:51 UTC) |
| JSY Joseph, OR | 59 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 |
| ALW Walla Walla, WA | 117 nm out, 10 nm northeast of the line, tower | VFR Sky: overcast at 4,900 feet | calm | 10+ mi | 4,900 ft | 1,194 ft | 23:53 UTC |
| PSC Pasco, WA | 156 nm out, 5 nm east of the line, tower | VFR Sky: a few clouds at 7,000 feet | from the northeast (040°) at 11 knots | 10+ mi | none | 410 ft | 23:53 UTC |
| YKM Yakima, WA | 215 nm out, 14 nm south of the line, tower | VFR Sky: a broken layer at 8,500 feet | from the north-northeast (020°) at 5 knots | 10+ mi | 8,500 ft | 1,098 ft | 23:53 UTC |
| ESW Easton, WA | 254 nm out, 8 nm north of the line | no report just now | 2,226 ft | ||||
| BFI Seattle, WA | destination | VFR | variable at 6 knots | 10+ mi | none | 21 ft | 4:53 pm PDT (23:53 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 BFI when you get there the forecast at the estimated arrival, 7:43 pm PDT (02:43 UTC)
Wind light and variable, visibility more than 6 miles, clear skies VFR
The whole forecast for BFI
- From Sun 5:00 pm PDT (00:00 UTC): wind from the north-northwest at 8 knots, gusting to 18, visibility more than 6 miles, a few clouds at 5,000 feet
- From Sun 7:00 pm PDT (02:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
- From Mon 3:00 am PDT (10:00 UTC): wind light and variable, 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
- From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 3 knots, visibility more than 6 miles, clear skies
- From Mon 2:00 pm PDT (21:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, clear skies
The forecast for MYL, the departure
- From Sun 6:00 pm MDT (00:00 UTC): wind from the north-northwest at 8 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,500 feet, a broken layer at 3,500 feet
- At times between Sun 8:00 pm MDT (02:00 UTC) and 12:00 am MDT (06:00 UTC): wind light and variable, visibility 6 miles, light rain, mist, scattered clouds at 1,500 feet, overcast at 2,500 feet
- From Mon 12:00 am MDT (06:00 UTC): wind light and variable, visibility 2 miles, light snow, mist, scattered clouds at 800 feet, overcast at 1,500 feet
- From Mon 7:00 am MDT (13:00 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, a broken layer at 4,000 feet
- From Mon 4:00 pm MDT (22:00 UTC): wind from the west-northwest at 7 knots, visibility more than 6 miles, a broken layer at 5,000 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 MYL 7:05 pm MDT (01:05 UTC), at BFI 6:27 pm PDT (01:27 UTC) (civil twilight ends 6:58 pm PDT (01:58 UTC)). At 120 knots the arrival at BFI is after sunset there (6:29 pm PDT (01:29 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: MC Call Municipal, Boeing Fld/King County International.