Southwest Washington Regional to Boeing Fld/King County International KLS → BFI
88 nautical miles (102 statute miles) north on a straight line, true course 016°, about 359° magnetic at the departure end (variation 17E). At 120 knots that is 48 min at the quickest height in today's winds (4,500 ft, a 11-knot headwind), arriving about 6:44 pm PDT (01:44 UTC), after sunset at the destination. Right now KLS is VFR, wind from the north (350°) at 8 knots, gusting to 16; 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: 2 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 whole 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 KLS.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- E75L at 10,000 ft, 21 nm east, 3:04 pm PDT (22:04 UTC): moderate rime icing, -9 °C, remarks: from 10,000 ft to 7,500 ft during the descent. At the departure end, 21 nm east of the line.
as filed, and in English
PDX UA /OV PDX360025/TM 2204/FL100/TP E75L/TA M9/IC MOD RIME /RM 100-075 DURD
- Report
- a routine report filed through PDX
- Where
- 25 nm north (360°) of PDX
- Time
- 22:04 UTC
- Height
- at 10,000 ft
- Aircraft
- E75L
- Temperature
- −9 °C
- Icing
- moderate rime
- Remarks
- from 10,000 ft to 7,500 ft during the descent
- C182 at 8,000 ft, 35 nm southeast, 3:52 pm PDT (22:52 UTC): light rime icing, -2 °C. At the departure end, 35 nm southeast of the line.
as filed, and in English
PDX UA /OV PDX040017/TM 2252/FL080/TP C182/TA M02/IC LGT RIME
- Report
- a routine report filed through PDX
- Where
- 17 nm northeast (040°) of PDX
- Time
- 22:52 UTC
- Height
- at 8,000 ft
- Aircraft
- C182
- Temperature
- −2 °C
- Icing
- light rime
- PC12 at 15,000 ft, 40 nm east, 5:42 pm PDT (00:42 UTC): remarks: zse. 59 nm along the route, 40 nm east of the line.
as filed, and in English
YKM UA /OV YKM270050/TM 0042/FL150/TP PC12/SK TOP130/RM -ZSE
- Report
- a routine report filed through YKM
- Where
- 50 nm west (270°) of YKM
- Time
- 00:42 UTC
- Height
- at 15,000 ft
- Aircraft
- PC12
- Sky
- TOP130
- Remarks
- zse
- PC12 at 13,000 ft, 40 nm east, 5:42 pm PDT (00:42 UTC): remarks: zse. 59 nm along the route, 40 nm east of the line.
as filed, and in English
YKM UA /OV YKM270050/TM 0042/FL130/TP PC12/SK TOP130/RM -ZSE
- Report
- a routine report filed through YKM
- Where
- 50 nm west (270°) of YKM
- Time
- 00:42 UTC
- Height
- at 13,000 ft
- Aircraft
- PC12
- Sky
- TOP130
- 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 2 forecast points nearest it (AST, 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 | 010° at 11 kt | +11 kt | 109 kt | 48 min | 6:44 pm PDT (01:44 UTC) | |
| 6,500 ft | 020° at 13 kt | +13 kt | 1 °C | 107 kt | 49 min | 6:45 pm PDT (01:45 UTC) |
| 8,500 ft | 020° at 16 kt | +16 kt | -3 °C | 104 kt | 51 min | 6:47 pm PDT (01:47 UTC) |
| 10,500 ft | 020° at 22 kt | +22 kt | -7 °C | 98 kt | 54 min | 6:50 pm PDT (01:50 UTC) |
| 12,500 ft | 020° at 29 kt | +29 kt | -10 °C | 91 kt | 58 min | 6:54 pm PDT (01:54 UTC) |
| 14,500 ft | 020° at 41 kt | +41 kt | -12 °C | 79 kt | 1 h 07 min | 7:03 pm PDT (02:03 UTC) |
| 16,500 ft | 010° at 53 kt | +53 kt | -15 °C | 67 kt | 1 h 19 min | 7:15 pm PDT (02:15 UTC) |
| 18,000 ft FL180 | 010° at 62 kt | +62 kt | -16 °C | 58 kt | 1 h 31 min | 7:27 pm PDT (02:27 UTC) |
| 24,000 ft FL240 | 010° at 85 kt | +84 kt | -25 °C | 36 kt | 2 h 27 min | 8:23 pm PDT (03:23 UTC) |
| 30,000 ft FL300 | 360° at 89 kt | +86 kt | -39 °C | 34 kt | 2 h 35 min | 8:31 pm PDT (03:31 UTC) |
| 34,000 ft FL340 | 360° at 69 kt | +68 kt | -43 °C | 52 kt | 1 h 42 min | 7:38 pm PDT (02:38 UTC) |
| 39,000 ft FL390 | 350° at 32 kt | +30 kt | -44 °C | 90 kt | 59 min | 6:55 pm PDT (01:55 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| AST | used from 0 nm out; 52 nm from the line | 020/11 | 030/15 2° | 020/23 -4° | 010/32 -8° | 010/64 -16° | 010/84 -25° | 360/89 -39° | 360/71 -44° | 350/33 -45° |
| SEA | used from 49 nm out; 15 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 |
|---|---|---|---|---|---|---|---|
| KLS Kelso, WA | departure | VFR | from the north (350°) at 8 knots, gusting to 16 | 10+ mi | none | 20 ft | 4:56 pm PDT (23:56 UTC) |
| TDO Toledo, WA | 20 nm out, 3 nm northwest of the line | no report just now | 373 ft | ||||
| TIW Tacoma, WA | 69 nm out, 7 nm northwest of the line, tower | VFR | from the north-northeast (030°) at 8 knots | 10+ mi | none | 294 ft | 23:53 UTC |
| 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 373 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, 6:44 pm PDT (01:44 UTC)
Wind from the north-northwest at 8 knots, gusting to 18, visibility more than 6 miles, a few clouds at 5,000 feet 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
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 KLS 6:31 pm PDT (01:31 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: Southwest Washington Regional, Boeing Fld/King County International.