Nampa Municipal to Boeing Fld/King County International MAN → BFI
339 nautical miles (390 statute miles) northwest on a straight line, true course 316°, about 300° magnetic at the departure end (variation 16E). At 120 knots that is 2 h 52 min at the quickest height in today's winds (12,500 ft, a 2-knot headwind), arriving about 7:21 am PDT (14:21 UTC), after sunset at the destination. 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 TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 10 to 309 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 70 to 160 nm out.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Near the route, 130 nm along 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 MAN.
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 08:00–15:00 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 4 forecast points nearest it (BOI, 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 | 340° at 8 kt | +7 kt | 1 °C | 113 kt | 3 h | 7:29 am PDT (14:29 UTC) |
| 6,500 ft | 350° at 9 kt | +7 kt | -2 °C | 113 kt | 3 h | 7:29 am PDT (14:29 UTC) |
| 8,500 ft | 010° at 9 kt | +5 kt | -5 °C | 115 kt | 2 h 57 min | 7:26 am PDT (14:26 UTC) |
| 10,500 ft | 020° at 9 kt | +3 kt | -8 °C | 117 kt | 2 h 54 min | 7:23 am PDT (14:23 UTC) |
| 12,500 ft | 030° at 9 kt | +2 kt | -11 °C | 118 kt | 2 h 52 min | 7:21 am PDT (14:21 UTC) |
| 14,500 ft | 030° at 11 kt | +2 kt | -14 °C | 118 kt | 2 h 52 min | 7:21 am PDT (14:21 UTC) |
| 16,500 ft | 030° at 12 kt | +2 kt | -16 °C | 118 kt | 2 h 52 min | 7:21 am PDT (14:21 UTC) |
| 18,000 ft FL180 | 030° at 13 kt | +3 kt | -19 °C | 117 kt | 2 h 54 min | 7:23 am PDT (14:23 UTC) |
| 24,000 ft FL240 | 010° at 20 kt | +11 kt | -28 °C | 109 kt | 3 h 07 min | 7:36 am PDT (14:36 UTC) |
| 30,000 ft FL300 | 360° at 28 kt | +20 kt | -37 °C | 100 kt | 3 h 23 min | 7:52 am PDT (14:52 UTC) |
| 34,000 ft FL340 | 330° at 15 kt | +14 kt | -39 °C | 106 kt | 3 h 12 min | 7:41 am PDT (14:41 UTC) |
| 39,000 ft FL390 | 270° at 13 kt | +10 kt | -41 °C | 110 kt | 3 h 05 min | 7:34 am PDT (14:34 UTC) |
Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BOI | used from 0 nm out; 36 nm from the line | 320/11 1° | 280/8 -5° | 220/14 -11° | 200/60 -19° | 190/66 -31° | 210/46 -32° | 220/50 -33° | 220/43 -39° | |
| LWS | used from 100 nm out; 102 nm from the line | L/V | 340/5 -3° | L/V -6° | 040/7 -10° | 100/23 -22° | 180/30 -31° | 190/11 -34° | 200/11 -36° | 220/23 -40° |
| YKM | used from 150 nm out; 73 nm from the line | 360/6 | 360/11 -1° | 030/20 -7° | 040/21 -11° | 020/55 -18° | 010/84 -26° | 010/79 -40° | 010/45 -42° | 350/23 -42° |
| SEA | used from 299 nm out; 17 nm from the line | 350/5 | 010/6 0° | 010/9 -4° | 010/27 -6° | 010/51 -15° | 360/58 -26° | 360/60 -41° | 350/55 -48° | 340/30 -45° |
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 |
|---|---|---|---|---|---|---|---|
| MAN Nampa, ID | departure | no report just now | 2,537 ft | ||||
| ONO Ontario, OR | 30 nm out, 5 nm north of the line | no report just now | 2,193 ft | ||||
| BKE Baker City, OR | 90 nm out, 13 nm northeast of the line | no report just now | 3,373 ft | ||||
| PDT Pendleton, OR | 160 nm out, 18 nm northeast of the line, tower | no report just now | 1,494 ft | ||||
| HRI Hermiston, OR | 180 nm out, 12 nm northeast of the line | no report just now | 644 ft | ||||
| YKM Yakima, WA | 249 nm out, 7 nm northeast of the line, tower | no report just now | 1,098 ft | ||||
| PLU Puyallup, WA | 319 nm out, 19 nm southwest of the line | no report just now | 537 ft | ||||
| BFI Seattle, WA | destination | no report just now | 21 ft |
The highest airport on this list sits at 3,373 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, 7:21 am PDT (14:21 UTC)
BFI has no terminal forecast; use the nearest airport that does.
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 MAN 7:06 pm MDT (01:06 UTC), at BFI 6:25 pm PDT (01:25 UTC) (civil twilight ends 6:56 pm PDT (01:56 UTC)). At 120 knots the arrival at BFI is before sunrise there (7:23 am PDT (14:23 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: Nampa Municipal, Boeing Fld/King County International.