California Redwood Coast-Humboldt County to Seattle-Tacoma International ACV → SEA
396 nautical miles (456 statute miles) north on a straight line, true course 011°, about 354° magnetic at the departure end (variation 17E). At 120 knots that is 3 h 46 min at the quickest height in today's winds (4,500 ft, a 15-knot headwind), arriving about 10:23 pm PDT (05:23 UTC), after sunset at the destination. Right now ACV is VFR, wind from the northwest (320°) at 14 knots, gusting to 24; SEA is VFR, wind from the north (350°) at 11 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: 221 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, from 5:00 pm PDT (00:00 UTC). Over the first 376 nm of the route.
- AIRMET TANGO 2W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots), from 5:00 pm PDT (00:00 UTC). Near the route, at the departure end.
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 ACV.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B739 at 10,000 ft, 19 nm west, 6:19 pm PDT (01:19 UTC): moderate rime icing from 10,000 ft to 12,000 ft, -12 °C. 287 nm along the route, 19 nm west of the line.
as filed, and in English
PDX UA /OV 30W PDX/TM 0119/FL100/TP B739/TA M12/IC MOD RIME 120-100
- Report
- a routine report filed through PDX
- Where
- 30W pdx
- Time
- 01:19 UTC
- Height
- at 10,000 ft
- Aircraft
- B739
- Temperature
- −12 °C
- Icing
- moderate rime from 12,000 ft to 10,000 ft
- C182 at 8,000 ft, 23 nm east, 3:52 pm PDT (22:52 UTC): light rime icing, -2 °C. 297 nm along the route, 23 nm east 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, 37 nm east, 5:42 pm PDT (00:42 UTC): remarks: zse. 366 nm along the route, 37 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, 37 nm east, 5:42 pm PDT (00:42 UTC): remarks: zse. 366 nm along the route, 37 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 5 forecast points nearest it (FOT, SIY, OTH, PDX, 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 15 kt | +15 kt | 4 °C | 105 kt | 3 h 46 min | 10:23 pm PDT (05:23 UTC) |
| 6,500 ft | 020° at 17 kt | +17 kt | 1 °C | 103 kt | 3 h 51 min | 10:28 pm PDT (05:28 UTC) |
| 8,500 ft | 030° at 22 kt | +21 kt | -4 °C | 99 kt | 4 h | 10:37 pm PDT (05:37 UTC) |
| 10,500 ft | 020° at 25 kt | +24 kt | -7 °C | 96 kt | 4 h 08 min | 10:45 pm PDT (05:45 UTC) |
| 12,500 ft | 020° at 30 kt | +29 kt | -11 °C | 91 kt | 4 h 21 min | 10:58 pm PDT (05:58 UTC) |
| 14,500 ft | 020° at 42 kt | +42 kt | -13 °C | 78 kt | 5 h 05 min | 11:42 pm PDT (06:42 UTC) |
| 16,500 ft | 020° at 54 kt | +54 kt | -15 °C | 66 kt | 6 h | 12:37 am PDT (07:37 UTC) |
| 18,000 ft FL180 | 010° at 63 kt | +63 kt | -17 °C | 57 kt | 6 h 57 min | 1:34 am PDT (08:34 UTC) |
| 24,000 ft FL240 | 010° at 90 kt | +90 kt | -24 °C | 30 kt | 13 h 12 min | 7:49 am PDT (14:49 UTC) |
| 30,000 ft FL300 | 360° at 86 kt | +85 kt | -38 °C | 35 kt | 11 h 19 min | 5:56 am PDT (12:56 UTC) |
| 34,000 ft FL340 | 360° at 61 kt | +59 kt | -40 °C | 61 kt | 6 h 30 min | 1:07 am PDT (08:07 UTC) |
| 39,000 ft FL390 | 340° at 36 kt | +30 kt | -42 °C | 90 kt | 4 h 24 min | 11:01 pm PDT (06:01 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| FOT | used from 0 nm out; 50 nm from the line | 360/29 | 020/22 5° | 020/29 0° | 010/40 -5° | 010/61 -14° | 010/90 -24° | 360/81 -36° | 340/55 -38° | 320/34 -41° |
| SIY | used from 50 nm out; 64 nm from the line | 020/15 4° | 020/16 -5° | 010/11 -10° | 010/47 -18° | 360/70 -25° | 350/58 -34° | 330/46 -35° | 300/23 -40° | |
| OTH | used from 99 nm out; 38 nm from the line | 020/20 | 040/25 2° | 020/32 -4° | 010/38 -9° | 010/73 -15° | 010/98 -23° | 360/96 -38° | 360/70 -41° | 330/44 -42° |
| PDX | used from 198 nm out; 63 nm from the line | 330/7 | 360/13 0° | 040/22 -6° | 030/23 -12° | 020/64 -18° | 010/93 -25° | 010/91 -39° | 360/62 -40° | 350/41 -43° |
| SEA | used from 347 nm out; 25 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 |
|---|---|---|---|---|---|---|---|
| ACV Arcata/Eureka, CA | departure | VFR | from the northwest (320°) at 14 knots, gusting to 24 | 10+ mi | none | 222 ft | 5:53 pm PDT (00:53 UTC) |
| CEC Crescent City, CA | 50 nm out, 15 nm west of the line | VFR | from the north-northwest (340°) at 15 knots, gusting to 25 | 9 mi | none | 60 ft | 00:56 UTC |
| RBG Roseburg, OR | 139 nm out, 7 nm east of the line | VFR | from the north (360°) at 10 knots, gusting to 17 | 10+ mi | none | 533 ft | 00:53 UTC |
| EUG Eugene, OR | 188 nm out, 6 nm northeast of the line, tower | VFR Sky: scattered clouds at 4,500 feet, scattered clouds at 7,500 feet | from the north-northwest (340°) at 10 knots | 10+ mi | none | 373 ft | 00:54 UTC |
| SLE Salem, OR | 238 nm out, 4 nm northeast of the line, tower | VFR | from the north-northeast (020°) at 8 knots | 10+ mi | none | 213 ft | 00:56 UTC |
| HIO Portland, OR | 277 nm out, 3 nm northwest of the line, tower | VFR Sky: a broken layer at 10,000 feet | from the east-northeast (070°) at 9 knots | 10+ mi | 10,000 ft | 207 ft | 00:53 UTC |
| KLS Kelso, WA | 317 nm out, 8 nm west of the line | VFR | from the north-northwest (330°) at 6 knots | 10+ mi | none | 20 ft | 00:56 UTC |
| OLM Olympia, WA | 366 nm out, 18 nm west of the line, tower | VFR | from the northeast (040°) at 6 knots | 10+ mi | none | 207 ft | 00:54 UTC |
| SEA Seattle, WA | destination | VFR Sky: a few clouds at 5,000 feet | from the north (350°) at 11 knots | 10+ mi | none | 432 ft | 5:53 pm PDT (00:53 UTC) |
The highest airport on this list sits at 533 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SEA when you get there the forecast at the estimated arrival, 10:23 pm PDT (05:23 UTC)
Wind from the northeast at 6 knots, visibility more than 6 miles, clear skies VFR
The whole forecast for SEA
- From Sun 5:00 pm PDT (00:00 UTC): wind from the north at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 2,000 feet, a few clouds at 5,000 feet
- From Sun 8:00 pm PDT (03:00 UTC): wind from the northeast at 6 knots, visibility more than 6 miles, clear skies
- From Mon 3:00 am PDT (10:00 UTC): wind from the southeast at 4 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 4 knots, visibility more than 6 miles, clear skies
- From Mon 11:00 am PDT (18:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
- From Mon 8:00 pm PDT (03:00 UTC): wind from the northwest at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
The forecast for ACV, the departure
- From Sun 5:00 pm PDT (00:00 UTC): wind from the north-northwest at 18 knots, gusting to 30, visibility more than 6 miles, clear skies
- From Sun 10:00 pm PDT (05:00 UTC): wind from the north-northeast at 5 knots, visibility more than 6 miles, clear skies
- From Mon 5:00 am PDT (12:00 UTC): wind from the east-northeast at 3 knots, visibility more than 6 miles, clear skies
- From Mon 12:00 pm PDT (19:00 UTC): wind from the north-northwest at 12 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 ACV 6:40 pm PDT (01:40 UTC), at SEA 6:27 pm PDT (01:27 UTC) (civil twilight ends 6:58 pm PDT (01:58 UTC)). At 120 knots the arrival at SEA 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: California Redwood Coast-Humboldt County, Seattle-Tacoma International.