Plan a flight · Mon 1:05 am MDT (07:05 UTC)

Rifle Garfield County to Boeing Fld/King County International RIL → BFI

794 nautical miles (913 statute miles) northwest on a straight line, true course 312°, about 302° magnetic at the departure end (variation 10E). At 120 knots that is 6 h 09 min at the quickest height in today's winds (24,000 ft, a 9-knot tailwind), arriving about 6:14 am PDT (13:14 UTC), after sunset at the destination. Right now RIL is VFR, wind calm; BFI is VFR, wind from the south-southeast (160°) at 4 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: 4 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: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the first 89 nm of the route.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the first 179 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 159 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 605 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 69 to 456 nm out.
AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 69 nm along the route.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 347 to 506 nm out.
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 route from 387 to 486 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 476 to 675 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 198 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 RIL.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

urgent E75L at 9,000 ft, 44 nm southeast, 10:30 pm MDT (04:30 UTC): remarks: low-level wind shear + 20K 1000-1500 above ground on approach. At the departure end, 44 nm southeast of the line.
as filed, and in English
```
ASE UUA /OV ASE/TM 0430/FL090/TP E75L/RM LLWS +/- 20K 1000-1500 AGL ON APCH
```
Report
an urgent report filed through ASE
Where
over ASE
Time
04:30 UTC
Height
at 9,000 ft
Aircraft
E75L
Remarks
low-level wind shear + 20K 1000-1500 above ground on approach
E170 at 4,800 ft, 43 nm southwest, 12:31 am MDT (06:31 UTC): no turbulence, no icing, clear from 4,800 ft to 60,000 ft, remarks: during the descent rnav Y 11 lgjt zdvwc. At the departure end, 43 nm southwest of the line.
as filed, and in English
```
GJT UA /OV GJT/TM 0631/FL048/TP E170/SK SKC/TB NEG/IC NEG/RM DURD RNAV Y 11 LGJT. ZDVWC
```
Report
a routine report filed through GJT
Where
over GJT
Time
06:31 UTC
Height
at 4,800 ft
Aircraft
E170
Sky
clear
Turbulence
none
Icing
none
Remarks
during the descent rnav Y 11 lgjt zdvwc
E175 at 6,300 ft, 6 nm southwest, 10:20 pm MDT (04:20 UTC): overcast above 6,300 ft, remarks: during the descent runway 31. 377 nm along the route, 6 nm southwest of the line.
as filed, and in English
```
SUN UA /OV KSUN/TM 0420/FL063/TP E175/SK OVC063-TOPUNKN/RM DURD RY31
```
Report
a routine report filed through SUN
Where
over KSUN
Time
04:20 UTC
Height
at 6,300 ft
Aircraft
E175
Sky
overcast from 6,300 ft, tops unknown
Remarks
during the descent runway 31
E75L descending, 16 nm southwest, 10:35 pm MDT (04:35 UTC): light turbulence from 11,000 ft to 14,000 ft, light rime icing from 8,000 ft to 12,000 ft, -10 °C. 615 nm along the route, 16 nm southwest of the line.
as filed, and in English
```
GEG UA /OV PDT/TM 0435/FLDURD/TP E75L/TA M10/TB LT TURB 140-110/IC LT RIME 120-080
```
Report
a routine report filed through GEG
Where
over PDT
Time
04:35 UTC
Height
during the descent
Aircraft
E75L
Temperature
−10 °C
Turbulence
lt turbulence from 14,000 ft to 11,000 ft
Icing
lt rime from 12,000 ft to 8,000 ft
E75L at 1,500 ft, 9 nm northeast, 10:49 pm MDT (04:49 UTC): remarks: low-level wind shear loss of 8 knots on final. 645 nm along the route, 9 nm northeast of the line.
as filed, and in English
```
PSC UA /OV PSC120003/TM 0449/FL015/TP E75L/RM LLWS LOSS OF 8 KTS ON FINAL
```
Report
a routine report filed through PSC
Where
3 nm southeast (120°) of PSC
Time
04:49 UTC
Height
at 1,500 ft
Aircraft
E75L
Remarks
low-level wind shear loss of 8 knots on final

Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 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 8 forecast points nearest it (GJT, RKS, SLC, PIH, 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	050° at 4 kt	−2 kt	2 °C	122 kt	6 h 30 min	6:35 am PDT (13:35 UTC)
6,500 ft	040° at 5 kt	−1 kt	-1 °C	121 kt	6 h 34 min	6:39 am PDT (13:39 UTC)
8,500 ft	210° at 7 kt	−2 kt	-4 °C	122 kt	6 h 30 min	6:35 am PDT (13:35 UTC)
10,500 ft	220° at 9 kt	0	-5 °C	120 kt	6 h 37 min	6:42 am PDT (13:42 UTC)
12,500 ft	220° at 12 kt	0	-6 °C	120 kt	6 h 37 min	6:42 am PDT (13:42 UTC)
14,500 ft	220° at 16 kt	−2 kt	-10 °C	122 kt	6 h 30 min	6:35 am PDT (13:35 UTC)
16,500 ft	210° at 20 kt	−3 kt	-14 °C	123 kt	6 h 27 min	6:32 am PDT (13:32 UTC)
18,000 ft FL180	210° at 23 kt	−4 kt	-16 °C	124 kt	6 h 24 min	6:29 am PDT (13:29 UTC)
24,000 ft FL240	200° at 30 kt	−9 kt	-27 °C	129 kt	6 h 09 min	6:14 am PDT (13:14 UTC)
30,000 ft FL300	220° at 33 kt	+1 kt	-32 °C	119 kt	6 h 40 min	6:45 am PDT (13:45 UTC)
34,000 ft FL340	230° at 37 kt	+6 kt	-36 °C	114 kt	6 h 58 min	7:03 am PDT (14:03 UTC)
39,000 ft FL390	230° at 39 kt	+5 kt	-42 °C	115 kt	6 h 54 min	6:59 am PDT (13:59 UTC)

Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 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
GJT	used from 0 nm out; 45 nm from the line			210/43 7°	230/45 1°	220/49 -12°	220/62 -22°	220/59 -28°	230/60 -33°	220/55 -45°
RKS	used from 50 nm out; 75 nm from the line			200/41	220/44 1°	220/35 -11°	220/46 -24°	210/53 -27°	220/62 -35°	230/61 -44°
SLC	used from 198 nm out; 74 nm from the line		200/5	230/8 2°	220/20 -2°	210/40 -12°	190/53 -25°	210/62 -30°	220/69 -34°	220/64 -43°
PIH	used from 248 nm out; 29 nm from the line		L/V	240/13 1°	240/15 -3°	210/42 -15°	200/70 -25°	220/74 -29°	220/71 -36°	220/62 -43°
BOI	used from 397 nm out; 60 nm from the line		300/7 2°	280/5 -4°	210/16 -9°	210/60 -20°	210/75 -29°	210/63 -32°	220/64 -32°	220/54 -39°
LWS	used from 496 nm out; 83 nm from the line	070/10	080/12 -2°	030/12 -6°	080/7 -10°	170/34 -21°	160/46 -32°	200/33 -35°	220/22 -35°	230/18 -38°
YKM	used from 645 nm out; 34 nm from the line	070/10	040/15 -1°	020/27 -8°	030/25 -13°	020/48 -20°	010/83 -27°	010/77 -37°	010/49 -40°	350/14 -41°
SEA	used from 744 nm out; 23 nm from the line	050/7	050/11 1°	050/12 -5°	030/31 -7°	010/61 -15°	010/69 -26°	360/73 -40°	360/62 -47°	330/21 -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
RIL Rifle, CO	departure	VFR Sky: a broken layer at 7,000 feet, overcast at 8,500 feet Weather: light rain	calm	10+ mi	7,000 ft	5,536 ft	12:53 am MDT (06:53 UTC)
EEO Meeker, CO	30 nm out, 19 nm northeast of the line	VFR	calm	10+ mi	none	6,415 ft	06:53 UTC
VEL Vernal, UT	99 nm out, 13 nm southwest of the line	VFR Sky: scattered clouds at 4,000 feet, overcast at 6,000 feet Weather: light rain	from the south-southwest (210°) at 10 knots	10+ mi	6,000 ft	5,274 ft	06:53 UTC
FBR Fort Bridger, WY	169 nm out, 5 nm east of the line	VFR Sky: scattered clouds at 6,000 feet, a broken layer at 7,000 feet, overcast at 8,500 feet	from the west (270°) at 9 knots	10+ mi	7,000 ft	7,038 ft	06:55 UTC
PIH Pocatello, ID	298 nm out, 12 nm northeast of the line, tower	marginal VFR Sky: overcast at 2,600 feet	calm	10+ mi	2,600 ft	4,451 ft	06:53 UTC
SUN Hailey, ID	377 nm out, 6 nm southwest of the line, tower	low IFR Sky: overcast at 400 feet	from the south-southeast (160°) at 7 knots	10+ mi	400 ft	5,319 ft	06:55 UTC
JSY Joseph, OR	546 nm out, 8 nm north of the line	VFR	from the south-southwest (210°) at 4 knots	10+ mi	none	4,126 ft	14:30 UTC
PDT Pendleton, OR	615 nm out, 14 nm southwest of the line, tower	VFR Sky: overcast at 6,500 feet	from the south (180°) at 3 knots	10+ mi	6,500 ft	1,494 ft	06:53 UTC
PSC Pasco, WA	645 nm out, 8 nm northeast of the line, tower	VFR Sky: overcast at 8,500 feet	variable at 3 knots	10+ mi	8,500 ft	410 ft	06:53 UTC
ESW Easton, WA	744 nm out, 11 nm north of the line	no report just now				2,226 ft
BFI Seattle, WA	destination	VFR	from the south-southeast (160°) at 4 knots	10+ mi	none	21 ft	11:53 pm PDT (06:53 UTC)

The highest airport on this list sits at 7,038 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, 6:14 am PDT (13:14 UTC)

Wind calm, visibility more than 6 miles, patches of fog, clear skies VFR

The whole forecast for BFI

From Sun 11:00 pm PDT (06:00 UTC): wind calm, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind calm, 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
From Mon 7:00 pm PDT (02:00 UTC): wind calm, visibility more than 6 miles, clear skies

The forecast for RIL, the departure

From Mon 12:00 am MDT (06:00 UTC): wind from the east at 7 knots, visibility more than 6 miles, low-level wind shear, scattered clouds at 7,000 feet, a broken layer at 10,000 feet
At times between Mon 12:00 am MDT (06:00 UTC) and 4:00 am MDT (10:00 UTC): visibility 4 miles, light rain showers, a broken layer at 4,500 feet
From Mon 6:00 am MDT (12:00 UTC): wind from the southeast at 7 knots, visibility more than 6 miles, scattered clouds at 4,000 feet, a broken layer at 6,000 feet
30% chance between Mon 6:00 am MDT (12:00 UTC) and 12:00 pm MDT (18:00 UTC): visibility 4 miles, light rain showers, a broken layer at 4,000 feet
From Mon 12:00 pm MDT (18:00 UTC): wind from the west-northwest at 10 knots, gusting to 20, visibility more than 6 miles, a broken layer at 5,000 feet
From Mon 4:00 pm MDT (22:00 UTC): wind from the west-southwest at 9 knots, visibility more than 6 miles, a few clouds at 6,000 feet, scattered clouds at 9,000 feet
30% chance between Mon 7:00 pm MDT (01:00 UTC) and 9:00 pm MDT (03:00 UTC): visibility 4 miles, light rain showers, a broken layer at 6,000 feet
From Mon 9:00 pm MDT (03:00 UTC): wind from the southeast at 8 knots, visibility more than 6 miles, light rain showers, a broken layer at 6,000 feet
30% chance between Mon 9:00 pm MDT (03:00 UTC) and 12:00 am MDT (06:00 UTC): visibility 4 miles, light rain showers, a broken layer at 4,500 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 RIL 6:35 pm MDT (00:35 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

Radar now, the southern Rockies · loop National Weather Service

Radar now, the northern Rockies · loop National Weather Service

Radar now, the Pacific Northwest · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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: Rifle Garfield County, Boeing Fld/King County International.