Plan a flight · Sun 7:42 pm PDT (02:42 UTC)

Walla Walla Regional to Seattle Paine Field International ALW → PAE

197 nautical miles (226 statute miles) northwest on a straight line, true course 305°, about 291° magnetic at the departure end (variation 14E). At 120 knots that is 1 h 35 min at the quickest height in today's winds (4,500 ft, a 4-knot tailwind), arriving about 9:17 pm PDT (04:17 UTC), after sunset at the destination. Right now ALW is VFR, wind from the south-southwest (210°) at 4 knots; PAE is VFR, wind calm. 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: 5 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 ZULU 2C: moderate icing up to 16,000 ft. Over the first 88 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 10 nm of the route.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 147 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 ALW.

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

PC12 at 6,000 ft, 15 nm southwest, 5:56 pm PDT (00:56 UTC): overcast above 6,000 ft. At the departure end, 15 nm southwest of the line.
as filed, and in English
```
ALW UA /OV ALW200015/TM 0056/FL060/TP PC12/SK OVC060
```
Report
a routine report filed through ALW
Where
15 nm south (200°) of ALW
Time
00:56 UTC
Height
at 6,000 ft
Aircraft
PC12
Sky
overcast from 6,000 ft
PC12 at 13,500 ft, 13 nm north, 6:08 pm PDT (01:08 UTC): no turbulence, a trace of icing, overcast from 9,000 ft to 13,500 ft, -10 °C. 39 nm along the route, 13 nm north of the line.
as filed, and in English
```
PSC UA /OV PSC360025/TM 0108/FL135/TP PC12/SK OVC090-TOP135/TA M10/TB NEG /IC TRACE RM 135-090
```
Report
a routine report filed through PSC
Where
25 nm north (360°) of PSC
Time
01:08 UTC
Height
at 13,500 ft
Aircraft
PC12
Sky
overcast from 9,000 ft, tops 13,500 ft
Temperature
−10 °C
Turbulence
none
Icing
trace remarks from 13,500 ft to 9,000 ft
C337 at 12,000 ft, 43 nm southwest, 6:18 pm PDT (01:18 UTC): light rime icing, -12 °C, remarks: zse. 79 nm along the route, 43 nm southwest of the line.
as filed, and in English
```
YKM UA /OV YKM155020/TM 0118/FL120/TP C337/TA M12/IC LGT RIME/RM ZSE
```
Report
a routine report filed through YKM
Where
20 nm southeast (155°) of YKM
Time
01:18 UTC
Height
at 12,000 ft
Aircraft
C337
Temperature
−12 °C
Icing
light rime
Remarks
zse
A321 at 13,500 ft, 38 nm southwest, 6:54 pm PDT (01:54 UTC): remarks: zse. 138 nm along the route, 38 nm southwest of the line.
as filed, and in English
```
SEA UA /OV SEA120045/TM 0154/FL135/TP A321/SK TOP130/RM ZSE
```
Report
a routine report filed through SEA
Where
45 nm southeast (120°) of SEA
Time
01:54 UTC
Height
at 13,500 ft
Aircraft
A321
Sky
TOP130
Remarks
zse
PC12 at 15,000 ft, 38 nm southwest, 5:42 pm PDT (00:42 UTC): remarks: zse. 138 nm along the route, 38 nm southwest 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, 38 nm southwest, 5:42 pm PDT (00:42 UTC): remarks: zse. 138 nm along the route, 38 nm southwest 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
SB20 at 16,000 ft, 21 nm northeast, 6:52 pm PDT (01:52 UTC): remarks: zse. 157 nm along the route, 21 nm northeast of the line.
as filed, and in English
```
PAE UA /OV PAE075045/TM 0152/FL160/TP SB20/SK TOP120/RM ZSE
```
Report
a routine report filed through PAE
Where
45 nm east (075°) of PAE
Time
01:52 UTC
Height
at 16,000 ft
Aircraft
SB20
Sky
TOP120
Remarks
zse

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 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	060° at 11 kt	−4 kt		124 kt	1 h 35 min	9:17 pm PDT (04:17 UTC)
6,500 ft	050° at 14 kt	−3 kt	-2 °C	123 kt	1 h 36 min	9:18 pm PDT (04:18 UTC)
8,500 ft	030° at 18 kt	+2 kt	-6 °C	118 kt	1 h 40 min	9:22 pm PDT (04:22 UTC)
10,500 ft	030° at 20 kt	+1 kt	-8 °C	119 kt	1 h 39 min	9:21 pm PDT (04:21 UTC)
12,500 ft	030° at 22 kt	+1 kt	-12 °C	119 kt	1 h 39 min	9:21 pm PDT (04:21 UTC)
14,500 ft	030° at 26 kt	+2 kt	-14 °C	118 kt	1 h 40 min	9:22 pm PDT (04:22 UTC)
16,500 ft	020° at 29 kt	+4 kt	-17 °C	116 kt	1 h 42 min	9:24 pm PDT (04:24 UTC)
18,000 ft FL180	020° at 32 kt	+6 kt	-19 °C	114 kt	1 h 44 min	9:26 pm PDT (04:26 UTC)
24,000 ft FL240	020° at 49 kt	+14 kt	-28 °C	106 kt	1 h 52 min	9:34 pm PDT (04:34 UTC)
30,000 ft FL300	360° at 49 kt	+23 kt	-37 °C	97 kt	2 h 02 min	9:44 pm PDT (04:44 UTC)
34,000 ft FL340	360° at 35 kt	+19 kt	-40 °C	101 kt	1 h 57 min	9:39 pm PDT (04:39 UTC)
39,000 ft FL390	320° at 11 kt	+11 kt	-41 °C	109 kt	1 h 48 min	9:30 pm PDT (04:30 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
LWS	used from 0 nm out; 73 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 49 nm out; 35 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 147 nm out; 26 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
ALW Walla Walla, WA	departure	VFR Sky: scattered clouds at 5,500 feet, overcast at 8,000 feet	from the south-southwest (210°) at 4 knots	10+ mi	8,000 ft	1,194 ft	6:53 pm PDT (01:53 UTC)
PSC Pasco, WA	39 nm out, 12 nm south of the line, tower	VFR Sky: overcast at 9,000 feet	from the north (010°) at 7 knots	10+ mi	9,000 ft	410 ft	01:53 UTC
ELN Ellensburg, WA	108 nm out, 5 nm southwest of the line	VFR Sky: overcast at 9,000 feet	from the northeast (040°) at 7 knots	10+ mi	9,000 ft	1,763 ft	01:53 UTC
RNT Renton, WA	177 nm out, 20 nm southwest of the line, tower	VFR	from the north (350°) at 10 knots	10+ mi	none	32 ft	01:53 UTC
PAE Everett, WA	destination	VFR	calm	10+ mi	none	606 ft	6:53 pm PDT (01:53 UTC)

The highest airport on this list sits at 1,763 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At PAE when you get there the forecast at the estimated arrival, 9:17 pm PDT (04:17 UTC)

Wind from the north at 3 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for PAE

From Sun 5:00 pm PDT (00:00 UTC): wind from the northwest at 10 knots, gusting to 19, visibility more than 6 miles, clear skies
From Sun 7:00 pm PDT (02:00 UTC): wind from the north at 3 knots, visibility more than 6 miles, clear skies
From Mon 1:00 am PDT (08:00 UTC): wind light and variable, visibility more than 6 miles, patches of fog, clear skies
From Mon 10:00 am PDT (17:00 UTC): wind from the east-southeast at 3 knots, visibility more than 6 miles, clear skies
From Mon 1:00 pm PDT (20:00 UTC): wind from the northwest at 3 knots, visibility more than 6 miles, clear skies

The forecast for ALW, the departure

From Sun 5:00 pm PDT (00:00 UTC): wind from the north at 9 knots, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 8,000 feet
From Sun 8:00 pm PDT (03:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 10,000 feet
From Mon 12:00 pm PDT (19:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 10,000 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 ALW 6:12 pm PDT (01:12 UTC), at PAE 6:26 pm PDT (01:26 UTC) (civil twilight ends 6:57 pm PDT (01:57 UTC)). At 120 knots the arrival at PAE is after sunset there (6:28 pm PDT (01:28 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 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: Walla Walla Regional, Seattle Paine Field International.