Plan a flight · Sun 7:33 pm PDT (02:33 UTC)

Seattle-Tacoma International to MC Clellan Airfield SEA → MCC

529 nautical miles (609 statute miles) south on a straight line, true course 175°, about 159° magnetic at the departure end (variation 16E). At 120 knots that is 2 h 36 min at the quickest height in today's winds (24,000 ft, a 84-knot tailwind), arriving about 10:09 pm PDT (05:09 UTC), after sunset at the destination. Right now SEA is VFR, wind from the north (360°) at 7 knots; MCC is VFR, wind from the southwest (220°) at 8 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: 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 whole route.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Near the route, 239 nm along the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, 239 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 SEA.

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

B739 at 10,000 ft, 49 nm west, 6:19 pm PDT (01:19 UTC): moderate rime icing from 10,000 ft to 12,000 ft, -12 °C. 100 nm along the route, 49 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
E75L at 34,000 ft, 34 nm west, 6:25 pm PDT (01:25 UTC): moderate chop turbulence, remarks: entered by zoa fdcs. 479 nm along the route, 34 nm west of the line.
as filed, and in English
```
RNO UA /OV RBL160040/TM 0125/FL340/TP E75L/TB MOD CHOP/RM ENTERED BY ZOA FDCS
```
Report
a routine report filed through RNO
Where
40 nm south (160°) of RBL
Time
01:25 UTC
Height
at 34,000 ft
Aircraft
E75L
Turbulence
moderate chop
Remarks
entered by zoa fdcs
A321 at 13,500 ft, 27 nm east, 6:54 pm PDT (01:54 UTC): remarks: zse. 40 nm along the route, 27 nm east 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 13,000 ft, 27 nm east, 5:42 pm PDT (00:42 UTC): remarks: zse. 40 nm along the route, 27 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
PC12 at 15,000 ft, 27 nm east, 5:42 pm PDT (00:42 UTC): remarks: zse. 40 nm along the route, 27 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
B738 at 11,000 ft, 35 nm east, 6:19 pm PDT (01:19 UTC): light rime icing, remarks: during the descent runway 5. 200 nm along the route, 35 nm east of the line.
as filed, and in English
```
RDM UA /OV RDM/TM 0119/FL110/TP B738/TA UNKN/IC LGT RIME/RM DURD RWY 5
```
Report
a routine report filed through RDM
Where
over RDM
Time
01:19 UTC
Height
at 11,000 ft
Aircraft
B738
Temperature
UNKN
Icing
light rime
Remarks
during the descent runway 5
E75L at 11,000 ft, 35 nm east, 6:16 pm PDT (01:16 UTC): light rime icing, remarks: during the descent runway 29. 200 nm along the route, 35 nm east of the line.
as filed, and in English
```
RDM UA /OV RDM/TM 0116/FL110/TP E75L/TA UNKN/IC LGT RIME/RM DURD RWY 29
```
Report
a routine report filed through RDM
Where
over RDM
Time
01:16 UTC
Height
at 11,000 ft
Aircraft
E75L
Temperature
UNKN
Icing
light rime
Remarks
during the descent runway 29
E75L at 11,000 ft, 42 nm east, 5:36 pm PDT (00:36 UTC): trace to light rime icing from 10,500 ft to 11,500 ft, -8 °C, remarks: durc-zse. 200 nm along the route, 42 nm east of the line.
as filed, and in English
```
RDM UA /OV DSD090015/TM 0036/FL110/TP E75L/TA M08/IC TRACE-LGT RIME 105-115/RM DURC-ZSE
```
Report
a routine report filed through RDM
Where
15 nm east (090°) of DSD
Time
00:36 UTC
Height
at 11,000 ft
Aircraft
E75L
Temperature
−8 °C
Icing
trace-lgt rime from 10,500 ft to 11,500 ft
Remarks
durc-zse
E175 at 6,500 ft, 35 nm east, 5:28 pm PDT (00:28 UTC): a broken layer above 6,500 ft. 200 nm along the route, 35 nm east of the line.
as filed, and in English
```
RDM UA /OV RDM/TM 0028/FL065/TP E175/SK BKN065-TOPSUNKN
```
Report
a routine report filed through RDM
Where
over RDM
Time
00:28 UTC
Height
at 6,500 ft
Aircraft
E175
Sky
a broken layer from 6,500 ft, tops unknown

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 eastbound cruising heights for this course (VFR: odd thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 6 forecast points nearest it (SEA, PDX, RDM, SIY, RBL, SAC). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
3,500 ft	030° at 7 kt	−6 kt		126 kt	4 h 12 min	11:45 pm PDT (06:45 UTC)
5,500 ft	040° at 11 kt	−8 kt	0 °C	128 kt	4 h 08 min	11:41 pm PDT (06:41 UTC)
7,500 ft	030° at 12 kt	−10 kt	-1 °C	130 kt	4 h 04 min	11:37 pm PDT (06:37 UTC)
9,500 ft	020° at 16 kt	−14 kt	-6 °C	134 kt	3 h 57 min	11:30 pm PDT (06:30 UTC)
11,500 ft	010° at 22 kt	−21 kt	-8 °C	141 kt	3 h 45 min	11:18 pm PDT (06:18 UTC)
13,500 ft	010° at 33 kt	−32 kt	-11 °C	152 kt	3 h 29 min	11:02 pm PDT (06:02 UTC)
15,500 ft	010° at 46 kt	−45 kt	-13 °C	165 kt	3 h 12 min	10:45 pm PDT (05:45 UTC)
17,500 ft	360° at 59 kt	−58 kt	-15 °C	178 kt	2 h 58 min	10:31 pm PDT (05:31 UTC)
18,000 ft FL180	360° at 63 kt	−62 kt	-16 °C	182 kt	2 h 54 min	10:27 pm PDT (05:27 UTC)
24,000 ft FL240	360° at 85 kt	−84 kt	-24 °C	204 kt	2 h 36 min	10:09 pm PDT (05:09 UTC)
30,000 ft FL300	360° at 77 kt	−77 kt	-37 °C	197 kt	2 h 41 min	10:14 pm PDT (05:14 UTC)
34,000 ft FL340	350° at 42 kt	−42 kt	-40 °C	162 kt	3 h 16 min	10:49 pm PDT (05:49 UTC)
39,000 ft FL390	290° at 19 kt	−9 kt	-41 °C	129 kt	4 h 06 min	11:39 pm PDT (06:39 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
SEA	used from 0 nm out; 25 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°
PDX	used from 50 nm out; 41 nm from the line	L/V	030/7 1°	020/12 -6°	020/29 -9°	010/69 -16°	010/81 -25°	360/83 -40°	360/67 -46°	320/29 -42°
RDM	used from 150 nm out; 40 nm from the line		040/17 -1°	030/31 -8°	010/29 -12°	010/61 -19°	360/95 -25°	360/82 -36°	360/40 -37°	310/19 -40°
SIY	used from 249 nm out; 73 nm from the line		050/17 1°	010/16 -5°	360/26 -8°	360/71 -14°	360/94 -23°	360/88 -37°	350/41 -40°	290/17 -41°
RBL	used from 399 nm out; 35 nm from the line	020/16	360/6 5°	L/V -2°	340/10 -8°	360/59 -15°	360/87 -23°	360/68 -35°	330/28 -37°	260/26 -42°
SAC	used from 499 nm out; 24 nm from the line	110/6	L/V 4°	010/11 -2°	350/11 -7°	340/24 -16°	360/44 -23°	330/24 -30°	270/21 -35°	230/23 -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
SEA Seattle, WA	departure	VFR Sky: a few clouds at 3,000 feet	from the north (360°) at 7 knots	10+ mi	none	432 ft	6:53 pm PDT (01:53 UTC)
PLU Puyallup, WA	20 nm out, 1 nm southwest of the line	VFR Weather: light drizzle	calm	10+ mi	none	537 ft	02:15 UTC
TTD Portland, OR	110 nm out, 14 nm west of the line, tower	VFR Sky: a broken layer at 7,000 feet, overcast at 9,000 feet	from the east (080°) at 5 knots	10+ mi	7,000 ft	38 ft	01:53 UTC
LMT Klamath Falls, OR	319 nm out, 0 nm north of the line, tower	VFR Sky: a few clouds at 7,000 feet	from the north (350°) at 11 knots	10+ mi	none	4,095 ft	01:53 UTC
CIC Chico, CA	459 nm out, 16 nm west of the line, tower	VFR	from the south-southeast (160°) at 5 knots	10+ mi	none	240 ft	01:47 UTC
MYV Marysville, CA	499 nm out, 7 nm southwest of the line	VFR	variable at 4 knots	10+ mi	none	64 ft	19:53 UTC
MCC Sacramento, CA	destination	VFR	from the southwest (220°) at 8 knots	10+ mi	none	76 ft	7:15 pm PDT (02:15 UTC)

The highest airport on this list sits at 4,095 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At MCC when you get there the forecast at the estimated arrival, 10:09 pm PDT (05:09 UTC)

Wind from the south-southeast at 7 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for MCC

From Sun 5:00 pm PDT (00:00 UTC): wind from the southwest at 7 knots, visibility more than 6 miles, clear skies
From Sun 10:00 pm PDT (05:00 UTC): wind from the south-southeast at 7 knots, visibility more than 6 miles, clear skies
From Mon 6:00 am PDT (13:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 25,000 feet

The forecast for SEA, the departure

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

Temporary flight restrictions on the line or within 25 nm of it

6/3475 BEALE AFB, CA, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local on the route, 499 nm along the route · security · until 1 November · ZOA
6/6740 SACRAMENTO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 1 nm from the route, at the destination end · air shows/sports · ended 11 October · ZOA

Daylight

Sunset at SEA 6:27 pm PDT (01:27 UTC), at MCC 6:31 pm PDT (01:31 UTC) (civil twilight ends 6:58 pm PDT (01:58 UTC)). At 120 knots the arrival at MCC is after sunset there (6:33 pm PDT (01:33 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 now, the Pacific Southwest · 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: Seattle-Tacoma International, MC Clellan Airfield.