Plan a flight · Sun 8:53 pm CDT (01:53 UTC)

Green Bay/Austin Straubel International to Seattle-Tacoma International GRB → SEA

1,426 nautical miles (1,641 statute miles) west on a straight line, true course 289°, about 291° magnetic at the departure end (variation 2W). At 120 knots that is 11 h 19 min at the quickest height in today's winds (4,500 ft, a 6-knot tailwind), arriving about 6:12 am PDT (13:12 UTC), after sunset at the destination. Right now GRB is VFR, wind from the south (190°) at 6 knots; 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: 2 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 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 349 to 449 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 568 to 1137 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 588 to 1157 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 897 to 1187 nm out.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 937 to 1316 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 160 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 GRB.

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

CRJ9 at 18,000 ft, 5 nm south, 8:48 pm CDT (01:48 UTC): no turbulence. 70 nm along the route, 5 nm south of the line.
as filed, and in English
```
CWA UA /OV CWA/TM 0148/FL180/TP CRJ9/TB NEG
```
Report
a routine report filed through CWA
Where
over CWA
Time
01:48 UTC
Height
at 18,000 ft
Aircraft
CRJ9
Turbulence
none
CRJ7 at 18,000 ft, 32 nm north, 6:41 pm CDT (23:41 UTC): light rime icing from 18,000 ft to 20,000 ft, -13 °C, remarks: during the descent. 339 nm along the route, 32 nm north of the line.
as filed, and in English
```
FAR UA /OV FAR090050/TM 2341/FL180/TP CRJ7/SK BASE180-TOP200/TA M13/IC LGT RIME 180-200/RM DURD
```
Report
a routine report filed through FAR
Where
50 nm east (090°) of FAR
Time
23:41 UTC
Height
at 18,000 ft
Aircraft
CRJ7
Sky
BASE180-TOP200
Temperature
−13 °C
Icing
light rime from 18,000 ft to 20,000 ft
Remarks
during the descent
A320 descending, 38 nm north, 8:01 pm CDT (01:01 UTC): overcast above 1,200 ft, remarks: during the descent runway 36. 389 nm along the route, 38 nm north of the line.
as filed, and in English
```
FAR UA /OV KFAR/TM 0101/FLUNKN/TP A320/SK OVC012-TOPUNKN/RM DURD RWY 36
```
Report
a routine report filed through FAR
Where
over KFAR
Time
01:01 UTC
Height
height not given
Aircraft
A320
Sky
overcast from 1,200 ft, tops unknown
Remarks
during the descent runway 36
C56X at 1,300 ft, 38 nm north, 6:17 pm CDT (23:17 UTC): overcast above 1,300 ft. 389 nm along the route, 38 nm north of the line.
as filed, and in English
```
FAR UA /OV KFAR/TM 2317/FL013/TP C56X/SK OVC013
```
Report
a routine report filed through FAR
Where
over KFAR
Time
23:17 UTC
Height
at 1,300 ft
Aircraft
C56X
Sky
overcast from 1,300 ft
CRJ2 at 11,000 ft, 23 nm north, 7:53 pm CDT (00:53 UTC): no turbulence, no icing. 469 nm along the route, 23 nm north of the line.
as filed, and in English
```
JMS UA /OV JMS/TM 0053/FL110/TP CRJ2/SK BASE020-TOP040/TB NEG/IC NEG
```
Report
a routine report filed through JMS
Where
over JMS
Time
00:53 UTC
Height
at 11,000 ft
Aircraft
CRJ2
Sky
BASE020-TOP040
Turbulence
none
Icing
none
PC12 at 16,000 ft, 45 nm north, 7:12 pm CDT (00:12 UTC): light icing, -6 °C. 479 nm along the route, 45 nm north of the line.
as filed, and in English
```
JMS UA /OV JMS332028/TM 0012/FL160/TP PC12/TA M06/IC LGT CLR
```
Report
a routine report filed through JMS
Where
28 nm northwest (332°) of JMS
Time
00:12 UTC
Height
at 16,000 ft
Aircraft
PC12
Temperature
−6 °C
Icing
light clear
CRJ2 at 2,900 ft, 12 nm south, 7:05 pm CDT (00:05 UTC): a routine report with nothing remarked on. 628 nm along the route, 12 nm south of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 0005/FL029/TP CRJ2/SK BASE029
```
Report
a routine report filed through DIK
Where
over DIK
Time
00:05 UTC
Height
at 2,900 ft
Aircraft
CRJ2
Sky
BASE029
B38M at 32,000 ft, 40 nm north, 6:12 pm CDT (23:12 UTC): light chop turbulence. 628 nm along the route, 40 nm north of the line.
as filed, and in English
```
MOT UA /OV MOT225061/TM 2312/FL320/TP B38M/TB CONS LGT CHOP
```
Report
a routine report filed through MOT
Where
61 nm southwest (225°) of MOT
Time
23:12 UTC
Height
at 32,000 ft
Aircraft
B38M
Turbulence
continuous light chop
BE20 at 3,000 ft, 12 nm south, 5:56 pm CDT (22:56 UTC): no turbulence, no icing. 628 nm along the route, 12 nm south of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 2256/FL030/TP BE20/SK BASE031/TB NEG/IC NEG
```
Report
a routine report filed through DIK
Where
over DIK
Time
22:56 UTC
Height
at 3,000 ft
Aircraft
BE20
Sky
BASE031
Turbulence
none
Icing
none
BCS1 at 3,700 ft, 48 nm south, 8:47 pm CDT (01:47 UTC): snow, rain, remarks: during the descent ils runway 12. 1097 nm along the route, 48 nm south of the line.
as filed, and in English
```
MSO UA /OV MSO/TM 0147/FL037/TP BCS1/SK 037/WX SN RA/RM DURD ILS RY 12
```
Report
a routine report filed through MSO
Where
over MSO
Time
01:47 UTC
Height
at 3,700 ft
Aircraft
BCS1
Sky
at 3,700 ft
Weather
snow, rain
Remarks
during the descent ils runway 12
E75L descending, 37 nm north, 8:06 pm CDT (01:06 UTC): overcast above 4,000 ft. 1097 nm along the route, 37 nm north of the line.
as filed, and in English
```
GPI UA /OV KGPI/TM 0106/FLDURD/TP E75L/SK OVC040
```
Report
a routine report filed through GPI
Where
over KGPI
Time
01:06 UTC
Height
during the descent
Aircraft
E75L
Sky
overcast from 4,000 ft
C25B at 4,100 ft, 48 nm south, 7:36 pm CDT (00:36 UTC): no icing, overcast above 4,100 ft, remarks: during the descent ils runway 12. 1097 nm along the route, 48 nm south of the line.
as filed, and in English
```
MSO UA /OV MSO/TM 0036/FL041/TP C25B/SK OVC041/IC NEG/RM DURD ILS RY 12
```
Report
a routine report filed through MSO
Where
over MSO
Time
00:36 UTC
Height
at 4,100 ft
Aircraft
C25B
Sky
overcast from 4,100 ft
Icing
none
Remarks
during the descent ils runway 12
PC12 at 13,000 ft, 38 nm south, 7:42 pm CDT (00:42 UTC): remarks: zse. At the destination end, 38 nm south 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, 38 nm south, 7:42 pm CDT (00:42 UTC): remarks: zse. At the destination end, 38 nm south 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

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 14 forecast points nearest it (GRB, LSE, MSP, AXN, ABR, MOT, DIK, MLS, GGW, GTF, GPI, GEG, 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	090° at 5 kt	−6 kt	1 °C	126 kt	11 h 19 min	6:12 am PDT (13:12 UTC)
6,500 ft	120° at 3 kt	−4 kt	7 °C	124 kt	11 h 30 min	6:23 am PDT (13:23 UTC)
8,500 ft	180° at 4 kt	−1 kt	4 °C	121 kt	11 h 47 min	6:40 am PDT (13:40 UTC)
10,500 ft	220° at 7 kt	+2 kt	0 °C	118 kt	12 h 05 min	6:58 am PDT (13:58 UTC)
12,500 ft	230° at 11 kt	+6 kt	-3 °C	114 kt	12 h 31 min	7:24 am PDT (14:24 UTC)
14,500 ft	230° at 14 kt	+9 kt	-7 °C	111 kt	12 h 51 min	7:44 am PDT (14:44 UTC)
16,500 ft	230° at 18 kt	+12 kt	-11 °C	108 kt	13 h 12 min	8:05 am PDT (15:05 UTC)
18,000 ft FL180	240° at 20 kt	+14 kt	-14 °C	106 kt	13 h 27 min	8:20 am PDT (15:20 UTC)
24,000 ft FL240	240° at 29 kt	+24 kt	-23 °C	96 kt	14 h 51 min	9:44 am PDT (16:44 UTC)
30,000 ft FL300	250° at 40 kt	+34 kt	-37 °C	86 kt	16 h 35 min	11:28 am PDT (18:28 UTC)
34,000 ft FL340	250° at 45 kt	+41 kt	-44 °C	79 kt	18 h 03 min	12:56 pm PDT (19:56 UTC)
39,000 ft FL390	260° at 54 kt	+52 kt	-49 °C	68 kt	20 h 58 min	3:51 pm PDT (22:51 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
GRB	used from 0 nm out; 25 nm from the line	240/24	260/18 16°	270/20 11°	290/14 4°	280/24 -9°	300/34 -21°	310/51 -38°	310/54 -48°	300/71 -51°
LSE	used from 100 nm out; 77 nm from the line	220/33	250/29 17°	250/15 9°	260/12 6°	280/21 -9°	280/33 -20°	300/43 -36°	310/56 -45°	300/79 -53°
MSP	used from 150 nm out; 59 nm from the line	200/28	240/30 19°	240/24 12°	240/17 5°	270/24 -10°	270/33 -20°	280/48 -35°	290/55 -45°	280/84 -54°
AXN	used from 249 nm out; 45 nm from the line	L/V	220/23 17°	230/24 12°	240/25 5°	260/32 -11°	260/40 -21°	270/50 -35°	270/57 -45°	270/81 -55°
ABR	used from 399 nm out; 64 nm from the line	030/24	220/5 16°	230/18 12°	230/32 5°	240/38 -10°	250/37 -20°	240/40 -35°	240/56 -44°	250/72 -52°
MOT	used from 499 nm out; 100 nm from the line		070/8 6°	180/7 2°	220/18 -1°	240/37 -11°	250/55 -20°	250/64 -36°	250/70 -46°	250/80 -54°
DIK	used from 548 nm out; 59 nm from the line		110/15 6°	200/17 5°	230/31 1°	240/47 -10°	240/52 -20°	230/52 -36°	240/57 -45°	250/67 -51°
MLS	used from 698 nm out; 63 nm from the line		120/22 5°	170/18 4°	200/33 1°	230/49 -10°	230/58 -21°	220/54 -37°	230/64 -44°	250/74 -49°
GGW	used from 748 nm out; 53 nm from the line		090/18 0°	140/12 -2°	150/13 -3°	200/35 -12°	230/56 -22°	240/75 -37°	240/81 -46°	240/78 -49°
GTF	used from 897 nm out; 61 nm from the line		070/21	080/18 -6°	120/5 -5°	180/30 -14°	200/53 -24°	210/80 -38°	220/83 -44°	230/68 -46°
GPI	used from 1047 nm out; 46 nm from the line		060/19 -3°	110/11 -8°	130/6 -8°	200/40 -19°	190/58 -28°	200/101 -39°	220/73 -43°	230/41 -43°
GEG	used from 1147 nm out; 60 nm from the line		050/18 -2°	060/19 -8°	L/V -11°	160/11 -24°	190/17 -31°	200/19 -35°	220/14 -37°	250/11 -41°
YKM	used from 1296 nm out; 70 nm from the line	030/16	020/18 0°	030/30 -8°	030/23 -13°	020/40 -23°	010/73 -29°	010/54 -36°	360/29 -37°	330/16 -40°
SEA	used from 1346 nm out; 55 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
GRB Green Bay, WI	departure	VFR	from the south (190°) at 6 knots	10+ mi	none	695 ft	7:53 pm CDT (00:53 UTC)
CWA Mosinee, WI	70 nm out, 5 nm south of the line, tower	VFR	from the south (180°) at 7 knots	10+ mi	none	1,277 ft	01:50 UTC
STC St Cloud, MN	259 nm out, 14 nm south of the line, tower	VFR	from the north-northwest (340°) at 4 knots	10+ mi	none	1,030 ft	00:53 UTC
BWP Wahpeton, ND	369 nm out, 4 nm west of the line	VFR	from the north (360°) at 16 knots, gusting to 23	10+ mi	none	968 ft	23:35 UTC
BIS Bismarck, ND	548 nm out, 4 nm south of the line, tower	marginal VFR Sky: overcast at 1,200 feet	from the north-northeast (030°) at 13 knots	10+ mi	1,200 ft	1,661 ft	00:52 UTC
DIK Dickinson, ND	628 nm out, 16 nm south of the line	IFR Sky: overcast at 500 feet Weather: light rain	from the northeast (050°) at 14 knots, gusting to 20	10+ mi	500 ft	2,592 ft	01:41 UTC
GDV Glendive, MT	718 nm out, 8 nm south of the line	low IFR Sky: overcast at 400 feet Weather: light rain, mist	from the northeast (040°) at 15 knots	6 mi	400 ft	2,458 ft	00:56 UTC
GTF Great Falls, MT	987 nm out, 11 nm southeast of the line, tower	low IFR Sky: a broken layer at 400 feet, overcast at 800 feet Weather: light snow, mist	from the north-northeast (020°) at 10 knots	0.75 mi	400 ft	3,680 ft	01:08 UTC
THM Thompson Falls, MT	1137 nm out, 8 nm southwest of the line	no report just now				2,467 ft
SFF Spokane, WA	1226 nm out, 3 nm east of the line, tower	VFR Sky: overcast at 6,500 feet	from the northeast (050°) at 12 knots, gusting to 19	10+ mi	6,500 ft	1,956 ft	00:53 UTC
MWH Moses Lake, WA	1306 nm out, 24 nm south of the line, tower	VFR Sky: overcast at 10,000 feet	from the northeast (050°) at 13 knots, gusting to 18	10+ mi	10,000 ft	1,188 ft	00:52 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 3,680 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, 6:12 am PDT (13:12 UTC)

Wind from the southeast at 4 knots, visibility more than 6 miles, patches of fog, 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 GRB, the departure

From Sun 7:00 pm CDT (00:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, clear skies
From Sun 9:00 pm CDT (02:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, low-level wind shear, clear skies
From Mon 12:00 am CDT (05:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, low-level wind shear, scattered clouds at 20,000 feet
From Mon 8:00 am CDT (13:00 UTC): wind from the south-southwest at 7 knots, visibility more than 6 miles, a broken layer at 25,000 feet
From Mon 1:00 pm CDT (18:00 UTC): wind from the southwest at 6 knots, visibility more than 6 miles, scattered clouds 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 GRB 6:13 pm CDT (23:13 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 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 upper Mississippi valley · 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: Green Bay/Austin Straubel International, Seattle-Tacoma International.