Plan a flight · Mon 6:43 am EDT (10:43 UTC)

Gerald R Ford International to Seattle-Tacoma International GRR → SEA

1,566 nautical miles (1,802 statute miles) northwest on a straight line, true course 293°, about 299° magnetic at the departure end (variation 6W). At 120 knots that is 13 h 30 min at the quickest height in today's winds (4,500 ft, a 4-knot headwind), arriving about 5:13 pm PDT (00:13 UTC). Right now GRR is VFR, wind from the south (180°) at 3 knots; SEA is VFR, wind from the east-southeast (120°) at 6 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: 3 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

SIGMET C16C: thunderstorms (a convective SIGMET) up to 36,000 ft, moving from the southwest at 40 knots, until 7:55 am EDT (11:55 UTC). Over the route from 619 to 698 nm out.
as issued
```
WSUS32 KKCI 120955
MKCC WST 120955
CONVECTIVE SIGMET 16C
VALID UNTIL 1155Z
SD ND
FROM BIS-60NNW ABR-40SSE DPR-50NNW DPR-BIS
AREA TS MOV FROM 22040KT. TOPS TO FL360.
```
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 439 to 1197 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 818 to 908 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 918 to 1377 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1028 to 1337 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1187 to 1536 nm out.

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 GRR.

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

B77W at 30,000 ft, 31 nm south, 4:00 am EDT (08:00 UTC): light to moderate chop turbulence. 569 nm along the route, 31 nm south of the line.
as filed, and in English
```
ABR UA /OV ABR/TM 0800/FL300/TP B77W/TB LGT-MOD CHOP
```
Report
a routine report filed through ABR
Where
over ABR
Time
08:00 UTC
Height
at 30,000 ft
Aircraft
B77W
Turbulence
light to moderate chop
BE20 at 15,000 ft, 15 nm north, 4:00 am EDT (08:00 UTC): light icing, 0 °C. 768 nm along the route, 15 nm north of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 0800/FL150/TP BE20/TA 00/IC LGT CLR
```
Report
a routine report filed through DIK
Where
over DIK
Time
08:00 UTC
Height
at 15,000 ft
Aircraft
BE20
Temperature
0 °C
Icing
light clear

Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 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 15 forecast points nearest it (MKG, GRB, LSE, MSP, AXN, ABR, DIK, MLS, GGW, BIL, 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	250° at 6 kt	+4 kt	0 °C	116 kt	13 h 30 min	5:13 pm PDT (00:13 UTC)
6,500 ft	240° at 8 kt	+5 kt	7 °C	115 kt	13 h 37 min	5:20 pm PDT (00:20 UTC)
8,500 ft	240° at 11 kt	+7 kt	5 °C	113 kt	13 h 52 min	5:35 pm PDT (00:35 UTC)
10,500 ft	240° at 13 kt	+9 kt	1 °C	111 kt	14 h 06 min	5:49 pm PDT (00:49 UTC)
12,500 ft	240° at 14 kt	+11 kt	-2 °C	109 kt	14 h 22 min	6:05 pm PDT (01:05 UTC)
14,500 ft	250° at 16 kt	+12 kt	-6 °C	108 kt	14 h 30 min	6:13 pm PDT (01:13 UTC)
16,500 ft	250° at 17 kt	+13 kt	-10 °C	107 kt	14 h 38 min	6:21 pm PDT (01:21 UTC)
18,000 ft FL180	250° at 18 kt	+14 kt	-13 °C	106 kt	14 h 46 min	6:29 pm PDT (01:29 UTC)
24,000 ft FL240	250° at 23 kt	+18 kt	-25 °C	102 kt	15 h 21 min	7:04 pm PDT (02:04 UTC)
30,000 ft FL300	250° at 27 kt	+21 kt	-37 °C	99 kt	15 h 49 min	7:32 pm PDT (02:32 UTC)
34,000 ft FL340	250° at 38 kt	+32 kt	-41 °C	88 kt	17 h 48 min	9:31 pm PDT (04:31 UTC)
39,000 ft FL390	260° at 48 kt	+44 kt	-46 °C	76 kt	20 h 36 min	12:19 am PDT (07:19 UTC)

Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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
MKG	used from 0 nm out; 11 nm from the line	260/28	260/18 15°	250/16 9°	260/22 4°	280/31 -9°	270/35 -21°	270/44 -35°	270/42 -45°	290/61 -51°
GRB	used from 100 nm out; 50 nm from the line	250/32	250/22 17°	240/18 8°	280/21 6°	280/34 -11°	280/35 -21°	280/39 -37°	270/52 -45°	290/60 -49°
LSE	used from 200 nm out; 45 nm from the line	250/25	240/21 17°	240/28 11°	250/28 5°	280/24 -10°	280/31 -21°	260/35 -37°	270/45 -43°	280/59 -47°
MSP	used from 299 nm out; 30 nm from the line	250/12	250/17 17°	240/26 12°	250/26 5°	280/26 -9°	280/32 -22°	270/37 -38°	280/47 -41°	280/55 -48°
AXN	used from 399 nm out; 44 nm from the line	110/6	260/10 16°	240/17 12°	250/20 5°	260/29 -10°	260/35 -22°	260/29 -38°	270/48 -41°	270/61 -48°
ABR	used from 499 nm out; 59 nm from the line	080/12	210/12 17°	220/22 12°	230/26 5°	220/28 -10°	230/41 -21°	250/36 -36°	260/47 -39°	260/63 -47°
DIK	used from 648 nm out; 98 nm from the line		190/12 5°	230/29 7°	220/33 1°	220/43 -11°	210/47 -23°	220/53 -33°	240/56 -40°	250/72 -47°
MLS	used from 848 nm out; 38 nm from the line		290/17 -1°	250/18 0°	230/25 0°	220/31 -11°	220/32 -24°	220/50 -32°	220/60 -38°	230/71 -46°
GGW	used from 948 nm out; 78 nm from the line		100/7 -1°	070/10 -3°	190/6 -4°	210/34 -10°	230/33 -24°	210/48 -37°	230/65 -40°	230/71 -46°
BIL	used from 998 nm out; 88 nm from the line		300/14	270/19 -2°	260/26 -2°	220/28 -13°	210/51 -25°	220/56 -33°	220/61 -39°	220/72 -45°
GTF	used from 1047 nm out; 50 nm from the line		L/V	L/V -7°	240/8 -8°	240/30 -14°	240/40 -28°	210/52 -38°	210/76 -38°	220/72 -43°
GPI	used from 1197 nm out; 52 nm from the line		090/8 -4°	140/7 -7°	090/10 -8°	110/10 -19°	210/25 -30°	200/24 -40°	210/31 -39°	210/35 -42°
GEG	used from 1297 nm out; 51 nm from the line		060/7 -2°	070/12 -6°	050/8 -8°	120/11 -21°	110/18 -33°	030/22 -37°	040/6 -38°	240/7 -41°
YKM	used from 1446 nm out; 62 nm from the line	360/6	360/11 -1°	030/20 -7°	040/21 -11°	020/55 -18°	010/84 -26°	010/79 -40°	010/45 -42°	350/23 -42°
SEA	used from 1496 nm out; 45 nm from the line	350/5	010/6 0°	010/9 -4°	010/27 -6°	010/51 -15°	360/58 -26°	360/60 -41°	350/55 -48°	340/30 -45°

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
GRR Grand Rapids, MI	departure	VFR Sky: a few clouds at 25,000 feet	from the south (180°) at 3 knots	8 mi	none	793 ft	5:53 am EDT (09:53 UTC)
MKG Muskegon, MI	40 nm out, 6 nm east of the line, tower	VFR Sky: scattered clouds at 25,000 feet	from the south (190°) at 8 knots	10+ mi	none	628 ft	09:55 UTC
EAU Eau Claire, WI	279 nm out, 20 nm north of the line, tower	VFR	from the south (190°) at 4 knots	10+ mi	none	913 ft	09:56 UTC
STP St Paul, MN	349 nm out, 2 nm northeast of the line, tower	VFR	from the southeast (140°) at 6 knots	10+ mi	none	705 ft	09:53 UTC
MOX Morris, MN	479 nm out, 4 nm northeast of the line	marginal VFR Sky: scattered clouds at 300 feet, a broken layer at 1,300 feet Weather: mist	from the northwest (320°) at 7 knots	5 mi	1,300 ft	1,135 ft	10:10 UTC
DIK Dickinson, ND	768 nm out, 11 nm north of the line	low IFR Sky: sky obscured at 200 feet Weather: fog	from the northeast (050°) at 10 knots	0.5 mi	200 ft	2,592 ft	10:20 UTC
GDV Glendive, MT	858 nm out, 17 nm north of the line	low IFR Sky: overcast at 400 feet Weather: light rain	from the north-northeast (030°) at 10 knots	10+ mi	400 ft	2,458 ft	09:56 UTC
LWT Lewistown, MT	1047 nm out, 15 nm south of the line	no report just now				4,170 ft
GTF Great Falls, MT	1127 nm out, 7 nm northeast of the line, tower	IFR Sky: a few clouds at 400 feet, overcast at 900 feet Weather: light snow, mist	from the north-northwest (330°) at 6 knots	1.75 mi	900 ft	3,680 ft	10:06 UTC
GEG Spokane, WA	1377 nm out, 6 nm northeast of the line, tower	VFR Sky: scattered clouds at 8,000 feet, a broken layer at 11,000 feet	from the northeast (050°) at 7 knots	10+ mi	11,000 ft	2,385 ft	09:53 UTC
MWH Moses Lake, WA	1446 nm out, 20 nm south of the line, tower	VFR	from the north-northeast (020°) at 3 knots	10+ mi	none	1,188 ft	09:52 UTC
SEA Seattle, WA	destination	VFR	from the east-southeast (120°) at 6 knots	10+ mi	none	432 ft	2:53 am PDT (09:53 UTC)

The highest airport on this list sits at 4,170 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, 5:13 pm PDT (00:13 UTC)

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

The whole forecast for SEA

From Mon 2:00 am PDT (09:00 UTC): wind light and variable, visibility more than 6 miles, 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 south at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for GRR, the departure

From Mon 2:00 am EDT (06:00 UTC): wind from the south at 3 knots, visibility 4 miles, mist, scattered clouds at 25,000 feet
At times between Mon 2:00 am EDT (06:00 UTC) and 4:00 am EDT (08:00 UTC): visibility ½ mile, fog
From Mon 5:00 am EDT (09:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 1:00 pm EDT (17:00 UTC): wind from the southwest at 12 knots, gusting to 20, visibility more than 6 miles, a broken layer at 20,000 feet
From Mon 6:00 pm EDT (22:00 UTC): wind from the south-southwest at 10 knots, visibility more than 6 miles, scattered clouds at 8,000 feet
From Mon 10:00 pm EDT (02:00 UTC): wind from the south at 8 knots, visibility 4 miles, light rain showers, mist, scattered clouds at 5,000 feet, overcast at 8,000 feet
30% chance between Mon 10:00 pm EDT (02:00 UTC) and 2:00 am EDT (06:00 UTC): visibility 2 miles, light thunderstorms with rain, mist, overcast at 3,500 feet (thunderheads)

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

6/6656 ANOKA, MN, Monday, October 5, 2026 through Monday, October 19, 2026 Local 13 nm from the route, 369 nm along the route · security · until 19 October · ZMP

Daylight

Sunset at GRR 7:04 pm EDT (23:04 UTC), at SEA 6:25 pm PDT (01:25 UTC) (civil twilight ends 6:56 pm PDT (01:56 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 central Great Lakes · loop National Weather Service

Radar now, the upper Mississippi valley · loop National Weather Service

Radar now, the northern Rockies · 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: Gerald R Ford International, Seattle-Tacoma International.