Green Bay/Austin Straubel International to Washington Dulles International GRB → IAD
582 nautical miles (669 statute miles) southeast on a straight line, true course 121°, about 123° magnetic at the departure end (variation 2W). At 120 knots that is 3 h 21 min at the quickest height in today's winds (39,000 ft, a 54-knot tailwind), arriving about 6:58 am EDT (10:58 UTC), after sunset at the destination. Right now GRB is VFR, wind from the south-southwest (210°) at 6 knots; IAD is IFR, wind from the north-northwest (340°) 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: 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 3W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground), from 1:00 am CDT (06:00 UTC). Near the route, at the departure end.
- AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist), from 1:00 am CDT (06:00 UTC). Over the last 453 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist), from 1:00 am CDT (06:00 UTC). Over the route from 414 to 552 nm out.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft, from 1:00 am CDT (06:00 UTC). Over the last 89 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
- A333 descending, 3 nm southeast, 12:44 am CDT (05:44 UTC): a routine report with nothing remarked on. 246 nm along the route, 3 nm southeast of the line.
as filed, and in English
DTW UA /OV DTW/TM 0544/FLDURD/TP A333/SK TOPS 025
- Report
- a routine report filed through DTW
- Where
- over DTW
- Time
- 05:44 UTC
- Height
- during the descent
- Aircraft
- A333
- Sky
- tops 2,500 ft
- B739 descending, 3 nm southeast, 11:54 pm CDT (04:54 UTC): a routine report with nothing remarked on. 246 nm along the route, 3 nm southeast of the line.
as filed, and in English
DTW UA /OV DTW/TM 0454/FLDURD/TP B739/SK BASES 011
- Report
- a routine report filed through DTW
- Where
- over DTW
- Time
- 04:54 UTC
- Height
- during the descent
- Aircraft
- B739
- Sky
- bases 1,100 ft
- B738 at 1,700 ft, 44 nm southwest, 1:20 am CDT (06:20 UTC): overcast from 1,700 ft to 2,000 ft, remarks: during the descent. 256 nm along the route, 44 nm southwest of the line.
as filed, and in English
TOL UA /OV KTOL/TM 0620/FL017/TP B738/SK OVC017-TOP020/RM DURD
- Report
- a routine report filed through TOL
- Where
- over KTOL
- Time
- 06:20 UTC
- Height
- at 1,700 ft
- Aircraft
- B738
- Sky
- overcast from 1,700 ft, tops 2,000 ft
- Remarks
- during the descent
- B738 at 1,800 ft, 44 nm southwest, 12:18 am CDT (05:18 UTC): overcast from 1,800 ft to 2,700 ft, remarks: during the climb. 256 nm along the route, 44 nm southwest of the line.
as filed, and in English
TOL UA /OV KTOL/TM 0518/FL018/TP B738/SK OVC018-TOP027/RM DURC
- Report
- a routine report filed through TOL
- Where
- over KTOL
- Time
- 05:18 UTC
- Height
- at 1,800 ft
- Aircraft
- B738
- Sky
- overcast from 1,800 ft, tops 2,700 ft
- Remarks
- during the climb
- B738 at 1,300 ft, 44 nm southwest, 11:45 pm CDT (04:45 UTC): overcast from 1,300 ft to 3,000 ft, remarks: during the descent. 256 nm along the route, 44 nm southwest of the line.
as filed, and in English
TOL UA /OV KTOL/TM 0445/FL013/TP B738/SK OVC013-TOP030/RM DURD
- Report
- a routine report filed through TOL
- Where
- over KTOL
- Time
- 04:45 UTC
- Height
- at 1,300 ft
- Aircraft
- B738
- Sky
- overcast from 1,300 ft, tops 3,000 ft
- Remarks
- during the descent
- B737 at 800 ft, 39 nm east, 2:30 am CDT (07:30 UTC): remarks: bases 800 ft. At the destination end, 39 nm east of the line.
as filed, and in English
BWI UA /OV BWI/TM 0730/FL008/TP B737/RM BASES 008
- Report
- a routine report filed through BWI
- Where
- over BWI
- Time
- 07:30 UTC
- Height
- at 800 ft
- Aircraft
- B737
- Remarks
- bases 800 ft
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 (GRB, MKG, FWA, CLE, AGC, EKN). 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 | 290° at 13 kt | −13 kt | 133 kt | 4 h 23 min | 8:00 am EDT (12:00 UTC) | |
| 5,500 ft | 320° at 15 kt | −15 kt | 12 °C | 135 kt | 4 h 19 min | 7:56 am EDT (11:56 UTC) |
| 7,500 ft | 330° at 16 kt | −15 kt | 11 °C | 135 kt | 4 h 19 min | 7:56 am EDT (11:56 UTC) |
| 9,500 ft | 330° at 15 kt | −14 kt | 8 °C | 134 kt | 4 h 21 min | 7:58 am EDT (11:58 UTC) |
| 11,500 ft | 330° at 14 kt | −12 kt | 4 °C | 132 kt | 4 h 25 min | 8:02 am EDT (12:02 UTC) |
| 13,500 ft | 330° at 16 kt | −15 kt | 0 °C | 135 kt | 4 h 19 min | 7:56 am EDT (11:56 UTC) |
| 15,500 ft | 320° at 20 kt | −19 kt | -4 °C | 139 kt | 4 h 11 min | 7:48 am EDT (11:48 UTC) |
| 17,500 ft | 320° at 24 kt | −23 kt | -9 °C | 143 kt | 4 h 04 min | 7:41 am EDT (11:41 UTC) |
| 18,000 ft FL180 | 320° at 25 kt | −24 kt | -10 °C | 144 kt | 4 h 03 min | 7:40 am EDT (11:40 UTC) |
| 24,000 ft FL240 | 320° at 33 kt | −32 kt | -21 °C | 152 kt | 3 h 50 min | 7:27 am EDT (11:27 UTC) |
| 30,000 ft FL300 | 330° at 43 kt | −40 kt | -36 °C | 160 kt | 3 h 38 min | 7:15 am EDT (11:15 UTC) |
| 34,000 ft FL340 | 320° at 50 kt | −48 kt | -43 °C | 168 kt | 3 h 28 min | 7:05 am EDT (11:05 UTC) |
| 39,000 ft FL390 | 320° at 55 kt | −54 kt | -50 °C | 174 kt | 3 h 21 min | 6:58 am EDT (10:58 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| GRB | used from 0 nm out; 25 nm from the line | 250/36 | 270/23 16° | 270/14 9° | 240/18 4° | 280/26 -9° | 280/29 -20° | 290/42 -36° | 290/51 -45° | 290/72 -55° |
| MKG | used from 49 nm out; 44 nm from the line | 260/22 | 290/16 15° | 300/11 10° | 290/5 3° | 300/26 -9° | 300/32 -20° | 320/48 -36° | 320/61 -45° | 310/74 -53° |
| FWA | used from 197 nm out; 109 nm from the line | 300/17 | 320/20 16° | 330/20 10° | 340/15 3° | 310/27 -8° | 320/37 -20° | 330/52 -36° | 330/65 -43° | 330/60 -50° |
| CLE | used from 246 nm out; 61 nm from the line | 340/7 | 010/16 13° | 350/18 8° | 350/20 3° | 340/31 -10° | 340/46 -21° | 340/54 -37° | 330/62 -44° | 340/65 -49° |
| AGC | used from 394 nm out; 21 nm from the line | 350/14 | 330/20 11° | 340/18 8° | 330/17 3° | 340/22 -11° | 340/31 -22° | 330/33 -36° | 300/34 -41° | 300/35 -47° |
| EKN | used from 493 nm out; 74 nm from the line | 330/21 12° | 330/25 7° | 350/22 2° | 330/24 -10° | 310/27 -21° | 320/33 -35° | 290/31 -39° | 290/34 -47° |
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-southwest (210°) at 6 knots | 10+ mi | none | 695 ft | 1:53 am CDT (06:53 UTC) |
| MTW Manitowoc, WI | 30 nm out, 8 nm southwest of the line | VFR | from the southwest (230°) at 8 knots | 10+ mi | none | 650 ft | 06:56 UTC |
| MKG Muskegon, MI | 108 nm out, 24 nm southwest of the line, tower | reported, no category | from the south (190°) at 6 knots | 10+ mi | none | 628 ft | 06:55 UTC |
| GRR Grand Rapids, MI | 148 nm out, 22 nm southwest of the line, tower | VFR | from the southeast (140°) at 5 knots | 7 mi | none | 793 ft | 06:53 UTC |
| LAN Lansing, MI | 187 nm out, 5 nm southwest of the line, tower | VFR | from the south (190°) at 5 knots | 9 mi | none | 860 ft | 06:53 UTC |
| DTW Detroit, MI | 246 nm out, 3 nm southeast of the line, tower | IFR Sky: overcast at 900 feet | from the west-southwest (250°) at 5 knots | 10+ mi | 900 ft | 645 ft | 07:32 UTC |
| CLE Cleveland, OH | 335 nm out, 4 nm west of the line, tower | IFR Sky: a broken layer at 600 feet, a broken layer at 1,500 feet, overcast at 2,000 feet Weather: light drizzle, mist | from the west-northwest (290°) at 6 knots | 4 mi | 600 ft | 799 ft | 07:16 UTC |
| BVI Beaver Falls, PA | 404 nm out, 6 nm east of the line, tower | reported, no category | calm | none | 1,252 ft | 19:47 UTC | |
| PIT Pittsburgh, PA | 424 nm out, 4 nm southwest of the line, tower | low IFR Sky: overcast at 300 feet Weather: light drizzle, mist | from the northwest (320°) at 6 knots | 4 mi | 300 ft | 1,202 ft | 06:51 UTC |
| CBE Cumberland, MD | 513 nm out, 6 nm west of the line | marginal VFR Sky: a broken layer at 2,200 feet, overcast at 2,700 feet | from the northeast (050°) at 4 knots | 10+ mi | 2,200 ft | 757 ft | 07:15 UTC |
| MRB Martinsburg, WV | 542 nm out, 7 nm northeast of the line, tower | marginal VFR Sky: a broken layer at 1,300 feet, a broken layer at 3,800 feet, overcast at 9,000 feet Weather: light rain | from the north-northwest (330°) at 8 knots | 10+ mi | 1,300 ft | 564 ft | 07:09 UTC |
| IAD Washington, DC | destination | IFR Sky: a broken layer at 900 feet, overcast at 2,000 feet Weather: light rain, mist | from the north-northwest (340°) at 11 knots | 4 mi | 900 ft | 312 ft | 2:52 am EDT (06:52 UTC) |
The highest airport on this list sits at 1,252 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At IAD when you get there the forecast at the estimated arrival, 6:58 am EDT (10:58 UTC)
Wind from the north-northwest at 12 knots, visibility 5 miles, light rain, mist, overcast at 600 feet IFR
The whole forecast for IAD
- From Mon 2:00 am EDT (06:00 UTC): wind from the north-northwest at 12 knots, visibility 5 miles, light rain, mist, overcast at 600 feet
- From Mon 8:00 am EDT (12:00 UTC): wind from the north-northwest at 10 knots, gusting to 18, visibility more than 6 miles, overcast at 1,000 feet
- From Mon 12:00 pm EDT (16:00 UTC): wind from the north-northwest at 13 knots, gusting to 21, visibility more than 6 miles, scattered clouds at 1,500 feet, overcast at 2,500 feet
- From Mon 2:00 pm EDT (18:00 UTC): wind from the north-northwest at 11 knots, gusting to 18, visibility more than 6 miles, scattered clouds at 2,500 feet, overcast at 3,500 feet
- From Mon 5:00 pm EDT (21:00 UTC): wind from the northwest at 7 knots, visibility more than 6 miles, a broken layer at 3,500 feet
- From Mon 8:00 pm EDT (00:00 UTC): wind from the west-northwest at 3 knots, visibility more than 6 miles, scattered clouds at 4,000 feet
The forecast for GRB, the departure
- From Mon 1:00 am CDT (06:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, low-level wind shear, a broken layer at 25,000 feet
- From Mon 5:00 am CDT (10:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, a broken layer at 20,000 feet
- From Mon 11:00 am CDT (16:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, clear skies
- From Mon 5:00 pm CDT (22:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, scattered clouds at 15,000 feet
- 30% chance between Mon 6:00 pm CDT (23:00 UTC) and 10:00 pm CDT (03:00 UTC): light rain showers, a broken layer at 6,000 feet
- From Mon 10:00 pm CDT (03:00 UTC): wind from the east-southeast at 4 knots, visibility more than 6 miles, scattered clouds at 2,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, 365 nm along the route · a VIP movement · today · ZOB
- 6/8888 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 20 nm from the route, 384 nm along the route · security · today · ZOB
- 6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 4 nm from the route, 384 nm along the route · a VIP movement · today · ZOB
- 4/9383 WASHINGTON, DC., USA 8 nm from the route, at the destination end · security · ZDC
- 6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local 4 nm from the route, at the destination end · a VIP movement · today · ZDC
Daylight
Sunset at GRB 6:13 pm CDT (23:13 UTC), at IAD 6:36 pm EDT (22:36 UTC) (civil twilight ends 7:02 pm EDT (23:02 UTC)). At 120 knots the arrival at IAD is before sunrise there (7:16 am EDT (11:16 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
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, Washington Dulles International.