Green Bay/Austin Straubel International to Ford Airport GRB → IMT
80 nautical miles (92 statute miles) north on a straight line, true course 000°, about 002° magnetic at the departure end (variation 2W). At 120 knots that is 36 min at the quickest height in today's winds (5,500 ft, a 12-knot tailwind), arriving about 10:14 am CDT (15:14 UTC). Right now GRB is VFR, wind from the south-southwest (200°) at 5 knots; IMT is VFR, wind variable at 5 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 SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 0 nm of the route.
- AIRMET ZULU 3C: moderate icing from 12,000 ft to 24,000 ft. Near the route, at the destination end.
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
- C208 at 1,400 ft, 44 nm northeast, 7:50 am CDT (12:50 UTC): a routine report with nothing remarked on. At the destination end, 44 nm northeast of the line.
as filed, and in English
SAW UA /OV SAW/TM 1250/FL014/TP C208/SK BASE014-TOP026
- Report
- a routine report filed through SAW
- Where
- over SAW
- Time
- 12:50 UTC
- Height
- at 1,400 ft
- Aircraft
- C208
- Sky
- BASE014-TOP026
- B190 at 1,400 ft, 44 nm northeast, 7:29 am CDT (12:29 UTC): no icing. At the destination end, 44 nm northeast of the line.
as filed, and in English
SAW UA /OV SAW/TM 1229/FL014/TP B190/SK BASE014-TOP023/IC NEG
- Report
- a routine report filed through SAW
- Where
- over SAW
- Time
- 12:29 UTC
- Height
- at 1,400 ft
- Aircraft
- B190
- Sky
- BASE014-TOP023
- Icing
- none
Winds aloft along the route, and the time en route the forecast for use 14:00–21:00 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 1 forecast point nearest it (GRB). 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 | 250° at 13 kt | −4 kt | 124 kt | 39 min | 10:17 am CDT (15:17 UTC) | |
| 5,500 ft | 240° at 24 kt | −12 kt | 132 kt | 36 min | 10:14 am CDT (15:14 UTC) | |
| 7,500 ft | 250° at 29 kt | −10 kt | 13 °C | 130 kt | 37 min | 10:15 am CDT (15:15 UTC) |
| 9,500 ft | 260° at 30 kt | −5 kt | 9 °C | 125 kt | 38 min | 10:16 am CDT (15:16 UTC) |
| 11,500 ft | 270° at 26 kt | −1 kt | 6 °C | 121 kt | 40 min | 10:18 am CDT (15:18 UTC) |
| 13,500 ft | 270° at 26 kt | +1 kt | 1 °C | 119 kt | 40 min | 10:18 am CDT (15:18 UTC) |
| 15,500 ft | 280° at 28 kt | +3 kt | -4 °C | 117 kt | 41 min | 10:19 am CDT (15:19 UTC) |
| 17,500 ft | 280° at 30 kt | +5 kt | -9 °C | 115 kt | 42 min | 10:20 am CDT (15:20 UTC) |
| 18,000 ft FL180 | 280° at 31 kt | +5 kt | -10 °C | 115 kt | 42 min | 10:20 am CDT (15:20 UTC) |
| 24,000 ft FL240 | 280° at 35 kt | +6 kt | -22 °C | 114 kt | 42 min | 10:20 am CDT (15:20 UTC) |
| 30,000 ft FL300 | 270° at 46 kt | 0 | -37 °C | 120 kt | 40 min | 10:18 am CDT (15:18 UTC) |
| 34,000 ft FL340 | 290° at 43 kt | +14 kt | -40 °C | 106 kt | 45 min | 10:23 am CDT (15:23 UTC) |
| 39,000 ft FL390 | 300° at 64 kt | +32 kt | -48 °C | 88 kt | 55 min | 10:33 am CDT (15:33 UTC) |
Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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; 22 nm from the line | 260/10 | 240/27 16° | 260/31 10° | 270/25 5° | 280/31 -10° | 280/35 -22° | 270/46 -37° | 290/43 -40° | 300/64 -48° |
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 (200°) at 5 knots | 10+ mi | none | 695 ft | 8:53 am CDT (13:53 UTC) |
| OCQ Oconto, WI | 27 nm out, 10 nm east of the line | VFR | calm | 10+ mi | none | 604 ft | 14:15 UTC |
| IMT Iron Mountain Kingsford, MI | destination | VFR | variable at 5 knots | 10+ mi | none | 1,182 ft | 8:54 am CDT (13:54 UTC) |
The highest airport on this list sits at 1,182 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At IMT when you get there the forecast at the estimated arrival, 10:14 am CDT (15:14 UTC)
IMT has no terminal forecast; use the nearest airport that does.
The forecast for GRB, the departure
- From Mon 7:00 am CDT (12:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, scattered clouds at 20,000 feet
- From Mon 8:00 pm CDT (01:00 UTC): wind from the east-southeast at 3 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 10,000 feet
- 30% chance between Mon 9:00 pm CDT (02:00 UTC) and 11:00 pm CDT (04:00 UTC): light rain showers, a broken layer at 6,000 feet
- From Mon 11:00 pm CDT (04:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, a broken layer at 2,000 feet
- From Tue 3:00 am CDT (08:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, scattered clouds at 2,000 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 GRB 6:13 pm CDT (23:13 UTC), at IMT 6:12 pm CDT (23:12 UTC) (civil twilight ends 6:42 pm CDT (23:42 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, Ford Airport.