Gerald R Ford International to Duluth International GRR → DLH
370 nautical miles (426 statute miles) northwest on a straight line, true course 312°, about 318° magnetic at the departure end (variation 6W). At 120 knots that is 3 h 20 min at the quickest height in today's winds (4,500 ft, a 9-knot headwind), arriving about 6:22 am CDT (11:22 UTC), after sunset at the destination. 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 3W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the route from 68 to 234 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 last 39 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 GRR.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
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 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 3 forecast points nearest it (MKG, GRB, DLH). 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 | 260° at 15 kt | +9 kt | 111 kt | 3 h 20 min | 6:22 am CDT (11:22 UTC) | |
| 6,500 ft | 260° at 19 kt | +13 kt | 14 °C | 107 kt | 3 h 27 min | 6:29 am CDT (11:29 UTC) |
| 8,500 ft | 260° at 17 kt | +12 kt | 10 °C | 108 kt | 3 h 26 min | 6:28 am CDT (11:28 UTC) |
| 10,500 ft | 260° at 18 kt | +10 kt | 6 °C | 110 kt | 3 h 22 min | 6:24 am CDT (11:24 UTC) |
| 12,500 ft | 250° at 20 kt | +11 kt | 2 °C | 109 kt | 3 h 24 min | 6:26 am CDT (11:26 UTC) |
| 14,500 ft | 260° at 23 kt | +16 kt | -2 °C | 104 kt | 3 h 33 min | 6:35 am CDT (11:35 UTC) |
| 16,500 ft | 270° at 27 kt | +21 kt | -7 °C | 99 kt | 3 h 44 min | 6:46 am CDT (11:46 UTC) |
| 18,000 ft FL180 | 280° at 30 kt | +25 kt | -10 °C | 95 kt | 3 h 54 min | 6:56 am CDT (11:56 UTC) |
| 24,000 ft FL240 | 280° at 33 kt | +29 kt | -20 °C | 91 kt | 4 h 04 min | 7:06 am CDT (12:06 UTC) |
| 30,000 ft FL300 | 290° at 40 kt | +38 kt | -36 °C | 82 kt | 4 h 31 min | 7:33 am CDT (12:33 UTC) |
| 34,000 ft FL340 | 290° at 48 kt | +45 kt | -45 °C | 75 kt | 4 h 56 min | 7:58 am CDT (12:58 UTC) |
| 39,000 ft FL390 | 290° at 66 kt | +61 kt | -54 °C | 59 kt | 6 h 16 min | 9:18 am CDT (14:18 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| MKG | used from 0 nm out; 13 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° |
| GRB | used from 97 nm out; 27 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° |
| DLH | used from 243 nm out; 102 nm from the line | 080/28 | 240/21 15° | 250/26 9° | 250/32 3° | 260/42 -11° | 270/40 -21° | 260/43 -36° | 260/46 -46° | 260/65 -54° |
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 | no report just now | 793 ft | ||||
| MKG Muskegon, MI | 39 nm out, 9 nm south of the line, tower | no report just now | 628 ft | ||||
| LDM Ludington, MI | 68 nm out, 23 nm northeast of the line | no report just now | 646 ft | ||||
| MTW Manitowoc, WI | 117 nm out, 7 nm west of the line | no report just now | 650 ft | ||||
| GRB Green Bay, WI | 146 nm out, 4 nm west of the line, tower | no report just now | 695 ft | ||||
| EZS Shawano, WI | 175 nm out, 1 nm south of the line | no report just now | 813 ft | ||||
| TKV Tomahawk, WI | 243 nm out, 4 nm south of the line | no report just now | 1,486 ft | ||||
| PKF Park Falls, WI | 282 nm out, 4 nm east of the line | no report just now | 1,501 ft | ||||
| ASX Ashland, WI | 321 nm out, 19 nm northeast of the line | no report just now | 826 ft | ||||
| OLG Solon Springs, WI | 341 nm out, 16 nm southwest of the line | no report just now | 1,102 ft | ||||
| DLH Duluth, MN | destination | no report just now | 1,427 ft |
The highest airport on this list sits at 1,501 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At DLH when you get there the forecast at the estimated arrival, 6:22 am CDT (11:22 UTC)
DLH has no terminal forecast; use the nearest airport that does.
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 GRR 7:04 pm EDT (23:04 UTC), at DLH 6:27 pm CDT (23:27 UTC) (civil twilight ends 6:58 pm CDT (23:58 UTC)). At 120 knots the arrival at DLH is before sunrise there (7:22 am CDT (12:22 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: Gerald R Ford International, Duluth International.