Green Bay/Austin Straubel International to Denver International GRB → DEN
785 nautical miles (903 statute miles) west on a straight line, true course 255°, about 257° magnetic at the departure end (variation 2W). At 120 knots that is 7 h 56 min at the quickest height in today's winds (10,500 ft, a 21-knot headwind), arriving about 8:39 am MDT (14:39 UTC). 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: 18 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 20 to 696 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the last 119 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 70 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
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 8 forecast points nearest it (GRB, LSE, MCW, FSD, ONL, GRI, GLD, DEN). 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 | 230° at 32 kt | +30 kt | 20 °C | 90 kt | 8 h 43 min | 9:26 am MDT (15:26 UTC) |
| 6,500 ft | 230° at 29 kt | +28 kt | 17 °C | 92 kt | 8 h 32 min | 9:15 am MDT (15:15 UTC) |
| 8,500 ft | 230° at 23 kt | +23 kt | 13 °C | 97 kt | 8 h 06 min | 8:49 am MDT (14:49 UTC) |
| 10,500 ft | 240° at 21 kt | +21 kt | 9 °C | 99 kt | 7 h 56 min | 8:39 am MDT (14:39 UTC) |
| 12,500 ft | 240° at 21 kt | +21 kt | 5 °C | 99 kt | 7 h 56 min | 8:39 am MDT (14:39 UTC) |
| 14,500 ft | 240° at 21 kt | +21 kt | 0 °C | 99 kt | 7 h 56 min | 8:39 am MDT (14:39 UTC) |
| 16,500 ft | 240° at 22 kt | +22 kt | -4 °C | 98 kt | 8 h 01 min | 8:44 am MDT (14:44 UTC) |
| 18,000 ft FL180 | 250° at 22 kt | +23 kt | -8 °C | 97 kt | 8 h 06 min | 8:49 am MDT (14:49 UTC) |
| 24,000 ft FL240 | 240° at 30 kt | +30 kt | -21 °C | 90 kt | 8 h 43 min | 9:26 am MDT (15:26 UTC) |
| 30,000 ft FL300 | 250° at 45 kt | +45 kt | -34 °C | 75 kt | 10 h 28 min | 11:11 am MDT (17:11 UTC) |
| 34,000 ft FL340 | 260° at 50 kt | +50 kt | -40 °C | 70 kt | 11 h 13 min | 11:56 am MDT (17:56 UTC) |
| 39,000 ft FL390 | 260° at 57 kt | +56 kt | -49 °C | 64 kt | 12 h 16 min | 12:59 pm MDT (18:59 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° |
| LSE | used from 50 nm out; 65 nm from the line | 230/40 | 240/24 17° | 240/13 10° | 250/13 6° | 280/22 -9° | 250/28 -21° | 250/41 -34° | 260/42 -44° | 270/62 -53° |
| MCW | used from 199 nm out; 19 nm from the line | 220/44 | 250/30 17° | 230/14 12° | 240/17 6° | 250/22 -8° | 270/29 -20° | 250/34 -34° | 260/52 -43° | 260/59 -51° |
| FSD | used from 298 nm out; 79 nm from the line | 190/9 | 230/30 18° | 240/23 13° | 240/20 6° | 260/22 -9° | 250/31 -21° | 250/43 -36° | 260/49 -43° | 270/53 -47° |
| ONL | used from 397 nm out; 61 nm from the line | 210/31 20° | 230/27 13° | 230/18 7° | 220/19 -8° | 240/26 -20° | 250/44 -35° | 270/52 -39° | 260/57 -47° | |
| GRI | used from 547 nm out; 98 nm from the line | 230/35 21° | 230/23 13° | 220/20 7° | 240/25 -8° | 240/37 -20° | 250/49 -33° | 260/57 -38° | 260/58 -47° | |
| GLD | used from 596 nm out; 100 nm from the line | 230/49 | 230/42 15° | 220/26 8° | 240/18 -7° | 230/27 -21° | 240/62 -30° | 240/61 -35° | 250/57 -47° | |
| DEN | used from 696 nm out; 65 nm from the line | 240/21 14° | 250/44 6° | 220/49 -8° | 220/49 -21° | 230/54 -30° | 240/57 -35° | 240/49 -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 |
|---|---|---|---|---|---|---|---|
| GRB Green Bay, WI | departure | no report just now | 695 ft | ||||
| ATW Appleton, WI | 20 nm out, 9 nm south of the line, tower | no report just now | 918 ft | ||||
| LSE La Crosse, WI | 139 nm out, 2 nm northwest of the line, tower | no report just now | 655 ft | ||||
| RST Rochester, MN | 189 nm out, 20 nm north of the line, tower | no report just now | 1,317 ft | ||||
| AXA Algona, IA | 278 nm out, 3 nm south of the line | no report just now | 1,216 ft | ||||
| SUX Sioux City, IA | 378 nm out, 9 nm south of the line, tower | no report just now | 1,098 ft | ||||
| LCG Wayne, NE | 407 nm out, 9 nm south of the line | no report just now | 1,431 ft | ||||
| BUB Burwell, NE | 507 nm out, 3 nm west of the line | no report just now | 2,183 ft | ||||
| LBF North Platte, NE | 586 nm out, 8 nm south of the line | no report just now | 2,777 ft | ||||
| GGF Grant, NE | 636 nm out, 3 nm south of the line | no report just now | 3,424 ft | ||||
| FMM Fort Morgan, CO | 735 nm out, 8 nm northwest of the line | no report just now | 4,595 ft | ||||
| DEN Denver, CO | destination | no report just now | 5,433 ft |
The highest airport on this list sits at 5,433 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At DEN when you get there the forecast at the estimated arrival, 8:39 am MDT (14:39 UTC)
DEN 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 GRB 6:13 pm CDT (23:13 UTC), at DEN 6:22 pm MDT (00:22 UTC) (civil twilight ends 6:49 pm MDT (00:49 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, Denver International.