City Of Colorado Springs Municipal to Green Bay/Austin Straubel International COS → GRB
816 nautical miles (939 statute miles) northeast on a straight line, true course 060°, about 052° magnetic at the departure end (variation 8E). At 120 knots that is 4 h 38 min at the quickest height in today's winds (39,000 ft, a 56-knot tailwind), arriving about 3:09 am CDT (08:09 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
- SIGMET W11W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 10:55 pm MDT (04:55 UTC). Near the route, at the departure end.
as issued
WSUS33 KKCI 120255 MKCW WST 120255 CONVECTIVE SIGMET 11W VALID UNTIL 0455Z CO NM FROM 20WNW PUB-10ENE CIM-50WNW ABQ-30NNE DVC-20WNW PUB AREA TS MOV FROM 22040KT. TOPS TO FL340.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 119 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 80 nm of the route.
- 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 90 to 577 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 COS.
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 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 8 forecast points nearest it (PUB, DEN, GLD, GRI, OMA, MCW, LSE, 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 | 230° at 39 kt | −37 kt | 157 kt | 5 h 12 min | 3:43 am CDT (08:43 UTC) | |
| 5,500 ft | 240° at 35 kt | −34 kt | 21 °C | 154 kt | 5 h 18 min | 3:49 am CDT (08:49 UTC) |
| 7,500 ft | 240° at 27 kt | −27 kt | 15 °C | 147 kt | 5 h 33 min | 4:04 am CDT (09:04 UTC) |
| 9,500 ft | 230° at 22 kt | −22 kt | 11 °C | 142 kt | 5 h 45 min | 4:16 am CDT (09:16 UTC) |
| 11,500 ft | 230° at 21 kt | −21 kt | 7 °C | 141 kt | 5 h 47 min | 4:18 am CDT (09:18 UTC) |
| 13,500 ft | 240° at 22 kt | −22 kt | 2 °C | 142 kt | 5 h 45 min | 4:16 am CDT (09:16 UTC) |
| 15,500 ft | 240° at 23 kt | −23 kt | -2 °C | 143 kt | 5 h 42 min | 4:13 am CDT (09:13 UTC) |
| 17,500 ft | 250° at 24 kt | −24 kt | -7 °C | 144 kt | 5 h 40 min | 4:11 am CDT (09:11 UTC) |
| 18,000 ft FL180 | 250° at 24 kt | −25 kt | -8 °C | 145 kt | 5 h 38 min | 4:09 am CDT (09:09 UTC) |
| 24,000 ft FL240 | 250° at 31 kt | −32 kt | -20 °C | 152 kt | 5 h 22 min | 3:53 am CDT (08:53 UTC) |
| 30,000 ft FL300 | 250° at 48 kt | −48 kt | -33 °C | 168 kt | 4 h 51 min | 3:22 am CDT (08:22 UTC) |
| 34,000 ft FL340 | 260° at 54 kt | −54 kt | -40 °C | 174 kt | 4 h 41 min | 3:12 am CDT (08:12 UTC) |
| 39,000 ft FL390 | 260° at 58 kt | −56 kt | -49 °C | 176 kt | 4 h 38 min | 3:09 am CDT (08:09 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| PUB | used from 0 nm out; 45 nm from the line | 230/25 13° | 230/32 6° | 220/44 -8° | 230/49 -21° | 240/70 -28° | 240/67 -34° | 240/58 -46° | ||
| DEN | used from 50 nm out; 69 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° | ||
| GLD | used from 100 nm out; 41 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° | |
| GRI | used from 249 nm out; 53 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° | |
| OMA | used from 398 nm out; 52 nm from the line | 220/47 | 240/33 19° | 250/18 11° | 230/17 6° | 260/29 -8° | 250/33 -19° | 250/51 -33° | 260/61 -40° | 270/62 -49° |
| MCW | used from 498 nm out; 55 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° |
| LSE | used from 647 nm out; 13 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° |
| GRB | used from 746 nm out; 45 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° |
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 |
|---|---|---|---|---|---|---|---|
| COS Colorado Springs, CO | departure | no report just now | 6,187 ft | ||||
| LIC Limon, CO | 60 nm out, 4 nm west of the line | no report just now | 5,374 ft | ||||
| RYA Wray, CO | 139 nm out, 12 nm northwest of the line | no report just now | 3,677 ft | ||||
| MCK Mc Cook, NE | 209 nm out, 18 nm south of the line | no report just now | 2,582 ft | ||||
| GRI Grand Island, NE | 318 nm out, 24 nm southeast of the line, tower | no report just now | 1,847 ft | ||||
| BVN Albion, NE | 348 nm out, 13 nm north of the line | no report just now | 1,806 ft | ||||
| SUX Sioux City, IA | 438 nm out, 18 nm northwest of the line, tower | no report just now | 1,098 ft | ||||
| POH Pocahontas, IA | 517 nm out, 6 nm northwest of the line | no report just now | 1,225 ft | ||||
| CJJ Cresco, IA | 627 nm out, 4 nm east of the line | no report just now | 1,279 ft | ||||
| CMY Sparta, WI | 697 nm out, 9 nm north of the line, tower | no report just now | 839 ft | ||||
| ATW Appleton, WI | 796 nm out, 7 nm south of the line, tower | no report just now | 918 ft | ||||
| GRB Green Bay, WI | destination | no report just now | 695 ft |
The highest airport on this list sits at 6,187 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At GRB when you get there the forecast at the estimated arrival, 3:09 am CDT (08:09 UTC)
GRB has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8770 COLORADO SPRINGS, CO, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 15 nm from the route, at the departure end · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 12 October · ZDV
Daylight
Sunset at COS 6:25 pm MDT (00:25 UTC), at GRB 6:13 pm CDT (23:13 UTC) (civil twilight ends 6:42 pm CDT (23:42 UTC)). At 120 knots the arrival at GRB is before sunrise there (7:03 am CDT (12:03 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: City Of Colorado Springs Municipal, Green Bay/Austin Straubel International.