Robert Gray Army Airfield to City Of Colorado Springs Municipal GRK → COS
574 nautical miles (661 statute miles) northwest on a straight line, true course 326°, about 322° magnetic at the departure end (variation 4E). At 120 knots that is 4 h 06 min at the quickest height in today's winds (4,500 ft, a 20-knot tailwind), arriving about 11:07 pm MDT (05:07 UTC), after sunset at the destination. Right now GRK is VFR, wind from the south-southeast (160°) at 4 knots; COS is VFR, wind from the west-southwest (240°) at 14 knots, gusting to 25. 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: 3 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 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 59 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 10 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 GRK.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- GLF5 at 45,000 ft, 25 nm north, 5:44 pm CDT (22:44 UTC): moderate turbulence, remarks: ZDVWC-46. At the destination end, 25 nm north of the line.
as filed, and in English
COS UA /OV COS350025/TM 2244/FL450/TP GLF5/TB MOD /RM ZDVWC-46
- Report
- a routine report filed through COS
- Where
- 25 nm north (350°) of COS
- Time
- 22:44 UTC
- Height
- at 45,000 ft
- Aircraft
- GLF5
- Turbulence
- moderate
- Remarks
- ZDVWC-46
- CRJ2 at 19,000 ft, 14 nm northwest, 5:02 pm CDT (22:02 UTC): moderate chop turbulence, remarks: during the climb from KDEN from 12,000 ft to 19,000 ft ZDVWC-41. At the destination end, 14 nm northwest of the line.
as filed, and in English
COS UA /OV BRK262015/TM 2202/FL190/TP CRJ2/TB MOD CHOP/RM DURC FROM KDEN 120-190 ZDVWC-41
- Report
- a routine report filed through COS
- Where
- 15 nm west (262°) of BRK
- Time
- 22:02 UTC
- Height
- at 19,000 ft
- Aircraft
- CRJ2
- Turbulence
- moderate chop
- Remarks
- during the climb from KDEN from 12,000 ft to 19,000 ft ZDVWC-41
- A320 at 35,000 ft, 10 nm southwest, 7:43 pm CDT (00:43 UTC): light chop turbulence, remarks: ZFW47. 257 nm along the route, 10 nm southwest of the line.
as filed, and in English
CDS UA /OV CDS270030/TM 0043/FL350/TP A320/TB LGT CHOP/RM ZFW47
- Report
- a routine report filed through CDS
- Where
- 30 nm west (270°) of CDS
- Time
- 00:43 UTC
- Height
- at 35,000 ft
- Aircraft
- A320
- Turbulence
- light chop
- Remarks
- ZFW47
- A21N at 31,000 ft, 9 nm southwest, 7:24 pm CDT (00:24 UTC): remarks: mountain wave +/-10-20KT ZDVWC-29. 545 nm along the route, 9 nm southwest of the line.
as filed, and in English
PUB UA /OV PUB/TM 0024/FL310/TP A21N/RM MTN WAVE +/-10-20KT ZDVWC-29
- Report
- a routine report filed through PUB
- Where
- over PUB
- Time
- 00:24 UTC
- Height
- at 31,000 ft
- Aircraft
- A21N
- Remarks
- mountain wave +/-10-20KT ZDVWC-29
- CL35 at 43,000 ft, 45 nm southwest, 7:21 pm CDT (00:21 UTC): remarks: mtw +/-300FT zdvwc. At the destination end, 45 nm southwest of the line.
as filed, and in English
PUB UA /OV PUB250040/TM 0021/FL430/TP CL35/RM MTW +/-300FT ZDVWC
- Report
- a routine report filed through PUB
- Where
- 40 nm west (250°) of PUB
- Time
- 00:21 UTC
- Height
- at 43,000 ft
- Aircraft
- CL35
- Remarks
- mtw +/-300FT zdvwc
- GLF6 at 40,000 ft, 20 nm north, 7:48 pm CDT (00:48 UTC): light to moderate chop turbulence, remarks: ZDVWC-46. At the destination end, 20 nm north of the line.
as filed, and in English
COS UA /OV COS340020/TM 0048/FL400/TP GLF6/TB LGT-MOD CHOP/RM ZDVWC-46
- Report
- a routine report filed through COS
- Where
- 20 nm north (340°) of COS
- Time
- 00:48 UTC
- Height
- at 40,000 ft
- Aircraft
- GLF6
- Turbulence
- light to moderate chop
- Remarks
- ZDVWC-46
- B737 at 25,000 ft, 11 nm west, 7:29 pm CDT (00:29 UTC): light rime icing, 0 °C, remarks: during the climb ZDVWC-29. At the destination end, 11 nm west of the line.
as filed, and in English
COS UA /OV BRK242015/TM 0029/FL250/TP B737/SK TOP280/TA 00/IC LGT RIME/RM DURC ZDVWC-29
- Report
- a routine report filed through COS
- Where
- 15 nm southwest (242°) of BRK
- Time
- 00:29 UTC
- Height
- at 25,000 ft
- Aircraft
- B737
- Sky
- TOP280
- Temperature
- 0 °C
- Icing
- light rime
- Remarks
- during the climb ZDVWC-29
- B737 at 14,000 ft, 36 nm north, 7:20 pm CDT (00:20 UTC): light to moderate turbulence, remarks: light to moderate from 14,000 ft to 16,000 ft occn light above 16,000 ft. At the destination end, 36 nm north of the line.
as filed, and in English
DEN UA /OV DEN170025/TM 0020/FL140/TP B737/TB LGT-MOD/RM LGT-MOD 140-160 OCCN LGT ABOVE 160
- Report
- a routine report filed through DEN
- Where
- 25 nm south (170°) of DEN
- Time
- 00:20 UTC
- Height
- at 14,000 ft
- Aircraft
- B737
- Turbulence
- light to moderate
- Remarks
- light to moderate from 14,000 ft to 16,000 ft occn light above 16,000 ft
Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 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 5 forecast points nearest it (ABI, LBB, AMA, TCC, PUB). 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 | 190° at 26 kt | −20 kt | 18 °C | 140 kt | 4 h 06 min | 11:07 pm MDT (05:07 UTC) |
| 6,500 ft | 190° at 25 kt | −18 kt | 17 °C | 138 kt | 4 h 10 min | 11:11 pm MDT (05:11 UTC) |
| 8,500 ft | 210° at 23 kt | −9 kt | 14 °C | 129 kt | 4 h 27 min | 11:28 pm MDT (05:28 UTC) |
| 10,500 ft | 220° at 24 kt | −6 kt | 10 °C | 126 kt | 4 h 33 min | 11:34 pm MDT (05:34 UTC) |
| 12,500 ft | 230° at 26 kt | −4 kt | 7 °C | 124 kt | 4 h 38 min | 11:39 pm MDT (05:39 UTC) |
| 14,500 ft | 230° at 27 kt | −2 kt | 2 °C | 122 kt | 4 h 42 min | 11:43 pm MDT (05:43 UTC) |
| 16,500 ft | 230° at 29 kt | −1 kt | -3 °C | 121 kt | 4 h 45 min | 11:46 pm MDT (05:46 UTC) |
| 18,000 ft FL180 | 240° at 30 kt | +1 kt | -6 °C | 119 kt | 4 h 49 min | 11:50 pm MDT (05:50 UTC) |
| 24,000 ft FL240 | 240° at 34 kt | +5 kt | -17 °C | 115 kt | 4 h 59 min | 12:00 am MDT (06:00 UTC) |
| 30,000 ft FL300 | 240° at 52 kt | +8 kt | -28 °C | 112 kt | 5 h 08 min | 12:09 am MDT (06:09 UTC) |
| 34,000 ft FL340 | 250° at 51 kt | +16 kt | -38 °C | 104 kt | 5 h 31 min | 12:32 am MDT (06:32 UTC) |
| 39,000 ft FL390 | 260° at 45 kt | +19 kt | -50 °C | 101 kt | 5 h 41 min | 12:42 am MDT (06:42 UTC) |
Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ABI | used from 0 nm out; 101 nm from the line | 180/26 17° | 220/18 12° | 230/25 8° | 230/28 -5° | 240/29 -14° | 250/35 -28° | 270/37 -39° | 280/37 -51° | |
| LBB | used from 198 nm out; 78 nm from the line | 180/26 20° | 210/21 13° | 230/21 7° | 250/25 -5° | 250/34 -16° | 250/52 -28° | 260/47 -38° | 260/49 -50° | |
| AMA | used from 248 nm out; 46 nm from the line | 190/28 | 220/26 14° | 230/27 7° | 250/24 -6° | 250/32 -16° | 240/51 -28° | 250/52 -38° | 250/51 -50° | |
| TCC | used from 396 nm out; 105 nm from the line | 200/26 | 200/28 14° | 220/25 7° | 230/28 -7° | 240/41 -19° | 240/62 -28° | 250/61 -37° | 250/49 -49° | |
| PUB | used from 446 nm out; 75 nm from the line | 210/24 16° | 210/28 8° | 230/43 -8° | 240/42 -21° | 240/77 -30° | 240/72 -36° | 250/51 -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 |
|---|---|---|---|---|---|---|---|
| GRK Fort Hood (Killeen), TX | departure | VFR | from the south-southeast (160°) at 4 knots | 10+ mi | none | 1,015 ft | 7:55 pm CDT (00:55 UTC) |
| MNZ Hamilton, TX | 40 nm out, 7 nm northeast of the line | VFR | from the south-southeast (160°) at 6 knots | 10+ mi | none | 1,304 ft | 00:55 UTC |
| MKN Comanche, TX | 69 nm out, 6 nm south of the line | reported, no category | calm | 10+ mi | none | 1,386 ft | 00:55 UTC |
| CDS Childress, TX | 238 nm out, 13 nm northeast of the line | VFR | from the south (170°) at 7 knots | 10+ mi | none | 1,953 ft | 00:53 UTC |
| AMA Amarillo, TX | 317 nm out, 16 nm southwest of the line, tower | VFR | from the south (170°) at 14 knots | 10+ mi | none | 3,606 ft | 00:53 UTC |
| DUX Dumas, TX | 356 nm out, 5 nm southwest of the line | VFR | from the south (180°) at 15 knots | 10+ mi | none | 3,706 ft | 00:35 UTC |
| LHX La Junta, CO | 505 nm out, 17 nm northeast of the line | VFR | from the southwest (230°) at 6 knots | 10+ mi | none | 4,228 ft | 15:53 UTC |
| PUB Pueblo, CO | 545 nm out, 12 nm southwest of the line, tower | VFR Sky: a few clouds at 12,000 feet | from the west (280°) at 12 knots | 10+ mi | none | 4,729 ft | 00:53 UTC |
| COS Colorado Springs, CO | destination | VFR Sky: a few clouds at 7,000 feet, a broken layer at 10,000 feet, a broken layer at 17,000 feet, a broken layer at 20,000 feet | from the west-southwest (240°) at 14 knots, gusting to 25 | 10+ mi | 10,000 ft | 6,187 ft | 6:54 pm MDT (00:54 UTC) |
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 COS when you get there the forecast at the estimated arrival, 11:07 pm MDT (05:07 UTC)
Wind from the south at 12 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 20,000 feet VFR
The whole forecast for COS
- From Sun 6:00 pm MDT (00:00 UTC): wind from the south-southwest at 20 knots, gusting to 32, visibility more than 6 miles, a few clouds at 10,000 feet, scattered clouds at 20,000 feet
- From Sun 9:00 pm MDT (03:00 UTC): wind from the south at 12 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 20,000 feet
- From Mon 6:00 am MDT (12:00 UTC): wind from the north-northeast at 8 knots, visibility more than 6 miles, clear skies
- From Mon 11:00 am MDT (17:00 UTC): wind from the south at 15 knots, gusting to 25, visibility more than 6 miles, scattered clouds at 12,000 feet
The forecast for GRK, the departure
- From Sun 7:00 pm CDT (00:00 UTC): wind from the south-southeast at 9 knots, scattered clouds at 6,000 feet
- Changing between Mon 3:00 am CDT (08:00 UTC) and 4:00 am CDT (09:00 UTC) to: wind from the southeast at 6 knots, a broken layer at 1,500 feet
- Changing between Mon 4:00 pm CDT (21:00 UTC) and 5:00 pm CDT (22:00 UTC) to: wind from the south-southeast at 12 knots, a broken layer at 5,000 feet
- Changing between Mon 10:00 pm CDT (03:00 UTC) and 11:00 pm CDT (04:00 UTC) to: wind from the south-southeast at 9 knots, a broken layer at 1,500 feet
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 destination end · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 12 October · ZDV
Daylight
Sunset at GRK 7:03 pm CDT (00:03 UTC), at COS 6:25 pm MDT (00:25 UTC) (civil twilight ends 6:51 pm MDT (00:51 UTC)). At 120 knots the arrival at COS is before sunrise there (7:04 am MDT (13:04 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: Robert Gray Army Airfield, City Of Colorado Springs Municipal.