Denver International to Casper/Natrona County International DEN → CPR
200 nautical miles (230 statute miles) northwest on a straight line, true course 337°, about 329° magnetic at the departure end (variation 8E). At 120 knots that is 1 h 27 min at the quickest height in today's winds (24,000 ft, a 18-knot tailwind), arriving about 2:31 am MDT (08:31 UTC), after sunset at the destination. Right now DEN is VFR, wind from the south-southwest (210°) at 24 knots, gusting to 32; CPR is VFR, wind from the north-northwest (330°) at 10 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: 5,178 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 above 18,000 ft from 18,000 ft to 38,000 ft. Over the whole route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the whole route.
- AIRMET TANGO 1W: 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 last 130 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the last 30 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). 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 DEN.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B38M at 30,000 ft, 42 nm southwest, 11:45 pm MDT (05:45 UTC): moderate chop turbulence. 190 nm along the route, 42 nm southwest of the line.
as filed, and in English
RIW UA /OV BOY126080/TM 0545/FL300/TP B38M/TB CONS MOD CHOP /ZLC
- Report
- a routine report filed through RIW
- Where
- 80 nm southeast (126°) of BOY
- Time
- 05:45 UTC
- Height
- at 30,000 ft
- Aircraft
- B38M
- Turbulence
- continuous moderate chop zlc
- B738 descending, 3 nm south, 12:15 am MDT (06:15 UTC): light chop turbulence. At the departure end, 3 nm south of the line.
as filed, and in English
DEN UA /OV DEN/TM 0615/FLDURD/TP B738/TB LGT CHOP
- Report
- a routine report filed through DEN
- Where
- over DEN
- Time
- 06:15 UTC
- Height
- during the descent
- Aircraft
- B738
- Turbulence
- light chop
- A20N at 25,000 ft, 45 nm southwest, 12:19 am MDT (06:19 UTC): light chop turbulence up to 26,000 ft, remarks: during the climb ZDVWC-06. 10 nm along the route, 45 nm southwest of the line.
as filed, and in English
DEN UA /OV DEN250045/TM 0619/FL250/TP A20N/TB OCNL LGT CHOP BLO 260/RM DURC. ZDVWC-06
- Report
- a routine report filed through DEN
- Where
- 45 nm west (250°) of DEN
- Time
- 06:19 UTC
- Height
- at 25,000 ft
- Aircraft
- A20N
- Turbulence
- occasional light chop below 26,000 ft
- Remarks
- during the climb ZDVWC-06
- B38M at 21,500 ft, 27 nm southwest, 10:33 pm MDT (04:33 UTC): light turbulence up to 25,000 ft, remarks: during the descent flati star ZDVWC-13. 60 nm along the route, 27 nm southwest of the line.
as filed, and in English
DEN UA /OV DEN305065/TM 0433/FL215/TP B38M/TB LGT BLO 250/RM DURD FLATI STAR. ZDVWC-13
- Report
- a routine report filed through DEN
- Where
- 65 nm northwest (305°) of DEN
- Time
- 04:33 UTC
- Height
- at 21,500 ft
- Aircraft
- B38M
- Turbulence
- light below 25,000 ft
- Remarks
- during the descent flati star ZDVWC-13
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 (DEN, BFF, LND). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 8,500 ft | 220° at 23 kt | −9 kt | 11 °C | 129 kt | 1 h 33 min | 2:37 am MDT (08:37 UTC) |
| 10,500 ft | 230° at 30 kt | −8 kt | 9 °C | 128 kt | 1 h 34 min | 2:38 am MDT (08:38 UTC) |
| 12,500 ft | 230° at 36 kt | −8 kt | 4 °C | 128 kt | 1 h 34 min | 2:38 am MDT (08:38 UTC) |
| 14,500 ft | 230° at 38 kt | −11 kt | -1 °C | 131 kt | 1 h 32 min | 2:36 am MDT (08:36 UTC) |
| 16,500 ft | 220° at 40 kt | −15 kt | -5 °C | 135 kt | 1 h 29 min | 2:33 am MDT (08:33 UTC) |
| 18,000 ft FL180 | 220° at 42 kt | −17 kt | -9 °C | 137 kt | 1 h 28 min | 2:32 am MDT (08:32 UTC) |
| 24,000 ft FL240 | 220° at 44 kt | −18 kt | -21 °C | 138 kt | 1 h 27 min | 2:31 am MDT (08:31 UTC) |
| 30,000 ft FL300 | 230° at 50 kt | −18 kt | -30 °C | 138 kt | 1 h 27 min | 2:31 am MDT (08:31 UTC) |
| 34,000 ft FL340 | 230° at 56 kt | −12 kt | -36 °C | 132 kt | 1 h 31 min | 2:35 am MDT (08:35 UTC) |
| 39,000 ft FL390 | 240° at 55 kt | −7 kt | -45 °C | 127 kt | 1 h 34 min | 2:38 am MDT (08:38 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| DEN | used from 0 nm out; 25 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° | ||
| BFF | used from 100 nm out; 98 nm from the line | 180/28 | 220/33 15° | 210/31 7° | 230/32 -9° | 220/41 -21° | 220/40 -33° | 240/47 -36° | 250/54 -46° | |
| LND | used from 150 nm out; 112 nm from the line | 200/23 6° | 220/31 1° | 220/39 -11° | 230/39 -23° | 220/51 -28° | 220/66 -37° | 230/68 -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 |
|---|---|---|---|---|---|---|---|
| DEN Denver, CO | departure | VFR Sky: a few clouds at 6,000 feet, a broken layer at 18,000 feet | from the south-southwest (210°) at 24 knots, gusting to 32 | 10+ mi | 18,000 ft | 5,433 ft | 12:53 am MDT (06:53 UTC) |
| FNL Fort Collins/Loveland, CO | 40 nm out, 1 nm south of the line, tower | VFR | from the south (170°) at 7 knots | 10+ mi | none | 5,020 ft | 06:56 UTC |
| LAR Laramie, WY | 100 nm out, 7 nm southwest of the line | VFR | from the southwest (220°) at 13 knots, gusting to 32 | 10+ mi | none | 7,283 ft | 06:53 UTC |
| CPR Casper, WY | destination | VFR | from the north-northwest (330°) at 10 knots | 8 mi | none | 5,344 ft | 12:53 am MDT (06:53 UTC) |
The highest airport on this list sits at 7,283 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At CPR when you get there the forecast at the estimated arrival, 2:31 am MDT (08:31 UTC)
Wind from the south-southwest at 11 knots, visibility more than 6 miles, a broken layer at 10,000 feet VFR
30% chance between Mon 12:00 am MDT (06:00 UTC) and 4:00 am MDT (10:00 UTC): visibility 5 miles, light rain showers, a broken layer at 3,000 feet marginal VFR
The whole forecast for CPR
- From Mon 12:00 am MDT (06:00 UTC): wind from the south-southwest at 11 knots, visibility more than 6 miles, a broken layer at 10,000 feet
- 30% chance between Mon 12:00 am MDT (06:00 UTC) and 4:00 am MDT (10:00 UTC): visibility 5 miles, light rain showers, a broken layer at 3,000 feet
- From Mon 9:00 am MDT (15:00 UTC): wind from the north at 8 knots, visibility more than 6 miles, scattered clouds at 2,000 feet, a broken layer at 3,500 feet
- From Mon 3:00 pm MDT (21:00 UTC): wind from the north-northeast at 10 knots, visibility more than 6 miles, light rain showers, scattered clouds at 1,500 feet, a broken layer at 5,000 feet and more above
- From Mon 6:00 pm MDT (00:00 UTC): wind from the northeast at 10 knots, visibility 6 miles, light rain showers, scattered clouds at 1,000 feet, a broken layer at 2,000 feet and more above
- 30% chance between Mon 6:00 pm MDT (00:00 UTC) and 12:00 am MDT (06:00 UTC): visibility 4 miles, rain, a broken layer at 1,200 feet
The forecast for DEN, the departure
- From Mon 12:00 am MDT (06:00 UTC): wind from the south-southwest at 15 knots, gusting to 25, visibility more than 6 miles, a few clouds at 14,000 feet
- From Mon 3:00 am MDT (09:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a few clouds at 22,000 feet
- From Mon 10:00 am MDT (16:00 UTC): wind from the southwest at 14 knots, gusting to 21, visibility more than 6 miles, clear skies
- From Mon 4:00 pm MDT (22:00 UTC): wind from the south at 9 knots, visibility more than 6 miles, clear skies
- From Mon 7:00 pm MDT (01:00 UTC): wind from the northeast at 8 knots, visibility more than 6 miles, a few clouds at 15,000 feet
- From Mon 11:00 pm MDT (05:00 UTC): wind from the north at 10 knots, visibility more than 6 miles, a few clouds at 3,000 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 DEN 6:22 pm MDT (00:22 UTC), at CPR 6:26 pm MDT (00:26 UTC) (civil twilight ends 6:55 pm MDT (00:55 UTC)). At 120 knots the arrival at CPR is before sunrise there (7:15 am MDT (13:15 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: Denver International, Casper/Natrona County International.