Casper/Natrona County International to Rapid City Regional CPR → RAP
163 nautical miles (188 statute miles) northeast on a straight line, true course 064°, about 052° magnetic at the departure end (variation 12E). At 120 knots that is 57 min at the quickest height in today's winds (34,000 ft, a 52-knot tailwind), arriving about 9:00 pm MDT (03:00 UTC), after sunset at the destination. Right now CPR is VFR, wind from the northwest (310°) at 7 knots; RAP is low IFR, wind from the east (090°) at 7 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 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 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 first 38 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the whole route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 77 nm of the route.
- AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, 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 CPR.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent CRJ2 at 7,000 ft, 2 nm northeast, 7:04 pm MDT (01:04 UTC): moderate turbulence, remarks: low-level wind shear dept runway 03 gain/loss unknown. At the departure end, 2 nm northeast of the line.
as filed, and in English
CPR UUA /OV CPR035002/TM 0104/FL070/TP CRJ2/TB CONT MOD TURB/RM LLWS DEPT RY03 GAIN/LOSS UNKN
- Report
- an urgent report filed through CPR
- Where
- 2 nm northeast (035°) of CPR
- Time
- 01:04 UTC
- Height
- at 7,000 ft
- Aircraft
- CRJ2
- Turbulence
- continuous moderate turbulence
- Remarks
- low-level wind shear dept runway 03 gain/loss unknown
- BE9L at 21,000 ft, 47 nm southeast, 5:22 pm MDT (23:22 UTC): light chop turbulence above 21,000 ft, moderate icing above 21,000 ft, -21 °C, remarks: zdvwc. 29 nm along the route, 47 nm southeast of the line.
as filed, and in English
DGW UA /OV IIP200020/TM 2322/FL210/TP BE9L/SK BASE 200/TA M21/TB OCNL LGT CHOP 210/IC MOD MIX 210/RM ZDVWC
- Report
- a routine report filed through DGW
- Where
- 20 nm south (200°) of IIP
- Time
- 23:22 UTC
- Height
- at 21,000 ft
- Aircraft
- BE9L
- Sky
- base 20,000 ft
- Temperature
- −21 °C
- Turbulence
- occasional light chop at 21,000 ft
- Icing
- moderate mix at 21,000 ft
- Remarks
- zdvwc
- CRJ2 at 9,000 ft, 15 nm southwest, 6:35 pm MDT (00:35 UTC): light chop turbulence, vmc, remarks: occasional moderate turbulence at at 15,000 ft. At the departure end, 15 nm southwest of the line.
as filed, and in English
CPR UA /OV CPR215015/TM 0035/FL090/TP CRJ2/WX VMC/TB LGT CHOP/RM OCNL MOD TURB AT 150
- Report
- a routine report filed through CPR
- Where
- 15 nm southwest (215°) of CPR
- Time
- 00:35 UTC
- Height
- at 9,000 ft
- Aircraft
- CRJ2
- Weather
- visual conditions
- Turbulence
- light chop
- Remarks
- occasional moderate turbulence at at 15,000 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 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 2 forecast points nearest it (LND, RAP). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 5,500 ft | 120° at 15 kt | +9 kt | 12 °C | 111 kt | 1 h 28 min | 9:31 pm MDT (03:31 UTC) |
| 7,500 ft | 170° at 21 kt | −4 kt | 11 °C | 124 kt | 1 h 19 min | 9:22 pm MDT (03:22 UTC) |
| 9,500 ft | 190° at 26 kt | −13 kt | 10 °C | 133 kt | 1 h 14 min | 9:17 pm MDT (03:17 UTC) |
| 11,500 ft | 200° at 30 kt | −23 kt | 5 °C | 143 kt | 1 h 08 min | 9:11 pm MDT (03:11 UTC) |
| 13,500 ft | 210° at 34 kt | −28 kt | 1 °C | 148 kt | 1 h 06 min | 9:09 pm MDT (03:09 UTC) |
| 15,500 ft | 220° at 37 kt | −33 kt | -3 °C | 153 kt | 1 h 04 min | 9:07 pm MDT (03:07 UTC) |
| 17,500 ft | 220° at 41 kt | −37 kt | -8 °C | 157 kt | 1 h 02 min | 9:05 pm MDT (03:05 UTC) |
| 18,000 ft FL180 | 220° at 41 kt | −38 kt | -9 °C | 158 kt | 1 h 02 min | 9:05 pm MDT (03:05 UTC) |
| 24,000 ft FL240 | 230° at 41 kt | −39 kt | -22 °C | 159 kt | 1 h 02 min | 9:05 pm MDT (03:05 UTC) |
| 30,000 ft FL300 | 230° at 44 kt | −42 kt | -36 °C | 162 kt | 1 h | 9:03 pm MDT (03:03 UTC) |
| 34,000 ft FL340 | 240° at 52 kt | −52 kt | -40 °C | 172 kt | 57 min | 9:00 pm MDT (03:00 UTC) |
| 39,000 ft FL390 | 240° at 52 kt | −52 kt | -47 °C | 172 kt | 57 min | 9:00 pm MDT (03:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| LND | used from 0 nm out; 122 nm from the line | 180/33 10° | 190/50 3° | 210/59 -9° | 200/50 -21° | 190/41 -34° | 230/55 -39° | 240/65 -47° | ||
| RAP | used from 48 nm out; 91 nm from the line | 120/15 12° | 180/22 11° | 220/26 5° | 230/35 -9° | 240/40 -22° | 240/50 -37° | 240/51 -41° | 240/47 -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 |
|---|---|---|---|---|---|---|---|
| CPR Casper, WY | departure | VFR Sky: a few clouds at 11,000 feet | from the northwest (310°) at 7 knots | 10+ mi | none | 5,344 ft | 7:53 pm MDT (01:53 UTC) |
| ECS Newcastle, WY | 106 nm out, 14 nm north of the line | VFR Sky: scattered clouds at 11,000 feet | from the southwest (220°) at 5 knots | 10+ mi | none | 4,177 ft | 01:55 UTC |
| CUT Custer, SD | 135 nm out, 7 nm south of the line | VFR | from the north-northeast (030°) at 5 knots | 10+ mi | none | 5,619 ft | 01:53 UTC |
| RAP Rapid City, SD | destination | low IFR Sky: overcast at 300 feet Weather: mist | from the east (090°) at 7 knots | 2.5 mi | 300 ft | 3,203 ft | 7:52 pm MDT (01:52 UTC) |
The highest airport on this list sits at 5,619 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At RAP when you get there the forecast at the estimated arrival, 9:00 pm MDT (03:00 UTC)
Wind from the east-southeast at 10 knots, gusting to 20, visibility 2 miles, mist, a broken layer at 600 feet IFR
The whole forecast for RAP
- From Sun 8:00 pm MDT (02:00 UTC): wind from the east-southeast at 10 knots, gusting to 20, visibility 2 miles, mist, a broken layer at 600 feet
- 30% chance between Sun 10:00 pm MDT (04:00 UTC) and 2:00 am MDT (08:00 UTC): visibility 3 miles, light rain showers, mist, scattered clouds at 800 feet, a broken layer at 1,500 feet
- From Mon 10:00 am MDT (16:00 UTC): wind from the north-northwest at 20 knots, gusting to 30, visibility more than 6 miles, a few clouds at 1,500 feet, scattered clouds at 3,500 feet
The forecast for CPR, the departure
- From Sun 6:00 pm MDT (00:00 UTC): wind from the east-northeast at 12 knots, gusting to 18, visibility more than 6 miles, scattered clouds at 4,000 feet, overcast at 8,000 feet
- At times between Sun 6:00 pm MDT (00:00 UTC) and 10:00 pm MDT (04:00 UTC): visibility 5 miles, light rain, a broken layer at 3,000 feet
- From Sun 10:00 pm MDT (04:00 UTC): wind from the south-southwest at 12 knots, gusting to 22, visibility more than 6 miles, a broken layer at 10,000 feet
- 30% chance between Sun 10:00 pm MDT (04:00 UTC) and 4:00 am MDT (10:00 UTC): visibility 5 miles, light rain, a broken layer at 3,000 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind from the west at 10 knots, visibility more than 6 miles, scattered clouds at 5,000 feet, a broken layer at 15,000 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 CPR 6:28 pm MDT (00:28 UTC), at RAP 6:13 pm MDT (00:13 UTC) (civil twilight ends 6:42 pm MDT (00:42 UTC)). At 120 knots the arrival at RAP is after sunset there (6:15 pm MDT (00:15 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: Casper/Natrona County International, Rapid City Regional.