Casper/Natrona County International to Southwest Wyoming Regional CPR → RKS
140 nautical miles (161 statute miles) southwest on a straight line, true course 237°, about 225° magnetic at the departure end (variation 12E). At 120 knots that is 1 h 26 min at the quickest height in today's winds (8,500 ft, a 22-knot headwind), arriving about 7:13 pm MDT (01:13 UTC), after sunset at the destination. Right now CPR is VFR, wind from the east (100°) at 7 knots; RKS is VFR, wind from the south (190°) 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: 546 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 W66W: thunderstorms (a convective SIGMET) up to 38,000 ft, moving from the southwest at 40 knots, until 6:55 pm MDT (00:55 UTC). Near the route, at the destination end.
as issued
WSUS33 KKCI 112255 MKCW WST 112255 CONVECTIVE SIGMET 66W VALID UNTIL 0055Z CO WY UT FROM 10NW OCS-60W CHE-50ESE MTU-50N MTU-10NW OCS AREA TS MOV FROM 21040KT. TOPS TO FL380.
- 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 whole 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 whole route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the whole route.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 130 nm along 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 CPR.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B738 at 37,000 ft, 46 nm southeast, 3:10 pm MDT (21:10 UTC): moderate chop turbulence, remarks: mtw a 40-knot loss of airspeed zdvwc. 30 nm along the route, 46 nm southeast of the line.
as filed, and in English
LAR UA /OV MBW290020/TM 2110/FL370/TP B738/TB MOD CHOP/RM MTW +/-40KT ZDVWC
- Report
- a routine report filed through LAR
- Where
- 20 nm west (290°) of MBW
- Time
- 21:10 UTC
- Height
- at 37,000 ft
- Aircraft
- B738
- Turbulence
- moderate chop
- Remarks
- mtw a 40-knot loss of airspeed zdvwc
- PC12 at 12,000 ft, 4 nm southwest, 4:00 pm MDT (22:00 UTC): light chop turbulence, no icing, overcast above 12,500 ft. 20 nm along the route, 4 nm southwest of the line.
as filed, and in English
CPR UA /OV CPR220024/TM 2200/FL120/TP PC12/SK OVC125/TB LGT CHOP/IC NEG
- Report
- a routine report filed through CPR
- Where
- 24 nm southwest (220°) of CPR
- Time
- 22:00 UTC
- Height
- at 12,000 ft
- Aircraft
- PC12
- Sky
- overcast from 12,500 ft
- Turbulence
- light chop
- Icing
- none
- A320 at 33,000 ft, 27 nm northwest, 4:24 pm MDT (22:24 UTC): light to moderate turbulence. At the destination end, 27 nm northwest of the line.
as filed, and in English
RKS UA /OV OCS306029/TM 2224/FL330/TP A320/TB CONS LGT OCNL MOD /ZLC
- Report
- a routine report filed through RKS
- Where
- 29 nm northwest (306°) of OCS
- Time
- 22:24 UTC
- Height
- at 33,000 ft
- Aircraft
- A320
- Turbulence
- continuous light occasional moderate zlc
- B738 at 35,200 ft, 2 nm east, 2:56 pm MDT (20:56 UTC): remarks: mdt mountain wave a 10-knot loss of airspeed knots zlc. At the destination end, 2 nm east of the line.
as filed, and in English
RKS UA /OV OCS/TM 2056/FL352/TP B738/RM MDT MTN WAVE +-10 KTS /ZLC
- Report
- a routine report filed through RKS
- Where
- over OCS
- Time
- 20:56 UTC
- Height
- at 35,200 ft
- Aircraft
- B738
- Remarks
- mdt mountain wave a 10-knot loss of airspeed knots zlc
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 2 forecast points nearest it (LND, RKS). 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 | 180° at 36 kt | +22 kt | 10 °C | 98 kt | 1 h 26 min | 7:13 pm MDT (01:13 UTC) |
| 10,500 ft | 190° at 44 kt | +32 kt | 6 °C | 88 kt | 1 h 35 min | 7:22 pm MDT (01:22 UTC) |
| 12,500 ft | 200° at 54 kt | +42 kt | 2 °C | 78 kt | 1 h 48 min | 7:35 pm MDT (01:35 UTC) |
| 14,500 ft | 200° at 55 kt | +46 kt | -2 °C | 74 kt | 1 h 54 min | 7:41 pm MDT (01:41 UTC) |
| 16,500 ft | 210° at 57 kt | +50 kt | -6 °C | 70 kt | 2 h | 7:47 pm MDT (01:47 UTC) |
| 18,000 ft FL180 | 210° at 58 kt | +52 kt | -9 °C | 68 kt | 2 h 04 min | 7:51 pm MDT (01:51 UTC) |
| 24,000 ft FL240 | 200° at 52 kt | +43 kt | -21 °C | 77 kt | 1 h 49 min | 7:36 pm MDT (01:36 UTC) |
| 30,000 ft FL300 | 200° at 42 kt | +32 kt | -34 °C | 88 kt | 1 h 35 min | 7:22 pm MDT (01:22 UTC) |
| 34,000 ft FL340 | 230° at 57 kt | +57 kt | -38 °C | 63 kt | 2 h 13 min | 8:00 pm MDT (02:00 UTC) |
| 39,000 ft FL390 | 240° at 68 kt | +68 kt | -47 °C | 52 kt | 2 h 42 min | 8:29 pm MDT (02:29 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; 80 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° | ||
| RKS | used from 100 nm out; 20 nm from the line | 190/43 | 210/65 3° | 210/57 -9° | 210/56 -21° | 210/47 -33° | 230/63 -37° | 240/77 -46° |
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: overcast at 10,000 feet | from the east (100°) at 7 knots | 10+ mi | 10,000 ft | 5,344 ft | 4:53 pm MDT (22:53 UTC) |
| RKS Rock Springs, WY | destination | VFR Sky: a few clouds at 2,700 feet, a broken layer at 6,500 feet, overcast at 11,000 feet Weather: light rain | from the south (190°) at 10 knots | 10+ mi | 6,500 ft | 6,764 ft | 5:26 pm MDT (23:26 UTC) |
The highest airport on this list sits at 6,764 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At RKS when you get there the forecast at the estimated arrival, 7:13 pm MDT (01:13 UTC)
Wind from the south-southwest at 30 knots, gusting to 45, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 15,000 feet VFR
The whole forecast for RKS
- From Sun 6:00 pm MDT (00:00 UTC): wind from the south-southwest at 30 knots, gusting to 45, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 15,000 feet
- From Sun 10:00 pm MDT (04:00 UTC): wind from the south-southwest at 30 knots, gusting to 45, visibility more than 6 miles, light rain, scattered clouds at 2,000 feet, overcast at 4,000 feet
- From Mon 2:00 am MDT (08:00 UTC): wind from the south-southwest at 10 knots, visibility more than 6 miles, light rain showers, scattered clouds at 2,000 feet, a broken layer at 3,000 feet and more above
- From Mon 5:00 am MDT (11:00 UTC): wind from the southwest at 5 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,000 feet, a broken layer at 3,000 feet and more above
- From Mon 10:00 am MDT (16:00 UTC): wind from the south at 10 knots, visibility more than 6 miles, light rain showers, scattered clouds at 2,000 feet, overcast at 4,000 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 RKS 6:40 pm MDT (00:40 UTC) (civil twilight ends 7:07 pm MDT (01:07 UTC)). At 120 knots the arrival at RKS is after sunset there (6:41 pm MDT (00:41 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, Southwest Wyoming Regional.