Rapid City Regional to Boise Air Trml/Gowen Field RAP → BOI
571 nautical miles (657 statute miles) west on a straight line, true course 272°, about 264° magnetic at the departure end (variation 8E). At 120 knots that is 4 h 48 min at the quickest height in today's winds (4,500 ft, a 1-knot headwind), arriving about 6:14 am MDT (12:14 UTC), after sunset at the destination. Right now RAP is low IFR, wind from the east (090°) at 10 knots; BOI is VFR, wind from the west-northwest (290°) 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: 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 C13C: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 40 knots, until 2:55 am MDT (08:55 UTC). Over the first 10 nm of the route.
as issued
WSUS32 KKCI 120655 MKCC WST 120655 CONVECTIVE SIGMET 13C VALID UNTIL 0855Z SD FROM 50NW DPR-30ESE DPR-20SE RAP-50WNW RAP-50NW DPR AREA TS MOV FROM 22040KT. TOPS TO FL300.
- AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the first 512 nm of the 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 route from 20 to 236 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the route from 30 to 256 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 69 to 275 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 118 to 551 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 157 to 531 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 138 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 RAP.
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 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 4 forecast points nearest it (RAP, LND, PIH, BOI). 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 8 kt | +1 kt | 9 °C | 119 kt | 4 h 48 min | 6:14 am MDT (12:14 UTC) |
| 6,500 ft | 200° at 10 kt | +3 kt | 8 °C | 117 kt | 4 h 53 min | 6:19 am MDT (12:19 UTC) |
| 8,500 ft | 210° at 19 kt | +9 kt | 7 °C | 111 kt | 5 h 09 min | 6:35 am MDT (12:35 UTC) |
| 10,500 ft | 210° at 23 kt | +13 kt | 3 °C | 107 kt | 5 h 20 min | 6:46 am MDT (12:46 UTC) |
| 12,500 ft | 220° at 27 kt | +17 kt | -1 °C | 103 kt | 5 h 33 min | 6:59 am MDT (12:59 UTC) |
| 14,500 ft | 220° at 32 kt | +20 kt | -6 °C | 100 kt | 5 h 43 min | 7:09 am MDT (13:09 UTC) |
| 16,500 ft | 220° at 36 kt | +23 kt | -10 °C | 97 kt | 5 h 53 min | 7:19 am MDT (13:19 UTC) |
| 18,000 ft FL180 | 220° at 40 kt | +25 kt | -13 °C | 95 kt | 6 h 01 min | 7:27 am MDT (13:27 UTC) |
| 24,000 ft FL240 | 220° at 49 kt | +31 kt | -24 °C | 89 kt | 6 h 25 min | 7:51 am MDT (13:51 UTC) |
| 30,000 ft FL300 | 220° at 55 kt | +38 kt | -31 °C | 82 kt | 6 h 58 min | 8:24 am MDT (14:24 UTC) |
| 34,000 ft FL340 | 230° at 62 kt | +47 kt | -36 °C | 73 kt | 7 h 49 min | 9:15 am MDT (15:15 UTC) |
| 39,000 ft FL390 | 230° at 61 kt | +49 kt | -44 °C | 71 kt | 8 h 03 min | 9:29 am MDT (15:29 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| RAP | used from 0 nm out; 25 nm from the line | 180/23 12° | 200/38 13° | 210/38 6° | 220/28 -10° | 230/34 -21° | 230/37 -36° | 250/52 -38° | 250/59 -46° | |
| LND | used from 148 nm out; 105 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° | ||
| PIH | used from 344 nm out; 74 nm from the line | L/V | 240/13 1° | 240/15 -3° | 210/42 -15° | 200/70 -25° | 220/74 -29° | 220/71 -36° | 220/62 -43° | |
| BOI | used from 492 nm out; 54 nm from the line | 300/7 2° | 280/5 -4° | 210/16 -9° | 210/60 -20° | 210/75 -29° | 210/63 -32° | 220/64 -32° | 220/54 -39° |
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 |
|---|---|---|---|---|---|---|---|
| RAP Rapid City, SD | departure | low IFR Sky: overcast at 300 feet Weather: mist | from the east (090°) at 10 knots | 0.75 mi | 300 ft | 3,203 ft | 1:19 am MDT (07:19 UTC) |
| ECS Newcastle, WY | 49 nm out, 12 nm southwest of the line | VFR | calm | 10+ mi | none | 4,177 ft | 07:15 UTC |
| GCC Gillette, WY | 108 nm out, 17 nm north of the line | low IFR Sky: overcast at 200 feet Weather: mist | calm | 1 mi | 200 ft | 4,365 ft | 07:23 UTC |
| BYG Buffalo, WY | 157 nm out, 19 nm north of the line | low IFR Sky: overcast at 200 feet Weather: mist | from the north-northwest (330°) at 11 knots | 1.75 mi | 200 ft | 4,970 ft | 07:14 UTC |
| WRL Worland, WY | 207 nm out, 7 nm southwest of the line | IFR Sky: overcast at 500 feet | from the north-northwest (340°) at 7 knots | 10+ mi | 500 ft | 4,251 ft | 07:22 UTC |
| JAC Jackson, WY | 334 nm out, 21 nm south of the line, tower | VFR Sky: scattered clouds at 4,600 feet, a broken layer at 5,500 feet, a broken layer at 7,000 feet | from the southwest (220°) at 6 knots | 10+ mi | 5,500 ft | 6,451 ft | 06:56 UTC |
| IDA Idaho Falls, ID | 394 nm out, 22 nm south of the line, tower | marginal VFR Sky: overcast at 1,800 feet | from the north-northwest (340°) at 8 knots | 10+ mi | 1,800 ft | 4,743 ft | 06:53 UTC |
| AOC Arco, ID | 443 nm out, 12 nm south of the line | no report just now | 5,334 ft | ||||
| SUN Hailey, ID | 492 nm out, 14 nm southeast of the line, tower | low IFR Sky: overcast at 400 feet | from the east-southeast (120°) at 6 knots | 7 mi | 400 ft | 5,319 ft | 07:15 UTC |
| BOI Boise, ID | destination | VFR Sky: overcast at 9,000 feet | from the west-northwest (290°) at 10 knots | 10+ mi | 9,000 ft | 2,871 ft | 12:53 am MDT (06:53 UTC) |
The highest airport on this list sits at 6,451 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BOI when you get there the forecast at the estimated arrival, 6:14 am MDT (12:14 UTC)
Wind from the west-northwest at 5 knots, visibility more than 6 miles, scattered clouds at 4,000 feet, a broken layer at 8,000 feet VFR
The whole forecast for BOI
- From Mon 12:00 am MDT (06:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 8,000 feet
- From Mon 2:00 am MDT (08:00 UTC): wind from the west-northwest at 5 knots, visibility more than 6 miles, scattered clouds at 4,000 feet, a broken layer at 8,000 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind from the northwest at 10 knots, visibility more than 6 miles, a broken layer at 10,000 feet
The forecast for RAP, the departure
- From Mon 1:00 am MDT (07:00 UTC): wind from the east-southeast at 8 knots, visibility 2 miles, mist, overcast at 300 feet
- At times between Mon 3:00 am MDT (09:00 UTC) and 7:00 am MDT (13:00 UTC): visibility ½ mile, fog, overcast at 200 feet
- From Mon 9:00 am MDT (15:00 UTC): wind from the north-northwest at 10 knots, visibility 2 miles, mist, a broken layer at 500 feet, overcast at 1,200 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind from the north-northwest at 20 knots, gusting to 30, visibility more than 6 miles, a broken layer at 2,500 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 RAP 6:12 pm MDT (00:12 UTC), at BOI 7:05 pm MDT (01:05 UTC) (civil twilight ends 7:33 pm MDT (01:33 UTC)). At 120 knots the arrival at BOI is before sunrise there (7:55 am MDT (13:55 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: Rapid City Regional, Boise Air Trml/Gowen Field.