Harry Reid International to Joslin Fld/Magic Valley Regional LAS → TWF
386 nautical miles (444 statute miles) north on a straight line, true course 004°, about 353° magnetic at the departure end (variation 11E). At 120 knots that is 2 h 13 min at the quickest height in today's winds (34,000 ft, a 54-knot tailwind), arriving about 3:41 am MDT (09:41 UTC), after sunset at the destination. Right now LAS is VFR, wind from the south (170°) at 8 knots; TWF is VFR, wind from the south-southwest (200°) at 9 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: 86 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 W16W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the southwest at 20 knots, until 1:55 am PDT (08:55 UTC). Over the route from 227 to 306 nm out.
as issued
WSUS33 KKCI 120655 MKCW WST 120655 CONVECTIVE SIGMET 16W VALID UNTIL 0855Z UT NV FROM 50NW BVL-20NE BVL-40SE OAL-20N OAL-50NW BVL AREA TS MOV FROM 24020KT. TOPS TO FL270.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the whole route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 237 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 326 nm of the route.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 20 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 LAS.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B737 at 14,500 ft, 12 nm south, 10:30 pm PDT (05:30 UTC): light turbulence. At the departure end, 12 nm south of the line.
as filed, and in English
LAS UA /OV LAS155012/TM 0530/FL145/TP B737/TB LGT
- Report
- a routine report filed through LAS
- Where
- 12 nm southeast (155°) of LAS
- Time
- 05:30 UTC
- Height
- at 14,500 ft
- Aircraft
- B737
- Turbulence
- light
- B38M at 14,000 ft, 37 nm east, 10:47 pm PDT (05:47 UTC): light rime icing, 6 °C. At the departure end, 37 nm east of the line.
as filed, and in English
LAS UA /OV LAS059040/TM 0547/FL140/TP B38M/TA 06/IC LGT RIME
- Report
- a routine report filed through LAS
- Where
- 40 nm northeast (059°) of LAS
- Time
- 05:47 UTC
- Height
- at 14,000 ft
- Aircraft
- B38M
- Temperature
- 6 °C
- Icing
- light rime
- B737 at 19,000 ft, 11 nm southeast, 10:45 pm PDT (05:45 UTC): light turbulence. At the departure end, 11 nm southeast of the line.
as filed, and in English
LAS UA /OV LAS050012/TM 0545/FL190/TP B737/TB LGT
- Report
- a routine report filed through LAS
- Where
- 12 nm northeast (050°) of LAS
- Time
- 05:45 UTC
- Height
- at 19,000 ft
- Aircraft
- B737
- Turbulence
- light
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 (LAS, ELY, BAM, PIH). 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 | 200° at 25 kt | −24 kt | 3 °C | 144 kt | 2 h 41 min | 4:09 am MDT (10:09 UTC) |
| 10,500 ft | 210° at 24 kt | −22 kt | 0 °C | 142 kt | 2 h 43 min | 4:11 am MDT (10:11 UTC) |
| 12,500 ft | 210° at 24 kt | −21 kt | -4 °C | 141 kt | 2 h 44 min | 4:12 am MDT (10:12 UTC) |
| 14,500 ft | 210° at 32 kt | −28 kt | -8 °C | 148 kt | 2 h 36 min | 4:04 am MDT (10:04 UTC) |
| 16,500 ft | 210° at 39 kt | −35 kt | -12 °C | 155 kt | 2 h 29 min | 3:57 am MDT (09:57 UTC) |
| 18,000 ft FL180 | 210° at 45 kt | −41 kt | -15 °C | 161 kt | 2 h 24 min | 3:52 am MDT (09:52 UTC) |
| 24,000 ft FL240 | 210° at 57 kt | −51 kt | -24 °C | 171 kt | 2 h 15 min | 3:43 am MDT (09:43 UTC) |
| 30,000 ft FL300 | 220° at 62 kt | −53 kt | -29 °C | 173 kt | 2 h 14 min | 3:42 am MDT (09:42 UTC) |
| 34,000 ft FL340 | 210° at 63 kt | −54 kt | -34 °C | 174 kt | 2 h 13 min | 3:41 am MDT (09:41 UTC) |
| 39,000 ft FL390 | 220° at 58 kt | −48 kt | -43 °C | 168 kt | 2 h 18 min | 3:46 am MDT (09:46 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| LAS | used from 0 nm out; 25 nm from the line | 210/21 10° | 200/18 5° | 200/23 -2° | 210/49 -14° | 210/63 -21° | 220/58 -30° | 220/61 -35° | 210/56 -44° | |
| ELY | used from 99 nm out; 70 nm from the line | 200/39 3° | 210/27 -2° | 210/45 -15° | 220/56 -24° | 210/60 -28° | 210/63 -34° | 220/61 -43° | ||
| BAM | used from 297 nm out; 114 nm from the line | 310/7 0° | 270/19 -7° | 200/38 -17° | 190/49 -28° | 220/69 -29° | 220/63 -33° | 230/48 -41° | ||
| PIH | used from 346 nm out; 97 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° |
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 |
|---|---|---|---|---|---|---|---|
| LAS Las Vegas, NV | departure | VFR Sky: scattered clouds at 8,000 feet, a broken layer at 10,000 feet | from the south (170°) at 8 knots | 10+ mi | 10,000 ft | 2,183 ft | 11:56 pm PDT (06:56 UTC) |
| ELY Ely, NV | 198 nm out, 4 nm south of the line | VFR Sky: a broken layer at 4,800 feet, overcast at 6,000 feet | from the south (190°) at 10 knots | 10+ mi | 4,800 ft | 6,259 ft | 06:53 UTC |
| LWL Wells, NV | 306 nm out, 13 nm west of the line | no report just now | 5,769 ft | ||||
| TWF Twin Falls, ID | destination | VFR Sky: overcast at 3,600 feet Weather: light rain | from the south-southwest (200°) at 9 knots | 7 mi | 3,600 ft | 4,153 ft | 12:53 am MDT (06:53 UTC) |
The highest airport on this list sits at 6,259 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At TWF when you get there the forecast at the estimated arrival, 3:41 am MDT (09:41 UTC)
Wind from the southwest at 7 knots, visibility 5 miles, light rain, mist, scattered clouds at 1,500 feet, overcast at 2,500 feet marginal VFR
The whole forecast for TWF
- From Mon 12:00 am MDT (06:00 UTC): wind from the southwest at 8 knots, visibility more than 6 miles, light rain, a broken layer at 4,000 feet
- From Mon 1:00 am MDT (07:00 UTC): wind from the southwest at 7 knots, visibility 5 miles, light rain, mist, scattered clouds at 1,500 feet, overcast at 2,500 feet
- From Mon 10:00 am MDT (16:00 UTC): wind from the west at 7 knots, visibility 6 miles, light rain showers, mist, scattered clouds at 1,500 feet, a broken layer at 3,500 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind from the west-northwest at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 4,000 feet, overcast at 8,000 feet
- From Mon 8:00 pm MDT (02:00 UTC): wind from the west-southwest at 8 knots, visibility more than 6 miles, showers nearby, overcast at 4,000 feet
The forecast for LAS, the departure
- From Sun 11:00 pm PDT (06:00 UTC): wind from the south at 12 knots, gusting to 17, visibility more than 6 miles, a few clouds at 8,000 feet, a broken layer at 10,000 feet
- From Mon 1:00 am PDT (08:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, a few clouds at 8,000 feet, a broken layer at 10,000 feet
- From Mon 8:00 am PDT (15:00 UTC): wind from the south at 8 knots, visibility more than 6 miles, showers nearby, scattered clouds at 7,000 feet, a broken layer at 10,000 feet
- From Mon 12:00 pm PDT (19:00 UTC): wind from the south-southwest at 15 knots, gusting to 25, visibility more than 6 miles, showers nearby, scattered clouds at 7,000 feet, a broken layer at 12,000 feet
- From Mon 9:00 pm PDT (04:00 UTC): wind from the southwest at 8 knots, visibility more than 6 miles, a few clouds at 8,000 feet, scattered clouds at 10,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/8890 LAS VEGAS, NV, Tuesday, October 13, 2026 Local on the route, at the departure end · a VIP movement · starts tomorrow · ZLA
- 6/8808 Las Vegas, NV, Tuesday, October 13, 2026 Local on the route, at the departure end · security · starts tomorrow · ZLA
Daylight
Sunset at LAS 6:07 pm PDT (01:07 UTC), at TWF 6:59 pm MDT (00:59 UTC) (civil twilight ends 7:27 pm MDT (01:27 UTC)). At 120 knots the arrival at TWF is before sunrise there (7:47 am MDT (13:47 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: Harry Reid International, Joslin Fld/Magic Valley Regional.