Joslin Fld/Magic Valley Regional to St. George Regional TWF → SGU
330 nautical miles (380 statute miles) south on a straight line, true course 172°, about 159° magnetic at the departure end (variation 13E). At 120 knots that is 3 h 14 min at the quickest height in today's winds (11,500 ft, a 18-knot headwind), arriving about 12:19 am MDT (06:19 UTC), after sunset at the destination. Right now TWF is VFR, wind from the west-southwest (240°) at 6 knots; SGU is VFR, wind from the east-southeast (120°) at 4 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: 26 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 ZULU 2C: moderate icing up to 23,000 ft. Over the whole route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 301 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 146 nm of the route.
- AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 68 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 TWF.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- PC12 at 14,000 ft, 50 nm northwest, 8:13 pm MDT (02:13 UTC): light turbulence up to 21,000 ft, light rime icing from 10,000 ft to 14,000 ft, -10 °C. At the departure end, 50 nm northwest of the line.
as filed, and in English
BOI UA /OV BOI117049/TM 0213/FL140/TP PC12/TA M10/TB CONS LGT 210 BLO/IC LGT RIME 140-100 /ZLC
- Report
- a routine report filed through BOI
- Where
- 49 nm southeast (117°) of BOI
- Time
- 02:13 UTC
- Height
- at 14,000 ft
- Aircraft
- PC12
- Temperature
- −10 °C
- Turbulence
- continuous light at 21,000 ft below
- Icing
- light rime from 14,000 ft to 10,000 ft zlc
- GLF4 at 25,000 ft, 35 nm east, 6:30 pm MDT (00:30 UTC): overcast up to 24,000 ft, remarks: visual conditions FL250 zlawc. At the destination end, 35 nm east of the line.
as filed, and in English
PUC UA /OV BCE200040/TM 0030/FL250/TP GLF4/SK OVC-TOP240/RM VMC FL250 /ZLAWC AWC-WEB
- Report
- a routine report filed through PUC
- Where
- 40 nm south (200°) of BCE
- Time
- 00:30 UTC
- Height
- at 25,000 ft
- Aircraft
- GLF4
- Sky
- overcast, tops 24,000 ft
- Remarks
- visual conditions FL250 zlawc
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 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 4 forecast points nearest it (PIH, SLC, ELY, BCE). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 7,500 ft | 200° at 26 kt | +22 kt | 3 °C | 98 kt | 3 h 22 min | 12:27 am MDT (06:27 UTC) |
| 9,500 ft | 210° at 26 kt | +22 kt | 1 °C | 98 kt | 3 h 22 min | 12:27 am MDT (06:27 UTC) |
| 11,500 ft | 220° at 24 kt | +18 kt | -1 °C | 102 kt | 3 h 14 min | 12:19 am MDT (06:19 UTC) |
| 13,500 ft | 210° at 29 kt | +21 kt | -5 °C | 99 kt | 3 h 20 min | 12:25 am MDT (06:25 UTC) |
| 15,500 ft | 210° at 35 kt | +27 kt | -9 °C | 93 kt | 3 h 33 min | 12:38 am MDT (06:38 UTC) |
| 17,500 ft | 210° at 41 kt | +32 kt | -13 °C | 88 kt | 3 h 45 min | 12:50 am MDT (06:50 UTC) |
| 18,000 ft FL180 | 210° at 42 kt | +34 kt | -14 °C | 86 kt | 3 h 50 min | 12:55 am MDT (06:55 UTC) |
| 24,000 ft FL240 | 210° at 56 kt | +43 kt | -24 °C | 77 kt | 4 h 17 min | 1:22 am MDT (07:22 UTC) |
| 30,000 ft FL300 | 210° at 63 kt | +47 kt | -29 °C | 73 kt | 4 h 31 min | 1:36 am MDT (07:36 UTC) |
| 34,000 ft FL340 | 220° at 65 kt | +47 kt | -34 °C | 73 kt | 4 h 31 min | 1:36 am MDT (07:36 UTC) |
| 39,000 ft FL390 | 220° at 59 kt | +40 kt | -43 °C | 80 kt | 4 h 08 min | 1:13 am MDT (07:13 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| PIH | used from 0 nm out; 94 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° | |
| SLC | used from 49 nm out; 107 nm from the line | 200/5 | 230/8 2° | 220/20 -2° | 210/40 -12° | 190/53 -25° | 210/62 -30° | 220/69 -34° | 220/64 -43° | |
| ELY | used from 97 nm out; 79 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° | ||
| BCE | used from 243 nm out; 76 nm from the line | 220/27 -1° | 210/40 -13° | 220/54 -21° | 220/64 -30° | 220/64 -34° | 220/52 -44° |
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 |
|---|---|---|---|---|---|---|---|
| TWF Twin Falls, ID | departure | VFR Sky: overcast at 4,400 feet | from the west-southwest (240°) at 6 knots | 10+ mi | 4,400 ft | 4,153 ft | 8:53 pm MDT (02:53 UTC) |
| ENV Wendover, UT | 107 nm out, 6 nm east of the line | marginal VFR Sky: overcast at 2,800 feet | from the south-southeast (160°) at 6 knots | 10+ mi | 2,800 ft | 4,236 ft | 02:56 UTC |
| CDC Cedar City, UT | 291 nm out, 25 nm east of the line | VFR Sky: a few clouds at 3,600 feet, a broken layer at 5,000 feet, overcast at 11,000 feet | from the south-southwest (210°) at 17 knots, gusting to 23 | 10+ mi | 5,000 ft | 5,622 ft | 02:53 UTC |
| SGU St George, UT | destination | VFR Sky: scattered clouds at 4,600 feet, scattered clouds at 6,500 feet, overcast at 11,000 feet | from the east-southeast (120°) at 4 knots | 10+ mi | 11,000 ft | 2,883 ft | 8:56 pm MDT (02:56 UTC) |
The highest airport on this list sits at 5,622 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SGU when you get there the forecast at the estimated arrival, 12:19 am MDT (06:19 UTC)
Wind from the south-southeast at 8 knots, visibility more than 6 miles, low-level wind shear, scattered clouds at 4,000 feet, a broken layer at 8,000 feet VFR
30% chance between Sun 9:00 pm MDT (03:00 UTC) and 3:00 am MDT (09:00 UTC): wind variable at 10 knots, gusting to 25, light rain showers, a broken layer at 4,000 feet VFR
The whole forecast for SGU
- From Sun 6:00 pm MDT (00:00 UTC): wind light and variable, visibility more than 6 miles, light rain showers, scattered clouds at 3,000 feet, a broken layer at 6,000 feet
- From Sun 9:00 pm MDT (03:00 UTC): wind from the south-southeast at 8 knots, visibility more than 6 miles, low-level wind shear, scattered clouds at 4,000 feet, a broken layer at 8,000 feet
- 30% chance between Sun 9:00 pm MDT (03:00 UTC) and 3:00 am MDT (09:00 UTC): wind variable at 10 knots, gusting to 25, light rain showers, a broken layer at 4,000 feet
- From Mon 8:00 am MDT (14:00 UTC): wind from the south-southeast at 12 knots, gusting to 20, visibility more than 6 miles, light rain showers, scattered clouds at 3,000 feet, a broken layer at 6,000 feet
The forecast for TWF, the departure
- From Sun 6:00 pm MDT (00:00 UTC): wind from the west-southwest at 6 knots, visibility more than 6 miles, showers nearby, overcast at 4,000 feet
- From Sun 8:00 pm MDT (02:00 UTC): wind from the southwest at 9 knots, visibility more than 6 miles, a broken layer at 4,000 feet
- From Mon 2:00 am MDT (08:00 UTC): wind from the southwest at 7 knots, visibility 5 miles, light rain, mist, scattered clouds at 1,000 feet, overcast at 3,000 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind from the west-northwest at 8 knots, visibility 6 miles, light rain showers, mist, scattered clouds at 1,500 feet, a broken layer at 3,500 feet
- From Mon 2:00 pm MDT (20:00 UTC): wind from the northwest at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 5,000 feet, overcast at 10,000 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 TWF 7:00 pm MDT (01:00 UTC), at SGU 7:01 pm MDT (01:01 UTC) (civil twilight ends 7:27 pm MDT (01:27 UTC)). At 120 knots the arrival at SGU is before sunrise there (7:38 am MDT (13:38 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: Joslin Fld/Magic Valley Regional, St. George Regional.