Joslin Fld/Magic Valley Regional to Robert Gray Army Airfield TWF → GRK
1,051 nautical miles (1,209 statute miles) southeast on a straight line, true course 125°, about 112° magnetic at the departure end (variation 13E). At 120 knots that is 7 h 37 min at the quickest height in today's winds (34,000 ft, a 18-knot tailwind), arriving about 5:20 am CDT (10:20 UTC), after sunset at the destination. Right now TWF is VFR, wind from the southwest (230°) at 7 knots; GRK is VFR, wind from the southeast (140°) at 6 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: 2 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 6W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 9:55 pm MDT (03:55 UTC). Over the route from 406 to 625 nm out.
as issued
WSUS33 KKCI 120155 MKCW WST 120155 CONVECTIVE SIGMET 6W VALID UNTIL 0355Z CO NM FROM 50SSW DEN-30NNE TBE-50SSW CME-50E SJN-20NE DVC-50SSW DEN AREA TS MOV FROM 23040KT. TOPS TO FL340.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the first 327 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 565 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 30 to 317 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 129 to 644 nm out.
- 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 route from 159 to 248 nm out.
- 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 248 to 496 nm out.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 258 nm along the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 406 to 555 nm out.
- AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the route from 595 to 605 nm out.
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
- E75L at 22,000 ft, 30 nm southwest, 7:04 pm MDT (01:04 UTC): moderate turbulence. 218 nm along the route, 30 nm southwest of the line.
as filed, and in English
PUC UA /OV PUC320020/TM 0104/FL220/TP E75L/TB MOD /ZLC
- Report
- a routine report filed through PUC
- Where
- 20 nm northwest (320°) of PUC
- Time
- 01:04 UTC
- Height
- at 22,000 ft
- Aircraft
- E75L
- Turbulence
- moderate zlc
- S22T at 14,000 ft, 25 nm southwest, 7:23 pm MDT (01:23 UTC): moderate rime icing, -16 °C. 228 nm along the route, 25 nm southwest of the line.
as filed, and in English
PUC UA /OV PUC360015/TM 0123/FL140/TP S22T/TA M16/IC MOD RIME /ZLC
- Report
- a routine report filed through PUC
- Where
- 15 nm north (360°) of PUC
- Time
- 01:23 UTC
- Height
- at 14,000 ft
- Aircraft
- S22T
- Temperature
- −16 °C
- Icing
- moderate rime zlc
- SW4 at 15,000 ft, 49 nm southwest, 7:39 pm MDT (01:39 UTC): moderate turbulence, light rime icing, freezing, rain, 0 °C, remarks: instrument conditions ZDVWC-36. 406 nm along the route, 49 nm southwest of the line.
as filed, and in English
CEZ UA /OV CEZ030030/TM 0139/FL150/TP SW4/SK BASE150/WX FZ RA/TA 00/TB CONS MOD/IC LGT RIME/RM IMC ZDVWC-36
- Report
- a routine report filed through CEZ
- Where
- 30 nm northeast (030°) of CEZ
- Time
- 01:39 UTC
- Height
- at 15,000 ft
- Aircraft
- SW4
- Sky
- BASE150
- Weather
- freezing, rain
- Temperature
- 0 °C
- Turbulence
- continuous moderate
- Icing
- light rime
- Remarks
- instrument conditions ZDVWC-36
- GLF4 at 43,000 ft, 49 nm southwest, 6:09 pm MDT (00:09 UTC): moderate chop turbulence, remarks: ZDVWC-38. 426 nm along the route, 49 nm southwest of the line.
as filed, and in English
FMN UA /OV RSK360050/TM 0009/FL430/TP GLF4/TB MOD CHOP/RM ZDVWC-38
- Report
- a routine report filed through FMN
- Where
- 50 nm north (360°) of RSK
- Time
- 00:09 UTC
- Height
- at 43,000 ft
- Aircraft
- GLF4
- Turbulence
- moderate chop
- Remarks
- ZDVWC-38
- UAL2238 at 38,000 ft, 8 nm northeast, 5:44 pm MDT (23:44 UTC): moderate turbulence, wind 244° at 64 knots. 436 nm along the route, 8 nm northeast of the line.
as filed, and in English
ARP UAL2238 3807N 10649W 2344 F380 244/064KT TB CONT MOD TURB IC
- Report
- a routine report filed through ARP
- 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
- B737 at 16,000 ft, 30 nm southwest, 6:45 pm MDT (00:45 UTC): no turbulence, light rime icing from 13,000 ft to 17,000 ft, 8 °C, remarks: during the climb. 139 nm along the route, 30 nm southwest of the line.
as filed, and in English
SLC UA /OV TCH230020/TM 0045/FL160/TP B737/TA 8/TB NEG/IC LT RIME 130-170/RM DURC
- Report
- a routine report filed through SLC
- Where
- 20 nm southwest (230°) of TCH
- Time
- 00:45 UTC
- Height
- at 16,000 ft
- Aircraft
- B737
- Temperature
- 8 °C
- Turbulence
- none
- Icing
- lt rime from 13,000 ft to 17,000 ft
- Remarks
- during the climb
- B38M at 16,000 ft, 26 nm southwest, 6:06 pm MDT (00:06 UTC): no turbulence, no icing, 13 °C, remarks: during the climb. 139 nm along the route, 26 nm southwest of the line.
as filed, and in English
SLC UA /OV TCH230015/TM 0006/FL160/TP B38M/TA 13/TB NEG/IC NEG/RM DURC
- Report
- a routine report filed through SLC
- Where
- 15 nm southwest (230°) of TCH
- Time
- 00:06 UTC
- Height
- at 16,000 ft
- Aircraft
- B38M
- Temperature
- 13 °C
- Turbulence
- none
- Icing
- none
- Remarks
- during the climb
- A321 at 10,000 ft, 29 nm southwest, 6:00 pm MDT (00:00 UTC): light chop turbulence, no icing, remarks: during the descent. 159 nm along the route, 29 nm southwest of the line.
as filed, and in English
SLC UA /OV TCH165020/TM 0000/FL100/TP A321/TB LGT CHOP/IC NEG/RM DURD
- Report
- a routine report filed through SLC
- Where
- 20 nm south (165°) of TCH
- Time
- 00:00 UTC
- Height
- at 10,000 ft
- Aircraft
- A321
- Turbulence
- light chop
- Icing
- none
- Remarks
- during the descent
- GLF6 at 45,000 ft, 38 nm southwest, 8:24 pm MDT (02:24 UTC): light chop turbulence, remarks: ZDVWC-03. 238 nm along the route, 38 nm southwest of the line.
as filed, and in English
PUC UA /OV PUC1130028/TM 0224/FL450/TP GLF6/TB CONS LGT CHOP/RM ZDVWC-03
- Report
- a routine report filed through PUC
- Where
- 28 nm southeast (130°) of PUC1
- Time
- 02:24 UTC
- Height
- at 45,000 ft
- Aircraft
- GLF6
- Turbulence
- continuous light chop
- Remarks
- ZDVWC-03
- LJ60 at 15,000 ft, 23 nm northeast, 6:28 pm MDT (00:28 UTC): light to moderate icing from 16,500 ft to 19,000 ft, -13 °C, remarks: during the descent zdvwc. 387 nm along the route, 23 nm northeast of the line.
as filed, and in English
MTJ UA /OV MTJ030030/TM 0028/FL150/TP LJ60/TA M13/IC LGT-MOD 190-165/RM DURD ZDVWC
- Report
- a routine report filed through MTJ
- Where
- 30 nm northeast (030°) of MTJ
- Time
- 00:28 UTC
- Height
- at 15,000 ft
- Aircraft
- LJ60
- Temperature
- −13 °C
- Icing
- light to moderate from 19,000 ft to 16,500 ft
- Remarks
- during the descent zdvwc
- SW4 at 20,000 ft, 24 nm northeast, 7:00 pm MDT (01:00 UTC): light rime icing, 0 °C, remarks: ZDVWC-12. 416 nm along the route, 24 nm northeast of the line.
as filed, and in English
GUC UA /OV GUC/TM 0100/FL200/TP SW4/TA 00/IC LGT RIME/RM ZDVWC-12
- Report
- a routine report filed through GUC
- Where
- over GUC
- Time
- 01:00 UTC
- Height
- at 20,000 ft
- Aircraft
- SW4
- Temperature
- 0 °C
- Icing
- light rime
- Remarks
- ZDVWC-12
- BE9L at 20,000 ft, 23 nm northeast, 6:34 pm MDT (00:34 UTC): light rime icing, -9 °C, remarks: ZDVWC-41. 476 nm along the route, 23 nm northeast of the line.
as filed, and in English
ALS UA /OV ALS330035/TM 0034/FL200/TP BE9L/TA M09/IC LGT RIME/RM ZDVWC-41
- Report
- a routine report filed through ALS
- Where
- 35 nm northwest (330°) of ALS
- Time
- 00:34 UTC
- Height
- at 20,000 ft
- Aircraft
- BE9L
- Temperature
- −9 °C
- Icing
- light rime
- Remarks
- ZDVWC-41
- B38M at 36,000 ft, 35 nm northeast, 8:22 pm MDT (02:22 UTC): light turbulence, remarks: mtw +/-200FT ZDVWC-30. 486 nm along the route, 35 nm northeast of the line.
as filed, and in English
ALS UA /OV ALS360035/TM 0222/FL360/TP B38M/TB LGT/RM MTW +/-200FT ZDVWC-30
- Report
- a routine report filed through ALS
- Where
- 35 nm north (360°) of ALS
- Time
- 02:22 UTC
- Height
- at 36,000 ft
- Aircraft
- B38M
- Turbulence
- light
- Remarks
- mtw +/-200FT ZDVWC-30
3 more routine reports are on the map.
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 9 forecast points nearest it (PIH, SLC, GJT, ALS, TCC, AMA, LBB, ABI, CLL). 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 | 200° at 24 kt | +8 kt | 17 °C | 112 kt | 9 h 23 min | 7:06 am CDT (12:06 UTC) |
| 7,500 ft | 210° at 25 kt | +4 kt | 13 °C | 116 kt | 9 h 04 min | 6:47 am CDT (11:47 UTC) |
| 9,500 ft | 220° at 23 kt | 0 | 9 °C | 120 kt | 8 h 46 min | 6:29 am CDT (11:29 UTC) |
| 11,500 ft | 230° at 26 kt | −5 kt | 5 °C | 125 kt | 8 h 24 min | 6:07 am CDT (11:07 UTC) |
| 13,500 ft | 230° at 29 kt | −4 kt | 1 °C | 124 kt | 8 h 29 min | 6:12 am CDT (11:12 UTC) |
| 15,500 ft | 220° at 32 kt | −2 kt | -4 °C | 122 kt | 8 h 37 min | 6:20 am CDT (11:20 UTC) |
| 17,500 ft | 220° at 35 kt | −1 kt | -7 °C | 121 kt | 8 h 41 min | 6:24 am CDT (11:24 UTC) |
| 18,000 ft FL180 | 220° at 36 kt | 0 | -8 °C | 120 kt | 8 h 46 min | 6:29 am CDT (11:29 UTC) |
| 24,000 ft FL240 | 220° at 47 kt | −1 kt | -20 °C | 121 kt | 8 h 41 min | 6:24 am CDT (11:24 UTC) |
| 30,000 ft FL300 | 230° at 59 kt | −13 kt | -28 °C | 133 kt | 7 h 54 min | 5:37 am CDT (10:37 UTC) |
| 34,000 ft FL340 | 240° at 57 kt | −18 kt | -35 °C | 138 kt | 7 h 37 min | 5:20 am CDT (10:20 UTC) |
| 39,000 ft FL390 | 240° at 48 kt | −17 kt | -46 °C | 137 kt | 7 h 40 min | 5:23 am CDT (10:23 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; 75 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 99 nm out; 31 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° | |
| GJT | used from 248 nm out; 65 nm from the line | 210/43 7° | 230/45 1° | 220/49 -12° | 220/62 -22° | 220/59 -28° | 230/60 -33° | 220/55 -45° | ||
| ALS | used from 397 nm out; 78 nm from the line | 230/37 4° | 220/54 -9° | 230/62 -22° | 240/77 -26° | 240/74 -33° | 230/59 -45° | |||
| TCC | used from 595 nm out; 55 nm from the line | 210/42 | 230/33 14° | 230/32 6° | 220/35 -6° | 230/49 -19° | 240/72 -27° | 250/62 -36° | 250/52 -48° | |
| AMA | used from 694 nm out; 46 nm from the line | 210/38 | 230/29 14° | 240/29 7° | 220/27 -5° | 240/37 -18° | 240/66 -28° | 250/59 -37° | 260/47 -49° | |
| LBB | used from 744 nm out; 41 nm from the line | 200/36 18° | 220/19 15° | 240/20 8° | 230/24 -4° | 240/37 -16° | 250/57 -28° | 250/51 -38° | 270/47 -50° | |
| ABI | used from 843 nm out; 60 nm from the line | 200/31 17° | 210/21 15° | 240/15 9° | 250/14 -4° | 250/24 -14° | 250/36 -28° | 270/35 -38° | 290/41 -50° | |
| CLL | used from 1041 nm out; 85 nm from the line | 170/22 | 170/26 18° | 200/15 14° | 240/13 8° | 240/15 -5° | 260/17 -13° | 290/27 -29° | 290/22 -40° | 320/30 -51° |
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 4,000 feet | from the southwest (230°) at 7 knots | 10+ mi | 4,000 ft | 4,153 ft | 7:53 pm MDT (01:53 UTC) |
| BYI Burley, ID | 20 nm out, 22 nm northeast of the line | VFR Sky: a broken layer at 5,000 feet | from the south-southwest (210°) at 4 knots | 10+ mi | 5,000 ft | 4,153 ft | 01:53 UTC |
| OGD Ogden, UT | 139 nm out, 5 nm north of the line, tower | VFR Sky: overcast at 8,000 feet Weather: light rain | from the south (180°) at 6 knots | 10+ mi | 8,000 ft | 4,472 ft | 01:53 UTC |
| GJT Grand Junction, CO | 337 nm out, 3 nm northeast of the line, tower | VFR | from the southwest (220°) at 7 knots, gusting to 20 | 10+ mi | none | 4,861 ft | 01:53 UTC |
| MVI Monte Vista, CO | 486 nm out, 6 nm east of the line | no report just now | 7,611 ft | ||||
| RTN Raton, NM | 575 nm out, 18 nm northeast of the line | VFR Sky: a few clouds at 6,500 feet, a broken layer at 8,000 feet, a broken layer at 10,000 feet Weather: light rain | from the west-southwest (250°) at 11 knots | 10+ mi | 8,000 ft | 6,352 ft | 02:22 UTC |
| HRX Hereford, TX | 734 nm out, 7 nm north of the line | reported, no category | from the south (190°) at 14 knots, gusting to 18 | 10+ mi | none | 3,787 ft | 02:10 UTC |
| PVW Plainview, TX | 783 nm out, 5 nm west of the line | VFR | from the south (170°) at 11 knots | 10+ mi | none | 3,374 ft | 02:35 UTC |
| ABI Abilene, TX | 922 nm out, 11 nm south of the line, tower | VFR | from the south-southeast (160°) at 13 knots | 10+ mi | none | 1,790 ft | 01:52 UTC |
| MKN Comanche, TX | 991 nm out, 9 nm north of the line | reported, no category | calm | 10+ mi | none | 1,386 ft | 02:35 UTC |
| GRK Fort Hood (Killeen), TX | destination | VFR | from the southeast (140°) at 6 knots | 10+ mi | none | 1,015 ft | 8:55 pm CDT (01:55 UTC) |
The highest airport on this list sits at 7,611 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At GRK when you get there the forecast at the estimated arrival, 5:20 am CDT (10:20 UTC)
Wind from the south-southeast at 9 knots, scattered clouds at 6,000 feet
The whole forecast for GRK
- From Sun 7:00 pm CDT (00:00 UTC): wind from the south-southeast at 9 knots, scattered clouds at 6,000 feet
- Changing between Mon 3:00 am CDT (08:00 UTC) and 4:00 am CDT (09:00 UTC) to: wind from the southeast at 6 knots, a broken layer at 1,500 feet
- Changing between Mon 4:00 pm CDT (21:00 UTC) and 5:00 pm CDT (22:00 UTC) to: wind from the south-southeast at 12 knots, a broken layer at 5,000 feet
- Changing between Mon 10:00 pm CDT (03:00 UTC) and 11:00 pm CDT (04:00 UTC) to: wind from the south-southeast at 9 knots, a broken layer at 1,500 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 GRK 7:03 pm CDT (00:03 UTC) (civil twilight ends 7:27 pm CDT (00:27 UTC)). At 120 knots the arrival at GRK is before sunrise there (7:31 am CDT (12:31 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, Robert Gray Army Airfield.