The U.S. aircraft register, updated daily
Plan a flight · Sun 10:39 pm CDT (03:39 UTC)

Robert Gray Army Airfield to Joslin Fld/Magic Valley Regional GRK → TWF

1,051 nautical miles (1,209 statute miles) northwest on a straight line, true course 315°, about 311° magnetic at the departure end (variation 4E). At 120 knots that is 8 h 13 min at the quickest height in today's winds (4,500 ft, a 8-knot tailwind), arriving about 5:52 am MDT (11:52 UTC), after sunset at the destination. 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 return flight

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 3C: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 30 knots, until 11:55 pm CDT (04:55 UTC). Near the route, 426 nm along the route.
    as issued
    WSUS32 KKCI 120255
    MKCC WST 120255
    CONVECTIVE SIGMET 3C
    VALID UNTIL 0455Z
    TX NM
    FROM 50SE CIM-70WNW MRF-30W ELP-10W FTI-50SE CIM
    AREA TS MOV FROM 22030KT. TOPS TO FL300.
  • SIGMET W11W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 11:55 pm CDT (04:55 UTC). Over the route from 486 to 634 nm out.
    as issued
    WSUS33 KKCI 120255
    MKCW WST 120255
    CONVECTIVE SIGMET 11W
    VALID UNTIL 0455Z
    CO NM
    FROM 20WNW PUB-10ENE CIM-50WNW ABQ-30NNE DVC-20WNW PUB
    AREA TS MOV FROM 22040KT. TOPS TO FL340.
  • SIGMET W12W: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 20 knots, until 11:55 pm CDT (04:55 UTC). Near the route, at the destination end.
    as issued
    WSUS33 KKCI 120255
    MKCW WST 120255
    CONVECTIVE SIGMET 12W
    VALID UNTIL 0455Z
    NV
    FROM 40SSE TWF-10W ELY-30SE OAL-30W OAL-70WSW TWF-40SSE TWF
    AREA TS MOV FROM 24020KT. TOPS TO FL310.
  • AIRMET TANGO 3W: 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 406 to 456 nm out.
  • AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 406 to 892 nm out.
  • AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the route from 436 to 575 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 545 to 813 nm out.
  • AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 555 to 565 nm out.
  • AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 575 to 912 nm out.
  • AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the last 327 nm of the route.
  • AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 317 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 GRK.

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 8 forecast points nearest it (ABI, LBB, AMA, TCC, ALS, GJT, SLC, PIH). A plus sign is a headwind, a minus sign a tailwind.

HeightAverage windHead- or tailwindTemperatureGround speedTime en routeArrival
4,500 ft200° at 24 kt−8 kt17 °C128 kt8 h 13 min5:52 am MDT (11:52 UTC)
6,500 ft210° at 23 kt−7 kt17 °C127 kt8 h 17 min5:56 am MDT (11:56 UTC)
8,500 ft220° at 23 kt−2 kt13 °C122 kt8 h 37 min6:16 am MDT (12:16 UTC)
10,500 ft230° at 26 kt+3 kt6 °C117 kt8 h 59 min6:38 am MDT (12:38 UTC)
12,500 ft230° at 28 kt+4 kt3 °C116 kt9 h 04 min6:43 am MDT (12:43 UTC)
14,500 ft230° at 31 kt+3 kt-1 °C117 kt8 h 59 min6:38 am MDT (12:38 UTC)
16,500 ft220° at 34 kt+1 kt-6 °C119 kt8 h 50 min6:29 am MDT (12:29 UTC)
18,000 ft FL180220° at 36 kt0-8 °C120 kt8 h 46 min6:25 am MDT (12:25 UTC)
24,000 ft FL240220° at 46 kt0-20 °C120 kt8 h 46 min6:25 am MDT (12:25 UTC)
30,000 ft FL300230° at 59 kt+12 kt-28 °C108 kt9 h 44 min7:23 am MDT (13:23 UTC)
34,000 ft FL340240° at 57 kt+18 kt-35 °C102 kt10 h 18 min7:57 am MDT (13:57 UTC)
39,000 ft FL390240° at 49 kt+16 kt-46 °C104 kt10 h 06 min7:45 am MDT (13:45 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
PointFrom3,0006,0009,00012,00018,00024,00030,00034,00039,000
ABIused from 0 nm out; 100 nm from the line200/31 17°210/21 15°240/15 9°250/14 -4°250/24 -14°250/36 -28°270/35 -38°290/41 -50°
LBBused from 198 nm out; 43 nm from the line200/36 18°220/19 15°240/20 8°230/24 -4°240/37 -16°250/57 -28°250/51 -38°270/47 -50°
AMAused from 297 nm out; 43 nm from the line210/38230/29 14°240/29 7°220/27 -5°240/37 -18°240/66 -28°250/59 -37°260/47 -49°
TCCused from 347 nm out; 24 nm from the line210/42230/33 14°230/32 6°220/35 -6°230/49 -19°240/72 -27°250/62 -36°250/52 -48°
ALSused from 446 nm out; 81 nm from the line230/37 4°220/54 -9°230/62 -22°240/77 -26°240/74 -33°230/59 -45°
GJTused from 644 nm out; 44 nm from the line210/43 7°230/45 1°220/49 -12°220/62 -22°220/59 -28°230/60 -33°220/55 -45°
SLCused from 793 nm out; 84 nm from the line200/5230/8 2°220/20 -2°210/40 -12°190/53 -25°210/62 -30°220/69 -34°220/64 -43°
PIHused from 991 nm out; 72 nm from the lineL/V240/13 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

AirportWhereConditionsWindVisibilityCeilingElevationReported
GRK Fort Hood (Killeen), TX departure no report just now 1,015 ft
MKN Comanche, TX 59 nm out, 9 nm north of the line no report just now 1,386 ft
ABI Abilene, TX 129 nm out, 11 nm south of the line, tower no report just now 1,790 ft
PVW Plainview, TX 268 nm out, 5 nm west of the line no report just now 3,374 ft
HRX Hereford, TX 317 nm out, 7 nm north of the line no report just now 3,787 ft
RTN Raton, NM 476 nm out, 18 nm northeast of the line no report just now 6,352 ft
MVI Monte Vista, CO 565 nm out, 6 nm east of the line no report just now 7,611 ft
GJT Grand Junction, CO 714 nm out, 3 nm northeast of the line, tower no report just now 4,861 ft
OGD Ogden, UT 912 nm out, 5 nm north of the line, tower no report just now 4,472 ft
BYI Burley, ID 1031 nm out, 22 nm northeast of the line no report just now 4,153 ft
TWF Twin Falls, ID destination no report just now 4,153 ft

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 TWF when you get there the forecast at the estimated arrival, 5:52 am MDT (11:52 UTC)

TWF has no terminal forecast; use the nearest airport that does.

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 GRK 7:03 pm CDT (00:03 UTC), at TWF 7:00 pm MDT (01:00 UTC) (civil twilight ends 7:29 pm MDT (01:29 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

Radar now, the southern Plains
Radar now, the southern Plains · loop National Weather Service
Radar now, the southern Rockies
Radar now, the southern Rockies · loop National Weather Service
Radar now, the Pacific Northwest
Radar now, the Pacific Northwest · loop National Weather Service
Radar, the whole country
Radar, the whole country · loop National Weather Service
Surface analysis now
Surface analysis now Weather Prediction Center
Forecast chart, 12 hours ahead
Forecast chart, 12 hours ahead Weather Prediction Center
Forecast chart, 24 hours ahead
Forecast chart, 24 hours ahead Weather Prediction Center

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: Robert Gray Army Airfield, Joslin Fld/Magic Valley Regional.