Grand Junction Regional to George Bush Intcntl/Houston Airport GJT → IAH
850 nautical miles (979 statute miles) southeast on a straight line, true course 126°, about 117° magnetic at the departure end (variation 9E). At 120 knots that is 5 h 52 min at the quickest height in today's winds (34,000 ft, a 25-knot tailwind), arriving about 6:59 am CDT (11:59 UTC), after sunset at the destination. Right now GJT is VFR, wind variable at 4 knots; IAH is VFR, wind from the east-southeast (110°) 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: 30 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 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 first 178 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the first 129 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 297 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 0 nm of the route.
- AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the route from 138 to 257 nm out.
- 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). Near the route, 307 nm along 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 GJT.
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 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 (GJT, ALS, TCC, AMA, LBB, ABI, DAL, CLL, HOU). 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 31 kt | +12 kt | 17 °C | 108 kt | 7 h 52 min | 8:59 am CDT (13:59 UTC) |
| 7,500 ft | 210° at 28 kt | +6 kt | 14 °C | 114 kt | 7 h 27 min | 8:34 am CDT (13:34 UTC) |
| 9,500 ft | 220° at 24 kt | 0 | 12 °C | 120 kt | 7 h 05 min | 8:12 am CDT (13:12 UTC) |
| 11,500 ft | 230° at 26 kt | −6 kt | 7 °C | 126 kt | 6 h 45 min | 7:52 am CDT (12:52 UTC) |
| 13,500 ft | 230° at 27 kt | −6 kt | 3 °C | 126 kt | 6 h 45 min | 7:52 am CDT (12:52 UTC) |
| 15,500 ft | 230° at 28 kt | −5 kt | -1 °C | 125 kt | 6 h 48 min | 7:55 am CDT (12:55 UTC) |
| 17,500 ft | 230° at 29 kt | −4 kt | -5 °C | 124 kt | 6 h 51 min | 7:58 am CDT (12:58 UTC) |
| 18,000 ft FL180 | 230° at 29 kt | −3 kt | -6 °C | 123 kt | 6 h 55 min | 8:02 am CDT (13:02 UTC) |
| 24,000 ft FL240 | 230° at 38 kt | −10 kt | -17 °C | 130 kt | 6 h 32 min | 7:39 am CDT (12:39 UTC) |
| 30,000 ft FL300 | 240° at 50 kt | −22 kt | -28 °C | 142 kt | 5 h 59 min | 7:06 am CDT (12:06 UTC) |
| 34,000 ft FL340 | 250° at 47 kt | −25 kt | -37 °C | 145 kt | 5 h 52 min | 6:59 am CDT (11:59 UTC) |
| 39,000 ft FL390 | 260° at 38 kt | −25 kt | -48 °C | 145 kt | 5 h 52 min | 6:59 am CDT (11:59 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| GJT | used from 0 nm out; 25 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 99 nm out; 38 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 247 nm out; 73 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 346 nm out; 35 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 445 nm out; 58 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 494 nm out; 81 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° | |
| DAL | used from 643 nm out; 73 nm from the line | 190/29 | 220/23 17° | 220/17 13° | 250/18 8° | 230/18 -5° | 240/18 -15° | 270/34 -29° | 280/33 -39° | 300/36 -51° |
| CLL | used from 692 nm out; 71 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° |
| HOU | used from 841 nm out; 25 nm from the line | 160/22 | 150/27 19° | 180/16 14° | 250/7 9° | 270/10 -5° | 270/16 -13° | 310/23 -29° | 310/26 -40° | 330/20 -52° |
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 |
|---|---|---|---|---|---|---|---|
| GJT Grand Junction, CO | departure | VFR Sky: a few clouds at 6,000 feet, overcast at 10,000 feet | variable at 4 knots | 10+ mi | 10,000 ft | 4,861 ft | 11:53 pm MDT (05:53 UTC) |
| AJZ Delta, CO | 30 nm out, 3 nm southwest of the line | reported, no category | calm | none | 5,193 ft | 05:55 UTC | |
| ALS Alamosa, CO | 158 nm out, 6 nm south of the line | VFR Sky: scattered clouds at 4,800 feet, a broken layer at 7,000 feet, overcast at 9,000 feet Weather: light rain | from the south-southwest (210°) at 11 knots | 10+ mi | 7,000 ft | 7,539 ft | 05:52 UTC |
| RTN Raton, NM | 237 nm out, 2 nm northeast of the line | VFR | from the west-southwest (250°) at 5 knots | 10+ mi | none | 6,352 ft | 05:53 UTC |
| AMA Amarillo, TX | 405 nm out, 19 nm northeast of the line, tower | VFR | from the south (190°) at 22 knots, gusting to 29 | 10+ mi | none | 3,606 ft | 05:53 UTC |
| SEP Stephenville, TX | 653 nm out, 1 nm southwest of the line | VFR | from the south (170°) at 4 knots | 10+ mi | none | 1,321 ft | 05:55 UTC |
| ACT Waco, TX | 712 nm out, 5 nm northeast of the line, tower | VFR | from the south (170°) at 15 knots | 10+ mi | none | 516 ft | 05:51 UTC |
| CLL College Station, TX | 791 nm out, 11 nm southwest of the line, tower | VFR | from the south-southeast (150°) at 7 knots | 10+ mi | none | 320 ft | 05:53 UTC |
| IAH Houston, TX | destination | VFR Sky: a broken layer at 20,000 feet | from the east-southeast (110°) at 4 knots | 10+ mi | 20,000 ft | 95 ft | 12:53 am CDT (05:53 UTC) |
The highest airport on this list sits at 7,539 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At IAH when you get there the forecast at the estimated arrival, 6:59 am CDT (11:59 UTC)
Wind from the east-southeast at 4 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, scattered clouds at 25,000 feet VFR
The whole forecast for IAH
- From Mon 1:00 am CDT (06:00 UTC): wind from the south-southeast at 7 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
- From Mon 4:00 am CDT (09:00 UTC): wind from the east-southeast at 4 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, scattered clouds at 25,000 feet
- From Mon 12:00 pm CDT (17:00 UTC): wind from the southeast at 11 knots, visibility more than 6 miles, scattered clouds at 3,500 feet, a broken layer at 25,000 feet
- 30% chance between Mon 1:00 pm CDT (18:00 UTC) and 5:00 pm CDT (22:00 UTC): light rain showers
The forecast for GJT, the departure
- From Mon 12:00 am MDT (06:00 UTC): wind from the north 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 2:00 am MDT (08:00 UTC): wind from the south at 18 knots, gusting to 27, visibility more than 6 miles, scattered clouds at 3,500 feet, a broken layer at 7,000 feet
- 30% chance between Mon 2:00 am MDT (08:00 UTC) and 8:00 am MDT (14:00 UTC): visibility 4 miles, light rain showers, a broken layer at 3,500 feet
- From Mon 8:00 am MDT (14:00 UTC): wind from the south-southeast at 19 knots, gusting to 31, visibility more than 6 miles, scattered clouds at 4,500 feet, a broken layer at 7,000 feet
- 30% chance between Mon 8:00 am MDT (14:00 UTC) and 12:00 pm MDT (18:00 UTC): visibility 4 miles, light rain showers, a broken layer at 3,500 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind from the south-southwest at 16 knots, gusting to 24, visibility more than 6 miles, scattered clouds at 4,000 feet, a broken layer at 6,000 feet
- 30% chance between Mon 12:00 pm MDT (18:00 UTC) and 6:00 pm MDT (00:00 UTC): visibility 4 miles, light rain showers, a broken layer at 4,000 feet, a broken layer at 6,000 feet
- From Mon 6:00 pm MDT (00:00 UTC): wind from the west at 12 knots, gusting to 21, visibility more than 6 miles, a few clouds at 6,000 feet, scattered clouds at 8,000 feet
- 30% chance between Mon 6:00 pm MDT (00:00 UTC) and 12:00 am MDT (06:00 UTC): visibility 4 miles, light thunderstorms with rain, a broken layer at 6,000 feet (thunderheads)
Temporary flight restrictions on the line or within 25 nm of it
- 6/0543 MCGREGOR, TX 11 nm from the route, 712 nm along the route · security · ZFW
Daylight
Sunset at GJT 6:38 pm MDT (00:38 UTC), at IAH 6:54 pm CDT (23:54 UTC) (civil twilight ends 7:18 pm CDT (00:18 UTC)). At 120 knots the arrival at IAH is before sunrise there (7:21 am CDT (12:21 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: Grand Junction Regional, George Bush Intcntl/Houston Airport.