Plan a flight · Mon 2:40 am MDT (08:40 UTC)

Joslin Fld/Magic Valley Regional to George Bush Intcntl/Houston Airport TWF → IAH

1,188 nautical miles (1,367 statute miles) southeast on a straight line, true course 123°, about 110° magnetic at the departure end (variation 13E). At 120 knots that is 8 h 15 min at the quickest height in today's winds (39,000 ft, a 24-knot tailwind), arriving about 11:55 am CDT (16:55 UTC). Right now TWF is VFR, wind from the south-southwest (200°) at 12 knots; IAH is VFR, wind calm. 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: 1 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 first 369 nm of the route.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Near the route, at the departure end.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 389 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 100 to 619 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 42,000 ft. Over the route from 180 to 609 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 379 to 489 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). Over the route from 829 to 839 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

PC12 at 12,000 ft, 36 nm southwest, 1:08 am MDT (07:08 UTC): light turbulence, no icing, 4 °C, remarks: instrument conditions ZDVWC-11. 319 nm along the route, 36 nm southwest of the line.
as filed, and in English
```
GJT UA /OV JNC237019/TM 0708/FL120/TP PC12/TA 04/TB OCNL LGT/IC NEG/RM IMC. ZDVWC-11
```
Report
a routine report filed through GJT
Where
19 nm southwest (237°) of JNC
Time
07:08 UTC
Height
at 12,000 ft
Aircraft
PC12
Temperature
4 °C
Turbulence
occasional light
Icing
none
Remarks
instrument conditions ZDVWC-11
E170 at 4,800 ft, 10 nm southwest, 12:31 am MDT (06:31 UTC): no turbulence, no icing, clear from 4,800 ft to 60,000 ft, remarks: during the descent rnav Y 11 lgjt zdvwc. 339 nm along the route, 10 nm southwest of the line.
as filed, and in English
```
GJT UA /OV GJT/TM 0631/FL048/TP E170/SK SKC/TB NEG/IC NEG/RM DURD RNAV Y 11 LGJT. ZDVWC
```
Report
a routine report filed through GJT
Where
over GJT
Time
06:31 UTC
Height
at 4,800 ft
Aircraft
E170
Sky
clear
Turbulence
none
Icing
none
Remarks
during the descent rnav Y 11 lgjt zdvwc
PC12 at 26,000 ft, 17 nm northeast, 12:27 am MDT (06:27 UTC): light chop turbulence, remarks: ZDVWC-12. 449 nm along the route, 17 nm northeast of the line.
as filed, and in English
```
GUC UA /OV HBU090040/TM 0627/FL260/TP PC12/TB OCNL LGT CHOP/RM ZDVWC-12
```
Report
a routine report filed through GUC
Where
40 nm east (090°) of HBU
Time
06:27 UTC
Height
at 26,000 ft
Aircraft
PC12
Turbulence
occasional light chop
Remarks
ZDVWC-12
GLF6 at 47,000 ft, 8 nm northeast, 1:47 am MDT (07:47 UTC): remarks: moderate mtw +/-1500FPM zdvwc. 459 nm along the route, 8 nm northeast of the line.
as filed, and in English
```
GUC UA /OV HBU105046/TM 0747/FL470/TP GLF6/RM MOD MTW +/-1500FPM. ZDVWC
```
Report
a routine report filed through GUC
Where
46 nm east (105°) of HBU
Time
07:47 UTC
Height
at 47,000 ft
Aircraft
GLF6
Remarks
moderate mtw +/-1500FPM zdvwc
B38M at 37,000 ft, 49 nm northeast, 1:42 am MDT (07:42 UTC): light chop turbulence, remarks: mtw +/-7KT zdvwc. 469 nm along the route, 49 nm northeast of the line.
as filed, and in English
```
PUB UA /OV PUB280055/TM 0742/FL370/TP B38M/TB LGT CHOP/RM MTW +/-7KT. ZDVWC
```
Report
a routine report filed through PUB
Where
55 nm west (280°) of PUB
Time
07:42 UTC
Height
at 37,000 ft
Aircraft
B38M
Turbulence
light chop
Remarks
mtw +/-7KT zdvwc
A320 at 31,000 ft, 43 nm northeast, 12:58 am MDT (06:58 UTC): light chop turbulence, remarks: mtw a 10-knot loss of airspeed 100FT zdvwc. 489 nm along the route, 43 nm northeast of the line.
as filed, and in English
```
PUB UA /OV PUB260040/TM 0658/FL310/TP A320/TB LGT CHOP/RM MTW +/-10KT 100FT. ZDVWC
```
Report
a routine report filed through PUB
Where
40 nm west (260°) of PUB
Time
06:58 UTC
Height
at 31,000 ft
Aircraft
A320
Turbulence
light chop
Remarks
mtw a 10-knot loss of airspeed 100FT zdvwc
A333 at 38,000 ft, 5 nm west, 2:23 am MDT (08:23 UTC): light chop turbulence, remarks: mtw +/-15KT zdvwc. 529 nm along the route, 5 nm west of the line.
as filed, and in English
```
ALS UA /OV ALS085025/TM 0823/FL380/TP A333/TB LGT CHOP/RM MTW +/-15KT. ZDVWC
```
Report
a routine report filed through ALS
Where
25 nm east (085°) of ALS
Time
08:23 UTC
Height
at 38,000 ft
Aircraft
A333
Turbulence
light chop
Remarks
mtw +/-15KT zdvwc

Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 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 11 forecast points nearest it (PIH, SLC, 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 19 kt	+5 kt	20 °C	115 kt	10 h 20 min	2:00 pm CDT (19:00 UTC)
7,500 ft	210° at 19 kt	+3 kt	14 °C	117 kt	10 h 09 min	1:49 pm CDT (18:49 UTC)
9,500 ft	210° at 19 kt	+1 kt	9 °C	119 kt	9 h 59 min	1:39 pm CDT (18:39 UTC)
11,500 ft	220° at 24 kt	−3 kt	4 °C	123 kt	9 h 40 min	1:20 pm CDT (18:20 UTC)
13,500 ft	220° at 28 kt	−3 kt	0 °C	123 kt	9 h 40 min	1:20 pm CDT (18:20 UTC)
15,500 ft	220° at 32 kt	−3 kt	-4 °C	123 kt	9 h 40 min	1:20 pm CDT (18:20 UTC)
17,500 ft	220° at 36 kt	−4 kt	-9 °C	124 kt	9 h 35 min	1:15 pm CDT (18:15 UTC)
18,000 ft FL180	220° at 37 kt	−4 kt	-10 °C	124 kt	9 h 35 min	1:15 pm CDT (18:15 UTC)
24,000 ft FL240	230° at 46 kt	−13 kt	-19 °C	133 kt	8 h 56 min	12:36 pm CDT (17:36 UTC)
30,000 ft FL300	230° at 59 kt	−17 kt	-29 °C	137 kt	8 h 40 min	12:20 pm CDT (17:20 UTC)
34,000 ft FL340	240° at 55 kt	−23 kt	-36 °C	143 kt	8 h 18 min	11:58 am CDT (16:58 UTC)
39,000 ft FL390	250° at 47 kt	−24 kt	-47 °C	144 kt	8 h 15 min	11:55 am CDT (16:55 UTC)

Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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; 74 nm from the line		070/8	150/19 1°	180/32 -4°	210/44 -17°	210/37 -28°	210/74 -31°	220/68 -35°	220/60 -43°
SLC	used from 100 nm out; 33 nm from the line		200/16	210/23 4°	220/34 -3°	210/40 -16°	220/66 -23°	220/64 -31°	220/57 -36°	220/50 -43°
GJT	used from 250 nm out; 64 nm from the line			220/26 6°	230/39 0°	220/55 -13°	230/60 -23°	230/78 -31°	230/80 -35°	230/74 -44°
ALS	used from 399 nm out; 76 nm from the line				240/35 3°	230/54 -9°	240/66 -19°	230/85 -26°	240/87 -34°	240/70 -47°
TCC	used from 599 nm out; 67 nm from the line		240/20	230/22 13°	230/27 6°	230/40 -7°	240/55 -18°	240/74 -27°	240/68 -37°	250/64 -49°
AMA	used from 699 nm out; 19 nm from the line		230/32	230/28 14°	230/27 7°	230/38 -6°	230/50 -17°	250/69 -28°	260/62 -37°	270/65 -49°
LBB	used from 799 nm out; 68 nm from the line		220/25 21°	230/20 15°	220/20 7°	230/36 -6°	240/50 -15°	240/59 -28°	260/52 -37°	260/45 -50°
ABI	used from 848 nm out; 70 nm from the line		200/30 19°	220/12 16°	220/11 9°	230/15 -5°	250/26 -15°	250/39 -28°	270/36 -38°	280/30 -51°
DAL	used from 998 nm out; 71 nm from the line	190/30	200/28 18°	220/18 13°	250/13 8°	240/24 -6°	270/20 -14°	270/35 -29°	290/34 -39°	310/41 -51°
CLL	used from 1048 nm out; 53 nm from the line	180/24	170/21 19°	180/10 14°	230/7 8°	230/16 -6°	260/20 -13°	290/23 -29°	320/21 -39°	340/35 -51°
HOU	used from 1148 nm out; 39 nm from the line	180/22	180/20 16°	170/7 15°	L/V 8°	220/11 -6°	260/15 -13°	310/20 -30°	320/20 -40°	350/32 -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 3,900 feet Weather: light rain	from the south-southwest (200°) at 12 knots	9 mi	3,900 ft	4,153 ft	1:53 am MDT (07:53 UTC)
BYI Burley, ID	20 nm out, 21 nm northeast of the line	marginal VFR Sky: scattered clouds at 800 feet, a broken layer at 2,800 feet, overcast at 4,500 feet Weather: light rain	from the west-southwest (240°) at 9 knots	10+ mi	2,800 ft	4,153 ft	08:33 UTC
OGD Ogden, UT	140 nm out, 5 nm west of the line, tower	VFR Sky: overcast at 6,000 feet Weather: light rain	from the southeast (130°) at 3 knots	10+ mi	6,000 ft	4,472 ft	07:53 UTC
GJT Grand Junction, CO	339 nm out, 10 nm southwest of the line, tower	VFR Sky: a few clouds at 6,000 feet, a broken layer at 8,500 feet, overcast at 11,000 feet	from the east-southeast (120°) at 19 knots, gusting to 26	10+ mi	8,500 ft	4,861 ft	07:53 UTC
GUC Gunnison, CO	419 nm out, 7 nm northeast of the line	VFR	variable at 5 knots	10+ mi	none	7,679 ft	07:56 UTC
RTN Raton, NM	579 nm out, 6 nm west of the line	VFR	from the southwest (220°) at 6 knots	10+ mi	none	6,352 ft	07:53 UTC
DHT Dalhart, TX	679 nm out, 22 nm northeast of the line	VFR	from the south-southwest (200°) at 13 knots	10+ mi	none	3,991 ft	07:53 UTC
AMA Amarillo, TX	739 nm out, 13 nm northeast of the line, tower	VFR	from the southwest (220°) at 17 knots	10+ mi	none	3,606 ft	07:53 UTC
BKD Breckenridge, TX	938 nm out, 8 nm south of the line	VFR	from the south (170°) at 10 knots, gusting to 14	7 mi	none	1,284 ft	08:35 UTC
ACT Waco, TX	1048 nm out, 3 nm east of the line, tower	VFR	from the south (170°) at 10 knots	10+ mi	none	516 ft	07:51 UTC
CLL College Station, TX	1128 nm out, 11 nm southwest of the line, tower	VFR	from the southeast (140°) at 5 knots	10+ mi	none	320 ft	07:53 UTC
IAH Houston, TX	destination	VFR Sky: a few clouds at 3,500 feet, overcast at 23,000 feet	calm	10+ mi	23,000 ft	95 ft	2:53 am CDT (07:53 UTC)

The highest airport on this list sits at 7,679 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, 11:55 am CDT (16:55 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 TWF, the departure

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

Temporary flight restrictions on the line or within 25 nm of it

6/0543 MCGREGOR, TX 13 nm from the route, 1048 nm along the route · security · ZFW

Daylight

Sunset at TWF 6:59 pm MDT (00:59 UTC), at IAH 6:54 pm CDT (23:54 UTC) (civil twilight ends 7:18 pm CDT (00:18 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 Pacific Northwest · loop National Weather Service

Radar now, the southern Rockies · loop National Weather Service

Radar now, the southern Plains · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

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: Joslin Fld/Magic Valley Regional, George Bush Intcntl/Houston Airport.