Plan a flight · Sun 7:33 pm PDT (02:33 UTC)

Seattle-Tacoma International to William P Hobby Airport SEA → HOU

1,645 nautical miles (1,893 statute miles) southeast on a straight line, true course 121°, about 105° magnetic at the departure end (variation 16E). At 120 knots that is 12 h 06 min at the quickest height in today's winds (39,000 ft, a 16-knot tailwind), arriving about 9:39 am CDT (14:39 UTC). Right now SEA is VFR, wind from the north (360°) at 7 knots; HOU 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: 241 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 8:55 pm PDT (03:55 UTC). Over the route from 877 to 1037 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 TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 140 nm of the route.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 100 to 259 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 169 to 738 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 299 to 1007 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 329 to 748 nm out.
AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 359 to 568 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 548 to 1057 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 618 to 927 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 678 to 678 nm out.
AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 678 to 738 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 827 to 937 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 SEA.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

urgent B407 at 10,000 ft, 46 nm northeast, 7:13 pm PDT (02:13 UTC): moderate to severe turbulence. 917 nm along the route, 46 nm northeast of the line.
as filed, and in English
```
COS UUA /OV 10 W COS/TM 0213/FL100/TP B407/TB MDT-SEV
```
Report
an urgent report filed through COS
Where
10 west cos
Time
02:13 UTC
Height
at 10,000 ft
Aircraft
B407
Turbulence
mdt-sev
A339 at 16,000 ft, 50 nm southwest, 4:35 pm PDT (23:35 UTC): moderate chop turbulence up to 16,000 ft, remarks: during the climb zlc. 578 nm along the route, 50 nm southwest of the line.
as filed, and in English
```
OGD UA /OV OGD063012/TM 2335/FL160/TP A339/TB MOD CHOP 160 BLO/RM DURC /ZLC
```
Report
a routine report filed through OGD
Where
12 nm northeast (063°) of OGD
Time
23:35 UTC
Height
at 16,000 ft
Aircraft
A339
Turbulence
moderate chop at 16,000 ft below
Remarks
during the climb zlc
E75L at 28,000 ft, 30 nm northeast, 6:31 pm PDT (01:31 UTC): moderate turbulence, remarks: ZDVWC-03. 787 nm along the route, 30 nm northeast of the line.
as filed, and in English
```
EEO UA /OV EKR085036/TM 0131/FL280/TP E75L/TB MOD/RM ZDVWC-03
```
Report
a routine report filed through EEO
Where
36 nm east (085°) of EKR
Time
01:31 UTC
Height
at 28,000 ft
Aircraft
E75L
Turbulence
moderate
Remarks
ZDVWC-03
C650 at 40,000 ft, 11 nm northeast, 4:48 pm PDT (23:48 UTC): moderate turbulence, remarks: ZDVWC-03. 827 nm along the route, 11 nm northeast of the line.
as filed, and in English
```
ASE UA /OV DBL/TM 2348/FL400/TP C650/TB MOD /RM ZDVWC-03
```
Report
a routine report filed through ASE
Where
over DBL
Time
23:48 UTC
Height
at 40,000 ft
Aircraft
C650
Turbulence
moderate
Remarks
ZDVWC-03
UAL2238 at 38,000 ft, 46 nm southwest, 4:44 pm PDT (23:44 UTC): moderate turbulence, wind 244° at 64 knots. 877 nm along the route, 46 nm southwest 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
B738 at 18,000 ft, 42 nm northeast, 7:02 pm PDT (02:02 UTC): moderate chop turbulence from 18,000 ft to 25,000 ft, remarks: during the climb ZDVWC-41. 897 nm along the route, 42 nm northeast of the line.
as filed, and in English
```
COS UA /OV BRK270030/TM 0202/FL180/TP B738/TB MOD CHOP 180-250/RM DURC ZDVWC-41
```
Report
a routine report filed through COS
Where
30 nm west (270°) of BRK
Time
02:02 UTC
Height
at 18,000 ft
Aircraft
B738
Turbulence
moderate chop from 18,000 ft to 25,000 ft
Remarks
during the climb ZDVWC-41
BE9L at 24,500 ft, 6 nm north, 7:21 pm PDT (02:21 UTC): moderate turbulence, remarks: ZDVWC-41. 937 nm along the route, 6 nm north of the line.
as filed, and in English
```
PUB UA /OV PUB250040/TM 0221/FL245/TP BE9L/TB OCNL MOD/RM ZDVWC-41
```
Report
a routine report filed through PUB
Where
40 nm west (250°) of PUB
Time
02:21 UTC
Height
at 24,500 ft
Aircraft
BE9L
Turbulence
occasional moderate
Remarks
ZDVWC-41
SB20 at 16,000 ft, 45 nm northeast, 6:52 pm PDT (01:52 UTC): remarks: zse. At the departure end, 45 nm northeast of the line.
as filed, and in English
```
PAE UA /OV PAE075045/TM 0152/FL160/TP SB20/SK TOP120/RM ZSE
```
Report
a routine report filed through PAE
Where
45 nm east (075°) of PAE
Time
01:52 UTC
Height
at 16,000 ft
Aircraft
SB20
Sky
TOP120
Remarks
zse
A321 at 13,500 ft, 15 nm south, 6:54 pm PDT (01:54 UTC): remarks: zse. At the departure end, 15 nm south of the line.
as filed, and in English
```
SEA UA /OV SEA120045/TM 0154/FL135/TP A321/SK TOP130/RM ZSE
```
Report
a routine report filed through SEA
Where
45 nm southeast (120°) of SEA
Time
01:54 UTC
Height
at 13,500 ft
Aircraft
A321
Sky
TOP130
Remarks
zse
PC12 at 15,000 ft, 15 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 15 nm south of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL150/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 15,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
PC12 at 13,000 ft, 15 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 15 nm south of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL130/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 13,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
C337 at 12,000 ft, 22 nm south, 6:18 pm PDT (01:18 UTC): light rime icing, -12 °C, remarks: zse. 100 nm along the route, 22 nm south of the line.
as filed, and in English
```
YKM UA /OV YKM155020/TM 0118/FL120/TP C337/TA M12/IC LGT RIME/RM ZSE
```
Report
a routine report filed through YKM
Where
20 nm southeast (155°) of YKM
Time
01:18 UTC
Height
at 12,000 ft
Aircraft
C337
Temperature
−12 °C
Icing
light rime
Remarks
zse
PC12 at 13,500 ft, 33 nm northeast, 6:08 pm PDT (01:08 UTC): no turbulence, a trace of icing, overcast from 9,000 ft to 13,500 ft, -10 °C. 140 nm along the route, 33 nm northeast of the line.
as filed, and in English
```
PSC UA /OV PSC360025/TM 0108/FL135/TP PC12/SK OVC090-TOP135/TA M10/TB NEG /IC TRACE RM 135-090
```
Report
a routine report filed through PSC
Where
25 nm north (360°) of PSC
Time
01:08 UTC
Height
at 13,500 ft
Aircraft
PC12
Sky
overcast from 9,000 ft, tops 13,500 ft
Temperature
−10 °C
Turbulence
none
Icing
trace remarks from 13,500 ft to 9,000 ft
PC12 at 6,000 ft, 6 nm east, 5:56 pm PDT (00:56 UTC): overcast above 6,000 ft. 179 nm along the route, 6 nm east of the line.
as filed, and in English
```
ALW UA /OV ALW200015/TM 0056/FL060/TP PC12/SK OVC060
```
Report
a routine report filed through ALW
Where
15 nm south (200°) of ALW
Time
00:56 UTC
Height
at 6,000 ft
Aircraft
PC12
Sky
overcast from 6,000 ft

15 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 18 forecast points nearest it (SEA, YKM, LWS, BOI, PIH, SLC, RKS, GJT, ALS, PUB, TCC, AMA, LBB, SPS, 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	190° at 13 kt	+8 kt	11 °C	112 kt	14 h 41 min	12:14 pm CDT (17:14 UTC)
7,500 ft	210° at 17 kt	+4 kt	7 °C	116 kt	14 h 11 min	11:44 am CDT (16:44 UTC)
9,500 ft	220° at 16 kt	+1 kt	5 °C	119 kt	13 h 49 min	11:22 am CDT (16:22 UTC)
11,500 ft	230° at 17 kt	−2 kt	2 °C	122 kt	13 h 29 min	11:02 am CDT (16:02 UTC)
13,500 ft	230° at 19 kt	−2 kt	-2 °C	122 kt	13 h 29 min	11:02 am CDT (16:02 UTC)
15,500 ft	220° at 22 kt	0	-6 °C	120 kt	13 h 42 min	11:15 am CDT (16:15 UTC)
17,500 ft	220° at 24 kt	+1 kt	-10 °C	119 kt	13 h 49 min	11:22 am CDT (16:22 UTC)
18,000 ft FL180	220° at 25 kt	+1 kt	-11 °C	119 kt	13 h 49 min	11:22 am CDT (16:22 UTC)
24,000 ft FL240	220° at 31 kt	0	-22 °C	120 kt	13 h 42 min	11:15 am CDT (16:15 UTC)
30,000 ft FL300	240° at 41 kt	−11 kt	-30 °C	131 kt	12 h 33 min	10:06 am CDT (15:06 UTC)
34,000 ft FL340	240° at 41 kt	−15 kt	-36 °C	135 kt	12 h 11 min	9:44 am CDT (14:44 UTC)
39,000 ft FL390	250° at 38 kt	−16 kt	-45 °C	136 kt	12 h 06 min	9:39 am CDT (14:39 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
SEA	used from 0 nm out; 25 nm from the line	050/7	050/11 1°	050/12 -5°	030/31 -7°	010/61 -15°	010/69 -26°	360/73 -40°	360/62 -47°	330/21 -43°
YKM	used from 50 nm out; 16 nm from the line	070/10	040/15 -1°	020/27 -8°	030/25 -13°	020/48 -20°	010/83 -27°	010/77 -37°	010/49 -40°	350/14 -41°
LWS	used from 150 nm out; 77 nm from the line	070/10	080/12 -2°	030/12 -6°	080/7 -10°	170/34 -21°	160/46 -32°	200/33 -35°	220/22 -35°	230/18 -38°
BOI	used from 299 nm out; 58 nm from the line		300/7 2°	280/5 -4°	210/16 -9°	210/60 -20°	210/75 -29°	210/63 -32°	220/64 -32°	220/54 -39°
PIH	used from 399 nm out; 70 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 548 nm out; 79 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°
RKS	used from 598 nm out; 61 nm from the line			200/41	220/44 1°	220/35 -11°	220/46 -24°	210/53 -27°	220/62 -35°	230/61 -44°
GJT	used from 748 nm out; 54 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 847 nm out; 82 nm from the line				230/37 4°	220/54 -9°	230/62 -22°	240/77 -26°	240/74 -33°	230/59 -45°
PUB	used from 897 nm out; 47 nm from the line			230/25 13°	230/32 6°	220/44 -8°	230/49 -21°	240/70 -28°	240/67 -34°	240/58 -46°
TCC	used from 1047 nm out; 82 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 1096 nm out; 57 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 1246 nm out; 82 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°
SPS	used from 1296 nm out; 60 nm from the line	200/39	220/28 17°	230/27 12°	240/15 9°	250/15 -4°	250/24 -15°	260/45 -28°	270/43 -39°	280/45 -51°
ABI	used from 1346 nm out; 52 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 1445 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 1495 nm out; 45 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 1595 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
SEA Seattle, WA	departure	VFR Sky: a few clouds at 3,000 feet	from the north (360°) at 7 knots	10+ mi	none	432 ft	6:53 pm PDT (01:53 UTC)
YKM Yakima, WA	90 nm out, 7 nm southwest of the line, tower	VFR Sky: overcast at 9,500 feet	from the west-northwest (290°) at 6 knots	10+ mi	9,500 ft	1,098 ft	01:53 UTC
PDT Pendleton, OR	179 nm out, 13 nm southwest of the line, tower	VFR Sky: overcast at 7,000 feet	calm	10+ mi	7,000 ft	1,494 ft	01:53 UTC
PIH Pocatello, ID	488 nm out, 8 nm east of the line, tower	VFR Sky: scattered clouds at 1,200 feet, a broken layer at 7,500 feet, overcast at 8,500 feet Weather: light rain	from the west-southwest (250°) at 12 knots	10+ mi	7,500 ft	4,451 ft	01:53 UTC
FBR Fort Bridger, WY	628 nm out, 4 nm west of the line	VFR Sky: overcast at 5,500 feet	from the west (260°) at 17 knots, gusting to 25	10+ mi	5,500 ft	7,038 ft	02:15 UTC
EGE Eagle, CO	817 nm out, 19 nm northeast of the line, tower	VFR Sky: a broken layer at 8,000 feet, overcast at 9,500 feet	from the west (260°) at 7 knots	10+ mi	8,000 ft	6,547 ft	01:56 UTC
ASE Aspen, CO	837 nm out, 4 nm north of the line, tower	VFR Sky: scattered clouds at 6,000 feet, overcast at 7,500 feet Weather: light rain	calm	10+ mi	7,500 ft	7,837 ft	01:53 UTC
CAO Clayton, NM	1076 nm out, 1 nm southwest of the line	VFR	from the south (190°) at 20 knots	10+ mi	none	4,969 ft	01:55 UTC
AMA Amarillo, TX	1176 nm out, 5 nm southwest of the line, tower	VFR	from the south (170°) at 19 knots, gusting to 27	10+ mi	none	3,606 ft	01:53 UTC
SEP Stephenville, TX	1425 nm out, 7 nm south of the line	VFR	from the south (170°) at 4 knots	10+ mi	none	1,321 ft	02:15 UTC
CLL College Station, TX	1565 nm out, 4 nm southwest of the line, tower	VFR	from the south-southeast (150°) at 11 knots	10+ mi	none	320 ft	01:53 UTC
HOU Houston, TX	destination	VFR Sky: a few clouds at 25,000 feet	from the southeast (140°) at 6 knots	10+ mi	none	46 ft	8:53 pm CDT (01:53 UTC)

The highest airport on this list sits at 7,837 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At HOU when you get there the forecast at the estimated arrival, 9:39 am CDT (14:39 UTC)

Wind from the east-southeast at 5 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, scattered clouds at 25,000 feet VFR

The whole forecast for HOU

From Sun 7:00 pm CDT (00:00 UTC): wind from the southeast at 12 knots, visibility more than 6 miles, a few clouds at 25,000 feet
From Sun 8:00 pm CDT (01:00 UTC): wind from the 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 5 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, scattered clouds at 25,000 feet
From Mon 11:00 am CDT (16:00 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 11:00 am CDT (16:00 UTC) and 1:00 pm CDT (18:00 UTC): light rain showers
From Mon 5:00 pm CDT (22:00 UTC): wind from the southeast at 13 knots, visibility more than 6 miles, overcast at 5,000 feet

The forecast for SEA, the departure

From Sun 5:00 pm PDT (00:00 UTC): wind from the north at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 2,000 feet, a few clouds at 5,000 feet
From Sun 8:00 pm PDT (03:00 UTC): wind from the northeast at 6 knots, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind from the southeast at 4 knots, visibility more than 6 miles, patches of fog, clear skies
From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 4 knots, visibility more than 6 miles, clear skies
From Mon 11:00 am PDT (18:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind from the northwest at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

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

6/0543 MCGREGOR, TX 11 nm from the route, 1495 nm along the route · security · ZFW

Daylight

Sunset at SEA 6:27 pm PDT (01:27 UTC), at HOU 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 northern Rockies · loop National Weather Service

Radar now, the southern Rockies · 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: Seattle-Tacoma International, William P Hobby Airport.