Plan a flight · Sun 5:51 pm PDT (00:51 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 11 h 45 min at the quickest height in today's winds (39,000 ft, a 20-knot tailwind), arriving about 7:36 am CDT (12:36 UTC). Right now SEA is VFR, wind from the north-northwest (340°) at 10 knots; HOU is VFR, wind from the south-southeast (150°) at 8 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 W71W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the south at 40 knots, until 6:55 pm PDT (01:55 UTC). Over the route from 488 to 588 nm out.

as issued

WSUS33 KKCI 112355
MKCW WST 112355
CONVECTIVE SIGMET 71W
VALID UNTIL 0155Z
WY UT ID
FROM 40S DBS-40WNW BPI-30WSW MTU-30SSW DTA-30SE TWF-40S DBS
AREA EMBD TS MOV FROM 20040KT. TOPS TO FL270.

SIGMET W68W: thunderstorms (a convective SIGMET) up to 36,000 ft, moving from the southwest at 40 knots, until 6:55 pm PDT (01:55 UTC). Over the route from 738 to 1007 nm out.

as issued

WSUS33 KKCI 112355
MKCW WST 112355
CONVECTIVE SIGMET 68W
VALID UNTIL 0155Z
CO NM AZ UT
FROM 30W CHE-20NNW TBE-60SE ABQ-40N SJN-30SW MTU-30W CHE
AREA TS MOV FROM 23040KT. TOPS TO FL360.

AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the route from 110 to 299 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 169 to 867 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 269 to 937 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 548 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 369 to 678 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 518 to 1027 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 548 to 847 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 708 to 757 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

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
A21N at 33,000 ft, 47 nm northeast, 3:35 pm PDT (22:35 UTC): moderate turbulence, remarks: mountain wave +25-30KTS. 767 nm along the route, 47 nm northeast of the line.
as filed, and in English
```
HDN UA /OV CHE/TM 2235/FL330/TP A21N/TB MOD/RM MTN WAVE +25-30KTS
```
Report
a routine report filed through HDN
Where
over CHE
Time
22:35 UTC
Height
at 33,000 ft
Aircraft
A21N
Turbulence
moderate
Remarks
mountain wave +25-30KTS
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
C680 at 18,000 ft, 17 nm southwest, 3:35 pm PDT (22:35 UTC): moderate turbulence, remarks: from 18,000 ft to 10,000 ft. 827 nm along the route, 17 nm southwest of the line.
as filed, and in English
```
ASE UA /OV ASE230020/TM 2235/FL180/TP C680/TB MOD/RM 180-100
```
Report
a routine report filed through ASE
Where
20 nm southwest (230°) of ASE
Time
22:35 UTC
Height
at 18,000 ft
Aircraft
C680
Turbulence
moderate
Remarks
from 18,000 ft to 10,000 ft
C700 at 16,000 ft, 23 nm northeast, 2:55 pm PDT (21:55 UTC): moderate turbulence. 827 nm along the route, 23 nm northeast of the line.
as filed, and in English
```
ASE UA /OV WERNR/TM 2155/FL160/TP C700/TB MOD
```
Report
a routine report filed through ASE
Where
wernr
Time
21:55 UTC
Height
at 16,000 ft
Aircraft
C700
Turbulence
moderate
C680A at 16,000 ft, 4 nm north, 3:59 pm PDT (22:59 UTC): moderate turbulence, scattered clouds above 16,000 ft, remarks: during the descent. 837 nm along the route, 4 nm north of the line.
as filed, and in English
```
ASE UA /OV HAERI/TM 2259/FL160/TP C680A/SK SCT160/TB CONS MOD/RM DURD
```
Report
a routine report filed through ASE
Where
haeri
Time
22:59 UTC
Height
at 16,000 ft
Aircraft
C680A
Sky
scattered clouds from 16,000 ft
Turbulence
continuous moderate
Remarks
during the descent
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
CRJ2 at 19,000 ft, 49 nm northeast, 3:02 pm PDT (22:02 UTC): moderate chop turbulence, remarks: during the climb from KDEN from 12,000 ft to 19,000 ft ZDVWC-41. 907 nm along the route, 49 nm northeast of the line.
as filed, and in English
```
COS UA /OV BRK262015/TM 2202/FL190/TP CRJ2/TB MOD CHOP/RM DURC FROM KDEN 120-190 ZDVWC-41
```
Report
a routine report filed through COS
Where
15 nm west (262°) of BRK
Time
22:02 UTC
Height
at 19,000 ft
Aircraft
CRJ2
Turbulence
moderate chop
Remarks
during the climb from KDEN from 12,000 ft to 19,000 ft ZDVWC-41
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
C210 at 9,000 ft, 50 nm southwest, 3:51 pm PDT (22:51 UTC): light rime icing, -13 °C, remarks: base 080-ZSE. 150 nm along the route, 50 nm southwest of the line.
as filed, and in English
```
PDT UA /OV PDT230040/TM 2251/FL090/TP C210/TA M13/IC LGT RIME/RM BASE 080-ZSE
```
Report
a routine report filed through PDT
Where
40 nm southwest (230°) of PDT
Time
22:51 UTC
Height
at 9,000 ft
Aircraft
C210
Temperature
−13 °C
Icing
light rime
Remarks
base 080-ZSE
E550 at 21,000 ft, 10 nm south, 4:27 pm PDT (23:27 UTC): light turbulence, a few clouds above 7,000 ft, remarks: during the climb zlc. 409 nm along the route, 10 nm south of the line.
as filed, and in English
```
SUN UA /OV SUN/TM 2327/FL210/TP E550/SK FEW070/TB CONS LGT/RM DURC /ZLC
```
Report
a routine report filed through SUN
Where
over SUN
Time
23:27 UTC
Height
at 21,000 ft
Aircraft
E550
Sky
a few clouds from 7,000 ft
Turbulence
continuous light
Remarks
during the climb zlc
C337 at 10,000 ft, 23 nm southwest, 3:04 pm PDT (22:04 UTC): light rime icing, -1 °C. 528 nm along the route, 23 nm southwest of the line.
as filed, and in English
```
LGU UA /OV MLD 35NW/TM 2204/FL100/TP C337/TA M01/IC LGT RIME /ZLC
```
Report
a routine report filed through LGU
Where
mld 35NW
Time
22:04 UTC
Height
at 10,000 ft
Aircraft
C337
Temperature
−1 °C
Icing
light rime zlc
A320 at 33,000 ft, 50 nm northeast, 3:24 pm PDT (22:24 UTC): light to moderate turbulence. 638 nm along the route, 50 nm northeast of the line.
as filed, and in English
```
RKS UA /OV OCS306029/TM 2224/FL330/TP A320/TB CONS LGT OCNL MOD /ZLC
```
Report
a routine report filed through RKS
Where
29 nm northwest (306°) of OCS
Time
22:24 UTC
Height
at 33,000 ft
Aircraft
A320
Turbulence
continuous light occasional moderate zlc

16 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 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 8 kt	+5 kt	12 °C	115 kt	14 h 18 min	10:09 am CDT (15:09 UTC)
7,500 ft	200° at 15 kt	+5 kt	8 °C	115 kt	14 h 18 min	10:09 am CDT (15:09 UTC)
9,500 ft	210° at 16 kt	+4 kt	6 °C	116 kt	14 h 11 min	10:02 am CDT (15:02 UTC)
11,500 ft	210° at 21 kt	+3 kt	2 °C	117 kt	14 h 04 min	9:55 am CDT (14:55 UTC)
13,500 ft	220° at 24 kt	+3 kt	-2 °C	117 kt	14 h 04 min	9:55 am CDT (14:55 UTC)
15,500 ft	220° at 26 kt	+2 kt	-6 °C	118 kt	13 h 56 min	9:47 am CDT (14:47 UTC)
17,500 ft	220° at 28 kt	+1 kt	-10 °C	119 kt	13 h 49 min	9:40 am CDT (14:40 UTC)
18,000 ft FL180	220° at 28 kt	+1 kt	-11 °C	119 kt	13 h 49 min	9:40 am CDT (14:40 UTC)
24,000 ft FL240	220° at 31 kt	−2 kt	-21 °C	122 kt	13 h 29 min	9:20 am CDT (14:20 UTC)
30,000 ft FL300	230° at 39 kt	−7 kt	-31 °C	127 kt	12 h 57 min	8:48 am CDT (13:48 UTC)
34,000 ft FL340	240° at 45 kt	−16 kt	-37 °C	136 kt	12 h 06 min	7:57 am CDT (12:57 UTC)
39,000 ft FL390	250° at 44 kt	−20 kt	-47 °C	140 kt	11 h 45 min	7:36 am CDT (12:36 UTC)

Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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	360/9	350/10 1°	010/10 -5°	030/20 -11°	020/60 -17°	010/86 -26°	360/90 -40°	010/68 -42°	360/31 -43°
YKM	used from 50 nm out; 16 nm from the line	030/16	020/18 0°	030/30 -8°	030/23 -13°	020/40 -23°	010/73 -29°	010/54 -36°	360/29 -37°	330/16 -40°
LWS	used from 150 nm out; 77 nm from the line	010/5	050/14 -2°	040/12 -6°	160/7 -10°	190/30 -22°	200/54 -27°	200/48 -35°	210/40 -37°	230/32 -41°
BOI	used from 299 nm out; 58 nm from the line		330/14 4°	230/5 -2°	220/20 -7°	210/37 -20°	200/59 -26°	200/67 -34°	210/73 -35°	220/62 -41°
PIH	used from 399 nm out; 70 nm from the line		270/10	270/13 1°	210/16 -2°	200/56 -11°	200/51 -23°	200/68 -33°	220/77 -37°	230/73 -44°
SLC	used from 548 nm out; 79 nm from the line		280/8	210/39 5°	210/52 -1°	200/50 -11°	200/56 -23°	220/61 -28°	230/73 -37°	230/73 -45°
RKS	used from 598 nm out; 61 nm from the line			190/43	210/65 3°	210/57 -9°	210/56 -21°	210/47 -33°	230/63 -37°	240/77 -46°
GJT	used from 748 nm out; 54 nm from the line			210/40 11°	210/46 3°	210/61 -10°	210/68 -22°	220/57 -29°	230/59 -36°	240/66 -46°
ALS	used from 847 nm out; 82 nm from the line				210/32 5°	230/48 -8°	230/49 -20°	230/78 -30°	240/74 -36°	240/61 -47°
PUB	used from 897 nm out; 47 nm from the line			210/24 16°	210/28 8°	230/43 -8°	240/42 -21°	240/77 -30°	240/72 -36°	250/51 -47°
TCC	used from 1047 nm out; 82 nm from the line		200/26	200/28 14°	220/25 7°	230/28 -7°	240/41 -19°	240/62 -28°	250/61 -37°	250/49 -49°
AMA	used from 1096 nm out; 57 nm from the line		190/28	220/26 14°	230/27 7°	250/24 -6°	250/32 -16°	240/51 -28°	250/52 -38°	250/51 -50°
LBB	used from 1246 nm out; 82 nm from the line		180/26 20°	210/21 13°	230/21 7°	250/25 -5°	250/34 -16°	250/52 -28°	260/47 -38°	260/49 -50°
SPS	used from 1296 nm out; 60 nm from the line	180/26	200/25 16°	220/19 13°	220/20 9°	230/26 -5°	230/34 -15°	260/37 -28°	270/42 -39°	280/40 -51°
ABI	used from 1346 nm out; 52 nm from the line		180/26 17°	220/18 12°	230/25 8°	230/28 -5°	240/29 -14°	250/35 -28°	270/37 -39°	280/37 -51°
DAL	used from 1445 nm out; 73 nm from the line	180/21	190/24 15°	230/20 12°	220/23 8°	240/22 -5°	230/18 -15°	280/33 -29°	280/36 -39°	300/33 -52°
CLL	used from 1495 nm out; 45 nm from the line	160/18	190/18 16°	200/19 12°	220/14 7°	260/18 -5°	250/20 -13°	290/29 -29°	290/31 -40°	300/22 -53°
HOU	used from 1595 nm out; 25 nm from the line	160/18	160/14 17°	180/19 12°	190/11 8°	260/12 -4°	260/14 -13°	310/26 -30°	310/30 -40°	320/21 -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 2,000 feet, a few clouds at 5,000 feet	from the north-northwest (340°) at 10 knots	10+ mi	none	432 ft	4:53 pm PDT (23:53 UTC)
YKM Yakima, WA	90 nm out, 7 nm southwest of the line, tower	VFR Sky: a broken layer at 8,500 feet	from the north-northeast (020°) at 5 knots	10+ mi	8,500 ft	1,098 ft	23:53 UTC
PDT Pendleton, OR	179 nm out, 13 nm southwest of the line, tower	VFR Sky: overcast at 6,000 feet	from the north (360°) at 7 knots	10+ mi	6,000 ft	1,494 ft	23:53 UTC
PIH Pocatello, ID	488 nm out, 8 nm east of the line, tower	IFR Sky: a broken layer at 700 feet, overcast at 1,300 feet Weather: light rain	from the southwest (230°) at 15 knots	7 mi	700 ft	4,451 ft	23:53 UTC
FBR Fort Bridger, WY	628 nm out, 4 nm west of the line	VFR Sky: scattered clouds at 6,000 feet, scattered clouds at 7,000 feet, a broken layer at 8,000 feet	from the southwest (230°) at 13 knots, gusting to 19	10+ mi	8,000 ft	7,038 ft	00:35 UTC
EGE Eagle, CO	817 nm out, 19 nm northeast of the line, tower	VFR	from the west (280°) at 8 knots	10+ mi	none	6,547 ft	23:56 UTC
ASE Aspen, CO	837 nm out, 4 nm north of the line, tower	VFR Sky: a few clouds at 9,500 feet	from the north-northwest (330°) at 3 knots	10+ mi	none	7,837 ft	23:53 UTC
CAO Clayton, NM	1076 nm out, 1 nm southwest of the line	VFR	from the south (190°) at 20 knots, gusting to 29	10+ mi	none	4,969 ft	23:55 UTC
AMA Amarillo, TX	1176 nm out, 5 nm southwest of the line, tower	VFR	from the south (180°) at 19 knots, gusting to 25	10+ mi	none	3,606 ft	23:53 UTC
SEP Stephenville, TX	1425 nm out, 7 nm south of the line	VFR Sky: scattered clouds at 11,000 feet	from the south (170°) at 5 knots	10+ mi	none	1,321 ft	00:35 UTC
CLL College Station, TX	1565 nm out, 4 nm southwest of the line, tower	VFR	from the south-southeast (150°) at 7 knots	10+ mi	none	320 ft	23:53 UTC
HOU Houston, TX	destination	VFR Sky: scattered clouds at 25,000 feet	from the south-southeast (150°) at 8 knots	10+ mi	none	46 ft	6:53 pm CDT (23:53 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, 7:36 am CDT (12:36 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 6:55 pm CDT (23:55 UTC) (civil twilight ends 7:19 pm CDT (00:19 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.