Plan a flight · Sun 7:39 pm PDT (02:39 UTC)

Seattle-Tacoma International to Valley International SEA → HRL

1,725 nautical miles (1,985 statute miles) southeast on a straight line, true course 129°, about 113° magnetic at the departure end (variation 16E). At 120 knots that is 13 h 29 min at the quickest height in today's winds (34,000 ft, a 8-knot tailwind), arriving about 11:08 am CDT (16:08 UTC). Right now SEA is VFR, wind from the north (360°) at 7 knots; HRL is VFR, wind from the east (100°) at 5 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: 4 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 838 to 1137 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 160 nm of the route.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 110 to 249 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 170 to 788 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 329 to 878 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 339 to 788 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 588 to 1117 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 598 to 738 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 738 to 888 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 878 to 1027 nm out.
AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the route from 1007 to 1127 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 GLF6 at 45,000 ft, 45 nm southwest, 4:57 pm PDT (23:57 UTC): severe turbulence, remarks: a/c had to exit auto pilot, 45 degree pitch-zdv. 858 nm along the route, 45 nm southwest of the line.
as filed, and in English
```
FMN UUA /OV RSK280050/TM 2357/FL450/TP GLF6/TB SEV/RM A/C HAD TO EXIT AUTO PILOT, 45 DEGREE PITCH-ZDV
```
Report
an urgent report filed through FMN
Where
50 nm west (280°) of RSK
Time
23:57 UTC
Height
at 45,000 ft
Aircraft
GLF6
Turbulence
severe
Remarks
a/c had to exit auto pilot, 45 degree pitch-zdv
E75L at 22,000 ft, 5 nm northeast, 6:04 pm PDT (01:04 UTC): moderate turbulence. 668 nm along the route, 5 nm northeast of the line.
as filed, and in English
```
PUC UA /OV PUC320020/TM 0104/FL220/TP E75L/TB MOD /ZLC
```
Report
a routine report filed through PUC
Where
20 nm northwest (320°) of PUC
Time
01:04 UTC
Height
at 22,000 ft
Aircraft
E75L
Turbulence
moderate zlc
S22T at 14,000 ft, 11 nm northeast, 6:23 pm PDT (01:23 UTC): moderate rime icing, -16 °C. 678 nm along the route, 11 nm northeast of the line.
as filed, and in English
```
PUC UA /OV PUC360015/TM 0123/FL140/TP S22T/TA M16/IC MOD RIME /ZLC
```
Report
a routine report filed through PUC
Where
15 nm north (360°) of PUC
Time
01:23 UTC
Height
at 14,000 ft
Aircraft
S22T
Temperature
−16 °C
Icing
moderate rime zlc
SW4 at 15,000 ft, 15 nm northeast, 6:39 pm PDT (01:39 UTC): moderate turbulence, light rime icing, freezing, rain, 0 °C, remarks: instrument conditions ZDVWC-36. 858 nm along the route, 15 nm northeast of the line.
as filed, and in English
```
CEZ UA /OV CEZ030030/TM 0139/FL150/TP SW4/SK BASE150/WX FZ RA/TA 00/TB CONS MOD/IC LGT RIME/RM IMC ZDVWC-36
```
Report
a routine report filed through CEZ
Where
30 nm northeast (030°) of CEZ
Time
01:39 UTC
Height
at 15,000 ft
Aircraft
SW4
Sky
BASE150
Weather
freezing, rain
Temperature
0 °C
Turbulence
continuous moderate
Icing
light rime
Remarks
instrument conditions ZDVWC-36
GLF4 at 43,000 ft, 35 nm southwest, 5:15 pm PDT (00:15 UTC): moderate turbulence, remarks: zdvwc. 858 nm along the route, 35 nm southwest of the line.
as filed, and in English
```
FMN UA /OV RSK290045/TM 0015/FL430/TP GLF4/TB CONS MOD/RM ZDVWC
```
Report
a routine report filed through FMN
Where
45 nm west (290°) of RSK
Time
00:15 UTC
Height
at 43,000 ft
Aircraft
GLF4
Turbulence
continuous moderate
Remarks
zdvwc
GLF4 at 43,000 ft, 17 nm northeast, 5:09 pm PDT (00:09 UTC): moderate chop turbulence, remarks: ZDVWC-38. 868 nm along the route, 17 nm northeast of the line.
as filed, and in English
```
FMN UA /OV RSK360050/TM 0009/FL430/TP GLF4/TB MOD CHOP/RM ZDVWC-38
```
Report
a routine report filed through FMN
Where
50 nm north (360°) of RSK
Time
00:09 UTC
Height
at 43,000 ft
Aircraft
GLF4
Turbulence
moderate chop
Remarks
ZDVWC-38
SB20 at 16,000 ft, 48 nm northeast, 6:52 pm PDT (01:52 UTC): remarks: zse. At the departure end, 48 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, 10 nm south, 6:54 pm PDT (01:54 UTC): remarks: zse. At the departure end, 10 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, 10 nm southwest, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 10 nm southwest 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, 10 nm southwest, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 10 nm southwest 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, 7 nm southwest, 6:18 pm PDT (01:18 UTC): light rime icing, -12 °C, remarks: zse. 110 nm along the route, 7 nm southwest 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 6,000 ft, 30 nm northeast, 5:56 pm PDT (00:56 UTC): overcast above 6,000 ft. 179 nm along the route, 30 nm northeast 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
PC12 at 14,000 ft, 8 nm southwest, 7:13 pm PDT (02:13 UTC): light turbulence up to 21,000 ft, light rime icing from 10,000 ft to 14,000 ft, -10 °C. 399 nm along the route, 8 nm southwest of the line.
as filed, and in English
```
BOI UA /OV BOI117049/TM 0213/FL140/TP PC12/TA M10/TB CONS LGT 210 BLO/IC LGT RIME 140-100 /ZLC
```
Report
a routine report filed through BOI
Where
49 nm southeast (117°) of BOI
Time
02:13 UTC
Height
at 14,000 ft
Aircraft
PC12
Temperature
−10 °C
Turbulence
continuous light at 21,000 ft below
Icing
light rime from 14,000 ft to 10,000 ft zlc
PC12 at 6,000 ft, 48 nm northeast, 6:09 pm PDT (01:09 UTC): scattered clouds up to 6,000 ft, remarks: multiple scattered layers during the descent runway 31. 409 nm along the route, 48 nm northeast of the line.
as filed, and in English
```
SUN UA /OV KSUN/TM 0109/FL060/TP PC12/SK SCT-TOP060/WX FV05SM/RM MULTIPLE SCT LAYERS DURD RY31
```
Report
a routine report filed through SUN
Where
over KSUN
Time
01:09 UTC
Height
at 6,000 ft
Aircraft
PC12
Sky
scattered clouds, tops 6,000 ft
Weather
flight visibility 5 miles
Remarks
multiple scattered layers during the descent runway 31

10 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 15 forecast points nearest it (SEA, YKM, LWS, BOI, PIH, SLC, GJT, FMN, ABQ, ROW, INK, DRT, LRD, CRP, BRO). 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	180° at 11 kt	+9 kt	10 °C	111 kt	15 h 32 min	1:11 pm CDT (18:11 UTC)
7,500 ft	200° at 14 kt	+6 kt	8 °C	114 kt	15 h 08 min	12:47 pm CDT (17:47 UTC)
9,500 ft	210° at 13 kt	+4 kt	5 °C	116 kt	14 h 52 min	12:31 pm CDT (17:31 UTC)
11,500 ft	220° at 16 kt	+3 kt	2 °C	117 kt	14 h 45 min	12:24 pm CDT (17:24 UTC)
13,500 ft	220° at 19 kt	+3 kt	-2 °C	117 kt	14 h 45 min	12:24 pm CDT (17:24 UTC)
15,500 ft	220° at 22 kt	+3 kt	-6 °C	117 kt	14 h 45 min	12:24 pm CDT (17:24 UTC)
17,500 ft	220° at 26 kt	+4 kt	-10 °C	116 kt	14 h 52 min	12:31 pm CDT (17:31 UTC)
18,000 ft FL180	220° at 26 kt	+4 kt	-11 °C	116 kt	14 h 52 min	12:31 pm CDT (17:31 UTC)
24,000 ft FL240	220° at 32 kt	+4 kt	-21 °C	116 kt	14 h 52 min	12:31 pm CDT (17:31 UTC)
30,000 ft FL300	230° at 37 kt	−1 kt	-30 °C	121 kt	14 h 15 min	11:54 am CDT (16:54 UTC)
34,000 ft FL340	240° at 39 kt	−8 kt	-36 °C	128 kt	13 h 29 min	11:08 am CDT (16:08 UTC)
39,000 ft FL390	240° at 35 kt	−7 kt	-45 °C	127 kt	13 h 35 min	11:14 am CDT (16:14 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 199 nm out; 95 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 249 nm out; 72 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 449 nm out; 77 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 499 nm out; 74 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°
GJT	used from 698 nm out; 79 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°
FMN	used from 848 nm out; 37 nm from the line			220/28 9°	220/40 2°	220/53 -10°	220/62 -22°	230/79 -28°	240/91 -34°	230/71 -45°
ABQ	used from 947 nm out; 63 nm from the line			220/27 11°	210/35 5°	220/46 -9°	230/62 -20°	240/78 -25°	240/80 -35°	240/56 -47°
ROW	used from 1097 nm out; 54 nm from the line		190/33	210/27 14°	220/28 6°	230/36 -6°	230/56 -15°	230/63 -27°	250/59 -37°	260/57 -49°
INK	used from 1246 nm out; 32 nm from the line		190/23 20°	200/18 15°	230/18 8°	240/23 -4°	240/37 -14°	240/46 -27°	250/42 -38°	260/36 -50°
DRT	used from 1396 nm out; 55 nm from the line	160/31	170/28 16°	200/14 16°	210/15 9°	210/15 -4°	240/12 -12°	240/18 -28°	300/11 -38°	320/18 -50°
LRD	used from 1546 nm out; 46 nm from the line	150/27	170/24 17°	170/20 14°	180/12 10°	230/19 -4°	160/10 -14°	130/10 -28°	110/7 -39°	010/22 -51°
CRP	used from 1645 nm out; 63 nm from the line	150/24	180/19 19°	190/13 14°	200/14 9°	230/5 -4°	170/6 -14°	360/6 -29°	L/V -40°	350/18 -52°
BRO	used from 1695 nm out; 38 nm from the line	150/22	160/18 18°	160/13 14°	150/9 10°	050/5 -3°	L/V -15°	100/13 -29°	120/15 -40°	080/9 -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, 5 nm northeast 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, 12 nm northeast of the line, tower	VFR Sky: overcast at 7,000 feet	calm	10+ mi	7,000 ft	1,494 ft	01:53 UTC
TWF Twin Falls, ID	449 nm out, 3 nm west of the line, tower	VFR Sky: overcast at 4,000 feet	from the southwest (230°) at 7 knots	10+ mi	4,000 ft	4,153 ft	01:53 UTC
SLC Salt Lake City, UT	598 nm out, 7 nm northeast of the line, tower	VFR Sky: a few clouds at 800 feet, a broken layer at 5,000 feet, overcast at 8,000 feet Weather: light rain	from the south (170°) at 6 knots	10+ mi	5,000 ft	4,230 ft	02:30 UTC
CNY Moab, UT	758 nm out, 2 nm west of the line	VFR Sky: a broken layer at 12,000 feet	from the south-southwest (210°) at 28 knots, gusting to 38	10+ mi	12,000 ft	4,579 ft	01:53 UTC
SAF Santa Fe, NM	1017 nm out, 6 nm north of the line, tower	VFR Sky: scattered clouds at 6,500 feet, a broken layer at 8,000 feet, overcast at 9,500 feet	from the south (180°) at 12 knots, gusting to 20	10+ mi	8,000 ft	6,348 ft	01:53 UTC
ROW Roswell, NM	1167 nm out, 25 nm southwest of the line, tower	VFR	from the south-southeast (150°) at 7 knots	10+ mi	none	3,671 ft	01:51 UTC
HOB Hobbs, NM	1237 nm out, 5 nm east of the line, tower	VFR	from the south-southeast (160°) at 19 knots, gusting to 27	10+ mi	none	3,660 ft	02:35 UTC
CZT Carrizo Springs, TX	1546 nm out, 11 nm southwest of the line	reported, no category	from the southeast (130°) at 10 knots, gusting to 16	10+ mi	none	598 ft	02:15 UTC
HBV Hebbronville, TX	1635 nm out, 7 nm southwest of the line	VFR	from the east-southeast (110°) at 8 knots	10+ mi	none	662 ft	02:15 UTC
HRL Harlingen, TX	destination	VFR Sky: scattered clouds at 5,000 feet	from the east (100°) at 5 knots	10+ mi	none	36 ft	8:52 pm CDT (01:52 UTC)

The highest airport on this list sits at 6,348 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At HRL when you get there the forecast at the estimated arrival, 11:08 am CDT (16:08 UTC)

Wind from the southeast at 14 knots, gusting to 22, visibility more than 6 miles, scattered clouds at 4,500 feet VFR

The whole forecast for HRL

From Sun 7:00 pm CDT (00:00 UTC): wind from the east at 13 knots, visibility more than 6 miles, a few clouds at 5,000 feet
From Sun 8:00 pm CDT (01:00 UTC): wind from the southeast at 8 knots, visibility more than 6 miles, a few clouds at 5,000 feet
From Mon 11:00 am CDT (16:00 UTC): wind from the southeast at 14 knots, gusting to 22, visibility more than 6 miles, scattered clouds at 4,500 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

No temporary flight restriction on or near this route right now.

Daylight

Sunset at SEA 6:27 pm PDT (01:27 UTC), at HRL 7:05 pm CDT (00:05 UTC) (civil twilight ends 7:29 pm CDT (00:29 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: Seattle-Tacoma International, Valley International.