Plan a flight · Sun 4:47 pm PDT (23:47 UTC)

Seattle-Tacoma International to Roswell Air Center Airport SEA → ROW

1,171 nautical miles (1,347 statute miles) southeast on a straight line, true course 130°, about 114° magnetic at the departure end (variation 16E). At 120 knots that is 9 h 09 min at the quickest height in today's winds (39,000 ft, a 8-knot tailwind), arriving about 2:56 am MDT (08:56 UTC), after sunset at the destination. Right now SEA is VFR, wind from the north-northeast (020°) at 9 knots; ROW is VFR, wind from the south-southeast (160°) at 16 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: 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

SIGMET W67W: thunderstorms (a convective SIGMET) up to 28,000 ft, moving from the south at 40 knots, until 5:55 pm PDT (00:55 UTC). Over the route from 496 to 694 nm out.

as issued

WSUS33 KKCI 112255
MKCW WST 112255
CONVECTIVE SIGMET 67W
VALID UNTIL 0055Z
WY UT ID NV
FROM 40S DBS-40WNW BPI-50N HVE-50W DTA-50SSE TWF-40S DBS
AREA EMBD TS MOV FROM 20040KT. TOPS TO FL280.

SIGMET W63W: thunderstorms (a convective SIGMET) up to 37,000 ft, moving from the southwest at 40 knots, until 5:55 pm PDT (00:55 UTC). Over the route from 754 to 1071 nm out.

as issued

WSUS33 KKCI 112255
MKCW WST 112255
CONVECTIVE SIGMET 63W
VALID UNTIL 0055Z
CO NM AZ UT
FROM 30SSW MTU-30NW PUB-20NW TCC-60SE ABQ-40N SJN-30SSW MTU
AREA SEV TS MOV FROM 23040KT. TOPS TO FL370.
WIND GUSTS TO 50KT POSS.

SIGMET W64W: thunderstorms (a convective SIGMET) up to 37,000 ft, moving from the southwest at 40 knots, until 5:55 pm PDT (00:55 UTC). Near the route, 1081 nm along the route.

as issued

WSUS33 KKCI 112255
MKCW WST 112255
CONVECTIVE SIGMET 64W
VALID UNTIL 0055Z
TX NM AZ
FROM 50ENE PGS-60SE ABQ-10W ELP-30E TUS-70SE EED-50ENE PGS
AREA TS MOV FROM 23040KT. TOPS TO FL370.

AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the route from 119 to 268 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 169 to 903 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 308 to 923 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 347 to 764 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 466 to 516 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 565 to 1121 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 595 to 843 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 605 to 665 nm out.
AIRMET TANGO 3W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 784 to 813 nm out.
AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the route from 1002 to 1111 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 PC12 at 13,000 ft, 29 nm northeast, 2:48 pm PDT (21:48 UTC): severe turbulence from 13,000 ft to 14,000 ft, remarks: lots of moderate, moments of severe. 565 nm along the route, 29 nm northeast of the line.
as filed, and in English
```
SLC UUA /OV OGD280010/TM 2148/FL130/TP PC12/TB SEV 140-130/RM LOTS OF MODERATE, MOMENTS OF SEV
```
Report
an urgent report filed through SLC
Where
10 nm west (280°) of OGD
Time
21:48 UTC
Height
at 13,000 ft
Aircraft
PC12
Turbulence
severe from 14,000 ft to 13,000 ft
Remarks
lots of moderate, moments of severe
urgent BCS3 at 5,400 ft, 7 nm east, 4:35 pm PDT (23:35 UTC): remarks: wind shear 10 knots gain 1000 above ground on final. 625 nm along the route, 7 nm east of the line.
as filed, and in English
```
PVU UUA /OV PVU310001/TM 2335/FL054/TP BCS3/RM WIND SHEAR 10 KT GAIN 1000 AGL ON FINAL
```
Report
an urgent report filed through PVU
Where
1 nm northwest (310°) of PVU
Time
23:35 UTC
Height
at 5,400 ft
Aircraft
BCS3
Remarks
wind shear 10 knots gain 1000 above ground on final
B738 at 21,000 ft, 39 nm southwest, 2:06 pm PDT (21:06 UTC): moderate turbulence, remarks: during the descent zlc. 337 nm along the route, 39 nm southwest of the line.
as filed, and in English
```
BOI UA /OV BOI220040/TM 2106/FL210/TP B738/TB MOD/RM DURD /ZLC
```
Report
a routine report filed through BOI
Where
40 nm southwest (220°) of BOI
Time
21:06 UTC
Height
at 21,000 ft
Aircraft
B738
Turbulence
moderate
Remarks
during the descent zlc
PC12 at 16,000 ft, 32 nm northeast, 2:01 pm PDT (21:01 UTC): moderate turbulence, light rime icing from 16,000 ft to 23,000 ft, -8 °C, remarks: during the descent. 556 nm along the route, 32 nm northeast of the line.
as filed, and in English
```
SLC UA /OV OGD300020/TM 2101/FL160/TP PC12/TA M08/TB MOD TURB/IC LT RIME 230-160/RM DURD
```
Report
a routine report filed through SLC
Where
20 nm northwest (300°) of OGD
Time
21:01 UTC
Height
at 16,000 ft
Aircraft
PC12
Temperature
−8 °C
Turbulence
moderate turbulence
Icing
lt rime from 23,000 ft to 16,000 ft
Remarks
during the descent
A339 at 16,000 ft, 44 nm northeast, 4:35 pm PDT (23:35 UTC): moderate chop turbulence up to 16,000 ft, remarks: during the climb zlc. 585 nm along the route, 44 nm northeast 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 14,500 ft, 38 nm northeast, 4:05 pm PDT (23:05 UTC): moderate turbulence up to 15,800 ft, heavy rain, remarks: during the climb zlc. 585 nm along the route, 38 nm northeast of the line.
as filed, and in English
```
OGD UA /OV OGD086008/TM 2305/FL145/TP E75L/WX +RA/TB MOD 158 BLO/RM DURC /ZLC
```
Report
a routine report filed through OGD
Where
8 nm east (086°) of OGD
Time
23:05 UTC
Height
at 14,500 ft
Aircraft
E75L
Weather
heavy rain
Turbulence
moderate at 15,800 ft below
Remarks
during the climb zlc
B739 at 11,000 ft, 10 nm northeast, 3:40 pm PDT (22:40 UTC): moderate turbulence, no icing, -4 °C, wind 180° at 40 knots, remarks: during the descent. 585 nm along the route, 10 nm northeast of the line.
as filed, and in English
```
SLC UA /OV TCH240014/TM 2240/FL110/TP B739/TA M04/WV 180040/TB CONT MOD /IC NEG/RM DURD
```
Report
a routine report filed through SLC
Where
14 nm southwest (240°) of TCH
Time
22:40 UTC
Height
at 11,000 ft
Aircraft
B739
Temperature
−4 °C
Wind
from 180° at 40 knots
Turbulence
continuous moderate
Icing
none
Remarks
during the descent
E75L at 12,500 ft, 35 nm northeast, 3:25 pm PDT (22:25 UTC): moderate turbulence. 585 nm along the route, 35 nm northeast of the line.
as filed, and in English
```
HIF UA /OV HIF103005/TM 2225/FL125/TP E75L/TB MOD /ZLC
```
Report
a routine report filed through HIF
Where
5 nm east (103°) of HIF
Time
22:25 UTC
Height
at 12,500 ft
Aircraft
E75L
Turbulence
moderate zlc
A320 at 6,600 ft, 17 nm northeast, 2:55 pm PDT (21:55 UTC): moderate turbulence, -2 °C, wind 200° at 55 knots, remarks: during the climb from 6,600 ft to 10,000 ft. 585 nm along the route, 17 nm northeast of the line.
as filed, and in English
```
SLC UA /OV TCH250007/TM 2155/FL066/TP A320/SK BASE 066 TOPS UNK/TA -2/WV 20055KT/TB OCNL MOD TURB/RM DURC 066-100
```
Report
a routine report filed through SLC
Where
7 nm west (250°) of TCH
Time
21:55 UTC
Height
at 6,600 ft
Aircraft
A320
Sky
base 6,600 ft tops unknown
Temperature
-2
Wind
from 200° at 55 knots
Turbulence
occasional moderate turbulence
Remarks
during the climb from 6,600 ft to 10,000 ft
B737 at 12,000 ft, 14 nm northeast, 2:22 pm PDT (21:22 UTC): light turbulence, moderate rime icing, -1 °C, remarks: during the climb from 7,000 ft to 14,500 ft. 585 nm along the route, 14 nm northeast of the line.
as filed, and in English
```
SLC UA /OV TCH240010/TM 2122/FL120/TP B737/TA M01/TB LGT OCNL ,OD TURB/IC MOD RIME/RM DURC 070-145
```
Report
a routine report filed through SLC
Where
10 nm southwest (240°) of TCH
Time
21:22 UTC
Height
at 12,000 ft
Aircraft
B737
Temperature
−1 °C
Turbulence
light occasional, od turbulence
Icing
moderate rime
Remarks
during the climb from 7,000 ft to 14,500 ft
PA44 at 6,000 ft, 6 nm east, 4:25 pm PDT (23:25 UTC): moderate turbulence, remarks: runway in sight at at 6,400 ft. 625 nm along the route, 6 nm east of the line.
as filed, and in English
```
PVU UA /OV PVU310002/TM 2325/FL060/TP PA44/TB MOD /RM RWY IN SIGHT AT 064
```
Report
a routine report filed through PVU
Where
2 nm northwest (310°) of PVU
Time
23:25 UTC
Height
at 6,000 ft
Aircraft
PA44
Turbulence
moderate
Remarks
runway in sight at at 6,400 ft
E545 at 45,000 ft, 10 nm southwest, 3:29 pm PDT (22:29 UTC): moderate chop turbulence, remarks: zdvwc. 893 nm along the route, 10 nm southwest of the line.
as filed, and in English
```
FMN UA /OV RSK2950301/TM 2229/FL450/TP E545/TB MOD CHOP/RM ZDVWC
```
Report
a routine report filed through FMN
Where
301 nm southwest (950°) of RSK2
Time
22:29 UTC
Height
at 45,000 ft
Aircraft
E545
Turbulence
moderate chop
Remarks
zdvwc
C210 at 9,000 ft, 24 nm southwest, 3:51 pm PDT (22:51 UTC): light rime icing, -13 °C, remarks: base 080-ZSE. 159 nm along the route, 24 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
GL7T at 40,000 ft, 23 nm northeast, 2:35 pm PDT (21:35 UTC): light to moderate turbulence from 37,500 ft to 40,000 ft, remarks: durd-zse. 198 nm along the route, 23 nm northeast of the line.
as filed, and in English
```
PDT UA /OV PDT100030/TM 2135/FL400/TP GL7T/TB OCNL LGT-MOD 400-375/RM DURD-ZSE
```
Report
a routine report filed through PDT
Where
30 nm east (100°) of PDT
Time
21:35 UTC
Height
at 40,000 ft
Aircraft
GL7T
Turbulence
occasional light to moderate from 40,000 ft to 37,500 ft
Remarks
durd-zse

15 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 10 forecast points nearest it (SEA, YKM, LWS, BOI, PIH, SLC, GJT, FMN, ABQ, ROW). 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	330° at 6 kt	−5 kt	4 °C	125 kt	9 h 22 min	3:09 am MDT (09:09 UTC)
7,500 ft	220° at 11 kt	+2 kt	5 °C	118 kt	9 h 55 min	3:42 am MDT (09:42 UTC)
9,500 ft	210° at 16 kt	+5 kt	3 °C	115 kt	10 h 11 min	3:58 am MDT (09:58 UTC)
11,500 ft	210° at 21 kt	+6 kt	-1 °C	114 kt	10 h 16 min	4:03 am MDT (10:03 UTC)
13,500 ft	210° at 24 kt	+7 kt	-5 °C	113 kt	10 h 22 min	4:09 am MDT (10:09 UTC)
15,500 ft	210° at 27 kt	+8 kt	-9 °C	112 kt	10 h 27 min	4:14 am MDT (10:14 UTC)
17,500 ft	210° at 29 kt	+10 kt	-13 °C	110 kt	10 h 39 min	4:26 am MDT (10:26 UTC)
18,000 ft FL180	210° at 30 kt	+10 kt	-14 °C	110 kt	10 h 39 min	4:26 am MDT (10:26 UTC)
24,000 ft FL240	220° at 34 kt	+6 kt	-23 °C	114 kt	10 h 16 min	4:03 am MDT (10:03 UTC)
30,000 ft FL300	230° at 46 kt	+2 kt	-31 °C	118 kt	9 h 55 min	3:42 am MDT (09:42 UTC)
34,000 ft FL340	230° at 52 kt	−4 kt	-36 °C	124 kt	9 h 27 min	3:14 am MDT (09:14 UTC)
39,000 ft FL390	240° at 51 kt	−8 kt	-44 °C	128 kt	9 h 09 min	2:56 am MDT (08:56 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; 17 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 198 nm out; 99 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 248 nm out; 74 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 446 nm out; 87 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 496 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°
GJT	used from 694 nm out; 93 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°
FMN	used from 794 nm out; 78 nm from the line			220/25 13°	220/28 4°	210/51 -9°	220/59 -21°	230/78 -30°	230/77 -36°	230/66 -46°
ABQ	used from 942 nm out; 59 nm from the line			200/28 13°	210/28 5°	210/44 -7°	230/46 -20°	230/80 -28°	240/74 -35°	240/58 -47°
ROW	used from 1091 nm out; 55 nm from the line		180/23	190/24 15°	210/27 7°	230/35 -6°	240/53 -17°	240/62 -27°	250/64 -38°	260/60 -50°

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-northeast (020°) at 9 knots	10+ mi	none	432 ft	3:53 pm PDT (22:53 UTC)
YKM Yakima, WA	89 nm out, 7 nm northeast of the line, tower	VFR Sky: overcast at 8,000 feet	from the northeast (040°) at 9 knots	10+ mi	8,000 ft	1,098 ft	22:53 UTC
PDT Pendleton, OR	179 nm out, 16 nm northeast of the line, tower	VFR Sky: overcast at 6,000 feet	from the north-northeast (020°) at 8 knots	10+ mi	6,000 ft	1,494 ft	22:53 UTC
BOI Boise, ID	347 nm out, 1 nm northwest of the line, tower	VFR Sky: overcast at 6,500 feet	from the north-northwest (340°) at 9 knots	10+ mi	6,500 ft	2,871 ft	22:53 UTC
TWF Twin Falls, ID	446 nm out, 8 nm northeast of the line, tower	VFR Sky: overcast at 3,700 feet	from the west-southwest (240°) at 4 knots	10+ mi	3,700 ft	4,153 ft	22:53 UTC
PVU Provo, UT	635 nm out, 7 nm north of the line, tower	VFR Sky: a broken layer at 4,700 feet, overcast at 6,500 feet Weather: light rain	from the west-southwest (240°) at 21 knots, gusting to 32	6 mi	4,700 ft	4,496 ft	22:56 UTC
CNY Moab, UT	754 nm out, 15 nm northeast of the line	VFR Sky: a few clouds at 8,000 feet, a few clouds at 10,000 feet	from the south (170°) at 20 knots, gusting to 30	10+ mi	none	4,579 ft	22:53 UTC
FMN Farmington, NM	893 nm out, 10 nm southwest of the line, tower	VFR Sky: a few clouds at 8,000 feet, scattered clouds at 10,000 feet	from the south-southwest (210°) at 16 knots, gusting to 28	10+ mi	none	5,506 ft	22:53 UTC
ABQ Albuquerque, NM	1022 nm out, 15 nm southwest of the line, tower	VFR Sky: a few clouds at 7,500 feet, a broken layer at 9,000 feet, a broken layer at 20,000 feet	from the south-southwest (210°) at 17 knots, gusting to 29	10+ mi	9,000 ft	5,354 ft	23:35 UTC
ROW Roswell, NM	destination	VFR	from the south-southeast (160°) at 16 knots	10+ mi	none	3,671 ft	4:51 pm MDT (22:51 UTC)

The highest airport on this list sits at 5,506 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At ROW when you get there the forecast at the estimated arrival, 2:56 am MDT (08:56 UTC)

Wind from the south at 11 knots, visibility more than 6 miles, scattered clouds at 9,000 feet, a broken layer at 15,000 feet VFR

The whole forecast for ROW

From Sun 6:00 pm MDT (00:00 UTC): wind from the south at 14 knots, gusting to 24, visibility more than 6 miles, a few clouds at 9,000 feet
From Sun 8:00 pm MDT (02:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, scattered clouds at 9,000 feet, a broken layer at 15,000 feet
30% chance between Sun 9:00 pm MDT (03:00 UTC) and 12:00 am MDT (06:00 UTC): wind variable at 15 knots, gusting to 25, visibility 6 miles, light thunderstorms with rain, a broken layer at 9,000 feet (thunderheads)
From Mon 3:00 am MDT (09:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, scattered clouds at 20,000 feet
From Mon 2:00 pm MDT (20:00 UTC): wind from the south at 13 knots, gusting to 21, visibility more than 6 miles, scattered clouds at 8,000 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

6/8722 ALAMOGORDO, NM, Tuesday, October 13, 2026 Local 12 nm from the route, 1111 nm along the route · security · starts Tuesday 13 October · ZAB

Daylight

Sunset at SEA 6:27 pm PDT (01:27 UTC), at ROW 6:28 pm MDT (00:28 UTC) (civil twilight ends 6:53 pm MDT (00:53 UTC)). At 120 knots the arrival at ROW is before sunrise there (7:00 am MDT (13:00 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, 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, Roswell Air Center Airport.