Plan a flight · Sun 7:32 pm PDT (02:32 UTC)

Seattle-Tacoma International to Wilmington International SEA → ILM

2,132 nautical miles (2,453 statute miles) east on a straight line, true course 095°, about 079° magnetic at the departure end (variation 16E). At 120 knots that is 13 h 25 min at the quickest height in today's winds (39,000 ft, a 39-knot tailwind), arriving about 11:57 am EDT (15:57 UTC). Right now SEA is VFR, wind from the north (360°) at 7 knots; ILM is VFR, wind from the west-southwest (250°) at 11 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 8W: thunderstorms (a convective SIGMET) up to 35,000 ft, moving from the southwest at 40 knots, until 8:55 pm PDT (03:55 UTC). Over the route from 648 to 657 nm out.

as issued

WSUS33 KKCI 120155
MKCW WST 120155
CONVECTIVE SIGMET 8W
VALID UNTIL 0355Z
CO MT WY
FROM 40N SHR-60WNW RAP-20ENE CYS-30SW CYS-10NW BOY-40N SHR
AREA TS MOV FROM 22040KT. TOPS TO FL350.

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 149 nm of the route.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 100 to 448 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 209 to 618 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 857 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 289 to 946 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 568 to 628 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Near the route, 598 nm along the route.
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 1156 to 1305 nm out.
AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 1743 to 1913 nm out.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1793 to 1933 nm out.
AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 8,000 ft. Over the route from 1883 to 1992 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

A321 at 30,000 ft, 4 nm south, 4:45 pm PDT (23:45 UTC): moderate turbulence. 1823 nm along the route, 4 nm south of the line.
as filed, and in English
```
IND UA /OV AZQ170020/TM 2345/FL300/TP A321/TB MOD
```
Report
a routine report filed through IND
Where
20 nm south (170°) of AZQ
Time
23:45 UTC
Height
at 30,000 ft
Aircraft
A321
Turbulence
moderate
A321 at 13,500 ft, 32 nm south, 6:54 pm PDT (01:54 UTC): remarks: zse. At the departure end, 32 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, 32 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 32 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, 32 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 32 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
SB20 at 16,000 ft, 29 nm north, 6:52 pm PDT (01:52 UTC): remarks: zse. At the departure end, 29 nm north 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
PC12 at 13,500 ft, 31 nm south, 6:08 pm PDT (01:08 UTC): no turbulence, a trace of icing, overcast from 9,000 ft to 13,500 ft, -10 °C. 139 nm along the route, 31 nm south 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
BCS1 at 3,700 ft, 17 nm north, 6:47 pm PDT (01:47 UTC): snow, rain, remarks: during the descent ils runway 12. 339 nm along the route, 17 nm north of the line.
as filed, and in English
```
MSO UA /OV MSO/TM 0147/FL037/TP BCS1/SK 037/WX SN RA/RM DURD ILS RY 12
```
Report
a routine report filed through MSO
Where
over MSO
Time
01:47 UTC
Height
at 3,700 ft
Aircraft
BCS1
Sky
at 3,700 ft
Weather
snow, rain
Remarks
during the descent ils runway 12
C25B at 4,100 ft, 17 nm north, 5:36 pm PDT (00:36 UTC): no icing, overcast above 4,100 ft, remarks: during the descent ils runway 12. 339 nm along the route, 17 nm north of the line.
as filed, and in English
```
MSO UA /OV MSO/TM 0036/FL041/TP C25B/SK OVC041/IC NEG/RM DURD ILS RY 12
```
Report
a routine report filed through MSO
Where
over MSO
Time
00:36 UTC
Height
at 4,100 ft
Aircraft
C25B
Sky
overcast from 4,100 ft
Icing
none
Remarks
during the descent ils runway 12
E75L descending, 23 nm south, 6:04 pm PDT (01:04 UTC): remarks: had the airport in sight at 400-500FT above ground. 468 nm along the route, 23 nm south of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 0104/FLDURD/TP E75L/RM HAD THE AIRPORT IN SIGHT AT 400-500FT AGL
```
Report
a routine report filed through BZN
Where
over BZN
Time
01:04 UTC
Height
during the descent
Aircraft
E75L
Remarks
had the airport in sight at 400-500FT above ground
B737 descending, 23 nm south, 5:28 pm PDT (00:28 UTC): scattered clouds above 8,000 ft, fog, snow, remarks: broke out about 100FT above mins. 468 nm along the route, 23 nm south of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 0028/FLDURD/TP B737/SK SCT080/WX 1/2SM SN FG/RM BROKE OUT ABOUT 100FT ABOVE MINS
```
Report
a routine report filed through BZN
Where
over BZN
Time
00:28 UTC
Height
during the descent
Aircraft
B737
Sky
scattered clouds from 8,000 ft
Weather
1/2SM, snow, fog
Remarks
broke out about 100FT above mins
A306 at 4,700 ft, 6 nm northeast, 5:51 pm PDT (00:51 UTC): a routine report with nothing remarked on. 568 nm along the route, 6 nm northeast of the line.
as filed, and in English
```
BIL UA /OV BIL280001/TM 0051/FL047/TP A306/SK BASE 047
```
Report
a routine report filed through BIL
Where
1 nm west (280°) of BIL
Time
00:51 UTC
Height
at 4,700 ft
Aircraft
A306
Sky
base 4,700 ft
BE20 at 15,000 ft, 35 nm southwest, 6:56 pm PDT (01:56 UTC): -5 °C, remarks: clear out at at 22,000 ft ZDVWC-31. 777 nm along the route, 35 nm southwest of the line.
as filed, and in English
```
CUT UA /OV ECS340020/TM 0156/FL150/TP BE20/TA M05/IC T RIME 150-180/RM CLR OUT AT 220 ZDVWC-31
```
Report
a routine report filed through CUT
Where
20 nm north (340°) of ECS
Time
01:56 UTC
Height
at 15,000 ft
Aircraft
BE20
Temperature
−5 °C
Icing
T rime from 15,000 ft to 18,000 ft
Remarks
clear out at at 22,000 ft ZDVWC-31
B763 at 32,000 ft, 13 nm southwest, 6:29 pm PDT (01:29 UTC): light to moderate clear-air turbulence, remarks: zdvwc. 917 nm along the route, 13 nm southwest of the line.
as filed, and in English
```
RAP UA /OV RAP084081/TM 0129/FL320/TP B763/TB OCNL LGT-MOD CAT/RM ZDVWC
```
Report
a routine report filed through RAP
Where
81 nm east (084°) of RAP
Time
01:29 UTC
Height
at 32,000 ft
Aircraft
B763
Turbulence
occasional light to moderate clear-air turbulence
Remarks
zdvwc
B38M at 23,700 ft, 7 nm southwest, 4:51 pm PDT (23:51 UTC): light turbulence. 1594 nm along the route, 7 nm southwest of the line.
as filed, and in English
```
IND UA /OV TTH190030/TM 2351/FL237/TP B38M/TB LGT
```
Report
a routine report filed through IND
Where
30 nm south (190°) of TTH
Time
23:51 UTC
Height
at 23,700 ft
Aircraft
B38M
Turbulence
light

8 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 23 forecast points nearest it (SEA, YKM, GEG, LWS, GPI, DLN, GTF, BIL, MLS, RAP, PIR, ONL, FSD, OMA, DSM, BRL, SPI, IND, LOU, TRI, RDU, FLO, ILM). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
3,500 ft	250° at 14 kt	−10 kt		130 kt	16 h 24 min	2:56 pm EDT (18:56 UTC)
5,500 ft	250° at 7 kt	−5 kt	10 °C	125 kt	17 h 03 min	3:35 pm EDT (19:35 UTC)
7,500 ft	270° at 7 kt	−6 kt	8 °C	126 kt	16 h 55 min	3:27 pm EDT (19:27 UTC)
9,500 ft	270° at 9 kt	−8 kt	5 °C	128 kt	16 h 39 min	3:11 pm EDT (19:11 UTC)
11,500 ft	260° at 11 kt	−9 kt	2 °C	129 kt	16 h 32 min	3:04 pm EDT (19:04 UTC)
13,500 ft	250° at 13 kt	−11 kt	-2 °C	131 kt	16 h 16 min	2:48 pm EDT (18:48 UTC)
15,500 ft	250° at 16 kt	−13 kt	-6 °C	133 kt	16 h 02 min	2:34 pm EDT (18:34 UTC)
17,500 ft	260° at 18 kt	−15 kt	-10 °C	135 kt	15 h 48 min	2:20 pm EDT (18:20 UTC)
18,000 ft FL180	260° at 18 kt	−15 kt	-11 °C	135 kt	15 h 48 min	2:20 pm EDT (18:20 UTC)
24,000 ft FL240	250° at 22 kt	−17 kt	-22 °C	137 kt	15 h 34 min	2:06 pm EDT (18:06 UTC)
30,000 ft FL300	250° at 29 kt	−23 kt	-35 °C	143 kt	14 h 55 min	1:27 pm EDT (17:27 UTC)
34,000 ft FL340	260° at 40 kt	−35 kt	-40 °C	155 kt	13 h 45 min	12:17 pm EDT (16:17 UTC)
39,000 ft FL390	260° at 43 kt	−39 kt	-47 °C	159 kt	13 h 25 min	11:57 am EDT (15:57 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; 45 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°
GEG	used from 149 nm out; 38 nm from the line		080/16 -2°	050/17 -7°	080/9 -10°	190/33 -21°	180/31 -32°	L/V -35°	L/V -37°	270/8 -40°
LWS	used from 199 nm out; 36 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°
GPI	used from 299 nm out; 99 nm from the line		070/19 -5°	100/16 -7°	080/10 -8°	130/8 -19°	170/37 -28°	200/50 -40°	210/43 -40°	220/41 -42°
DLN	used from 349 nm out; 81 nm from the line			090/6 -6°	240/22 -4°	210/34 -16°	210/62 -25°	210/66 -34°	210/82 -36°	220/77 -42°
GTF	used from 448 nm out; 82 nm from the line		070/11	080/15 -7°	110/19 -9°	190/25 -14°	200/34 -23°	200/54 -39°	220/66 -40°	220/77 -44°
BIL	used from 498 nm out; 53 nm from the line		080/13	180/9 -2°	210/38 0°	220/51 -11°	210/46 -22°	210/58 -35°	230/73 -39°	230/72 -45°
MLS	used from 648 nm out; 72 nm from the line		150/23 2°	190/29 4°	210/44 2°	220/32 -10°	210/36 -21°	200/48 -37°	230/63 -40°	240/71 -47°
RAP	used from 747 nm out; 63 nm from the line		180/23 12°	200/38 13°	210/38 6°	220/28 -10°	230/34 -21°	230/37 -36°	250/52 -38°	250/59 -46°
PIR	used from 897 nm out; 37 nm from the line		170/22 19°	190/25 13°	210/32 6°	240/23 -9°	250/32 -21°	250/38 -36°	260/44 -40°	260/52 -47°
ONL	used from 996 nm out; 51 nm from the line		210/31 20°	230/27 13°	230/18 7°	220/19 -8°	240/26 -20°	250/44 -35°	270/52 -39°	260/57 -47°
FSD	used from 1046 nm out; 54 nm from the line	190/9	230/30 18°	240/23 13°	240/20 6°	260/22 -9°	250/31 -21°	250/43 -36°	260/49 -43°	270/53 -47°
OMA	used from 1146 nm out; 63 nm from the line	220/47	240/33 19°	250/18 11°	230/17 6°	260/29 -8°	250/33 -19°	250/51 -33°	260/61 -40°	270/62 -49°
DSM	used from 1195 nm out; 49 nm from the line	230/40	250/33 17°	250/18 12°	240/17 5°	260/28 -8°	270/34 -19°	260/41 -33°	260/55 -41°	270/62 -51°
BRL	used from 1345 nm out; 23 nm from the line	230/24	240/29 15°	290/16 10°	280/15 4°	260/23 -7°	260/32 -19°	260/36 -33°	280/48 -41°	280/59 -52°
SPI	used from 1444 nm out; 17 nm from the line	220/21	250/23 16°	260/27 9°	270/14 6°	270/23 -7°	270/31 -19°	270/28 -33°	290/48 -42°	300/55 -52°
IND	used from 1544 nm out; 73 nm from the line	290/16	310/20 16°	320/21 10°	330/13 3°	300/25 -7°	320/32 -19°	330/46 -34°	320/61 -43°	320/63 -50°
LOU	used from 1644 nm out; 20 nm from the line	310/18	340/28 16°	340/29 10°	350/27 3°	330/27 -7°	340/39 -19°	330/58 -33°	330/67 -41°	330/40 -49°
TRI	used from 1793 nm out; 59 nm from the line		330/22 11°	330/29 7°	330/32 3°	330/36 -8°	320/34 -19°	320/36 -34°	320/43 -39°	320/46 -47°
RDU	used from 1943 nm out; 91 nm from the line	280/33	300/23 11°	300/28 8°	290/28 4°	260/41 -6°	240/52 -18°	230/66 -31°	230/76 -39°	240/52 -49°
FLO	used from 2042 nm out; 56 nm from the line	300/16	320/14 12°	320/19 7°	290/26 5°	260/39 -6°	250/45 -18°	230/62 -32°	230/83 -40°	230/64 -51°
ILM	used from 2092 nm out; 20 nm from the line	270/22	270/23 11°	260/35 10°	240/41 6°	240/49 -5°	240/61 -16°	230/74 -30°	220/79 -40°	230/71 -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
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)
MWH Moses Lake, WA	120 nm out, 3 nm east of the line, tower	VFR Sky: a broken layer at 9,000 feet, overcast at 11,000 feet	from the east (080°) at 4 knots	10+ mi	9,000 ft	1,188 ft	01:52 UTC
MSO Missoula, MT	339 nm out, 17 nm north of the line, tower	marginal VFR Sky: overcast at 2,300 feet Weather: light snow, mist	calm	6 mi	2,300 ft	3,205 ft	01:53 UTC
BIL Billings, MT	578 nm out, 6 nm north of the line, tower	IFR Sky: a broken layer at 800 feet, overcast at 1,200 feet Weather: light rain, light snow, mist	from the north (010°) at 13 knots	5 mi	800 ft	3,662 ft	01:53 UTC
EFC Belle Fourche, SD	787 nm out, 4 nm northwest of the line	no report just now				3,190 ft
PHP Philip, SD	887 nm out, 5 nm south of the line	marginal VFR Sky: scattered clouds at 700 feet, overcast at 1,500 feet Weather: light rain, mist	calm	5 mi	1,500 ft	2,209 ft	02:02 UTC
DSM Des Moines, IA	1265 nm out, 8 nm south of the line, tower	VFR Sky: a broken layer at 25,000 feet	from the south (180°) at 11 knots	10+ mi	25,000 ft	957 ft	01:54 UTC
SPI Springfield, IL	1474 nm out, 15 nm south of the line, tower	VFR	from the south (180°) at 7 knots	10+ mi	none	597 ft	01:52 UTC
DEC Decatur, IL	1514 nm out, 5 nm northwest of the line, tower	VFR	from the south (190°) at 4 knots	9 mi	none	681 ft	01:54 UTC
LEX Lexington, KY	1733 nm out, 10 nm northeast of the line, tower	marginal VFR Sky: a few clouds at 800 feet, overcast at 1,800 feet Weather: mist	from the west (270°) at 4 knots	5 mi	1,800 ft	979 ft	01:54 UTC
VUJ Albemarle, NC	2002 nm out, 7 nm southwest of the line, tower	VFR Sky: scattered clouds at 8,000 feet	from the south-southwest (210°) at 6 knots	10+ mi	none	609 ft	02:15 UTC
ILM Wilmington, NC	destination	VFR	from the west-southwest (250°) at 11 knots	10+ mi	none	31 ft	9:53 pm EDT (01:53 UTC)

The highest airport on this list sits at 3,662 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At ILM when you get there the forecast at the estimated arrival, 11:57 am EDT (15:57 UTC)

Wind from the west-northwest at 12 knots, gusting to 18, visibility more than 6 miles, a broken layer at 4,000 feet VFR

The whole forecast for ILM

From Sun 8:00 pm EDT (00:00 UTC): wind from the southwest at 12 knots, visibility more than 6 miles, scattered clouds at 3,500 feet
From Mon 4:00 am EDT (08:00 UTC): wind from the west at 8 knots, visibility more than 6 miles, a few clouds at 4,500 feet
From Mon 11:00 am EDT (15:00 UTC): wind from the west-northwest at 12 knots, gusting to 18, visibility more than 6 miles, a broken layer at 4,000 feet
From Mon 5:00 pm EDT (21:00 UTC): wind from the north-northwest at 8 knots, visibility more than 6 miles, scattered clouds at 4,000 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

6/8713 Maxton, NC, Friday, October 16, 2026 through Sunday, October 18, 2026 UTC 11 nm from the route, at the destination end · air shows/sports · starts Friday 16 October · ZDC
6/8508 Johnsontown, NC 1 nm from the route, at the destination end · security · ZDC

Daylight

Sunset at SEA 6:27 pm PDT (01:27 UTC), at ILM 6:41 pm EDT (22:41 UTC) (civil twilight ends 7:06 pm EDT (23:06 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 upper Mississippi valley · 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, Wilmington International.