Plan a flight · Sun 8:34 pm PDT (03:34 UTC)

Portland International to Ronald Reagan Washington Ntl Airport PDX → DCA

2,037 nautical miles (2,345 statute miles) east on a straight line, true course 085°, about 069° magnetic at the departure end (variation 16E). At 120 knots that is 12 h 30 min at the quickest height in today's winds (39,000 ft, a 43-knot tailwind), arriving about 12:04 pm EDT (16:04 UTC). Right now PDX is VFR, wind from the east (100°) at 4 knots; DCA is IFR, wind from the north-northeast (020°) at 7 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: 720 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 1C: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 40 knots, until 9:55 pm PDT (04:55 UTC). Over the route from 719 to 809 nm out.

as issued

WSUS32 KKCI 120255
MKCC WST 120255
CONVECTIVE SIGMET 1C
VALID UNTIL 0455Z
SD ND MT WY
FROM 30WSW DIK-50NW DPR-60WNW RAP-50ENE SHR-30WSW DIK
AREA TS MOV FROM 22040KT. TOPS TO FL300.

SIGMET E11E: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 20 knots, until 9:55 pm PDT (04:55 UTC). Over the last 100 nm of the route.

as issued

WSUS31 KKCI 120255
MKCE WST 120255
CONVECTIVE SIGMET 11E
VALID UNTIL 0455Z
NY NJ PA DE MD VA DC WV AND DE NJ NY MD CT VA CSTL WTRS
FROM 20NE JFK-90SE SIE-20NNW ORF-30ENE EKN-10S JST-20NE JFK
AREA EMBD TS MOV FROM 24020KT. TOPS TO FL340.

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 150 nm of the route.
AIRMET ZULU 2C: moderate icing up to 20,000 ft. Over the route from 60 to 529 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 180 to 599 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 250 to 459 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 370 to 949 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 549 to 629 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, 609 nm along the route.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Near the route, 749 nm along the route.
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 1029 to 1089 nm out.
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). Near the route, 1228 nm along the route.
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 last 479 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 180 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1858 to 1987 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 PDX.

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

EPIC at 31,000 ft, 49 nm northwest, 6:38 pm PDT (01:38 UTC): moderate turbulence from 30,000 ft to 31,000 ft, remarks: zse. At the departure end, 49 nm northwest of the line.
as filed, and in English
```
AST UA /OV AST070020/TM 0138/FL310/TP EPIC/TB MOD 310-300/RM ZSE
```
Report
a routine report filed through AST
Where
20 nm east (070°) of AST
Time
01:38 UTC
Height
at 31,000 ft
Aircraft
EPIC
Turbulence
moderate from 31,000 ft to 30,000 ft
Remarks
zse
B739 at 10,000 ft, 30 nm west, 6:19 pm PDT (01:19 UTC): moderate rime icing from 10,000 ft to 12,000 ft, -12 °C. At the departure end, 30 nm west of the line.
as filed, and in English
```
PDX UA /OV 30W PDX/TM 0119/FL100/TP B739/TA M12/IC MOD RIME 120-100
```
Report
a routine report filed through PDX
Where
30W pdx
Time
01:19 UTC
Height
at 10,000 ft
Aircraft
B739
Temperature
−12 °C
Icing
moderate rime from 12,000 ft to 10,000 ft
A320 at 33,000 ft, 39 nm north, 5:36 pm PDT (00:36 UTC): moderate turbulence above 33,000 ft, remarks: zob. 1618 nm along the route, 39 nm north of the line.
as filed, and in English
```
JXN UA /OV JXN280030/TM 0036/FL330/TP A320/TB OCNL MOD 330/RM ZOB
```
Report
a routine report filed through JXN
Where
30 nm west (280°) of JXN
Time
00:36 UTC
Height
at 33,000 ft
Aircraft
A320
Turbulence
occasional moderate at 33,000 ft
Remarks
zob
A320 at 34,000 ft, 34 nm south, 7:03 pm PDT (02:03 UTC): moderate chop turbulence. 1678 nm along the route, 34 nm south of the line.
as filed, and in English
```
FWA UA /OV FWA115040/TM 0203/FL340/TP A320/TB MOD CHOP
```
Report
a routine report filed through FWA
Where
40 nm southeast (115°) of FWA
Time
02:03 UTC
Height
at 34,000 ft
Aircraft
A320
Turbulence
moderate chop
B38M at 29,000 ft, 11 nm south, 5:55 pm PDT (00:55 UTC): moderate turbulence above 29,000 ft, remarks: zob. 1878 nm along the route, 11 nm south of the line.
as filed, and in English
```
MPG UA /OV AIR120030/TM 0055/FL290/TP B38M /TB OCNL MOD 290/RM ZOB
```
Report
a routine report filed through MPG
Where
30 nm southeast (120°) of AIR
Time
00:55 UTC
Height
at 29,000 ft
Aircraft
B38M
Turbulence
occasional moderate at 29,000 ft
Remarks
zob
B38M at 20,000 ft, 6 nm southwest, 8:11 pm PDT (03:11 UTC): moderate clear-air turbulence from 20,000 ft to 25,000 ft. At the destination end, 6 nm southwest of the line.
as filed, and in English
```
IAD UA /OV AML300020/TM 0311/FL200/TP B38M/TB MOD CAT 200-250
```
Report
a routine report filed through IAD
Where
20 nm northwest (300°) of AML
Time
03:11 UTC
Height
at 20,000 ft
Aircraft
B38M
Turbulence
moderate clear-air turbulence from 20,000 ft to 25,000 ft
C337 at 12,000 ft, 32 nm north, 6:18 pm PDT (01:18 UTC): light rime icing, -12 °C, remarks: zse. 90 nm along the route, 32 nm north 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, 7 nm north, 5:56 pm PDT (00:56 UTC): overcast above 6,000 ft. 170 nm along the route, 7 nm north 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
E75L descending, 3 nm north, 6:04 pm PDT (01:04 UTC): remarks: had the airport in sight at 400-500FT above ground. 479 nm along the route, 3 nm north 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
A306 at 4,700 ft, 14 nm north, 5:51 pm PDT (00:51 UTC): a routine report with nothing remarked on. 589 nm along the route, 14 nm north 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
A321 at 32,000 ft, 45 nm south, 6:56 pm PDT (01:56 UTC): light turbulence, remarks: pocket continuous light turbulence. 1438 nm along the route, 45 nm south of the line.
as filed, and in English
```
RPJ UA /OV PLL/TM 0156/FL320/TP A321/TB CONS LGT/RM POCKET CONS LGT TB
```
Report
a routine report filed through RPJ
Where
over PLL
Time
01:56 UTC
Height
at 32,000 ft
Aircraft
A321
Turbulence
continuous light
Remarks
pocket continuous light turbulence
E295 at 37,000 ft, 38 nm north, 5:53 pm PDT (00:53 UTC): light chop turbulence. 1468 nm along the route, 38 nm north of the line.
as filed, and in English
```
UES UA /OV BAE/TM 0053/FL370/TP E295/TB OCNL LGT CHOP
```
Report
a routine report filed through UES
Where
over BAE
Time
00:53 UTC
Height
at 37,000 ft
Aircraft
E295
Turbulence
occasional light chop
PA44 descending, 22 nm north, 7:27 pm PDT (02:27 UTC): a broken layer from 900 ft to 1,500 ft; a broken layer from 2,600 ft to 3,500 ft, fog. 1688 nm along the route, 22 nm north of the line.
as filed, and in English
```
TOL UA /OV TOL/TM 0227/FLDURD/TP PA44/SK BKN009 TOPS015 BKN026 TOPS035/WX FG
```
Report
a routine report filed through TOL
Where
over TOL
Time
02:27 UTC
Height
during the descent
Aircraft
PA44
Sky
BKN009 TOPS015 BKN026 TOPS035
Weather
fog
C525 descending, 22 nm north, 6:41 pm PDT (01:41 UTC): a routine report with nothing remarked on. 1688 nm along the route, 22 nm north of the line.
as filed, and in English
```
TOL UA /OV TOL/TM 0141/FLDURD/TP C525/SK TOPS035 BKN010/WX 2SM
```
Report
a routine report filed through TOL
Where
over TOL
Time
01:41 UTC
Height
during the descent
Aircraft
C525
Sky
TOPS035 BKN010
Weather
2SM

7 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 21 forecast points nearest it (PDX, YKM, LWS, DLN, BIL, MLS, RAP, PIR, ABR, FSD, MCW, LSE, DBQ, JOT, MKG, FWA, CMH, CLE, AGC, EKN, RIC). 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	260° at 8 kt	−7 kt		127 kt	16 h 02 min	3:36 pm EDT (19:36 UTC)
5,500 ft	240° at 6 kt	−5 kt	11 °C	125 kt	16 h 18 min	3:52 pm EDT (19:52 UTC)
7,500 ft	250° at 6 kt	−5 kt	8 °C	125 kt	16 h 18 min	3:52 pm EDT (19:52 UTC)
9,500 ft	250° at 7 kt	−6 kt	4 °C	126 kt	16 h 10 min	3:44 pm EDT (19:44 UTC)
11,500 ft	240° at 11 kt	−9 kt	2 °C	129 kt	15 h 47 min	3:21 pm EDT (19:21 UTC)
13,500 ft	250° at 13 kt	−11 kt	-2 °C	131 kt	15 h 33 min	3:07 pm EDT (19:07 UTC)
15,500 ft	250° at 14 kt	−13 kt	-6 °C	133 kt	15 h 19 min	2:53 pm EDT (18:53 UTC)
17,500 ft	250° at 15 kt	−14 kt	-11 °C	134 kt	15 h 12 min	2:46 pm EDT (18:46 UTC)
18,000 ft FL180	250° at 16 kt	−15 kt	-12 °C	135 kt	15 h 05 min	2:39 pm EDT (18:39 UTC)
24,000 ft FL240	260° at 19 kt	−18 kt	-23 °C	138 kt	14 h 46 min	2:20 pm EDT (18:20 UTC)
30,000 ft FL300	260° at 25 kt	−25 kt	-35 °C	145 kt	14 h 03 min	1:37 pm EDT (17:37 UTC)
34,000 ft FL340	260° at 37 kt	−37 kt	-40 °C	157 kt	12 h 58 min	12:32 pm EDT (16:32 UTC)
39,000 ft FL390	270° at 42 kt	−43 kt	-46 °C	163 kt	12 h 30 min	12:04 pm EDT (16:04 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
PDX	used from 0 nm out; 25 nm from the line	L/V	030/7 1°	020/12 -6°	020/29 -9°	010/69 -16°	010/81 -25°	360/83 -40°	360/67 -46°	320/29 -42°
YKM	used from 50 nm out; 54 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; 69 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°
DLN	used from 350 nm out; 57 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°
BIL	used from 499 nm out; 65 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 649 nm out; 64 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 749 nm out; 87 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 899 nm out; 33 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°
ABR	used from 999 nm out; 56 nm from the line	070/14	250/10 17°	270/16 11°	260/28 5°	260/36 -10°	260/41 -22°	270/33 -37°	260/42 -42°	260/50 -48°
FSD	used from 1049 nm out; 51 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°
MCW	used from 1198 nm out; 43 nm from the line	220/44	250/30 17°	230/14 12°	240/17 6°	250/22 -8°	270/29 -20°	250/34 -34°	260/52 -43°	260/59 -51°
LSE	used from 1298 nm out; 42 nm from the line	230/40	240/24 17°	240/13 10°	250/13 6°	280/22 -9°	250/28 -21°	250/41 -34°	260/42 -44°	270/62 -53°
DBQ	used from 1348 nm out; 37 nm from the line	230/33	250/30 16°	280/15 9°	260/15 5°	260/21 -7°	260/24 -20°	250/37 -33°	270/42 -43°	280/63 -52°
JOT	used from 1448 nm out; 60 nm from the line	250/23	270/22 15°	250/16 10°	240/9 4°	280/22 -7°	280/29 -19°	300/29 -34°	290/50 -43°	300/64 -52°
MKG	used from 1548 nm out; 74 nm from the line	260/22	290/16 15°	300/11 10°	290/5 3°	300/26 -9°	300/32 -20°	320/48 -36°	320/61 -45°	310/74 -53°
FWA	used from 1598 nm out; 40 nm from the line	300/17	320/20 16°	330/20 10°	340/15 3°	310/27 -8°	320/37 -20°	330/52 -36°	330/65 -43°	330/60 -50°
CMH	used from 1698 nm out; 64 nm from the line	330/15	340/22 14°	340/24 9°	340/23 4°	340/35 -9°	340/49 -20°	340/58 -37°	330/70 -42°	340/55 -47°
CLE	used from 1748 nm out; 46 nm from the line	340/7	010/16 13°	350/18 8°	350/20 3°	340/31 -10°	340/46 -21°	340/54 -37°	330/62 -44°	340/65 -49°
AGC	used from 1798 nm out; 60 nm from the line	350/14	330/20 11°	340/18 8°	330/17 3°	340/22 -11°	340/31 -22°	330/33 -36°	300/34 -41°	300/35 -47°
EKN	used from 1947 nm out; 78 nm from the line		330/21 12°	330/25 7°	350/22 2°	330/24 -10°	310/27 -21°	320/33 -35°	290/31 -39°	290/34 -47°
RIC	used from 1997 nm out; 90 nm from the line	270/23	280/19 11°	270/18 8°	240/22 4°	230/39 -7°	220/55 -18°	220/75 -30°	230/83 -39°	230/64 -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
PDX Portland, OR	departure	VFR Sky: a few clouds at 5,000 feet, a few clouds at 7,000 feet, a broken layer at 10,000 feet	from the east (100°) at 4 knots	10+ mi	10,000 ft	30 ft	7:53 pm PDT (02:53 UTC)
PDT Pendleton, OR	160 nm out, 4 nm southwest of the line, tower	VFR Sky: a broken layer at 6,500 feet, overcast at 8,000 feet	from the southwest (220°) at 3 knots	10+ mi	6,500 ft	1,494 ft	02:53 UTC
GIC Grangeville, ID	270 nm out, 8 nm north of the line	VFR Sky: overcast at 3,300 feet	from the north-northwest (330°) at 5 knots	10+ mi	3,300 ft	3,313 ft	03:15 UTC
BZN Bozeman, MT	479 nm out, 3 nm north of the line, tower	low IFR Sky: a broken layer at 200 feet, overcast at 800 feet Weather: light snow, mist	calm	1.25 mi	200 ft	4,473 ft	03:26 UTC
MKA Miller, SD	999 nm out, 5 nm south of the line	no report just now				1,569 ft
MWM Windom, MN	1168 nm out, 3 nm southeast of the line	VFR	from the north-northwest (340°) at 4 knots	10+ mi	none	1,410 ft	03:21 UTC
MRJ Mineral Point, WI	1388 nm out, 4 nm southeast of the line	no report just now				1,170 ft
JVL Janesville, WI	1448 nm out, 2 nm southwest of the line, tower	VFR	calm	10+ mi	none	807 ft	03:15 UTC
MFD Mansfield, OH	1758 nm out, 2 nm northeast of the line, tower	low IFR Sky: overcast at 300 feet Weather: mist	from the northwest (310°) at 3 knots	6 mi	300 ft	1,297 ft	02:52 UTC
JYO Leesburg, VA	2007 nm out, 3 nm east of the line, tower	IFR Sky: overcast at 600 feet	from the north (350°) at 8 knots	10+ mi	600 ft	389 ft	03:15 UTC
DCA Washington, DC	destination	IFR Sky: overcast at 500 feet Weather: light drizzle, mist	from the north-northeast (020°) at 7 knots	5 mi	500 ft	14 ft	10:52 pm EDT (02:52 UTC)

The highest airport on this list sits at 4,473 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At DCA when you get there the forecast at the estimated arrival, 12:04 pm EDT (16:04 UTC)

Wind from the north-northwest at 13 knots, gusting to 22, visibility more than 6 miles, a broken layer at 1,500 feet, overcast at 2,500 feet marginal VFR

The whole forecast for DCA

From Sun 11:00 pm EDT (03:00 UTC): wind from the north-northeast at 7 knots, visibility 5 miles, light rain showers, mist, overcast at 500 feet
From Mon 1:00 am EDT (05:00 UTC): wind from the north at 7 knots, visibility 4 miles, light rain showers, mist, overcast at 800 feet
From Mon 6:00 am EDT (10:00 UTC): wind from the north-northwest at 10 knots, gusting to 18, visibility more than 6 miles, overcast at 1,200 feet
From Mon 11:00 am EDT (15:00 UTC): wind from the north-northwest at 13 knots, gusting to 22, visibility more than 6 miles, a broken layer at 1,500 feet, overcast at 2,500 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the north-northwest at 10 knots, gusting to 17, visibility more than 6 miles, a broken layer at 3,500 feet
From Mon 7:00 pm EDT (23:00 UTC): wind from the northwest at 6 knots, visibility more than 6 miles, a few clouds at 5,000 feet, scattered clouds at 25,000 feet

The forecast for PDX, the departure

From Sun 8:00 pm PDT (03:00 UTC): wind from the east at 5 knots, visibility more than 6 miles, scattered clouds at 5,000 feet

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

6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 22 nm from the route, 1828 nm along the route · a VIP movement · today · ZOB
6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 22 nm from the route, 1828 nm along the route · a VIP movement · today · ZOB
6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local 1 nm from the route, at the destination end · a VIP movement · today · ZDC
4/9383 WASHINGTON, DC., USA on the route, at the destination end · security · ZDC

Daylight

Sunset at PDX 6:30 pm PDT (01:30 UTC), at DCA 6:34 pm EDT (22:34 UTC) (civil twilight ends 7:01 pm EDT (23:01 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: Portland International, Ronald Reagan Washington Ntl Airport.