Plan a flight · Sun 8:29 pm EDT (00:29 UTC)

Philadelphia International to Boeing Fld/King County International PHL → BFI

2,061 nautical miles (2,371 statute miles) northwest on a straight line, true course 299°, about 311° magnetic at the departure end (variation 12W). At 120 knots that is 16 h 45 min at the quickest height in today's winds (4,500 ft, a 3-knot tailwind), arriving about 10:14 am PDT (17:14 UTC). Right now PHL is IFR, wind from the northeast (040°) at 9 knots; BFI is VFR, wind variable at 6 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: 3 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 E16E: thunderstorms (a convective SIGMET) up to 32,000 ft, moving from the southwest at 25 knots, until 9:55 pm EDT (01:55 UTC). Over the first 50 nm of the route.

as issued

WSUS31 KKCI 112355
MKCE WST 112355
CONVECTIVE SIGMET 16E
VALID UNTIL 0155Z
NY NJ PA DE MD VA DC WV AND NJ NY CSTL WTRS
FROM SAX-30SE JFK-10N DCA-60ENE EKN-SAX
AREA EMBD TS MOV FROM 22025KT. TOPS TO FL320.

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 first 199 nm of the route.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 169 nm of the route.
AIRMET TANGO 2W: 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 20 to 169 nm out.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the route from 50 to 259 nm out.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 80 to 219 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 368 to 418 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 986 to 1025 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 1224 to 1792 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1294 to 1792 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1533 to 1852 nm out.
AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the route from 1702 to 1941 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 25,000 ft to 39,000 ft. Over the last 0 nm of the route.

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 PHL.

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

B38M at 25,000 ft, 15 nm northeast, 6:25 pm EDT (22:25 UTC): moderate turbulence. At the departure end, 15 nm northeast of the line.
as filed, and in English
```
TEB UA /OV 3958N 07457W/TM 2225/FL250/TP B38M/TB MOD
```
Report
a routine report filed through TEB
Where
3958N 07457W
Time
22:25 UTC
Height
at 25,000 ft
Aircraft
B38M
Turbulence
moderate
C25B at 25,000 ft, 4 nm southwest, 5:47 pm EDT (21:47 UTC): moderate rime icing, 0 °C. 139 nm along the route, 4 nm southwest of the line.
as filed, and in English
```
PSB UA /OV PSB/TM 2147/FL250/TP C25B/TA 0/IC MOD RIME
```
Report
a routine report filed through PSB
Where
over PSB
Time
21:47 UTC
Height
at 25,000 ft
Aircraft
C25B
Temperature
0 °C
Icing
moderate rime
A321 climbing, 0 nm northwest, 8:20 pm EDT (00:20 UTC): light chop turbulence, sandstorm. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
PHL UA /OV E NE PHL/TM 0020/FLDURC/TP A321/WV LOSS 15KT AT 015 /TB LGT CHOP
```
Report
a routine report filed through PHL
Where
east northeast phl
Time
00:20 UTC
Height
during the climb
Aircraft
A321
Wind
loss 15 knots at at 1,500 ft
Turbulence
light chop
BCS3 at 1,800 ft, 40 nm southeast, 8:00 pm EDT (00:00 UTC): remarks: tops 1,800 ft during the climb. At the departure end, 40 nm southeast of the line.
as filed, and in English
```
ACY UA /OV ACY/TM 0000/FL018/TP BCS3/RM TOPS 018 DURC
```
Report
a routine report filed through ACY
Where
over ACY
Time
00:00 UTC
Height
at 1,800 ft
Aircraft
BCS3
Remarks
tops 1,800 ft during the climb
PC24 at 900 ft, 14 nm northeast, 7:25 pm EDT (23:25 UTC): remarks: reported bases 900 ft during the descent RY6. At the departure end, 14 nm northeast of the line.
as filed, and in English
```
PNE UA /OV PNE240002/TM 2325/FL009/TP PC24/RM RPTD BASES 009 DURD RY6
```
Report
a routine report filed through PNE
Where
2 nm southwest (240°) of PNE
Time
23:25 UTC
Height
at 900 ft
Aircraft
PC24
Remarks
reported bases 900 ft during the descent RY6
BCS3 at 300 ft, 40 nm southeast, 6:58 pm EDT (22:58 UTC): overcast above 30,000 ft, remarks: bases 300 ft during the climb. At the departure end, 40 nm southeast of the line.
as filed, and in English
```
ACY UA /OV ACY/TM 2258/FL003/TP BCS3/SK OVC003/RM BASES 003 DURC
```
Report
a routine report filed through ACY
Where
over ACY
Time
22:58 UTC
Height
at 300 ft
Aircraft
BCS3
Sky
overcast from 300 ft
Remarks
bases 300 ft during the climb
B189 descending, 14 nm northeast, 6:57 pm EDT (22:57 UTC): overcast above 800 ft. At the departure end, 14 nm northeast of the line.
as filed, and in English
```
PNE UA /OV PNE240002/TM 2257/FLDURD/TP B189/SK OVC008
```
Report
a routine report filed through PNE
Where
2 nm southwest (240°) of PNE
Time
22:57 UTC
Height
during the descent
Aircraft
B189
Sky
overcast from 800 ft
C68A descending, 14 nm northeast, 6:28 pm EDT (22:28 UTC): overcast above 700 ft. At the departure end, 14 nm northeast of the line.
as filed, and in English
```
PNE UA /OV PNE240002/TM 2228/FLDURD/TP C68A/SK OVC007
```
Report
a routine report filed through PNE
Where
2 nm southwest (240°) of PNE
Time
22:28 UTC
Height
during the descent
Aircraft
C68A
Sky
overcast from 700 ft
A320 at 800 ft, 0 nm northwest, 6:25 pm EDT (22:25 UTC): overcast above 800 ft. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
PHL UA /OV PHL/TM 2225/FL008/TP A320/SK OVC008
```
Report
a routine report filed through PHL
Where
over PHL
Time
22:25 UTC
Height
at 800 ft
Aircraft
A320
Sky
overcast from 800 ft
A319 at 10,000 ft, 8 nm northeast, 7:01 pm EDT (23:01 UTC): no turbulence, vmc, 8 °C, wind 230° at 30 knots. At the departure end, 8 nm northeast of the line.
as filed, and in English
```
PHL UA /OV 10 N PHL/TM 2301/FL100/TP A319/SK VMC/TA 8/WV 23030KT/TB SMOOTH
```
Report
a routine report filed through PHL
Where
10 north phl
Time
23:01 UTC
Height
at 10,000 ft
Aircraft
A319
Sky
visual conditions
Temperature
8 °C
Wind
from 230° at 30 knots
Turbulence
smooth
C700 climbing, 18 nm southwest, 6:29 pm EDT (22:29 UTC): overcast above 500 ft, remarks: departing runway 09. At the departure end, 18 nm southwest of the line.
as filed, and in English
```
ILG UA /OV ILG/TM 2229/FLDURC/TP C700/SK OVC 005/RM DEPARTING RWY 09
```
Report
a routine report filed through ILG
Where
over ILG
Time
22:29 UTC
Height
during the climb
Aircraft
C700
Sky
overcast from 500 ft
Remarks
departing runway 09
C680 at 1,400 ft, 10 nm north, 7:20 pm EDT (23:20 UTC): a broken layer above 1,400 ft, remarks: reported 30 knots crosswind until at 40,000 ft feet above ground, wind calm below 40,000 ft feet above ground final runway 36. At the departure end, 10 nm north of the line.
as filed, and in English
```
RDG UA /OV 2 S RDG/TM 2320/FL014/TP C680/SK BKN014/RM REPORTED 30KT CROSSWIND UNTIL 400 FEET AGL, WIND CALM BELOW 400 FEET AGL. FNL RWY 36
```
Report
a routine report filed through RDG
Where
2 south rdg
Time
23:20 UTC
Height
at 1,400 ft
Aircraft
C680
Sky
a broken layer from 1,400 ft
Remarks
reported 30 knots crosswind until at 40,000 ft feet above ground, wind calm below 40,000 ft feet above ground final runway 36
P28R at 1,000 ft, 10 nm southwest, 7:31 pm EDT (23:31 UTC): a broken layer above 1,000 ft. At the departure end, 10 nm southwest of the line.
as filed, and in English
```
MDT UA /OV LRP/TM 2331/FL010/TP P28R/SK BKN010
```
Report
a routine report filed through MDT
Where
over LRP
Time
23:31 UTC
Height
at 1,000 ft
Aircraft
P28R
Sky
a broken layer from 1,000 ft
P28R at 1,000 ft, 10 nm southwest, 6:30 pm EDT (22:30 UTC): a broken layer above 1,000 ft, remarks: during the descent runway 08 lns. At the departure end, 10 nm southwest of the line.
as filed, and in English
```
LNS UA /OV LNS/TM 2230/FL010/TP P28R/SK BKN010-TOPSUNKN/RM DURD RY 08 LNS
```
Report
a routine report filed through LNS
Where
over LNS
Time
22:30 UTC
Height
at 1,000 ft
Aircraft
P28R
Sky
a broken layer from 1,000 ft, tops unknown
Remarks
during the descent runway 08 lns

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 westbound cruising heights for this course (VFR: even thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 19 forecast points nearest it (ACY, AVP, PSB, AGC, CLE, MKG, GRB, LSE, MSP, AXN, ABR, DIK, MLS, GGW, GTF, GPI, GEG, YKM, SEA). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
4,500 ft	110° at 2 kt	−3 kt	3 °C	123 kt	16 h 45 min	10:14 am PDT (17:14 UTC)
6,500 ft	240° at 1 kt	0	9 °C	120 kt	17 h 10 min	10:39 am PDT (17:39 UTC)
8,500 ft	240° at 4 kt	+2 kt	6 °C	118 kt	17 h 28 min	10:57 am PDT (17:57 UTC)
10,500 ft	240° at 7 kt	+5 kt	2 °C	115 kt	17 h 55 min	11:24 am PDT (18:24 UTC)
12,500 ft	250° at 10 kt	+8 kt	-1 °C	112 kt	18 h 24 min	11:53 am PDT (18:53 UTC)
14,500 ft	240° at 13 kt	+10 kt	-5 °C	110 kt	18 h 44 min	12:13 pm PDT (19:13 UTC)
16,500 ft	240° at 16 kt	+13 kt	-9 °C	107 kt	19 h 16 min	12:45 pm PDT (19:45 UTC)
18,000 ft FL180	240° at 19 kt	+14 kt	-12 °C	106 kt	19 h 27 min	12:56 pm PDT (19:56 UTC)
24,000 ft FL240	250° at 25 kt	+21 kt	-23 °C	99 kt	20 h 49 min	2:18 pm PDT (21:18 UTC)
30,000 ft FL300	250° at 36 kt	+31 kt	-36 °C	89 kt	23 h 09 min	4:38 pm PDT (23:38 UTC)
34,000 ft FL340	250° at 43 kt	+37 kt	-43 °C	83 kt	24 h 50 min	6:19 pm PDT (01:19 UTC)
39,000 ft FL390	260° at 53 kt	+48 kt	-49 °C	72 kt	28 h 38 min	10:07 pm PDT (05:07 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
ACY	used from 0 nm out; 64 nm from the line	230/15	230/22 15°	230/31 11°	230/27 6°	230/40 -7°	230/51 -17°	230/71 -31°	230/81 -41°	230/86 -53°
AVP	used from 50 nm out; 68 nm from the line	110/36	190/34 13°	230/11 8°	230/16 4°	230/26 -8°	220/40 -19°	230/73 -33°	230/98 -41°	230/87 -51°
PSB	used from 100 nm out; 20 nm from the line		260/13 13°	220/12 8°	220/11 4°	230/27 -11°	210/31 -21°	220/73 -32°	220/75 -40°	230/66 -50°
AGC	used from 199 nm out; 75 nm from the line	140/12	350/10 12°	L/V 9°	L/V 3°	200/11 -11°	220/21 -22°	220/47 -33°	230/51 -39°	230/45 -48°
CLE	used from 249 nm out; 64 nm from the line	340/5	320/13 14°	300/12 8°	310/10 2°	310/14 -10°	340/14 -23°	320/27 -35°	260/28 -40°	250/36 -48°
MKG	used from 398 nm out; 112 nm from the line	250/5	320/10 15°	310/19 9°	320/21 3°	310/23 -10°	330/37 -22°	330/51 -38°	320/44 -47°	300/60 -49°
GRB	used from 597 nm out; 19 nm from the line	240/24	260/18 16°	270/20 11°	290/14 4°	280/24 -9°	300/34 -21°	310/51 -38°	310/54 -48°	300/71 -51°
LSE	used from 697 nm out; 71 nm from the line	220/33	250/29 17°	250/15 9°	260/12 6°	280/21 -9°	280/33 -20°	300/43 -36°	310/56 -45°	300/79 -53°
MSP	used from 796 nm out; 42 nm from the line	200/28	240/30 19°	240/24 12°	240/17 5°	270/24 -10°	270/33 -20°	280/48 -35°	290/55 -45°	280/84 -54°
AXN	used from 896 nm out; 33 nm from the line	L/V	220/23 17°	230/24 12°	240/25 5°	260/32 -11°	260/40 -21°	270/50 -35°	270/57 -45°	270/81 -55°
ABR	used from 1045 nm out; 54 nm from the line	030/24	220/5 16°	230/18 12°	230/32 5°	240/38 -10°	250/37 -20°	240/40 -35°	240/56 -44°	250/72 -52°
DIK	used from 1145 nm out; 97 nm from the line		110/15 6°	200/17 5°	230/31 1°	240/47 -10°	240/52 -20°	230/52 -36°	240/57 -45°	250/67 -51°
MLS	used from 1344 nm out; 55 nm from the line		120/22 5°	170/18 4°	200/33 1°	230/49 -10°	230/58 -21°	220/54 -37°	230/64 -44°	250/74 -49°
GGW	used from 1394 nm out; 53 nm from the line		090/18 0°	140/12 -2°	150/13 -3°	200/35 -12°	230/56 -22°	240/75 -37°	240/81 -46°	240/78 -49°
GTF	used from 1493 nm out; 100 nm from the line		070/21	080/18 -6°	120/5 -5°	180/30 -14°	200/53 -24°	210/80 -38°	220/83 -44°	230/68 -46°
GPI	used from 1692 nm out; 41 nm from the line		060/19 -3°	110/11 -8°	130/6 -8°	200/40 -19°	190/58 -28°	200/101 -39°	220/73 -43°	230/41 -43°
GEG	used from 1792 nm out; 51 nm from the line		050/18 -2°	060/19 -8°	L/V -11°	160/11 -24°	190/17 -31°	200/19 -35°	220/14 -37°	250/11 -41°
YKM	used from 1941 nm out; 68 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°
SEA	used from 1991 nm out; 46 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°

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
PHL Philadelphia, PA	departure	IFR Sky: a broken layer at 600 feet, a broken layer at 900 feet, overcast at 2,600 feet Weather: light rain, mist	from the northeast (040°) at 9 knots	3 mi	600 ft	35 ft	8:03 pm EDT (00:03 UTC)
UNV State College, PA	129 nm out, 5 nm west of the line, tower	IFR Sky: scattered clouds at 400 feet, a broken layer at 900 feet, overcast at 1,400 feet Weather: light rain, mist	from the north-northeast (020°) at 6 knots	2.5 mi	900 ft	1,231 ft	23:53 UTC
PTK Pontiac, MI	408 nm out, 12 nm south of the line, tower	IFR Sky: a few clouds at 500 feet, overcast at 1,600 feet	calm	1.5 mi	1,600 ft	980 ft	00:25 UTC
FNT Flint, MI	428 nm out, 3 nm southeast of the line, tower	marginal VFR Sky: overcast at 1,300 feet	calm	10+ mi	1,300 ft	782 ft	23:53 UTC
ATW Appleton, WI	647 nm out, 5 nm south of the line, tower	VFR Sky: scattered clouds at 12,000 feet	from the south-southwest (200°) at 6 knots	10+ mi	none	918 ft	23:45 UTC
STC St Cloud, MN	896 nm out, 4 nm south of the line, tower	VFR	from the northeast (050°) at 5 knots	10+ mi	none	1,030 ft	23:53 UTC
BIS Bismarck, ND	1185 nm out, 4 nm northeast of the line, tower	marginal VFR Sky: overcast at 1,400 feet	from the north-northeast (020°) at 14 knots, gusting to 25	10+ mi	1,400 ft	1,661 ft	23:52 UTC
GDV Glendive, MT	1354 nm out, 5 nm southeast of the line	IFR Sky: overcast at 600 feet Weather: light rain, mist	from the northeast (050°) at 17 knots, gusting to 23	4 mi	600 ft	2,458 ft	23:56 UTC
GTF Great Falls, MT	1623 nm out, 10 nm southeast of the line, tower	low IFR Sky: a broken layer at 400 feet, overcast at 900 feet Weather: light snow, mist	from the north-northeast (030°) at 11 knots	0.75 mi	400 ft	3,680 ft	23:53 UTC
COE Coeur D'Alene, ID	1842 nm out, 5 nm northeast of the line	VFR Sky: a few clouds at 5,000 feet, overcast at 6,500 feet	from the northeast (040°) at 13 knots	10+ mi	6,500 ft	2,320 ft	23:56 UTC
SFF Spokane, WA	1862 nm out, 3 nm southeast of the line, tower	VFR Sky: a broken layer at 6,500 feet, a broken layer at 8,000 feet, overcast at 11,000 feet	from the east-northeast (060°) at 15 knots, gusting to 20	10+ mi	6,500 ft	1,956 ft	23:53 UTC
BFI Seattle, WA	destination	VFR	variable at 6 knots	10+ mi	none	21 ft	4:53 pm PDT (23:53 UTC)

The highest airport on this list sits at 3,680 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At BFI when you get there the forecast at the estimated arrival, 10:14 am PDT (17:14 UTC)

Wind from the south-southeast at 3 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for BFI

From Sun 5:00 pm PDT (00:00 UTC): wind from the north-northwest at 8 knots, gusting to 18, visibility more than 6 miles, a few clouds at 5,000 feet
From Sun 7:00 pm PDT (02:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind light and variable, 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 3 knots, visibility more than 6 miles, clear skies
From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 3 knots, visibility more than 6 miles, clear skies
From Mon 2:00 pm PDT (21:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, clear skies

The forecast for PHL, the departure

From Sun 8:00 pm EDT (00:00 UTC): wind from the northeast at 10 knots, visibility 3 miles, light rain, mist, overcast at 800 feet
From Sun 11:00 pm EDT (03:00 UTC): wind from the north-northeast at 8 knots, visibility 5 miles, light rain, mist, overcast at 500 feet
From Mon 6:00 am EDT (10:00 UTC): wind from the north-northeast at 10 knots, visibility 5 miles, mist, overcast at 800 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the north at 12 knots, gusting to 19, visibility more than 6 miles, overcast at 2,500 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the north at 12 knots, gusting to 21, visibility more than 6 miles, overcast at 5,000 feet
From Mon 6:00 pm EDT (22:00 UTC): wind from the west-northwest at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

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

6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 12 nm from the route, 259 nm along the route · a VIP movement · today · ZOB
6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 12 nm from the route, 259 nm along the route · a VIP movement · today · ZOB
6/6656 ANOKA, MN, Monday, October 5, 2026 through Monday, October 19, 2026 Local 15 nm from the route, 856 nm along the route · security · until 19 October · ZMP

Daylight

Sunset at PHL 6:26 pm EDT (22:26 UTC), at BFI 6:27 pm PDT (01:27 UTC) (civil twilight ends 6:58 pm PDT (01:58 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 Northeast · loop National Weather Service

Radar now, the central Great Lakes · 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: Philadelphia International, Boeing Fld/King County International.