Plan a flight · Sun 7:33 pm EDT (23:33 UTC)

Patrick Leahy Burlington International to Van Nuys Airport BTV → VNY

2,163 nautical miles (2,490 statute miles) west on a straight line, true course 269°, about 284° magnetic at the departure end (variation 15W). At 120 knots that is 20 h 13 min at the quickest height in today's winds (4,500 ft, a 13-knot headwind), arriving about 12:46 pm PDT (19:46 UTC). Right now BTV is VFR, wind from the south (180°) at 7 knots; VNY is VFR, wind from the south (180°) at 10 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 W63W: thunderstorms (a convective SIGMET) up to 37,000 ft, moving from the southwest at 40 knots, until 8:55 pm EDT (00:55 UTC). Over the route from 1535 to 1685 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.

AIRMET ZULU 1C: moderate icing up to 24,000 ft. Over the first 120 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 110 nm of the route.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 110 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, at the departure end.
AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Near the route, 439 nm along the route.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1316 to 2054 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 1406 to 1994 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1505 to 1994 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 1525 to 1715 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 1655 to 1705 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 1705 to 2074 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 1814 to 1944 nm out.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 2004 to 2153 nm out.
AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 2113 to 2153 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 BTV.

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

urgent E545 at 6,000 ft, 2 nm east, 5:49 pm EDT (21:49 UTC): remarks: low-level wind shear + 5 knots fap runway 17L. 1436 nm along the route, 2 nm east of the line.
as filed, and in English
```
APA UUA /OV APA350002/TM 2149/FL060/TP E545/RM LLWS +/- 5 KT FAP RWY 17L
```
Report
an urgent report filed through APA
Where
2 nm north (350°) of APA
Time
21:49 UTC
Height
at 6,000 ft
Aircraft
E545
Remarks
low-level wind shear + 5 knots fap runway 17L
B763 at 30,000 ft, 23 nm southeast, 5:39 pm EDT (21:39 UTC): moderate turbulence. At the departure end, 23 nm southeast of the line.
as filed, and in English
```
MPV UA /OV MPV330015/TM 2139/FL300/TP B763/TB MOD
```
Report
a routine report filed through MPV
Where
15 nm northwest (330°) of MPV
Time
21:39 UTC
Height
at 30,000 ft
Aircraft
B763
Turbulence
moderate
C182 at 4,500 ft, 23 nm north, 5:02 pm EDT (21:02 UTC): moderate turbulence. 1017 nm along the route, 23 nm north of the line.
as filed, and in English
```
SUX UA /OV SUX170003/TM 2102/FL045/TP C182/TB CONS MOD
```
Report
a routine report filed through SUX
Where
3 nm south (170°) of SUX
Time
21:02 UTC
Height
at 4,500 ft
Aircraft
C182
Turbulence
continuous moderate
GLF5 at 45,000 ft, 24 nm south, 6:44 pm EDT (22:44 UTC): moderate turbulence, remarks: ZDVWC-46. 1436 nm along the route, 24 nm south of the line.
as filed, and in English
```
COS UA /OV COS350025/TM 2244/FL450/TP GLF5/TB MOD /RM ZDVWC-46
```
Report
a routine report filed through COS
Where
25 nm north (350°) of COS
Time
22:44 UTC
Height
at 45,000 ft
Aircraft
GLF5
Turbulence
moderate
Remarks
ZDVWC-46
CRJ2 at 19,000 ft, 36 nm southeast, 6:02 pm EDT (22:02 UTC): moderate chop turbulence, remarks: during the climb from KDEN from 12,000 ft to 19,000 ft ZDVWC-41. 1456 nm along the route, 36 nm southeast of the line.
as filed, and in English
```
COS UA /OV BRK262015/TM 2202/FL190/TP CRJ2/TB MOD CHOP/RM DURC FROM KDEN 120-190 ZDVWC-41
```
Report
a routine report filed through COS
Where
15 nm west (262°) of BRK
Time
22:02 UTC
Height
at 19,000 ft
Aircraft
CRJ2
Turbulence
moderate chop
Remarks
during the climb from KDEN from 12,000 ft to 19,000 ft ZDVWC-41
C700 at 16,000 ft, 29 nm north, 5:55 pm EDT (21:55 UTC): moderate turbulence. 1515 nm along the route, 29 nm north of the line.
as filed, and in English
```
ASE UA /OV WERNR/TM 2155/FL160/TP C700/TB MOD
```
Report
a routine report filed through ASE
Where
wernr
Time
21:55 UTC
Height
at 16,000 ft
Aircraft
C700
Turbulence
moderate
C680A at 16,000 ft, 15 nm northwest, 6:59 pm EDT (22:59 UTC): moderate turbulence, scattered clouds above 16,000 ft, remarks: during the descent. 1525 nm along the route, 15 nm northwest of the line.
as filed, and in English
```
ASE UA /OV HAERI/TM 2259/FL160/TP C680A/SK SCT160/TB CONS MOD/RM DURD
```
Report
a routine report filed through ASE
Where
haeri
Time
22:59 UTC
Height
at 16,000 ft
Aircraft
C680A
Sky
scattered clouds from 16,000 ft
Turbulence
continuous moderate
Remarks
during the descent
B737 at 36,000 ft, 27 nm northwest, 5:28 pm EDT (21:28 UTC): moderate turbulence, remarks: zdvwc. 1525 nm along the route, 27 nm northwest of the line.
as filed, and in English
```
ASE UA /OV DBL/TM 2128/FL360/TP B737/TB MOD/RM ZDVWC
```
Report
a routine report filed through ASE
Where
over DBL
Time
21:28 UTC
Height
at 36,000 ft
Aircraft
B737
Turbulence
moderate
Remarks
zdvwc
LJ40 at 19,000 ft, 15 nm northwest, 5:32 pm EDT (21:32 UTC): moderate turbulence. 1535 nm along the route, 15 nm northwest of the line.
as filed, and in English
```
ASE UA /OV ASE240010/TM 2132/FL190/TP LJ40/TB MOD
```
Report
a routine report filed through ASE
Where
10 nm southwest (240°) of ASE
Time
21:32 UTC
Height
at 19,000 ft
Aircraft
LJ40
Turbulence
moderate
C680 at 18,000 ft, 12 nm northwest, 6:35 pm EDT (22:35 UTC): moderate turbulence, remarks: from 18,000 ft to 10,000 ft. 1545 nm along the route, 12 nm northwest of the line.
as filed, and in English
```
ASE UA /OV ASE230020/TM 2235/FL180/TP C680/TB MOD/RM 180-100
```
Report
a routine report filed through ASE
Where
20 nm southwest (230°) of ASE
Time
22:35 UTC
Height
at 18,000 ft
Aircraft
C680
Turbulence
moderate
Remarks
from 18,000 ft to 10,000 ft
C25B at 23,000 ft, 6 nm east, 5:06 pm EDT (21:06 UTC): moderate rime icing, -5 °C, remarks: zlawc. 1824 nm along the route, 6 nm east of the line.
as filed, and in English
```
GJT UA /OV PGA255040/TM 2106/FL230/TP C25B/TA M05/IC MOD RIME/RM ZLAWC AWC-WEB
```
Report
a routine report filed through GJT
Where
40 nm west (255°) of PGA
Time
21:06 UTC
Height
at 23,000 ft
Aircraft
C25B
Temperature
−5 °C
Icing
moderate rime
Remarks
zlawc
UAL493 at 24,000 ft, 18 nm northwest, 6:54 pm EDT (22:54 UTC): moderate turbulence. 1874 nm along the route, 18 nm northwest of the line.
as filed, and in English
```
ARP UAL493 3648N 11330W 2254 F240 TB MODERATE SK IN CLOUDS IC LIGHT
```
Report
a routine report filed through ARP
CL30 at 24,000 ft, 20 nm southeast, 5:00 pm EDT (21:00 UTC): moderate clear-air turbulence from 19,000 ft to 24,000 ft, light rime icing, -3 °C, remarks: during the climb zlawc. 2064 nm along the route, 20 nm southeast of the line.
as filed, and in English
```
DAG UA /OV HEC/TM 2100/FL240/TP CL30/TA M03/TB MOD CAT OCNL 190-240/IC LGT RIME/RM DURC ZLAWC AWC-WEB
```
Report
a routine report filed through DAG
Where
over HEC
Time
21:00 UTC
Height
at 24,000 ft
Aircraft
CL30
Temperature
−3 °C
Turbulence
moderate clear-air turbulence occasional from 19,000 ft to 24,000 ft
Icing
light rime
Remarks
during the climb zlawc
B737 at 14,000 ft, 16 nm south, 5:54 pm EDT (21:54 UTC): moderate turbulence. At the destination end, 16 nm south of the line.
as filed, and in English
```
ONT UA /OV 20N ONT/TM 2154/FL140/TP B737/TB MOD
```
Report
a routine report filed through ONT
Where
20N ont
Time
21:54 UTC
Height
at 14,000 ft
Aircraft
B737
Turbulence
moderate

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 18 forecast points nearest it (ALB, SYR, BUF, TVC, MKG, GRB, DBQ, MCW, DSM, OMA, GRI, GLD, DEN, GJT, BCE, LAS, ONT, WJF). 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	210° at 19 kt	+13 kt	14 °C	107 kt	20 h 13 min	12:46 pm PDT (19:46 UTC)
6,500 ft	220° at 17 kt	+15 kt	13 °C	105 kt	20 h 36 min	1:09 pm PDT (20:09 UTC)
8,500 ft	230° at 18 kt	+17 kt	10 °C	103 kt	21 h	1:33 pm PDT (20:33 UTC)
10,500 ft	230° at 20 kt	+20 kt	6 °C	100 kt	21 h 38 min	2:11 pm PDT (21:11 UTC)
12,500 ft	230° at 21 kt	+21 kt	2 °C	99 kt	21 h 51 min	2:24 pm PDT (21:24 UTC)
14,500 ft	230° at 23 kt	+23 kt	-2 °C	97 kt	22 h 18 min	2:51 pm PDT (21:51 UTC)
16,500 ft	230° at 25 kt	+25 kt	-7 °C	95 kt	22 h 46 min	3:19 pm PDT (22:19 UTC)
18,000 ft FL180	240° at 26 kt	+27 kt	-10 °C	93 kt	23 h 15 min	3:48 pm PDT (22:48 UTC)
24,000 ft FL240	240° at 31 kt	+31 kt	-21 °C	89 kt	24 h 18 min	4:51 pm PDT (23:51 UTC)
30,000 ft FL300	240° at 40 kt	+40 kt	-32 °C	80 kt	27 h 02 min	7:35 pm PDT (02:35 UTC)
34,000 ft FL340	250° at 48 kt	+49 kt	-40 °C	71 kt	30 h 28 min	11:01 pm PDT (06:01 UTC)
39,000 ft FL390	250° at 55 kt	+56 kt	-49 °C	64 kt	33 h 48 min	2:21 am PDT (09:21 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
ALB	used from 0 nm out; 103 nm from the line	160/27	190/16 9°	200/29 7°	230/21 3°	240/24 -9°	240/43 -19°	230/65 -33°	240/91 -42°	230/99 -53°
SYR	used from 50 nm out; 96 nm from the line	160/17	200/22 10°	250/10 6°	L/V 1°	270/11 -11°	220/25 -20°	220/66 -36°	230/89 -42°	240/74 -51°
BUF	used from 199 nm out; 84 nm from the line	170/19	L/V 10°	040/9 6°	220/8 2°	230/15 -11°	220/33 -22°	220/47 -35°	230/55 -41°	230/56 -50°
TVC	used from 399 nm out; 121 nm from the line	210/17	290/14 15°	310/20 9°	310/18 2°	310/24 -11°	320/35 -22°	320/53 -39°	310/45 -49°	290/58 -51°
MKG	used from 498 nm out; 55 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 648 nm out; 75 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°
DBQ	used from 698 nm out; 60 nm from the line	220/23	240/22 16°	240/24 10°	260/18 5°	270/16 -8°	290/27 -19°	310/42 -35°	320/55 -44°	300/71 -52°
MCW	used from 847 nm out; 38 nm from the line	200/35	240/33 18°	250/20 10°	260/10 6°	270/18 -8°	260/28 -19°	280/30 -34°	290/49 -43°	280/70 -54°
DSM	used from 897 nm out; 53 nm from the line	200/32	240/27 17°	260/19 10°	260/16 5°	260/19 -7°	240/22 -19°	270/20 -32°	270/38 -42°	290/58 -53°
OMA	used from 947 nm out; 57 nm from the line	190/34	230/34 19°	250/25 12°	250/18 6°	250/22 -7°	250/28 -19°	260/34 -32°	260/39 -41°	280/56 -51°
GRI	used from 1047 nm out; 59 nm from the line		210/31 19°	240/21 14°	240/17 6°	260/27 -7°	260/34 -18°	240/45 -32°	250/56 -40°	260/62 -51°
GLD	used from 1246 nm out; 73 nm from the line		190/29	200/30 15°	240/23 8°	250/39 -7°	230/39 -19°	230/57 -31°	240/67 -39°	250/62 -49°
DEN	used from 1346 nm out; 51 nm from the line			190/31 16°	210/32 7°	240/41 -8°	230/47 -21°	240/56 -32°	250/65 -37°	250/61 -47°
GJT	used from 1495 nm out; 91 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°
BCE	used from 1695 nm out; 82 nm from the line				210/47 0°	200/50 -12°	220/31 -23°	220/56 -26°	220/58 -35°	230/58 -45°
LAS	used from 1894 nm out; 50 nm from the line		200/25 11°	230/22 5°	240/25 -1°	220/37 -12°	220/44 -21°	210/52 -27°	210/60 -34°	220/58 -44°
ONT	used from 2044 nm out; 68 nm from the line	230/11	200/17 6°	230/27 4°	230/32 -2°	210/39 -12°	220/51 -20°	220/48 -29°	210/51 -34°	210/52 -44°
WJF	used from 2094 nm out; 27 nm from the line		220/30 8°	240/28 5°	230/34 -2°	220/34 -13°	220/48 -20°	220/47 -29°	210/48 -34°	220/52 -44°

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
BTV Burlington, VT	departure	VFR Sky: overcast at 7,000 feet	from the south (180°) at 7 knots	10+ mi	7,000 ft	334 ft	6:54 pm EDT (22:54 UTC)
SLK Saranac Lake, NY	50 nm out, 6 nm southeast of the line	VFR Sky: a broken layer at 3,800 feet, overcast at 9,000 feet	calm	10+ mi	3,800 ft	1,662 ft	22:51 UTC
CYPQ Peterborough,	219 nm out, 7 nm southwest of the line	VFR Sky: a few clouds at 2,500 feet, a broken layer at 4,000 feet, overcast at 4,700 feet Weather: light rain	variable at 2 knots	9 mi	4,000 ft	628 ft	23:24 UTC
MWC Milwaukee, WI	648 nm out, 16 nm south of the line, tower	VFR	from the south-southeast (160°) at 5 knots	10+ mi	none	744 ft	23:15 UTC
MSN Madison, WI	708 nm out, 4 nm southeast of the line, tower	VFR Sky: a few clouds at 25,000 feet	from the south (190°) at 6 knots	10+ mi	none	886 ft	22:53 UTC
EBS Webster City, IA	907 nm out, 2 nm northwest of the line	VFR	from the south (170°) at 9 knots, gusting to 16	10+ mi	none	1,121 ft	23:15 UTC
IML Imperial, NE	1276 nm out, 3 nm southeast of the line	VFR	from the east (100°) at 8 knots	10+ mi	none	3,276 ft	22:53 UTC
APA Denver, CO	1436 nm out, 3 nm southeast of the line, tower	VFR Sky: a few clouds at 10,000 feet, a broken layer at 14,000 feet, a broken layer at 22,000 feet	from the south (190°) at 11 knots	10+ mi	14,000 ft	5,884 ft	22:53 UTC
ASE Aspen, CO	1525 nm out, 15 nm northwest of the line, tower	VFR Sky: a broken layer at 9,000 feet, a broken layer at 11,000 feet Weather: light rain	from the west-northwest (290°) at 9 knots	10+ mi	9,000 ft	7,837 ft	23:09 UTC
KNB Kanab, UT	1824 nm out, 9 nm northwest of the line	reported, no category	from the south (190°) at 13 knots	4 mi	none	4,867 ft	23:15 UTC
VCV Victorville, CA	2104 nm out, 7 nm southeast of the line, tower	VFR	from the south (170°) at 34 knots	10+ mi	none	2,885 ft	23:10 UTC
VNY Van Nuys, CA	destination	VFR Sky: scattered clouds at 11,000 feet	from the south (180°) at 10 knots	10+ mi	none	802 ft	3:51 pm PDT (22:51 UTC)

The highest airport on this list sits at 7,837 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At VNY when you get there the forecast at the estimated arrival, 12:46 pm PDT (19:46 UTC)

Wind light and variable, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 10,000 feet VFR

The whole forecast for VNY

From Sun 11:00 am PDT (18:00 UTC): wind from the south-southeast at 10 knots, visibility more than 6 miles, light rain showers, a broken layer at 2,200 feet, a broken layer at 10,000 feet
From Sun 2:00 pm PDT (21:00 UTC): wind from the south-southeast at 12 knots, visibility more than 6 miles, scattered clouds at 5,000 feet, a broken layer at 10,000 feet
30% chance between Sun 2:00 pm PDT (21:00 UTC) and 6:00 pm PDT (01:00 UTC): light rain showers
From Sun 6:00 pm PDT (01:00 UTC): wind from the south at 8 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 12,000 feet
30% chance between Sun 6:00 pm PDT (01:00 UTC) and 11:00 pm PDT (06:00 UTC): light rain showers
From Sun 11:00 pm PDT (06:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 10,000 feet
30% chance between Sun 11:00 pm PDT (06:00 UTC) and 5:00 am PDT (12:00 UTC): light rain showers

The forecast for BTV, the departure

From Sun 8:00 pm EDT (00:00 UTC): wind from the south at 8 knots, gusting to 16, visibility more than 6 miles, overcast at 6,000 feet
30% chance between Sun 8:00 pm EDT (00:00 UTC) and 12:00 am EDT (04:00 UTC): visibility 5 miles, light rain, mist, overcast at 3,500 feet
From Mon 12:00 am EDT (04:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, overcast at 3,500 feet
30% chance between Mon 12:00 am EDT (04:00 UTC) and 2:00 am EDT (06:00 UTC): visibility 5 miles, light rain, mist
From Mon 5:00 am EDT (09:00 UTC): wind light and variable, visibility more than 6 miles, overcast at 1,500 feet
From Mon 8:00 am EDT (12:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 4,000 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the north at 6 knots, visibility more than 6 miles, a broken layer at 2,500 feet

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

6/8784 LAKE GEORGE, CO, Sunday, October 11, 2026 through Tuesday, October 13, 2026 UTC 24 nm from the route, 1475 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
6/8808 Las Vegas, NV, Tuesday, October 13, 2026 Local 15 nm from the route, 1964 nm along the route · security · starts Tuesday 13 October · ZLA

Daylight

Sunset at BTV 6:13 pm EDT (22:13 UTC), at VNY 6:23 pm PDT (01:23 UTC) (civil twilight ends 6:48 pm PDT (01:48 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 upper Mississippi valley · loop National Weather Service

Radar now, the northern 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: Patrick Leahy Burlington International, Van Nuys Airport.