Plan a flight · Mon 1:15 am CDT (06:15 UTC)

Louis Armstrong New Orleans International to Seattle-Tacoma International MSY → SEA

1,811 nautical miles (2,084 statute miles) northwest on a straight line, true course 314°, about 315° magnetic at the departure end (variation 1W). At 120 knots that is 14 h 51 min at the quickest height in today's winds (4,500 ft, a 2-knot tailwind), arriving about 2:06 pm PDT (21:06 UTC). Right now MSY is VFR, wind calm; SEA is VFR, wind from the east-southeast (110°) 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: 1,247 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

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 448 to 826 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 826 to 1214 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the route from 836 to 1214 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 965 to 1144 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1035 to 1622 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1064 to 1472 nm out.
AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 1074 to 1144 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 1353 to 1542 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1363 to 1532 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1482 to 1691 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 189 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 MSY.

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

urgent B737 at 7,600 ft, 46 nm southwest, 10:22 pm CDT (03:22 UTC): remarks: low-level wind shear 45 knots crosswind on final. 1035 nm along the route, 46 nm southwest of the line.
as filed, and in English
```
HDN UUA /OV HDN/TM 0322/FL076/TP B737/RM LLWS 45 KTS CROSSWIND ON FINAL
```
Report
an urgent report filed through HDN
Where
over HDN
Time
03:22 UTC
Height
at 7,600 ft
Aircraft
B737
Remarks
low-level wind shear 45 knots crosswind on final
A320 descending, 12 nm southwest, 10:19 pm CDT (03:19 UTC): no turbulence up to 10,000 ft. 915 nm along the route, 12 nm southwest of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0319/FLDURD/TP A320/TB NEG BLO 100
```
Report
a routine report filed through DEN
Where
over DEN
Time
03:19 UTC
Height
during the descent
Aircraft
A320
Turbulence
no below 10,000 ft
B38M at 21,500 ft, 3 nm southwest, 11:33 pm CDT (04:33 UTC): light turbulence up to 25,000 ft, remarks: during the descent flati star ZDVWC-13. 985 nm along the route, 3 nm southwest of the line.
as filed, and in English
```
DEN UA /OV DEN305065/TM 0433/FL215/TP B38M/TB LGT BLO 250/RM DURD FLATI STAR. ZDVWC-13
```
Report
a routine report filed through DEN
Where
65 nm northwest (305°) of DEN
Time
04:33 UTC
Height
at 21,500 ft
Aircraft
B38M
Turbulence
light below 25,000 ft
Remarks
during the descent flati star ZDVWC-13
E75L descending, 36 nm southwest, 11:35 pm CDT (04:35 UTC): light turbulence from 11,000 ft to 14,000 ft, light rime icing from 8,000 ft to 12,000 ft, -10 °C. 1641 nm along the route, 36 nm southwest of the line.
as filed, and in English
```
GEG UA /OV PDT/TM 0435/FLDURD/TP E75L/TA M10/TB LT TURB 140-110/IC LT RIME 120-080
```
Report
a routine report filed through GEG
Where
over PDT
Time
04:35 UTC
Height
during the descent
Aircraft
E75L
Temperature
−10 °C
Turbulence
lt turbulence from 14,000 ft to 11,000 ft
Icing
lt rime from 12,000 ft to 8,000 ft
E75L at 1,500 ft, 10 nm south, 11:49 pm CDT (04:49 UTC): remarks: low-level wind shear loss of 8 knots on final. 1661 nm along the route, 10 nm south of the line.
as filed, and in English
```
PSC UA /OV PSC120003/TM 0449/FL015/TP E75L/RM LLWS LOSS OF 8 KTS ON FINAL
```
Report
a routine report filed through PSC
Where
3 nm southeast (120°) of PSC
Time
04:49 UTC
Height
at 1,500 ft
Aircraft
E75L
Remarks
low-level wind shear loss of 8 knots on final

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 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 17 forecast points nearest it (MSY, LCH, SHV, FSM, OKC, GAG, GCK, GLD, DEN, RKS, LND, PIH, DLN, BOI, LWS, 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	210° at 16 kt	−2 kt	16 °C	122 kt	14 h 51 min	2:06 pm PDT (21:06 UTC)
6,500 ft	220° at 15 kt	0	11 °C	120 kt	15 h 06 min	2:21 pm PDT (21:21 UTC)
8,500 ft	230° at 14 kt	+2 kt	8 °C	118 kt	15 h 21 min	2:36 pm PDT (21:36 UTC)
10,500 ft	240° at 15 kt	+4 kt	5 °C	116 kt	15 h 37 min	2:52 pm PDT (21:52 UTC)
12,500 ft	240° at 16 kt	+6 kt	1 °C	114 kt	15 h 53 min	3:08 pm PDT (22:08 UTC)
14,500 ft	230° at 17 kt	+5 kt	-3 °C	115 kt	15 h 45 min	3:00 pm PDT (22:00 UTC)
16,500 ft	230° at 19 kt	+4 kt	-7 °C	116 kt	15 h 37 min	2:52 pm PDT (21:52 UTC)
18,000 ft FL180	230° at 20 kt	+3 kt	-10 °C	117 kt	15 h 29 min	2:44 pm PDT (21:44 UTC)
24,000 ft FL240	230° at 24 kt	+4 kt	-22 °C	116 kt	15 h 37 min	2:52 pm PDT (21:52 UTC)
30,000 ft FL300	250° at 35 kt	+18 kt	-31 °C	102 kt	17 h 45 min	5:00 pm PDT (00:00 UTC)
34,000 ft FL340	250° at 38 kt	+22 kt	-38 °C	98 kt	18 h 29 min	5:44 pm PDT (00:44 UTC)
39,000 ft FL390	250° at 36 kt	+23 kt	-46 °C	97 kt	18 h 40 min	5:55 pm PDT (00:55 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
MSY	used from 0 nm out; 25 nm from the line	110/5	150/6 19°	L/V 12°	310/5 7°	310/13 -4°	290/20 -16°	330/36 -31°	330/37 -41°	350/43 -52°
LCH	used from 99 nm out; 101 nm from the line	160/21	160/18 18°	180/13 12°	230/6 8°	280/10 -4°	260/13 -14°	310/29 -30°	320/32 -40°	330/33 -53°
SHV	used from 149 nm out; 63 nm from the line	200/18	230/24 18°	230/24 12°	240/14 8°	260/12 -4°	240/11 -15°	300/31 -29°	300/32 -40°	300/36 -52°
FSM	used from 348 nm out; 91 nm from the line	210/27	250/23 16°	250/20 13°	240/17 8°	250/18 -6°	260/31 -16°	280/42 -30°	280/44 -40°	290/38 -51°
OKC	used from 398 nm out; 70 nm from the line	200/44	230/32 18°	240/13 15°	240/10 9°	240/20 -5°	250/27 -16°	260/47 -28°	270/48 -39°	270/45 -50°
GAG	used from 547 nm out; 52 nm from the line		220/40 19°	230/28 14°	240/23 8°	230/21 -6°	240/31 -19°	250/66 -29°	260/58 -38°	260/47 -49°
GCK	used from 647 nm out; 35 nm from the line		220/48 21°	230/37 14°	250/30 8°	230/37 -6°	240/37 -20°	240/69 -28°	250/67 -37°	260/58 -48°
GLD	used from 746 nm out; 56 nm from the line		230/49	230/42 15°	220/26 8°	240/18 -7°	230/27 -21°	240/62 -30°	240/61 -35°	250/57 -47°
DEN	used from 846 nm out; 53 nm from the line			240/21 14°	250/44 6°	220/49 -8°	220/49 -21°	230/54 -30°	240/57 -35°	240/49 -45°
RKS	used from 1045 nm out; 85 nm from the line			200/41	220/44 1°	220/35 -11°	220/46 -24°	210/53 -27°	220/62 -35°	230/61 -44°
LND	used from 1144 nm out; 33 nm from the line			200/23 6°	220/31 1°	220/39 -11°	230/39 -23°	220/51 -28°	220/66 -37°	230/68 -45°
PIH	used from 1244 nm out; 74 nm from the line		L/V	240/13 1°	240/15 -3°	210/42 -15°	200/70 -25°	220/74 -29°	220/71 -36°	220/62 -43°
DLN	used from 1393 nm out; 74 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°
BOI	used from 1442 nm out; 98 nm from the line		300/7 2°	280/5 -4°	210/16 -9°	210/60 -20°	210/75 -29°	210/63 -32°	220/64 -32°	220/54 -39°
LWS	used from 1492 nm out; 79 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°
YKM	used from 1641 nm out; 59 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°
SEA	used from 1741 nm out; 45 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°

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
MSY New Orleans, LA	departure	VFR Sky: a broken layer at 25,000 feet	calm	10+ mi	25,000 ft	3 ft	12:53 am CDT (05:53 UTC)
BTR Baton Rouge, LA	60 nm out, 10 nm south of the line, tower	VFR	calm	10+ mi	none	69 ft	05:53 UTC
DTN Shreveport, LA	239 nm out, 13 nm southwest of the line, tower	VFR	from the south-southwest (210°) at 10 knots	10+ mi	none	179 ft	05:53 UTC
PWA Oklahoma City, OK	497 nm out, 7 nm southwest of the line, tower	VFR	from the south (190°) at 15 knots	10+ mi	none	1,299 ft	05:53 UTC
GCK Garden City, KS	706 nm out, 11 nm northeast of the line, tower	VFR	from the south-southwest (200°) at 19 knots	10+ mi	none	2,890 ft	05:54 UTC
LIC Limon, CO	865 nm out, 10 nm southwest of the line	VFR	from the south-southwest (200°) at 12 knots, gusting to 21	10+ mi	none	5,374 ft	05:55 UTC
CFO Denver, CO	915 nm out, 9 nm southwest of the line, tower	VFR	from the south-southwest (210°) at 24 knots, gusting to 31	10+ mi	none	5,515 ft	05:55 UTC
PNA Pinedale, WY	1214 nm out, 6 nm northeast of the line	VFR Sky: a broken layer at 6,000 feet, overcast at 7,000 feet Weather: light drizzle	from the west-northwest (300°) at 4 knots	10+ mi	6,000 ft	7,096 ft	05:55 UTC
IDA Idaho Falls, ID	1323 nm out, 11 nm south of the line, tower	marginal VFR Sky: overcast at 2,000 feet	calm	10+ mi	2,000 ft	4,743 ft	05:53 UTC
ALW Walla Walla, WA	1622 nm out, 5 nm west of the line, tower	VFR Sky: scattered clouds at 6,500 feet, a broken layer at 9,000 feet, overcast at 12,000 feet	from the south-southeast (150°) at 5 knots	10+ mi	9,000 ft	1,194 ft	05:53 UTC
PSC Pasco, WA	1661 nm out, 9 nm southwest of the line, tower	VFR Sky: overcast at 9,000 feet	from the north-northwest (340°) at 6 knots	10+ mi	9,000 ft	410 ft	05:53 UTC
SEA Seattle, WA	destination	VFR	from the east-southeast (110°) at 6 knots	10+ mi	none	432 ft	10:53 pm PDT (05:53 UTC)

The highest airport on this list sits at 7,096 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SEA when you get there the forecast at the estimated arrival, 2:06 pm PDT (21:06 UTC)

Wind from the west at 6 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for SEA

From Sun 11:00 pm PDT (06:00 UTC): wind from the east-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 south at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for MSY, the departure

From Mon 1:00 am CDT (06:00 UTC): wind from the southeast at 5 knots, visibility more than 6 miles, clear skies

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

No temporary flight restriction on or near this route right now.

Daylight

Sunset at MSY 6:33 pm CDT (23:33 UTC), at SEA 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 lower Mississippi valley · loop National Weather Service

Radar now, the southern Plains · 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: Louis Armstrong New Orleans International, Seattle-Tacoma International.