Seattle-Tacoma International to Shreveport Regional SEA → SHV
1,576 nautical miles (1,814 statute miles) southeast on a straight line, true course 115°, about 099° magnetic at the departure end (variation 16E). At 120 knots that is 11 h 11 min at the quickest height in today's winds (39,000 ft, a 21-knot tailwind), arriving about 8:51 am CDT (13:51 UTC). Right now SEA is VFR, wind from the north (360°) at 7 knots; SHV is VFR, wind from the south (180°) at 4 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
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 140 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 100 to 319 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 180 to 718 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 289 to 948 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 329 to 569 nm out.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 339 to 718 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 529 to 978 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 549 to 838 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 659 to 748 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 828 to 828 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). Over the route from 1008 to 1197 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
Not fetched just now.
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 16 forecast points nearest it (SEA, YKM, LWS, BOI, DLN, PIH, LND, RKS, DEN, PUB, GLD, GCK, GAG, OKC, DAL, SHV). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 5,500 ft | 220° at 17 kt | +1 kt | 16 °C | 119 kt | 13 h 15 min | 10:55 am CDT (15:55 UTC) |
| 7,500 ft | 220° at 16 kt | 0 | 8 °C | 120 kt | 13 h 08 min | 10:48 am CDT (15:48 UTC) |
| 9,500 ft | 230° at 15 kt | −2 kt | 5 °C | 122 kt | 12 h 55 min | 10:35 am CDT (15:35 UTC) |
| 11,500 ft | 240° at 17 kt | −5 kt | 2 °C | 125 kt | 12 h 36 min | 10:16 am CDT (15:16 UTC) |
| 13,500 ft | 230° at 19 kt | −5 kt | -2 °C | 125 kt | 12 h 36 min | 10:16 am CDT (15:16 UTC) |
| 15,500 ft | 230° at 21 kt | −4 kt | -6 °C | 124 kt | 12 h 43 min | 10:23 am CDT (15:23 UTC) |
| 17,500 ft | 220° at 23 kt | −2 kt | -10 °C | 122 kt | 12 h 55 min | 10:35 am CDT (15:35 UTC) |
| 18,000 ft FL180 | 220° at 24 kt | −2 kt | -11 °C | 122 kt | 12 h 55 min | 10:35 am CDT (15:35 UTC) |
| 24,000 ft FL240 | 220° at 28 kt | −3 kt | -22 °C | 123 kt | 12 h 49 min | 10:29 am CDT (15:29 UTC) |
| 30,000 ft FL300 | 240° at 40 kt | −15 kt | -31 °C | 135 kt | 11 h 40 min | 9:20 am CDT (14:20 UTC) |
| 34,000 ft FL340 | 240° at 43 kt | −19 kt | -37 °C | 139 kt | 11 h 20 min | 9:00 am CDT (14:00 UTC) |
| 39,000 ft FL390 | 250° at 42 kt | −21 kt | -45 °C | 141 kt | 11 h 11 min | 8:51 am CDT (13:51 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; 22 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; 62 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° |
| BOI | used from 299 nm out; 93 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° | |
| DLN | used from 349 nm out; 86 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° | ||
| PIH | used from 449 nm out; 50 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° | |
| LND | used from 549 nm out; 75 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° | ||
| RKS | used from 649 nm out; 30 nm from the line | 200/41 | 220/44 1° | 220/35 -11° | 220/46 -24° | 210/53 -27° | 220/62 -35° | 230/61 -44° | ||
| DEN | used from 798 nm out; 65 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° | ||
| PUB | used from 948 nm out; 72 nm from the line | 230/25 13° | 230/32 6° | 220/44 -8° | 230/49 -21° | 240/70 -28° | 240/67 -34° | 240/58 -46° | ||
| GLD | used from 998 nm out; 63 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° | |
| GCK | used from 1048 nm out; 41 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° | |
| GAG | used from 1147 nm out; 38 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° | |
| OKC | used from 1247 nm out; 46 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° |
| DAL | used from 1397 nm out; 89 nm from the line | 190/29 | 220/23 17° | 220/17 13° | 250/18 8° | 230/18 -5° | 240/18 -15° | 270/34 -29° | 280/33 -39° | 300/36 -51° |
| SHV | used from 1497 nm out; 55 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° |
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) |
| PSC Pasco, WA | 150 nm out, 7 nm southwest of the line, tower | VFR Sky: overcast at 9,000 feet | from the north (010°) at 7 knots | 10+ mi | 9,000 ft | 410 ft | 01:53 UTC |
| ALW Walla Walla, WA | 180 nm out, 5 nm southeast of the line, tower | VFR Sky: scattered clouds at 5,500 feet, overcast at 8,000 feet | from the south-southwest (210°) at 4 knots | 10+ mi | 8,000 ft | 1,194 ft | 01:53 UTC |
| LLJ Challis, ID | 379 nm out, 1 nm southeast of the line | marginal VFR Sky: scattered clouds at 1,900 feet, overcast at 2,800 feet Weather: light rain | from the north-northwest (340°) at 9 knots | 10+ mi | 2,800 ft | 5,075 ft | 01:55 UTC |
| IDA Idaho Falls, ID | 489 nm out, 5 nm south of the line, tower | VFR Sky: scattered clouds at 1,000 feet, overcast at 9,500 feet | from the east-northeast (060°) at 5 knots | 10+ mi | 9,500 ft | 4,743 ft | 02:29 UTC |
| DWX Dixon, WY | 738 nm out, 17 nm south of the line | VFR | from the southeast (130°) at 15 knots, gusting to 27 | 10+ mi | none | 6,548 ft | 02:15 UTC |
| DEN Denver, CO | 888 nm out, 2 nm northeast of the line, tower | VFR Sky: a few clouds at 14,000 feet, a broken layer at 22,000 feet | from the south-southwest (200°) at 14 knots | 10+ mi | 22,000 ft | 5,433 ft | 01:53 UTC |
| LIC Limon, CO | 948 nm out, 2 nm north of the line | VFR | from the south-southwest (200°) at 10 knots | 10+ mi | none | 5,374 ft | 01:55 UTC |
| GCK Garden City, KS | 1108 nm out, 24 nm northeast of the line, tower | VFR | from the south (170°) at 11 knots | 10+ mi | none | 2,890 ft | 01:54 UTC |
| OUN Norman, OK | 1327 nm out, 3 nm east of the line, tower | VFR | from the southeast (140°) at 11 knots | 10+ mi | none | 1,181 ft | 01:45 UTC |
| PRX Paris, TX | 1467 nm out, 3 nm south of the line | VFR | from the south-southeast (160°) at 8 knots | 10+ mi | none | 547 ft | 01:55 UTC |
| SHV Shreveport, LA | destination | VFR Sky: scattered clouds at 30,000 feet | from the south (180°) at 4 knots | 10+ mi | none | 257 ft | 8:56 pm CDT (01:56 UTC) |
The highest airport on this list sits at 6,548 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SHV when you get there the forecast at the estimated arrival, 8:51 am CDT (13:51 UTC)
Wind from the south at 3 knots, visibility more than 6 miles, clear skies VFR
The whole forecast for SHV
- From Sun 7:00 pm CDT (00:00 UTC): wind from the south-southeast at 6 knots, visibility more than 6 miles, a few clouds at 20,000 feet, a broken layer at 30,000 feet
- From Sun 10:00 pm CDT (03:00 UTC): wind from the south at 3 knots, visibility more than 6 miles, clear skies
- From Mon 11:00 am CDT (16:00 UTC): wind from the south at 12 knots, gusting to 19, visibility more than 6 miles, scattered clouds at 25,000 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
No temporary flight restriction on or near this route right now.
Daylight
Sunset at SEA 6:27 pm PDT (01:27 UTC), at SHV 6:46 pm CDT (23:46 UTC) (civil twilight ends 7:11 pm CDT (00:11 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
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, Shreveport Regional.