Seattle-Tacoma International to Huntsville Intl-Carl T Jones Field SEA → HSV
1,763 nautical miles (2,029 statute miles) east on a straight line, true course 103°, about 087° magnetic at the departure end (variation 16E). At 120 knots that is 11 h 41 min at the quickest height in today's winds (39,000 ft, a 31-knot tailwind), arriving about 3:44 pm CDT (20:44 UTC). 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 389 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 149 to 468 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 209 to 667 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 269 to 966 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 478 to 677 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 687 to 837 nm out.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Near the route, 727 nm along the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 777 to 787 nm out.
- 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 936 to 1425 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, fog). Over the last 20 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 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 08:00–15:00 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, DLN, BIL, LND, RAP, BFF, ONL, GRI, MKC, COU, SGF, CGI, MEM, HSV). 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 | 250° at 17 kt | −10 kt | 130 kt | 13 h 34 min | 5:37 pm CDT (22:37 UTC) | |
| 5,500 ft | 260° at 17 kt | −12 kt | 22 °C | 132 kt | 13 h 21 min | 5:24 pm CDT (22:24 UTC) |
| 7,500 ft | 250° at 14 kt | −10 kt | 8 °C | 130 kt | 13 h 34 min | 5:37 pm CDT (22:37 UTC) |
| 9,500 ft | 250° at 14 kt | −9 kt | 5 °C | 129 kt | 13 h 40 min | 5:43 pm CDT (22:43 UTC) |
| 11,500 ft | 240° at 15 kt | −8 kt | 2 °C | 128 kt | 13 h 46 min | 5:49 pm CDT (22:49 UTC) |
| 13,500 ft | 240° at 15 kt | −8 kt | -2 °C | 128 kt | 13 h 46 min | 5:49 pm CDT (22:49 UTC) |
| 15,500 ft | 240° at 15 kt | −8 kt | -6 °C | 128 kt | 13 h 46 min | 5:49 pm CDT (22:49 UTC) |
| 17,500 ft | 240° at 16 kt | −7 kt | -11 °C | 127 kt | 13 h 53 min | 5:56 pm CDT (22:56 UTC) |
| 18,000 ft FL180 | 240° at 16 kt | −7 kt | -12 °C | 127 kt | 13 h 53 min | 5:56 pm CDT (22:56 UTC) |
| 24,000 ft FL240 | 240° at 27 kt | −12 kt | -23 °C | 132 kt | 13 h 21 min | 5:24 pm CDT (22:24 UTC) |
| 30,000 ft FL300 | 260° at 35 kt | −26 kt | -33 °C | 146 kt | 12 h 05 min | 4:08 pm CDT (21:08 UTC) |
| 34,000 ft FL340 | 260° at 39 kt | −30 kt | -38 °C | 150 kt | 11 h 45 min | 3:48 pm CDT (20:48 UTC) |
| 39,000 ft FL390 | 260° at 39 kt | −31 kt | -46 °C | 151 kt | 11 h 41 min | 3:44 pm CDT (20:44 UTC) |
Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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 | 350/5 | 010/6 0° | 010/9 -4° | 010/27 -6° | 010/51 -15° | 360/58 -26° | 360/60 -41° | 350/55 -48° | 340/30 -45° |
| YKM | used from 50 nm out; 35 nm from the line | 360/6 | 360/11 -1° | 030/20 -7° | 040/21 -11° | 020/55 -18° | 010/84 -26° | 010/79 -40° | 010/45 -42° | 350/23 -42° |
| LWS | used from 149 nm out; 53 nm from the line | L/V | 340/5 -3° | L/V -6° | 040/7 -10° | 100/23 -22° | 180/30 -31° | 190/11 -34° | 200/11 -36° | 220/23 -40° |
| DLN | used from 349 nm out; 53 nm from the line | 190/10 -4° | 220/23 -4° | 210/21 -18° | 210/43 -28° | 210/60 -33° | 210/72 -37° | 210/67 -44° | ||
| BIL | used from 498 nm out; 93 nm from the line | 300/14 | 270/19 -2° | 260/26 -2° | 220/28 -13° | 210/51 -25° | 220/56 -33° | 220/61 -39° | 220/72 -45° | |
| LND | used from 598 nm out; 89 nm from the line | 240/10 3° | 240/30 0° | 220/42 -13° | 230/52 -23° | 220/54 -33° | 220/52 -36° | 220/53 -44° | ||
| RAP | used from 747 nm out; 97 nm from the line | 250/28 16° | 260/31 10° | 240/25 4° | 210/35 -10° | 200/45 -23° | 230/47 -31° | 230/47 -36° | 230/51 -46° | |
| BFF | used from 797 nm out; 61 nm from the line | 280/28 | 260/39 11° | 240/34 5° | 210/38 -11° | 210/52 -22° | 230/61 -31° | 230/61 -36° | 240/56 -45° | |
| ONL | used from 946 nm out; 111 nm from the line | 250/31 22° | 230/27 16° | 220/25 8° | 230/25 -9° | 220/29 -22° | 250/42 -33° | 250/48 -36° | 250/52 -46° | |
| GRI | used from 996 nm out; 79 nm from the line | 230/39 23° | 230/32 15° | 210/29 7° | 230/31 -8° | 230/43 -21° | 250/52 -31° | 260/59 -35° | 260/59 -46° | |
| MKC | used from 1196 nm out; 82 nm from the line | 240/49 | 240/21 20° | 220/19 13° | 230/21 6° | 260/26 -7° | 250/37 -19° | 270/66 -31° | 270/65 -38° | 280/60 -48° |
| COU | used from 1345 nm out; 65 nm from the line | 250/36 | 260/14 16° | 250/5 12° | 260/12 6° | 260/24 -7° | 260/35 -19° | 280/58 -31° | 280/62 -40° | 290/60 -49° |
| SGF | used from 1395 nm out; 56 nm from the line | 230/37 | 260/20 15° | 250/16 13° | 250/15 8° | 260/28 -7° | 250/31 -17° | 280/59 -31° | 280/59 -39° | 290/55 -50° |
| CGI | used from 1494 nm out; 63 nm from the line | 260/22 | 250/15 15° | 250/13 11° | 250/16 6° | 270/29 -7° | 280/30 -18° | 290/40 -31° | 290/55 -40° | 300/51 -51° |
| MEM | used from 1594 nm out; 73 nm from the line | 250/19 | 260/19 17° | 270/20 12° | 270/16 6° | 270/21 -6° | 290/27 -17° | 300/37 -30° | 300/49 -40° | 310/40 -51° |
| HSV | used from 1694 nm out; 45 nm from the line | 300/20 | 310/14 16° | 310/18 10° | 310/15 4° | 320/19 -5° | 290/16 -18° | 320/36 -32° | 320/47 -41° | 330/42 -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 |
|---|---|---|---|---|---|---|---|
| SEA Seattle, WA | departure | no report just now | 432 ft | ||||
| MWH Moses Lake, WA | 120 nm out, 15 nm northeast of the line, tower | no report just now | 1,188 ft | ||||
| LWS Lewiston, ID | 229 nm out, 8 nm southwest of the line, tower | no report just now | 1,442 ft | ||||
| EKS Ennis, MT | 458 nm out, 3 nm northeast of the line | no report just now | 5,432 ft | ||||
| COD Cody, WY | 578 nm out, 3 nm east of the line | no report just now | 5,102 ft | ||||
| LSK Lusk, WY | 807 nm out, 14 nm southwest of the line | no report just now | 4,966 ft | ||||
| BBW Broken Bow, NE | 1036 nm out, 13 nm north of the line | no report just now | 2,546 ft | ||||
| GRI Grand Island, NE | 1096 nm out, 17 nm northeast of the line, tower | no report just now | 1,847 ft | ||||
| OJC Olathe, KS | 1305 nm out, 8 nm southwest of the line, tower | no report just now | 1,096 ft | ||||
| TBN Fort Leonard Wood, MO | 1445 nm out, 3 nm north of the line, tower | no report just now | 1,159 ft | ||||
| MKL Jackson, TN | 1644 nm out, 15 nm southwest of the line, tower | no report just now | 434 ft | ||||
| HSV Huntsville, AL | destination | no report just now | 628 ft |
The highest airport on this list sits at 5,432 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At HSV when you get there the forecast at the estimated arrival, 3:44 pm CDT (20:44 UTC)
HSV has no terminal forecast; use the nearest airport that does.
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 6:25 pm PDT (01:25 UTC), at HSV 6:16 pm CDT (23:16 UTC) (civil twilight ends 6:41 pm CDT (23:41 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, Huntsville Intl-Carl T Jones Field.