Seattle-Tacoma International to James M Cox Dayton International SEA → DAY
1,696 nautical miles (1,952 statute miles) east on a straight line, true course 091°, about 075° magnetic at the departure end (variation 16E). At 120 knots that is 10 h 09 min at the quickest height in today's winds (39,000 ft, a 47-knot tailwind), arriving about 7:32 am EDT (11:32 UTC), after sunset at the destination. 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: 2 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 3W: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 40 knots, until 7:55 pm PDT (02:55 UTC). Over the route from 619 to 669 nm out.
as issued
WSUS33 KKCI 120055 MKCW WST 120055 CONVECTIVE SIGMET 3W VALID UNTIL 0255Z MT WY FROM 10WSW MLS-70E DDY-20N LAR-50E BPI-30NE BIL-10WSW MLS AREA TS MOV FROM 22040KT. TOPS TO FL310.
- AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the route from 120 to 349 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 200 to 579 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 259 to 918 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 259 to 788 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 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 20:00–03:00 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 17 forecast points nearest it (SEA, YKM, GEG, LWS, GPI, GTF, BIL, MLS, DIK, RAP, PIR, ABR, FSD, MCW, DBQ, JOT, FWA). 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 | 230° at 9 kt | −3 kt | 123 kt | 13 h 47 min | 11:10 am EDT (15:10 UTC) | |
| 5,500 ft | 080° at 2 kt | +3 kt | 6 °C | 117 kt | 14 h 30 min | 11:53 am EDT (15:53 UTC) |
| 7,500 ft | light and variable | 0 | 8 °C | 120 kt | 14 h 08 min | 11:31 am EDT (15:31 UTC) |
| 9,500 ft | 230° at 4 kt | −2 kt | 3 °C | 122 kt | 13 h 54 min | 11:17 am EDT (15:17 UTC) |
| 11,500 ft | 230° at 8 kt | −5 kt | 1 °C | 125 kt | 13 h 34 min | 10:57 am EDT (14:57 UTC) |
| 13,500 ft | 240° at 11 kt | −7 kt | -3 °C | 127 kt | 13 h 21 min | 10:44 am EDT (14:44 UTC) |
| 15,500 ft | 240° at 13 kt | −10 kt | -7 °C | 130 kt | 13 h 03 min | 10:26 am EDT (14:26 UTC) |
| 17,500 ft | 240° at 16 kt | −12 kt | -11 °C | 132 kt | 12 h 51 min | 10:14 am EDT (14:14 UTC) |
| 18,000 ft FL180 | 240° at 17 kt | −13 kt | -12 °C | 133 kt | 12 h 45 min | 10:08 am EDT (14:08 UTC) |
| 24,000 ft FL240 | 250° at 24 kt | −20 kt | -23 °C | 140 kt | 12 h 07 min | 9:30 am EDT (13:30 UTC) |
| 30,000 ft FL300 | 250° at 30 kt | −26 kt | -36 °C | 146 kt | 11 h 37 min | 9:00 am EDT (13:00 UTC) |
| 34,000 ft FL340 | 250° at 38 kt | −34 kt | -43 °C | 154 kt | 11 h 01 min | 8:24 am EDT (12:24 UTC) |
| 39,000 ft FL390 | 270° at 48 kt | −47 kt | -48 °C | 167 kt | 10 h 09 min | 7:32 am EDT (11:32 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SEA | used from 0 nm out; 25 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° |
| YKM | used from 50 nm out; 50 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° |
| GEG | used from 100 nm out; 71 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° | |
| LWS | used from 249 nm out; 75 nm from the line | 010/5 | 050/14 -2° | 040/12 -6° | 160/7 -10° | 190/30 -22° | 200/54 -27° | 200/48 -35° | 210/40 -37° | 230/32 -41° |
| GPI | used from 299 nm out; 76 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° | |
| GTF | used from 349 nm out; 80 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° | |
| BIL | used from 499 nm out; 61 nm from the line | 080/24 | 130/14 -1° | 180/33 0° | 210/43 -10° | 220/58 -21° | 200/55 -36° | 220/75 -44° | 240/83 -48° | |
| MLS | used from 599 nm out; 57 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° | |
| DIK | used from 748 nm out; 81 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° | |
| RAP | used from 798 nm out; 83 nm from the line | 120/15 12° | 180/22 11° | 220/26 5° | 230/35 -9° | 240/40 -22° | 240/50 -37° | 240/51 -41° | 240/47 -47° | |
| PIR | used from 848 nm out; 68 nm from the line | L/V 17° | 230/13 12° | 220/22 6° | 250/31 -9° | 250/34 -21° | 240/50 -35° | 230/61 -43° | 240/62 -51° | |
| ABR | used from 998 nm out; 64 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° |
| FSD | used from 1048 nm out; 35 nm from the line | 200/16 | 220/20 17° | 240/26 13° | 230/19 6° | 240/25 -9° | 240/28 -20° | 250/39 -33° | 250/44 -43° | 260/63 -52° |
| MCW | used from 1148 nm out; 71 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° |
| DBQ | used from 1297 nm out; 45 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° |
| JOT | used from 1447 nm out; 21 nm from the line | 230/11 | 290/12 16° | 300/19 10° | 320/19 4° | 300/17 -9° | 330/31 -20° | 320/49 -37° | 320/53 -45° | 320/67 -49° |
| FWA | used from 1547 nm out; 66 nm from the line | 350/9 | 350/24 15° | 360/25 9° | 360/29 4° | 350/31 -10° | 340/39 -22° | 330/40 -37° | 320/38 -43° | 320/48 -48° |
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, 10 nm south of the line, tower | no report just now | 1,188 ft | ||||
| MSO Missoula, MT | 339 nm out, 7 nm southwest of the line, tower | no report just now | 3,205 ft | ||||
| HLN Helena, MT | 429 nm out, 13 nm southwest of the line, tower | no report just now | 3,877 ft | ||||
| RPX Roundup, MT | 569 nm out, 5 nm north of the line | no report just now | 3,490 ft | ||||
| MKA Miller, SD | 988 nm out, 5 nm southwest of the line | no report just now | 1,569 ft | ||||
| HON Huron, SD | 1018 nm out, 3 nm south of the line | no report just now | 1,288 ft | ||||
| ALO Waterloo, IA | 1297 nm out, 16 nm southwest of the line, tower | no report just now | 873 ft | ||||
| DBQ Dubuque, IA | 1367 nm out, 6 nm northeast of the line, tower | no report just now | 1,076 ft | ||||
| GUS Peru, IN | 1597 nm out, 1 nm south of the line, tower | no report just now | 810 ft | ||||
| DAY Dayton, OH | destination | no report just now | 1,009 ft |
The highest airport on this list sits at 3,877 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At DAY when you get there the forecast at the estimated arrival, 7:32 am EDT (11:32 UTC)
DAY 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 6:27 pm PDT (01:27 UTC), at DAY 7:02 pm EDT (23:02 UTC) (civil twilight ends 7:29 pm EDT (23:29 UTC)). At 120 knots the arrival at DAY is before sunrise there (7:43 am EDT (11:43 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, James M Cox Dayton International.