Washington Dulles International to Napa County IAD → APC
2,083 nautical miles (2,397 statute miles) west on a straight line, true course 283°, about 293° magnetic at the departure end (variation 10W). At 120 knots that is 20 h 13 min at the quickest height in today's winds (6,500 ft, a 17-knot headwind), arriving about 3:17 am PDT (10:17 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: 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 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the route from 10 to 100 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 50 to 179 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 route from 80 to 319 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 757 to 917 nm out.
- 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 1166 to 1505 nm out.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 1265 to 1375 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1315 to 1883 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1375 to 1893 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1843 to 2073 nm out.
- AIRMET SIERRA 2E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1953 to 1983 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 IAD.
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 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 (EKN, CMH, CVG, IND, SPI, BRL, DSM, OMA, GRI, GLD, BFF, DEN, GJT, SLC, ELY, BAM, RNO, SAC). 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 | 260° at 18 kt | +18 kt | 16 °C | 102 kt | 20 h 25 min | 3:29 am PDT (10:29 UTC) |
| 6,500 ft | 270° at 16 kt | +17 kt | 15 °C | 103 kt | 20 h 13 min | 3:17 am PDT (10:17 UTC) |
| 8,500 ft | 260° at 16 kt | +17 kt | 9 °C | 103 kt | 20 h 13 min | 3:17 am PDT (10:17 UTC) |
| 10,500 ft | 250° at 18 kt | +18 kt | 4 °C | 102 kt | 20 h 25 min | 3:29 am PDT (10:29 UTC) |
| 12,500 ft | 250° at 20 kt | +20 kt | 0 °C | 100 kt | 20 h 50 min | 3:54 am PDT (10:54 UTC) |
| 14,500 ft | 250° at 21 kt | +22 kt | -4 °C | 98 kt | 21 h 15 min | 4:19 am PDT (11:19 UTC) |
| 16,500 ft | 250° at 23 kt | +23 kt | -8 °C | 97 kt | 21 h 28 min | 4:32 am PDT (11:32 UTC) |
| 18,000 ft FL180 | 260° at 23 kt | +25 kt | -11 °C | 95 kt | 21 h 56 min | 5:00 am PDT (12:00 UTC) |
| 24,000 ft FL240 | 260° at 29 kt | +30 kt | -22 °C | 90 kt | 23 h 09 min | 6:13 am PDT (13:13 UTC) |
| 30,000 ft FL300 | 260° at 39 kt | +41 kt | -32 °C | 79 kt | 26 h 22 min | 9:26 am PDT (16:26 UTC) |
| 34,000 ft FL340 | 260° at 47 kt | +50 kt | -38 °C | 70 kt | 29 h 45 min | 12:49 pm PDT (19:49 UTC) |
| 39,000 ft FL390 | 260° at 46 kt | +49 kt | -47 °C | 71 kt | 29 h 20 min | 12:24 pm PDT (19:24 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| EKN | used from 0 nm out; 88 nm from the line | 330/20 10° | 350/29 7° | 340/32 2° | 340/44 -8° | 350/50 -21° | 350/63 -35° | 340/69 -40° | 330/42 -50° | |
| CMH | used from 199 nm out; 37 nm from the line | 320/12 | 340/26 15° | 340/22 9° | 320/24 3° | 320/32 -7° | 320/36 -20° | 330/42 -35° | 320/59 -44° | 320/57 -50° |
| CVG | used from 299 nm out; 59 nm from the line | 300/19 | 310/23 15° | 320/20 9° | 310/18 3° | 300/26 -6° | 290/36 -19° | 310/32 -34° | 310/53 -43° | 310/61 -51° |
| IND | used from 349 nm out; 48 nm from the line | 270/22 | 290/19 15° | 270/19 8° | 270/18 4° | 290/28 -7° | 280/35 -20° | 270/37 -34° | 300/51 -42° | 300/61 -51° |
| SPI | used from 498 nm out; 59 nm from the line | 260/28 | 250/22 15° | 250/14 9° | 260/20 6° | 280/27 -7° | 280/34 -19° | 280/48 -32° | 280/59 -41° | 300/60 -49° |
| BRL | used from 598 nm out; 19 nm from the line | 250/32 | 250/19 17° | 260/15 11° | 270/16 3° | 290/23 -7° | 260/42 -20° | 270/52 -34° | 280/63 -39° | 290/64 -48° |
| DSM | used from 697 nm out; 59 nm from the line | 250/47 | 260/25 20° | 240/19 11° | 240/31 5° | 250/26 -9° | 260/38 -20° | 260/47 -34° | 270/58 -37° | 270/61 -47° |
| OMA | used from 797 nm out; 46 nm from the line | 230/47 | 240/33 21° | 230/22 13° | 220/27 5° | 240/35 -8° | 250/43 -21° | 260/47 -33° | 260/59 -36° | 270/58 -46° |
| GRI | used from 897 nm out; 44 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° | |
| GLD | used from 1046 nm out; 97 nm from the line | 260/37 | 260/25 14° | 250/27 8° | 230/36 -8° | 230/49 -21° | 250/71 -30° | 260/82 -36° | 250/73 -48° | |
| BFF | used from 1146 nm out; 78 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° | |
| DEN | used from 1196 nm out; 59 nm from the line | 270/24 11° | 230/13 5° | 230/48 -8° | 230/46 -20° | 230/63 -30° | 240/78 -36° | 240/78 -48° | ||
| GJT | used from 1345 nm out; 100 nm from the line | 220/26 6° | 230/39 0° | 220/55 -13° | 230/60 -23° | 230/78 -31° | 230/80 -35° | 230/74 -44° | ||
| SLC | used from 1495 nm out; 81 nm from the line | 200/16 | 210/23 4° | 220/34 -3° | 210/40 -16° | 220/66 -23° | 220/64 -31° | 220/57 -36° | 220/50 -43° | |
| ELY | used from 1644 nm out; 62 nm from the line | 210/34 1° | 220/40 -4° | 220/39 -17° | 210/51 -24° | 220/65 -30° | 220/60 -37° | 220/56 -44° | ||
| BAM | used from 1794 nm out; 80 nm from the line | 280/9 -2° | 260/18 -8° | 190/47 -19° | 200/50 -29° | 210/56 -29° | 220/54 -34° | 220/45 -42° | ||
| RNO | used from 1843 nm out; 93 nm from the line | 010/6 | 270/12 -3° | 220/26 -10° | 280/13 -19° | 350/44 -24° | 320/30 -32° | 260/22 -36° | 240/24 -42° | |
| SAC | used from 1993 nm out; 25 nm from the line | L/V | L/V 4° | 340/9 -4° | 340/22 -8° | 360/71 -12° | 360/82 -23° | 350/58 -37° | 310/30 -40° | 270/25 -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 |
|---|---|---|---|---|---|---|---|
| IAD Washington, DC | departure | no report just now | 312 ft | ||||
| CKB Clarksburg, WV | 130 nm out, 7 nm south of the line, tower | no report just now | 1,223 ft | ||||
| LCK Columbus, OH | 259 nm out, 0 nm northeast of the line, tower | no report just now | 743 ft | ||||
| BMI Bloomington/Normal, IL | 538 nm out, 2 nm northeast of the line, tower | no report just now | 871 ft | ||||
| TVK Centerville, IA | 717 nm out, 1 nm west of the line | no report just now | 1,023 ft | ||||
| LNK Lincoln, NE | 897 nm out, 4 nm northeast of the line, tower | no report just now | 1,218 ft | ||||
| STK Sterling, CO | 1186 nm out, 7 nm southwest of the line | no report just now | 4,037 ft | ||||
| FNL Fort Collins/Loveland, CO | 1275 nm out, 10 nm southeast of the line, tower | no report just now | 5,020 ft | ||||
| PVU Provo, UT | 1574 nm out, 14 nm north of the line, tower | no report just now | 4,496 ft | ||||
| GAB Gabbs, NV | 1873 nm out, 9 nm south of the line | no report just now | 4,699 ft | ||||
| SAC Sacramento, CA | 2043 nm out, 8 nm north of the line, tower | no report just now | 23 ft | ||||
| APC Napa, CA | destination | no report just now | 35 ft |
The highest airport on this list sits at 5,020 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At APC when you get there the forecast at the estimated arrival, 3:17 am PDT (10:17 UTC)
APC has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 4/9383 WASHINGTON, DC., USA 8 nm from the route, at the departure end · security · ZDC
- 6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local 4 nm from the route, at the departure end · a VIP movement · today · ZDC
Daylight
Sunset at IAD 6:36 pm EDT (22:36 UTC), at APC 6:34 pm PDT (01:34 UTC) (civil twilight ends 7:00 pm PDT (02:00 UTC)). At 120 knots the arrival at APC is before sunrise there (7:15 am PDT (14:15 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: Washington Dulles International, Napa County.