Napa County to Livermore Municipal APC → LVK
38 nautical miles (44 statute miles) southeast on a straight line, true course 145°, about 130° magnetic at the departure end (variation 15E). At 120 knots that is 15 min at the quickest height in today's winds (24,000 ft, a 28-knot tailwind), arriving about 4:48 pm PDT (23:48 UTC). Right now APC is VFR, wind from the south (190°) at 18 knots, gusting to 24; LVK is VFR, wind from the west-northwest (300°) at 12 knots, gusting to 19. 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
No SIGMET or AIRMET covers any part of this route right now.
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 APC.
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 1 forecast point nearest it (SFO). 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 | 220° at 9 kt | +2 kt | 118 kt | 19 min | 4:52 pm PDT (23:52 UTC) | |
| 5,500 ft | 220° at 2 kt | 0 | 120 kt | 19 min | 4:52 pm PDT (23:52 UTC) | |
| 7,500 ft | 280° at 4 kt | −2 kt | 3 °C | 122 kt | 19 min | 4:52 pm PDT (23:52 UTC) |
| 9,500 ft | 280° at 8 kt | −6 kt | 0 °C | 126 kt | 18 min | 4:51 pm PDT (23:51 UTC) |
| 11,500 ft | 270° at 14 kt | −8 kt | -2 °C | 128 kt | 18 min | 4:51 pm PDT (23:51 UTC) |
| 13,500 ft | 280° at 17 kt | −11 kt | -6 °C | 131 kt | 17 min | 4:50 pm PDT (23:50 UTC) |
| 15,500 ft | 280° at 19 kt | −15 kt | -9 °C | 135 kt | 17 min | 4:50 pm PDT (23:50 UTC) |
| 17,500 ft | 290° at 22 kt | −18 kt | -13 °C | 138 kt | 17 min | 4:50 pm PDT (23:50 UTC) |
| 18,000 ft FL180 | 290° at 23 kt | −19 kt | -14 °C | 139 kt | 16 min | 4:49 pm PDT (23:49 UTC) |
| 24,000 ft FL240 | 310° at 29 kt | −28 kt | -24 °C | 148 kt | 15 min | 4:48 pm PDT (23:48 UTC) |
| 30,000 ft FL300 | 280° at 26 kt | −18 kt | -28 °C | 138 kt | 17 min | 4:50 pm PDT (23:50 UTC) |
| 34,000 ft FL340 | 250° at 30 kt | −8 kt | -34 °C | 128 kt | 18 min | 4:51 pm PDT (23:51 UTC) |
| 39,000 ft FL390 | 250° at 36 kt | −9 kt | -43 °C | 129 kt | 18 min | 4:51 pm PDT (23:51 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SFO | used from 0 nm out; 25 nm from the line | 220/11 | L/V 5° | 280/7 1° | 270/15 -3° | 290/23 -14° | 310/29 -24° | 280/26 -28° | 250/30 -34° | 250/36 -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 |
|---|---|---|---|---|---|---|---|
| APC Napa, CA | departure | VFR | from the south (190°) at 18 knots, gusting to 24 | 10+ mi | none | 35 ft | 3:54 pm PDT (22:54 UTC) |
| CCR Concord, CA | 19 nm out, 2 nm north of the line, tower | VFR | from the south-southwest (210°) at 13 knots | 10+ mi | none | 25 ft | 22:53 UTC |
| LVK Livermore, CA | destination | VFR | from the west-northwest (300°) at 12 knots, gusting to 19 | 10+ mi | none | 399 ft | 3:53 pm PDT (22:53 UTC) |
The highest airport on this list sits at 399 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At LVK when you get there the forecast at the estimated arrival, 4:48 pm PDT (23:48 UTC)
The forecast starts later; its first period says: Wind from the west at 12 knots, visibility more than 6 miles, clear skies VFR
The whole forecast for LVK
- From Sun 5:00 pm PDT (00:00 UTC): wind from the west at 12 knots, visibility more than 6 miles, clear skies
- From Sun 10:00 pm PDT (05:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
- From Mon 1:00 pm PDT (20:00 UTC): wind from the west at 7 knots, visibility more than 6 miles, clear skies
The forecast for APC, the departure
- From Sun 5:00 pm PDT (00:00 UTC): wind from the south at 15 knots, visibility more than 6 miles, clear skies
- From Sun 8:00 pm PDT (03:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, clear skies
- From Mon 12:00 pm PDT (19:00 UTC): wind from the southwest at 8 knots, visibility more than 6 miles, clear skies
Temporary flight restrictions on the line or within 25 nm of it
- 6/7455 SAN FRANCISCO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 16 nm from the route, 19 nm along the route · security · until 11 October · ZOA
- 6/6741 SAN FRANCISCO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 15 nm from the route, 19 nm along the route · air shows/sports · until 11 October · ZOA
- 6/7231 Santa Clara, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 UTC 18 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZOA
Daylight
Sunset at APC 6:35 pm PDT (01:35 UTC), at LVK 6:34 pm PDT (01:34 UTC) (civil twilight ends 7:00 pm PDT (02:00 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: Napa County, Livermore Municipal.