Napa County to Missoula Montana Airport APC → MSO
635 nautical miles (731 statute miles) northeast on a straight line, true course 032°, about 017° magnetic at the departure end (variation 15E). At 120 knots that is 4 h 19 min at the quickest height in today's winds (39,000 ft, a 27-knot tailwind), arriving about 10:29 am MDT (16:29 UTC). Right now APC is VFR, wind from the north (350°) at 3 knots; MSO is VFR, wind from the north-northeast (020°) at 3 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 whole route.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the last 169 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 169 nm of the route.
- 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 476 to 575 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, 476 nm along 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 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 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 6 forecast points nearest it (SAC, RNO, LKV, BOI, LWS, GPI). 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 | 340° at 5 kt | +3 kt | 0 °C | 117 kt | 5 h 26 min | 11:36 am MDT (17:36 UTC) |
| 7,500 ft | 340° at 5 kt | +3 kt | -4 °C | 117 kt | 5 h 26 min | 11:36 am MDT (17:36 UTC) |
| 9,500 ft | 310° at 5 kt | +1 kt | -6 °C | 119 kt | 5 h 20 min | 11:30 am MDT (17:30 UTC) |
| 11,500 ft | 310° at 5 kt | 0 | -9 °C | 120 kt | 5 h 18 min | 11:28 am MDT (17:28 UTC) |
| 13,500 ft | 320° at 7 kt | +2 kt | -12 °C | 118 kt | 5 h 23 min | 11:33 am MDT (17:33 UTC) |
| 15,500 ft | 340° at 8 kt | +5 kt | -15 °C | 115 kt | 5 h 31 min | 11:41 am MDT (17:41 UTC) |
| 17,500 ft | 340° at 11 kt | +7 kt | -18 °C | 113 kt | 5 h 37 min | 11:47 am MDT (17:47 UTC) |
| 18,000 ft FL180 | 350° at 11 kt | +8 kt | -18 °C | 112 kt | 5 h 40 min | 11:50 am MDT (17:50 UTC) |
| 24,000 ft FL240 | 350° at 20 kt | +14 kt | -27 °C | 106 kt | 5 h 59 min | 12:09 pm MDT (18:09 UTC) |
| 30,000 ft FL300 | 320° at 21 kt | +6 kt | -35 °C | 114 kt | 5 h 34 min | 11:44 am MDT (17:44 UTC) |
| 34,000 ft FL340 | 260° at 23 kt | −16 kt | -36 °C | 136 kt | 4 h 40 min | 10:50 am MDT (16:50 UTC) |
| 39,000 ft FL390 | 230° at 28 kt | −27 kt | -41 °C | 147 kt | 4 h 19 min | 10:29 am MDT (16:29 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SAC | used from 0 nm out; 24 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° |
| RNO | used from 99 nm out; 57 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° | |
| LKV | used from 198 nm out; 60 nm from the line | 010/10 -8° | 360/20 -11° | 360/58 -19° | 360/92 -25° | 350/69 -37° | 310/34 -37° | 240/26 -41° | ||
| BOI | used from 347 nm out; 68 nm from the line | 320/11 1° | 280/8 -5° | 220/14 -11° | 200/60 -19° | 190/66 -31° | 210/46 -32° | 220/50 -33° | 220/43 -39° | |
| LWS | used from 496 nm out; 79 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° |
| GPI | used from 595 nm out; 100 nm from the line | 090/8 -4° | 140/7 -7° | 090/10 -8° | 110/10 -19° | 210/25 -30° | 200/24 -40° | 210/31 -39° | 210/35 -42° |
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 north (350°) at 3 knots | 8 mi | none | 35 ft | 4:54 am PDT (11:54 UTC) |
| SMF Sacramento, CA | 40 nm out, 12 nm east of the line, tower | VFR Sky: a few clouds at 11,000 feet | from the south-southwest (210°) at 3 knots | 10+ mi | none | 26 ft | 11:53 UTC |
| OVE Oroville, CA | 79 nm out, 15 nm northwest of the line | VFR | from the south-southwest (200°) at 4 knots | 10+ mi | none | 194 ft | 11:53 UTC |
| SVE Susanville, CA | 149 nm out, 4 nm north of the line | VFR Sky: a few clouds at 7,500 feet, scattered clouds at 9,000 feet | calm | 10+ mi | none | 4,149 ft | 11:55 UTC |
| REO Rome, OR | 327 nm out, 23 nm southeast of the line | reported, no category | from the south (170°) at 4 knots | none | 4,053 ft | 11:52 UTC | |
| ONO Ontario, OR | 427 nm out, 7 nm south of the line | VFR Sky: overcast at 9,500 feet | from the west (270°) at 9 knots | 10+ mi | 9,500 ft | 2,193 ft | 11:53 UTC |
| MYL Mc Call, ID | 486 nm out, 6 nm southeast of the line | marginal VFR Sky: overcast at 1,100 feet | calm | 10+ mi | 1,100 ft | 5,024 ft | 11:51 UTC |
| HRF Hamilton, MT | 605 nm out, 23 nm southeast of the line | VFR Sky: overcast at 6,000 feet | calm | 10+ mi | 6,000 ft | 3,635 ft | 11:55 UTC |
| MSO Missoula, MT | destination | VFR Sky: overcast at 7,500 feet | from the north-northeast (020°) at 3 knots | 10+ mi | 7,500 ft | 3,205 ft | 5:53 am MDT (11:53 UTC) |
The highest airport on this list sits at 5,024 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At MSO when you get there the forecast at the estimated arrival, 10:29 am MDT (16:29 UTC)
Wind from the east-southeast at 4 knots, visibility more than 6 miles, overcast at 5,000 feet VFR
The whole forecast for MSO
- From Mon 6:00 am MDT (12:00 UTC): wind from the east at 2 knots, visibility more than 6 miles, showers nearby, scattered clouds at 1,500 feet, a broken layer at 4,000 feet
- From Mon 8:00 am MDT (14:00 UTC): wind from the east-southeast at 4 knots, visibility more than 6 miles, overcast at 5,000 feet
- From Mon 2:00 pm MDT (20:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, overcast at 10,000 feet
The forecast for APC, the departure
- From Mon 5:00 am PDT (12:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
Temporary flight restrictions on the line or within 25 nm of it
- 6/3475 BEALE AFB, CA, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local on the route, 60 nm along the route · security · until 1 November · ZOA
- 6/8927 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 605 nm along the route · a VIP movement · starts Wednesday 14 October · ZSE
- 6/8923 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 605 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC
Daylight
Sunset at APC 6:34 pm PDT (01:34 UTC), at MSO 6:53 pm MDT (00:53 UTC) (civil twilight ends 7:23 pm MDT (01:23 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, Missoula Montana Airport.