Fresno Yosemite International to Lewiston/Nez Perce County FAT → LWS
589 nautical miles (678 statute miles) north on a straight line, true course 011°, about 358° magnetic at the departure end (variation 13E). At 120 knots that is 4 h at the quickest height in today's winds (39,000 ft, a 27-knot tailwind), arriving about 8:25 am PDT (15:25 UTC). Right now FAT is VFR, wind from the east-southeast (120°) at 11 knots; LWS is VFR, wind calm. 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 SIERRA 2E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 80 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 120 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the last 90 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 559 to 559 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 FAT.
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 7 forecast points nearest it (FAT, BIH, RNO, BAM, LKV, BOI, LWS). 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 | 340° at 4 kt | +3 kt | 1 °C | 117 kt | 5 h 02 min | 9:27 am PDT (16:27 UTC) |
| 6,500 ft | 320° at 4 kt | +2 kt | -1 °C | 118 kt | 4 h 59 min | 9:24 am PDT (16:24 UTC) |
| 8,500 ft | 290° at 5 kt | 0 | -4 °C | 120 kt | 4 h 54 min | 9:19 am PDT (16:19 UTC) |
| 10,500 ft | 240° at 7 kt | −4 kt | -7 °C | 124 kt | 4 h 45 min | 9:10 am PDT (16:10 UTC) |
| 12,500 ft | 220° at 11 kt | −9 kt | -11 °C | 129 kt | 4 h 34 min | 8:59 am PDT (15:59 UTC) |
| 14,500 ft | 220° at 13 kt | −12 kt | -13 °C | 132 kt | 4 h 28 min | 8:53 am PDT (15:53 UTC) |
| 16,500 ft | 210° at 16 kt | −15 kt | -17 °C | 135 kt | 4 h 22 min | 8:47 am PDT (15:47 UTC) |
| 18,000 ft FL180 | 210° at 18 kt | −18 kt | -19 °C | 138 kt | 4 h 16 min | 8:41 am PDT (15:41 UTC) |
| 24,000 ft FL240 | 240° at 12 kt | −8 kt | -27 °C | 128 kt | 4 h 36 min | 9:01 am PDT (16:01 UTC) |
| 30,000 ft FL300 | 250° at 20 kt | −11 kt | -32 °C | 131 kt | 4 h 30 min | 8:55 am PDT (15:55 UTC) |
| 34,000 ft FL340 | 230° at 31 kt | −23 kt | -35 °C | 143 kt | 4 h 07 min | 8:32 am PDT (15:32 UTC) |
| 39,000 ft FL390 | 230° at 33 kt | −27 kt | -41 °C | 147 kt | 4 h | 8:25 am PDT (15:25 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| FAT | used from 0 nm out; 25 nm from the line | 140/11 | 180/15 3° | 150/14 -3° | 200/14 -6° | 240/17 -16° | 320/25 -23° | 270/22 -31° | 240/29 -37° | 230/36 -44° |
| BIH | used from 50 nm out; 63 nm from the line | L/V | 020/6 0° | 140/7 -7° | 210/31 -16° | 230/34 -26° | 220/43 -30° | 220/52 -36° | 220/46 -43° | |
| RNO | used from 100 nm out; 49 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° | |
| BAM | used from 249 nm out; 86 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° | ||
| LKV | used from 299 nm out; 92 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 349 nm out; 92 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 499 nm out; 65 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° |
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 |
|---|---|---|---|---|---|---|---|
| FAT Fresno, CA | departure | VFR Sky: a broken layer at 6,000 feet | from the east-southeast (120°) at 11 knots | 10+ mi | 6,000 ft | 335 ft | 3:53 am PDT (10:53 UTC) |
| MPI Mariposa, CA | 40 nm out, 23 nm west of the line | no report just now | 2,254 ft | ||||
| SPZ Silver Springs, NV | 160 nm out, 9 nm west of the line | no report just now | 4,265 ft | ||||
| LOL Lovelock, NV | 200 nm out, 15 nm east of the line | VFR Sky: overcast at 11,000 feet | from the northeast (040°) at 9 knots | 10+ mi | 11,000 ft | 3,907 ft | 10:53 UTC |
| REO Rome, OR | 359 nm out, 13 nm east of the line | reported, no category | from the southeast (140°) at 8 knots | none | 4,053 ft | 10:52 UTC | |
| JSY Joseph, OR | 529 nm out, 4 nm southeast of the line | VFR | from the south-southwest (210°) at 4 knots | 10+ mi | none | 4,126 ft | 14:30 UTC |
| LWS Lewiston, ID | destination | VFR Sky: a broken layer at 7,000 feet | calm | 10+ mi | 7,000 ft | 1,442 ft | 3:56 am PDT (10:56 UTC) |
The highest airport on this list sits at 4,265 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At LWS when you get there the forecast at the estimated arrival, 8:25 am PDT (15:25 UTC)
Wind light and variable, visibility more than 6 miles, light rain showers, a broken layer at 4,500 feet, overcast at 6,000 feet VFR
30% chance between Mon 8:00 am PDT (15:00 UTC) and 10:00 am PDT (17:00 UTC): light rain showers, a broken layer at 3,000 feet marginal VFR
The whole forecast for LWS
- From Sun 11:00 pm PDT (06:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 4,500 feet, overcast at 6,000 feet
- From Mon 5:00 am PDT (12:00 UTC): wind light and variable, visibility more than 6 miles, light rain showers, a broken layer at 4,500 feet, overcast at 6,000 feet
- 30% chance between Mon 8:00 am PDT (15:00 UTC) and 10:00 am PDT (17:00 UTC): light rain showers, a broken layer at 3,000 feet
- From Mon 10:00 am PDT (17:00 UTC): wind from the west at 4 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, a broken layer at 3,500 feet
- From Mon 8:00 pm PDT (03:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 10,000 feet
The forecast for FAT, the departure
- From Mon 5:00 am PDT (12:00 UTC): wind from the east-southeast at 13 knots, visibility more than 6 miles, a broken layer at 6,000 feet
- From Mon 11:00 am PDT (18:00 UTC): wind from the south-southeast at 6 knots, visibility more than 6 miles, a broken layer at 10,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/7094 45NM NE MERCED, CA, Sunday, October 4, 2026 through Tuesday, October 20, 2026 UTC on the route, 50 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 20 October · ZOA
Daylight
Sunset at FAT 6:25 pm PDT (01:25 UTC), at LWS 6:05 pm PDT (01:05 UTC) (civil twilight ends 6:35 pm PDT (01:35 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: Fresno Yosemite International, Lewiston/Nez Perce County.