Plan a flight · Sun 4:30 pm PDT (23:30 UTC)

Livermore Municipal to Harry Reid International LVK → LAS

334 nautical miles (385 statute miles) east on a straight line, true course 105°, about 089° magnetic at the departure end (variation 16E). At 120 knots that is 2 h 18 min at the quickest height in today's winds (39,000 ft, a 25-knot tailwind), arriving about 6:48 pm PDT (01:48 UTC), after sunset at the destination. Right now LVK is VFR, wind from the west-northwest (300°) at 12 knots, gusting to 19; LAS is VFR, wind from the south-southwest (210°) at 14 knots, gusting to 21. 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

AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 128 to 236 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the last 89 nm of the route.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 246 to 266 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 69 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 30 nm of the route.
AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Near the route, at the destination end.

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 LVK.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

E75L at 18,000 ft, 32 nm north, 4:24 pm PDT (23:24 UTC): moderate turbulence from 18,000 ft to 22,000 ft, remarks: mountain wave a 10-knot loss of airspeed entered by zoa fdcs. 157 nm along the route, 32 nm north of the line.
as filed, and in English
```
LOL UA /OV BIH300011/TM 2324/FL 180/TP E75L/TB MOD 180-220/RM MTN WAVE /-10 ENTERED BY ZOA FDCS AWC-WEB
```
Report
a routine report filed through LOL
Where
11 nm northwest (300°) of BIH
Time
23:24 UTC
Height
at 18,000 ft
Aircraft
E75L
Turbulence
moderate from 18,000 ft to 22,000 ft
Remarks
mountain wave a 10-knot loss of airspeed entered by zoa fdcs
B38M at 37,000 ft, 29 nm north, 3:25 pm PDT (22:25 UTC): -41 °C, wind 215° at 61 knots, remarks: produced by skypath. 236 nm along the route, 29 nm north of the line.
as filed, and in English
```
TPH UA /OV BTY308020 /TM 2225 /FL370 /TP B38M /TA M41 /WV 21561KT /RM PRODUCED BY SKYPATH
```
Report
a routine report filed through TPH
Where
20 nm northwest (308°) of BTY
Time
22:25 UTC
Height
at 37,000 ft
Aircraft
B38M
Temperature
−41 °C
Wind
from 215° at 61 knots
Remarks
produced by skypath
A20N at 23,000 ft, 45 nm south, 2:37 pm PDT (21:37 UTC): light rime icing from 21,000 ft to 23,000 ft, -21 °C, remarks: during the climb zlawc. 315 nm along the route, 45 nm south of the line.
as filed, and in English
```
CDC UA /OV LAS210050/TM 2137/FL230/TP A20N/TA M21/IC LGT RIME 210-230/RM DURC ZLAWC AWC-WEB
```
Report
a routine report filed through CDC
Where
50 nm southwest (210°) of LAS
Time
21:37 UTC
Height
at 23,000 ft
Aircraft
A20N
Temperature
−21 °C
Icing
light rime from 21,000 ft to 23,000 ft
Remarks
during the climb zlawc
CRJ2 at 18,500 ft, 34 nm south, 1:43 pm PDT (20:43 UTC): light rime icing, 2 °C, remarks: zlawc. At the destination end, 34 nm south of the line.
as filed, and in English
```
CDC UA /OV LAS200035/TM 2043/FL185/TP CRJ2/TA 02/IC LGT RIME/RM ZLAWC AWC-WEB
```
Report
a routine report filed through CDC
Where
35 nm south (200°) of LAS
Time
20:43 UTC
Height
at 18,500 ft
Aircraft
CRJ2
Temperature
2 °C
Icing
light rime
Remarks
zlawc
B752 at 17,500 ft, 39 nm east, 3:48 pm PDT (22:48 UTC): a broken layer from 17,500 ft to 18,500 ft; overcast, remarks: layer of precip west of niitz 25 nautical miles lgt-hvy rain zlawc. At the destination end, 39 nm east of the line.
as filed, and in English
```
LAS UA /OV BLD065025/TM 2248/FL175/TP B752/SK BKN175-TOP185/OVC/RM LAYER OF PRECIP W OF NIITZ 25 NM LGT-HVY RAIN /ZLAWC AWC-WEB
```
Report
a routine report filed through LAS
Where
BLD065025 C
Time
22:48 UTC
Height
at 17,500 ft
Aircraft
B752
Sky
a broken layer from 17,500 ft, tops 18,500 ft
Remarks
layer of precip west of niitz 25 nautical miles lgt-hvy rain zlawc
B73M at 11,000 ft, 5 nm north, 2:45 pm PDT (21:45 UTC): light rime icing, overcast above 11,000 ft. At the destination end, 5 nm north of the line.
as filed, and in English
```
LAS UA /OV LAS350005/TM 2145/FL110/TP B73M/SK 110 OVC/IC LGT RIME
```
Report
a routine report filed through LAS
Where
5 nm north (350°) of LAS
Time
21:45 UTC
Height
at 11,000 ft
Aircraft
B73M
Sky
at 11,000 ft overcast
Icing
light rime

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 4 forecast points nearest it (SFO, FAT, BIH, LAS). 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	190° at 9 kt	+1 kt	11 °C	119 kt	2 h 48 min	7:18 pm PDT (02:18 UTC)
7,500 ft	210° at 12 kt	−2 kt	6 °C	122 kt	2 h 44 min	7:14 pm PDT (02:14 UTC)
9,500 ft	220° at 17 kt	−6 kt	3 °C	126 kt	2 h 39 min	7:09 pm PDT (02:09 UTC)
11,500 ft	220° at 20 kt	−9 kt	-1 °C	129 kt	2 h 35 min	7:05 pm PDT (02:05 UTC)
13,500 ft	230° at 23 kt	−12 kt	-5 °C	132 kt	2 h 32 min	7:02 pm PDT (02:02 UTC)
15,500 ft	230° at 24 kt	−14 kt	-8 °C	134 kt	2 h 30 min	7:00 pm PDT (02:00 UTC)
17,500 ft	230° at 26 kt	−16 kt	-12 °C	136 kt	2 h 27 min	6:57 pm PDT (01:57 UTC)
18,000 ft FL180	240° at 27 kt	−17 kt	-13 °C	137 kt	2 h 26 min	6:56 pm PDT (01:56 UTC)
24,000 ft FL240	230° at 33 kt	−18 kt	-23 °C	138 kt	2 h 25 min	6:55 pm PDT (01:55 UTC)
30,000 ft FL300	220° at 51 kt	−21 kt	-27 °C	141 kt	2 h 22 min	6:52 pm PDT (01:52 UTC)
34,000 ft FL340	220° at 48 kt	−20 kt	-34 °C	140 kt	2 h 23 min	6:53 pm PDT (01:53 UTC)
39,000 ft FL390	230° at 47 kt	−25 kt	-44 °C	145 kt	2 h 18 min	6:48 pm PDT (01:48 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; 50 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°
FAT	used from 49 nm out; 46 nm from the line	180/7	170/9 7°	200/20 3°	210/27 -3°	240/27 -14°	230/38 -24°	220/57 -27°	230/42 -33°	230/41 -44°
BIH	used from 148 nm out; 28 nm from the line		L/V	210/14 6°	210/20 -2°	230/26 -14°	220/32 -24°	220/63 -27°	220/56 -35°	230/50 -44°
LAS	used from 246 nm out; 64 nm from the line		200/25 11°	230/22 5°	240/25 -1°	220/37 -12°	220/44 -21°	210/52 -27°	210/60 -34°	220/58 -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
LVK Livermore, CA	departure	VFR	from the west-northwest (300°) at 12 knots, gusting to 19	10+ mi	none	399 ft	3:53 pm PDT (22:53 UTC)
MOD Modesto, CA	39 nm out, 7 nm northeast of the line, tower	VFR	variable at 4 knots	10+ mi	none	99 ft	22:53 UTC
MER Atwater, CA	59 nm out, 4 nm southeast of the line, tower	VFR	from the south-southwest (210°) at 6 knots	10+ mi	none	190 ft	22:55 UTC
MPI Mariposa, CA	89 nm out, 12 nm north of the line	no report just now				2,254 ft
BTY Beatty, NV	246 nm out, 20 nm north of the line	no report just now				3,169 ft
LAS Las Vegas, NV	destination	VFR Sky: a few clouds at 7,500 feet, scattered clouds at 10,000 feet, a broken layer at 14,000 feet, a broken layer at 18,000 feet	from the south-southwest (210°) at 14 knots, gusting to 21	10+ mi	14,000 ft	2,183 ft	3:56 pm PDT (22:56 UTC)

The highest airport on this list sits at 3,169 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At LAS when you get there the forecast at the estimated arrival, 6:48 pm PDT (01:48 UTC)

Wind from the south-southwest at 14 knots, gusting to 24, visibility more than 6 miles, showers nearby, a few clouds at 6,000 feet, scattered clouds at 8,000 feet and more above VFR

The whole forecast for LAS

From Sun 5:00 pm PDT (00:00 UTC): wind from the south-southwest at 14 knots, gusting to 24, visibility more than 6 miles, showers nearby, a few clouds at 6,000 feet, scattered clouds at 8,000 feet and more above
From Sun 8:00 pm PDT (03:00 UTC): wind from the south at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 8,000 feet, a broken layer at 10,000 feet
From Mon 1:00 am PDT (08:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, a few clouds at 8,000 feet, a broken layer at 10,000 feet
From Mon 8:00 am PDT (15:00 UTC): wind from the south at 8 knots, visibility more than 6 miles, showers nearby, scattered clouds at 7,000 feet, a broken layer at 10,000 feet
From Mon 12:00 pm PDT (19:00 UTC): wind from the south-southwest at 15 knots, gusting to 25, visibility more than 6 miles, showers nearby, scattered clouds at 7,000 feet, a broken layer at 12,000 feet
From Mon 8:00 pm PDT (03:00 UTC): wind from the southwest at 10 knots, visibility more than 6 miles, a few clouds at 8,000 feet, scattered clouds at 10,000 feet

The forecast for LVK, the departure

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

Temporary flight restrictions on the line or within 25 nm of it

6/7231 Santa Clara, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 UTC 18 nm from the route, at the departure end · drones kept away from a public gathering · until 12 October · ZOA
6/6741 SAN FRANCISCO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 25 nm from the route, at the departure end · air shows/sports · until 11 October · ZOA
6/7094 45NM NE MERCED, CA, Sunday, October 4, 2026 through Tuesday, October 20, 2026 UTC 14 nm from the route, 98 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 20 October · ZOA
6/8808 Las Vegas, NV, Tuesday, October 13, 2026 Local on the route, at the destination end · security · starts Tuesday 13 October · ZLA

Daylight

Sunset at LVK 6:34 pm PDT (01:34 UTC), at LAS 6:08 pm PDT (01:08 UTC) (civil twilight ends 6:34 pm PDT (01:34 UTC)). At 120 knots the arrival at LAS is after sunset there (6:10 pm PDT (01:10 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

Radar now, the Pacific Southwest · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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: Livermore Municipal, Harry Reid International.