Robert Gray Army Airfield to San Francisco International GRK → SFO
1,274 nautical miles (1,467 statute miles) northwest on a straight line, true course 295°, about 291° magnetic at the departure end (variation 4E). At 120 knots that is 10 h 48 min at the quickest height in today's winds (8,500 ft, a 2-knot headwind), arriving about 6:50 pm PDT (01:50 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: 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 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 528 to 807 nm out.
- AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 548 to 807 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 617 to 866 nm out.
- AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 737 to 846 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, 896 nm along the route.
- AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 966 to 1045 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 229 nm of the route.
- AIRMET SIERRA 2E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1105 to 1155 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 GRK.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- A321 at 19,000 ft, 18 nm southwest, 7:39 am CDT (12:39 UTC): moderate chop turbulence, remarks: zlawc. 846 nm along the route, 18 nm southwest of the line.
as filed, and in English
CDC UA /OV PGS275017/TM 1239/FL190/TP A321/TB MOD CHOP/RM ZLAWC AWC-WEB
- Report
- a routine report filed through CDC
- Where
- 17 nm west (275°) of PGS
- Time
- 12:39 UTC
- Height
- at 19,000 ft
- Aircraft
- A321
- Turbulence
- moderate chop
- Remarks
- zlawc
- P28A descending, 25 nm south, 9:58 am CDT (14:58 UTC): overcast from 1,800 ft to 2,300 ft. At the departure end, 25 nm south of the line.
as filed, and in English
GTU UA /OV 4NM N/TM 1458/FLDURD/TP P28A/SK OVC018 - TOP023
- Report
- a routine report filed through GTU
- Where
- 4NM north
- Time
- 14:58 UTC
- Height
- during the descent
- Aircraft
- P28A
- Sky
- overcast from 1,800 ft, tops 2,300 ft
- A321 at 4,500 ft, 43 nm south, 8:15 am CDT (13:15 UTC): remarks: on final during the descent. At the departure end, 43 nm south of the line.
as filed, and in English
AUS UA /OV 10N KAUS/TM 1315/FL045/TP A321/SK T045/RM ON FINAL DURD
- Report
- a routine report filed through AUS
- Where
- 10N KAUS
- Time
- 13:15 UTC
- Height
- at 4,500 ft
- Aircraft
- A321
- Sky
- T045
- Remarks
- on final during the descent
- PC12 descending, 25 nm south, 8:02 am CDT (13:02 UTC): a broken layer above 2,200 ft. At the departure end, 25 nm south of the line.
as filed, and in English
GTU UA /OV 5NM N/TM 1302/FLDURD/TP PC12/SK BKN022 - TOPUNK
- Report
- a routine report filed through GTU
- Where
- 5NM north
- Time
- 13:02 UTC
- Height
- during the descent
- Aircraft
- PC12
- Sky
- BKN022 topunk
- BE20 climbing, 25 nm south, 7:22 am CDT (12:22 UTC): overcast from 2,800 ft to 4,000 ft, remarks: higher layer above. At the departure end, 25 nm south of the line.
as filed, and in English
GTU UA /OV 3NM SW/TM 1222/FLDURC/TP BE20/SK OVC028 - TOP040/RM HIGHER LAYER ABOVE
- Report
- a routine report filed through GTU
- Where
- 3NM southwest
- Time
- 12:22 UTC
- Height
- during the climb
- Aircraft
- BE20
- Sky
- overcast from 2,800 ft, tops 4,000 ft
- Remarks
- higher layer above
- B738 at 36,000 ft, 4 nm west, 9:14 am CDT (14:14 UTC): light chop turbulence above 36,000 ft, remarks: ZFW82. 199 nm along the route, 4 nm west of the line.
as filed, and in English
BPG UA /OV BGS/TM 1414/FL360/TP B738/TB OCNL LGT CHOP FL 360/RM ZFW82
- Report
- a routine report filed through BPG
- Where
- over BGS
- Time
- 14:14 UTC
- Height
- at 36,000 ft
- Aircraft
- B738
- Turbulence
- occasional light chop flight level at 36,000 ft
- Remarks
- ZFW82
- B737 at 37,000 ft, 23 nm southwest, 8:43 am CDT (13:43 UTC): light chop turbulence, remarks: ZFW82. 289 nm along the route, 23 nm southwest of the line.
as filed, and in English
HOB UA /OV HOB/TM 1343/FL370/TP B737/TB OCNL LGT CHOP/RM ZFW82
- Report
- a routine report filed through HOB
- Where
- over HOB
- Time
- 13:43 UTC
- Height
- at 37,000 ft
- Aircraft
- B737
- Turbulence
- occasional light chop
- Remarks
- ZFW82
- C525 at 12,000 ft, 50 nm north, 9:44 am CDT (14:44 UTC): light to moderate turbulence. 478 nm along the route, 50 nm north of the line.
as filed, and in English
ABQ UA /OV ABQ096028/TM 1444/FL120/TP C525/TB LGT-MOD
- Report
- a routine report filed through ABQ
- Where
- 28 nm east (096°) of ABQ
- Time
- 14:44 UTC
- Height
- at 12,000 ft
- Aircraft
- C525
- Turbulence
- light to moderate
- B737 at 16,000 ft, 17 nm north, 8:37 am CDT (13:37 UTC): -10 °C, remarks: produced by skypath. 876 nm along the route, 17 nm north of the line.
as filed, and in English
LSV UA /OV MMM156023 /TM 1337 /FL160 /TP B737 /TA M10 /IC TRACE-LGT-RIME /RM PRODUCED BY SKYPATH
- Report
- a routine report filed through LSV
- Where
- 23 nm southeast (156°) of MMM
- Time
- 13:37 UTC
- Height
- at 16,000 ft
- Aircraft
- B737
- Temperature
- −10 °C
- Icing
- trace-lgt-rime
- Remarks
- produced by skypath
- C172 at 3,000 ft, 7 nm southwest, 9:32 am CDT (14:32 UTC): no turbulence. 916 nm along the route, 7 nm southwest of the line.
as filed, and in English
VGT UA /OV LAS335008/TM 1432/FL030/TP C172/TB NEG
- Report
- a routine report filed through VGT
- Where
- 8 nm northwest (335°) of LAS
- Time
- 14:32 UTC
- Height
- at 3,000 ft
- Aircraft
- C172
- Turbulence
- none
- P28A at 5,400 ft, 2 nm west, 9:40 am CDT (14:40 UTC): no turbulence. 926 nm along the route, 2 nm west of the line.
as filed, and in English
VGT UA /OV LAS316017/TM 1440/FL054/TP P28A/SK BASES 080/TB NEG
- Report
- a routine report filed through VGT
- Where
- 17 nm northwest (316°) of LAS
- Time
- 14:40 UTC
- Height
- at 5,400 ft
- Aircraft
- P28A
- Sky
- bases 8,000 ft
- Turbulence
- none
- B738 at 16,000 ft, 13 nm southwest, 8:10 am CDT (13:10 UTC): light rime icing, -12 °C, remarks: from 14,000 ft to 16,000 ft. 936 nm along the route, 13 nm southwest of the line.
as filed, and in English
LAS UA /OV LAS270022/TM 1310/FL160/TP B738/TA M12/IC LGT RIME/RM 140-160
- Report
- a routine report filed through LAS
- Where
- 22 nm west (270°) of LAS
- Time
- 13:10 UTC
- Height
- at 16,000 ft
- Aircraft
- B738
- Temperature
- −12 °C
- Icing
- light rime
- Remarks
- from 14,000 ft to 16,000 ft
- B38M at 16,000 ft, 18 nm southwest, 8:06 am CDT (13:06 UTC): light rime icing, -2 °C, remarks: from 13,000 ft to 16,000 ft. 936 nm along the route, 18 nm southwest of the line.
as filed, and in English
LAS UA /OV LAS260025/TM 1306/FL160/TP B38M/TA M02/IC LGT RIME/RM 130-160
- Report
- a routine report filed through LAS
- Where
- 25 nm west (260°) of LAS
- Time
- 13:06 UTC
- Height
- at 16,000 ft
- Aircraft
- B38M
- Temperature
- −2 °C
- Icing
- light rime
- Remarks
- from 13,000 ft to 16,000 ft
- UAL1806 at 39,000 ft, 6 nm northwest, 7:32 am CDT (12:32 UTC): light chop turbulence, wind 238° at 14 knots. 1175 nm along the route, 6 nm northwest of the line.
as filed, and in English
ARP UAL1806 3722N 12024W 1232 F390 238/014KT TB OCNL LGT CHOP IC
- Report
- a routine report filed through ARP
3 more routine reports are on the map.
Winds aloft along the route, and the time en route the forecast for use 14:00–21:00 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 10 forecast points nearest it (ABI, LBB, ROW, ABQ, FMN, PRC, LAS, BIH, FAT, 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 |
|---|---|---|---|---|---|---|
| 4,500 ft | 220° at 10 kt | +4 kt | 15 °C | 116 kt | 10 h 59 min | 7:01 pm PDT (02:01 UTC) |
| 6,500 ft | 220° at 10 kt | +3 kt | 11 °C | 117 kt | 10 h 53 min | 6:55 pm PDT (01:55 UTC) |
| 8,500 ft | 210° at 16 kt | +2 kt | 7 °C | 118 kt | 10 h 48 min | 6:50 pm PDT (01:50 UTC) |
| 10,500 ft | 210° at 19 kt | +3 kt | 4 °C | 117 kt | 10 h 53 min | 6:55 pm PDT (01:55 UTC) |
| 12,500 ft | 210° at 23 kt | +5 kt | 0 °C | 115 kt | 11 h 05 min | 7:07 pm PDT (02:07 UTC) |
| 14,500 ft | 220° at 26 kt | +9 kt | -3 °C | 111 kt | 11 h 29 min | 7:31 pm PDT (02:31 UTC) |
| 16,500 ft | 230° at 29 kt | +13 kt | -7 °C | 107 kt | 11 h 54 min | 7:56 pm PDT (02:56 UTC) |
| 18,000 ft FL180 | 230° at 31 kt | +16 kt | -9 °C | 104 kt | 12 h 15 min | 8:17 pm PDT (03:17 UTC) |
| 24,000 ft FL240 | 230° at 40 kt | +22 kt | -20 °C | 98 kt | 13 h | 9:02 pm PDT (04:02 UTC) |
| 30,000 ft FL300 | 230° at 52 kt | +29 kt | -30 °C | 91 kt | 14 h | 10:02 pm PDT (05:02 UTC) |
| 34,000 ft FL340 | 240° at 58 kt | +35 kt | -38 °C | 85 kt | 14 h 59 min | 11:01 pm PDT (06:01 UTC) |
| 39,000 ft FL390 | 230° at 59 kt | +35 kt | -48 °C | 85 kt | 14 h 59 min | 11:01 pm PDT (06:01 UTC) |
Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ABI | used from 0 nm out; 101 nm from the line | 210/22 19° | 210/14 15° | 210/19 8° | 240/17 -4° | 240/31 -15° | 240/35 -27° | 260/30 -37° | 260/18 -51° | |
| LBB | used from 199 nm out; 66 nm from the line | 240/21 20° | 230/20 15° | 210/19 8° | 230/39 -6° | 230/48 -16° | 240/57 -27° | 250/51 -37° | 240/45 -50° | |
| ROW | used from 299 nm out; 43 nm from the line | 230/6 | 220/20 13° | 210/37 7° | 220/48 -6° | 220/52 -16° | 230/65 -27° | 230/67 -37° | 240/64 -49° | |
| ABQ | used from 448 nm out; 59 nm from the line | 200/19 9° | 220/32 3° | 230/52 -7° | 220/67 -20° | 230/86 -26° | 230/87 -36° | 230/87 -49° | ||
| FMN | used from 597 nm out; 124 nm from the line | 170/14 8° | 210/28 0° | 230/57 -10° | 220/74 -21° | 230/82 -30° | 230/95 -37° | 230/102 -47° | ||
| PRC | used from 647 nm out; 109 nm from the line | 200/38 5° | 200/44 -1° | 210/72 -11° | 220/78 -20° | 220/85 -29° | 230/99 -36° | 230/105 -47° | ||
| LAS | used from 846 nm out; 46 nm from the line | 220/15 7° | 210/23 2° | 200/32 -4° | 200/43 -14° | 210/64 -23° | 210/78 -32° | 220/81 -38° | 220/80 -45° | |
| BIH | used from 996 nm out; 69 nm from the line | L/V | 340/7 -3° | L/V -8° | 250/15 -17° | 330/30 -24° | 270/23 -34° | 230/35 -39° | 230/39 -44° | |
| FAT | used from 1095 nm out; 31 nm from the line | L/V | 170/5 2° | 130/10 -4° | L/V -7° | 350/60 -11° | 340/62 -23° | 320/36 -38° | 270/25 -41° | 250/32 -44° |
| SFO | used from 1195 nm out; 55 nm from the line | 010/6 | 360/13 5° | 360/17 -3° | 350/39 -2° | 350/56 -11° | 350/57 -24° | 350/59 -40° | 340/50 -46° | 320/30 -47° |
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 |
|---|---|---|---|---|---|---|---|
| GRK Fort Hood (Killeen), TX | departure | no report just now | 1,015 ft | ||||
| LZZ Lampasas, TX | 20 nm out, 6 nm south of the line | no report just now | 1,214 ft | ||||
| LUV Lamesa, TX | 229 nm out, 10 nm north of the line | no report just now | 2,998 ft | ||||
| ROW Roswell, NM | 368 nm out, 9 nm south of the line, tower | no report just now | 3,671 ft | ||||
| ONM Socorro, NM | 488 nm out, 11 nm southwest of the line | no report just now | 4,875 ft | ||||
| XNI Zuni, NM | 607 nm out, 16 nm north of the line | no report just now | 6,371 ft | ||||
| FLG Flagstaff, AZ | 737 nm out, 20 nm south of the line, tower | no report just now | 7,014 ft | ||||
| GCN Grand Canyon, AZ | 777 nm out, 20 nm northeast of the line, tower | no report just now | 6,608 ft | ||||
| VGT Las Vegas, NV | 916 nm out, 7 nm southwest of the line, tower | no report just now | 2,205 ft | ||||
| FAT Fresno, CA | 1135 nm out, 25 nm southwest of the line, tower | no report just now | 335 ft | ||||
| MER Atwater, CA | 1185 nm out, 4 nm northwest of the line, tower | no report just now | 190 ft | ||||
| SFO San Francisco, CA | destination | no report just now | 13 ft |
The highest airport on this list sits at 7,014 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SFO when you get there the forecast at the estimated arrival, 6:50 pm PDT (01:50 UTC)
SFO has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8722 ALAMOGORDO, NM, Tuesday, October 13, 2026 Local on the route, 428 nm along the route · security · starts tomorrow · ZAB
- 6/8890 LAS VEGAS, NV, Tuesday, October 13, 2026 Local on the route, 896 nm along the route · a VIP movement · starts tomorrow · ZLA
- 6/8808 Las Vegas, NV, Tuesday, October 13, 2026 Local 11 nm from the route, 916 nm along the route · security · starts tomorrow · ZLA
- 6/7094 45NM NE MERCED, CA, Sunday, October 4, 2026 through Tuesday, October 20, 2026 UTC 18 nm from the route, 1145 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 20 October · ZOA
Daylight
Sunset at GRK 7:02 pm CDT (00:02 UTC), at SFO 6:35 pm PDT (01:35 UTC) (civil twilight ends 7:01 pm PDT (02:01 UTC)). At 120 knots the arrival at SFO is after sunset there (6:36 pm PDT (01:36 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: Robert Gray Army Airfield, San Francisco International.