Piedmont Triad International to San Antonio International GSO → SAT
1,012 nautical miles (1,165 statute miles) west on a straight line, true course 252°, about 260° magnetic at the departure end (variation 8W). At 120 knots that is 8 h 43 min at the quickest height in today's winds (39,000 ft, a 4-knot headwind), arriving about 2:25 pm CDT (19:25 UTC). 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 3W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the first 109 nm of the route.
- AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the route from 40 to 228 nm out.
- AIRMET TANGO 5W: moderate turbulence above 18,000 ft (due to mountain wave) from 29,000 ft to 40,000 ft. Over the route from 50 to 228 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 119 to 228 nm out.
- AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 169 to 248 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 GSO.
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 10 forecast points nearest it (RDU, GSP, TYS, ATL, HSV, BHM, JAN, SHV, CLL, SAT). 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 | 280° at 8 kt | +8 kt | 112 kt | 9 h 02 min | 2:44 pm CDT (19:44 UTC) | |
| 6,500 ft | 290° at 8 kt | +6 kt | 16 °C | 114 kt | 8 h 53 min | 2:35 pm CDT (19:35 UTC) |
| 8,500 ft | 310° at 10 kt | +6 kt | 12 °C | 114 kt | 8 h 53 min | 2:35 pm CDT (19:35 UTC) |
| 10,500 ft | 310° at 11 kt | +6 kt | 9 °C | 114 kt | 8 h 53 min | 2:35 pm CDT (19:35 UTC) |
| 12,500 ft | 310° at 12 kt | +7 kt | 5 °C | 113 kt | 8 h 57 min | 2:39 pm CDT (19:39 UTC) |
| 14,500 ft | 310° at 14 kt | +8 kt | 1 °C | 112 kt | 9 h 02 min | 2:44 pm CDT (19:44 UTC) |
| 16,500 ft | 310° at 16 kt | +9 kt | -3 °C | 111 kt | 9 h 07 min | 2:49 pm CDT (19:49 UTC) |
| 18,000 ft FL180 | 310° at 17 kt | +10 kt | -6 °C | 110 kt | 9 h 12 min | 2:54 pm CDT (19:54 UTC) |
| 24,000 ft FL240 | 310° at 17 kt | +8 kt | -17 °C | 112 kt | 9 h 02 min | 2:44 pm CDT (19:44 UTC) |
| 30,000 ft FL300 | 320° at 33 kt | +12 kt | -31 °C | 108 kt | 9 h 22 min | 3:04 pm CDT (20:04 UTC) |
| 34,000 ft FL340 | 330° at 36 kt | +6 kt | -40 °C | 114 kt | 8 h 53 min | 2:35 pm CDT (19:35 UTC) |
| 39,000 ft FL390 | 330° at 34 kt | +4 kt | -51 °C | 116 kt | 8 h 43 min | 2:25 pm CDT (19:25 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| RDU | used from 0 nm out; 80 nm from the line | 330/30 | 340/24 12° | 330/26 7° | 320/30 3° | 330/39 -8° | 310/30 -20° | 300/33 -33° | 310/34 -39° | 310/41 -47° |
| GSP | used from 50 nm out; 64 nm from the line | 340/30 | 360/24 13° | 350/29 10° | 340/33 6° | 340/40 -7° | 350/44 -19° | 340/59 -31° | 350/55 -41° | 300/29 -50° |
| TYS | used from 149 nm out; 51 nm from the line | 330/16 | 350/32 14° | 350/37 9° | 340/30 5° | 330/28 -6° | 340/36 -19° | 330/40 -33° | 330/51 -41° | 330/36 -51° |
| ATL | used from 248 nm out; 70 nm from the line | 330/32 | 340/36 17° | 350/34 10° | 340/25 6° | 330/27 -6° | 350/35 -18° | 330/49 -32° | 340/47 -41° | 340/27 -51° |
| HSV | used from 298 nm out; 37 nm from the line | 300/20 | 310/14 16° | 310/18 10° | 310/15 4° | 320/19 -5° | 290/16 -18° | 320/36 -32° | 320/47 -41° | 330/42 -50° |
| BHM | used from 347 nm out; 31 nm from the line | 310/19 | 310/15 16° | 320/19 11° | 330/15 5° | 330/23 -5° | 320/14 -18° | 320/36 -32° | 330/44 -40° | 340/36 -51° |
| JAN | used from 447 nm out; 87 nm from the line | 240/10 | 260/15 18° | 280/10 11° | 290/6 6° | 290/15 -5° | 300/15 -17° | 320/35 -30° | 330/38 -40° | 330/39 -51° |
| SHV | used from 645 nm out; 71 nm from the line | 210/20 | 210/20 18° | 230/20 11° | 240/16 7° | 270/17 -7° | 250/11 -15° | 300/34 -30° | 310/34 -40° | 320/36 -51° |
| CLL | used from 794 nm out; 68 nm from the line | 180/24 | 170/21 19° | 180/10 14° | 230/7 8° | 230/16 -6° | 260/20 -13° | 290/23 -29° | 320/21 -39° | 340/35 -51° |
| SAT | used from 943 nm out; 45 nm from the line | 160/18 | 180/22 17° | 190/16 14° | 210/16 9° | 220/16 -5° | 200/11 -14° | 250/8 -29° | 330/8 -40° | 020/26 -51° |
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 |
|---|---|---|---|---|---|---|---|
| GSO Greensboro, NC | departure | no report just now | 925 ft | ||||
| HKY Hickory, NC | 69 nm out, 4 nm west of the line, tower | no report just now | 1,189 ft | ||||
| AVL Asheville, NC | 129 nm out, 4 nm west of the line, tower | no report just now | 2,163 ft | ||||
| CHA Chattanooga, TN | 268 nm out, 24 nm north of the line, tower | no report just now | 682 ft | ||||
| JFX Jasper, AL | 387 nm out, 2 nm southeast of the line | no report just now | 482 ft | ||||
| GTR Columbus/W Point/Starkville, MS | 457 nm out, 3 nm southeast of the line, tower | no report just now | 264 ft | ||||
| TVR Tallulah, LA | 596 nm out, 15 nm southeast of the line | no report just now | 85 ft | ||||
| MLU Monroe, LA | 635 nm out, 15 nm northwest of the line, tower | no report just now | 78 ft | ||||
| LFK Lufkin, TX | 794 nm out, 4 nm northwest of the line | no report just now | 295 ft | ||||
| CLL College Station, TX | 883 nm out, 7 nm northwest of the line, tower | no report just now | 320 ft | ||||
| BAZ New Braunfels, TX | 993 nm out, 5 nm east of the line, tower | no report just now | 658 ft | ||||
| SAT San Antonio, TX | destination | no report just now | 809 ft |
The highest airport on this list sits at 2,163 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SAT when you get there the forecast at the estimated arrival, 2:25 pm CDT (19:25 UTC)
SAT has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
No temporary flight restriction on or near this route right now.
Daylight
Sunset at GSO 6:48 pm EDT (22:48 UTC), at SAT 7:05 pm CDT (00:05 UTC) (civil twilight ends 7:29 pm CDT (00:29 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: Piedmont Triad International, San Antonio International.