Gerald R Ford International to San Antonio International GRR → SAT
1,015 nautical miles (1,168 statute miles) southwest on a straight line, true course 222°, about 228° magnetic at the departure end (variation 6W). At 120 knots that is 8 h 50 min at the quickest height in today's winds (39,000 ft, a 5-knot headwind), arriving about 3:16 pm CDT (20:16 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: 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 2W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Near the route, 517 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 GRR.
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 11 forecast points nearest it (MKG, JOT, SPI, STL, COU, SGF, FSM, SHV, DAL, 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 | 230° at 21 kt | +21 kt | 99 kt | 10 h 15 min | 4:41 pm CDT (21:41 UTC) | |
| 6,500 ft | 230° at 18 kt | +17 kt | 15 °C | 103 kt | 9 h 51 min | 4:17 pm CDT (21:17 UTC) |
| 8,500 ft | 240° at 16 kt | +16 kt | 12 °C | 104 kt | 9 h 46 min | 4:12 pm CDT (21:12 UTC) |
| 10,500 ft | 240° at 16 kt | +15 kt | 9 °C | 105 kt | 9 h 40 min | 4:06 pm CDT (21:06 UTC) |
| 12,500 ft | 250° at 17 kt | +14 kt | 6 °C | 106 kt | 9 h 35 min | 4:01 pm CDT (21:01 UTC) |
| 14,500 ft | 250° at 19 kt | +15 kt | 1 °C | 105 kt | 9 h 40 min | 4:06 pm CDT (21:06 UTC) |
| 16,500 ft | 260° at 21 kt | +16 kt | -4 °C | 104 kt | 9 h 46 min | 4:12 pm CDT (21:12 UTC) |
| 18,000 ft FL180 | 260° at 22 kt | +17 kt | -7 °C | 103 kt | 9 h 51 min | 4:17 pm CDT (21:17 UTC) |
| 24,000 ft FL240 | 260° at 27 kt | +19 kt | -17 °C | 101 kt | 10 h 03 min | 4:29 pm CDT (21:29 UTC) |
| 30,000 ft FL300 | 280° at 42 kt | +21 kt | -31 °C | 99 kt | 10 h 15 min | 4:41 pm CDT (21:41 UTC) |
| 34,000 ft FL340 | 280° at 45 kt | +19 kt | -40 °C | 101 kt | 10 h 03 min | 4:29 pm CDT (21:29 UTC) |
| 39,000 ft FL390 | 300° at 48 kt | +5 kt | -50 °C | 115 kt | 8 h 50 min | 3:16 pm CDT (20:16 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| MKG | used from 0 nm out; 39 nm from the line | 260/28 | 260/18 15° | 250/16 9° | 260/22 4° | 280/31 -9° | 270/35 -21° | 270/44 -35° | 270/42 -45° | 290/61 -51° |
| JOT | used from 50 nm out; 74 nm from the line | 250/25 | 260/22 14° | 250/17 9° | 270/21 5° | 280/28 -8° | 280/36 -20° | 270/41 -35° | 280/57 -42° | 290/65 -50° |
| SPI | used from 199 nm out; 43 nm from the line | 260/28 | 250/22 15° | 250/14 9° | 260/20 6° | 280/27 -7° | 280/34 -19° | 280/48 -32° | 280/59 -41° | 300/60 -49° |
| STL | used from 299 nm out; 10 nm from the line | 250/26 | 240/21 15° | 240/22 11° | 250/23 6° | 270/28 -7° | 260/30 -19° | 280/52 -31° | 280/57 -40° | 300/57 -49° |
| COU | used from 398 nm out; 87 nm from the line | 250/36 | 260/14 16° | 250/5 12° | 260/12 6° | 260/24 -7° | 260/35 -19° | 280/58 -31° | 280/62 -40° | 290/60 -49° |
| SGF | used from 448 nm out; 66 nm from the line | 230/37 | 260/20 15° | 250/16 13° | 250/15 8° | 260/28 -7° | 250/31 -17° | 280/59 -31° | 280/59 -39° | 290/55 -50° |
| FSM | used from 547 nm out; 51 nm from the line | 230/33 | 260/23 15° | 240/23 11° | 230/18 8° | 230/20 -8° | 250/31 -17° | 280/51 -30° | 280/52 -39° | 300/47 -51° |
| SHV | used from 697 nm out; 93 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° |
| DAL | used from 746 nm out; 56 nm from the line | 190/30 | 200/28 18° | 220/18 13° | 250/13 8° | 240/24 -6° | 270/20 -14° | 270/35 -29° | 290/34 -39° | 310/41 -51° |
| CLL | used from 846 nm out; 61 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 945 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 |
|---|---|---|---|---|---|---|---|
| GRR Grand Rapids, MI | departure | no report just now | 793 ft | ||||
| SBN South Bend, IN | 80 nm out, 21 nm southeast of the line, tower | no report just now | 798 ft | ||||
| GYY Gary/Chicago, IN | 109 nm out, 13 nm northwest of the line, tower | no report just now | 596 ft | ||||
| DEC Decatur, IL | 239 nm out, 7 nm east of the line, tower | no report just now | 681 ft | ||||
| ALN Alton/St Louis, IL | 318 nm out, 3 nm northeast of the line, tower | no report just now | 543 ft | ||||
| UNO West Plains, MO | 468 nm out, 7 nm east of the line | no report just now | 1,228 ft | ||||
| BPK Mountain Home, AR | 508 nm out, 4 nm east of the line | no report just now | 928 ft | ||||
| MEZ Mena, AR | 647 nm out, 4 nm east of the line | no report just now | 1,079 ft | ||||
| GVT Greenville, TX | 766 nm out, 21 nm northwest of the line, tower | no report just now | 534 ft | ||||
| CNW Waco, TX | 866 nm out, 13 nm west of the line, tower | no report just now | 470 ft | ||||
| GTU Georgetown, TX | 935 nm out, 5 nm northwest of the line, tower | no report just now | 789 ft | ||||
| SAT San Antonio, TX | destination | no report just now | 809 ft |
The highest airport on this list sits at 1,228 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, 3:16 pm CDT (20:16 UTC)
SAT has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/0543 MCGREGOR, TX 19 nm from the route, 896 nm along the route · security · ZFW
Daylight
Sunset at GRR 7:04 pm EDT (23:04 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: Gerald R Ford International, San Antonio International.