Robert Gray Army Airfield to Jacksonville International GRK → JAX
833 nautical miles (958 statute miles) east on a straight line, true course 088°, about 084° magnetic at the departure end (variation 4E). At 120 knots that is 6 h at the quickest height in today's winds (30,000 ft, a 19-knot tailwind), arriving about 4:08 pm EDT (20:08 UTC). Right now GRK is VFR, wind from the southeast (140°) at 8 knots; JAX is VFR, wind from the west-northwest (290°) at 8 knots. 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: 5 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
No SIGMET or AIRMET covers any part of this route right now.
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
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 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 7 forecast points nearest it (CLL, SHV, LCH, MSY, MOB, TLH, JAX). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 3,500 ft | 210° at 4 kt | −3 kt | 123 kt | 6 h 46 min | 4:54 pm EDT (20:54 UTC) | |
| 5,500 ft | 200° at 3 kt | −1 kt | 121 kt | 6 h 53 min | 5:01 pm EDT (21:01 UTC) | |
| 7,500 ft | 260° at 2 kt | −2 kt | 15 °C | 122 kt | 6 h 50 min | 4:58 pm EDT (20:58 UTC) |
| 9,500 ft | 300° at 4 kt | −4 kt | 11 °C | 124 kt | 6 h 43 min | 4:51 pm EDT (20:51 UTC) |
| 11,500 ft | 270° at 6 kt | −6 kt | 8 °C | 126 kt | 6 h 37 min | 4:45 pm EDT (20:45 UTC) |
| 13,500 ft | 280° at 8 kt | −8 kt | 3 °C | 128 kt | 6 h 30 min | 4:38 pm EDT (20:38 UTC) |
| 15,500 ft | 290° at 11 kt | −10 kt | 0 °C | 130 kt | 6 h 24 min | 4:32 pm EDT (20:32 UTC) |
| 17,500 ft | 300° at 14 kt | −12 kt | -5 °C | 132 kt | 6 h 19 min | 4:27 pm EDT (20:27 UTC) |
| 18,000 ft FL180 | 300° at 15 kt | −13 kt | -6 °C | 133 kt | 6 h 16 min | 4:24 pm EDT (20:24 UTC) |
| 24,000 ft FL240 | 310° at 19 kt | −15 kt | -16 °C | 135 kt | 6 h 10 min | 4:18 pm EDT (20:18 UTC) |
| 30,000 ft FL300 | 320° at 28 kt | −19 kt | -31 °C | 139 kt | 6 h | 4:08 pm EDT (20:08 UTC) |
| 34,000 ft FL340 | 340° at 30 kt | −12 kt | -41 °C | 132 kt | 6 h 19 min | 4:27 pm EDT (20:27 UTC) |
| 39,000 ft FL390 | 340° at 33 kt | −12 kt | -52 °C | 132 kt | 6 h 19 min | 4:27 pm EDT (20:27 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| CLL | used from 0 nm out; 59 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° |
| SHV | used from 149 nm out; 86 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° |
| LCH | used from 198 nm out; 61 nm from the line | 170/21 | 160/23 18° | 170/13 13° | 170/6 8° | 300/12 -7° | 280/16 -14° | 320/27 -30° | 330/23 -41° | 340/38 -51° |
| MSY | used from 297 nm out; 94 nm from the line | 150/9 | 140/8 18° | L/V 13° | L/V 6° | 320/15 -5° | 310/16 -16° | 320/32 -31° | 340/35 -40° | 350/34 -52° |
| MOB | used from 446 nm out; 29 nm from the line | L/V | L/V 18° | 020/8 11° | L/V 6° | 330/12 -5° | 330/23 -17° | 330/30 -32° | 350/39 -41° | 340/40 -53° |
| TLH | used from 595 nm out; 79 nm from the line | 340/23 | 350/26 17° | 350/21 11° | 300/13 6° | 320/25 -6° | 340/35 -16° | 350/44 -32° | 360/51 -42° | 350/33 -52° |
| JAX | used from 743 nm out; 64 nm from the line | 310/22 | 310/19 16° | 300/22 14° | 290/25 8° | 300/25 -7° | 300/24 -18° | 270/20 -33° | 260/25 -41° | 290/17 -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 |
|---|---|---|---|---|---|---|---|
| GRK Fort Hood (Killeen), TX | departure | VFR Sky: scattered clouds at 1,300 feet, overcast at 16,000 feet | from the southeast (140°) at 8 knots | 9 mi | 16,000 ft | 1,015 ft | 8:55 am CDT (13:55 UTC) |
| TPL Temple, TX | 20 nm out, 5 nm north of the line | marginal VFR Sky: a broken layer at 1,800 feet, a broken layer at 2,300 feet | from the south-southeast (150°) at 7 knots | 10+ mi | 1,800 ft | 682 ft | 13:51 UTC |
| LFK Lufkin, TX | 159 nm out, 7 nm north of the line | VFR | from the southeast (130°) at 8 knots | 10+ mi | none | 295 ft | 13:53 UTC |
| JAS Jasper, TX | 198 nm out, 14 nm south of the line | VFR | from the east-northeast (070°) at 4 knots | 10+ mi | none | 212 ft | 13:55 UTC |
| AEX Alexandria, LA | 268 nm out, 14 nm north of the line, tower | VFR | from the south-southeast (150°) at 4 knots | 10+ mi | none | 88 ft | 13:53 UTC |
| MCB Mc Comb, MS | 377 nm out, 7 nm north of the line | VFR | calm | 10+ mi | none | 413 ft | 13:53 UTC |
| MOB Mobile, AL | 496 nm out, 17 nm south of the line, tower | VFR Sky: a few clouds at 25,000 feet | from the northwest (320°) at 3 knots | 10+ mi | none | 218 ft | 13:56 UTC |
| BFM Mobile, AL | 505 nm out, 20 nm south of the line, tower | VFR | from the north-northwest (340°) at 5 knots | 10+ mi | none | 26 ft | 13:53 UTC |
| VPS Valparaiso/Destin-Ft Walton Beach, FL | 585 nm out, 24 nm south of the line, tower | VFR | from the north-northwest (340°) at 9 knots | 10+ mi | none | 84 ft | 13:55 UTC |
| TLH Tallahassee, FL | 694 nm out, 20 nm south of the line, tower | VFR | from the north (360°) at 4 knots | 10+ mi | none | 83 ft | 13:53 UTC |
| VLD Valdosta, GA | 753 nm out, 9 nm north of the line, tower | VFR | calm | 10+ mi | none | 203 ft | 13:53 UTC |
| JAX Jacksonville, FL | destination | VFR | from the west-northwest (290°) at 8 knots | 10+ mi | none | 29 ft | 9:56 am EDT (13:56 UTC) |
The highest airport on this list sits at 1,015 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At JAX when you get there the forecast at the estimated arrival, 4:08 pm EDT (20:08 UTC)
Wind from the west-northwest at 10 knots, gusting to 15, visibility more than 6 miles, a few clouds at 3,500 feet, a few clouds at 25,000 feet VFR
The whole forecast for JAX
- From Mon 8:00 am EDT (12:00 UTC): wind from the west at 7 knots, visibility more than 6 miles, a few clouds at 25,000 feet
- From Mon 10:30 am EDT (14:30 UTC): wind from the west-northwest at 10 knots, gusting to 15, visibility more than 6 miles, a few clouds at 3,500 feet, a few clouds at 25,000 feet
- From Mon 6:00 pm EDT (22:00 UTC): wind from the north-northwest at 7 knots, visibility more than 6 miles, a few clouds at 25,000 feet
- From Mon 9:00 pm EDT (01:00 UTC): wind calm, visibility more than 6 miles, clear skies
The forecast for GRK, the departure
- From Mon 7:00 am CDT (12:00 UTC): wind from the south-southeast at 9 knots, scattered clouds at 1,500 feet, a broken layer at 15,000 feet
- At times between Mon 7:00 am CDT (12:00 UTC) and 11:00 am CDT (16:00 UTC): a broken layer at 1,500 feet
- Changing between Mon 11:00 am CDT (16:00 UTC) and 12:00 pm CDT (17:00 UTC) to: wind from the south-southeast at 9 knots, a broken layer at 5,000 feet
- Changing between Mon 5:00 pm CDT (22:00 UTC) and 6:00 pm CDT (23:00 UTC) to: wind from the south-southeast at 9 knots, a broken layer at 10,000 feet
- Changing between Mon 10:00 pm CDT (03:00 UTC) and 11:00 pm CDT (04:00 UTC) to: wind from the south-southeast at 9 knots, a broken layer at 1,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/0543 MCGREGOR, TX 18 nm from the route, at the departure end · security · ZFW
- 6/8389 Jacksonville, FL, Thursday, October 15, 2026 through Sunday, October 18, 2026 UTC 11 nm from the route, at the destination end · air shows/sports · starts Thursday 15 October · ZJX
- 6/8902 MAYPORT, FL, Tuesday, October 13, 2026 through Saturday, October 17, 2026 Local 11 nm from the route, at the destination end · security · starts tomorrow · ZJX
Daylight
Sunset at GRK 7:02 pm CDT (00:02 UTC), at JAX 6:59 pm EDT (22:59 UTC) (civil twilight ends 7:23 pm EDT (23:23 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, Jacksonville International.