Plan a flight · Sun 7:36 pm CDT (00:36 UTC)

Robert Gray Army Airfield to Frederick W Smith Intl/Memphis Airport GRK → MEM

461 nautical miles (531 statute miles) northeast on a straight line, true course 057°, about 053° magnetic at the departure end (variation 4E). At 120 knots that is 3 h 18 min at the quickest height in today's winds (9,500 ft, a 20-knot tailwind), arriving about 10:54 pm CDT (03:54 UTC), after sunset at the destination. Right now GRK is VFR, wind from the south-southeast (150°) at 7 knots; MEM is VFR, wind from the south-southwest (210°) at 4 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: 21 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

A320 at 26,500 ft, 16 nm southeast, 5:46 pm CDT (22:46 UTC): moderate clear-air turbulence, remarks: ZFW86. 177 nm along the route, 16 nm southeast of the line.
as filed, and in English
```
GGG UA /OV GGG/TM 2246/FL265/TP A320/TB MOD CAT/RM ZFW86
```
Report
a routine report filed through GGG
Where
over GGG
Time
22:46 UTC
Height
at 26,500 ft
Aircraft
A320
Turbulence
moderate clear-air turbulence
Remarks
ZFW86
CRJ7 at 36,000 ft, 47 nm northwest, 7:10 pm CDT (00:10 UTC): no turbulence, remarks: ZME20. 314 nm along the route, 47 nm northwest of the line.
as filed, and in English
```
HOT UA /OV HOT/TM 0010/FL360/TP CRJ7/TB NEG/RM ZME20
```
Report
a routine report filed through HOT
Where
over HOT
Time
00:10 UTC
Height
at 36,000 ft
Aircraft
CRJ7
Turbulence
none
Remarks
ZME20
PC12 at 24,000 ft, 49 nm southeast, 5:28 pm CDT (22:28 UTC): light chop turbulence, remarks: ZFW28. 334 nm along the route, 49 nm southeast of the line.
as filed, and in English
```
LLQ UA /OV 17 S MON/TM 2228/FL240/TP PC12/TB CONS LGT CHOP/RM ZFW28
```
Report
a routine report filed through LLQ
Where
17 south mon
Time
22:28 UTC
Height
at 24,000 ft
Aircraft
PC12
Turbulence
continuous light chop
Remarks
ZFW28
G280 at 41,000 ft, 3 nm west, 5:12 pm CDT (22:12 UTC): light turbulence, remarks: ZME44. 353 nm along the route, 3 nm west of the line.
as filed, and in English
```
PBF UA /OV PBF180005/TM 2212/FL410/TP G280/TB CONS LGT/RM ZME44
```
Report
a routine report filed through PBF
Where
5 nm south (180°) of PBF
Time
22:12 UTC
Height
at 41,000 ft
Aircraft
G280
Turbulence
continuous light
Remarks
ZME44
A319 at 39,000 ft, 2 nm south, 6:11 pm CDT (23:11 UTC): no chop turbulence, remarks: smooth. At the destination end, 2 nm south of the line.
as filed, and in English
```
MEM UA /OV MEM/TM 2311/FL390/TP A319/TB NEG CHOP/RM SMOOTH
```
Report
a routine report filed through MEM
Where
over MEM
Time
23:11 UTC
Height
at 39,000 ft
Aircraft
A319
Turbulence
no chop
Remarks
smooth

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 5 forecast points nearest it (CLL, DAL, SHV, LIT, MEM). 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	200° at 13 kt	−10 kt		130 kt	3 h 33 min	11:09 pm CDT (04:09 UTC)
5,500 ft	220° at 15 kt	−14 kt		134 kt	3 h 26 min	11:02 pm CDT (04:02 UTC)
7,500 ft	230° at 18 kt	−17 kt	14 °C	137 kt	3 h 22 min	10:58 pm CDT (03:58 UTC)
9,500 ft	240° at 20 kt	−20 kt	11 °C	140 kt	3 h 18 min	10:54 pm CDT (03:54 UTC)
11,500 ft	250° at 18 kt	−18 kt	8 °C	138 kt	3 h 20 min	10:56 pm CDT (03:56 UTC)
13,500 ft	260° at 17 kt	−16 kt	4 °C	136 kt	3 h 23 min	10:59 pm CDT (03:59 UTC)
15,500 ft	270° at 16 kt	−14 kt	0 °C	134 kt	3 h 26 min	11:02 pm CDT (04:02 UTC)
17,500 ft	280° at 16 kt	−12 kt	-4 °C	132 kt	3 h 30 min	11:06 pm CDT (04:06 UTC)
18,000 ft FL180	280° at 16 kt	−12 kt	-5 °C	132 kt	3 h 30 min	11:06 pm CDT (04:06 UTC)
24,000 ft FL240	290° at 17 kt	−10 kt	-16 °C	130 kt	3 h 33 min	11:09 pm CDT (04:09 UTC)
30,000 ft FL300	300° at 36 kt	−16 kt	-30 °C	136 kt	3 h 23 min	10:59 pm CDT (03:59 UTC)
34,000 ft FL340	300° at 36 kt	−15 kt	-40 °C	135 kt	3 h 25 min	11:01 pm CDT (04:01 UTC)
39,000 ft FL390	310° at 39 kt	−13 kt	-52 °C	133 kt	3 h 28 min	11:04 pm CDT (04:04 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
CLL	used from 0 nm out; 69 nm from the line	160/18	190/18 16°	200/19 12°	220/14 7°	260/18 -5°	250/20 -13°	290/29 -29°	290/31 -40°	300/22 -53°
DAL	used from 49 nm out; 68 nm from the line	180/21	190/24 15°	230/20 12°	220/23 8°	240/22 -5°	230/18 -15°	280/33 -29°	280/36 -39°	300/33 -52°
SHV	used from 147 nm out; 60 nm from the line	190/11	230/19 17°	230/26 12°	260/15 7°	280/16 -4°	300/17 -15°	300/34 -30°	300/31 -41°	310/42 -52°
LIT	used from 295 nm out; 53 nm from the line	220/12	250/12 17°	250/18 12°	260/22 6°	310/14 -5°	310/25 -17°	310/40 -31°	310/38 -41°	310/46 -52°
MEM	used from 393 nm out; 44 nm from the line	240/9	280/14 17°	280/20 12°	290/25 5°	320/25 -6°	330/31 -18°	320/52 -32°	330/58 -41°	320/42 -50°

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	from the south-southeast (150°) at 7 knots	10+ mi	none	1,015 ft	6:55 pm CDT (23:55 UTC)
ACT Waco, TX	39 nm out, 12 nm north of the line, tower	VFR	from the south (170°) at 11 knots	10+ mi	none	516 ft	23:51 UTC
CNW Waco, TX	49 nm out, 8 nm north of the line, tower	VFR	from the south-southeast (160°) at 9 knots	10+ mi	none	470 ft	23:55 UTC
PSN Palestine, TX	118 nm out, 23 nm southeast of the line	VFR	from the southeast (130°) at 3 knots	9 mi	none	422 ft	00:15 UTC
TYR Tyler, TX	147 nm out, 2 nm south of the line, tower	VFR	from the south-southeast (150°) at 6 knots	10+ mi	none	543 ft	23:53 UTC
ATA Atlanta, TX	226 nm out, 6 nm west of the line	no report just now				280 ft
TXK Texarkana, AR	245 nm out, 18 nm northwest of the line, tower	VFR	from the south (170°) at 3 knots	10+ mi	none	389 ft	23:53 UTC
CDH Camden, AR	295 nm out, 7 nm east of the line	VFR	from the southwest (230°) at 7 knots	9 mi	none	129 ft	22:15 UTC
PBF Pine Bluff, AR	353 nm out, 3 nm west of the line	VFR	from the south-southwest (210°) at 3 knots	10+ mi	none	205 ft	23:53 UTC
SGT Stuttgart, AR	383 nm out, 16 nm northwest of the line	VFR	from the south (190°) at 6 knots	10+ mi	none	224 ft	23:56 UTC
HEE Helena/West Helena, AR	422 nm out, 9 nm south of the line	no report just now				241 ft
MEM Memphis, TN	destination	VFR Sky: a few clouds at 22,000 feet	from the south-southwest (210°) at 4 knots	10+ mi	none	340 ft	6:54 pm CDT (23:54 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 MEM when you get there the forecast at the estimated arrival, 10:54 pm CDT (03:54 UTC)

Wind from the south-southwest at 4 knots, visibility more than 6 miles, a few clouds at 25,000 feet VFR

The whole forecast for MEM

From Sun 7:00 pm CDT (00:00 UTC): wind from the south-southwest at 4 knots, visibility more than 6 miles, a few clouds at 25,000 feet
From Mon 11:00 am CDT (16:00 UTC): wind from the west-southwest at 9 knots, gusting to 17, visibility more than 6 miles, clear skies
From Mon 7:00 pm CDT (00:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, a few clouds at 10,000 feet

The forecast for GRK, the departure

From Sun 7:00 pm CDT (00:00 UTC): wind from the south-southeast at 9 knots, scattered clouds at 6,000 feet
Changing between Mon 3:00 am CDT (08:00 UTC) and 4:00 am CDT (09:00 UTC) to: wind from the southeast at 6 knots, a broken layer at 1,500 feet
Changing between Mon 4:00 pm CDT (21:00 UTC) and 5:00 pm CDT (22:00 UTC) to: wind from the south-southeast at 12 knots, a broken layer at 5,000 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 1,500 feet

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

6/0543 MCGREGOR, TX 5 nm from the route, 29 nm along the route · security · ZFW

Daylight

Sunset at GRK 7:03 pm CDT (00:03 UTC), at MEM 6:29 pm CDT (23:29 UTC) (civil twilight ends 6:54 pm CDT (23:54 UTC)). At 120 knots the arrival at MEM is after sunset there (6:30 pm CDT (23:30 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 southern Plains · loop National Weather Service

Radar now, the lower Mississippi valley · 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: Robert Gray Army Airfield, Frederick W Smith Intl/Memphis Airport.