Plan a flight · Mon 8:07 am CDT (13:07 UTC)

Robert Gray Army Airfield to Piedmont Triad International GRK → GSO

943 nautical miles (1,085 statute miles) northeast on a straight line, true course 067°, about 063° magnetic at the departure end (variation 4E). At 120 knots that is 6 h 56 min at the quickest height in today's winds (30,000 ft, a 16-knot tailwind), arriving about 4:03 pm EDT (20:03 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 SIERRA 1E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, mist, fog). Over the route from 486 to 506 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 615 to 804 nm out.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 695 to 843 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 744 to 903 nm out.
AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the route from 754 to 903 nm out.
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 last 89 nm of 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 GRK.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

B739 at 36,000 ft, 37 nm south, 6:18 am CDT (11:18 UTC): moderate turbulence, remarks: ztlfd 36. 784 nm along the route, 37 nm south of the line.
as filed, and in English
```
ATL UA /OV ODF065025/TM 1118/FL360/TP B739/TB MOD/RM ZTLFD 36
```
Report
a routine report filed through ATL
Where
25 nm northeast (065°) of ODF
Time
11:18 UTC
Height
at 36,000 ft
Aircraft
B739
Turbulence
moderate
Remarks
ztlfd 36
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
A321 at 32,000 ft, 21 nm south, 7:53 am CDT (12:53 UTC): light chop turbulence, remarks: ZFW89. 179 nm along the route, 21 nm south of the line.
as filed, and in English
```
GGG UA /OV GGG155035/TM 1253/FL320/TP A321/TB CONS LGT CHOP/RM ZFW89
```
Report
a routine report filed through GGG
Where
35 nm southeast (155°) of GGG
Time
12:53 UTC
Height
at 32,000 ft
Aircraft
A321
Turbulence
continuous light chop
Remarks
ZFW89
A321 , 9 nm southeast, 7:03 am CDT (12:03 UTC): light chop turbulence, remarks: ZFW86. 228 nm along the route, 9 nm southeast of the line.
as filed, and in English
```
SHV UA /OV EMG/TM 1203/FLB38M/TP A321/TB OCNL LGT CHOP DURC/RM ZFW86
```
Report
a routine report filed through SHV
Where
over EMG
Time
12:03 UTC
Height
at B38M
Aircraft
A321
Turbulence
occasional light chop during the climb
Remarks
ZFW86
B38M at 39,000 ft, 49 nm south, 6:58 am CDT (11:58 UTC): light turbulence, remarks: ztlfd 02. 625 nm along the route, 49 nm south of the line.
as filed, and in English
```
ATL UA /OV CTJ300040/TM 1158/FL390/TP B38M/TB LGT/RM ZTLFD 02
```
Report
a routine report filed through ATL
Where
40 nm northwest (300°) of CTJ
Time
11:58 UTC
Height
at 39,000 ft
Aircraft
B38M
Turbulence
light
Remarks
ztlfd 02
F2TH at 41,000 ft, 42 nm south, 6:57 am CDT (11:57 UTC): light turbulence, remarks: ztlfd 02. 655 nm along the route, 42 nm south of the line.
as filed, and in English
```
ATL UA /OV RMG270015/TM 1157/FL410/TP F2TH/TB LGT/RM ZTLFD 02
```
Report
a routine report filed through ATL
Where
15 nm west (270°) of RMG
Time
11:57 UTC
Height
at 41,000 ft
Aircraft
F2TH
Turbulence
light
Remarks
ztlfd 02
DA62 at 1,100 ft, 6 nm north, 8:05 am CDT (13:05 UTC): fog. 675 nm along the route, 6 nm north of the line.
as filed, and in English
```
CHA UA /OV CHA 1S/TM 1305/FL011/TP DA62/SK VV002-TOP011/WX 1/8SM FG
```
Report
a routine report filed through CHA
Where
cha 1S
Time
13:05 UTC
Height
at 1,100 ft
Aircraft
DA62
Sky
sky obscured from 200 ft, tops 1,100 ft
Weather
1/8SM, fog
CRJ9 at 200 ft, 6 nm north, 7:30 am CDT (12:30 UTC): sky obscured, remarks: visual at mins runway 20 cha. 675 nm along the route, 6 nm north of the line.
as filed, and in English
```
CHA UA /OV CHA 1N/TM 1230/FL002/TP CRJ9/SK VV002/WX 1/8SM/RM VISUAL AT MINS RY 20 CHA
```
Report
a routine report filed through CHA
Where
cha 1N
Time
12:30 UTC
Height
at 200 ft
Aircraft
CRJ9
Sky
sky obscured from 200 ft
Weather
1/8SM
Remarks
visual at mins runway 20 cha
B712 at 1,500 ft, 6 nm north, 7:26 am CDT (12:26 UTC): remarks: during the climb runway 20 departure. 675 nm along the route, 6 nm north of the line.
as filed, and in English
```
CHA UA /OV CHA/TM 1226/FL015/TP B712/SK TOP015/RM DURC. RY 20 DEPARTURE
```
Report
a routine report filed through CHA
Where
over CHA
Time
12:26 UTC
Height
at 1,500 ft
Aircraft
B712
Sky
TOP015
Remarks
during the climb runway 20 departure
E145 at 1,000 ft, 6 nm north, 7:19 am CDT (12:19 UTC): remarks: during the descent runway 20 arrival weather at ils clear-air turbulence 2 mins. 675 nm along the route, 6 nm north of the line.
as filed, and in English
```
CHA UA /OV CHA/TM 1219/FL010/TP E145/RM DURD. RY 20 ARRIVAL. WX AT ILS CAT 2 MINS
```
Report
a routine report filed through CHA
Where
over CHA
Time
12:19 UTC
Height
at 1,000 ft
Aircraft
E145
Remarks
during the descent runway 20 arrival weather at ils clear-air turbulence 2 mins
B739 at 36,000 ft, 42 nm north, 6:34 am CDT (11:34 UTC): light turbulence, remarks: ztlfd 36. 675 nm along the route, 42 nm north of the line.
as filed, and in English
```
ATL UA /OV HCH250025/TM 1134/FL360/TP B739/TB LGT/RM ZTLFD 36
```
Report
a routine report filed through ATL
Where
25 nm west (250°) of HCH
Time
11:34 UTC
Height
at 36,000 ft
Aircraft
B739
Turbulence
light
Remarks
ztlfd 36
C56X at 1,000 ft, 6 nm north, 6:04 am CDT (11:04 UTC): remarks: during the climb runway 20 departure. 675 nm along the route, 6 nm north of the line.
as filed, and in English
```
CHA UA /OV CHA/TM 1104/FL010/TP C56X/SK TOP010/RM DURC. RY 20 DEPARTURE
```
Report
a routine report filed through CHA
Where
over CHA
Time
11:04 UTC
Height
at 1,000 ft
Aircraft
C56X
Sky
TOP010
Remarks
during the climb runway 20 departure
CRJ9 at 1,000 ft, 6 nm north, 5:15 am CDT (10:15 UTC): remarks: during the climb runway 20 departure. 675 nm along the route, 6 nm north of the line.
as filed, and in English
```
CHA UA /OV CHA/TM 1015/FL010/TP CRJ9/SK TOP010/RM DURC. RY 20 DEPARTURE
```
Report
a routine report filed through CHA
Where
over CHA
Time
10:15 UTC
Height
at 1,000 ft
Aircraft
CRJ9
Sky
TOP010
Remarks
during the climb runway 20 departure

14 more routine reports are on the map.

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 11 forecast points nearest it (CLL, DAL, SHV, LIT, JAN, MEM, HSV, TYS, GSP, TRI, RDU). 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	260° at 11 kt	−12 kt		132 kt	7 h 09 min	4:16 pm EDT (20:16 UTC)
5,500 ft	280° at 10 kt	−9 kt	11 °C	129 kt	7 h 19 min	4:26 pm EDT (20:26 UTC)
7,500 ft	290° at 11 kt	−9 kt	13 °C	129 kt	7 h 19 min	4:26 pm EDT (20:26 UTC)
9,500 ft	300° at 13 kt	−9 kt	10 °C	129 kt	7 h 19 min	4:26 pm EDT (20:26 UTC)
11,500 ft	300° at 13 kt	−9 kt	7 °C	129 kt	7 h 19 min	4:26 pm EDT (20:26 UTC)
13,500 ft	300° at 14 kt	−10 kt	3 °C	130 kt	7 h 15 min	4:22 pm EDT (20:22 UTC)
15,500 ft	300° at 16 kt	−10 kt	-1 °C	130 kt	7 h 15 min	4:22 pm EDT (20:22 UTC)
17,500 ft	300° at 18 kt	−11 kt	-5 °C	131 kt	7 h 12 min	4:19 pm EDT (20:19 UTC)
18,000 ft FL180	300° at 18 kt	−12 kt	-6 °C	132 kt	7 h 09 min	4:16 pm EDT (20:16 UTC)
24,000 ft FL240	300° at 19 kt	−12 kt	-17 °C	132 kt	7 h 09 min	4:16 pm EDT (20:16 UTC)
30,000 ft FL300	310° at 35 kt	−16 kt	-31 °C	136 kt	6 h 56 min	4:03 pm EDT (20:03 UTC)
34,000 ft FL340	320° at 40 kt	−15 kt	-40 °C	135 kt	6 h 59 min	4:06 pm EDT (20:06 UTC)
39,000 ft FL390	320° at 38 kt	−11 kt	-50 °C	131 kt	7 h 12 min	4:19 pm EDT (20:19 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; 65 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°
DAL	used from 99 nm out; 86 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°
SHV	used from 149 nm out; 47 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°
LIT	used from 298 nm out; 100 nm from the line	250/22	250/25 18°	240/23 12°	240/20 7°	250/17 -6°	260/25 -17°	300/45 -29°	300/49 -40°	310/43 -51°
JAN	used from 347 nm out; 79 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°
MEM	used from 447 nm out; 80 nm from the line	250/19	260/19 17°	270/20 12°	270/16 6°	270/21 -6°	290/27 -17°	300/37 -30°	300/49 -40°	310/40 -51°
HSV	used from 496 nm out; 76 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°
TYS	used from 695 nm out; 44 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°
GSP	used from 794 nm out; 43 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°
TRI	used from 843 nm out; 62 nm from the line		340/25 11°	350/37 9°	350/34 6°	340/39 -7°	340/43 -19°	340/55 -32°	330/58 -42°	320/37 -50°
RDU	used from 893 nm out; 81 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°

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	Elevation
GRK Fort Hood (Killeen), TX	departure	no report just now	1,015 ft
CNW Waco, TX	50 nm out, 16 nm northwest of the line, tower	no report just now	470 ft
GGG Longview, TX	179 nm out, 12 nm northwest of the line, tower	no report just now	365 ft
SHV Shreveport, LA	218 nm out, 3 nm east of the line, tower	no report just now	257 ft
GLH Greenville, MS	377 nm out, 6 nm northwest of the line, tower	no report just now	130 ft
GWO Greenwood, MS	417 nm out, 8 nm southeast of the line, tower	no report just now	162 ft
TUP Tupelo, MS	496 nm out, 15 nm north of the line, tower	no report just now	346 ft
HSV Huntsville, AL	595 nm out, 5 nm north of the line, tower	no report just now	628 ft
CHA Chattanooga, TN	675 nm out, 6 nm north of the line, tower	no report just now	682 ft
AVL Asheville, NC	814 nm out, 8 nm south of the line, tower	no report just now	2,163 ft
HKY Hickory, NC	873 nm out, 6 nm southwest of the line, tower	no report just now	1,189 ft
GSO Greensboro, NC	destination	no report just now	925 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 GSO when you get there the forecast at the estimated arrival, 4:03 pm EDT (20:03 UTC)

GSO 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 10 nm from the route, at the departure end · security · ZFW
6/8926 Tyler, TX, Tuesday, October 13, 2026 Local 18 nm from the route, 149 nm along the route · a VIP movement · starts tomorrow · ZFW

Daylight

Sunset at GRK 7:02 pm CDT (00:02 UTC), at GSO 6:48 pm EDT (22:48 UTC) (civil twilight ends 7:13 pm EDT (23:13 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 now, the Southeast · 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, Piedmont Triad International.