Plan a flight · Mon 6:37 am CDT (11:37 UTC)

Robert Gray Army Airfield to MC Allen International GRK → MFE

294 nautical miles (339 statute miles) south on a straight line, true course 184°, about 180° magnetic at the departure end (variation 4E). At 120 knots that is 2 h 02 min at the quickest height in today's winds (39,000 ft, a 24-knot tailwind), arriving about 8:39 am CDT (13:39 UTC). Right now GRK is VFR, wind from the southeast (140°) at 7 knots; MFE is VFR, wind from the east-southeast (120°) 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: 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

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 21,000 ft, 33 nm east, 5:45 am CDT (10:45 UTC): moderate chop turbulence, remarks: zhu. 88 nm along the route, 33 nm east of the line.
as filed, and in English
```
SAT UA /OV SAT090060/TM 1045/FL210/TP A320/TB OCNL MOD CHOP/RM ZHU
```
Report
a routine report filed through SAT
Where
60 nm east (090°) of SAT
Time
10:45 UTC
Height
at 21,000 ft
Aircraft
A320
Turbulence
occasional moderate chop
Remarks
zhu
B738 at 38,000 ft, 12 nm east, 6:22 am CDT (11:22 UTC): no turbulence, remarks: zhu. 49 nm along the route, 12 nm east of the line.
as filed, and in English
```
AUS UA /OV KCWK360015/TM 1122/FL380/TP B738/TB NEG/RM ZHU
```
Report
a routine report filed through AUS
Where
15 nm north (360°) of KCWK
Time
11:22 UTC
Height
at 38,000 ft
Aircraft
B738
Turbulence
none
Remarks
zhu
B748 at 40,000 ft, 12 nm east, 6:17 am CDT (11:17 UTC): no turbulence, remarks: smooth zhu. 49 nm along the route, 12 nm east of the line.
as filed, and in English
```
AUS UA /OV KCWK270015/TM 1117/FL400/TP B748/TB NEG/RM SMOOTH ZHU
```
Report
a routine report filed through AUS
Where
15 nm west (270°) of KCWK
Time
11:17 UTC
Height
at 40,000 ft
Aircraft
B748
Turbulence
none
Remarks
smooth zhu
B737 at 1,800 ft, 27 nm west, 6:18 am CDT (11:18 UTC): remarks: KSAT base 1,800 ft, on top 3,500 ft. 88 nm along the route, 27 nm west of the line.
as filed, and in English
```
SAT UA /OV SAT/TM 1118/FL018/TP B737/RM KSAT BASE 018, ON TOP 035
```
Report
a routine report filed through SAT
Where
over SAT
Time
11:18 UTC
Height
at 1,800 ft
Aircraft
B737
Remarks
KSAT base 1,800 ft, on top 3,500 ft
A320 at 2,300 ft, 27 nm west, 5:37 am CDT (10:37 UTC): remarks: KSAT base 2,300 ft, on top 4,000 ft. 88 nm along the route, 27 nm west of the line.
as filed, and in English
```
SAT UA /OV SAT/TM 1037/FL023/TP A320/RM KSAT BASE 023, ON TOP 040
```
Report
a routine report filed through SAT
Where
over SAT
Time
10:37 UTC
Height
at 2,300 ft
Aircraft
A320
Remarks
KSAT base 2,300 ft, on top 4,000 ft

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 3 forecast points nearest it (SAT, CRP, BRO). 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	160° at 19 kt	+18 kt		102 kt	2 h 53 min	9:30 am CDT (14:30 UTC)
6,500 ft	170° at 19 kt	+19 kt	16 °C	101 kt	2 h 55 min	9:32 am CDT (14:32 UTC)
8,500 ft	180° at 15 kt	+15 kt	14 °C	105 kt	2 h 48 min	9:25 am CDT (14:25 UTC)
10,500 ft	190° at 12 kt	+12 kt	12 °C	108 kt	2 h 43 min	9:20 am CDT (14:20 UTC)
12,500 ft	210° at 11 kt	+10 kt	8 °C	110 kt	2 h 40 min	9:17 am CDT (14:17 UTC)
14,500 ft	220° at 10 kt	+9 kt	3 °C	111 kt	2 h 39 min	9:16 am CDT (14:16 UTC)
16,500 ft	230° at 10 kt	+8 kt	-2 °C	112 kt	2 h 38 min	9:15 am CDT (14:15 UTC)
18,000 ft FL180	230° at 10 kt	+7 kt	-5 °C	113 kt	2 h 36 min	9:13 am CDT (14:13 UTC)
24,000 ft FL240	200° at 9 kt	+9 kt	-14 °C	111 kt	2 h 39 min	9:16 am CDT (14:16 UTC)
30,000 ft FL300	220° at 2 kt	+2 kt	-29 °C	118 kt	2 h 29 min	9:06 am CDT (14:06 UTC)
34,000 ft FL340	010° at 3 kt	−3 kt	-40 °C	123 kt	2 h 23 min	9:00 am CDT (14:00 UTC)
39,000 ft FL390	030° at 26 kt	−24 kt	-51 °C	144 kt	2 h 02 min	8:39 am CDT (13:39 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
SAT	used from 0 nm out; 75 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°
CRP	used from 147 nm out; 40 nm from the line	140/21	160/22 17°	180/14 13°	210/6 9°	270/10 -5°	200/8 -13°	L/V -29°	L/V -40°	030/28 -51°
BRO	used from 245 nm out; 58 nm from the line	160/15	160/15 18°	170/11 14°	150/7 9°	L/V -4°	170/6 -15°	100/15 -29°	100/14 -41°	040/26 -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
GRK Fort Hood (Killeen), TX	departure	VFR Sky: scattered clouds at 2,500 feet, scattered clouds at 3,000 feet	from the southeast (140°) at 7 knots	9 mi	none	1,015 ft	6:25 am CDT (11:25 UTC)
GTU Georgetown, TX	20 nm out, 10 nm east of the line, tower	VFR Sky: scattered clouds at 3,100 feet, a broken layer at 16,000 feet, overcast at 22,000 feet	from the south-southeast (150°) at 5 knots	10+ mi	16,000 ft	789 ft	10:55 UTC
HYI Austin, TX	69 nm out, 4 nm southeast of the line, tower	marginal VFR Sky: a broken layer at 1,900 feet, overcast at 2,400 feet	from the east (090°) at 3 knots	10+ mi	1,900 ft	594 ft	10:56 UTC
BEA Beeville, TX	157 nm out, 15 nm east of the line	VFR Sky: scattered clouds at 1,700 feet, overcast at 6,000 feet	from the east-northeast (070°) at 3 knots	10+ mi	6,000 ft	272 ft	11:35 UTC
ALI Alice, TX	196 nm out, 6 nm southeast of the line	marginal VFR Sky: scattered clouds at 1,900 feet, a broken layer at 2,400 feet, overcast at 3,500 feet	from the east-southeast (120°) at 3 knots	10+ mi	2,400 ft	178 ft	11:17 UTC
BKS Falfurrias, TX	236 nm out, 4 nm northeast of the line	VFR Sky: a few clouds at 1,400 feet	calm	10+ mi	none	111 ft	11:15 UTC
EBG Edinburg, TX	275 nm out, 6 nm southeast of the line	VFR	calm	10+ mi	none	75 ft	11:15 UTC
MFE Mc Allen, TX	destination	VFR	from the east-southeast (120°) at 4 knots	10+ mi	none	107 ft	5:59 am CDT (10:59 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 MFE when you get there the forecast at the estimated arrival, 8:39 am CDT (13:39 UTC)

Wind from the southeast at 5 knots, visibility more than 6 miles, a few clouds at 25,000 feet VFR

The whole forecast for MFE

From Mon 7:00 am CDT (12:00 UTC): wind from the southeast at 5 knots, visibility more than 6 miles, a few clouds at 25,000 feet
From Mon 10:00 am CDT (15:00 UTC): wind from the south-southeast at 8 knots, visibility more than 6 miles, a few clouds at 25,000 feet
From Mon 3:00 pm CDT (20:00 UTC): wind from the south-southeast at 12 knots, gusting to 20, visibility more than 6 miles, scattered clouds at 7,000 feet
From Tue 12:00 am CDT (05:00 UTC): wind from the southeast at 9 knots, visibility more than 6 miles, a few clouds at 25,000 feet

The forecast for GRK, the departure

From Mon 3:00 am CDT (08:00 UTC): wind from the south-southeast at 9 knots, 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

No temporary flight restriction on or near this route right now.

Daylight

Sunset at GRK 7:02 pm CDT (00:02 UTC), at MFE 7:07 pm CDT (00:07 UTC) (civil twilight ends 7:30 pm CDT (00:30 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, 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, MC Allen International.