Plan a flight · Mon 6:58 am CDT (11:58 UTC)

Huntsville Intl-Carl T Jones Field to San Antonio International HSV → SAT

669 nautical miles (769 statute miles) southwest on a straight line, true course 246°, about 250° magnetic at the departure end (variation 4W). At 120 knots that is 5 h 37 min at the quickest height in today's winds (39,000 ft, a 1-knot headwind), arriving about 12:35 pm CDT (17:35 UTC). Right now HSV is VFR, wind from the east (100°) at 4 knots; SAT is marginal VFR, wind from the east (100°) 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

AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Near the route, at the departure end.
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 90 to 180 nm out.

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 HSV.

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

A320 at 21,000 ft, 32 nm southeast, 5:45 am CDT (10:45 UTC): moderate chop turbulence, remarks: zhu. 619 nm along the route, 32 nm southeast 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
B737 at 20,000 ft, 5 nm northeast, 6:35 am CDT (11:35 UTC): light chop turbulence, remarks: zhu. 549 nm along the route, 5 nm northeast of the line.
as filed, and in English
```
CLL UA /OV KTNV/TM 1135/FL200/TP B737/TB CONS LGT CHOP/RM ZHU
```
Report
a routine report filed through CLL
Where
over KTNV
Time
11:35 UTC
Height
at 20,000 ft
Aircraft
B737
Turbulence
continuous light chop
Remarks
zhu
B738 at 38,000 ft, 14 nm northwest, 6:22 am CDT (11:22 UTC): no turbulence, remarks: zhu. 609 nm along the route, 14 nm northwest 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, 14 nm northwest, 6:17 am CDT (11:17 UTC): no turbulence, remarks: smooth zhu. 609 nm along the route, 14 nm northwest 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, 7 nm north, 6:18 am CDT (11:18 UTC): remarks: KSAT base 1,800 ft, on top 3,500 ft. At the destination end, 7 nm north 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, 7 nm north, 5:37 am CDT (10:37 UTC): remarks: KSAT base 2,300 ft, on top 4,000 ft. At the destination end, 7 nm north 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 6 forecast points nearest it (HSV, MEM, JAN, SHV, 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	220° at 13 kt	+12 kt		108 kt	6 h 12 min	1:10 pm CDT (18:10 UTC)
6,500 ft	220° at 12 kt	+12 kt	17 °C	108 kt	6 h 12 min	1:10 pm CDT (18:10 UTC)
8,500 ft	240° at 11 kt	+11 kt	13 °C	109 kt	6 h 08 min	1:06 pm CDT (18:06 UTC)
10,500 ft	250° at 10 kt	+10 kt	9 °C	110 kt	6 h 05 min	1:03 pm CDT (18:03 UTC)
12,500 ft	260° at 10 kt	+10 kt	6 °C	110 kt	6 h 05 min	1:03 pm CDT (18:03 UTC)
14,500 ft	260° at 11 kt	+11 kt	1 °C	109 kt	6 h 08 min	1:06 pm CDT (18:06 UTC)
16,500 ft	270° at 13 kt	+12 kt	-3 °C	108 kt	6 h 12 min	1:10 pm CDT (18:10 UTC)
18,000 ft FL180	270° at 14 kt	+13 kt	-6 °C	107 kt	6 h 15 min	1:13 pm CDT (18:13 UTC)
24,000 ft FL240	270° at 14 kt	+13 kt	-15 °C	107 kt	6 h 15 min	1:13 pm CDT (18:13 UTC)
30,000 ft FL300	310° at 29 kt	+13 kt	-30 °C	107 kt	6 h 15 min	1:13 pm CDT (18:13 UTC)
34,000 ft FL340	320° at 32 kt	+8 kt	-40 °C	112 kt	5 h 58 min	12:56 pm CDT (17:56 UTC)
39,000 ft FL390	330° at 35 kt	+1 kt	-51 °C	119 kt	5 h 37 min	12:35 pm CDT (17:35 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
HSV	used from 0 nm out; 25 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°
MEM	used from 100 nm out; 89 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°
JAN	used from 150 nm out; 66 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°
SHV	used from 299 nm out; 62 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°
CLL	used from 449 nm out; 68 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 599 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
HSV Huntsville, AL	departure	VFR Sky: scattered clouds at 13,000 feet	from the east (100°) at 4 knots	10+ mi	none	628 ft	6:53 am CDT (11:53 UTC)
MSL Muscle Shoals, AL	30 nm out, 23 nm northwest of the line	marginal VFR Weather: mist	calm	4 mi	none	550 ft	11:53 UTC
TUP Tupelo, MS	100 nm out, 21 nm northwest of the line, tower	marginal VFR Weather: mist	calm	4 mi	none	346 ft	11:53 UTC
GWO Greenwood, MS	180 nm out, 7 nm north of the line, tower	VFR	calm	10+ mi	none	162 ft	11:53 UTC
IDL Indianola, MS	210 nm out, 20 nm north of the line	no report just now				126 ft
MLU Monroe, LA	289 nm out, 4 nm southwest of the line, tower	VFR	calm	9 mi	none	78 ft	11:53 UTC
IER Natchitoches, LA	359 nm out, 19 nm south of the line	low IFR Sky: sky obscured at 200 feet Weather: fog	calm	0.25 mi	200 ft	121 ft	11:55 UTC
LFK Lufkin, TX	449 nm out, 6 nm south of the line	VFR	from the east-southeast (120°) at 4 knots	10+ mi	none	295 ft	11:53 UTC
UTS Huntsville, TX	499 nm out, 11 nm south of the line	VFR	from the east-southeast (120°) at 5 knots	10+ mi	none	362 ft	11:53 UTC
CLL College Station, TX	539 nm out, 3 nm west of the line, tower	VFR	from the east-southeast (120°) at 7 knots	10+ mi	none	320 ft	11:53 UTC
HYI Austin, TX	629 nm out, 3 nm northwest of the line, tower	marginal VFR Sky: overcast at 1,800 feet	calm	10+ mi	1,800 ft	594 ft	11:56 UTC
SAT San Antonio, TX	destination	marginal VFR Sky: a broken layer at 1,600 feet, a broken layer at 2,500 feet	from the east (100°) at 4 knots	10+ mi	1,600 ft	809 ft	6:51 am CDT (11:51 UTC)

The highest airport on this list sits at 809 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, 12:35 pm CDT (17:35 UTC)

Wind from the south-southeast at 12 knots, visibility more than 6 miles, a broken layer at 3,500 feet VFR

The whole forecast for SAT

From Mon 7:00 am CDT (12:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, a broken layer at 1,500 feet
At times between Mon 8:00 am CDT (13:00 UTC) and 11:00 am CDT (16:00 UTC): a broken layer at 2,500 feet
From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southeast at 12 knots, visibility more than 6 miles, a broken layer at 3,500 feet
From Tue 1:00 am CDT (06:00 UTC): wind from the south-southeast at 9 knots, visibility more than 6 miles, overcast at 1,500 feet
At times between Tue 4:00 am CDT (09:00 UTC) and 7:00 am CDT (12:00 UTC): a broken layer at 800 feet

The forecast for HSV, the departure

From Mon 7:00 am CDT (12:00 UTC): wind light and variable, visibility 6 miles, mist, clear skies
From Mon 10:00 am CDT (15:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, clear skies
From Mon 7:00 pm CDT (00:00 UTC): wind light and variable, visibility more than 6 miles, clear skies

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 HSV 6:16 pm CDT (23:16 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

Radar now, the lower Mississippi valley · loop National Weather Service

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: Huntsville Intl-Carl T Jones Field, San Antonio International.