San Antonio International to Huntsville Intl-Carl T Jones Field SAT → HSV
669 nautical miles (769 statute miles) northeast on a straight line, true course 060°, about 056° magnetic at the departure end (variation 4E). At 120 knots that is 5 h 02 min at the quickest height in today's winds (30,000 ft, a 13-knot tailwind), arriving about 8:44 am CDT (13:44 UTC). Right now SAT is marginal VFR, wind from the southeast (130°) at 6 knots; HSV is VFR, wind calm. 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, fog). Over the last 0 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 SAT.
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 6 forecast points nearest it (SAT, CLL, SHV, JAN, BHM, HSV). 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 13 kt | −12 kt | 132 kt | 5 h 04 min | 8:46 am CDT (13:46 UTC) | |
| 5,500 ft | 220° at 13 kt | −12 kt | 132 kt | 5 h 04 min | 8:46 am CDT (13:46 UTC) | |
| 7,500 ft | 230° at 11 kt | −11 kt | 14 °C | 131 kt | 5 h 06 min | 8:48 am CDT (13:48 UTC) |
| 9,500 ft | 250° at 10 kt | −10 kt | 11 °C | 130 kt | 5 h 09 min | 8:51 am CDT (13:51 UTC) |
| 11,500 ft | 250° at 9 kt | −9 kt | 8 °C | 129 kt | 5 h 11 min | 8:53 am CDT (13:53 UTC) |
| 13,500 ft | 260° at 10 kt | −10 kt | 4 °C | 130 kt | 5 h 09 min | 8:51 am CDT (13:51 UTC) |
| 15,500 ft | 270° at 12 kt | −11 kt | 0 °C | 131 kt | 5 h 06 min | 8:48 am CDT (13:48 UTC) |
| 17,500 ft | 270° at 13 kt | −12 kt | -5 °C | 132 kt | 5 h 04 min | 8:46 am CDT (13:46 UTC) |
| 18,000 ft FL180 | 270° at 14 kt | −12 kt | -6 °C | 132 kt | 5 h 04 min | 8:46 am CDT (13:46 UTC) |
| 24,000 ft FL240 | 270° at 13 kt | −11 kt | -15 °C | 131 kt | 5 h 06 min | 8:48 am CDT (13:48 UTC) |
| 30,000 ft FL300 | 310° at 29 kt | −13 kt | -30 °C | 133 kt | 5 h 02 min | 8:44 am CDT (13:44 UTC) |
| 34,000 ft FL340 | 320° at 32 kt | −7 kt | -40 °C | 127 kt | 5 h 16 min | 8:58 am CDT (13:58 UTC) |
| 39,000 ft FL390 | 330° at 35 kt | 0 | -51 °C | 120 kt | 5 h 34 min | 9:16 am CDT (14:16 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; 25 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° |
| CLL | used from 50 nm out; 52 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 200 nm out; 78 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° |
| JAN | used from 399 nm out; 67 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° |
| BHM | used from 549 nm out; 91 nm from the line | 310/19 | 310/15 16° | 320/19 11° | 330/15 5° | 330/23 -5° | 320/14 -18° | 320/36 -32° | 330/44 -40° | 340/36 -51° |
| HSV | used from 599 nm out; 45 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° |
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 |
|---|---|---|---|---|---|---|---|
| SAT San Antonio, TX | departure | marginal VFR Sky: a broken layer at 2,700 feet | from the southeast (130°) at 6 knots | 10+ mi | 2,700 ft | 809 ft | 3:07 am CDT (08:07 UTC) |
| HYI Austin, TX | 40 nm out, 3 nm northwest of the line, tower | VFR Sky: a few clouds at 2,300 feet | calm | 10+ mi | none | 594 ft | 07:56 UTC |
| CLL College Station, TX | 130 nm out, 3 nm west of the line, tower | VFR | from the southeast (140°) at 5 knots | 10+ mi | none | 320 ft | 07:53 UTC |
| UTS Huntsville, TX | 170 nm out, 11 nm south of the line | VFR | from the southeast (140°) at 6 knots | 10+ mi | none | 362 ft | 07:53 UTC |
| LFK Lufkin, TX | 220 nm out, 6 nm south of the line | VFR | calm | 10+ mi | none | 295 ft | 07:53 UTC |
| IER Natchitoches, LA | 309 nm out, 19 nm south of the line | VFR | calm | 10+ mi | none | 121 ft | 08:35 UTC |
| MLU Monroe, LA | 379 nm out, 4 nm southwest of the line, tower | VFR | from the south-southwest (210°) at 5 knots | 10+ mi | none | 78 ft | 07:53 UTC |
| IDL Indianola, MS | 459 nm out, 20 nm north of the line | no report just now | 126 ft | ||||
| GWO Greenwood, MS | 489 nm out, 7 nm north of the line, tower | VFR | calm | 10+ mi | none | 162 ft | 07:53 UTC |
| TUP Tupelo, MS | 569 nm out, 21 nm northwest of the line, tower | VFR | calm | 7 mi | none | 346 ft | 07:53 UTC |
| MSL Muscle Shoals, AL | 639 nm out, 23 nm northwest of the line | marginal VFR Weather: mist | calm | 3 mi | none | 550 ft | 08:32 UTC |
| HSV Huntsville, AL | destination | VFR | calm | 10+ mi | none | 628 ft | 2:53 am CDT (07:53 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 HSV when you get there the forecast at the estimated arrival, 8:44 am CDT (13:44 UTC)
Wind light and variable, visibility 6 miles, mist, clear skies VFR
The whole forecast for HSV
- From Mon 1:00 am CDT (06:00 UTC): wind light and variable, visibility 6 miles, mist, clear skies
- At times between Mon 3:00 am CDT (08:00 UTC) and 7:00 am CDT (12:00 UTC): visibility 2 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
The forecast for SAT, the departure
- From Mon 1:00 am CDT (06:00 UTC): wind from the southeast at 8 knots, visibility more than 6 miles, a few clouds at 1,500 feet, a few clouds at 25,000 feet
- From Mon 5:00 am CDT (10:00 UTC): wind from the southeast at 6 knots, visibility more than 6 miles, overcast at 1,500 feet
- From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southeast at 12 knots, visibility more than 6 miles, showers nearby, a broken layer at 3,500 feet
- From Tue 2:00 am CDT (07:00 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
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 SAT 7:05 pm CDT (00:05 UTC), at HSV 6:16 pm CDT (23:16 UTC) (civil twilight ends 6:41 pm CDT (23:41 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: San Antonio International, Huntsville Intl-Carl T Jones Field.