Austin-Bergstrom International to Bozeman Yellowstone International AUS → BZN
1,129 nautical miles (1,299 statute miles) northwest on a straight line, true course 330°, about 326° magnetic at the departure end (variation 4E). At 120 knots that is 8 h 04 min at the quickest height in today's winds (4,500 ft, a 20-knot tailwind), arriving about 4:13 am MDT (10:13 UTC), after sunset at the destination. Right now AUS is VFR, wind from the south-southeast (150°) at 9 knots; BZN is IFR, 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: 23 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
- SIGMET 6W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 10:55 pm CDT (03:55 UTC). Near the route, 529 nm along the route.
as issued
WSUS33 KKCI 120155 MKCW WST 120155 CONVECTIVE SIGMET 6W VALID UNTIL 0355Z CO NM FROM 50SSW DEN-30NNE TBE-50SSW CME-50E SJN-20NE DVC-50SSW DEN AREA TS MOV FROM 23040KT. TOPS TO FL340.
- SIGMET 8W: thunderstorms (a convective SIGMET) up to 35,000 ft, moving from the southwest at 40 knots, until 10:55 pm CDT (03:55 UTC). Near the route, 959 nm along the route.
as issued
WSUS33 KKCI 120155 MKCW WST 120155 CONVECTIVE SIGMET 8W VALID UNTIL 0355Z CO MT WY FROM 40N SHR-60WNW RAP-20ENE CYS-30SW CYS-10NW BOY-40N SHR AREA TS MOV FROM 22040KT. TOPS TO FL350.
- 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 route from 480 to 519 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 529 to 1099 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 549 nm of the route.
- AIRMET TANGO 1W: 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 route from 709 to 1009 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 729 to 729 nm out.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 829 nm along the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 270 nm of the route.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 869 to 1089 nm out.
- AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 180 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 AUS.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- BCS1 at 24,000 ft, 5 nm southeast, 8:30 pm CDT (01:30 UTC): moderate turbulence from 22,000 ft to 24,000 ft, remarks: during the climb ZDVWC-05. 699 nm along the route, 5 nm southeast of the line.
as filed, and in English
DEN UA /OV DVV270030/TM 0130/FL240/TP BCS1/TB MOD 220-240/RM DURC ZDVWC-05
- Report
- a routine report filed through DEN
- Where
- 30 nm west (270°) of DVV
- Time
- 01:30 UTC
- Height
- at 24,000 ft
- Aircraft
- BCS1
- Turbulence
- moderate from 22,000 ft to 24,000 ft
- Remarks
- during the climb ZDVWC-05
- BCS3 at 24,000 ft, 19 nm northeast, 6:28 pm CDT (23:28 UTC): moderate turbulence from 22,000 ft to 24,000 ft, remarks: during the descent. 719 nm along the route, 19 nm northeast of the line.
as filed, and in English
DEN UA /OV DEN320045/TM 2328/FL240/TP BCS3/TB MOD 240-220/RM DURD
- Report
- a routine report filed through DEN
- Where
- 45 nm northwest (320°) of DEN
- Time
- 23:28 UTC
- Height
- at 24,000 ft
- Aircraft
- BCS3
- Turbulence
- moderate from 24,000 ft to 22,000 ft
- Remarks
- during the descent
- B39M at 32,000 ft, 30 nm southwest, 6:58 pm CDT (23:58 UTC): moderate chop turbulence, no icing, remarks: moderate mtw a 30-knot loss of airspeed ZDVWC-14. 739 nm along the route, 30 nm southwest of the line.
as filed, and in English
EEO UA /OV EKR069073/TM 2358/FL320/TP B39M/TB OCNL MOD CHOP/IC NEG/RM MOD MTW +/-30KT ZDVWC-14
- Report
- a routine report filed through EEO
- Where
- 73 nm east (069°) of EKR
- Time
- 23:58 UTC
- Height
- at 32,000 ft
- Aircraft
- B39M
- Turbulence
- occasional moderate chop
- Icing
- none
- Remarks
- moderate mtw a 30-knot loss of airspeed ZDVWC-14
- CRJ2 at 19,000 ft, 5 nm north, 7:47 pm CDT (00:47 UTC): moderate chop turbulence, remarks: ZDVWC-13. 749 nm along the route, 5 nm north of the line.
as filed, and in English
EGE UA /OV RLG010052/TM 0047/FL190/TP CRJ2/TB COSN MOD CHOP/RM ZDVWC-13
- Report
- a routine report filed through EGE
- Where
- 52 nm north (010°) of RLG
- Time
- 00:47 UTC
- Height
- at 19,000 ft
- Aircraft
- CRJ2
- Turbulence
- cosn moderate chop
- Remarks
- ZDVWC-13
- S22T at 15,000 ft, 28 nm southwest, 8:47 pm CDT (01:47 UTC): moderate rime icing above 15,000 ft, -5 °C. 1029 nm along the route, 28 nm southwest of the line.
as filed, and in English
JAC UA /OV DNW010020/TM 0147/FL150/TP S22T/TA M05/IC MOD RIME 150 /ZLC
- Report
- a routine report filed through JAC
- Where
- 20 nm north (010°) of DNW
- Time
- 01:47 UTC
- Height
- at 15,000 ft
- Aircraft
- S22T
- Temperature
- −5 °C
- Icing
- moderate rime at 15,000 ft zlc
- A320 at 35,000 ft, 8 nm west, 7:43 pm CDT (00:43 UTC): light chop turbulence, remarks: ZFW47. 300 nm along the route, 8 nm west of the line.
as filed, and in English
CDS UA /OV CDS270030/TM 0043/FL350/TP A320/TB LGT CHOP/RM ZFW47
- Report
- a routine report filed through CDS
- Where
- 30 nm west (270°) of CDS
- Time
- 00:43 UTC
- Height
- at 35,000 ft
- Aircraft
- A320
- Turbulence
- light chop
- Remarks
- ZFW47
- A21N at 31,000 ft, 25 nm southwest, 7:24 pm CDT (00:24 UTC): remarks: mountain wave +/-10-20KT ZDVWC-29. 589 nm along the route, 25 nm southwest of the line.
as filed, and in English
PUB UA /OV PUB/TM 0024/FL310/TP A21N/RM MTN WAVE +/-10-20KT ZDVWC-29
- Report
- a routine report filed through PUB
- Where
- over PUB
- Time
- 00:24 UTC
- Height
- at 31,000 ft
- Aircraft
- A21N
- Remarks
- mountain wave +/-10-20KT ZDVWC-29
- B737 at 25,000 ft, 26 nm southwest, 7:29 pm CDT (00:29 UTC): light rime icing, 0 °C, remarks: during the climb ZDVWC-29. 629 nm along the route, 26 nm southwest of the line.
as filed, and in English
COS UA /OV BRK242015/TM 0029/FL250/TP B737/SK TOP280/TA 00/IC LGT RIME/RM DURC ZDVWC-29
- Report
- a routine report filed through COS
- Where
- 15 nm southwest (242°) of BRK
- Time
- 00:29 UTC
- Height
- at 25,000 ft
- Aircraft
- B737
- Sky
- TOP280
- Temperature
- 0 °C
- Icing
- light rime
- Remarks
- during the climb ZDVWC-29
- GLF6 at 40,000 ft, 11 nm southwest, 7:48 pm CDT (00:48 UTC): light to moderate chop turbulence, remarks: ZDVWC-46. 639 nm along the route, 11 nm southwest of the line.
as filed, and in English
COS UA /OV COS340020/TM 0048/FL400/TP GLF6/TB LGT-MOD CHOP/RM ZDVWC-46
- Report
- a routine report filed through COS
- Where
- 20 nm north (340°) of COS
- Time
- 00:48 UTC
- Height
- at 40,000 ft
- Aircraft
- GLF6
- Turbulence
- light to moderate chop
- Remarks
- ZDVWC-46
- E55P at 38,000 ft, 22 nm southwest, 8:23 pm CDT (01:23 UTC): light chop turbulence, remarks: ZDVWC-05. 649 nm along the route, 22 nm southwest of the line.
as filed, and in English
DEN UA /OV FQF200040/TM 0123/FL380/TP E55P/TB LGT CHOP/RM ZDVWC-05
- Report
- a routine report filed through DEN
- Where
- 40 nm south (200°) of FQF
- Time
- 01:23 UTC
- Height
- at 38,000 ft
- Aircraft
- E55P
- Turbulence
- light chop
- Remarks
- ZDVWC-05
- B737 at 14,000 ft, 4 nm northeast, 7:20 pm CDT (00:20 UTC): light to moderate turbulence, remarks: light to moderate from 14,000 ft to 16,000 ft occn light above 16,000 ft. 649 nm along the route, 4 nm northeast of the line.
as filed, and in English
DEN UA /OV DEN170025/TM 0020/FL140/TP B737/TB LGT-MOD/RM LGT-MOD 140-160 OCCN LGT ABOVE 160
- Report
- a routine report filed through DEN
- Where
- 25 nm south (170°) of DEN
- Time
- 00:20 UTC
- Height
- at 14,000 ft
- Aircraft
- B737
- Turbulence
- light to moderate
- Remarks
- light to moderate from 14,000 ft to 16,000 ft occn light above 16,000 ft
- A320 at 8,000 ft, 43 nm northeast, 6:42 pm CDT (23:42 UTC): light chop turbulence from 8,000 ft to 16,000 ft, remarks: during the climb. 659 nm along the route, 43 nm northeast of the line.
as filed, and in English
DEN UA /OV DEN080030/TM 2342/FL080/TP A320/TB LGT CHOP 080-160/RM DURC
- Report
- a routine report filed through DEN
- Where
- 30 nm east (080°) of DEN
- Time
- 23:42 UTC
- Height
- at 8,000 ft
- Aircraft
- A320
- Turbulence
- light chop from 8,000 ft to 16,000 ft
- Remarks
- during the climb
- B737 descending, 17 nm northeast, 8:23 pm CDT (01:23 UTC): no turbulence up to 10,000 ft. 669 nm along the route, 17 nm northeast of the line.
as filed, and in English
DEN UA /OV DEN/TM 0123/FLDURD/TP B737/TB NEG BLO 100
- Report
- a routine report filed through DEN
- Where
- over DEN
- Time
- 01:23 UTC
- Height
- during the descent
- Aircraft
- B737
- Turbulence
- no below 10,000 ft
- A321 descending, 17 nm northeast, 7:26 pm CDT (00:26 UTC): no turbulence up to 10,000 ft. 669 nm along the route, 17 nm northeast of the line.
as filed, and in English
DEN UA /OV DEN/TM 0026/FLDURD/TP A321/TB NEG BLO 100
- Report
- a routine report filed through DEN
- Where
- over DEN
- Time
- 00:26 UTC
- Height
- during the descent
- Aircraft
- A321
- Turbulence
- no below 10,000 ft
7 more routine reports are on the map.
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 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 11 forecast points nearest it (SAT, ABI, LBB, AMA, GCK, PUB, DEN, RKS, LND, BIL, DLN). 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 | 170° at 21 kt | −20 kt | 18 °C | 140 kt | 8 h 04 min | 4:13 am MDT (10:13 UTC) |
| 6,500 ft | 180° at 21 kt | −18 kt | 17 °C | 138 kt | 8 h 11 min | 4:20 am MDT (10:20 UTC) |
| 8,500 ft | 200° at 23 kt | −15 kt | 13 °C | 135 kt | 8 h 22 min | 4:31 am MDT (10:31 UTC) |
| 10,500 ft | 200° at 26 kt | −14 kt | 9 °C | 134 kt | 8 h 26 min | 4:35 am MDT (10:35 UTC) |
| 12,500 ft | 210° at 30 kt | −13 kt | 5 °C | 133 kt | 8 h 29 min | 4:38 am MDT (10:38 UTC) |
| 14,500 ft | 220° at 32 kt | −10 kt | 0 °C | 130 kt | 8 h 41 min | 4:50 am MDT (10:50 UTC) |
| 16,500 ft | 220° at 34 kt | −8 kt | -4 °C | 128 kt | 8 h 49 min | 4:58 am MDT (10:58 UTC) |
| 18,000 ft FL180 | 230° at 36 kt | −6 kt | -7 °C | 126 kt | 8 h 58 min | 5:07 am MDT (11:07 UTC) |
| 24,000 ft FL240 | 230° at 39 kt | −6 kt | -18 °C | 126 kt | 8 h 58 min | 5:07 am MDT (11:07 UTC) |
| 30,000 ft FL300 | 230° at 47 kt | −5 kt | -31 °C | 125 kt | 9 h 02 min | 5:11 am MDT (11:11 UTC) |
| 34,000 ft FL340 | 240° at 54 kt | +7 kt | -39 °C | 113 kt | 9 h 59 min | 6:08 am MDT (12:08 UTC) |
| 39,000 ft FL390 | 250° at 54 kt | +14 kt | -49 °C | 106 kt | 10 h 39 min | 6:48 am MDT (12:48 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SAT | used from 0 nm out; 68 nm from the line | 130/22 | 140/24 18° | 170/19 13° | 190/13 7° | 240/15 -4° | 220/14 -13° | 270/11 -28° | 280/10 -40° | 310/18 -51° |
| ABI | used from 50 nm out; 94 nm from the line | 180/26 17° | 220/18 12° | 230/25 8° | 230/28 -5° | 240/29 -14° | 250/35 -28° | 270/37 -39° | 280/37 -51° | |
| LBB | used from 250 nm out; 73 nm from the line | 180/26 20° | 210/21 13° | 230/21 7° | 250/25 -5° | 250/34 -16° | 250/52 -28° | 260/47 -38° | 260/49 -50° | |
| AMA | used from 300 nm out; 42 nm from the line | 190/28 | 220/26 14° | 230/27 7° | 250/24 -6° | 250/32 -16° | 240/51 -28° | 250/52 -38° | 250/51 -50° | |
| GCK | used from 450 nm out; 110 nm from the line | 200/35 21° | 220/34 14° | 240/30 8° | 240/27 -6° | 240/31 -17° | 240/53 -30° | 250/55 -39° | 250/60 -50° | |
| PUB | used from 500 nm out; 73 nm from the line | 210/24 16° | 210/28 8° | 230/43 -8° | 240/42 -21° | 240/77 -30° | 240/72 -36° | 250/51 -47° | ||
| DEN | used from 649 nm out; 18 nm from the line | 190/31 16° | 210/32 7° | 240/41 -8° | 230/47 -21° | 240/56 -32° | 250/65 -37° | 250/61 -47° | ||
| RKS | used from 799 nm out; 97 nm from the line | 190/43 | 210/65 3° | 210/57 -9° | 210/56 -21° | 210/47 -33° | 230/63 -37° | 240/77 -46° | ||
| LND | used from 849 nm out; 57 nm from the line | 180/33 10° | 190/50 3° | 210/59 -9° | 200/50 -21° | 190/41 -34° | 230/55 -39° | 240/65 -47° | ||
| BIL | used from 999 nm out; 96 nm from the line | 080/24 | 130/14 -1° | 180/33 0° | 210/43 -10° | 220/58 -21° | 200/55 -36° | 220/75 -44° | 240/83 -48° | |
| DLN | used from 1099 nm out; 71 nm from the line | 080/10 -3° | 180/8 -3° | 180/23 -14° | 200/58 -22° | 200/80 -36° | 220/85 -41° | 230/81 -45° |
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 |
|---|---|---|---|---|---|---|---|
| AUS Austin, TX | departure | VFR Sky: a few clouds at 12,000 feet, a few clouds at 25,000 feet | from the south-southeast (150°) at 9 knots | 10+ mi | none | 541 ft | 8:53 pm CDT (01:53 UTC) |
| GTU Georgetown, TX | 30 nm out, 15 nm east of the line, tower | VFR | from the south-southeast (150°) at 9 knots, gusting to 17 | 10+ mi | none | 789 ft | 01:55 UTC |
| ABI Abilene, TX | 170 nm out, 21 nm southwest of the line, tower | VFR | from the south-southeast (160°) at 13 knots | 10+ mi | none | 1,790 ft | 01:52 UTC |
| CDS Childress, TX | 290 nm out, 17 nm east of the line | VFR | from the south-southeast (150°) at 7 knots | 10+ mi | none | 1,953 ft | 01:53 UTC |
| AMA Amarillo, TX | 360 nm out, 17 nm west of the line, tower | VFR | from the south (170°) at 19 knots, gusting to 27 | 10+ mi | none | 3,606 ft | 01:53 UTC |
| LHX La Junta, CO | 549 nm out, 5 nm north of the line | VFR | from the southwest (230°) at 6 knots | 10+ mi | none | 4,228 ft | 15:53 UTC |
| APA Denver, CO | 659 nm out, 5 nm north of the line, tower | VFR Sky: a few clouds at 14,000 feet, a broken layer at 22,000 feet | from the south-southwest (210°) at 19 knots, gusting to 28 | 10+ mi | 22,000 ft | 5,884 ft | 01:53 UTC |
| BJC Denver, CO | 689 nm out, 3 nm east of the line, tower | VFR | from the south-southwest (210°) at 12 knots, gusting to 15 | 10+ mi | none | 5,673 ft | 01:45 UTC |
| SAA Saratoga, WY | 809 nm out, 8 nm southwest of the line | reported, no category | from the south (180°) at 30 knots, gusting to 38 | 7 mi | none | 7,014 ft | 01:50 UTC |
| RIW Riverton, WY | 929 nm out, 8 nm southwest of the line | marginal VFR Sky: a broken layer at 1,400 feet | from the northeast (040°) at 7 knots | 10+ mi | 1,400 ft | 5,516 ft | 01:53 UTC |
| LVM Livingston, MT | 1109 nm out, 20 nm northeast of the line | low IFR Sky: a broken layer at 400 feet, overcast at 1,800 feet Weather: light snow, mist | from the east (080°) at 17 knots | 1.75 mi | 400 ft | 4,659 ft | 01:53 UTC |
| BZN Bozeman, MT | destination | IFR Sky: a few clouds at 600 feet, overcast at 1,500 feet Weather: light snow, mist | calm | 1.25 mi | 1,500 ft | 4,473 ft | 8:03 pm MDT (02:03 UTC) |
The highest airport on this list sits at 7,014 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BZN when you get there the forecast at the estimated arrival, 4:13 am MDT (10:13 UTC)
Wind light and variable, visibility more than 6 miles, overcast at 800 feet IFR
The whole forecast for BZN
- From Sun 6:00 pm MDT (00:00 UTC): wind light and variable, visibility ½ mile, snow, fog, overcast at 300 feet
- At times between Sun 9:00 pm MDT (03:00 UTC) and 12:00 am MDT (06:00 UTC): visibility 2 miles, light snow, mist, scattered clouds at 300 feet, overcast at 1,200 feet
- From Mon 12:00 am MDT (06:00 UTC): wind from the west at 7 knots, visibility 2 miles, light snow, mist, overcast at 800 feet
- At times between Mon 12:00 am MDT (06:00 UTC) and 3:00 am MDT (09:00 UTC): visibility 6 miles, light snow, mist, overcast at 800 feet
- From Mon 3:00 am MDT (09:00 UTC): wind light and variable, visibility more than 6 miles, overcast at 800 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 800 feet, overcast at 2,000 feet
- From Mon 5:00 pm MDT (23:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 1,500 feet, a broken layer at 11,000 feet
The forecast for AUS, the departure
- From Sun 7:00 pm CDT (00:00 UTC): wind from the south at 14 knots, visibility more than 6 miles, a few clouds at 6,000 feet, scattered clouds at 25,000 feet
- From Sun 10:00 pm CDT (03:00 UTC): wind from the south-southeast at 6 knots, visibility more than 6 miles, scattered clouds at 1,500 feet
- From Mon 7:00 am CDT (12:00 UTC): wind from the south-southeast at 3 knots, visibility more than 6 miles, a broken layer at 1,500 feet
- From Mon 12:00 pm CDT (17:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a broken layer at 2,500 feet
- From Mon 2:00 pm CDT (19:00 UTC): wind from the south at 13 knots, visibility more than 6 miles, a broken layer at 4,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/5849 Austin, TX, Friday, October 2, 2026 through Monday, October 12, 2026 UTC 3 nm from the route, at the departure end · drones kept away from a public gathering · until 12 October · ZHU
- 6/8770 COLORADO SPRINGS, CO, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 21 nm from the route, 639 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 12 October · ZDV
Daylight
Sunset at AUS 7:03 pm CDT (00:03 UTC), at BZN 6:44 pm MDT (00:44 UTC) (civil twilight ends 7:14 pm MDT (01:14 UTC)). At 120 knots the arrival at BZN is before sunrise there (7:36 am MDT (13:36 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: Austin-Bergstrom International, Bozeman Yellowstone International.