Plan a flight · Mon 8:02 am CDT (13:02 UTC)

San Antonio International to Joslin Fld/Magic Valley Regional SAT → TWF

1,096 nautical miles (1,261 statute miles) northwest on a straight line, true course 319°, about 315° magnetic at the departure end (variation 4E). At 120 knots that is 8 h 42 min at the quickest height in today's winds (4,500 ft, a 6-knot tailwind), arriving about 3:44 pm MDT (21:44 UTC). Right now SAT is marginal VFR, wind from the east-southeast (110°) at 5 knots; TWF is VFR, wind from the west-southwest (240°) at 6 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: 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

SIGMET W23W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the southwest at 20 knots, until 8:55 am CDT (13:55 UTC). Over the route from 977 to 1036 nm out.
as issued
```
WSUS33 KKCI 121155
MKCW WST 121155
CONVECTIVE SIGMET 23W
VALID UNTIL 1355Z
UT ID
FROM 20WSW PIH-20NE MLD-30SW SLC-20NW BVL-20WSW PIH
AREA TS MOV FROM 24020KT. TOPS TO FL270.
```
AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 468 to 917 nm out.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 498 to 737 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 409 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the last 349 nm of the route.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 747 to 947 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 30 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

PC12 at 17,000 ft, 33 nm southwest, 7:40 am CDT (12:40 UTC): moderate rime icing, -13 °C. 897 nm along the route, 33 nm southwest of the line.
as filed, and in English
```
PVU UA /OV FFU134026/TM 1240/FL170/TP PC12/TA M13 /IC MOD RIME/ZLC
```
Report
a routine report filed through PVU
Where
26 nm southeast (134°) of FFU
Time
12:40 UTC
Height
at 17,000 ft
Aircraft
PC12
Temperature
−13 °C
Icing
moderate rime/zlc
B739 at 27,000 ft, 42 nm west, 7:56 am CDT (12:56 UTC): moderate chop turbulence. At the destination end, 42 nm west of the line.
as filed, and in English
```
TWF UA /OV TWF247042/TM 1256/FL270/TP B739/TB MOD CHOP/ZLC
```
Report
a routine report filed through TWF
Where
42 nm southwest (247°) of TWF
Time
12:56 UTC
Height
at 27,000 ft
Aircraft
B739
Turbulence
moderate chop/zlc
B737 at 2,000 ft, 7 nm north, 7:15 am CDT (12:15 UTC): overcast from 2,000 ft to 3,800 ft. At the departure end, 7 nm north of the line.
as filed, and in English
```
SAT UA /OV SAT/TM 1215/FL020/TP B737/SK OVC020 TOP038
```
Report
a routine report filed through SAT
Where
over SAT
Time
12:15 UTC
Height
at 2,000 ft
Aircraft
B737
Sky
overcast from 2,000 ft, tops 3,800 ft
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 departure 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 departure 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
B737 at 38,000 ft, 32 nm northeast, 6:05 am CDT (11:05 UTC): light chop turbulence, wind 306° at 27 knots. 100 nm along the route, 32 nm northeast of the line.
as filed, and in English
```
BWD UA /OV SJT094066/TM 1105/FL380/TP B737/WV 306027KT/TB LGT CHOP CONS/RM AWC-WEB
```
Report
a routine report filed through BWD
Where
66 nm east (094°) of SJT
Time
11:05 UTC
Height
at 38,000 ft
Aircraft
B737
Wind
from 306° at 27 knots
Turbulence
light chop continuous
Remarks
E170 at 20,000 ft, 40 nm southwest, 6:49 am CDT (11:49 UTC): light chop turbulence, remarks: ZFW82. 309 nm along the route, 40 nm southwest of the line.
as filed, and in English
```
HOB UA /OV HOB030020/TM 1149/FL200/TP E170/TB CONS LGT CHOP/RM ZFW82
```
Report
a routine report filed through HOB
Where
20 nm northeast (030°) of HOB
Time
11:49 UTC
Height
at 20,000 ft
Aircraft
E170
Turbulence
continuous light chop
Remarks
ZFW82
A359 at 38,000 ft, 37 nm northeast, 5:13 am CDT (10:13 UTC): light chop turbulence, remarks: ZDVWC-37. 678 nm along the route, 37 nm northeast of the line.
as filed, and in English
```
GUC UA /OV HBU185015/TM 1013/FL380/TP A359/TB CONS LGT CHOP/RM ZDVWC-37
```
Report
a routine report filed through GUC
Where
15 nm south (185°) of HBU
Time
10:13 UTC
Height
at 38,000 ft
Aircraft
A359
Turbulence
continuous light chop
Remarks
ZDVWC-37
PC12 at 5,000 ft, 31 nm northeast, 6:23 am CDT (11:23 UTC): light to moderate turbulence, no icing, remarks: during the descent zdvwc. 757 nm along the route, 31 nm northeast of the line.
as filed, and in English
```
GJT UA /OV GJT/TM 1123/FL050/TP PC12/TB LGT-MOD/IC NEG/RM DURD. ZDVWC
```
Report
a routine report filed through GJT
Where
over GJT
Time
11:23 UTC
Height
at 5,000 ft
Aircraft
PC12
Turbulence
light to moderate
Icing
none
Remarks
during the descent zdvwc
E75L at 17,000 ft, 34 nm southwest, 7:20 am CDT (12:20 UTC): light chop turbulence, light rime icing from 15,500 ft to 18,000 ft, -14 °C, remarks: during the descent. 907 nm along the route, 34 nm southwest of the line.
as filed, and in English
```
SLC UA /OV FFU140020/TM 1220/FL170/TP E75L/TA M14/TB LGTCHOP/IC LGT RIME 180-155/RM DURD
```
Report
a routine report filed through SLC
Where
20 nm southeast (140°) of FFU
Time
12:20 UTC
Height
at 17,000 ft
Aircraft
E75L
Temperature
−14 °C
Turbulence
lgtchop
Icing
light rime from 18,000 ft to 15,500 ft
Remarks
during the descent

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 10 forecast points nearest it (SAT, ABI, LBB, TCC, ABQ, ALS, FMN, GJT, SLC, PIH). 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	210° at 18 kt	−6 kt	20 °C	126 kt	8 h 42 min	3:44 pm MDT (21:44 UTC)
6,500 ft	210° at 19 kt	−5 kt	18 °C	125 kt	8 h 46 min	3:48 pm MDT (21:48 UTC)
8,500 ft	220° at 19 kt	−3 kt	12 °C	123 kt	8 h 55 min	3:57 pm MDT (21:57 UTC)
10,500 ft	220° at 24 kt	−1 kt	6 °C	121 kt	9 h 03 min	4:05 pm MDT (22:05 UTC)
12,500 ft	220° at 29 kt	−1 kt	2 °C	121 kt	9 h 03 min	4:05 pm MDT (22:05 UTC)
14,500 ft	220° at 32 kt	−1 kt	-2 °C	121 kt	9 h 03 min	4:05 pm MDT (22:05 UTC)
16,500 ft	220° at 36 kt	−1 kt	-7 °C	121 kt	9 h 03 min	4:05 pm MDT (22:05 UTC)
18,000 ft FL180	220° at 39 kt	−2 kt	-10 °C	122 kt	8 h 59 min	4:01 pm MDT (22:01 UTC)
24,000 ft FL240	230° at 51 kt	+6 kt	-19 °C	114 kt	9 h 37 min	4:39 pm MDT (22:39 UTC)
30,000 ft FL300	230° at 63 kt	+7 kt	-29 °C	113 kt	9 h 42 min	4:44 pm MDT (22:44 UTC)
34,000 ft FL340	240° at 59 kt	+12 kt	-36 °C	108 kt	10 h 09 min	5:11 pm MDT (23:11 UTC)
39,000 ft FL390	240° at 50 kt	+13 kt	-47 °C	107 kt	10 h 15 min	5:17 pm MDT (23:17 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°
ABI	used from 100 nm out; 81 nm from the line		200/30 19°	220/12 16°	220/11 9°	230/15 -5°	250/26 -15°	250/39 -28°	270/36 -38°	280/30 -51°
LBB	used from 199 nm out; 83 nm from the line		220/25 21°	230/20 15°	220/20 7°	230/36 -6°	240/50 -15°	240/59 -28°	260/52 -37°	260/45 -50°
TCC	used from 349 nm out; 62 nm from the line		240/20	230/22 13°	230/27 6°	230/40 -7°	240/55 -18°	240/74 -27°	240/68 -37°	250/64 -49°
ABQ	used from 498 nm out; 80 nm from the line			220/19 9°	220/35 3°	230/50 -8°	240/64 -19°	230/83 -26°	230/85 -36°	230/80 -48°
ALS	used from 548 nm out; 54 nm from the line				240/35 3°	230/54 -9°	240/66 -19°	230/85 -26°	240/87 -34°	240/70 -47°
FMN	used from 648 nm out; 66 nm from the line			220/16 6°	220/39 1°	220/50 -10°	230/67 -23°	230/94 -29°	230/102 -35°	230/90 -46°
GJT	used from 698 nm out; 49 nm from the line			220/26 6°	230/39 0°	220/55 -13°	230/60 -23°	230/78 -31°	230/80 -35°	230/74 -44°
SLC	used from 847 nm out; 73 nm from the line		200/16	210/23 4°	220/34 -3°	210/40 -16°	220/66 -23°	220/64 -31°	220/57 -36°	220/50 -43°
PIH	used from 1046 nm out; 77 nm from the line		070/8	150/19 1°	180/32 -4°	210/44 -17°	210/37 -28°	210/74 -31°	220/68 -35°	220/60 -43°

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 1,500 feet, a broken layer at 2,600 feet	from the east-southeast (110°) at 5 knots	10+ mi	1,500 ft	809 ft	7:51 am CDT (12:51 UTC)
ERV Kerrville, TX	40 nm out, 7 nm southwest of the line	marginal VFR Sky: overcast at 1,000 feet	from the south-southeast (160°) at 7 knots	10+ mi	1,000 ft	1,616 ft	12:55 UTC
SJT San Angelo, TX	149 nm out, 8 nm southwest of the line, tower	marginal VFR Sky: a broken layer at 1,700 feet, overcast at 2,700 feet	from the south (170°) at 8 knots	10+ mi	1,700 ft	1,918 ft	12:51 UTC
BFE Brownfield, TX	289 nm out, 2 nm north of the line	no report just now				3,264 ft
PRZ Portales, NM	379 nm out, 6 nm south of the line	no report just now				4,077 ft
LVS Las Vegas, NM	498 nm out, 3 nm southwest of the line	reported, no category	from the south-southeast (150°) at 12 knots	10+ mi	none	6,877 ft	12:53 UTC
PSO Pagosa Springs, CO	638 nm out, 4 nm southeast of the line	VFR Sky: scattered clouds at 4,000 feet, a broken layer at 5,000 feet, overcast at 8,000 feet	from the east-northeast (070°) at 2 knots	10+ mi	5,000 ft	7,663 ft	12:55 UTC
TEX Telluride, CO	688 nm out, 3 nm northwest of the line	VFR Sky: a broken layer at 6,000 feet, a broken layer at 7,000 feet	from the south-southeast (150°) at 11 knots	10+ mi	6,000 ft	9,069 ft	12:55 UTC
PUC Price, UT	857 nm out, 18 nm southwest of the line	VFR	from the east-northeast (070°) at 4 knots	10+ mi	none	5,957 ft	12:53 UTC
SLC Salt Lake City, UT	947 nm out, 4 nm south of the line, tower	VFR Sky: a few clouds at 4,500 feet, a few clouds at 7,000 feet, scattered clouds at 10,000 feet, a broken layer at 14,000 feet	from the south (170°) at 14 knots, gusting to 23	10+ mi	14,000 ft	4,230 ft	12:54 UTC
BYI Burley, ID	1076 nm out, 23 nm northeast of the line	VFR Sky: a few clouds at 500 feet, scattered clouds at 3,000 feet, overcast at 5,000 feet Weather: light rain	calm	10+ mi	5,000 ft	4,153 ft	12:53 UTC
TWF Twin Falls, ID	destination	VFR Sky: overcast at 3,700 feet	from the west-southwest (240°) at 6 knots	10+ mi	3,700 ft	4,153 ft	6:53 am MDT (12:53 UTC)

The highest airport on this list sits at 9,069 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At TWF when you get there the forecast at the estimated arrival, 3:44 pm MDT (21:44 UTC)

Wind from the west-northwest at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 4,000 feet, overcast at 8,000 feet VFR

The whole forecast for TWF

From Mon 6:00 am MDT (12:00 UTC): wind from the southwest at 7 knots, visibility 6 miles, light rain, mist, scattered clouds at 1,500 feet, overcast at 2,500 feet
From Mon 10:00 am MDT (16:00 UTC): wind from the west at 7 knots, visibility 6 miles, light rain showers, mist, scattered clouds at 1,500 feet, a broken layer at 3,500 feet
From Mon 12:00 pm MDT (18:00 UTC): wind from the west-northwest at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 4,000 feet, overcast at 8,000 feet
From Mon 8:00 pm MDT (02:00 UTC): wind from the west-southwest at 8 knots, visibility more than 6 miles, showers nearby, overcast at 4,000 feet
From Tue 1:00 am MDT (07:00 UTC): wind from the west-southwest at 11 knots, gusting to 20, visibility 6 miles, light rain showers, mist, scattered clouds at 1,500 feet, overcast at 3,500 feet

The forecast for SAT, the departure

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

Temporary flight restrictions on the line or within 25 nm of it

6/4240 SAN ANGELO, TX, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local 2 nm from the route, 140 nm along the route · security · until 1 November · ZFW

Daylight

Sunset at SAT 7:05 pm CDT (00:05 UTC), at TWF 6:59 pm MDT (00:59 UTC) (civil twilight ends 7:27 pm MDT (01:27 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 southern Rockies · loop National Weather Service

Radar now, the Pacific Northwest · 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: San Antonio International, Joslin Fld/Magic Valley Regional.