Plan a flight · Sun 7:48 pm CDT (00:48 UTC)

Hector International to Boise Air Trml/Gowen Field FAR → BOI

842 nautical miles (969 statute miles) west on a straight line, true course 263°, about 259° magnetic at the departure end (variation 4E). At 120 knots that is 6 h 23 min at the quickest height in today's winds (4,500 ft, a 12-knot tailwind), arriving about 1:11 am MDT (07:11 UTC), after sunset at the destination. Right now FAR is IFR, wind from the north (010°) at 15 knots; BOI 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

SIGMET W70W: thunderstorms (a convective SIGMET) up to 32,000 ft, moving from the southwest at 40 knots, until 8:55 pm CDT (01:55 UTC). Over the route from 396 to 505 nm out.

as issued

WSUS33 KKCI 112355
MKCW WST 112355
CONVECTIVE SIGMET 70W
VALID UNTIL 0155Z
MT WY
FROM 30SSW MLS-60WNW BFF-40SSE OCS-10S BPI-10S BIL-30SSW MLS
AREA TS MOV FROM 22040KT. TOPS TO FL320.

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 first 69 nm of the route.
AIRMET ZULU 4C: moderate icing up to 20,000 ft. Near the route, at the departure end.
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 route from 198 to 793 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 575 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 466 to 624 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 466 to 823 nm out.
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 505 to 605 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the last 218 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 FAR.

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

B738 at 33,000 ft, 7 nm south, 6:57 pm CDT (23:57 UTC): moderate chop turbulence from 31,000 ft to 33,000 ft. 644 nm along the route, 7 nm south of the line.
as filed, and in English
```
IDA UA /OV DBS015030/TM 2357/FL330/TP B738/TB MOD CHOP 310-330 /ZLC
```
Report
a routine report filed through IDA
Where
30 nm north (015°) of DBS
Time
23:57 UTC
Height
at 33,000 ft
Aircraft
B738
Turbulence
moderate chop from 31,000 ft to 33,000 ft zlc
C56X at 1,300 ft, 0 nm southwest, 6:17 pm CDT (23:17 UTC): overcast above 1,300 ft. At the departure end, 0 nm southwest of the line.
as filed, and in English
```
FAR UA /OV KFAR/TM 2317/FL013/TP C56X/SK OVC013
```
Report
a routine report filed through FAR
Where
over KFAR
Time
23:17 UTC
Height
at 1,300 ft
Aircraft
C56X
Sky
overcast from 1,300 ft
E170 at 6,000 ft, 10 nm south, 5:18 pm CDT (22:18 UTC): remarks: during the descent runway 36. At the departure end, 10 nm south of the line.
as filed, and in English
```
FAR UA /OV FAR/TM 2218/FL060/TP E170/SK TOP060-OVC014/RM DURD RWY 36
```
Report
a routine report filed through FAR
Where
over FAR
Time
22:18 UTC
Height
at 6,000 ft
Aircraft
E170
Sky
TOP060-OVC014
Remarks
during the descent runway 36
PC12 at 16,000 ft, 38 nm north, 7:12 pm CDT (00:12 UTC): light icing, -6 °C. 79 nm along the route, 38 nm north of the line.
as filed, and in English
```
JMS UA /OV JMS332028/TM 0012/FL160/TP PC12/TA M06/IC LGT CLR
```
Report
a routine report filed through JMS
Where
28 nm northwest (332°) of JMS
Time
00:12 UTC
Height
at 16,000 ft
Aircraft
PC12
Temperature
−6 °C
Icing
light clear
CRJ2 at 2,900 ft, 35 nm north, 7:05 pm CDT (00:05 UTC): a routine report with nothing remarked on. 238 nm along the route, 35 nm north of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 0005/FL029/TP CRJ2/SK BASE029
```
Report
a routine report filed through DIK
Where
over DIK
Time
00:05 UTC
Height
at 2,900 ft
Aircraft
CRJ2
Sky
BASE029
BE20 at 3,000 ft, 35 nm north, 5:56 pm CDT (22:56 UTC): no turbulence, no icing. 238 nm along the route, 35 nm north of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 2256/FL030/TP BE20/SK BASE031/TB NEG/IC NEG
```
Report
a routine report filed through DIK
Where
over DIK
Time
22:56 UTC
Height
at 3,000 ft
Aircraft
BE20
Sky
BASE031
Turbulence
none
Icing
none
TBM7 at 3,000 ft, 35 nm north, 4:55 pm CDT (21:55 UTC): no turbulence, no icing, 5 °C. 238 nm along the route, 35 nm north of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 2155/FL030/TP TBM7/SK BASE030-TOP043/ BASE060-TOP081/TA 05/TB NEG/IC NEG
```
Report
a routine report filed through DIK
Where
over DIK
Time
21:55 UTC
Height
at 3,000 ft
Aircraft
TBM7
Sky
BASE030-TOP043; BASE060-TOP081
Temperature
5 °C
Turbulence
none
Icing
none
C68A at 31,000 ft, 44 nm south, 4:49 pm CDT (21:49 UTC): a routine report with nothing remarked on. 723 nm along the route, 44 nm south of the line.
as filed, and in English
```
SUN UA /OV HLE060040/TM 2149/FL310/TP C68A/SK BASE074-TOP300 /ZLC
```
Report
a routine report filed through SUN
Where
40 nm northeast (060°) of HLE
Time
21:49 UTC
Height
at 31,000 ft
Aircraft
C68A
Sky
BASE074-TOP300; zlc
E550 at 21,000 ft, 32 nm south, 6:27 pm CDT (23:27 UTC): light turbulence, a few clouds above 7,000 ft, remarks: during the climb zlc. 763 nm along the route, 32 nm south of the line.
as filed, and in English
```
SUN UA /OV SUN/TM 2327/FL210/TP E550/SK FEW070/TB CONS LGT/RM DURC /ZLC
```
Report
a routine report filed through SUN
Where
over SUN
Time
23:27 UTC
Height
at 21,000 ft
Aircraft
E550
Sky
a few clouds from 7,000 ft
Turbulence
continuous light
Remarks
during the climb zlc
CL60 descending, 2 nm southeast, 6:00 pm CDT (23:00 UTC): remarks: + 10 knots on final. At the destination end, 2 nm southeast of the line.
as filed, and in English
```
BOI UA /OV BOI/TM 2300/FLDURD/TP CL60/RM +/- 10 KTS ON FINAL
```
Report
a routine report filed through BOI
Where
over BOI
Time
23:00 UTC
Height
during the descent
Aircraft
CL60
Remarks
+ 10 knots on final

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 7 forecast points nearest it (GFK, ABR, DIK, MLS, BIL, DLN, BOI). 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	090° at 12 kt	−12 kt	5 °C	132 kt	6 h 23 min	1:11 am MDT (07:11 UTC)
6,500 ft	110° at 9 kt	−8 kt	7 °C	128 kt	6 h 35 min	1:23 am MDT (07:23 UTC)
8,500 ft	170° at 8 kt	0	4 °C	120 kt	7 h 01 min	1:49 am MDT (07:49 UTC)
10,500 ft	200° at 17 kt	+9 kt	1 °C	111 kt	7 h 35 min	2:23 am MDT (08:23 UTC)
12,500 ft	210° at 26 kt	+18 kt	-1 °C	102 kt	8 h 15 min	3:03 am MDT (09:03 UTC)
14,500 ft	220° at 30 kt	+23 kt	-5 °C	97 kt	8 h 41 min	3:29 am MDT (09:29 UTC)
16,500 ft	220° at 34 kt	+28 kt	-9 °C	92 kt	9 h 09 min	3:57 am MDT (09:57 UTC)
18,000 ft FL180	220° at 38 kt	+32 kt	-12 °C	88 kt	9 h 34 min	4:22 am MDT (10:22 UTC)
24,000 ft FL240	220° at 51 kt	+44 kt	-21 °C	76 kt	11 h 05 min	5:53 am MDT (11:53 UTC)
30,000 ft FL300	210° at 55 kt	+43 kt	-36 °C	77 kt	10 h 56 min	5:44 am MDT (11:44 UTC)
34,000 ft FL340	230° at 67 kt	+59 kt	-43 °C	61 kt	13 h 48 min	8:36 am MDT (14:36 UTC)
39,000 ft FL390	240° at 73 kt	+72 kt	-48 °C	48 kt	17 h 32 min	12:20 pm MDT (18:20 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
GFK	used from 0 nm out; 65 nm from the line	050/18	L/V 10°	240/20 7°	240/36 1°	250/47 -11°	260/53 -21°	270/59 -36°	270/65 -47°	260/88 -56°
ABR	used from 50 nm out; 79 nm from the line	030/24	220/5 16°	230/18 12°	230/32 5°	240/38 -10°	250/37 -20°	240/40 -35°	240/56 -44°	250/72 -52°
DIK	used from 149 nm out; 77 nm from the line		110/15 6°	200/17 5°	230/31 1°	240/47 -10°	240/52 -20°	230/52 -36°	240/57 -45°	250/67 -51°
MLS	used from 297 nm out; 62 nm from the line		120/22 5°	170/18 4°	200/33 1°	230/49 -10°	230/58 -21°	220/54 -37°	230/64 -44°	250/74 -49°
BIL	used from 446 nm out; 33 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 595 nm out; 60 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°
BOI	used from 743 nm out; 74 nm from the line		330/14 4°	230/5 -2°	220/20 -7°	210/37 -20°	200/59 -26°	200/67 -34°	210/73 -35°	220/62 -41°

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
FAR Fargo, ND	departure	IFR Sky: overcast at 600 feet	from the north (010°) at 15 knots	10+ mi	600 ft	901 ft	6:53 pm CDT (23:53 UTC)
BAC Valley City, ND	50 nm out, 7 nm north of the line	marginal VFR Sky: overcast at 1,300 feet	from the north-northeast (020°) at 13 knots, gusting to 19	10+ mi	1,300 ft	1,401 ft	21:55 UTC
BIS Bismarck, ND	159 nm out, 14 nm north of the line, tower	marginal VFR Sky: overcast at 1,400 feet	from the north-northeast (020°) at 14 knots, gusting to 25	10+ mi	1,400 ft	1,661 ft	23:52 UTC
HEI Hettinger, ND	248 nm out, 16 nm south of the line	low IFR Sky: overcast at 400 feet Weather: mist	from the northeast (050°) at 11 knots	3 mi	400 ft	2,705 ft	00:32 UTC
BWW Bowman, ND	268 nm out, 5 nm southwest of the line	low IFR Sky: overcast at 400 feet Weather: mist	from the east-northeast (060°) at 15 knots, gusting to 20	3 mi	400 ft	2,965 ft	23:35 UTC
RED Red Lodge, MT	525 nm out, 3 nm southwest of the line	no report just now				5,762 ft
WYS West Yellowstone, MT	614 nm out, 7 nm southeast of the line	IFR Sky: scattered clouds at 400 feet, overcast at 900 feet Weather: light rain, mist	from the north-northeast (020°) at 4 knots	5 mi	900 ft	6,649 ft	00:35 UTC
LLJ Challis, ID	743 nm out, 25 nm north of the line	marginal VFR Sky: a broken layer at 2,800 feet, overcast at 3,500 feet Weather: light rain	from the north-northwest (340°) at 10 knots	10+ mi	2,800 ft	5,075 ft	00:09 UTC
BOI Boise, ID	destination	VFR Sky: overcast at 4,200 feet Weather: light rain	calm	10+ mi	4,200 ft	2,871 ft	5:53 pm MDT (23:53 UTC)

The highest airport on this list sits at 6,649 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At BOI when you get there the forecast at the estimated arrival, 1:11 am MDT (07:11 UTC)

Wind from the west-northwest at 5 knots, visibility more than 6 miles, a few clouds at 5,000 feet, a broken layer at 8,000 feet VFR

The whole forecast for BOI

From Sun 6:00 pm MDT (00:00 UTC): wind from the northwest at 11 knots, visibility more than 6 miles, showers nearby, scattered clouds at 5,000 feet, overcast at 7,000 feet
At times between Sun 6:00 pm MDT (00:00 UTC) and 10:00 pm MDT (04:00 UTC): light rain showers, overcast at 5,000 feet
From Mon 12:00 am MDT (06:00 UTC): wind from the west-northwest at 5 knots, visibility more than 6 miles, a few clouds at 5,000 feet, a broken layer at 8,000 feet
From Mon 12:00 pm MDT (18:00 UTC): wind from the northwest at 10 knots, visibility more than 6 miles, a broken layer at 10,000 feet

The forecast for FAR, the departure

From Sun 7:00 pm CDT (00:00 UTC): wind from the north at 14 knots, visibility more than 6 miles, overcast at 600 feet
From Mon 11:00 am CDT (16:00 UTC): wind from the north-northeast at 10 knots, visibility more than 6 miles, overcast at 1,000 feet
30% chance between Mon 11:00 am CDT (16:00 UTC) and 5:00 pm CDT (22:00 UTC): light rain showers

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 FAR 6:45 pm CDT (23:45 UTC), at BOI 7:06 pm MDT (01:06 UTC) (civil twilight ends 7:35 pm MDT (01:35 UTC)). At 120 knots the arrival at BOI is before sunrise there (7:55 am MDT (13:55 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 northern 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: Hector International, Boise Air Trml/Gowen Field.