Plan a flight · Mon 9:21 am MDT (15:21 UTC)

Boise Air Trml/Gowen Field to MC Ghee Tyson Airport BOI → TYS

1,549 nautical miles (1,783 statute miles) east on a straight line, true course 096°, about 083° magnetic at the departure end (variation 13E). At 120 knots that is 9 h at the quickest height in today's winds (34,000 ft, a 52-knot tailwind), arriving about 8:21 pm EDT (00:21 UTC), after sunset at the destination. Right now BOI is VFR, wind from the northwest (320°) at 8 knots; TYS is VFR, wind from the south-southwest (210°) 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: 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

AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 40 to 420 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 60 to 390 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 route from 70 to 710 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Near the route, 230 nm along the route.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 450 to 480 nm out.
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 460 to 550 nm out.
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 470 to 600 nm out.
AIRMET TANGO 2W: 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 770 to 1139 nm out.
AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Near the route, at the destination end.

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 BOI.

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

BE20 at 12,500 ft, 48 nm south, 8:28 am MDT (14:28 UTC): moderate turbulence from 9,000 ft to 12,000 ft, remarks: during the climb zdvwc. 520 nm along the route, 48 nm south of the line.
as filed, and in English
```
CYS UA /OV CYS/TM 1428/FL125/TP BE20/TB MOD 090-120/RM DURC -ZDVWC
```
Report
a routine report filed through CYS
Where
over CYS
Time
14:28 UTC
Height
at 12,500 ft
Aircraft
BE20
Turbulence
moderate from 9,000 ft to 12,000 ft
Remarks
during the climb zdvwc
E75 at 7,000 ft, 8 nm northeast, 9:17 am MDT (15:17 UTC): a routine report with nothing remarked on. 80 nm along the route, 8 nm northeast of the line.
as filed, and in English
```
SUN UA /OV SUN/TM 1517/FL070/TP E75/SK BASE 057/ZLC
```
Report
a routine report filed through SUN
Where
over SUN
Time
15:17 UTC
Height
at 7,000 ft
Aircraft
E75
Sky
base 5,700 ft; zlc
MU2 at 12,000 ft, 8 nm northeast, 8:07 am MDT (14:07 UTC): a routine report with nothing remarked on. 80 nm along the route, 8 nm northeast of the line.
as filed, and in English
```
SUN UA /OV SUN/TM 1407/FL120/TP MU2/SK BASE 055 TOP 118 /ZLC
```
Report
a routine report filed through SUN
Where
over SUN
Time
14:07 UTC
Height
at 12,000 ft
Aircraft
MU2
Sky
base 5,500 ft top 11,800 ft; zlc
BCS1 at 25,000 ft, 20 nm south, 6:22 am MDT (12:22 UTC): a routine report with nothing remarked on. 160 nm along the route, 20 nm south of the line.
as filed, and in English
```
PIH UA /OV PIH/TM 1222/FL250/TP BCS1/SK TOP 265/ZLC
```
Report
a routine report filed through PIH
Where
over PIH
Time
12:22 UTC
Height
at 25,000 ft
Aircraft
BCS1
Sky
top 26,500 ft; zlc
E175L at 10,000 ft, 31 nm north, 8:05 am MDT (14:05 UTC): overcast from 10,500 ft to 11,500 ft. 440 nm along the route, 31 nm north of the line.
as filed, and in English
```
CPR UA /OV CPR110010/TM 1405/FL100/TP E175L/SK OVC105-TOP115
```
Report
a routine report filed through CPR
Where
10 nm east (110°) of CPR
Time
14:05 UTC
Height
at 10,000 ft
Aircraft
E175L
Sky
overcast from 10,500 ft, tops 11,500 ft
BE20 at 8,000 ft, 24 nm north, 7:15 am MDT (13:15 UTC): no turbulence, no icing, remarks: durd-zdvwc 31. 600 nm along the route, 24 nm north of the line.
as filed, and in English
```
AIA UA /OV KAIA/TM 1315/FL080/TP BE20/SK TOP 045 BASE 002/TB NEG/IC NEG/RM DURD-ZDVWC- 31
```
Report
a routine report filed through AIA
Where
over KAIA
Time
13:15 UTC
Height
at 8,000 ft
Aircraft
BE20
Sky
top 4,500 ft base 200 ft
Turbulence
none
Icing
none
Remarks
durd-zdvwc 31
B738 at 38,000 ft, 9 nm south, 7:09 am MDT (13:09 UTC): light chop turbulence, remarks: ZDVWC-35. 700 nm along the route, 9 nm south of the line.
as filed, and in English
```
LBF UA /OV LBF/TM 1309/FL380/TP B738/TB CONS LGT CHOP/RM -ZDVWC-35
```
Report
a routine report filed through LBF
Where
over LBF
Time
13:09 UTC
Height
at 38,000 ft
Aircraft
B738
Turbulence
continuous light chop
Remarks
ZDVWC-35
B38M at 39,000 ft, 8 nm south, 6:43 am MDT (12:43 UTC): light chop turbulence. 780 nm along the route, 8 nm south of the line.
as filed, and in English
```
HSI UA /OV HSI270030/TM 1243/FL390/TP B38M/TB CONS LGT CHOP
```
Report
a routine report filed through HSI
Where
30 nm west (270°) of HSI
Time
12:43 UTC
Height
at 39,000 ft
Aircraft
B38M
Turbulence
continuous light chop
B38M at 17,000 ft, 42 nm north, 6:41 am MDT (12:41 UTC): no turbulence, remarks: during the climb. 879 nm along the route, 42 nm north of the line.
as filed, and in English
```
LNK UA /OV LNK/TM 1241/FL170/TP B38M/TB NEG/RM DURC
```
Report
a routine report filed through LNK
Where
over LNK
Time
12:41 UTC
Height
at 17,000 ft
Aircraft
B38M
Turbulence
none
Remarks
during the climb
B38M at 18,000 ft, 38 nm north, 7:04 am MDT (13:04 UTC): light chop turbulence. 969 nm along the route, 38 nm north of the line.
as filed, and in English
```
EVU UA /OV EVU/TM 1304/FL180/TP B38M/TB CONS LGT CHOP
```
Report
a routine report filed through EVU
Where
over EVU
Time
13:04 UTC
Height
at 18,000 ft
Aircraft
B38M
Turbulence
continuous light chop
B737 descending, 17 nm southwest, 8:55 am MDT (14:55 UTC): light turbulence up to 1,500 ft. 999 nm along the route, 17 nm southwest of the line.
as filed, and in English
```
MCI UA /OV MCI010002/TM 1455/FLDURD/TP B737/TB LGT TURB 015-SFC
```
Report
a routine report filed through MCI
Where
2 nm north (010°) of MCI
Time
14:55 UTC
Height
during the descent
Aircraft
B737
Turbulence
light turbulence from 1,500 ft to the surface
A320 at 28,000 ft, 36 nm northeast, 6:48 am MDT (12:48 UTC): no turbulence, no icing, clear from 28,000 ft to 60,000 ft. 1359 nm along the route, 36 nm northeast of the line.
as filed, and in English
```
EVV UA /OV OWB/TM 1248/FL280/TP A320/SK SKC/TB NEG/IC NEG
```
Report
a routine report filed through EVV
Where
over OWB
Time
12:48 UTC
Height
at 28,000 ft
Aircraft
A320
Sky
clear
Turbulence
none
Icing
none
B738 at 35,000 ft, 16 nm north, 8:09 am MDT (14:09 UTC): no turbulence. 1479 nm along the route, 16 nm north of the line.
as filed, and in English
```
LOZ UA /OV LVT/TM 1409/FL350/TP B738/TB NEG
```
Report
a routine report filed through LOZ
Where
over LVT
Time
14:09 UTC
Height
at 35,000 ft
Aircraft
B738
Turbulence
none
CRJ9 at 20,000 ft, 7 nm southwest, 6:55 am MDT (12:55 UTC): no turbulence, remarks: ztlfd 41. At the destination end, 7 nm southwest of the line.
as filed, and in English
```
ATL UA /OV VXV260020/TM 1255/FL200/TP CRJ9/TB NEG/RM ZTLFD 41
```
Report
a routine report filed through ATL
Where
20 nm west (260°) of VXV
Time
12:55 UTC
Height
at 20,000 ft
Aircraft
CRJ9
Turbulence
none
Remarks
ztlfd 41

Winds aloft along the route, and the time en route the forecast for use 14:00–21:00 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 13 forecast points nearest it (BOI, PIH, LND, BFF, GRI, OMA, MKC, COU, STL, CGI, EVV, BNA, TYS). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
5,500 ft	270° at 15 kt	−13 kt	13 °C	133 kt	11 h 39 min	11:00 pm EDT (03:00 UTC)
7,500 ft	250° at 16 kt	−13 kt	11 °C	133 kt	11 h 39 min	11:00 pm EDT (03:00 UTC)
9,500 ft	250° at 20 kt	−15 kt	7 °C	135 kt	11 h 28 min	10:49 pm EDT (02:49 UTC)
11,500 ft	240° at 23 kt	−17 kt	3 °C	137 kt	11 h 18 min	10:39 pm EDT (02:39 UTC)
13,500 ft	240° at 26 kt	−18 kt	-1 °C	138 kt	11 h 13 min	10:34 pm EDT (02:34 UTC)
15,500 ft	240° at 28 kt	−19 kt	-5 °C	139 kt	11 h 09 min	10:30 pm EDT (02:30 UTC)
17,500 ft	230° at 30 kt	−20 kt	-10 °C	140 kt	11 h 04 min	10:25 pm EDT (02:25 UTC)
18,000 ft FL180	230° at 31 kt	−20 kt	-11 °C	140 kt	11 h 04 min	10:25 pm EDT (02:25 UTC)
24,000 ft FL240	240° at 42 kt	−28 kt	-22 °C	148 kt	10 h 28 min	9:49 pm EDT (01:49 UTC)
30,000 ft FL300	250° at 53 kt	−47 kt	-31 °C	167 kt	9 h 17 min	8:38 pm EDT (00:38 UTC)
34,000 ft FL340	260° at 57 kt	−52 kt	-37 °C	172 kt	9 h	8:21 pm EDT (00:21 UTC)
39,000 ft FL390	260° at 49 kt	−45 kt	-46 °C	165 kt	9 h 23 min	8:44 pm EDT (00:44 UTC)

Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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
BOI	used from 0 nm out; 25 nm from the line		360/9 1°	L/V -5°	180/10 -12°	200/58 -21°	180/62 -31°	200/41 -31°	210/34 -32°	200/29 -41°
PIH	used from 100 nm out; 41 nm from the line		L/V	180/8 -1°	190/21 -6°	210/56 -18°	190/64 -28°	210/68 -31°	210/60 -36°	210/54 -42°
LND	used from 250 nm out; 57 nm from the line			220/16 3°	230/26 -1°	210/30 -14°	220/57 -26°	220/60 -31°	220/62 -38°	220/52 -44°
BFF	used from 450 nm out; 91 nm from the line		310/15	280/27 8°	250/27 2°	230/30 -12°	240/52 -22°	250/66 -32°	240/78 -37°	240/76 -43°
GRI	used from 700 nm out; 87 nm from the line		270/26 19°	230/33 13°	230/39 8°	230/43 -9°	240/55 -21°	250/76 -28°	260/84 -36°	260/68 -47°
OMA	used from 899 nm out; 78 nm from the line	210/23	240/34 20°	230/40 14°	220/43 7°	240/38 -8°	250/47 -21°	270/70 -29°	270/79 -36°	270/68 -48°
MKC	used from 949 nm out; 42 nm from the line	220/35	240/30 21°	240/27 13°	240/31 6°	260/31 -7°	250/43 -21°	270/70 -28°	280/72 -36°	280/59 -49°
COU	used from 1049 nm out; 43 nm from the line	240/28	240/22 17°	250/18 12°	260/22 6°	270/23 -7°	260/39 -19°	290/70 -30°	290/71 -37°	290/58 -48°
STL	used from 1149 nm out; 37 nm from the line	240/25	240/21 15°	260/21 12°	270/21 7°	280/25 -7°	280/39 -19°	290/65 -31°	290/70 -38°	290/59 -48°
CGI	used from 1249 nm out; 41 nm from the line	250/22	250/17 15°	250/25 11°	260/27 7°	270/35 -7°	280/38 -17°	300/63 -31°	300/62 -38°	300/55 -49°
EVV	used from 1299 nm out; 47 nm from the line	270/15	250/15 14°	260/24 11°	270/28 6°	280/30 -7°	280/34 -18°	290/48 -33°	290/59 -38°	300/56 -48°
BNA	used from 1399 nm out; 42 nm from the line	270/14	270/10 14°	280/19 11°	280/26 6°	280/25 -6°	280/31 -18°	300/44 -32°	300/53 -40°	310/51 -49°
TYS	used from 1499 nm out; 25 nm from the line	320/8	330/17 16°	320/17 9°	310/24 6°	290/23 -6°	290/28 -19°	300/36 -33°	310/48 -40°	320/46 -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
BOI Boise, ID	departure	VFR Sky: a broken layer at 9,500 feet	from the northwest (320°) at 8 knots	10+ mi	9,500 ft	2,871 ft	8:53 am MDT (14:53 UTC)
SUN Hailey, ID	80 nm out, 8 nm northeast of the line, tower	IFR Sky: overcast at 700 feet	from the southeast (130°) at 8 knots	7 mi	700 ft	5,319 ft	14:50 UTC
PIH Pocatello, ID	160 nm out, 18 nm south of the line, tower	marginal VFR Sky: a broken layer at 1,700 feet, overcast at 7,500 feet	from the east (100°) at 4 knots	10+ mi	1,700 ft	4,451 ft	14:53 UTC
LND Lander, WY	330 nm out, 7 nm north of the line	IFR Sky: overcast at 500 feet Weather: mist	calm	6 mi	500 ft	5,588 ft	14:53 UTC
GUR Guernsey, WY	510 nm out, 14 nm north of the line, tower	VFR	from the east-southeast (110°) at 4 knots	10+ mi	none	4,401 ft	14:55 UTC
LBF North Platte, NE	700 nm out, 5 nm southeast of the line	low IFR Sky: overcast at 300 feet	from the north-northwest (330°) at 6 knots	10+ mi	300 ft	2,777 ft	14:53 UTC
GRI Grand Island, NE	809 nm out, 21 nm north of the line, tower	VFR	from the southwest (220°) at 13 knots	10+ mi	none	1,847 ft	14:53 UTC
STJ St Joseph, MO	979 nm out, 5 nm northeast of the line, tower	VFR	from the south-southwest (200°) at 16 knots, gusting to 24	10+ mi	none	826 ft	14:53 UTC
COU Columbia, MO	1119 nm out, 3 nm west of the line, tower	VFR	from the southwest (220°) at 15 knots, gusting to 21	10+ mi	none	889 ft	14:54 UTC
MWA Marion, IL	1279 nm out, 2 nm southeast of the line, tower	VFR Sky: a few clouds at 10,000 feet	from the south-southwest (210°) at 6 knots	10+ mi	none	471 ft	14:45 UTC
RKW Rockwood, TN	1519 nm out, 10 nm southwest of the line	low IFR Sky: overcast at 300 feet Weather: fog	from the southeast (130°) at 3 knots	0.25 mi	300 ft	1,664 ft	14:55 UTC
TYS Knoxville, TN	destination	VFR Sky: a few clouds at 400 feet, a few clouds at 2,300 feet, a few clouds at 18,000 feet	from the south-southwest (210°) at 4 knots	10+ mi	none	986 ft	10:53 am EDT (14:53 UTC)

The highest airport on this list sits at 5,588 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At TYS when you get there the forecast at the estimated arrival, 8:21 pm EDT (00:21 UTC)

Wind from the west-southwest at 5 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for TYS

From Mon 8:00 am EDT (12:00 UTC): wind from the southwest at 4 knots, visibility ¼ mile, fog, overcast at 100 feet
From Mon 9:00 am EDT (13:00 UTC): wind from the southwest at 6 knots, visibility 1 mile, mist, overcast at 200 feet
From Mon 9:30 am EDT (13:30 UTC): wind from the southwest at 6 knots, visibility more than 6 miles, scattered clouds at 500 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the west-southwest at 5 knots, visibility more than 6 miles, clear skies
From Tue 5:00 am EDT (09:00 UTC): wind calm, visibility 3 miles, mist, scattered clouds at 200 feet

The forecast for BOI, the departure

From Mon 6:00 am MDT (12:00 UTC): wind from the west-northwest at 5 knots, visibility more than 6 miles, scattered clouds at 4,000 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

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

6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 17 nm from the route, 1109 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC

Daylight

Sunset at BOI 7:05 pm MDT (01:05 UTC), at TYS 7:04 pm EDT (23:04 UTC) (civil twilight ends 7:30 pm EDT (23:30 UTC)). At 120 knots the arrival at TYS is after sunset there (7:04 pm EDT (23:04 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 Pacific Northwest · loop National Weather Service

Radar now, the northern Rockies · loop National Weather Service

Radar now, the upper Mississippi valley · 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: Boise Air Trml/Gowen Field, MC Ghee Tyson Airport.