Plan a flight · Mon 8:02 am MDT (14:02 UTC)

Bozeman Yellowstone International to General Mitchell International BZN → MKE

1,009 nautical miles (1,161 statute miles) east on a straight line, true course 091°, about 078° magnetic at the departure end (variation 13E). At 120 knots that is 5 h 54 min at the quickest height in today's winds (39,000 ft, a 51-knot tailwind), arriving about 2:56 pm CDT (19:56 UTC). Right now BZN is IFR, wind from the southwest (220°) at 4 knots; MKE is VFR, wind from the south-southwest (210°) at 9 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: 3 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 C20C: thunderstorms (a convective SIGMET) up to 37,000 ft, moving from the southwest at 40 knots, until 9:55 am MDT (15:55 UTC). Near the route, 439 nm along the route.
as issued
```
WSUS32 KKCI 121355
MKCC WST 121355
CONVECTIVE SIGMET 20C
VALID UNTIL 1555Z
SD ND
FROM 80W GFK-40WNW FAR-40W ABR-50ENE DPR-30S BIS-80W GFK
AREA TS MOV FROM 21040KT. TOPS TO FL370.
```
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 719 nm of the route.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the first 90 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 140 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 100 to 170 nm out.

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 BZN.

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

GLF4 descending, 0 nm northwest, 7:48 am MDT (13:48 UTC): a routine report with nothing remarked on. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 1348/FLDURD/TP GLF4/SK 047
```
Report
a routine report filed through BZN
Where
over BZN
Time
13:48 UTC
Height
during the descent
Aircraft
GLF4
Sky
at 4,700 ft
C340 descending, 0 nm northwest, 6:47 am MDT (12:47 UTC): light icing, remarks: smooth. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 1247/FLDURD/TP C340/SK 055/IC LGT RM/RM SMOOTH
```
Report
a routine report filed through BZN
Where
over BZN
Time
12:47 UTC
Height
during the descent
Aircraft
C340
Sky
at 5,500 ft
Icing
light remarks
Remarks
smooth
C25A at 5,000 ft, 7 nm northwest, 7:00 am MDT (13:00 UTC): light rime icing, 4 °C, remarks: lt rime in the descent. 110 nm along the route, 7 nm northwest of the line.
as filed, and in English
```
BIL UA /OV 100006/TM 1300/FL050/TP C25A/TA 4/IC LT RIME/RM LT RIME IN THE DESCENT
```
Report
a routine report filed through BIL
Where
wind from 100° at 6 knots
Time
13:00 UTC
Height
at 5,000 ft
Aircraft
C25A
Temperature
4 °C
Icing
lt rime
Remarks
lt rime in the descent
A321 at 35,000 ft, 27 nm north, 7:38 am MDT (13:38 UTC): no turbulence. 449 nm along the route, 27 nm north of the line.
as filed, and in English
```
MBG UA /OV MBG/TM 1338/FL350/TP A321/SK TOP310/TB NEG
```
Report
a routine report filed through MBG
Where
over MBG
Time
13:38 UTC
Height
at 35,000 ft
Aircraft
A321
Sky
TOP310
Turbulence
none
SF50 at 4,000 ft, 40 nm south, 7:47 am MDT (13:47 UTC): no turbulence, no icing. 469 nm along the route, 40 nm south of the line.
as filed, and in English
```
PIR UA /OV PIR/TM 1347/FL040/TP SF50/SK BASE008-TOP040/TB NEG/IC NEG
```
Report
a routine report filed through PIR
Where
over PIR
Time
13:47 UTC
Height
at 4,000 ft
Aircraft
SF50
Sky
BASE008-TOP040
Turbulence
none
Icing
none
C441 at 5,000 ft, 34 nm north, 5:52 am MDT (11:52 UTC): no turbulence, no icing, remarks: during the climb. 539 nm along the route, 34 nm north of the line.
as filed, and in English
```
ABR UA /OV ABR/TM 1152/FL050/TP C441/SK BASEUNKN-TOP032/TB NEG/IC NEG/RM DURC
```
Report
a routine report filed through ABR
Where
over ABR
Time
11:52 UTC
Height
at 5,000 ft
Aircraft
C441
Sky
BASEUNKN-TOP032
Turbulence
none
Icing
none
Remarks
during the climb
C25A at 7,500 ft, 18 nm north, 6:31 am MDT (12:31 UTC): no turbulence, no icing, remarks: during the climb. 589 nm along the route, 18 nm north of the line.
as filed, and in English
```
ATY UA /OV ATY/TM 1231/FL075/TP C25A/SK BASEUNKN/TB NEG/IC NEG/RM DURC
```
Report
a routine report filed through ATY
Where
over ATY
Time
12:31 UTC
Height
at 7,500 ft
Aircraft
C25A
Sky
baseunkn
Turbulence
none
Icing
none
Remarks
during the climb
SF50 at 13,000 ft, 6 nm northeast, 7:36 am MDT (13:36 UTC): no turbulence, no icing, clear from 13,000 ft to 60,000 ft. 679 nm along the route, 6 nm northeast of the line.
as filed, and in English
```
RWF UA /OV RWF/TM 1336/FL130/TP SF50/SK SKC/TB NEG/IC NEG
```
Report
a routine report filed through RWF
Where
over RWF
Time
13:36 UTC
Height
at 13,000 ft
Aircraft
SF50
Sky
clear
Turbulence
none
Icing
none
BE36 at 6,000 ft, 36 nm south, 7:12 am MDT (13:12 UTC): no turbulence. 719 nm along the route, 36 nm south of the line.
as filed, and in English
```
FRM UA /OV FRM/TM 1312/FL060/TP BE36/TB NEG
```
Report
a routine report filed through FRM
Where
over FRM
Time
13:12 UTC
Height
at 6,000 ft
Aircraft
BE36
Turbulence
none
PC12 at 20,000 ft, 14 nm south, 7:27 am MDT (13:27 UTC): no turbulence. 909 nm along the route, 14 nm south of the line.
as filed, and in English
```
LNR UA /OV 0WI4/TM 1327/FL200/TP PC12/TB NEG
```
Report
a routine report filed through LNR
Where
over 0WI4
Time
13:27 UTC
Height
at 20,000 ft
Aircraft
PC12
Turbulence
none
C510 at 17,000 ft, 14 nm south, 7:27 am MDT (13:27 UTC): no turbulence. 909 nm along the route, 14 nm south of the line.
as filed, and in English
```
LNR UA /OV LNR/TM 1327/FL170/TP C510/TB NEG
```
Report
a routine report filed through LNR
Where
over LNR
Time
13:27 UTC
Height
at 17,000 ft
Aircraft
C510
Turbulence
none
B39M at 36,000 ft, 44 nm south, 7:18 am MDT (13:18 UTC): no turbulence. At the destination end, 44 nm south of the line.
as filed, and in English
```
PWK UA /OV OBK/TM 1318/FL360/TP B39M/TB NEG
```
Report
a routine report filed through PWK
Where
over OBK
Time
13:18 UTC
Height
at 36,000 ft
Aircraft
B39M
Turbulence
none

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 11 forecast points nearest it (BIL, MLS, RAP, PIR, ABR, FSD, MSP, LSE, DBQ, GRB, MKG). 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	240° at 15 kt	−11 kt		131 kt	7 h 42 min	4:44 pm CDT (21:44 UTC)
5,500 ft	250° at 16 kt	−14 kt	10 °C	134 kt	7 h 32 min	4:34 pm CDT (21:34 UTC)
7,500 ft	250° at 19 kt	−16 kt	12 °C	136 kt	7 h 25 min	4:27 pm CDT (21:27 UTC)
9,500 ft	240° at 23 kt	−18 kt	7 °C	138 kt	7 h 19 min	4:21 pm CDT (21:21 UTC)
11,500 ft	240° at 25 kt	−20 kt	4 °C	140 kt	7 h 12 min	4:14 pm CDT (21:14 UTC)
13,500 ft	240° at 25 kt	−20 kt	0 °C	140 kt	7 h 12 min	4:14 pm CDT (21:14 UTC)
15,500 ft	240° at 25 kt	−19 kt	-5 °C	139 kt	7 h 16 min	4:18 pm CDT (21:18 UTC)
17,500 ft	230° at 25 kt	−18 kt	-9 °C	138 kt	7 h 19 min	4:21 pm CDT (21:21 UTC)
18,000 ft FL180	230° at 25 kt	−18 kt	-10 °C	138 kt	7 h 19 min	4:21 pm CDT (21:21 UTC)
24,000 ft FL240	230° at 34 kt	−24 kt	-22 °C	144 kt	7 h	4:02 pm CDT (21:02 UTC)
30,000 ft FL300	240° at 41 kt	−33 kt	-35 °C	153 kt	6 h 36 min	3:38 pm CDT (20:38 UTC)
34,000 ft FL340	250° at 47 kt	−40 kt	-39 °C	160 kt	6 h 18 min	3:20 pm CDT (20:20 UTC)
39,000 ft FL390	250° at 56 kt	−51 kt	-47 °C	171 kt	5 h 54 min	2:56 pm CDT (19:56 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
BIL	used from 0 nm out; 84 nm from the line		300/14	270/19 -2°	260/26 -2°	220/28 -13°	210/51 -25°	220/56 -33°	220/61 -39°	220/72 -45°
MLS	used from 200 nm out; 52 nm from the line		290/17 -1°	250/18 0°	230/25 0°	220/31 -11°	220/32 -24°	220/50 -32°	220/60 -38°	230/71 -46°
RAP	used from 300 nm out; 82 nm from the line		250/28 16°	260/31 10°	240/25 4°	210/35 -10°	200/45 -23°	230/47 -31°	230/47 -36°	230/51 -46°
PIR	used from 400 nm out; 58 nm from the line		230/15 15°	220/22 14°	220/24 6°	200/32 -10°	210/48 -22°	240/45 -33°	240/43 -37°	250/55 -46°
ABR	used from 499 nm out; 36 nm from the line	080/12	210/12 17°	220/22 12°	230/26 5°	220/28 -10°	230/41 -21°	250/36 -36°	260/47 -39°	260/63 -47°
FSD	used from 599 nm out; 61 nm from the line	210/20	230/23 21°	220/25 14°	230/30 5°	230/26 -9°	240/30 -21°	270/33 -36°	260/47 -37°	270/58 -47°
MSP	used from 699 nm out; 58 nm from the line	250/12	250/17 17°	240/26 12°	250/26 5°	280/26 -9°	280/32 -22°	270/37 -38°	280/47 -41°	280/55 -48°
LSE	used from 799 nm out; 31 nm from the line	250/25	240/21 17°	240/28 11°	250/28 5°	280/24 -10°	280/31 -21°	260/35 -37°	270/45 -43°	280/59 -47°
DBQ	used from 899 nm out; 71 nm from the line	250/27	260/23 17°	240/26 10°	260/30 4°	280/26 -9°	280/36 -21°	270/41 -36°	280/52 -41°	290/67 -48°
GRB	used from 949 nm out; 85 nm from the line	250/32	250/22 17°	240/18 8°	280/21 6°	280/34 -11°	280/35 -21°	280/39 -37°	270/52 -45°	290/60 -49°
MKG	used from 999 nm out; 79 nm from the line	260/28	260/18 15°	250/16 9°	260/22 4°	280/31 -9°	270/35 -21°	270/44 -35°	270/42 -45°	290/61 -51°

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
BZN Bozeman, MT	departure	IFR Sky: scattered clouds at 400 feet, overcast at 900 feet Weather: mist	from the southwest (220°) at 4 knots	1.5 mi	900 ft	4,473 ft	7:56 am MDT (13:56 UTC)
LVM Livingston, MT	30 nm out, 4 nm south of the line	marginal VFR Sky: overcast at 2,000 feet	from the southwest (230°) at 6 knots	10+ mi	2,000 ft	4,659 ft	13:53 UTC
BIL Billings, MT	110 nm out, 6 nm north of the line, tower	VFR Sky: scattered clouds at 2,100 feet, overcast at 3,700 feet	from the southwest (220°) at 4 knots	10+ mi	3,700 ft	3,662 ft	13:53 UTC
ATY Watertown, SD	589 nm out, 14 nm north of the line	low IFR Sky: sky obscured at 300 feet Weather: fog	from the east-northeast (070°) at 8 knots	0.25 mi	300 ft	1,749 ft	13:53 UTC
MML Marshall, MN	649 nm out, 4 nm southeast of the line	low IFR Sky: overcast at 300 feet Weather: fog	from the northeast (040°) at 5 knots	0.25 mi	300 ft	1,182 ft	13:56 UTC
RST Rochester, MN	799 nm out, 1 nm southeast of the line, tower	VFR	from the south (190°) at 11 knots	7 mi	none	1,317 ft	13:54 UTC
LSE La Crosse, WI	849 nm out, 12 nm northeast of the line, tower	VFR	from the south-southwest (200°) at 10 knots	10+ mi	none	655 ft	13:53 UTC
UES Waukesha, WI	989 nm out, 4 nm east of the line, tower	VFR	from the south-southwest (200°) at 8 knots	10+ mi	none	911 ft	13:45 UTC
MKE Milwaukee, WI	destination	VFR Sky: a few clouds at 18,000 feet, a broken layer at 25,000 feet	from the south-southwest (210°) at 9 knots	10+ mi	25,000 ft	728 ft	8:52 am CDT (13:52 UTC)

The highest airport on this list sits at 4,659 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At MKE when you get there the forecast at the estimated arrival, 2:56 pm CDT (19:56 UTC)

Wind from the southwest at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 25,000 feet VFR

The whole forecast for MKE

From Mon 7:00 am CDT (12:00 UTC): wind from the southwest at 12 knots, visibility more than 6 miles, a broken layer at 25,000 feet
From Mon 10:00 am CDT (15:00 UTC): wind from the southwest at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 25,000 feet
From Mon 9:00 pm CDT (02:00 UTC): wind from the southwest at 7 knots, visibility more than 6 miles, low-level wind shear, scattered clouds at 10,000 feet
From Tue 3:00 am CDT (08:00 UTC): wind from the west at 10 knots, visibility more than 6 miles, a few clouds at 25,000 feet

The forecast for BZN, the departure

From Mon 6:00 am MDT (12:00 UTC): wind light and variable, visibility 6 miles, mist, scattered clouds at 400 feet, overcast at 1,500 feet
At times between Mon 6:00 am MDT (12:00 UTC) and 9:00 am MDT (15:00 UTC): visibility 3 miles, mist, overcast at 400 feet
From Mon 10:00 am MDT (16:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 600 feet, overcast at 1,500 feet
From Mon 7:00 pm MDT (01:00 UTC): wind light and variable, visibility 6 miles, mist, overcast at 300 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 BZN 6:42 pm MDT (00:42 UTC), at MKE 6:14 pm CDT (23:14 UTC) (civil twilight ends 6:42 pm CDT (23:42 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 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: Bozeman Yellowstone International, General Mitchell International.