Plan a flight · Mon 2:39 am MDT (08:39 UTC)

Aspen-Pitkin County/Sardy Field to Dane County Rgnl/Truax Field ASE → MSN

825 nautical miles (949 statute miles) east on a straight line, true course 068°, about 059° magnetic at the departure end (variation 9E). At 120 knots that is 4 h 29 min at the quickest height in today's winds (39,000 ft, a 64-knot tailwind), arriving about 8:08 am CDT (13:08 UTC). Right now ASE is VFR, wind from the south-southeast (160°) at 4 knots; MSN is VFR, wind from the south-southwest (200°) at 5 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: 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

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 first 109 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, at the departure end.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 42,000 ft. Over the first 169 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 179 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 10 nm of the route.
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 last 566 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 ASE.

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

B737 at 18,000 ft, 45 nm northwest, 1:24 am MDT (07:24 UTC): moderate turbulence, remarks: FL180-130. 109 nm along the route, 45 nm northwest of the line.
as filed, and in English
```
DEN UA /OV DEN330050/TM 0724/FL180/TP B737/TB MOD/RM FL180-130
```
Report
a routine report filed through DEN
Where
50 nm northwest (330°) of DEN
Time
07:24 UTC
Height
at 18,000 ft
Aircraft
B737
Turbulence
moderate
Remarks
FL180-130
CRJ2 at 22,000 ft, 26 nm southeast, 12:35 am MDT (06:35 UTC): no turbulence up to 26,000 ft, no icing, clear from 22,000 ft to 60,000 ft, remarks: during the descent ZDVWC-26. 50 nm along the route, 26 nm southeast of the line.
as filed, and in English
```
DEN UA /OV DEN220060/TM 0635/FL220/TP CRJ2/SK SKC/TB NEG BLO 260/IC NEG/RM DURD/ ZDVWC-26
```
Report
a routine report filed through DEN
Where
60 nm southwest (220°) of DEN
Time
06:35 UTC
Height
at 22,000 ft
Aircraft
CRJ2
Sky
clear
Turbulence
no below 26,000 ft
Icing
none
Remarks
during the descent ZDVWC-26
B738 at 23,000 ft, 16 nm south, 12:23 am MDT (06:23 UTC): no turbulence from 23,000 ft to 26,000 ft, clear from 23,000 ft to 60,000 ft, remarks: during the descent sskii star ZDVWC-06. 50 nm along the route, 16 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN230060/TM 0623/FL230/TP B738/SK SKC/TB NEG 230-260/RM DURD SSKII STAR. ZDVWC-06
```
Report
a routine report filed through DEN
Where
60 nm southwest (230°) of DEN
Time
06:23 UTC
Height
at 23,000 ft
Aircraft
B738
Sky
clear
Turbulence
no from 23,000 ft to 26,000 ft
Remarks
during the descent sskii star ZDVWC-06
B38M at 22,000 ft, 30 nm south, 2:14 am MDT (08:14 UTC): no turbulence, remarks: zdvwc. 60 nm along the route, 30 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN216059/TM 0814/FL220/TP B38M/TB NEG/RM ZDVWC
```
Report
a routine report filed through DEN
Where
59 nm southwest (216°) of DEN
Time
08:14 UTC
Height
at 22,000 ft
Aircraft
B38M
Turbulence
none
Remarks
zdvwc
A20N at 25,000 ft, 5 nm northeast, 12:19 am MDT (06:19 UTC): light chop turbulence up to 26,000 ft, remarks: during the climb ZDVWC-06. 60 nm along the route, 5 nm northeast of the line.
as filed, and in English
```
DEN UA /OV DEN250045/TM 0619/FL250/TP A20N/TB OCNL LGT CHOP BLO 260/RM DURC. ZDVWC-06
```
Report
a routine report filed through DEN
Where
45 nm west (250°) of DEN
Time
06:19 UTC
Height
at 25,000 ft
Aircraft
A20N
Turbulence
occasional light chop below 26,000 ft
Remarks
during the climb ZDVWC-06
B737 descending, 5 nm south, 2:10 am MDT (08:10 UTC): light chop turbulence. 109 nm along the route, 5 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0810/FLDURD/TP B737/TB LGT CHOP
```
Report
a routine report filed through DEN
Where
over DEN
Time
08:10 UTC
Height
during the descent
Aircraft
B737
Turbulence
light chop
B737 descending, 5 nm south, 1:10 am MDT (07:10 UTC): remarks: smooth. 109 nm along the route, 5 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0710/FLDURD/TP B737/RM SMOOTH
```
Report
a routine report filed through DEN
Where
over DEN
Time
07:10 UTC
Height
during the descent
Aircraft
B737
Remarks
smooth
B738 descending, 5 nm south, 12:15 am MDT (06:15 UTC): light chop turbulence. 109 nm along the route, 5 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0615/FLDURD/TP B738/TB LGT CHOP
```
Report
a routine report filed through DEN
Where
over DEN
Time
06:15 UTC
Height
during the descent
Aircraft
B738
Turbulence
light chop

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 6 forecast points nearest it (DEN, GLD, GRI, OMA, MCW, DBQ). 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	240° at 32 kt	−31 kt	23 °C	151 kt	5 h 28 min	9:07 am CDT (14:07 UTC)
7,500 ft	250° at 27 kt	−26 kt	15 °C	146 kt	5 h 39 min	9:18 am CDT (14:18 UTC)
9,500 ft	240° at 24 kt	−24 kt	11 °C	144 kt	5 h 44 min	9:23 am CDT (14:23 UTC)
11,500 ft	240° at 24 kt	−23 kt	7 °C	143 kt	5 h 46 min	9:25 am CDT (14:25 UTC)
13,500 ft	240° at 26 kt	−25 kt	2 °C	145 kt	5 h 41 min	9:20 am CDT (14:20 UTC)
15,500 ft	240° at 29 kt	−28 kt	-3 °C	148 kt	5 h 34 min	9:13 am CDT (14:13 UTC)
17,500 ft	240° at 32 kt	−32 kt	-7 °C	152 kt	5 h 26 min	9:05 am CDT (14:05 UTC)
18,000 ft FL180	240° at 33 kt	−33 kt	-8 °C	153 kt	5 h 24 min	9:03 am CDT (14:03 UTC)
24,000 ft FL240	240° at 40 kt	−40 kt	-21 °C	160 kt	5 h 09 min	8:48 am CDT (13:48 UTC)
30,000 ft FL300	250° at 50 kt	−51 kt	-32 °C	171 kt	4 h 49 min	8:28 am CDT (13:28 UTC)
34,000 ft FL340	260° at 63 kt	−63 kt	-37 °C	183 kt	4 h 30 min	8:09 am CDT (13:09 UTC)
39,000 ft FL390	260° at 64 kt	−64 kt	-47 °C	184 kt	4 h 29 min	8:08 am CDT (13:08 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
DEN	used from 0 nm out; 84 nm from the line			270/24 11°	230/13 5°	230/48 -8°	230/46 -20°	230/63 -30°	240/78 -36°	240/78 -48°
GLD	used from 199 nm out; 76 nm from the line		260/37	260/25 14°	250/27 8°	230/36 -8°	230/49 -21°	250/71 -30°	260/82 -36°	250/73 -48°
GRI	used from 298 nm out; 88 nm from the line		230/39 23°	230/32 15°	210/29 7°	230/31 -8°	230/43 -21°	250/52 -31°	260/59 -35°	260/59 -46°
OMA	used from 447 nm out; 61 nm from the line	230/47	240/33 21°	230/22 13°	220/27 5°	240/35 -8°	250/43 -21°	260/47 -33°	260/59 -36°	270/58 -46°
MCW	used from 596 nm out; 50 nm from the line	250/36	250/24 19°	240/26 11°	250/30 5°	270/22 -9°	260/30 -21°	260/31 -36°	280/53 -38°	280/66 -48°
DBQ	used from 695 nm out; 48 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°

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
ASE Aspen, CO	departure	VFR Sky: a broken layer at 8,000 feet, overcast at 10,000 feet Weather: light rain	from the south-southeast (160°) at 4 knots	10+ mi	8,000 ft	7,837 ft	1:53 am MDT (07:53 UTC)
LXV Leadville, CO	20 nm out, 11 nm southeast of the line	VFR Sky: a few clouds at 6,000 feet	from the south (190°) at 13 knots, gusting to 25	10+ mi	none	9,933 ft	07:53 UTC
DEN Denver, CO	109 nm out, 2 nm south of the line, tower	VFR	from the south-southwest (200°) at 20 knots	10+ mi	none	5,433 ft	07:53 UTC
HEQ Holyoke, CO	229 nm out, 2 nm west of the line	VFR	from the south-southwest (210°) at 7 knots	10+ mi	none	3,729 ft	08:15 UTC
LBF North Platte, NE	308 nm out, 9 nm northwest of the line	VFR	from the east-northeast (070°) at 6 knots	10+ mi	none	2,777 ft	07:53 UTC
BBW Broken Bow, NE	358 nm out, 13 nm northwest of the line	VFR	calm	10+ mi	none	2,546 ft	07:53 UTC
BVN Albion, NE	427 nm out, 9 nm north of the line	VFR	calm	10+ mi	none	1,806 ft	08:15 UTC
MEY Mapleton, IA	536 nm out, 7 nm northwest of the line	no report just now				1,116 ft
IFA Iowa Falls, IA	646 nm out, 4 nm southeast of the line	VFR	from the south (170°) at 6 knots	10+ mi	none	1,137 ft	08:15 UTC
ALO Waterloo, IA	686 nm out, 7 nm south of the line, tower	VFR	from the south (170°) at 7 knots	10+ mi	none	873 ft	07:54 UTC
MRJ Mineral Point, WI	785 nm out, 8 nm south of the line	no report just now				1,170 ft
MSN Madison, WI	destination	VFR	from the south-southwest (200°) at 5 knots	10+ mi	none	886 ft	2:53 am CDT (07:53 UTC)

The highest airport on this list sits at 9,933 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At MSN when you get there the forecast at the estimated arrival, 8:08 am CDT (13:08 UTC)

Wind from the south-southwest at 10 knots, visibility more than 6 miles, scattered clouds at 25,000 feet VFR

The whole forecast for MSN

From Mon 1:00 am CDT (06:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, low-level wind shear, a broken layer at 25,000 feet
From Mon 7:00 am CDT (12:00 UTC): wind from the south-southwest at 10 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 8:00 pm CDT (01:00 UTC): wind from the south-southwest at 8 knots, visibility more than 6 miles, low-level wind shear, a few clouds at 25,000 feet

The forecast for ASE, the departure

From Mon 12:00 am MDT (06:00 UTC): wind from the south-southeast at 6 knots, visibility more than 6 miles, low-level wind shear, a broken layer at 8,000 feet, a broken layer at 10,000 feet
At times between Mon 12:00 am MDT (06:00 UTC) and 4:00 am MDT (10:00 UTC): visibility 4 miles, light rain showers, a broken layer at 6,000 feet
From Mon 5:00 am MDT (11:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, a few clouds at 5,000 feet, scattered clouds at 12,000 feet
From Mon 9:00 am MDT (15:00 UTC): wind from the south at 9 knots, visibility more than 6 miles, a few clouds at 4,500 feet, a few clouds at 25,000 feet
From Mon 1:00 pm MDT (19:00 UTC): wind from the south-southwest at 11 knots, gusting to 25, visibility more than 6 miles, a few clouds at 7,000 feet, a few clouds at 25,000 feet
From Mon 6:00 pm MDT (00:00 UTC): wind from the southwest at 7 knots, visibility more than 6 miles, a few clouds at 6,000 feet, a few clouds at 20,000 feet
30% chance between Mon 6:00 pm MDT (00:00 UTC) and 12:00 am MDT (06:00 UTC): visibility 4 miles, light rain showers, a broken layer at 6,000 feet

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

6/8911 DENVER, CO, Monday, October 12, 2026 UTC 3 nm from the route, 99 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZDV

Daylight

Sunset at ASE 6:31 pm MDT (00:31 UTC), at MSN 6:19 pm CDT (23:19 UTC) (civil twilight ends 6:48 pm CDT (23:48 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 Rockies · 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: Aspen-Pitkin County/Sardy Field, Dane County Rgnl/Truax Field.