Plan a flight · Mon 8:41 am MDT (14:41 UTC)

Denver International to Watertown Regional DEN → ATY

450 nautical miles (518 statute miles) northeast on a straight line, true course 045°, about 037° magnetic at the departure end (variation 8E). At 120 knots that is 2 h 23 min at the quickest height in today's winds (34,000 ft, a 69-knot tailwind), arriving about 12:04 pm CDT (17:04 UTC). Right now DEN is VFR, wind from the southwest (220°) at 7 knots; ATY is low IFR, wind from the northeast (050°) 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: 729 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 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the first 98 nm of the route.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the first 0 nm of the route.
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 304 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 DEN.

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

urgent C172 at 6,700 ft, 19 nm southwest, 6:54 am MDT (12:54 UTC): remarks: low-level wind shear + 10 knots during the climb. At the departure end, 19 nm southwest of the line.
as filed, and in English
```
APA UUA /OV KAPA/TM 1254/FL067/TP C172/RM LLWS +/- 10 KTS DURC
```
Report
an urgent report filed through APA
Where
over KAPA
Time
12:54 UTC
Height
at 6,700 ft
Aircraft
C172
Remarks
low-level wind shear + 10 knots during the climb
urgent FA7X at 6,800 ft, 19 nm southwest, 6:40 am MDT (12:40 UTC): remarks: low-level wind shear a 40-knot loss of airspeed knots during the climb runway 35R. At the departure end, 19 nm southwest of the line.
as filed, and in English
```
APA UUA /OV KAPA/TM 1240/FL068/TP FA7X/RM LLWS -40 KTS DURC RY 35R
```
Report
an urgent report filed through APA
Where
over KAPA
Time
12:40 UTC
Height
at 6,800 ft
Aircraft
FA7X
Remarks
low-level wind shear a 40-knot loss of airspeed knots during the climb runway 35R
urgent TBM7 at 100 ft, 20 nm southwest, 6:30 am MDT (12:30 UTC): light chop turbulence, remarks: low-level wind shear a 10-knot loss of airspeed. At the departure end, 20 nm southwest of the line.
as filed, and in English
```
APA UUA /OV APA140001/TM 1230/FL001/TP TBM7/TB LGT CHOP/RM LLWS +-10KTS
```
Report
an urgent report filed through APA
Where
1 nm southeast (140°) of APA
Time
12:30 UTC
Height
at 100 ft
Aircraft
TBM7
Turbulence
light chop
Remarks
low-level wind shear a 10-knot loss of airspeed
B737 at 21,000 ft, 22 nm northwest, 8:05 am MDT (14:05 UTC): moderate turbulence, remarks: mountain wave a 30-knot gain of airspeed from 25,000 ft to 15,000 ft during the descent. At the departure end, 22 nm northwest of the line.
as filed, and in English
```
DEN UA /OV DEN310025/TM 1405/FL210/TP B737/TB MOD TURB/RM MTN WAVE +30KTS 250-150 DURD
```
Report
a routine report filed through DEN
Where
25 nm northwest (310°) of DEN
Time
14:05 UTC
Height
at 21,000 ft
Aircraft
B737
Turbulence
moderate turbulence
Remarks
mountain wave a 30-knot gain of airspeed from 25,000 ft to 15,000 ft during the descent
B738 descending, 37 nm northwest, 7:01 am MDT (13:01 UTC): moderate turbulence from 11,000 ft to 20,000 ft. At the departure end, 37 nm northwest of the line.
as filed, and in English
```
DEN UA /OV 40NW DEN/TM 1301/FLDURD/TP B738/TB MOD 200-110
```
Report
a routine report filed through DEN
Where
40NW den
Time
13:01 UTC
Height
during the descent
Aircraft
B738
Turbulence
moderate from 20,000 ft to 11,000 ft
B738 descending, 41 nm southwest, 6:55 am MDT (12:55 UTC): moderate turbulence from 16,000 ft to 20,000 ft. At the departure end, 41 nm southwest of the line.
as filed, and in English
```
DEN UA /OV 40SW DEN/TM 1255/FLDURD/TP B738/TB MOD 200-160
```
Report
a routine report filed through DEN
Where
40SW den
Time
12:55 UTC
Height
during the descent
Aircraft
B738
Turbulence
moderate from 20,000 ft to 16,000 ft
C172 at 200 ft, 18 nm southwest, 6:35 am MDT (12:35 UTC): moderate turbulence, remarks: low-level wind shear a 15-knot loss of airspeed. At the departure end, 18 nm southwest of the line.
as filed, and in English
```
APA UA /OV APA350001/TM 1235/FL002/TP C172/TB MOD TURB/RM LLWS +-15KTS
```
Report
a routine report filed through APA
Where
1 nm north (350°) of APA
Time
12:35 UTC
Height
at 200 ft
Aircraft
C172
Turbulence
moderate turbulence
Remarks
low-level wind shear a 15-knot loss of airspeed
B38M at 12,000 ft, 23 nm southeast, 8:07 am MDT (14:07 UTC): moderate turbulence, remarks: from 11,000 ft to 12,000 ft. At the departure end, 23 nm southeast of the line.
as filed, and in English
```
DEN UA /OV DEN090025/TM 1407/FL120/TP B38M/TB MOD/RM 110-120
```
Report
a routine report filed through DEN
Where
25 nm east (090°) of DEN
Time
14:07 UTC
Height
at 12,000 ft
Aircraft
B38M
Turbulence
moderate
Remarks
from 11,000 ft to 12,000 ft
B737 at 16,000 ft, 37 nm northwest, 6:23 am MDT (12:23 UTC): moderate turbulence, remarks: during the descent. At the departure end, 37 nm northwest of the line.
as filed, and in English
```
DEN UA /OV DEN320040/TM 1223/FL160/TP B737/TB MOD/RM DURD
```
Report
a routine report filed through DEN
Where
40 nm northwest (320°) of DEN
Time
12:23 UTC
Height
at 16,000 ft
Aircraft
B737
Turbulence
moderate
Remarks
during the descent
E75L climbing, 3 nm south, 8:37 am MDT (14:37 UTC): light chop turbulence, remarks: zimmr sid. At the departure end, 3 nm south of the line.
as filed, and in English
```
DEN UA /OV W DEN/TM 1437/FLDURC/TP E75L/TB CONT LGT CHOP / MOD 120/RM ZIMMR SID
```
Report
a routine report filed through DEN
Where
west den
Time
14:37 UTC
Height
during the climb
Aircraft
E75L
Turbulence
continuous light chop moderate at 12,000 ft
Remarks
zimmr sid
B737 at 6,500 ft, 3 nm south, 8:32 am MDT (14:32 UTC): no turbulence. At the departure end, 3 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 1432/FL065/TP B737/TB NEG TB ON FINAL RWY17R
```
Report
a routine report filed through DEN
Where
over DEN
Time
14:32 UTC
Height
at 6,500 ft
Aircraft
B737
Turbulence
no turbulence on final runway 17R
C172 at 7,800 ft, 24 nm south, 7:57 am MDT (13:57 UTC): light to moderate chop turbulence. At the departure end, 24 nm south of the line.
as filed, and in English
```
APA UA /OV APA150006/TM 1357/FL078/TP C172/TB LGT-MOD CHOP
```
Report
a routine report filed through APA
Where
6 nm southeast (150°) of APA
Time
13:57 UTC
Height
at 7,800 ft
Aircraft
C172
Turbulence
light to moderate chop
CRJ2 at 7,000 ft, 3 nm south, 7:30 am MDT (13:30 UTC): no turbulence. At the departure end, 3 nm south of the line.
as filed, and in English
```
DEN UA /OV 5N/TM 1330/FL070/TP CRJ2/TB NEG
```
Report
a routine report filed through DEN
Where
5N
Time
13:30 UTC
Height
at 7,000 ft
Aircraft
CRJ2
Turbulence
none
B737 descending, 26 nm southwest, 7:26 am MDT (13:26 UTC): light chop turbulence from 16,000 ft to 23,000 ft, wind 235° at 53 knots. At the departure end, 26 nm southwest of the line.
as filed, and in English
```
DEN UA /OV 25SW DEN/TM 1326/FLDURD/TP B737/WV 235/53/TB OCNL LGT CHOP 230-160
```
Report
a routine report filed through DEN
Where
25SW den
Time
13:26 UTC
Height
during the descent
Aircraft
B737
Wind
235/53
Turbulence
occasional light chop from 23,000 ft to 16,000 ft

6 more routine reports are on the map.

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 5 forecast points nearest it (DEN, BFF, ONL, PIR, ABR). 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	290° at 13 kt	−5 kt	14 °C	125 kt	3 h 36 min	1:17 pm CDT (18:17 UTC)
7,500 ft	270° at 14 kt	−10 kt	12 °C	130 kt	3 h 28 min	1:09 pm CDT (18:09 UTC)
9,500 ft	250° at 18 kt	−16 kt	9 °C	136 kt	3 h 19 min	1:00 pm CDT (18:00 UTC)
11,500 ft	240° at 22 kt	−22 kt	5 °C	142 kt	3 h 10 min	12:51 pm CDT (17:51 UTC)
13,500 ft	230° at 27 kt	−27 kt	0 °C	147 kt	3 h 04 min	12:45 pm CDT (17:45 UTC)
15,500 ft	230° at 31 kt	−31 kt	-4 °C	151 kt	2 h 59 min	12:40 pm CDT (17:40 UTC)
17,500 ft	230° at 36 kt	−36 kt	-10 °C	156 kt	2 h 53 min	12:34 pm CDT (17:34 UTC)
18,000 ft FL180	230° at 37 kt	−37 kt	-11 °C	157 kt	2 h 52 min	12:33 pm CDT (17:33 UTC)
24,000 ft FL240	240° at 50 kt	−50 kt	-22 °C	170 kt	2 h 39 min	12:20 pm CDT (17:20 UTC)
30,000 ft FL300	250° at 60 kt	−56 kt	-32 °C	176 kt	2 h 33 min	12:14 pm CDT (17:14 UTC)
34,000 ft FL340	240° at 71 kt	−69 kt	-37 °C	189 kt	2 h 23 min	12:04 pm CDT (17:04 UTC)
39,000 ft FL390	240° at 71 kt	−69 kt	-45 °C	189 kt	2 h 23 min	12:04 pm CDT (17:04 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
DEN	used from 0 nm out; 25 nm from the line			230/7 11°	230/13 4°	230/40 -9°	230/48 -20°	240/66 -32°	240/88 -38°	230/100 -47°
BFF	used from 49 nm out; 70 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°
ONL	used from 196 nm out; 109 nm from the line		270/16 17°	250/25 13°	230/34 7°	230/46 -9°	240/57 -22°	250/72 -31°	250/87 -36°	250/75 -46°
PIR	used from 294 nm out; 64 nm from the line		300/15 10°	270/10 10°	220/18 4°	220/36 -11°	230/43 -21°	240/48 -33°	240/51 -37°	240/55 -44°
ABR	used from 392 nm out; 61 nm from the line	020/9	230/5 12°	190/14 11°	200/25 5°	230/37 -11°	230/50 -23°	240/39 -34°	240/49 -38°	240/55 -46°

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
DEN Denver, CO	departure	VFR Sky: a few clouds at 8,000 feet, a few clouds at 12,000 feet	from the southwest (220°) at 7 knots	10+ mi	none	5,433 ft	7:53 am MDT (13:53 UTC)
GXY Greeley, CO	29 nm out, 24 nm northwest of the line	VFR	from the east-southeast (110°) at 7 knots	8 mi	none	4,696 ft	13:56 UTC
FMM Fort Morgan, CO	49 nm out, 8 nm southeast of the line	VFR	from the east-northeast (060°) at 5 knots	10+ mi	none	4,595 ft	14:35 UTC
SNY Sidney, NE	108 nm out, 1 nm south of the line	VFR	from the south (190°) at 9 knots, gusting to 17	10+ mi	none	4,314 ft	19:53 UTC
OKS Oshkosh, NE	137 nm out, 8 nm east of the line	no report just now				3,394 ft
VTN Valentine, NE	255 nm out, 5 nm north of the line	low IFR Sky: overcast at 400 feet Weather: mist	from the north-northwest (330°) at 7 knots	3 mi	400 ft	2,595 ft	14:06 UTC
ICR Winner, SD	304 nm out, 6 nm northwest of the line	low IFR Sky: overcast at 200 feet Weather: light rain, mist	from the north-northwest (330°) at 7 knots	4 mi	200 ft	2,032 ft	14:19 UTC
HON Huron, SD	392 nm out, 6 nm north of the line	low IFR Sky: overcast at 200 feet Weather: mist	from the north-northwest (340°) at 9 knots	1.25 mi	200 ft	1,288 ft	13:55 UTC
ATY Watertown, SD	destination	low IFR Sky: overcast at 200 feet Weather: mist	from the northeast (050°) at 5 knots	1 mi	200 ft	1,749 ft	9:25 am CDT (14:25 UTC)

The highest airport on this list sits at 5,433 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At ATY when you get there the forecast at the estimated arrival, 12:04 pm CDT (17:04 UTC)

Wind from the north-northeast at 8 knots, visibility 1 mile, mist, overcast at 300 feet low IFR

The whole forecast for ATY

From Mon 9:00 am CDT (14:00 UTC): wind from the east-northeast at 8 knots, visibility ¼ mile, fog, sky obscured at 300 feet
At times between Mon 9:00 am CDT (14:00 UTC) and 10:00 am CDT (15:00 UTC): visibility ½ mile, fog
From Mon 10:00 am CDT (15:00 UTC): wind from the north-northeast at 8 knots, visibility 1 mile, mist, overcast at 300 feet
From Mon 2:00 pm CDT (19:00 UTC): wind from the north-northwest at 8 knots, visibility 1½ miles, mist, overcast at 500 feet
From Mon 3:00 pm CDT (20:00 UTC): wind from the north-northwest at 8 knots, visibility more than 6 miles, overcast at 600 feet
From Mon 6:00 pm CDT (23:00 UTC): wind from the northwest at 11 knots, gusting to 17, visibility more than 6 miles, overcast at 700 feet
From Tue 2:00 am CDT (07:00 UTC): wind from the north-northwest at 10 knots, gusting to 18, visibility more than 6 miles, overcast at 400 feet

The forecast for DEN, the departure

From Mon 6:00 am MDT (12:00 UTC): wind from the south-southwest at 15 knots, visibility more than 6 miles, clear skies
From Mon 10:00 am MDT (16:00 UTC): wind from the southwest at 14 knots, gusting to 21, visibility more than 6 miles, clear skies
From Mon 7:00 pm MDT (01:00 UTC): wind from the south at 9 knots, visibility more than 6 miles, clear skies
From Mon 11:00 pm MDT (05:00 UTC): wind from the north at 10 knots, visibility more than 6 miles, a few clouds at 2,000 feet, scattered clouds at 4,000 feet
From Tue 4:00 am MDT (10:00 UTC): wind from the north-northeast at 8 knots, visibility more than 6 miles, a broken layer at 2,000 feet
From Tue 10:00 am MDT (16:00 UTC): wind from the northeast at 7 knots, visibility more than 6 miles, a few clouds at 2,000 feet, a broken layer at 4,000 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 DEN 6:22 pm MDT (00:22 UTC), at ATY 6:49 pm CDT (23:49 UTC) (civil twilight ends 7:18 pm CDT (00:18 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, 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: Denver International, Watertown Regional.