Plan a flight · Sun 8:51 pm EDT (00:51 UTC)

Purdue University Airport to Willow Run Airport LAF → YIP

189 nautical miles (217 statute miles) northeast on a straight line, true course 053°, about 054° magnetic at the departure end (variation 1W). At 120 knots that is 1 h 32 min at the quickest height in today's winds (34,000 ft, a 3-knot tailwind), arriving about 10:23 pm EDT (02:23 UTC), after sunset at the destination. Right now LAF is VFR, wind calm; YIP is marginal 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: 4 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 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 20 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 LAF.

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

A320 at 33,000 ft, 43 nm northwest, 8:36 pm EDT (00:36 UTC): moderate turbulence above 33,000 ft, remarks: zob. 129 nm along the route, 43 nm northwest of the line.
as filed, and in English
```
JXN UA /OV JXN280030/TM 0036/FL330/TP A320/TB OCNL MOD 330/RM ZOB
```
Report
a routine report filed through JXN
Where
30 nm west (280°) of JXN
Time
00:36 UTC
Height
at 33,000 ft
Aircraft
A320
Turbulence
occasional moderate at 33,000 ft
Remarks
zob
E170 at 23,000 ft, 25 nm southeast, 7:14 pm EDT (23:14 UTC): light turbulence. At the departure end, 25 nm southeast of the line.
as filed, and in English
```
IND UA /OV VHP315020/TM 2314/FL230/TP E170/TB LGT
```
Report
a routine report filed through IND
Where
20 nm northwest (315°) of VHP
Time
23:14 UTC
Height
at 23,000 ft
Aircraft
E170
Turbulence
light
E145 at 2,600 ft, 20 nm southeast, 7:05 pm EDT (23:05 UTC): a routine report with nothing remarked on. 79 nm along the route, 20 nm southeast of the line.
as filed, and in English
```
FWA UA /OV FWA/TM 2305/FL026/TP E145/SK B026
```
Report
a routine report filed through FWA
Where
over FWA
Time
23:05 UTC
Height
at 2,600 ft
Aircraft
E145
Sky
B026
CRJ9 climbing, 20 nm southeast, 6:01 pm EDT (22:01 UTC): overcast from 2,500 ft to 3,300 ft. 79 nm along the route, 20 nm southeast of the line.
as filed, and in English
```
FWA UA /OV FWA/TM 2201/FLDURC/TP CRJ9/SK OVC025 - TOPS 033
```
Report
a routine report filed through FWA
Where
over FWA
Time
22:01 UTC
Height
during the climb
Aircraft
CRJ9
Sky
overcast from 2,500 ft, tops 3,300 ft
UAL2761 at 33,000 ft, 4 nm north, 7:24 pm EDT (23:24 UTC): no turbulence, wind 310° at 40 knots. 119 nm along the route, 4 nm north of the line.
as filed, and in English
```
ARP UAL2761 4139N 08447W 2324 F330 310/040KT TB SMTH IC
```
Report
a routine report filed through ARP
F2TH at 3,100 ft, 47 nm northwest, 7:40 pm EDT (23:40 UTC): remarks: tops 3,100 ft. 129 nm along the route, 47 nm northwest of the line.
as filed, and in English
```
AZO UA /OV BTL/TM 2340/FL031/TP F2TH/RM TOPS 031
```
Report
a routine report filed through AZO
Where
over BTL
Time
23:40 UTC
Height
at 3,100 ft
Aircraft
F2TH
Remarks
tops 3,100 ft
A320 climbing, 25 nm southeast, 8:14 pm EDT (00:14 UTC): overcast. 159 nm along the route, 25 nm southeast of the line.
as filed, and in English
```
TOL UA /OV TOL/TM 0014/FLDURC/TP A320/SK B025 OVC T040
```
Report
a routine report filed through TOL
Where
over TOL
Time
00:14 UTC
Height
during the climb
Aircraft
A320
Sky
B025 overcast T040
P28A descending, 40 nm southeast, 8:08 pm EDT (00:08 UTC): a broken layer from 2,200 ft to 2,500 ft. 159 nm along the route, 40 nm southeast of the line.
as filed, and in English
```
TOL UA /OV 1G0/TM 0008/FLDURD/TP P28A/SK BKN022 TOPS025
```
Report
a routine report filed through TOL
Where
over 1G0
Time
00:08 UTC
Height
during the descent
Aircraft
P28A
Sky
a broken layer from 2,200 ft, tops 2,500 ft
A320 descending, 25 nm southeast, 7:00 pm EDT (23:00 UTC): overcast from 1,600 ft to 3,500 ft, wind 350° at 9 knots. 159 nm along the route, 25 nm southeast of the line.
as filed, and in English
```
TOL UA /OV TOL/TM 2300/FLDURD/TP A320/SK OVC016 TOP035/WV 35009KTS AT 023
```
Report
a routine report filed through TOL
Where
over TOL
Time
23:00 UTC
Height
during the descent
Aircraft
A320
Sky
overcast from 1,600 ft, tops 3,500 ft
Wind
wind from 350° at 9 knots at at 2,300 ft
P28A descending, 40 nm southeast, 6:45 pm EDT (22:45 UTC): overcast above 1,400 ft. 159 nm along the route, 40 nm southeast of the line.
as filed, and in English
```
TOL UA /OV 1G0/TM 2245/FLDURD/TP P28A/SK OVC014 TOPSUNKN
```
Report
a routine report filed through TOL
Where
over 1G0
Time
22:45 UTC
Height
during the descent
Aircraft
P28A
Sky
overcast from 1,400 ft, tops unknown
C550 at 2,300 ft, 26 nm north, 8:46 pm EDT (00:46 UTC): remarks: fis 4 mile final. At the destination end, 26 nm north of the line.
as filed, and in English
```
PTK UA /OV 4W/TM 0046/FL023/TP C550/RM FIS 4 MILE FINAL
```
Report
a routine report filed through PTK
Where
4W
Time
00:46 UTC
Height
at 2,300 ft
Aircraft
C550
Remarks
fis 4 mile final
A21N descending, 8 nm east, 8:22 pm EDT (00:22 UTC): overcast above 1,500 ft. At the destination end, 8 nm east of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0022/FLDURD/TP A21N/SK OVC015
```
Report
a routine report filed through DTW
Where
over DTW
Time
00:22 UTC
Height
during the descent
Aircraft
A21N
Sky
overcast from 1,500 ft
CRJ9 descending, 8 nm east, 8:08 pm EDT (00:08 UTC): overcast above 1,100 ft, remarks: final runway 4L. At the destination end, 8 nm east of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0008/FLDURD/TP CRJ9/SK OVC 011/RM FINAL RY 4L
```
Report
a routine report filed through DTW
Where
over DTW
Time
00:08 UTC
Height
during the descent
Aircraft
CRJ9
Sky
overcast from 1,100 ft
Remarks
final runway 4L
GLF5 at 9,000 ft, 26 nm north, 7:13 pm EDT (23:13 UTC): overcast from 1,500 ft to 4,000 ft. At the destination end, 26 nm north of the line.
as filed, and in English
```
PTK UA /OV PTK 7E/TM 2313/FL090/TP GLF5/SK OVC015-TOP040
```
Report
a routine report filed through PTK
Where
ptk 7E
Time
23:13 UTC
Height
at 9,000 ft
Aircraft
GLF5
Sky
overcast from 1,500 ft, tops 4,000 ft

7 more routine reports are on the map.

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 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 2 forecast points nearest it (IND, FWA). 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	340° at 12 kt	+4 kt		116 kt	1 h 38 min	10:29 pm EDT (02:29 UTC)
5,500 ft	350° at 23 kt	+10 kt		110 kt	1 h 43 min	10:34 pm EDT (02:34 UTC)
7,500 ft	350° at 26 kt	+13 kt	12 °C	107 kt	1 h 46 min	10:37 pm EDT (02:37 UTC)
9,500 ft	360° at 27 kt	+15 kt	8 °C	105 kt	1 h 48 min	10:39 pm EDT (02:39 UTC)
11,500 ft	360° at 29 kt	+16 kt	5 °C	104 kt	1 h 49 min	10:40 pm EDT (02:40 UTC)
13,500 ft	350° at 30 kt	+15 kt	0 °C	105 kt	1 h 48 min	10:39 pm EDT (02:39 UTC)
15,500 ft	350° at 30 kt	+14 kt	-4 °C	106 kt	1 h 47 min	10:38 pm EDT (02:38 UTC)
17,500 ft	350° at 31 kt	+13 kt	-9 °C	107 kt	1 h 46 min	10:37 pm EDT (02:37 UTC)
18,000 ft FL180	350° at 31 kt	+12 kt	-10 °C	108 kt	1 h 45 min	10:36 pm EDT (02:36 UTC)
24,000 ft FL240	340° at 40 kt	+11 kt	-22 °C	109 kt	1 h 44 min	10:35 pm EDT (02:35 UTC)
30,000 ft FL300	330° at 42 kt	+7 kt	-37 °C	113 kt	1 h 40 min	10:31 pm EDT (02:31 UTC)
34,000 ft FL340	320° at 40 kt	−3 kt	-42 °C	123 kt	1 h 32 min	10:23 pm EDT (02:23 UTC)
39,000 ft FL390	320° at 48 kt	−3 kt	-48 °C	123 kt	1 h 32 min	10:23 pm EDT (02:23 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
IND	used from 0 nm out; 57 nm from the line	320/10	350/30 16°	350/32 10°	350/30 4°	340/31 -10°	340/42 -21°	340/49 -37°	320/46 -41°	320/47 -47°
FWA	used from 50 nm out; 21 nm from the line	350/9	350/24 15°	360/25 9°	360/29 4°	350/31 -10°	340/39 -22°	330/40 -37°	320/38 -43°	320/48 -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
LAF Lafayette, IN	departure	VFR	calm	10+ mi	none	605 ft	8:16 pm EDT (00:16 UTC)
GUS Peru, IN	40 nm out, 10 nm south of the line, tower	VFR	calm	10+ mi	none	810 ft	23:55 UTC
FWA Fort Wayne, IN	79 nm out, 20 nm southeast of the line, tower	VFR Sky: scattered clouds at 1,800 feet, scattered clouds at 25,000 feet	from the east-southeast (110°) at 3 knots	10+ mi	none	814 ft	23:57 UTC
GWB Auburn, IN	99 nm out, 7 nm southeast of the line	marginal VFR Sky: a broken layer at 1,900 feet	from the east-southeast (120°) at 2 knots	10+ mi	1,900 ft	880 ft	00:35 UTC
JXN Jackson, MI	159 nm out, 25 nm northwest of the line, tower	IFR Sky: overcast at 900 feet	calm	10+ mi	900 ft	1,000 ft	00:32 UTC
YIP Detroit, MI	destination	marginal VFR Sky: overcast at 2,200 feet	calm	10+ mi	2,200 ft	715 ft	7:53 pm EDT (23:53 UTC)

The highest airport on this list sits at 1,000 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At YIP when you get there the forecast at the estimated arrival, 10:23 pm EDT (02:23 UTC)

Wind from the northeast at 4 knots, visibility more than 6 miles, a broken layer at 1,000 feet, overcast at 1,500 feet marginal VFR

The whole forecast for YIP

From Sun 8:00 pm EDT (00:00 UTC): wind from the northeast at 4 knots, visibility more than 6 miles, a broken layer at 1,000 feet, overcast at 1,500 feet
From Sun 11:00 pm EDT (03:00 UTC): wind light and variable, visibility more than 6 miles, overcast at 1,400 feet
From Mon 3:00 am EDT (07:00 UTC): wind from the south-southwest at 4 knots, visibility more than 6 miles, a broken layer at 25,000 feet
At times between Mon 5:00 am EDT (09:00 UTC) and 9:00 am EDT (13:00 UTC): visibility 2 miles, mist, a broken layer at 400 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the southwest at 11 knots, gusting to 22, visibility more than 6 miles, a broken layer at 25,000 feet

The forecast for LAF, the departure

From Sun 8:00 pm EDT (00:00 UTC): wind calm, visibility more than 6 miles, a few clouds at 25,000 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the south-southwest at 8 knots, visibility more than 6 miles, scattered clouds at 20,000 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the southwest at 11 knots, gusting to 19, visibility more than 6 miles, scattered clouds at 20,000 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 LAF 7:12 pm EDT (23:12 UTC), at YIP 6:57 pm EDT (22:57 UTC) (civil twilight ends 7:25 pm EDT (23:25 UTC)). At 120 knots the arrival at YIP is after sunset there (6:59 pm EDT (22:59 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 central Great Lakes · 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: Purdue University Airport, Willow Run Airport.