Plan a flight · Sun 9:05 pm CDT (02:05 UTC)

Green Bay/Austin Straubel International to Philadelphia International GRB → PHL

636 nautical miles (732 statute miles) east on a straight line, true course 111°, about 113° magnetic at the departure end (variation 2W). At 120 knots that is 4 h 02 min at the quickest height in today's winds (39,000 ft, a 38-knot tailwind), arriving about 2:07 am EDT (06:07 UTC), after sunset at the destination. Right now GRB is VFR, wind from the south (190°) at 6 knots; PHL is IFR, wind from the east-northeast (070°) at 11 knots, gusting to 18. 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: 9 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 6E: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 20 knots, until 10:55 pm CDT (03:55 UTC). Over the last 70 nm of the route.

as issued

WSUS31 KKCI 120155
MKCE WST 120155
CONVECTIVE SIGMET 6E
VALID UNTIL 0355Z
NY NJ PA DE MD AND DE NJ NY MD CSTL WTRS
FROM 20WNW SAX-70S HTO-50ESE SBY-30WSW HAR-20WNW SAX
AREA EMBD TS MOV FROM 22020KT. TOPS TO FL300.

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 407 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the route from 387 to 616 nm out.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 417 to 556 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 GRB.

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

E145 at 12,000 ft, 11 nm southwest, 7:43 pm CDT (00:43 UTC): moderate turbulence. 586 nm along the route, 11 nm southwest of the line.
as filed, and in English
```
LNS UA /OV LRP/TM 0043/FL120/TP E145/TB CONS MOD
```
Report
a routine report filed through LNS
Where
over LRP
Time
00:43 UTC
Height
at 12,000 ft
Aircraft
E145
Turbulence
continuous moderate
A21N at 18,000 ft, 11 nm north, 7:38 pm CDT (00:38 UTC): moderate clear-air turbulence. At the destination end, 11 nm north of the line.
as filed, and in English
```
PTW UA /OV PTW/TM 0038/FL180/TP A21N/TB MOD CAT
```
Report
a routine report filed through PTW
Where
over PTW
Time
00:38 UTC
Height
at 18,000 ft
Aircraft
A21N
Turbulence
moderate clear-air turbulence
E75L at 20,000 ft, 19 nm southwest, 7:41 pm CDT (00:41 UTC): moderate turbulence above 20,000 ft. At the destination end, 19 nm southwest of the line.
as filed, and in English
```
ILG UA /OV DQO/TM 0041/FL200/TP E75L/TB MOD 200
```
Report
a routine report filed through ILG
Where
over DQO
Time
00:41 UTC
Height
at 20,000 ft
Aircraft
E75L
Turbulence
moderate at 20,000 ft
BCS3 at 19,000 ft, 41 nm south, 7:18 pm CDT (00:18 UTC): moderate turbulence above 17,000 ft, -9 °C. At the destination end, 41 nm south of the line.
as filed, and in English
```
DOV UA /OV ENO/TM 0018/FL190/TP BCS3/TA M09/TB MOD 170
```
Report
a routine report filed through DOV
Where
over ENO
Time
00:18 UTC
Height
at 19,000 ft
Aircraft
BCS3
Temperature
−9 °C
Turbulence
moderate at 17,000 ft
A21N at 31,000 ft, 9 nm north, 7:39 pm CDT (00:39 UTC): light turbulence above 31,000 ft, remarks: zob. 159 nm along the route, 9 nm north of the line.
as filed, and in English
```
MOP UA /OV MOP/TM 0039/FL310/TP A21N/TB CONS LGT 310/RM ZOB
```
Report
a routine report filed through MOP
Where
over MOP
Time
00:39 UTC
Height
at 31,000 ft
Aircraft
A21N
Turbulence
continuous light at 31,000 ft
Remarks
zob
A320 descending, 15 nm southwest, 8:35 pm CDT (01:35 UTC): overcast from 1,900 ft to 3,000 ft, remarks: on final runway 09 fnt. 209 nm along the route, 15 nm southwest of the line.
as filed, and in English
```
FNT UA /OV FNT270008/TM 0135/FLDURD/TP A320/SK OVC019 - TOP030/RM ON FINAL RY09 FNT
```
Report
a routine report filed through FNT
Where
8 nm west (270°) of FNT
Time
01:35 UTC
Height
during the descent
Aircraft
A320
Sky
overcast from 1,900 ft, tops 3,000 ft
Remarks
on final runway 09 fnt
SR22 at 1,300 ft, 22 nm southwest, 8:25 pm CDT (01:25 UTC): a routine report with nothing remarked on. 229 nm along the route, 22 nm southwest of the line.
as filed, and in English
```
PTK UA /OV PTK270003/TM 0125/FL013/TP SR22/SK BASES 019 OVC
```
Report
a routine report filed through PTK
Where
3 nm west (270°) of PTK
Time
01:25 UTC
Height
at 1,300 ft
Aircraft
SR22
Sky
bases 1,900 ft overcast
C550 at 2,300 ft, 21 nm south, 7:46 pm CDT (00:46 UTC): remarks: fis 4 mile final. 229 nm along the route, 21 nm south 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
GLF5 at 9,000 ft, 21 nm south, 6:13 pm CDT (23:13 UTC): overcast from 1,500 ft to 4,000 ft. 229 nm along the route, 21 nm south 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
CRJ7 descending, 44 nm southwest, 8:01 pm CDT (01:01 UTC): overcast above 2,800 ft. 248 nm along the route, 44 nm southwest of the line.
as filed, and in English
```
DTW UA /OV FINAL 3R /TM 0101/FLDURD/TP CRJ7/SK OVC 028
```
Report
a routine report filed through DTW
Where
final 3R
Time
01:01 UTC
Height
during the descent
Aircraft
CRJ7
Sky
overcast from 2,800 ft
A21N descending, 44 nm southwest, 7:22 pm CDT (00:22 UTC): overcast above 1,500 ft. 248 nm along the route, 44 nm southwest 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, 44 nm southwest, 7:08 pm CDT (00:08 UTC): overcast above 1,100 ft, remarks: final runway 4L. 248 nm along the route, 44 nm southwest 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
AC90 descending, 9 nm southwest, 7:13 pm CDT (00:13 UTC): a routine report with nothing remarked on. 368 nm along the route, 9 nm southwest of the line.
as filed, and in English
```
ERI UA /OV ERI240015/TM 0013/FLDURD/TP AC90/SK T046 B042
```
Report
a routine report filed through ERI
Where
15 nm southwest (240°) of ERI
Time
00:13 UTC
Height
during the descent
Aircraft
AC90
Sky
T046 B042
AC90 , 10 nm north, 7:16 pm CDT (00:16 UTC): a routine report with nothing remarked on. 378 nm along the route, 10 nm north of the line.
as filed, and in English
```
ERI UA /OV ERI060006/TM 0016/FLB3.0/TP AC90
```
Report
a routine report filed through ERI
Where
6 nm northeast (060°) of ERI
Time
00:16 UTC
Height
at B3.0
Aircraft
AC90

16 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 6 forecast points nearest it (GRB, MKG, CLE, PSB, AVP, ACY). 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	250° at 3 kt	−2 kt		122 kt	5 h 13 min	3:18 am EDT (07:18 UTC)
5,500 ft	270° at 9 kt	−8 kt	13 °C	128 kt	4 h 58 min	3:03 am EDT (07:03 UTC)
7,500 ft	270° at 11 kt	−10 kt	11 °C	130 kt	4 h 54 min	2:59 am EDT (06:59 UTC)
9,500 ft	270° at 12 kt	−11 kt	8 °C	131 kt	4 h 51 min	2:56 am EDT (06:56 UTC)
11,500 ft	280° at 11 kt	−10 kt	4 °C	130 kt	4 h 54 min	2:59 am EDT (06:59 UTC)
13,500 ft	280° at 12 kt	−11 kt	0 °C	131 kt	4 h 51 min	2:56 am EDT (06:56 UTC)
15,500 ft	270° at 15 kt	−13 kt	-5 °C	133 kt	4 h 47 min	2:52 am EDT (06:52 UTC)
17,500 ft	270° at 17 kt	−15 kt	-9 °C	135 kt	4 h 43 min	2:48 am EDT (06:48 UTC)
18,000 ft FL180	270° at 18 kt	−15 kt	-10 °C	135 kt	4 h 43 min	2:48 am EDT (06:48 UTC)
24,000 ft FL240	280° at 16 kt	−15 kt	-21 °C	135 kt	4 h 43 min	2:48 am EDT (06:48 UTC)
30,000 ft FL300	270° at 33 kt	−28 kt	-35 °C	148 kt	4 h 18 min	2:23 am EDT (06:23 UTC)
34,000 ft FL340	250° at 41 kt	−29 kt	-42 °C	149 kt	4 h 16 min	2:21 am EDT (06:21 UTC)
39,000 ft FL390	260° at 50 kt	−38 kt	-49 °C	158 kt	4 h 02 min	2:07 am EDT (06:07 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
GRB	used from 0 nm out; 25 nm from the line	240/24	260/18 16°	270/20 11°	290/14 4°	280/24 -9°	300/34 -21°	310/51 -38°	310/54 -48°	300/71 -51°
MKG	used from 50 nm out; 53 nm from the line	250/5	320/10 15°	310/19 9°	320/21 3°	310/23 -10°	330/37 -22°	330/51 -38°	320/44 -47°	300/60 -49°
CLE	used from 199 nm out; 119 nm from the line	340/5	320/13 14°	300/12 8°	310/10 2°	310/14 -10°	340/14 -23°	320/27 -35°	260/28 -40°	250/36 -48°
PSB	used from 397 nm out; 71 nm from the line		260/13 13°	220/12 8°	220/11 4°	230/27 -11°	210/31 -21°	220/73 -32°	220/75 -40°	230/66 -50°
AVP	used from 546 nm out; 65 nm from the line	110/36	190/34 13°	230/11 8°	230/16 4°	230/26 -8°	220/40 -19°	230/73 -33°	230/98 -41°	230/87 -51°
ACY	used from 596 nm out; 59 nm from the line	230/15	230/22 15°	230/31 11°	230/27 6°	230/40 -7°	230/51 -17°	230/71 -31°	230/81 -41°	230/86 -53°

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
GRB Green Bay, WI	departure	VFR	from the south (190°) at 6 knots	10+ mi	none	695 ft	8:53 pm CDT (01:53 UTC)
MTW Manitowoc, WI	30 nm out, 13 nm southwest of the line	VFR	from the south (170°) at 6 knots	10+ mi	none	650 ft	01:56 UTC
LDM Ludington, MI	79 nm out, 2 nm south of the line	VFR	from the south (190°) at 7 knots	10+ mi	none	646 ft	01:55 UTC
MBS Saginaw, MI	179 nm out, 16 nm northeast of the line, tower	VFR	from the south (180°) at 6 knots	10+ mi	none	668 ft	01:53 UTC
FNT Flint, MI	209 nm out, 10 nm south of the line, tower	marginal VFR Sky: overcast at 1,000 feet	from the south (170°) at 3 knots	10+ mi	1,000 ft	782 ft	01:53 UTC
PHN Port Huron, MI	258 nm out, 10 nm northeast of the line	IFR Sky: a broken layer at 500 feet, overcast at 900 feet Weather: mist	from the southwest (230°) at 2 knots	3 mi	500 ft	650 ft	01:55 UTC
ERI Erie, PA	378 nm out, 10 nm north of the line, tower	marginal VFR Sky: overcast at 3,000 feet	variable at 4 knots	10+ mi	3,000 ft	732 ft	00:51 UTC
GKJ Meadville, PA	387 nm out, 15 nm southwest of the line	VFR	variable at 3 knots	10+ mi	none	1,399 ft	01:53 UTC
UNV State College, PA	507 nm out, 8 nm southwest of the line, tower	low IFR Sky: overcast at 300 feet Weather: rain, mist	from the northeast (040°) at 5 knots	1.5 mi	300 ft	1,231 ft	01:53 UTC
MDT Harrisburg, PA	566 nm out, 18 nm southwest of the line, tower	IFR Sky: overcast at 700 feet Weather: light rain, mist	variable at 5 knots	5 mi	700 ft	310 ft	01:56 UTC
LNS Lancaster, PA	586 nm out, 11 nm southwest of the line, tower	IFR Sky: overcast at 900 feet	from the northeast (040°) at 8 knots	10+ mi	900 ft	402 ft	02:00 UTC
PHL Philadelphia, PA	destination	IFR Sky: overcast at 600 feet Weather: light rain, mist	from the east-northeast (070°) at 11 knots, gusting to 18	5 mi	600 ft	35 ft	9:54 pm EDT (01:54 UTC)

The highest airport on this list sits at 1,399 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At PHL when you get there the forecast at the estimated arrival, 2:07 am EDT (06:07 UTC)

Wind from the north-northeast at 8 knots, visibility 5 miles, light rain, mist, overcast at 500 feet IFR

The whole forecast for PHL

From Sun 8:00 pm EDT (00:00 UTC): wind from the northeast at 10 knots, visibility 3 miles, light rain, mist, overcast at 800 feet
From Sun 11:00 pm EDT (03:00 UTC): wind from the north-northeast at 8 knots, visibility 5 miles, light rain, mist, overcast at 500 feet
From Mon 6:00 am EDT (10:00 UTC): wind from the north-northeast at 10 knots, visibility 5 miles, mist, overcast at 800 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the north at 12 knots, gusting to 19, visibility more than 6 miles, overcast at 2,500 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the north at 12 knots, gusting to 21, visibility more than 6 miles, overcast at 5,000 feet
From Mon 6:00 pm EDT (22:00 UTC): wind from the west-northwest at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for GRB, the departure

From Sun 7:00 pm CDT (00:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, clear skies
From Sun 9:00 pm CDT (02:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, low-level wind shear, clear skies
From Mon 12:00 am CDT (05:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, low-level wind shear, scattered clouds at 20,000 feet
From Mon 8:00 am CDT (13:00 UTC): wind from the south-southwest at 7 knots, visibility more than 6 miles, a broken layer at 25,000 feet
From Mon 1:00 pm CDT (18:00 UTC): wind from the southwest at 6 knots, visibility more than 6 miles, scattered clouds at 4,500 feet

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

6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 17 nm from the route, 378 nm along the route · a VIP movement · today · ZOB
6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 17 nm from the route, 378 nm along the route · a VIP movement · today · ZOB

Daylight

Sunset at GRB 6:13 pm CDT (23:13 UTC), at PHL 6:26 pm EDT (22:26 UTC) (civil twilight ends 6:53 pm EDT (22:53 UTC)). At 120 knots the arrival at PHL is before sunrise there (7:07 am EDT (11:07 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 upper Mississippi valley · loop National Weather Service

Radar now, the central Great Lakes · loop National Weather Service

Radar now, the Northeast · 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: Green Bay/Austin Straubel International, Philadelphia International.