Plan a flight · Sun 11:31 pm EDT (03:31 UTC)

Harrisburg International to Seattle-Tacoma International MDT → SEA

1,991 nautical miles (2,291 statute miles) northwest on a straight line, true course 298°, about 309° magnetic at the departure end (variation 11W). At 120 knots that is 16 h 27 min at the quickest height in today's winds (4,500 ft, a 1-knot tailwind), arriving about 12:58 pm PDT (19:58 UTC). Right now MDT is IFR, wind from the northwest (320°) at 4 knots; SEA is VFR, wind from the north-northeast (030°) at 8 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: 1 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 E11E: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 20 knots, until 12:55 am EDT (04:55 UTC). Over the first 20 nm of the route.

as issued

WSUS31 KKCI 120255
MKCE WST 120255
CONVECTIVE SIGMET 11E
VALID UNTIL 0455Z
NY NJ PA DE MD VA DC WV AND DE NJ NY MD CT VA CSTL WTRS
FROM 20NE JFK-90SE SIE-20NNW ORF-30ENE EKN-10S JST-20NE JFK
AREA EMBD TS MOV FROM 24020KT. TOPS TO FL340.

SIGMET 1C: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 40 knots, until 12:55 am EDT (04:55 UTC). Near the route, 1224 nm along the route.
as issued
```
WSUS32 KKCI 120255
MKCC WST 120255
CONVECTIVE SIGMET 1C
VALID UNTIL 0455Z
SD ND MT WY
FROM 30WSW DIK-50NW DPR-60WNW RAP-50ENE SHR-30WSW DIK
AREA TS MOV FROM 22040KT. 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 first 418 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 169 nm of the route.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 13,000 ft. Near the route, at the departure end.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 10 to 149 nm out.
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 route from 906 to 1045 nm out.
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 route from 1085 to 1722 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1443 to 1742 nm out.
AIRMET ZULU 2C: moderate icing up to 20,000 ft. Over the route from 1503 to 1931 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1533 to 1732 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 169 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 MDT.

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

E145 at 12,000 ft, 22 nm east, 8:43 pm EDT (00:43 UTC): moderate turbulence. At the departure end, 22 nm east 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
UAL1558 at 30,000 ft, 18 nm southwest, 10:22 pm EDT (02:22 UTC): moderate turbulence, -36 °C, wind 240° at 50 knots. At the departure end, 18 nm southwest of the line.
as filed, and in English
```
ARP UAL1558 4014N 07742W 0222 F300 MS36 240/050KT TB MODERATE SK CLEAR IC NONE
```
Report
a routine report filed through ARP
B752 at 30,000 ft, 21 nm southwest, 10:26 pm EDT (02:26 UTC): moderate chop turbulence, remarks: zob. At the departure end, 21 nm southwest of the line.
as filed, and in English
```
HGR UA /OV THS010020/TM 0226/FL300/TP B752/TB MOD CHOP/RM ZOB
```
Report
a routine report filed through HGR
Where
20 nm north (010°) of THS
Time
02:26 UTC
Height
at 30,000 ft
Aircraft
B752
Turbulence
moderate chop
Remarks
zob
A320 at 33,000 ft, 48 nm south, 8:36 pm EDT (00:36 UTC): moderate turbulence above 33,000 ft, remarks: zob. 398 nm along the route, 48 nm south 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
PC12 at 1,000 ft, 38 nm east, 10:28 pm EDT (02:28 UTC): overcast above 1,000 ft. At the departure end, 38 nm east of the line.
as filed, and in English
```
RDG UA /OV 2 SOUTH RDG/TM 0228/FL010/TP PC12/SK OVC010
```
Report
a routine report filed through RDG
Where
2 south rdg
Time
02:28 UTC
Height
at 1,000 ft
Aircraft
PC12
Sky
overcast from 1,000 ft
C25B at 800 ft, 4 nm west, 9:41 pm EDT (01:41 UTC): remarks: bases 800 ft. At the departure end, 4 nm west of the line.
as filed, and in English
```
MDT UA /OV CXY/TM 0141/FL008/TP C25B/RM BASES 008
```
Report
a routine report filed through MDT
Where
over CXY
Time
01:41 UTC
Height
at 800 ft
Aircraft
C25B
Remarks
bases 800 ft
E75S at 22,000 ft, 37 nm southwest, 10:51 pm EDT (02:51 UTC): light to moderate turbulence, remarks: zob. 90 nm along the route, 37 nm southwest of the line.
as filed, and in English
```
JST UA /OV JST/TM 0251/FL220/TP E75S/TB LGHT-MOD/RM ZOB
```
Report
a routine report filed through JST
Where
over JST
Time
02:51 UTC
Height
at 22,000 ft
Aircraft
E75S
Turbulence
lght-mod
Remarks
zob
CRJ7 at 600 ft, 21 nm southwest, 10:07 pm EDT (02:07 UTC): a broken layer above 1,500 ft. 319 nm along the route, 21 nm southwest of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0207/FLSFC/TP CRJ7/SK BKN 015
```
Report
a routine report filed through DTW
Where
over DTW
Time
02:07 UTC
Height
at the surface
Aircraft
CRJ7
Sky
a broken layer from 1,500 ft
CRJ7 descending, 21 nm southwest, 9:01 pm EDT (01:01 UTC): overcast above 2,800 ft. 319 nm along the route, 21 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
C25B at 2,000 ft, 5 nm east, 10:18 pm EDT (02:18 UTC): a routine report with nothing remarked on. 338 nm along the route, 5 nm east of the line.
as filed, and in English
```
PTK UA /OV 2 W/TM 0218/FL020/TP C25B/SK BASES 020 OVC
```
Report
a routine report filed through PTK
Where
2 west
Time
02:18 UTC
Height
at 2,000 ft
Aircraft
C25B
Sky
bases 2,000 ft overcast
SR22 at 1,300 ft, 2 nm east, 9:25 pm EDT (01:25 UTC): a routine report with nothing remarked on. 338 nm along the route, 2 nm east 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, 5 nm east, 8:46 pm EDT (00:46 UTC): remarks: fis 4 mile final. 338 nm along the route, 5 nm east 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
A320 descending, 14 nm northeast, 10:09 pm EDT (02:09 UTC): overcast from 1,600 ft to 3,000 ft, remarks: on final runway 18 fnt. 358 nm along the route, 14 nm northeast of the line.
as filed, and in English
```
FNT UA /OV FNT/TM 0209/FLDURD/TP A320/SK OVC016 - TOP030/RM ON FINAL RY18 FNT
```
Report
a routine report filed through FNT
Where
over FNT
Time
02:09 UTC
Height
during the descent
Aircraft
A320
Sky
overcast from 1,600 ft, tops 3,000 ft
Remarks
on final runway 18 fnt
A320 descending, 10 nm north, 9:35 pm EDT (01:35 UTC): overcast from 1,900 ft to 3,000 ft, remarks: on final runway 09 fnt. 358 nm along the route, 10 nm north 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

14 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 UTC · at 120 knots true airspeed

The westbound cruising heights for this course (VFR: even thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 17 forecast points nearest it (PSB, AGC, CLE, MKG, GRB, LSE, MSP, AXN, ABR, DIK, MLS, GGW, GTF, GPI, GEG, YKM, SEA). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
4,500 ft	170° at 2 kt	−1 kt	3 °C	121 kt	16 h 27 min	12:58 pm PDT (19:58 UTC)
6,500 ft	240° at 1 kt	+1 kt	8 °C	119 kt	16 h 44 min	1:15 pm PDT (20:15 UTC)
8,500 ft	240° at 3 kt	+3 kt	6 °C	117 kt	17 h 01 min	1:32 pm PDT (20:32 UTC)
10,500 ft	240° at 7 kt	+5 kt	2 °C	115 kt	17 h 19 min	1:50 pm PDT (20:50 UTC)
12,500 ft	240° at 10 kt	+8 kt	-1 °C	112 kt	17 h 47 min	2:18 pm PDT (21:18 UTC)
14,500 ft	250° at 13 kt	+11 kt	-5 °C	109 kt	18 h 16 min	2:47 pm PDT (21:47 UTC)
16,500 ft	250° at 16 kt	+15 kt	-9 °C	105 kt	18 h 58 min	3:29 pm PDT (22:29 UTC)
18,000 ft FL180	260° at 19 kt	+18 kt	-12 °C	102 kt	19 h 31 min	4:02 pm PDT (23:02 UTC)
24,000 ft FL240	250° at 22 kt	+20 kt	-23 °C	100 kt	19 h 55 min	4:26 pm PDT (23:26 UTC)
30,000 ft FL300	260° at 24 kt	+24 kt	-37 °C	96 kt	20 h 44 min	5:15 pm PDT (00:15 UTC)
34,000 ft FL340	260° at 34 kt	+34 kt	-42 °C	86 kt	23 h 09 min	7:40 pm PDT (02:40 UTC)
39,000 ft FL390	260° at 45 kt	+45 kt	-48 °C	75 kt	26 h 33 min	11:04 pm PDT (06:04 UTC)

Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 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
PSB	used from 0 nm out; 49 nm from the line		360/13 13°	330/14 7°	300/11 3°	290/12 -11°	240/23 -23°	270/25 -36°	250/34 -40°	250/45 -48°
AGC	used from 149 nm out; 70 nm from the line	350/14	330/20 11°	340/18 8°	330/17 3°	340/22 -11°	340/31 -22°	330/33 -36°	300/34 -41°	300/35 -47°
CLE	used from 199 nm out; 41 nm from the line	340/7	010/16 13°	350/18 8°	350/20 3°	340/31 -10°	340/46 -21°	340/54 -37°	330/62 -44°	340/65 -49°
MKG	used from 348 nm out; 88 nm from the line	260/22	290/16 15°	300/11 10°	290/5 3°	300/26 -9°	300/32 -20°	320/48 -36°	320/61 -45°	310/74 -53°
GRB	used from 498 nm out; 51 nm from the line	250/36	270/23 16°	270/14 9°	240/18 4°	280/26 -9°	280/29 -20°	290/42 -36°	290/51 -45°	290/72 -55°
LSE	used from 647 nm out; 52 nm from the line	230/40	240/24 17°	240/13 10°	250/13 6°	280/22 -9°	250/28 -21°	250/41 -34°	260/42 -44°	270/62 -53°
MSP	used from 697 nm out; 60 nm from the line	230/26	240/30 17°	240/24 12°	250/22 5°	250/35 -10°	260/36 -21°	250/41 -36°	250/49 -45°	260/58 -52°
AXN	used from 846 nm out; 17 nm from the line	100/14	250/21 14°	240/24 12°	240/31 5°	260/36 -10°	260/40 -21°	250/42 -36°	260/48 -45°	260/53 -50°
ABR	used from 946 nm out; 53 nm from the line	070/14	250/10 17°	270/16 11°	260/28 5°	260/36 -10°	260/41 -22°	270/33 -37°	260/42 -42°	260/50 -48°
DIK	used from 1095 nm out; 75 nm from the line		150/24 7°	200/38 6°	220/53 0°	230/51 -9°	230/49 -21°	240/37 -37°	240/47 -44°	250/65 -48°
MLS	used from 1244 nm out; 64 nm from the line		150/23 2°	190/29 4°	210/44 2°	220/32 -10°	210/36 -21°	200/48 -37°	230/63 -40°	240/71 -47°
GGW	used from 1344 nm out; 61 nm from the line		110/23 0°	130/20 -2°	170/24 -3°	230/44 -11°	220/51 -21°	210/52 -39°	220/64 -44°	240/85 -48°
GTF	used from 1443 nm out; 79 nm from the line		070/11	080/15 -7°	110/19 -9°	190/25 -14°	200/34 -23°	200/54 -39°	220/66 -40°	220/77 -44°
GPI	used from 1593 nm out; 65 nm from the line		070/19 -5°	100/16 -7°	080/10 -8°	130/8 -19°	170/37 -28°	200/50 -40°	210/43 -40°	220/41 -42°
GEG	used from 1742 nm out; 30 nm from the line		080/16 -2°	050/17 -7°	080/9 -10°	190/33 -21°	180/31 -32°	L/V -35°	L/V -37°	270/8 -40°
YKM	used from 1891 nm out; 58 nm from the line	070/10	040/15 -1°	020/27 -8°	030/25 -13°	020/48 -20°	010/83 -27°	010/77 -37°	010/49 -40°	350/14 -41°
SEA	used from 1941 nm out; 25 nm from the line	050/7	050/11 1°	050/12 -5°	030/31 -7°	010/61 -15°	010/69 -26°	360/73 -40°	360/62 -47°	330/21 -43°

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
MDT Harrisburg, PA	departure	IFR Sky: overcast at 800 feet	from the northwest (320°) at 4 knots	9 mi	800 ft	310 ft	11:25 pm EDT (03:25 UTC)
UNV State College, PA	60 nm out, 12 nm north of the line, tower	low IFR Sky: overcast at 300 feet Weather: mist	from the north-northeast (030°) at 6 knots	6 mi	300 ft	1,231 ft	03:15 UTC
DET Detroit, MI	309 nm out, 5 nm southwest of the line, tower	marginal VFR Sky: scattered clouds at 500 feet, overcast at 1,800 feet Weather: mist	calm	5 mi	1,800 ft	624 ft	03:05 UTC
OSH Oshkosh, WI	567 nm out, 9 nm southwest of the line, tower	VFR	from the south (190°) at 9 knots	10+ mi	none	808 ft	02:53 UTC
EAU Eau Claire, WI	707 nm out, 2 nm north of the line, tower	VFR	from the south (180°) at 9 knots	10+ mi	none	913 ft	02:56 UTC
STC St Cloud, MN	826 nm out, 9 nm northeast of the line, tower	VFR	from the north-northwest (340°) at 3 knots	10+ mi	none	1,030 ft	02:53 UTC
BIS Bismarck, ND	1115 nm out, 14 nm northeast of the line, tower	marginal VFR Sky: overcast at 1,200 feet	from the northeast (040°) at 9 knots	10+ mi	1,200 ft	1,661 ft	02:52 UTC
JDN Jordan, MT	1364 nm out, 7 nm northwest of the line	reported, no category	from the northeast (050°) at 14 knots		none	2,667 ft	02:48 UTC
GTF Great Falls, MT	1543 nm out, 4 nm west of the line, tower	low IFR Sky: a few clouds at 300 feet, overcast at 700 feet Weather: light snow, mist	from the north-northeast (020°) at 10 knots	0.75 mi	700 ft	3,680 ft	02:53 UTC
THM Thompson Falls, MT	1702 nm out, 4 nm southwest of the line	no report just now				2,467 ft
GEG Spokane, WA	1802 nm out, 5 nm east of the line, tower	VFR Sky: a broken layer at 6,000 feet, a broken layer at 11,000 feet	from the northeast (040°) at 10 knots	10+ mi	6,000 ft	2,385 ft	02:53 UTC
SEA Seattle, WA	destination	VFR Sky: a few clouds at 3,000 feet	from the north-northeast (030°) at 8 knots	10+ mi	none	432 ft	7:53 pm PDT (02:53 UTC)

The highest airport on this list sits at 3,680 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SEA when you get there the forecast at the estimated arrival, 12:58 pm PDT (19:58 UTC)

Wind from the west at 6 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for SEA

From Sun 8:00 pm PDT (03:00 UTC): wind from the north at 6 knots, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind from the southeast at 4 knots, visibility more than 6 miles, patches of fog, clear skies
From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 4 knots, visibility more than 6 miles, clear skies
From Mon 11:00 am PDT (18:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind from the northwest at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for MDT, the departure

From Sun 11:00 pm EDT (03:00 UTC): wind from the northeast at 3 knots, visibility more than 6 miles, light rain showers, overcast at 800 feet
From Mon 2:00 am EDT (06:00 UTC): wind from the north at 7 knots, visibility 4 miles, mist, scattered clouds at 700 feet, overcast at 1,200 feet
From Mon 8:00 am EDT (12:00 UTC): wind from the north-northwest at 10 knots, visibility 6 miles, mist, scattered clouds at 1,500 feet, overcast at 4,000 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the northwest at 10 knots, visibility more than 6 miles, a broken layer at 2,500 feet, overcast at 4,000 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the northwest at 8 knots, visibility more than 6 miles, a broken layer at 4,000 feet

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

6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, 179 nm along the route · a VIP movement · today · ZOB
6/8888 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 21 nm from the route, 189 nm along the route · security · today · ZOB
6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 17 nm from the route, 189 nm along the route · a VIP movement · today · ZOB
6/6656 ANOKA, MN, Monday, October 5, 2026 through Monday, October 19, 2026 Local 4 nm from the route, 786 nm along the route · security · until 19 October · ZMP

Daylight

Sunset at MDT 6:32 pm EDT (22:32 UTC), at SEA 6:27 pm PDT (01:27 UTC) (civil twilight ends 6:58 pm PDT (01:58 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 Northeast · loop National Weather Service

Radar now, the central Great Lakes · 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: Harrisburg International, Seattle-Tacoma International.