Plan a flight · Mon 10:51 am EDT (14:51 UTC)

Nantucket Memorial to Long Island Mac Arthur Airport ACK → ISP

140 nautical miles (162 statute miles) west on a straight line, true course 260°, about 274° magnetic at the departure end (variation 14W). At 120 knots that is 1 h 11 min at the quickest height in today's winds (4,500 ft, a 2-knot headwind), arriving about 12:02 pm EDT (16:02 UTC). Right now ACK is IFR, wind from the north-northeast (030°) at 21 knots, gusting to 28; ISP is VFR, wind from the north (360°) at 10 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 SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the whole route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 40,000 ft. Over the whole 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 ACK.

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

BCS3 at 5,000 ft, 3 nm west, 9:25 am EDT (13:25 UTC): moderate chop turbulence from 3,000 ft to 5,000 ft. 19 nm along the route, 3 nm west of the line.
as filed, and in English
```
ACK UA /OV CLAMY/TM 1325/FL050/TP BCS3/TB MOD CHOP 050-030
```
Report
a routine report filed through ACK
Where
clamy
Time
13:25 UTC
Height
at 5,000 ft
Aircraft
BCS3
Turbulence
moderate chop from 5,000 ft to 3,000 ft
PC12 at 400 ft, 2 nm northeast, 10:10 am EDT (14:10 UTC): overcast from 40,000 ft to 1,700 ft, remarks: during the descent runway 6. At the departure end, 2 nm northeast of the line.
as filed, and in English
```
ACK UA /OV ACK/TM 1410/FL004/TP PC12/SK OVC004-TOP017/RM DURD RY6
```
Report
a routine report filed through ACK
Where
over ACK
Time
14:10 UTC
Height
at 400 ft
Aircraft
PC12
Sky
overcast from 400 ft, tops 1,700 ft
Remarks
during the descent runway 6
E550 at 3,000 ft, 7 nm northeast, 9:25 am EDT (13:25 UTC): a routine report with nothing remarked on. At the departure end, 7 nm northeast of the line.
as filed, and in English
```
ACK UA /OV ACK040005/TM 1325/FL030/TP E550/SK BASES008 TOPS021
```
Report
a routine report filed through ACK
Where
5 nm northeast (040°) of ACK
Time
13:25 UTC
Height
at 3,000 ft
Aircraft
E550
Sky
BASES008 TOPS021
CL35 at 600 ft, 2 nm northeast, 9:10 am EDT (13:10 UTC): remarks: during the descent runway 6 runway in sight at 400FT. At the departure end, 2 nm northeast of the line.
as filed, and in English
```
ACK UA /OV ACK/TM 1310/FL006/TP CL35/SK TOP012-BKN006/RM DURD RY6 RWY IN SIGHT AT 400FT
```
Report
a routine report filed through ACK
Where
over ACK
Time
13:10 UTC
Height
at 600 ft
Aircraft
CL35
Sky
TOP012-BKN006
Remarks
during the descent runway 6 runway in sight at 400FT
C750 at 300 ft, 2 nm northeast, 9:02 am EDT (13:02 UTC): overcast from 30,000 ft to 1,100 ft. At the departure end, 2 nm northeast of the line.
as filed, and in English
```
ACK UA /OV ACK/TM 1302/FL003/TP C750/SK OVC003TOPS011
```
Report
a routine report filed through ACK
Where
over ACK
Time
13:02 UTC
Height
at 300 ft
Aircraft
C750
Sky
overcast from 300 ft, tops 1,100 ft
PC12 at 300 ft, 2 nm northeast, 8:10 am EDT (12:10 UTC): overcast above 30,000 ft, remarks: during the descent runway 6. At the departure end, 2 nm northeast of the line.
as filed, and in English
```
ACK UA /OV ACK/TM 1210/FL003/TP PC12/SK OVC003/WX 1SM/RM DURD RY6
```
Report
a routine report filed through ACK
Where
over ACK
Time
12:10 UTC
Height
at 300 ft
Aircraft
PC12
Sky
overcast from 300 ft
Weather
1SM
Remarks
during the descent runway 6
C402 at 500 ft, 27 nm north, 8:53 am EDT (12:53 UTC): light chop turbulence, remarks: during the descent runway 6. 9 nm along the route, 27 nm north of the line.
as filed, and in English
```
HYA UA /OV HYA/TM 1253/FL005/TP C402/SK TOPS 1800FT BASES 500FT/TB LGT CHOP BLW 1000FT/RM DURD RY6
```
Report
a routine report filed through HYA
Where
over HYA
Time
12:53 UTC
Height
at 500 ft
Aircraft
C402
Sky
tops 1800FT bases 500FT
Turbulence
light chop below 1000FT
Remarks
during the descent runway 6
B350 at 400 ft, 27 nm north, 8:48 am EDT (12:48 UTC): remarks: during the climb runway 6. 9 nm along the route, 27 nm north of the line.
as filed, and in English
```
HYA UA /OV HYA/TM 1248/FL004/TP B350/SK BASES 400FT/RM DURC RY6
```
Report
a routine report filed through HYA
Where
over HYA
Time
12:48 UTC
Height
at 400 ft
Aircraft
B350
Sky
bases 400FT
Remarks
during the climb runway 6
C182 at 500 ft, 32 nm north, 10:36 am EDT (14:36 UTC): overcast above 500 ft. 37 nm along the route, 32 nm north of the line.
as filed, and in English
```
EWB UA /OV EWB RY05 DEPT/TM 1436/FL005/TP C182/SK OVC005
```
Report
a routine report filed through EWB
Where
ewb runway 05 dept
Time
14:36 UTC
Height
at 500 ft
Aircraft
C182
Sky
overcast from 500 ft
H25B at 600 ft, 32 nm north, 9:46 am EDT (13:46 UTC): overcast above 600 ft. 37 nm along the route, 32 nm north of the line.
as filed, and in English
```
EWB UA /OV EWB RY05 DEPT/TM 1346/FL006/TP H25B/SK OVC006
```
Report
a routine report filed through EWB
Where
ewb runway 05 dept
Time
13:46 UTC
Height
at 600 ft
Aircraft
H25B
Sky
overcast from 600 ft
C182 at 500 ft, 32 nm north, 9:26 am EDT (13:26 UTC): overcast above 500 ft, sand, dust whirls. 37 nm along the route, 32 nm north of the line.
as filed, and in English
```
EWB UA /OV EWB RY05 APCH/TM 1326/FL005/TP C182/SK OVC005/WX SAW AIRPORT ON 1/2 NM FINAL
```
Report
a routine report filed through EWB
Where
ewb runway 05 approach
Time
13:26 UTC
Height
at 500 ft
Aircraft
C182
Sky
overcast from 500 ft
Weather
sand w, airport, on, 1/2, nautical miles, final
SR22 at 400 ft, 32 nm north, 7:56 am EDT (11:56 UTC): light turbulence, overcast above 40,000 ft. 37 nm along the route, 32 nm north of the line.
as filed, and in English
```
EWB UA /OV EWB RY05 DEPT/TM 1156/FL004/TP SR22/SK OVC004/TB LT TBC
```
Report
a routine report filed through EWB
Where
ewb runway 05 dept
Time
11:56 UTC
Height
at 400 ft
Aircraft
SR22
Sky
overcast from 400 ft
Turbulence
lt tbc
PC12 at 600 ft, 39 nm north, 9:00 am EDT (13:00 UTC): overcast above 600 ft, remarks: bases runway 34 departure end. 56 nm along the route, 39 nm north of the line.
as filed, and in English
```
PVD UA /OV PVD/TM 1300/FL006/TP PC12/SK OVC006/RM BASES RY34 DEPARTURE END
```
Report
a routine report filed through PVD
Where
over PVD
Time
13:00 UTC
Height
at 600 ft
Aircraft
PC12
Sky
overcast from 600 ft
Remarks
bases runway 34 departure end
PC12 descending, 3 nm southeast, 7:55 am EDT (11:55 UTC): overcast above 800 ft. 122 nm along the route, 3 nm southeast of the line.
as filed, and in English
```
FOK UA /OV FOK/TM 1155/FLDURD/TP PC12/SK OVC008
```
Report
a routine report filed through FOK
Where
over FOK
Time
11:55 UTC
Height
during the descent
Aircraft
PC12
Sky
overcast from 800 ft

16 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 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 2 forecast points nearest it (ACK, JFK). 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	340° at 18 kt	+2 kt		118 kt	1 h 11 min	12:02 pm EDT (16:02 UTC)
6,500 ft	330° at 21 kt	+5 kt	11 °C	115 kt	1 h 13 min	12:04 pm EDT (16:04 UTC)
8,500 ft	330° at 25 kt	+7 kt	8 °C	113 kt	1 h 14 min	12:05 pm EDT (16:05 UTC)
10,500 ft	330° at 26 kt	+6 kt	5 °C	114 kt	1 h 14 min	12:05 pm EDT (16:05 UTC)
12,500 ft	340° at 26 kt	+6 kt	1 °C	114 kt	1 h 14 min	12:05 pm EDT (16:05 UTC)
14,500 ft	330° at 26 kt	+7 kt	-3 °C	113 kt	1 h 14 min	12:05 pm EDT (16:05 UTC)
16,500 ft	330° at 26 kt	+7 kt	-6 °C	113 kt	1 h 14 min	12:05 pm EDT (16:05 UTC)
18,000 ft FL180	330° at 26 kt	+8 kt	-9 °C	112 kt	1 h 15 min	12:06 pm EDT (16:06 UTC)
24,000 ft FL240	320° at 27 kt	+13 kt	-22 °C	107 kt	1 h 19 min	12:10 pm EDT (16:10 UTC)
30,000 ft FL300	320° at 34 kt	+15 kt	-37 °C	105 kt	1 h 20 min	12:11 pm EDT (16:11 UTC)
34,000 ft FL340	300° at 32 kt	+23 kt	-44 °C	97 kt	1 h 27 min	12:18 pm EDT (16:18 UTC)
39,000 ft FL390	290° at 41 kt	+37 kt	-51 °C	83 kt	1 h 41 min	12:32 pm EDT (16:32 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
ACK	used from 0 nm out; 23 nm from the line	350/16	330/18 12°	330/26 7°	330/27 2°	320/25 -9°	300/27 -22°	300/31 -38°	270/36 -44°	270/45 -50°
JFK	used from 94 nm out; 56 nm from the line	360/20	340/23 11°	340/26 8°	350/26 3°	350/30 -8°	350/36 -21°	350/52 -36°	350/54 -44°	320/45 -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
ACK Nantucket, MA	departure	IFR Sky: overcast at 500 feet	from the north-northeast (030°) at 21 knots, gusting to 28	8 mi	500 ft	46 ft	9:53 am EDT (13:53 UTC)
MVY Vineyard Haven, MA	19 nm out, 14 nm northwest of the line, tower	IFR Sky: overcast at 500 feet	from the north (010°) at 14 knots, gusting to 26	10+ mi	500 ft	66 ft	13:53 UTC
GON Groton (New London), CT	84 nm out, 22 nm north of the line, tower	marginal VFR Sky: a broken layer at 2,800 feet, overcast at 3,500 feet	from the north-northwest (340°) at 14 knots	10+ mi	2,800 ft	9 ft	14:47 UTC
FOK Westhampton Beach, NY	122 nm out, 3 nm east of the line, tower	IFR Sky: overcast at 600 feet	from the north (360°) at 11 knots	10+ mi	600 ft	66 ft	13:53 UTC
ISP New York, NY	destination	VFR Sky: scattered clouds at 1,300 feet, scattered clouds at 3,300 feet, scattered clouds at 20,000 feet	from the north (360°) at 10 knots	10+ mi	none	98 ft	10:19 am EDT (14:19 UTC)

The highest airport on this list sits at 98 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At ISP when you get there the forecast at the estimated arrival, 12:02 pm EDT (16:02 UTC)

Wind from the north at 11 knots, gusting to 20, visibility more than 6 miles, a broken layer at 1,500 feet marginal VFR

At times between Mon 12:00 pm EDT (16:00 UTC) and 1:00 pm EDT (17:00 UTC): scattered clouds at 1,500 feet, a broken layer at 3,500 feet VFR

The whole forecast for ISP

From Mon 11:00 am EDT (15:00 UTC): wind from the north at 11 knots, gusting to 20, visibility more than 6 miles, a broken layer at 1,500 feet
At times between Mon 12:00 pm EDT (16:00 UTC) and 1:00 pm EDT (17:00 UTC): scattered clouds at 1,500 feet, a broken layer at 3,500 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the north-northwest at 10 knots, visibility more than 6 miles, a few clouds at 2,500 feet, scattered clouds at 4,000 feet
From Mon 10:00 pm EDT (02:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 5,000 feet, a few clouds at 15,000 feet

The forecast for ACK, the departure

From Mon 10:00 am EDT (14:00 UTC): wind from the north-northeast at 23 knots, gusting to 30, visibility 6 miles, mist, overcast at 400 feet
From Mon 4:00 pm EDT (20:00 UTC): wind from the north at 10 knots, gusting to 17, visibility more than 6 miles, scattered clouds at 3,000 feet
From Tue 1:00 am EDT (05:00 UTC): wind from the north-northeast at 5 knots, visibility more than 6 miles, a broken layer at 2,500 feet
From Tue 5:00 am EDT (09:00 UTC): wind from the east-northeast at 10 knots, gusting to 17, visibility 6 miles, light rain, mist, overcast at 800 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 ACK 6:04 pm EDT (22:04 UTC), at ISP 6:17 pm EDT (22:17 UTC) (civil twilight ends 6:44 pm EDT (22:44 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, 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: Nantucket Memorial, Long Island Mac Arthur Airport.