Nantucket Memorial to New York Stewart International ACK → SWF
183 nautical miles (210 statute miles) west on a straight line, true course 276°, about 290° magnetic at the departure end (variation 14W). At 120 knots that is 1 h 42 min at the quickest height in today's winds (4,500 ft, a 12-knot headwind), arriving about 2:56 am EDT (06:56 UTC), after sunset at the destination. Right now ACK is IFR, wind from the east (080°) at 9 knots, gusting to 18; SWF is marginal VFR, wind from the north-northeast (030°) at 7 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 E18E: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 35 knots, until 2:55 am EDT (06:55 UTC). Over the first 67 nm of the route.
as issued
WSUS31 KKCI 120455 MKCE WST 120455 CONVECTIVE SIGMET 18E VALID UNTIL 0655Z MA RI CT AND MA RI NY CSTL WTRS FROM 40E BOS-130SE ACK-170S ACK-50SE HTO-20NW PVD-40E BOS AREA EMBD TS MOV FROM 24035KT. TOPS TO FL300.
- SIGMET E19E: thunderstorms (a convective SIGMET) up to 43,000 ft, moving from the southwest at 20 knots, until 2:55 am EDT (06:55 UTC). Near the route, 106 nm along the route.
as issued
WSUS31 KKCI 120455 MKCE WST 120455 CONVECTIVE SIGMET 19E VALID UNTIL 0655Z CT NY NJ PA DE MD VA DC WV AND DE NJ NY MD CT VA CSTL WTRS FROM 20NNW HTO-70SSE HTO-90SE SIE-20WNW LYH-40ESE AIR-20NNW HTO AREA EMBD TS MOV FROM 24020KT. TOPS TO FL430.
- 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 4W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the first 48 nm of the route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 10,000 ft. Over the first 115 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 144 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 ACK.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- A320 descending, 39 nm south, 10:45 pm EDT (02:45 UTC): remarks: final runway 24. 135 nm along the route, 39 nm south of the line.
as filed, and in English
ISP UA /OV ISP/TM 0245/FLDURD/TP A320/SK BCN007/RM FINAL RY24
- Report
- a routine report filed through ISP
- Where
- over ISP
- Time
- 02:45 UTC
- Height
- during the descent
- Aircraft
- A320
- Sky
- BCN007
- Remarks
- final runway 24
- GA6C at 1,100 ft, 25 nm south, 10:31 pm EDT (02:31 UTC): overcast above 1,100 ft, remarks: low-level wind shear + 5 knots runway 34. 164 nm along the route, 25 nm south of the line.
as filed, and in English
HPN UA /OV HPN/TM 0231/FL011/TP GA6C/SK OVC011/RM LLWS +/- 5 KNOTS RWY34
- Report
- a routine report filed through HPN
- Where
- over HPN
- Time
- 02:31 UTC
- Height
- at 1,100 ft
- Aircraft
- GA6C
- Sky
- overcast from 1,100 ft
- Remarks
- low-level wind shear + 5 knots runway 34
- E175 descending, 43 nm south, 10:19 pm EDT (02:19 UTC): remarks: cloud bases 70,000 ft ils runway 4. 173 nm along the route, 43 nm south of the line.
as filed, and in English
LGA UA /OV LGA/TM 0219/FLDURD/TP E175/RM CLOUD BASES 700 ILS RWY 4
- Report
- a routine report filed through LGA
- Where
- over LGA
- Time
- 02:19 UTC
- Height
- during the descent
- Aircraft
- E175
- Remarks
- cloud bases 70,000 ft ils runway 4
- GA6C descending, 5 nm west, 12:32 am EDT (04:32 UTC): overcast above 1,000 ft, remarks: bases OVC010. At the destination end, 5 nm west of the line.
as filed, and in English
SWF UA /OV SWF 270005/TM 0432/FLDURD/TP GA6C/SK OVC010/RM BASES OVC010
- Report
- a routine report filed through SWF
- Where
- 5 nm west (270°) of SWF
- Time
- 04:32 UTC
- Height
- during the descent
- Aircraft
- GA6C
- Sky
- overcast from 1,000 ft
- Remarks
- bases OVC010
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 3 forecast points nearest it (ACK, BDL, 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 | 250° at 13 kt | +12 kt | 108 kt | 1 h 42 min | 2:56 am EDT (06:56 UTC) | |
| 6,500 ft | 270° at 26 kt | +26 kt | 12 °C | 94 kt | 1 h 57 min | 3:11 am EDT (07:11 UTC) |
| 8,500 ft | 270° at 27 kt | +27 kt | 10 °C | 93 kt | 1 h 58 min | 3:12 am EDT (07:12 UTC) |
| 10,500 ft | 260° at 31 kt | +30 kt | 6 °C | 90 kt | 2 h 02 min | 3:16 am EDT (07:16 UTC) |
| 12,500 ft | 250° at 36 kt | +34 kt | 2 °C | 86 kt | 2 h 08 min | 3:22 am EDT (07:22 UTC) |
| 14,500 ft | 250° at 38 kt | +34 kt | -2 °C | 86 kt | 2 h 08 min | 3:22 am EDT (07:22 UTC) |
| 16,500 ft | 250° at 40 kt | +35 kt | -7 °C | 85 kt | 2 h 09 min | 3:23 am EDT (07:23 UTC) |
| 18,000 ft FL180 | 250° at 42 kt | +36 kt | -10 °C | 84 kt | 2 h 11 min | 3:25 am EDT (07:25 UTC) |
| 24,000 ft FL240 | 230° at 48 kt | +35 kt | -20 °C | 85 kt | 2 h 09 min | 3:23 am EDT (07:23 UTC) |
| 30,000 ft FL300 | 230° at 78 kt | +58 kt | -32 °C | 62 kt | 2 h 57 min | 4:11 am EDT (08:11 UTC) |
| 34,000 ft FL340 | 230° at 94 kt | +69 kt | -41 °C | 51 kt | 3 h 35 min | 4:49 am EDT (08:49 UTC) |
| 39,000 ft FL390 | 230° at 87 kt | +64 kt | -52 °C | 56 kt | 3 h 16 min | 4:30 am EDT (08:30 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ACK | used from 0 nm out; 24 nm from the line | 230/29 | 270/37 16° | 270/38 10° | 270/40 4° | 240/46 -8° | 230/52 -17° | 240/74 -31° | 240/83 -41° | 240/91 -53° |
| BDL | used from 48 nm out; 58 nm from the line | 120/24 | 290/23 12° | 280/21 8° | 250/36 3° | 250/41 -11° | 230/48 -21° | 230/78 -32° | 230/96 -41° | 230/86 -52° |
| JFK | used from 144 nm out; 51 nm from the line | 250/18 | 250/23 14° | 240/33 9° | 240/33 4° | 240/38 -10° | 240/45 -21° | 230/86 -32° | 230/102 -40° | 230/84 -51° |
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: a broken layer at 700 feet, overcast at 1,300 feet Weather: light rain, mist | from the east (080°) at 9 knots, gusting to 18 | 4 mi | 700 ft | 46 ft | 12:53 am EDT (04:53 UTC) |
| MVY Vineyard Haven, MA | 29 nm out, 7 nm northeast of the line, tower | IFR Sky: overcast at 600 feet Weather: light rain | from the east (080°) at 13 knots | 10+ mi | 600 ft | 66 ft | 04:53 UTC |
| GON Groton (New London), CT | 87 nm out, 5 nm southwest of the line, tower | IFR Sky: a broken layer at 900 feet, overcast at 1,200 feet Weather: light rain | from the north (360°) at 11 knots, gusting to 20 | 8 mi | 900 ft | 9 ft | 04:56 UTC |
| OXC Oxford, CT | 135 nm out, 5 nm west of the line, tower | IFR Sky: overcast at 600 feet | from the north-northeast (020°) at 11 knots, gusting to 18 | 10+ mi | 600 ft | 730 ft | 05:10 UTC |
| DXR Danbury, CT | 154 nm out, 6 nm south of the line, tower | marginal VFR Sky: overcast at 1,000 feet | from the north (010°) at 8 knots | 10+ mi | 1,000 ft | 456 ft | 05:10 UTC |
| SWF New York, NY | destination | marginal VFR Sky: scattered clouds at 700 feet, overcast at 1,200 feet Weather: mist | from the north-northeast (030°) at 7 knots | 6 mi | 1,200 ft | 490 ft | 12:45 am EDT (04:45 UTC) |
The highest airport on this list sits at 730 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SWF when you get there the forecast at the estimated arrival, 2:56 am EDT (06:56 UTC)
Wind from the northeast at 7 knots, visibility 5 miles, light rain showers, mist, a few clouds at 400 feet, a broken layer at 700 feet and more above IFR
The whole forecast for SWF
- From Sun 11:00 pm EDT (03:00 UTC): wind from the northeast at 7 knots, visibility 5 miles, light rain showers, mist, a few clouds at 400 feet, a broken layer at 700 feet and more above
- From Mon 7:00 am EDT (11:00 UTC): wind from the north-northeast at 5 knots, visibility more than 6 miles, a broken layer at 800 feet, overcast at 1,500 feet
- From Mon 9:00 am EDT (13:00 UTC): wind from the north-northeast at 6 knots, visibility more than 6 miles, a broken layer at 2,000 feet
- From Mon 12:00 pm EDT (16:00 UTC): wind from the north at 7 knots, visibility more than 6 miles, a few clouds at 2,000 feet, a broken layer at 5,000 feet
- From Mon 4:00 pm EDT (20:00 UTC): wind from the northwest at 6 knots, visibility more than 6 miles, scattered clouds at 5,000 feet
- From Mon 9:00 pm EDT (01:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 5,000 feet
The forecast for ACK, the departure
- From Sun 8:00 pm EDT (00:00 UTC): wind from the east at 11 knots, visibility more than 6 miles, light rain, a few clouds at 2,400 feet, scattered clouds at 3,500 feet and more above
- From Sun 10:00 pm EDT (02:00 UTC): wind from the east at 14 knots, gusting to 24, visibility 2 miles, rain, mist, overcast at 1,000 feet
- From Mon 1:00 am EDT (05:00 UTC): wind from the east at 16 knots, gusting to 23, visibility 3 miles, rain, mist, overcast at 300 feet
- From Mon 3:00 am EDT (07:00 UTC): wind from the east-northeast at 15 knots, visibility 1 mile, light rain showers, mist, overcast at 300 feet
- From Mon 5:00 am EDT (09:00 UTC): wind from the north-northeast at 15 knots, visibility ¾ mile, mist, overcast at 300 feet
- 30% chance between Mon 5:00 am EDT (09:00 UTC) and 6:00 am EDT (10:00 UTC): visibility ¾ mile, light rain showers, mist, overcast at 100 feet
- From Mon 11:00 am EDT (15:00 UTC): wind from the north-northeast at 15 knots, visibility more than 6 miles, a broken layer at 800 feet
- From Mon 4:00 pm EDT (20:00 UTC): wind from the north at 13 knots, gusting to 21, visibility more than 6 miles, scattered clouds at 3,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/7153 North Sicuate, RI, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 24 nm from the route, 67 nm along the route · drones kept away from a public gathering · until 12 October · ZBW
Daylight
Sunset at ACK 6:04 pm EDT (22:04 UTC), at SWF 6:20 pm EDT (22:20 UTC) (civil twilight ends 6:48 pm EDT (22:48 UTC)). At 120 knots the arrival at SWF is before sunrise there (7:04 am EDT (11:04 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
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, New York Stewart International.