Long Island Mac Arthur Airport to Nantucket Memorial ISP → ACK
140 nautical miles (162 statute miles) east on a straight line, true course 078°, about 092° magnetic at the departure end (variation 14W). At 120 knots that is 42 min at the quickest height in today's winds (34,000 ft, a 82-knot tailwind), arriving about 2:24 am EDT (06:24 UTC), after sunset at the destination. 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
- 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). Over the first 28 nm of 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.
- 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 last 66 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.
- 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 21,000 ft to 33,000 ft. Over the first 47 nm of the route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 10,000 ft. Over the last 103 nm of the 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 last 56 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 ISP.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
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 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 (JFK, ACK). 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 | 240° at 26 kt | −24 kt | 144 kt | 58 min | 2:40 am EDT (06:40 UTC) | |
| 5,500 ft | 260° at 30 kt | −30 kt | 150 kt | 56 min | 2:38 am EDT (06:38 UTC) | |
| 7,500 ft | 260° at 34 kt | −34 kt | 13 °C | 154 kt | 55 min | 2:37 am EDT (06:37 UTC) |
| 9,500 ft | 260° at 36 kt | −36 kt | 9 °C | 156 kt | 54 min | 2:36 am EDT (06:36 UTC) |
| 11,500 ft | 260° at 36 kt | −36 kt | 5 °C | 156 kt | 54 min | 2:36 am EDT (06:36 UTC) |
| 13,500 ft | 260° at 38 kt | −38 kt | 1 °C | 158 kt | 53 min | 2:35 am EDT (06:35 UTC) |
| 15,500 ft | 250° at 40 kt | −39 kt | -3 °C | 159 kt | 53 min | 2:35 am EDT (06:35 UTC) |
| 17,500 ft | 240° at 43 kt | −41 kt | -8 °C | 161 kt | 52 min | 2:34 am EDT (06:34 UTC) |
| 18,000 ft FL180 | 240° at 43 kt | −41 kt | -9 °C | 161 kt | 52 min | 2:34 am EDT (06:34 UTC) |
| 24,000 ft FL240 | 230° at 50 kt | −45 kt | -18 °C | 165 kt | 51 min | 2:33 am EDT (06:33 UTC) |
| 30,000 ft FL300 | 240° at 78 kt | −72 kt | -31 °C | 192 kt | 44 min | 2:26 am EDT (06:26 UTC) |
| 34,000 ft FL340 | 240° at 89 kt | −82 kt | -41 °C | 202 kt | 42 min | 2:24 am EDT (06:24 UTC) |
| 39,000 ft FL390 | 240° at 88 kt | −82 kt | -52 °C | 202 kt | 42 min | 2:24 am EDT (06:24 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| JFK | used from 0 nm out; 56 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° |
| ACK | used from 47 nm out; 70 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° |
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 |
|---|---|---|---|---|---|---|---|
| ISP New York, NY | departure | no report just now | 98 ft | ||||
| FOK Westhampton Beach, NY | 19 nm out, 3 nm east of the line, tower | no report just now | 66 ft | ||||
| GON Groton (New London), CT | 56 nm out, 22 nm north of the line, tower | no report just now | 9 ft | ||||
| MVY Vineyard Haven, MA | 122 nm out, 14 nm northwest of the line, tower | no report just now | 66 ft | ||||
| ACK Nantucket, MA | destination | no report just now | 46 ft |
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 ACK when you get there the forecast at the estimated arrival, 2:24 am EDT (06:24 UTC)
ACK has no terminal forecast; use the nearest airport that does.
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 ISP 6:17 pm EDT (22:17 UTC), at ACK 6:04 pm EDT (22:04 UTC) (civil twilight ends 6:32 pm EDT (22:32 UTC)). At 120 knots the arrival at ACK is before sunrise there (6:48 am EDT (10:48 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: Long Island Mac Arthur Airport, Nantucket Memorial.