Plan a flight · Sun 10:00 pm EDT (02:00 UTC)

Nantucket Memorial to Hancock County/Bar Harbor ACK → BHB

206 nautical miles (237 statute miles) north on a straight line, true course 021°, about 035° magnetic at the departure end (variation 14W). At 120 knots that is 1 h 08 min at the quickest height in today's winds (39,000 ft, a 63-knot tailwind), arriving about 11:08 pm EDT (03:08 UTC), after sunset at the destination. Right now ACK is marginal VFR, wind from the east (100°) at 15 knots; BHB is VFR, wind from the south-southwest (210°) 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: 4 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 first 88 nm of the route.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 13,000 ft. Over the whole route.
AIRMET ZULU 1C: moderate icing up to 22,000 ft. Over the last 167 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 167 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

BCS3 at 18,000 ft, 47 nm west, 8:17 pm EDT (00:17 UTC): moderate chop turbulence, remarks: moderate CHOP180-210 smooth above 22,000 ft. 10 nm along the route, 47 nm west of the line.
as filed, and in English
```
EWB UA /OV EWB/TM 0017/FL180/TP BCS3/TB MOD CHOP/RM MOD CHOP180-210 SMOOTH ABOVE FL220
```
Report
a routine report filed through EWB
Where
over EWB
Time
00:17 UTC
Height
at 18,000 ft
Aircraft
BCS3
Turbulence
moderate chop
Remarks
moderate CHOP180-210 smooth above 22,000 ft
A321 at 5,000 ft, 44 nm west, 8:46 pm EDT (00:46 UTC): moderate turbulence from 5,000 ft to 15,000 ft. 39 nm along the route, 44 nm west of the line.
as filed, and in English
```
BOS UA /OV BOS150020/TM 0046/FL050/TP A321/TB MOD 150-050
```
Report
a routine report filed through BOS
Where
20 nm southeast (150°) of BOS
Time
00:46 UTC
Height
at 5,000 ft
Aircraft
A321
Turbulence
moderate from 15,000 ft to 5,000 ft
B764 at 35,000 ft, 33 nm south, 7:18 pm EDT (23:18 UTC): light to moderate turbulence. At the departure end, 33 nm south of the line.
as filed, and in English
```
ACK UA /OV ACK200035/TM 2318/FL350/TP B764/TB LGT OCNL MOD
```
Report
a routine report filed through ACK
Where
35 nm south (200°) of ACK
Time
23:18 UTC
Height
at 35,000 ft
Aircraft
B764
Turbulence
light occasional moderate
E75S at 12,000 ft, 47 nm west, 8:59 pm EDT (00:59 UTC): light turbulence, remarks: during the climb from 12,000 ft to 17,000 ft smooth above 18,000 ft. 10 nm along the route, 47 nm west of the line.
as filed, and in English
```
EWB UA /OV EWB/TM 0059/FL120/TP E75S/TB LGT MOD/RM DURC 120-170 SMOOTH ABOVE 180
```
Report
a routine report filed through EWB
Where
over EWB
Time
00:59 UTC
Height
at 12,000 ft
Aircraft
E75S
Turbulence
light moderate
Remarks
during the climb from 12,000 ft to 17,000 ft smooth above 18,000 ft
BE40 at 16,000 ft, 19 nm west, 7:02 pm EDT (23:02 UTC): light to moderate chop turbulence. 10 nm along the route, 19 nm west of the line.
as filed, and in English
```
MVY UA /OV MVY090010/TM 2302/FL160/TP BE40/TB LGT OCNL MOD CHOP
```
Report
a routine report filed through MVY
Where
10 nm east (090°) of MVY
Time
23:02 UTC
Height
at 16,000 ft
Aircraft
BE40
Turbulence
light occasional moderate chop
BC3 at 20,000 ft, 42 nm west, 7:51 pm EDT (23:51 UTC): light chop turbulence, remarks: during the climb from 14,000 ft to 20,000 ft ssoxs sid. 29 nm along the route, 42 nm west of the line.
as filed, and in English
```
PYM UA /OV PYM/TM 2351/FL200/TP BC3/TB LGT CHOP/RM DURC 140-200 SSOXS SID
```
Report
a routine report filed through PYM
Where
over PYM
Time
23:51 UTC
Height
at 20,000 ft
Aircraft
BC3
Turbulence
light chop
Remarks
during the climb from 14,000 ft to 20,000 ft ssoxs sid

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 4 forecast points nearest it (ACK, BOS, PWM, BGR). 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	190° at 20 kt	−20 kt		140 kt	1 h 28 min	11:28 pm EDT (03:28 UTC)
5,500 ft	190° at 22 kt	−22 kt		142 kt	1 h 27 min	11:27 pm EDT (03:27 UTC)
7,500 ft	220° at 20 kt	−20 kt	7 °C	140 kt	1 h 28 min	11:28 pm EDT (03:28 UTC)
9,500 ft	240° at 22 kt	−17 kt	5 °C	137 kt	1 h 30 min	11:30 pm EDT (03:30 UTC)
11,500 ft	240° at 24 kt	−18 kt	2 °C	138 kt	1 h 30 min	11:30 pm EDT (03:30 UTC)
13,500 ft	250° at 28 kt	−20 kt	-2 °C	140 kt	1 h 28 min	11:28 pm EDT (03:28 UTC)
15,500 ft	250° at 33 kt	−22 kt	-5 °C	142 kt	1 h 27 min	11:27 pm EDT (03:27 UTC)
17,500 ft	250° at 37 kt	−24 kt	-8 °C	144 kt	1 h 26 min	11:26 pm EDT (03:26 UTC)
18,000 ft FL180	250° at 39 kt	−24 kt	-9 °C	144 kt	1 h 26 min	11:26 pm EDT (03:26 UTC)
24,000 ft FL240	250° at 51 kt	−32 kt	-18 °C	152 kt	1 h 21 min	11:21 pm EDT (03:21 UTC)
30,000 ft FL300	250° at 66 kt	−45 kt	-33 °C	165 kt	1 h 15 min	11:15 pm EDT (03:15 UTC)
34,000 ft FL340	250° at 78 kt	−48 kt	-43 °C	168 kt	1 h 14 min	11:14 pm EDT (03:14 UTC)
39,000 ft FL390	250° at 103 kt	−63 kt	-55 °C	183 kt	1 h 08 min	11:08 pm EDT (03:08 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
ACK	used from 0 nm out; 25 nm from the line	150/19	170/30 8°	210/31 9°	230/42 3°	250/44 -7°	250/50 -17°	240/62 -32°	250/71 -42°	250/86 -55°
BOS	used from 49 nm out; 68 nm from the line	160/27	190/23 9°	260/20 7°	260/32 1°	250/48 -7°	240/56 -17°	240/59 -33°	250/75 -43°	250/94 -55°
PWM	used from 98 nm out; 61 nm from the line	200/23	190/21 5°	260/23 5°	270/20 0°	250/29 -9°	250/54 -19°	250/71 -33°	250/78 -43°	250/105 -56°
BGR	used from 147 nm out; 54 nm from the line	240/29	230/23 10°	230/18 4°	210/13 -1°	260/35 -11°	270/49 -20°	260/74 -35°	260/88 -45°	260/123 -55°

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	marginal VFR Sky: a broken layer at 2,600 feet, overcast at 3,500 feet Weather: light rain	from the east (100°) at 15 knots	9 mi	2,600 ft	46 ft	9:53 pm EDT (01:53 UTC)
HYA Hyannis, MA	20 nm out, 18 nm west of the line, tower	marginal VFR Sky: scattered clouds at 600 feet, a broken layer at 1,300 feet, overcast at 2,300 feet Weather: heavy rain, mist	from the east (090°) at 8 knots	3 mi	1,300 ft	54 ft	01:56 UTC
RKD Rockland, ME	177 nm out, 21 nm west of the line	VFR Sky: scattered clouds at 12,000 feet Weather: light rain	from the southwest (230°) at 7 knots	10+ mi	none	55 ft	01:56 UTC
BHB Bar Harbor, ME	destination	VFR	from the south-southwest (210°) at 7 knots	10+ mi	none	83 ft	9:56 pm EDT (01:56 UTC)

The highest airport on this list sits at 83 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At BHB when you get there the forecast at the estimated arrival, 11:08 pm EDT (03:08 UTC)

Wind from the south-southwest at 9 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for BHB

From Sun 8:00 pm EDT (00:00 UTC): wind from the south-southwest at 9 knots, visibility more than 6 miles, clear skies
From Mon 3:00 am EDT (07:00 UTC): wind from the south-southwest at 5 knots, visibility more than 6 miles, overcast at 600 feet
From Mon 11:00 am EDT (15:00 UTC): wind from the west-southwest at 5 knots, visibility more than 6 miles, scattered clouds at 1,800 feet
From Mon 4:00 pm EDT (20:00 UTC): wind from the north-northwest at 6 knots, visibility more than 6 miles, a broken layer at 2,400 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

No temporary flight restriction on or near this route right now.

Daylight

Sunset at ACK 6:04 pm EDT (22:04 UTC), at BHB 5:54 pm EDT (21:54 UTC) (civil twilight ends 6:23 pm EDT (22:23 UTC)). At 120 knots the arrival at BHB is before sunrise there (6:44 am EDT (10:44 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, Hancock County/Bar Harbor.