Plan a flight · Sun 11:05 pm EDT (03:05 UTC)

Nantucket Memorial to Portsmouth International AT Pease ACK → PSM

115 nautical miles (132 statute miles) north on a straight line, true course 343°, about 357° magnetic at the departure end (variation 14W). At 120 knots that is 48 min at the quickest height in today's winds (30,000 ft, a 24-knot tailwind), arriving about 11:53 pm EDT (03:53 UTC), after sunset at the destination. Right now ACK is IFR, wind from the east (090°) at 15 knots, gusting to 24; PSM is IFR, wind from the northeast (050°) at 3 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: 5 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 21,000 ft to 33,000 ft. Over the whole 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 25,000 ft. Over the last 67 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, 31 nm west, 8:17 pm EDT (00:17 UTC): moderate chop turbulence, remarks: moderate CHOP180-210 smooth above 22,000 ft. 38 nm along the route, 31 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, 11 nm west, 8:46 pm EDT (00:46 UTC): moderate turbulence from 5,000 ft to 15,000 ft. 57 nm along the route, 11 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
BCS3 at 12,000 ft, 27 nm west, 8:11 pm EDT (00:11 UTC): moderate turbulence, rain, remarks: ssoxs dept from 12,000 ft to 16,000 ft. 57 nm along the route, 27 nm west of the line.
as filed, and in English
```
BOS UA /OV BOS200020/TM 0011/FL120/TP BCS3/WX RA+/TB MOD/RM SSOXS DEPT 120-160
```
Report
a routine report filed through BOS
Where
20 nm south (200°) of BOS
Time
00:11 UTC
Height
at 12,000 ft
Aircraft
BCS3
Weather
ra+
Turbulence
moderate
Remarks
ssoxs dept from 12,000 ft to 16,000 ft
A333 at 15,000 ft, 0 nm south, 9:37 pm EDT (01:37 UTC): moderate chop turbulence up to 15,000 ft, remarks: during the climb. At the destination end, 0 nm south of the line.
as filed, and in English
```
PSM UA /OV PSM/TM 0137/FL150/TP A333/TB MOD CHOP BLO 150/RM DURC
```
Report
a routine report filed through PSM
Where
over PSM
Time
01:37 UTC
Height
at 15,000 ft
Aircraft
A333
Turbulence
moderate chop below 15,000 ft
Remarks
during the climb
E75S at 12,000 ft, 31 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. 38 nm along the route, 31 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
BCS3 at 600 ft, 19 nm west, 9:20 pm EDT (01:20 UTC): a broken layer above 600 ft, remarks: during the descent runway 22L bos. 76 nm along the route, 19 nm west of the line.
as filed, and in English
```
BOS UA /OV KBOS040002/TM 0120/FL006/TP BCS3/SK BKN006/RM DURD RY 22L BOS
```
Report
a routine report filed through BOS
Where
2 nm northeast (040°) of KBOS
Time
01:20 UTC
Height
at 600 ft
Aircraft
BCS3
Sky
a broken layer from 600 ft
Remarks
during the descent runway 22L bos
A321 , 21 nm west, 8:56 pm EDT (00:56 UTC): remarks: braking action fair during landing runway 22L bos. 76 nm along the route, 21 nm west of the line.
as filed, and in English
```
BOS UA /OV KBOS/TM 0056/FL000/TP A321/RM BRAKING ACTION FAIR DURING LANDING RY 22L BOS
```
Report
a routine report filed through BOS
Where
over KBOS
Time
00:56 UTC
Height
at 0 ft
Aircraft
A321
Remarks
braking action fair during landing runway 22L bos
UAL42 at 35,000 ft, 13 nm southwest, 10:02 pm EDT (02:02 UTC): light turbulence, -45 °C, wind 256° at 85 knots. 86 nm along the route, 13 nm southwest of the line.
as filed, and in English
```
ARP UAL42 4232N 07054W 0202 F350 MS45 256/085KT TB LIGHT SK ON TOP IC NONE
```
Report
a routine report filed through ARP
E55P at 600 ft, 31 nm west, 8:48 pm EDT (00:48 UTC): overcast above 600 ft. 86 nm along the route, 31 nm west of the line.
as filed, and in English
```
BED UA /OV BED/TM 0048/FL006/TP E55P/SK OVC006
```
Report
a routine report filed through BED
Where
over BED
Time
00:48 UTC
Height
at 600 ft
Aircraft
E55P
Sky
overcast from 600 ft
B38M descending, 28 nm west, 10:53 pm EDT (02:53 UTC): overcast above 1,500 ft; scattered clouds above 500 ft. At the destination end, 28 nm west of the line.
as filed, and in English
```
MHT UA /OV RWY 17/TM 0253/FLDURD/TP B38M/SK 015 OVC / 005 SCT
```
Report
a routine report filed through MHT
Where
runway 17
Time
02:53 UTC
Height
during the descent
Aircraft
B38M
Sky
at 1,500 ft overcast; at 500 ft scattered
B38M descending, 28 nm west, 10:14 pm EDT (02:14 UTC): remarks: mod-hvy precip. At the destination end, 28 nm west of the line.
as filed, and in English
```
MHT UA /OV RWY 17/TM 0214/FLDURD/TP B38M/SK 015/RM MOD-HVY PRECIP
```
Report
a routine report filed through MHT
Where
runway 17
Time
02:14 UTC
Height
during the descent
Aircraft
B38M
Sky
at 1,500 ft
Remarks
mod-hvy precip

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 2 forecast points nearest it (ACK, BOS). 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	220° at 16 kt	−10 kt		130 kt	53 min	11:58 pm EDT (03:58 UTC)
6,500 ft	240° at 25 kt	−4 kt	13 °C	124 kt	56 min	12:01 am EDT (04:01 UTC)
8,500 ft	270° at 28 kt	+8 kt	10 °C	112 kt	1 h 02 min	12:07 am EDT (04:07 UTC)
10,500 ft	270° at 31 kt	+9 kt	6 °C	111 kt	1 h 02 min	12:07 am EDT (04:07 UTC)
12,500 ft	260° at 34 kt	+6 kt	2 °C	114 kt	1 h 01 min	12:06 am EDT (04:06 UTC)
14,500 ft	260° at 38 kt	+2 kt	-2 °C	118 kt	58 min	12:03 am EDT (04:03 UTC)
16,500 ft	250° at 43 kt	−2 kt	-6 °C	122 kt	57 min	12:02 am EDT (04:02 UTC)
18,000 ft FL180	250° at 46 kt	−6 kt	-9 °C	126 kt	55 min	12:00 am EDT (04:00 UTC)
24,000 ft FL240	230° at 56 kt	−22 kt	-18 °C	142 kt	49 min	11:54 pm EDT (03:54 UTC)
30,000 ft FL300	230° at 74 kt	−24 kt	-32 °C	144 kt	48 min	11:53 pm EDT (03:53 UTC)
34,000 ft FL340	240° at 90 kt	−20 kt	-41 °C	140 kt	49 min	11:54 pm EDT (03:54 UTC)
39,000 ft FL390	240° at 94 kt	−21 kt	-53 °C	141 kt	49 min	11:54 pm EDT (03:54 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°
BOS	used from 48 nm out; 21 nm from the line	110/20	200/26 12°	280/24 8°	260/29 3°	250/47 -10°	230/59 -19°	230/74 -33°	240/95 -41°	240/96 -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 1,400 feet Weather: heavy rain, mist	from the east (090°) at 15 knots, gusting to 24	2.5 mi	1,400 ft	46 ft	10:53 pm EDT (02:53 UTC)
HYA Hyannis, MA	29 nm out, 3 nm southwest of the line, tower	IFR Sky: scattered clouds at 800 feet, a broken layer at 2,300 feet, overcast at 2,800 feet Weather: rain, mist	from the east (100°) at 10 knots, gusting to 18	2.5 mi	2,300 ft	54 ft	02:56 UTC
BVY Beverly, MA	86 nm out, 13 nm west of the line, tower	IFR Sky: overcast at 500 feet Weather: heavy rain, mist	from the northeast (040°) at 4 knots	2.5 mi	500 ft	107 ft	02:53 UTC
PSM Portsmouth, NH	destination	IFR Sky: overcast at 900 feet Weather: rain, mist	from the northeast (050°) at 3 knots	2 mi	900 ft	100 ft	10:13 pm EDT (02:13 UTC)

The highest airport on this list sits at 107 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At PSM when you get there the forecast at the estimated arrival, 11:53 pm EDT (03:53 UTC)

Wind light and variable, visibility 5 miles, light rain, mist, overcast at 900 feet IFR

The whole forecast for PSM

From Sun 8:00 pm EDT (00:00 UTC): wind calm, visibility more than 6 miles, light rain, a broken layer at 9,000 feet, overcast at 20,000 feet
From Sun 10:00 pm EDT (02:00 UTC): wind light and variable, visibility 5 miles, light rain, mist, overcast at 900 feet
From Mon 12:00 am EDT (04:00 UTC): wind light and variable, visibility 3 miles, light rain, overcast at 500 feet
From Mon 9:00 am EDT (13:00 UTC): wind from the northwest at 6 knots, visibility more than 6 miles, a broken layer at 2,500 feet, overcast at 6,000 feet
From Mon 12:00 pm EDT (16:00 UTC): wind from the west-northwest at 5 knots, visibility more than 6 miles, a broken layer at 25,000 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

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

Daylight

Sunset at ACK 6:04 pm EDT (22:04 UTC), at PSM 6:05 pm EDT (22:05 UTC) (civil twilight ends 6:34 pm EDT (22:34 UTC)). At 120 knots the arrival at PSM is before sunrise there (6:52 am EDT (10:52 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, Portsmouth International AT Pease.