Portland International Jetport to Patrick Leahy Burlington International PWM → BTV
132 nautical miles (152 statute miles) northwest on a straight line, true course 293°, about 308° magnetic at the departure end (variation 15W). At 120 knots that is 1 h 14 min at the quickest height in today's winds (10,500 ft, a 13-knot headwind), arriving about 5:20 am EDT (09:20 UTC), after sunset at the destination. Right now PWM is marginal VFR, wind from the northeast (040°) at 3 knots; BTV is marginal VFR, wind calm. 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, fog). Over the whole route.
- AIRMET ZULU 1C: moderate icing from 12,000 ft to 24,000 ft. Over the first 85 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the whole route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 104 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 PWM.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
No pilot reports within 50 nautical miles of the line in the last three hours.
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 (PWM, BML). 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 | 270° at 16 kt | +14 kt | 106 kt | 1 h 15 min | 5:21 am EDT (09:21 UTC) | |
| 6,500 ft | 280° at 17 kt | +17 kt | 7 °C | 103 kt | 1 h 17 min | 5:23 am EDT (09:23 UTC) |
| 8,500 ft | 260° at 17 kt | +14 kt | 5 °C | 106 kt | 1 h 15 min | 5:21 am EDT (09:21 UTC) |
| 10,500 ft | 250° at 17 kt | +13 kt | 2 °C | 107 kt | 1 h 14 min | 5:20 am EDT (09:20 UTC) |
| 12,500 ft | 250° at 17 kt | +13 kt | -1 °C | 107 kt | 1 h 14 min | 5:20 am EDT (09:20 UTC) |
| 14,500 ft | 250° at 20 kt | +15 kt | -5 °C | 105 kt | 1 h 15 min | 5:21 am EDT (09:21 UTC) |
| 16,500 ft | 250° at 23 kt | +17 kt | -8 °C | 103 kt | 1 h 17 min | 5:23 am EDT (09:23 UTC) |
| 18,000 ft FL180 | 250° at 26 kt | +18 kt | -10 °C | 102 kt | 1 h 18 min | 5:24 am EDT (09:24 UTC) |
| 24,000 ft FL240 | 240° at 51 kt | +28 kt | -21 °C | 92 kt | 1 h 26 min | 5:32 am EDT (09:32 UTC) |
| 30,000 ft FL300 | 240° at 63 kt | +35 kt | -35 °C | 85 kt | 1 h 33 min | 5:39 am EDT (09:39 UTC) |
| 34,000 ft FL340 | 240° at 81 kt | +49 kt | -44 °C | 71 kt | 1 h 52 min | 5:58 am EDT (09:58 UTC) |
| 39,000 ft FL390 | 240° at 87 kt | +53 kt | -53 °C | 67 kt | 1 h 58 min | 6:04 am EDT (10:04 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| PWM | used from 0 nm out; 24 nm from the line | 180/9 | 280/28 9° | 230/30 6° | 250/22 0° | 240/45 -9° | 230/63 -20° | 230/72 -34° | 240/87 -43° | 240/94 -54° |
| BML | used from 47 nm out; 40 nm from the line | 260/22 | 300/13 8° | 280/13 4° | 260/13 0° | 260/16 -11° | 240/45 -21° | 240/59 -36° | 240/77 -44° | 240/83 -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 |
|---|---|---|---|---|---|---|---|
| PWM Portland, ME | departure | marginal VFR Sky: a few clouds at 300 feet, overcast at 3,400 feet Weather: light rain, mist | from the northeast (040°) at 3 knots | 4 mi | 3,400 ft | 75 ft | 3:51 am EDT (07:51 UTC) |
| IZG Fryeburg, ME | 38 nm out, 9 nm northeast of the line | VFR Sky: scattered clouds at 600 feet, a broken layer at 4,200 feet, overcast at 7,000 feet Weather: light rain | calm | 10+ mi | 4,200 ft | 454 ft | 07:54 UTC |
| HIE Whitefield, NH | 66 nm out, 20 nm northeast of the line | marginal VFR Sky: a few clouds at 200 feet, overcast at 2,200 feet Weather: light rain | calm | 10+ mi | 2,200 ft | 1,072 ft | 07:52 UTC |
| MPV Barre/Montpelier, VT | 104 nm out, 6 nm south of the line | low IFR Sky: scattered clouds at 300 feet, overcast at 2,700 feet Weather: mist | from the east-southeast (120°) at 3 knots | 0.75 mi | 2,700 ft | 1,165 ft | 08:01 UTC |
| BTV Burlington, VT | destination | marginal VFR Sky: overcast at 2,400 feet | calm | 10+ mi | 2,400 ft | 334 ft | 3:54 am EDT (07:54 UTC) |
The highest airport on this list sits at 1,165 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BTV when you get there the forecast at the estimated arrival, 5:20 am EDT (09:20 UTC)
Wind calm, visibility 6 miles, mist, overcast at 1,400 feet marginal VFR
The whole forecast for BTV
- From Mon 2:00 am EDT (06:00 UTC): wind from the south at 5 knots, visibility 6 miles, light rain, mist, overcast at 3,500 feet
- From Mon 5:00 am EDT (09:00 UTC): wind calm, visibility 6 miles, mist, overcast at 1,400 feet
- From Mon 9:00 am EDT (13:00 UTC): wind calm, visibility more than 6 miles, a broken layer at 2,100 feet
- From Mon 1:00 pm EDT (17:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 5,000 feet
- From Mon 5:00 pm EDT (21:00 UTC): wind from the north at 6 knots, visibility 6 miles, mist, overcast at 1,900 feet
The forecast for PWM, the departure
- From Mon 2:00 am EDT (06:00 UTC): wind from the north-northeast at 3 knots, visibility 4 miles, light rain, overcast at 2,500 feet
- From Mon 7:00 am EDT (11:00 UTC): wind from the west-northwest at 3 knots, visibility 6 miles, mist, overcast at 1,500 feet
- From Mon 10:30 am EDT (14:30 UTC): wind from the west-northwest at 7 knots, visibility more than 6 miles, a few clouds at 25,000 feet
- From Mon 10:00 pm EDT (02:00 UTC): wind from the north-northeast at 12 knots, gusting to 22, visibility 6 miles, mist, a broken layer at 2,500 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 PWM 6:03 pm EDT (22:03 UTC), at BTV 6:13 pm EDT (22:13 UTC) (civil twilight ends 6:43 pm EDT (22:43 UTC)). At 120 knots the arrival at BTV is before sunrise there (7:03 am EDT (11:03 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: Portland International Jetport, Patrick Leahy Burlington International.