Miami-Opa Locka Executive to Nantucket Memorial OPF → ACK
1,052 nautical miles (1,210 statute miles) northeast on a straight line, true course 026°, about 032° magnetic at the departure end (variation 6W). At 120 knots that is 5 h 38 min at the quickest height in today's winds (34,000 ft, a 67-knot tailwind), arriving about 9:38 am EDT (13:38 UTC). Right now OPF is VFR, wind from the northwest (310°) at 3 knots; ACK is low IFR, wind from the north-northeast (020°) at 14 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
- AIRMET TANGO 1W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 556 to 675 nm out.
- 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 last 248 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 119 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 30 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 OPF.
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 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 8 forecast points nearest it (MIA, MLB, CHS, ILM, ORF, ACY, 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 | 250° at 17 kt | −13 kt | 133 kt | 7 h 55 min | 11:55 am EDT (15:55 UTC) | |
| 5,500 ft | 250° at 19 kt | −15 kt | 135 kt | 7 h 48 min | 11:48 am EDT (15:48 UTC) | |
| 7,500 ft | 250° at 23 kt | −18 kt | 12 °C | 138 kt | 7 h 37 min | 11:37 am EDT (15:37 UTC) |
| 9,500 ft | 240° at 26 kt | −22 kt | 10 °C | 142 kt | 7 h 25 min | 11:25 am EDT (15:25 UTC) |
| 11,500 ft | 240° at 28 kt | −24 kt | 7 °C | 144 kt | 7 h 18 min | 11:18 am EDT (15:18 UTC) |
| 13,500 ft | 240° at 30 kt | −26 kt | 3 °C | 146 kt | 7 h 12 min | 11:12 am EDT (15:12 UTC) |
| 15,500 ft | 240° at 33 kt | −29 kt | -1 °C | 149 kt | 7 h 04 min | 11:04 am EDT (15:04 UTC) |
| 17,500 ft | 240° at 35 kt | −31 kt | -5 °C | 151 kt | 6 h 58 min | 10:58 am EDT (14:58 UTC) |
| 18,000 ft FL180 | 240° at 36 kt | −32 kt | -6 °C | 152 kt | 6 h 55 min | 10:55 am EDT (14:55 UTC) |
| 24,000 ft FL240 | 240° at 45 kt | −39 kt | -17 °C | 159 kt | 6 h 37 min | 10:37 am EDT (14:37 UTC) |
| 30,000 ft FL300 | 220° at 60 kt | −58 kt | -31 °C | 178 kt | 5 h 55 min | 9:55 am EDT (13:55 UTC) |
| 34,000 ft FL340 | 220° at 68 kt | −67 kt | -40 °C | 187 kt | 5 h 38 min | 9:38 am EDT (13:38 UTC) |
| 39,000 ft FL390 | 230° at 63 kt | −60 kt | -51 °C | 180 kt | 5 h 51 min | 9:51 am EDT (13:51 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| MIA | used from 0 nm out; 31 nm from the line | 150/7 | 140/5 17° | 160/5 14° | L/V 9° | 230/8 -5° | 230/8 -17° | 150/11 -32° | 150/25 -41° | 180/29 -51° |
| MLB | used from 99 nm out; 77 nm from the line | 230/6 | 230/12 17° | 240/13 12° | 240/14 7° | 240/20 -5° | 240/24 -16° | 210/21 -32° | 190/33 -41° | 200/36 -52° |
| CHS | used from 298 nm out; 185 nm from the line | 280/21 | 270/23 12° | 280/28 11° | 260/35 6° | 250/41 -5° | 250/45 -16° | 230/59 -32° | 220/74 -40° | 230/67 -52° |
| ILM | used from 397 nm out; 143 nm from the line | 270/22 | 270/23 11° | 260/35 10° | 240/41 6° | 240/49 -5° | 240/61 -16° | 230/74 -30° | 220/79 -40° | 230/71 -51° |
| ORF | used from 595 nm out; 132 nm from the line | 250/24 | 230/32 11° | 220/37 10° | 220/37 6° | 230/47 -5° | 230/62 -17° | 220/89 -30° | 220/93 -40° | 230/77 -51° |
| ACY | used from 794 nm out; 128 nm from the line | 220/19 | 220/18 14° | 210/36 9° | 210/35 5° | 220/36 -8° | 240/49 -21° | 220/90 -31° | 230/103 -40° | 230/81 -50° |
| JFK | used from 893 nm out; 127 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 943 nm out; 84 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 |
|---|---|---|---|---|---|---|---|
| OPF Miami, FL | departure | VFR | from the northwest (310°) at 3 knots | 10+ mi | none | 8 ft | 3:53 am EDT (07:53 UTC) |
| FXE Fort Lauderdale, FL | 20 nm out, 3 nm west of the line, tower | VFR | from the north-northwest (340°) at 3 knots | 10+ mi | none | 13 ft | 07:53 UTC |
| ACK Nantucket, MA | destination | low IFR Sky: overcast at 200 feet Weather: mist | from the north-northeast (020°) at 14 knots | 2.5 mi | 200 ft | 46 ft | 3:53 am EDT (07:53 UTC) |
The highest airport on this list sits at 46 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, 9:38 am EDT (13:38 UTC)
Wind from the north-northeast at 13 knots, gusting to 18, visibility 2 miles, mist, overcast at 300 feet low IFR
The whole forecast for ACK
- From Mon 2:00 am EDT (06:00 UTC): wind from the east at 16 knots, gusting to 23, visibility 3 miles, rain, mist, overcast at 300 feet
- From Mon 5:00 am EDT (09:00 UTC): wind from the north-northeast at 13 knots, gusting to 18, visibility 2 miles, mist, overcast at 300 feet
- From Mon 11:00 am EDT (15:00 UTC): wind from the north-northeast at 15 knots, gusting to 22, 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, visibility more than 6 miles, scattered clouds at 5,000 feet
- From Mon 8:00 pm EDT (00:00 UTC): wind from the north at 3 knots, visibility more than 6 miles, scattered clouds at 5,000 feet
The forecast for OPF, the departure
- From Mon 2:00 am EDT (06:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 2,500 feet
- From Mon 9:00 am EDT (13:00 UTC): wind from the north-northwest at 6 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, scattered clouds at 5,000 feet
- From Mon 12:00 pm EDT (16:00 UTC): wind from the northeast at 10 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,500 feet
- From Mon 8:00 pm EDT (00:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 2,500 feet
Temporary flight restrictions on the line or within 25 nm of it
- 5/2809 Palm Beach, FL, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local 8 nm from the route, 50 nm along the route · security · until 20 October · ZMA
Daylight
Sunset at OPF 6:56 pm EDT (22:56 UTC), at ACK 6:04 pm EDT (22:04 UTC) (civil twilight ends 6:32 pm EDT (22:32 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: Miami-Opa Locka Executive, Nantucket Memorial.