Merrill Field to Juneau International MRI → JNU
491 nautical miles (565 statute miles) east on a straight line, true course 104°, about 091° magnetic at the departure end (variation 13E). At 120 knots that is 3 h 01 min at the quickest height in today's winds (34,000 ft, a 43-knot tailwind), arriving about 12:50 am AKDT (08:50 UTC), after sunset at the destination. Right now MRI is VFR, wind calm; JNU is marginal VFR, wind from the east-southeast (120°) at 14 knots, gusting to 24. 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
No SIGMET or AIRMET covers any part of this route right now.
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 MRI.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent B737 descending, 0 nm southwest, 7:53 pm AKDT (03:53 UTC): remarks: during the descent runway 8 low-level wind shear a 10-knot loss of airspeed jnut akfss. At the destination end, 0 nm southwest of the line.
as filed, and in English
JNU UUA /OV JNU /TM 0353 /FLUNKN /TP B737 /RM DURD RY8 LLWS +/-10KTS JNUT AKFSS
- Report
- an urgent report filed through JNU
- Where
- over JNU
- Time
- 03:53 UTC
- Height
- height not given
- Aircraft
- B737
- Remarks
- during the descent runway 8 low-level wind shear a 10-knot loss of airspeed jnut akfss
- B77L at 8,000 ft, 19 nm west, 9:30 pm AKDT (05:30 UTC): no turbulence, no icing, remarks: during the climb. At the departure end, 19 nm west of the line.
as filed, and in English
ANC UA /OV TED250015/TM 0530/FL080/TP B77L/SK TOPS 050/TB NEG/IC NEG/RM DURC
- Report
- a routine report filed through ANC
- Where
- 15 nm west (250°) of TED
- Time
- 05:30 UTC
- Height
- at 8,000 ft
- Aircraft
- B77L
- Sky
- tops 5,000 ft
- Turbulence
- none
- Icing
- none
- Remarks
- during the climb
- B737 at 5,000 ft, 12 nm southwest, 8:41 pm AKDT (04:41 UTC): light rime icing above 8,000 ft, -11 °C, remarks: during the descent. At the departure end, 12 nm southwest of the line.
as filed, and in English
ANC UA /OV TED230008/TM 0441/FL050/TP B737/TA M11/IC LGT RIME AT 080/RM DURD
- Report
- a routine report filed through ANC
- Where
- 8 nm southwest (230°) of TED
- Time
- 04:41 UTC
- Height
- at 5,000 ft
- Aircraft
- B737
- Temperature
- −11 °C
- Icing
- light rime at at 8,000 ft
- Remarks
- during the descent
- A21N at 3,900 ft, 6 nm west, 8:31 pm AKDT (04:31 UTC): light rain, remarks: during the climb. At the departure end, 6 nm west of the line.
as filed, and in English
ANC UA /OV TED320005/TM 0431/FL039/TP A21N/SK BASES 025/WX -RA/RM DURC
- Report
- a routine report filed through ANC
- Where
- 5 nm northwest (320°) of TED
- Time
- 04:31 UTC
- Height
- at 3,900 ft
- Aircraft
- A21N
- Sky
- bases 2,500 ft
- Weather
- light rain
- Remarks
- during the climb
- B737 descending, 0 nm southwest, 8:53 pm AKDT (04:53 UTC): light chop turbulence, remarks: during the descent runway 8 akfss. At the destination end, 0 nm southwest of the line.
as filed, and in English
JNU UA /OV JNU /TM 0453 /FLUNKN /TP B737 /TB LGT CHOP /RM DURD RY8 AKFSS
- Report
- a routine report filed through JNU
- Where
- over JNU
- Time
- 04:53 UTC
- Height
- height not given
- Aircraft
- B737
- Turbulence
- light chop
- Remarks
- during the descent runway 8 akfss
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 4 forecast points nearest it (ANC, MDO, YAK, JNU). 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 | 210° at 11 kt | −2 kt | 122 kt | 4 h 01 min | 1:50 am AKDT (09:50 UTC) | |
| 5,500 ft | 230° at 15 kt | −8 kt | 128 kt | 3 h 50 min | 1:39 am AKDT (09:39 UTC) | |
| 7,500 ft | 240° at 18 kt | −10 kt | -7 °C | 130 kt | 3 h 47 min | 1:36 am AKDT (09:36 UTC) |
| 9,500 ft | 240° at 19 kt | −11 kt | -11 °C | 131 kt | 3 h 45 min | 1:34 am AKDT (09:34 UTC) |
| 11,500 ft | 240° at 22 kt | −13 kt | -16 °C | 133 kt | 3 h 42 min | 1:31 am AKDT (09:31 UTC) |
| 13,500 ft | 240° at 26 kt | −15 kt | -19 °C | 135 kt | 3 h 38 min | 1:27 am AKDT (09:27 UTC) |
| 15,500 ft | 240° at 30 kt | −18 kt | -23 °C | 138 kt | 3 h 33 min | 1:22 am AKDT (09:22 UTC) |
| 17,500 ft | 240° at 35 kt | −21 kt | -26 °C | 141 kt | 3 h 29 min | 1:18 am AKDT (09:18 UTC) |
| 18,000 ft FL180 | 240° at 36 kt | −22 kt | -27 °C | 142 kt | 3 h 27 min | 1:16 am AKDT (09:16 UTC) |
| 24,000 ft FL240 | 240° at 46 kt | −28 kt | -37 °C | 148 kt | 3 h 19 min | 1:08 am AKDT (09:08 UTC) |
| 30,000 ft FL300 | 240° at 62 kt | −38 kt | -47 °C | 158 kt | 3 h 06 min | 12:55 am AKDT (08:55 UTC) |
| 34,000 ft FL340 | 240° at 65 kt | −43 kt | -48 °C | 163 kt | 3 h 01 min | 12:50 am AKDT (08:50 UTC) |
| 39,000 ft FL390 | 240° at 63 kt | −42 kt | -47 °C | 162 kt | 3 h 02 min | 12:51 am AKDT (08:51 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ANC | used from 0 nm out; 28 nm from the line | 200/5 | 220/9 -5° | 210/8 -12° | 210/7 -18° | 220/8 -31° | 240/9 -41° | 210/12 -52° | 240/30 -49° | 240/42 -46° |
| MDO | used from 98 nm out; 75 nm from the line | 250/15 | 240/14 -5° | 230/15 -11° | 230/15 -18° | 230/14 -29° | 230/29 -40° | 240/50 -46° | 240/53 -47° | 240/58 -46° |
| YAK | used from 196 nm out; 98 nm from the line | 210/8 | 240/15 -5° | 250/20 -11° | 250/25 -18° | 240/49 -27° | 240/60 -35° | 240/78 -45° | 240/74 -47° | 240/68 -46° |
| JNU | used from 393 nm out; 74 nm from the line | 180/24 | 230/31 0° | 230/32 -6° | 230/41 -12° | 240/62 -21° | 240/73 -32° | 240/94 -45° | 250/94 -50° | 250/78 -50° |
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 |
|---|---|---|---|---|---|---|---|
| MRI Anchorage, AK | departure | VFR Sky: scattered clouds at 2,900 feet, scattered clouds at 3,500 feet, overcast at 4,500 feet | calm | 10+ mi | 4,500 ft | 143 ft | 9:25 pm AKDT (05:25 UTC) |
| IEM Whittier, AK | 39 nm out, 17 nm south of the line | no report just now | 39 ft | ||||
| 7KA Tatitlek, AK | 98 nm out, 6 nm northwest of the line | no report just now | 61 ft | ||||
| CDV Cordova, AK | 137 nm out, 8 nm southwest of the line | marginal VFR Sky: overcast at 2,700 feet Weather: light rain | from the northeast (040°) at 4 knots | 9 mi | 2,700 ft | 53 ft | 04:53 UTC |
| YAK Yakutat, AK | 314 nm out, 6 nm southeast of the line | VFR Sky: a few clouds at 3,000 feet, overcast at 3,600 feet Weather: light rain, mist | from the east (100°) at 5 knots | 6 mi | 3,600 ft | 39 ft | 05:14 UTC |
| GST Gustavus, AK | 461 nm out, 13 nm southwest of the line | VFR Sky: a few clouds at 3,500 feet, a broken layer at 4,800 feet, overcast at 6,000 feet Weather: light rain | from the east-southeast (110°) at 5 knots | 10+ mi | 4,800 ft | 36 ft | 13:56 UTC |
| JNU Juneau, AK | destination | marginal VFR Sky: a broken layer at 1,900 feet, overcast at 2,600 feet Weather: light rain | from the east-southeast (120°) at 14 knots, gusting to 24 | 10+ mi | 1,900 ft | 25 ft | 8:53 pm AKDT (04:53 UTC) |
The highest airport on this list sits at 143 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At JNU when you get there the forecast at the estimated arrival, 12:50 am AKDT (08:50 UTC)
Wind from the east-southeast at 12 knots, gusting to 22, visibility more than 6 miles, light rain, a broken layer at 2,000 feet, overcast at 4,000 feet marginal VFR
The whole forecast for JNU
- From Sun 10:00 pm AKDT (06:00 UTC): wind from the east-southeast at 12 knots, gusting to 22, visibility more than 6 miles, light rain, a broken layer at 2,000 feet, overcast at 4,000 feet
- From Mon 1:00 am AKDT (09:00 UTC): wind from the east at 9 knots, visibility 6 miles, light rain showers, mist, a broken layer at 1,500 feet, overcast at 2,500 feet
- From Mon 11:00 am AKDT (19:00 UTC): wind from the east at 5 knots, visibility more than 6 miles, light rain showers, scattered clouds at 1,500 feet, a broken layer at 2,500 feet and more above
- From Mon 3:00 pm AKDT (23:00 UTC): wind from the east at 8 knots, visibility more than 6 miles, light rain, scattered clouds at 2,000 feet, a broken layer at 3,000 feet
- From Mon 9:00 pm AKDT (05:00 UTC): wind from the east at 5 knots, visibility more than 6 miles, scattered clouds at 2,000 feet, overcast at 4,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/8772 Anchorage, AK, Tuesday, October 13, 2026 through Tuesday, October 13, 2026 Local on the route, at the departure end · security · starts tomorrow · ZAN
- 6/8889 Anchorage, AK, Tuesday, October 13, 2026 through Tuesday, October 13, 2026 Local on the route, at the departure end · a VIP movement · starts tomorrow · ZAN
Daylight
Sunset at MRI 6:56 pm AKDT (02:56 UTC), at JNU 6:01 pm AKDT (02:01 UTC) (civil twilight ends 6:41 pm AKDT (02:41 UTC)). At 120 knots the arrival at JNU is before sunrise there (7:27 am AKDT (15:27 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: Merrill Field, Juneau International.