Thorne Bay Seaplane Base to Clark Bay Seaplane Base KTB → HYL
12 nautical miles (14 statute miles) south on a straight line, true course 194°, about 168° magnetic at the departure end (variation 26E). At 120 knots that is 7 min at the quickest height in today's winds (3,500 ft, a 11-knot headwind), arriving about 12:45 am AKDT (08:45 UTC), after sunset at the destination. 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: 33 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.
Turbulence No turbulence warning in force along the route. No pilot has reported turbulence near the line in the last three hours. The government's turbulence forecast map ↗
Icing No icing warning in force along the route. No pilot has reported icing near the line in the last three hours. The freezing level is below 7,500 ft, the lowest forecast height, so any cloud could carry ice. The government's icing forecast map ↗
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 KTB.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 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 1 forecast point nearest it (ANN). 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 | 160° at 13 kt | +11 kt | 109 kt | 7 min | 12:45 am AKDT (08:45 UTC) | |
| 5,500 ft | 170° at 14 kt | +12 kt | 108 kt | 7 min | 12:45 am AKDT (08:45 UTC) | |
| 7,500 ft | 180° at 14 kt | +13 kt | -3 °C | 107 kt | 7 min | 12:45 am AKDT (08:45 UTC) |
| 9,500 ft | 210° at 14 kt | +14 kt | -5 °C | 106 kt | 7 min | 12:45 am AKDT (08:45 UTC) |
| 11,500 ft | 240° at 19 kt | +14 kt | -8 °C | 106 kt | 7 min | 12:45 am AKDT (08:45 UTC) |
| 13,500 ft | 240° at 27 kt | +17 kt | -12 °C | 103 kt | 7 min | 12:45 am AKDT (08:45 UTC) |
| 15,500 ft | 250° at 37 kt | +22 kt | -15 °C | 98 kt | 7 min | 12:45 am AKDT (08:45 UTC) |
| 17,500 ft | 250° at 47 kt | +27 kt | -19 °C | 93 kt | 8 min | 12:46 am AKDT (08:46 UTC) |
| 18,000 ft FL180 | 250° at 50 kt | +28 kt | -20 °C | 92 kt | 8 min | 12:46 am AKDT (08:46 UTC) |
| 24,000 ft FL240 | 250° at 67 kt | +37 kt | -29 °C | 83 kt | 9 min | 12:47 am AKDT (08:47 UTC) |
| 30,000 ft FL300 | 260° at 83 kt | +34 kt | -43 °C | 86 kt | 8 min | 12:46 am AKDT (08:46 UTC) |
| 34,000 ft FL340 | 260° at 82 kt | +33 kt | -50 °C | 87 kt | 8 min | 12:46 am AKDT (08:46 UTC) |
| 39,000 ft FL390 | 250° at 76 kt | +42 kt | -56 °C | 78 kt | 9 min | 12:47 am AKDT (08:47 UTC) |
Based on data from the 13th at 06:00 UTC; valid on the 13th at 12:00 UTC for use 08:00 to 15:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ANN | used from 0 nm out; 48 nm from the line | 160/13 | 170/14 -2° | 200/14 -4° | 240/20 -9° | 250/50 -20° | 250/67 -29° | 260/83 -43° | 260/82 -50° | 250/76 -56° |
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 |
|---|---|---|---|---|---|---|---|
| KTB Thorne Bay, AK | departure | no report just now | 0 ft | ||||
| HYL Hollis, AK | destination | no report just now | 0 ft |
The codes as issued, and in English, for every airport in the table
At HYL when you get there the forecast at the estimated arrival, 12:45 am AKDT (08:45 UTC)
HYL has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
No temporary flight restriction on or near this route right now.
Notices to air missions closures and things out of service at both ends; airspace, navigation aids and obstructions near the line
KTB: no notice in force.
HYL: no notice in force.
1 notice near the line (airspace and special activity within 25 nm, navigation aids within 25 nm, obstructions within 5 nm):
- Navigation aid DME not monitor until Sun 25 Oct, 7:00 am AKDT (15:00 UTC), estimated · 12 nm along the route, 16 nm off the line · AKW 08/012
as issued
!AKW 08/012 AKW NAV DME NOT MNT 2608172111-2610251500EST
From the FAA's notice service (NOTAMs), the site's copy refreshed every few minutes; last checked 1 minutes ago. The FAA has so far issued eFlight its test feed, which misses some notices (checked against the FAA's own search on 12 October: about a third missing at Santa Barbara and Burbank, none at Atlanta or Las Vegas); the request for the full feed is with the FAA. Times are local to the field. This is for planning; the legal briefing comes from Flight Service or the FAA's own tools.
Daylight
Sunset at KTB 5:52 pm AKDT (01:52 UTC), at HYL 5:53 pm AKDT (01:53 UTC) (civil twilight ends 6:30 pm AKDT (02:30 UTC)). At 120 knots the arrival at HYL is before sunrise there (7:16 am AKDT (15:16 UTC)).
Each restriction opens the FAA's own page with the exact area, heights and times.
The wind over the route live wind map, from Windy.com · drag the time bar for the coming hours; the level menu changes the height
Colours show wind speed, the moving lines its direction, at the surface unless you pick a height. Map and forecast by Windy.com; a second opinion beside the government's winds-aloft table above.
Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads · the turbulence and icing forecasts: turbulence ↗ · icing ↗
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: Thorne Bay Seaplane Base, Clark Bay Seaplane Base.