Wokal Fld/Glasgow-Valley County to Billings Logan International GGW → BIL
165 nautical miles (189 statute miles) southwest on a straight line, true course 209°, about 198° magnetic at the departure end (variation 11E). At 120 knots that is 1 h 16 min at the quickest height in today's winds (4,500 ft, a 11-knot tailwind), arriving about 7:47 pm MDT (01:47 UTC), after sunset at the destination. Right now GGW is marginal VFR, wind from the northeast (040°) at 17 knots; BIL is IFR, wind from the north (010°) 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: 1,401 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
- SIGMET W70W: thunderstorms (a convective SIGMET) up to 32,000 ft, moving from the southwest at 40 knots, until 7:55 pm MDT (01:55 UTC). Near the route, at the destination end.
as issued
WSUS33 KKCI 112355 MKCW WST 112355 CONVECTIVE SIGMET 70W VALID UNTIL 0155Z MT WY FROM 30SSW MLS-60WNW BFF-40SSE OCS-10S BPI-10S BIL-30SSW MLS AREA TS MOV FROM 22040KT. TOPS TO FL320.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the whole route.
- AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 126 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 29 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Near the route, at the destination end.
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 GGW.
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 20:00–03:00 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 (GGW, BIL). 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 | 090° at 20 kt | −11 kt | 0 °C | 131 kt | 1 h 16 min | 7:47 pm MDT (01:47 UTC) |
| 6,500 ft | 090° at 18 kt | −9 kt | 0 °C | 129 kt | 1 h 17 min | 7:48 pm MDT (01:48 UTC) |
| 8,500 ft | 120° at 13 kt | +1 kt | -2 °C | 119 kt | 1 h 23 min | 7:54 pm MDT (01:54 UTC) |
| 10,500 ft | 160° at 16 kt | +10 kt | -1 °C | 110 kt | 1 h 30 min | 8:01 pm MDT (02:01 UTC) |
| 12,500 ft | 170° at 22 kt | +18 kt | -3 °C | 102 kt | 1 h 37 min | 8:08 pm MDT (02:08 UTC) |
| 14,500 ft | 190° at 27 kt | +25 kt | -6 °C | 95 kt | 1 h 44 min | 8:15 pm MDT (02:15 UTC) |
| 16,500 ft | 200° at 33 kt | +32 kt | -9 °C | 88 kt | 1 h 52 min | 8:23 pm MDT (02:23 UTC) |
| 18,000 ft FL180 | 200° at 38 kt | +38 kt | -11 °C | 82 kt | 2 h 01 min | 8:32 pm MDT (02:32 UTC) |
| 24,000 ft FL240 | 230° at 57 kt | +54 kt | -22 °C | 66 kt | 2 h 30 min | 9:01 pm MDT (03:01 UTC) |
| 30,000 ft FL300 | 230° at 63 kt | +60 kt | -37 °C | 60 kt | 2 h 45 min | 9:16 pm MDT (03:16 UTC) |
| 34,000 ft FL340 | 230° at 77 kt | +71 kt | -45 °C | 49 kt | 3 h 22 min | 9:53 pm MDT (03:53 UTC) |
| 39,000 ft FL390 | 240° at 80 kt | +69 kt | -49 °C | 51 kt | 3 h 14 min | 9:45 pm MDT (03:45 UTC) |
Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| GGW | used from 0 nm out; 24 nm from the line | 090/18 0° | 140/12 -2° | 150/13 -3° | 200/35 -12° | 230/56 -22° | 240/75 -37° | 240/81 -46° | 240/78 -49° | |
| BIL | used from 97 nm out; 44 nm from the line | 080/24 | 130/14 -1° | 180/33 0° | 210/43 -10° | 220/58 -21° | 200/55 -36° | 220/75 -44° | 240/83 -48° |
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 |
|---|---|---|---|---|---|---|---|
| GGW Glasgow, MT | departure | marginal VFR Sky: scattered clouds at 1,000 feet, scattered clouds at 2,400 feet, overcast at 3,000 feet Weather: light rain | from the northeast (040°) at 17 knots | 10+ mi | 3,000 ft | 2,295 ft | 5:53 pm MDT (23:53 UTC) |
| JDN Jordan, MT | 48 nm out, 15 nm southeast of the line | reported, no category | from the northeast (040°) at 13 knots, gusting to 22 | none | 2,667 ft | 23:48 UTC | |
| RPX Roundup, MT | 126 nm out, 19 nm west of the line | no report just now | 3,490 ft | ||||
| BIL Billings, MT | destination | IFR Sky: a broken layer at 800 feet, overcast at 1,200 feet Weather: light rain, mist | from the north (010°) at 14 knots | 6 mi | 800 ft | 3,662 ft | 5:53 pm MDT (23:53 UTC) |
The highest airport on this list sits at 3,662 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BIL when you get there the forecast at the estimated arrival, 7:47 pm MDT (01:47 UTC)
Wind from the north-northeast at 11 knots, visibility 6 miles, light rain snow, mist, overcast at 500 feet IFR
The whole forecast for BIL
- From Sun 6:00 pm MDT (00:00 UTC): wind from the north-northeast at 11 knots, visibility 6 miles, light rain snow, mist, overcast at 500 feet
- From Sun 9:00 pm MDT (03:00 UTC): wind from the north at 8 knots, visibility 2 miles, light snow, mist, freezing fog, a broken layer at 500 feet
- From Mon 8:00 am MDT (14:00 UTC): wind from the north-northwest at 5 knots, visibility 6 miles, mist, showers nearby, scattered clouds at 300 feet, a broken layer at 700 feet and more above
- From Mon 3:00 pm MDT (21:00 UTC): wind from the northeast at 6 knots, visibility 6 miles, mist, overcast at 1,500 feet
The forecast for GGW, the departure
- From Sun 6:00 pm MDT (00:00 UTC): wind from the northeast at 12 knots, gusting to 21, visibility 6 miles, light rain, scattered clouds at 1,000 feet, overcast at 2,000 feet
- From Mon 1:00 am MDT (07:00 UTC): wind from the northeast at 12 knots, visibility 3 miles, light rain snow, mist, scattered clouds at 800 feet, overcast at 1,300 feet
- 30% chance between Mon 9:00 am MDT (15:00 UTC) and 11:00 am MDT (17:00 UTC): visibility ¾ mile, light rain snow, mist, a broken layer at 500 feet, a broken layer at 1,100 feet
- From Mon 11:00 am MDT (17:00 UTC): wind light and variable, visibility 6 miles, light rain, mist, scattered clouds at 800 feet, overcast at 1,100 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 GGW 6:23 pm MDT (00:23 UTC), at BIL 6:33 pm MDT (00:33 UTC) (civil twilight ends 7:03 pm MDT (01:03 UTC)). At 120 knots the arrival at BIL is after sunset there (6:35 pm MDT (00:35 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: Wokal Fld/Glasgow-Valley County, Billings Logan International.