Springfield Robertson County to Smyrna Airport M91 → MQY
37 nautical miles (43 statute miles) southeast on a straight line, true course 148°, about 151° magnetic at the departure end (variation 3W). At 120 knots that is 12 min at the quickest height in today's winds (34,000 ft, a 61-knot tailwind), arriving about 9:55 pm CDT (02:55 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: 8 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 M91.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B739 at 34,000 ft, 29 nm northeast, 8:51 pm CDT (01:51 UTC): light to moderate chop turbulence, remarks: zme. At the departure end, 29 nm northeast of the line.
as filed, and in English
BWG UA /OV BWG270010/TM 0151/FL340/TP B739/TB CONS LGT OCNL MOD CHOP/RM ZME
- Report
- a routine report filed through BWG
- Where
- 10 nm west (270°) of BWG
- Time
- 01:51 UTC
- Height
- at 34,000 ft
- Aircraft
- B739
- Turbulence
- continuous light occasional moderate chop
- Remarks
- zme
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 1 forecast point nearest it (BNA). 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 | 310° at 20 kt | −19 kt | 139 kt | 16 min | 9:59 pm CDT (02:59 UTC) | |
| 5,500 ft | 340° at 20 kt | −19 kt | 139 kt | 16 min | 9:59 pm CDT (02:59 UTC) | |
| 7,500 ft | 330° at 22 kt | −22 kt | 14 °C | 142 kt | 16 min | 9:59 pm CDT (02:59 UTC) |
| 9,500 ft | 330° at 24 kt | −24 kt | 9 °C | 144 kt | 15 min | 9:58 pm CDT (02:58 UTC) |
| 11,500 ft | 340° at 22 kt | −22 kt | 6 °C | 142 kt | 16 min | 9:59 pm CDT (02:59 UTC) |
| 13,500 ft | 340° at 23 kt | −23 kt | 2 °C | 143 kt | 16 min | 9:59 pm CDT (02:59 UTC) |
| 15,500 ft | 330° at 24 kt | −24 kt | -1 °C | 144 kt | 15 min | 9:58 pm CDT (02:58 UTC) |
| 17,500 ft | 330° at 26 kt | −26 kt | -5 °C | 146 kt | 15 min | 9:58 pm CDT (02:58 UTC) |
| 18,000 ft FL180 | 330° at 26 kt | −26 kt | -6 °C | 146 kt | 15 min | 9:58 pm CDT (02:58 UTC) |
| 24,000 ft FL240 | 340° at 29 kt | −28 kt | -18 °C | 148 kt | 15 min | 9:58 pm CDT (02:58 UTC) |
| 30,000 ft FL300 | 330° at 52 kt | −52 kt | -33 °C | 172 kt | 13 min | 9:56 pm CDT (02:56 UTC) |
| 34,000 ft FL340 | 320° at 62 kt | −61 kt | -41 °C | 181 kt | 12 min | 9:55 pm CDT (02:55 UTC) |
| 39,000 ft FL390 | 340° at 45 kt | −44 kt | -50 °C | 164 kt | 14 min | 9:57 pm CDT (02:57 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BNA | used from 0 nm out; 9 nm from the line | 310/20 | 340/20 17° | 330/24 10° | 340/22 5° | 330/26 -6° | 340/29 -18° | 330/52 -33° | 320/62 -41° | 340/45 -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 |
|---|---|---|---|---|---|---|---|
| M91 Springfield, TN | departure | no report just now | 706 ft | ||||
| JWN Nashville, TN | 19 nm out, 10 nm southwest of the line, tower | VFR | calm | 8 mi | none | 501 ft | 02:15 UTC |
| MQY Smyrna, TN | destination | reported, no category | from the south-southeast (160°) at 4 knots | none | 543 ft | 8:56 pm CDT (01:56 UTC) |
The highest airport on this list sits at 706 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At MQY when you get there the forecast at the estimated arrival, 9:55 pm CDT (02:55 UTC)
Wind light and variable, visibility more than 6 miles, clear skies VFR
The whole forecast for MQY
- From Sun 7:00 pm CDT (00:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
- From Mon 4:00 am CDT (09:00 UTC): wind calm, visibility 5 miles, mist, patches of fog, clear skies
- From Mon 9:00 am CDT (14:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 20,000 feet
- From Mon 12:00 pm CDT (17:00 UTC): wind from the west at 7 knots, visibility more than 6 miles, a few clouds at 20,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/0708 Goodlettsville, TN, Saturday, August 1, 2026 through Sunday, August 1, 2027 UTC 4 nm from the route, 19 nm along the route · security · until 1 August · ZME
Daylight
Sunset at M91 6:15 pm CDT (23:15 UTC), at MQY 6:14 pm CDT (23:14 UTC) (civil twilight ends 6:40 pm CDT (23:40 UTC)). At 120 knots the arrival at MQY is after sunset there (6:15 pm CDT (23:15 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: Springfield Robertson County, Smyrna Airport.