Plan a flight · Mon 7:23 am EDT (11:23 UTC)

Louisville Muhammad Ali International to Piedmont Triad International SDF → GSO

304 nautical miles (350 statute miles) east on a straight line, true course 112°, about 117° magnetic at the departure end (variation 5W). At 120 knots that is 1 h 51 min at the quickest height in today's winds (34,000 ft, a 45-knot tailwind), arriving about 9:14 am EDT (13:14 UTC). Right now SDF is VFR, wind from the southeast (140°) at 3 knots; GSO is VFR, wind from the west-southwest (250°) at 8 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: 1,053 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 SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the first 235 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 98 to 255 nm out.
AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the route from 196 to 284 nm out.
AIRMET TANGO 5W: moderate turbulence above 18,000 ft (due to mountain wave) from 29,000 ft to 40,000 ft. Over the route from 216 to 275 nm out.
AIRMET TANGO 3W: 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 49 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 SDF.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

PC12 at 17,000 ft, 44 nm north, 7:01 am EDT (11:01 UTC): no turbulence, clear from 17,000 ft to 60,000 ft, remarks: lil dark. 49 nm along the route, 44 nm north of the line.
as filed, and in English
```
LEX UA /OV HYK360035/TM 1101/FL170/TP PC12/SK SKC/TB NEG/RM LIL DARK
```
Report
a routine report filed through LEX
Where
35 nm north (360°) of HYK
Time
11:01 UTC
Height
at 17,000 ft
Aircraft
PC12
Sky
clear
Turbulence
none
Remarks
lil dark
E170 at 1,100 ft, 13 nm northeast, 6:11 am EDT (10:11 UTC): overcast from 1,100 ft to 1,300 ft, remarks: cig VV001/IN clouds on rotation cor. 49 nm along the route, 13 nm northeast of the line.
as filed, and in English
```
LEX UA /OV LEX /TM 1011 /FL011 /TP E170 /SK OVC011-TOP013 /RM CIG VV001/IN CLOUDS ON ROTATION -COR
```
Report
a routine report filed through LEX
Where
over LEX
Time
10:11 UTC
Height
at 1,100 ft
Aircraft
E170
Sky
overcast from 1,100 ft, tops 1,300 ft
Remarks
cig VV001/IN clouds on rotation cor
E170 at 100 ft, 13 nm northeast, 6:11 am EDT (10:11 UTC): remarks: in the clouds on rotation. 49 nm along the route, 13 nm northeast of the line.
as filed, and in English
```
LEX UA /OV LEX/TM 1011/FL001/TP E170/SK VV001-TOP013/RM IN THE CLOUDS ON ROTATION
```
Report
a routine report filed through LEX
Where
over LEX
Time
10:11 UTC
Height
at 100 ft
Aircraft
E170
Sky
sky obscured from 100 ft, tops 1,300 ft
Remarks
in the clouds on rotation
CRJ7 at 5,000 ft, 18 nm northeast, 5:37 am EDT (09:37 UTC): scattered clouds above 10,000 ft, remarks: during the climb. 49 nm along the route, 18 nm northeast of the line.
as filed, and in English
```
LEX UA /OV HYK330010/TM 0937/FL050/TP CRJ7/SK SCT001/RM DURC
```
Report
a routine report filed through LEX
Where
10 nm northwest (330°) of HYK
Time
09:37 UTC
Height
at 5,000 ft
Aircraft
CRJ7
Sky
scattered clouds from 100 ft
Remarks
during the climb
CRJ9 at 6,000 ft, 36 nm southwest, 6:10 am EDT (10:10 UTC): a broken layer from 4,600 ft to 5,800 ft. 186 nm along the route, 36 nm southwest of the line.
as filed, and in English
```
TRI UA /OV BOOIE/TM 1010/FL060/TP CRJ9/SK BKN046-TOP058
```
Report
a routine report filed through TRI
Where
booie
Time
10:10 UTC
Height
at 6,000 ft
Aircraft
CRJ9
Sky
a broken layer from 4,600 ft, tops 5,800 ft
BCS3 at 35,000 ft, 31 nm south, 6:57 am EDT (10:57 UTC): remarks: mountain wave + 10 knots ztlfd 28. 275 nm along the route, 31 nm south of the line.
as filed, and in English
```
ATL UA /OV BZM100026/TM 1057/FL350/TP BCS3/RM MOUNTAIN WAVE +/- 10KTS ZTLFD 28
```
Report
a routine report filed through ATL
Where
26 nm east (100°) of BZM
Time
10:57 UTC
Height
at 35,000 ft
Aircraft
BCS3
Remarks
mountain wave + 10 knots ztlfd 28

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 4 forecast points nearest it (LOU, TRI, ROA, RDU). 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 22 kt	−21 kt		141 kt	2 h 09 min	9:32 am EDT (13:32 UTC)
5,500 ft	330° at 23 kt	−19 kt	11 °C	139 kt	2 h 11 min	9:34 am EDT (13:34 UTC)
7,500 ft	340° at 25 kt	−18 kt	11 °C	138 kt	2 h 12 min	9:35 am EDT (13:35 UTC)
9,500 ft	340° at 27 kt	−18 kt	8 °C	138 kt	2 h 12 min	9:35 am EDT (13:35 UTC)
11,500 ft	340° at 25 kt	−18 kt	5 °C	138 kt	2 h 12 min	9:35 am EDT (13:35 UTC)
13,500 ft	340° at 27 kt	−20 kt	2 °C	140 kt	2 h 10 min	9:33 am EDT (13:33 UTC)
15,500 ft	330° at 30 kt	−23 kt	-2 °C	143 kt	2 h 08 min	9:31 am EDT (13:31 UTC)
17,500 ft	330° at 33 kt	−27 kt	-6 °C	147 kt	2 h 04 min	9:27 am EDT (13:27 UTC)
18,000 ft FL180	330° at 34 kt	−27 kt	-7 °C	147 kt	2 h 04 min	9:27 am EDT (13:27 UTC)
24,000 ft FL240	320° at 37 kt	−32 kt	-19 °C	152 kt	2 h	9:23 am EDT (13:23 UTC)
30,000 ft FL300	330° at 44 kt	−35 kt	-33 °C	155 kt	1 h 58 min	9:21 am EDT (13:21 UTC)
34,000 ft FL340	330° at 54 kt	−45 kt	-41 °C	165 kt	1 h 51 min	9:14 am EDT (13:14 UTC)
39,000 ft FL390	310° at 45 kt	−42 kt	-50 °C	162 kt	1 h 53 min	9:16 am EDT (13:16 UTC)

Based on data from the 12th at 06:00 UTC; valid on the 12th 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
LOU	used from 0 nm out; 23 nm from the line	300/16	310/19 15°	310/17 9°	300/15 4°	300/26 -6°	280/34 -19°	290/30 -34°	310/49 -42°	310/58 -51°
TRI	used from 98 nm out; 71 nm from the line		340/25 11°	350/37 9°	350/34 6°	340/39 -7°	340/43 -19°	340/55 -32°	330/58 -42°	320/37 -50°
ROA	used from 245 nm out; 65 nm from the line	310/32	340/32 14°	350/25 9°	340/24 3°	340/42 -8°	340/52 -20°	350/62 -34°	350/64 -39°	310/44 -48°
RDU	used from 294 nm out; 62 nm from the line	330/30	340/24 12°	330/26 7°	320/30 3°	330/39 -8°	310/30 -20°	300/33 -33°	310/34 -39°	310/41 -47°

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
SDF Louisville, KY	departure	VFR Sky: a few clouds at 25,000 feet	from the southeast (140°) at 3 knots	7 mi	none	500 ft	6:56 am EDT (10:56 UTC)
BRY Bardstown, KY	20 nm out, 16 nm southwest of the line	IFR Weather: mist	calm	2 mi	none	669 ft	11:15 UTC
LEX Lexington, KY	49 nm out, 13 nm northeast of the line, tower	low IFR Sky: sky obscured at 200 feet Weather: fog	from the south-southwest (200°) at 6 knots	0.25 mi	200 ft	979 ft	10:54 UTC
CPF Hazard, KY	127 nm out, 3 nm north of the line	IFR Sky: overcast at 600 feet Weather: mist	from the west-southwest (240°) at 4 knots	5 mi	600 ft	1,256 ft	11:35 UTC
LNP Wise, VA	167 nm out, 5 nm south of the line	low IFR Sky: overcast at 200 feet Weather: light drizzle	from the west-northwest (300°) at 6 knots	4 mi	200 ft	2,684 ft	11:15 UTC
VJI Abingdon, VA	196 nm out, 12 nm south of the line	marginal VFR Sky: overcast at 1,300 feet	from the west (270°) at 5 knots	9 mi	1,300 ft	2,087 ft	11:15 UTC
GEV Jefferson, NC	235 nm out, 14 nm southwest of the line	marginal VFR Sky: overcast at 1,500 feet	from the west-northwest (290°) at 7 knots, gusting to 19	10+ mi	1,500 ft	3,177 ft	11:15 UTC
MWK Mount Airy, NC	265 nm out, 7 nm northeast of the line	marginal VFR Sky: a broken layer at 3,000 feet	variable at 6 knots	10+ mi	3,000 ft	1,268 ft	11:15 UTC
GSO Greensboro, NC	destination	VFR Sky: a few clouds at 3,400 feet, a few clouds at 12,000 feet	from the west-southwest (250°) at 8 knots	10+ mi	none	925 ft	6:54 am EDT (10:54 UTC)

The highest airport on this list sits at 3,177 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At GSO when you get there the forecast at the estimated arrival, 9:14 am EDT (13:14 UTC)

Wind from the west at 9 knots, visibility more than 6 miles, scattered clouds at 4,000 feet, scattered clouds at 10,000 feet VFR

The whole forecast for GSO

From Mon 2:00 am EDT (06:00 UTC): wind from the west at 9 knots, visibility more than 6 miles, scattered clouds at 4,000 feet, scattered clouds at 10,000 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the northwest at 11 knots, gusting to 19, visibility more than 6 miles, scattered clouds at 3,000 feet, a broken layer at 4,500 feet
From Mon 5:30 pm EDT (21:30 UTC): wind from the northwest at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for SDF, the departure

From Mon 8:00 am EDT (12:00 UTC): wind light and variable, visibility 6 miles, mist, clear skies
From Mon 10:00 am EDT (14:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the southwest at 9 knots, visibility more than 6 miles, clear skies
From Tue 2:00 am EDT (06:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, clear skies

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 SDF 7:09 pm EDT (23:09 UTC), at GSO 6:48 pm EDT (22:48 UTC) (civil twilight ends 7:13 pm EDT (23:13 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

Radar now, the central Great Lakes · loop National Weather Service

Radar now, the Southeast · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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: Louisville Muhammad Ali International, Piedmont Triad International.