Plan a flight · Mon 8:04 am EDT (12:04 UTC)

Piedmont Triad International to Frederick Municipal GSO → FDK

233 nautical miles (269 statute miles) northeast on a straight line, true course 031°, about 039° magnetic at the departure end (variation 8W). At 120 knots that is 1 h 55 min at the quickest height in today's winds (39,000 ft, a 2-knot tailwind), arriving about 9:59 am EDT (13:59 UTC). Right now GSO is VFR, wind from the west-northwest (290°) at 9 knots; FDK is marginal VFR, wind from the west (270°) at 3 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: 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

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 first 146 nm of the route.
AIRMET TANGO 5W: moderate turbulence above 18,000 ft (due to mountain wave) from 29,000 ft to 40,000 ft. Near the route, 19 nm along the route.
AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the last 146 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 33,000 ft. Over the last 136 nm of the route.
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 last 39 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 GSO.

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

E75L at 30,000 ft, 42 nm southeast, 6:51 am EDT (10:51 UTC): moderate turbulence above 30,000 ft. 29 nm along the route, 42 nm southeast of the line.
as filed, and in English
```
RDU UA /OV RDU360020/TM 1051/FLF300/TP E75L/TB MOD 300
```
Report
a routine report filed through RDU
Where
20 nm north (360°) of RDU
Time
10:51 UTC
Height
at F300
Aircraft
E75L
Turbulence
moderate at 30,000 ft
BCS3 at 35,000 ft, 40 nm southwest, 6:57 am EDT (10:57 UTC): remarks: mountain wave + 10 knots ztlfd 28. At the departure end, 40 nm southwest 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
E75L descending, 43 nm northwest, 7:09 am EDT (11:09 UTC): a broken layer above 3,700 ft. 58 nm along the route, 43 nm northwest of the line.
as filed, and in English
```
ROA UA /OV ROA/TM 1109/FLDURD/TP E75L/SK BKN037 050
```
Report
a routine report filed through ROA
Where
over ROA
Time
11:09 UTC
Height
during the descent
Aircraft
E75L
Sky
BKN037 at 5,000 ft
B39M descending, 12 nm east, 6:42 am EDT (10:42 UTC): overcast above 4,000 ft. 204 nm along the route, 12 nm east of the line.
as filed, and in English
```
IAD UA /OV RWY 1R/TM 1042/FLDURD/TP B39M/SK OVC 040/WX 10 SM
```
Report
a routine report filed through IAD
Where
runway 1R
Time
10:42 UTC
Height
during the descent
Aircraft
B39M
Sky
overcast from 4,000 ft
Weather
10, miles
E170 at 1,000 ft, 31 nm southeast, 7:32 am EDT (11:32 UTC): a broken layer above 1,200 ft. 214 nm along the route, 31 nm southeast of the line.
as filed, and in English
```
DCA UA /OV DCA/TM 1132/FL010/TP E170/SK BKN012
```
Report
a routine report filed through DCA
Where
over DCA
Time
11:32 UTC
Height
at 1,000 ft
Aircraft
E170
Sky
a broken layer from 1,200 ft
UAL1428 at 32,000 ft, 17 nm west, 7:36 am EDT (11:36 UTC): no turbulence, -39 °C, wind 360° at 59 knots. 224 nm along the route, 17 nm west of the line.
as filed, and in English
```
ARP UAL1428 3923N 07750W 1136 F320 MS39 360/059KT TB NONE SK CLEAR IC NONE
```
Report
a routine report filed through ARP
B39M at 1,200 ft, 36 nm southeast, 7:10 am EDT (11:10 UTC): remarks: base 1200FT tops 2000FT. At the destination end, 36 nm southeast of the line.
as filed, and in English
```
BWI UA /OV BWI/TM 1110/FL012/TP B39M/RM BASE 1200FT TOPS 2000FT
```
Report
a routine report filed through BWI
Where
over BWI
Time
11:10 UTC
Height
at 1,200 ft
Aircraft
B39M
Remarks
base 1200FT tops 2000FT
B737 at 700 ft, 36 nm southeast, 5:33 am EDT (09:33 UTC): remarks: light rain. At the destination end, 36 nm southeast of the line.
as filed, and in English
```
BWI UA /OV BWI/TM 0933/FL007/TP B737/RM LIGHT RAIN
```
Report
a routine report filed through BWI
Where
over BWI
Time
09:33 UTC
Height
at 700 ft
Aircraft
B737
Remarks
light rain

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 2 forecast points nearest it (ROA, RIC). 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	340° at 31 kt	+17 kt		103 kt	2 h 16 min	10:20 am EDT (14:20 UTC)
5,500 ft	340° at 29 kt	+18 kt		102 kt	2 h 17 min	10:21 am EDT (14:21 UTC)
7,500 ft	340° at 30 kt	+20 kt	11 °C	100 kt	2 h 20 min	10:24 am EDT (14:24 UTC)
9,500 ft	340° at 31 kt	+20 kt	7 °C	100 kt	2 h 20 min	10:24 am EDT (14:24 UTC)
11,500 ft	340° at 28 kt	+16 kt	4 °C	104 kt	2 h 14 min	10:18 am EDT (14:18 UTC)
13,500 ft	330° at 30 kt	+15 kt	0 °C	105 kt	2 h 13 min	10:17 am EDT (14:17 UTC)
15,500 ft	330° at 32 kt	+14 kt	-4 °C	106 kt	2 h 12 min	10:16 am EDT (14:16 UTC)
17,500 ft	330° at 34 kt	+14 kt	-8 °C	106 kt	2 h 12 min	10:16 am EDT (14:16 UTC)
18,000 ft FL180	320° at 35 kt	+14 kt	-9 °C	106 kt	2 h 12 min	10:16 am EDT (14:16 UTC)
24,000 ft FL240	330° at 41 kt	+20 kt	-21 °C	100 kt	2 h 20 min	10:24 am EDT (14:24 UTC)
30,000 ft FL300	330° at 43 kt	+19 kt	-34 °C	101 kt	2 h 18 min	10:22 am EDT (14:22 UTC)
34,000 ft FL340	320° at 42 kt	+16 kt	-39 °C	104 kt	2 h 14 min	10:18 am EDT (14:18 UTC)
39,000 ft FL390	300° at 42 kt	−2 kt	-47 °C	122 kt	1 h 55 min	9:59 am EDT (13:59 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
ROA	used from 0 nm out; 54 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°
RIC	used from 97 nm out; 65 nm from the line	350/34	340/27 12°	340/36 8°	330/31 3°	310/32 -9°	320/34 -21°	300/37 -34°	290/37 -39°	290/42 -46°

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
GSO Greensboro, NC	departure	VFR Sky: a few clouds at 11,000 feet	from the west-northwest (290°) at 9 knots	10+ mi	none	925 ft	7:54 am EDT (11:54 UTC)
SIF Reidsville, NC	19 nm out, 7 nm northwest of the line	VFR	from the west (270°) at 3 knots	10+ mi	none	693 ft	11:55 UTC
LYH Lynchburg, VA	78 nm out, 8 nm northwest of the line, tower	VFR Sky: scattered clouds at 2,100 feet	variable at 3 knots	10+ mi	none	938 ft	11:54 UTC
FVX Farmville, VA	97 nm out, 23 nm east of the line	VFR	calm	10+ mi	none	415 ft	11:55 UTC
CHO Charlottesville, VA	146 nm out, 5 nm southwest of the line, tower	VFR Sky: scattered clouds at 3,700 feet	calm	10+ mi	none	640 ft	11:53 UTC
JYO Leesburg, VA	214 nm out, 4 nm southeast of the line, tower	VFR Sky: overcast at 3,300 feet	from the northwest (320°) at 13 knots, gusting to 16	10+ mi	3,300 ft	389 ft	11:55 UTC
FDK Frederick, MD	destination	marginal VFR Sky: overcast at 2,000 feet	from the west (270°) at 3 knots	10+ mi	2,000 ft	308 ft	7:47 am EDT (11:47 UTC)

The highest airport on this list sits at 938 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At FDK when you get there the forecast at the estimated arrival, 9:59 am EDT (13:59 UTC)

FDK has no terminal forecast; use the nearest airport that does.

The forecast for GSO, the departure

From Mon 8:00 am EDT (12:00 UTC): wind from the west at 9 knots, visibility more than 6 miles, a few clouds at 3,000 feet, a few 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, scattered clouds at 10,000 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

Temporary flight restrictions on the line or within 25 nm of it

4/9383 WASHINGTON, DC., USA 16 nm from the route, 214 nm along the route · security · ZDC
6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local 9 nm from the route, 214 nm along the route · a VIP movement · today · ZDC

Daylight

Sunset at GSO 6:48 pm EDT (22:48 UTC), at FDK 6:35 pm EDT (22:35 UTC) (civil twilight ends 7:02 pm EDT (23:02 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 Southeast · loop National Weather Service

Radar now, the Northeast · 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: Piedmont Triad International, Frederick Municipal.