Plan a flight · Mon 1:58 am EDT (05:58 UTC)

Piedmont Triad International to Mahlon Sweet Field GSO → EUG

2,020 nautical miles (2,324 statute miles) northwest on a straight line, true course 297°, about 305° magnetic at the departure end (variation 8W). At 120 knots that is 18 h 02 min at the quickest height in today's winds (4,500 ft, a 8-knot headwind), arriving about 5:00 pm PDT (00:00 UTC). Right now GSO is VFR, wind from the west-southwest (250°) at 8 knots; EUG is VFR, wind calm. 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 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 10,000 ft. Over the first 100 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. Over the route from 30 to 110 nm out.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 50 to 190 nm out.
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 route from 60 to 400 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 route from 600 to 1110 nm out.
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 route from 1030 to 1680 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the route from 1140 to 1420 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 1190 to 1430 nm out.
AIRMET TANGO 1W: 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 route from 1200 to 1390 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1260 to 1700 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1310 to 1820 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1580 to 1740 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 200 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1830 to 1910 nm out.

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

E175 at 6,300 ft, 26 nm south, 12:20 am EDT (04:20 UTC): overcast above 6,300 ft, remarks: during the descent runway 31. 1630 nm along the route, 26 nm south of the line.
as filed, and in English
```
SUN UA /OV KSUN/TM 0420/FL063/TP E175/SK OVC063-TOPUNKN/RM DURD RY31
```
Report
a routine report filed through SUN
Where
over KSUN
Time
04:20 UTC
Height
at 6,300 ft
Aircraft
E175
Sky
overcast from 6,300 ft, tops unknown
Remarks
during the descent runway 31
E175 at 5,900 ft, 26 nm south, 11:29 pm EDT (03:29 UTC): a broken layer above 5,900 ft, remarks: during the descent runway 31. 1630 nm along the route, 26 nm south of the line.
as filed, and in English
```
SUN UA /OV KSUN/TM 0329/FL059/TP E175/SK BKN059-TOPUNKN/RM DURD RY31
```
Report
a routine report filed through SUN
Where
over KSUN
Time
03:29 UTC
Height
at 5,900 ft
Aircraft
E175
Sky
a broken layer from 5,900 ft, tops unknown
Remarks
during the descent runway 31
E175 at 5,700 ft, 26 nm south, 10:59 pm EDT (02:59 UTC): a broken layer above 5,700 ft, remarks: during the descent runway 31. 1630 nm along the route, 26 nm south of the line.
as filed, and in English
```
SUN UA /OV KSUN/TM 0259/FL057/TP E175/SK BKN057-TOPUNKN/RM DURD RY31
```
Report
a routine report filed through SUN
Where
over KSUN
Time
02:59 UTC
Height
at 5,700 ft
Aircraft
E175
Sky
a broken layer from 5,700 ft, tops unknown
Remarks
during the descent runway 31
B737 at 10,000 ft, 7 nm north, 12:25 am EDT (04:25 UTC): no icing, remarks: during the descent runway 5. 1930 nm along the route, 7 nm north of the line.
as filed, and in English
```
RDM UA /OV RDM/TM 0425/FL100/TP B737/TA UNKN/IC NEG/RM DURD RWY 5
```
Report
a routine report filed through RDM
Where
over RDM
Time
04:25 UTC
Height
at 10,000 ft
Aircraft
B737
Temperature
UNKN
Icing
none
Remarks
during the descent runway 5
UAL737 at 31,000 ft, 5 nm northwest, 11:17 pm EDT (03:17 UTC): no turbulence, wind 358° at 94 knots. At the destination end, 5 nm northwest of the line.
as filed, and in English
```
ARP UAL737 4410N 12318W 0317 F310 358/094KT TB SMTH IC
```
Report
a routine report filed through ARP

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 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 16 forecast points nearest it (ROA, TRI, LOU, EVV, SPI, BRL, DSM, OMA, GRI, ONL, BFF, LND, PIH, BOI, RDM, OTH). 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	250° at 11 kt	+8 kt	8 °C	112 kt	18 h 02 min	5:00 pm PDT (00:00 UTC)
6,500 ft	260° at 10 kt	+10 kt	11 °C	110 kt	18 h 22 min	5:20 pm PDT (00:20 UTC)
8,500 ft	270° at 11 kt	+10 kt	7 °C	110 kt	18 h 22 min	5:20 pm PDT (00:20 UTC)
10,500 ft	270° at 11 kt	+11 kt	4 °C	109 kt	18 h 32 min	5:30 pm PDT (00:30 UTC)
12,500 ft	260° at 12 kt	+12 kt	0 °C	108 kt	18 h 42 min	5:40 pm PDT (00:40 UTC)
14,500 ft	260° at 14 kt	+14 kt	-4 °C	106 kt	19 h 03 min	6:01 pm PDT (01:01 UTC)
16,500 ft	260° at 17 kt	+16 kt	-8 °C	104 kt	19 h 25 min	6:23 pm PDT (01:23 UTC)
18,000 ft FL180	260° at 19 kt	+18 kt	-11 °C	102 kt	19 h 48 min	6:46 pm PDT (01:46 UTC)
24,000 ft FL240	270° at 24 kt	+23 kt	-22 °C	97 kt	20 h 49 min	7:47 pm PDT (02:47 UTC)
30,000 ft FL300	260° at 30 kt	+29 kt	-33 °C	91 kt	22 h 12 min	9:10 pm PDT (04:10 UTC)
34,000 ft FL340	270° at 39 kt	+39 kt	-38 °C	81 kt	24 h 56 min	11:54 pm PDT (06:54 UTC)
39,000 ft FL390	260° at 42 kt	+42 kt	-46 °C	78 kt	25 h 54 min	12:52 am PDT (07:52 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
ROA	used from 0 nm out; 65 nm from the line	310/29	330/31 13°	340/28 7°	330/25 3°	310/32 -8°	300/32 -22°	290/32 -31°	270/35 -38°	270/32 -47°
TRI	used from 50 nm out; 53 nm from the line		330/22 11°	330/29 7°	330/32 3°	330/36 -8°	320/34 -19°	320/36 -34°	320/43 -39°	320/46 -47°
LOU	used from 200 nm out; 77 nm from the line	310/18	340/28 16°	340/29 10°	350/27 3°	330/27 -7°	340/39 -19°	330/58 -33°	330/67 -41°	330/40 -49°
EVV	used from 350 nm out; 49 nm from the line	280/15	290/12 17°	310/16 10°	320/13 5°	310/22 -6°	320/26 -18°	320/38 -33°	310/56 -41°	320/55 -51°
SPI	used from 450 nm out; 40 nm from the line	220/21	250/23 16°	260/27 9°	270/14 6°	270/23 -7°	270/31 -19°	270/28 -33°	290/48 -42°	300/55 -52°
BRL	used from 550 nm out; 47 nm from the line	230/24	240/29 15°	290/16 10°	280/15 4°	260/23 -7°	260/32 -19°	260/36 -33°	280/48 -41°	280/59 -52°
DSM	used from 650 nm out; 63 nm from the line	230/40	250/33 17°	250/18 12°	240/17 5°	260/28 -8°	270/34 -19°	260/41 -33°	260/55 -41°	270/62 -51°
OMA	used from 750 nm out; 34 nm from the line	220/47	240/33 19°	250/18 11°	230/17 6°	260/29 -8°	250/33 -19°	250/51 -33°	260/61 -40°	270/62 -49°
GRI	used from 850 nm out; 58 nm from the line		230/35 21°	230/23 13°	220/20 7°	240/25 -8°	240/37 -20°	250/49 -33°	260/57 -38°	260/58 -47°
ONL	used from 900 nm out; 42 nm from the line		210/31 20°	230/27 13°	230/18 7°	220/19 -8°	240/26 -20°	250/44 -35°	270/52 -39°	260/57 -47°
BFF	used from 1050 nm out; 93 nm from the line		180/28	220/33 15°	210/31 7°	230/32 -9°	220/41 -21°	220/40 -33°	240/47 -36°	250/54 -46°
LND	used from 1250 nm out; 117 nm from the line			200/23 6°	220/31 1°	220/39 -11°	230/39 -23°	220/51 -28°	220/66 -37°	230/68 -45°
PIH	used from 1500 nm out; 62 nm from the line		L/V	240/13 1°	240/15 -3°	210/42 -15°	200/70 -25°	220/74 -29°	220/71 -36°	220/62 -43°
BOI	used from 1650 nm out; 50 nm from the line		300/7 2°	280/5 -4°	210/16 -9°	210/60 -20°	210/75 -29°	210/63 -32°	220/64 -32°	220/54 -39°
RDM	used from 1800 nm out; 106 nm from the line		040/17 -1°	030/31 -8°	010/29 -12°	010/61 -19°	360/95 -25°	360/82 -36°	360/40 -37°	310/19 -40°
OTH	used from 2000 nm out; 70 nm from the line	040/15	040/14 1°	030/25 -4°	010/42 -6°	360/74 -13°	360/79 -24°	350/92 -39°	350/64 -46°	310/32 -45°

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 4,000 feet, a few clouds at 7,000 feet	from the west-southwest (250°) at 8 knots	10+ mi	none	925 ft	1:54 am EDT (05:54 UTC)
CPF Hazard, KY	180 nm out, 3 nm southeast of the line	low IFR Sky: overcast at 400 feet Weather: mist	from the west-northwest (290°) at 5 knots	5 mi	400 ft	1,256 ft	06:15 UTC
LOU Louisville, KY	300 nm out, 4 nm southwest of the line, tower	low IFR Weather: mist	calm	0.75 mi	none	545 ft	05:53 UTC
SPI Springfield, IL	510 nm out, 14 nm north of the line, tower	VFR	from the south (180°) at 8 knots	10+ mi	none	597 ft	05:52 UTC
CBF Council Bluffs, IA	800 nm out, 3 nm northwest of the line	VFR	from the south (190°) at 14 knots, gusting to 23	10+ mi	none	1,244 ft	05:35 UTC
OMA Omaha, NE	810 nm out, 3 nm northeast of the line, tower	VFR Sky: a few clouds at 25,000 feet	from the south-southeast (150°) at 8 knots	10+ mi	none	984 ft	05:52 UTC
LSK Lusk, WY	1200 nm out, 8 nm south of the line	no report just now				4,966 ft
CPR Casper, WY	1290 nm out, 16 nm south of the line, tower	VFR Sky: scattered clouds at 9,000 feet, a broken layer at 11,000 feet	from the north-northwest (340°) at 6 knots	10+ mi	11,000 ft	5,344 ft	05:53 UTC
JAC Jackson, WY	1480 nm out, 3 nm south of the line, tower	VFR Sky: a broken layer at 4,700 feet, overcast at 7,000 feet	from the south-southwest (200°) at 11 knots	10+ mi	4,700 ft	6,451 ft	04:56 UTC
ONO Ontario, OR	1750 nm out, 4 nm southwest of the line	VFR	from the northwest (320°) at 16 knots, gusting to 22	10+ mi	none	2,193 ft	05:53 UTC
RDM Redmond, OR	1930 nm out, 7 nm north of the line, tower	VFR Sky: overcast at 7,500 feet	calm	10+ mi	7,500 ft	3,081 ft	04:56 UTC
EUG Eugene, OR	destination	VFR Sky: scattered clouds at 7,000 feet	calm	10+ mi	none	373 ft	10:54 pm PDT (05:54 UTC)

The highest airport on this list sits at 6,451 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At EUG when you get there the forecast at the estimated arrival, 5:00 pm PDT (00:00 UTC)

Wind from the north at 5 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for EUG

From Sun 11:00 pm PDT (06:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
From Mon 2:00 pm PDT (21:00 UTC): wind from the north at 5 knots, visibility more than 6 miles, clear skies

The forecast for GSO, the departure

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

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 GSO 6:48 pm EDT (22:48 UTC), at EUG 6:34 pm PDT (01:34 UTC) (civil twilight ends 7:03 pm PDT (02:03 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 central Great Lakes · loop National Weather Service

Radar now, the upper Mississippi valley · 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, Mahlon Sweet Field.