Piedmont Triad International to Northern Colorado Regional GSO → FNL
1,206 nautical miles (1,388 statute miles) west on a straight line, true course 290°, about 298° magnetic at the departure end (variation 8W). At 120 knots that is 11 h 43 min at the quickest height in today's winds (12,500 ft, a 17-knot headwind), arriving about 1:19 pm MDT (19:19 UTC). Right now GSO is VFR, wind from the west-southwest (240°) at 6 knots; FNL is VFR, wind from the south (170°) at 7 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 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, from 2:00 am EDT (06:00 UTC). 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, from 2:00 am EDT (06:00 UTC). Over the route from 30 to 110 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist), from 2:00 am EDT (06:00 UTC). Over the route from 50 to 199 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), from 2:00 am EDT (06:00 UTC). Over the route from 60 to 389 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), from 2:00 am EDT (06:00 UTC). Over the route from 618 to 1106 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft, from 2:00 am EDT (06:00 UTC). Over the last 120 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft, from 2:00 am EDT (06:00 UTC). Over the last 80 nm of the route.
- 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), from 2:00 am EDT (06:00 UTC). 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 GSO.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B737 at 18,000 ft, 8 nm north, 3:24 am EDT (07:24 UTC): moderate turbulence, remarks: FL180-130. At the destination end, 8 nm north of the line.
as filed, and in English
DEN UA /OV DEN330050/TM 0724/FL180/TP B737/TB MOD/RM FL180-130
- Report
- a routine report filed through DEN
- Where
- 50 nm northwest (330°) of DEN
- Time
- 07:24 UTC
- Height
- at 18,000 ft
- Aircraft
- B737
- Turbulence
- moderate
- Remarks
- FL180-130
- B737 descending, 37 nm south, 3:10 am EDT (07:10 UTC): remarks: smooth. At the destination end, 37 nm south of the line.
as filed, and in English
DEN UA /OV DEN/TM 0710/FLDURD/TP B737/RM SMOOTH
- Report
- a routine report filed through DEN
- Where
- over DEN
- Time
- 07:10 UTC
- Height
- during the descent
- Aircraft
- B737
- Remarks
- smooth
- B738 descending, 37 nm south, 2:15 am EDT (06:15 UTC): light chop turbulence. At the destination end, 37 nm south of the line.
as filed, and in English
DEN UA /OV DEN/TM 0615/FLDURD/TP B738/TB LGT CHOP
- Report
- a routine report filed through DEN
- Where
- over DEN
- Time
- 06:15 UTC
- Height
- during the descent
- Aircraft
- B738
- Turbulence
- light chop
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 11 forecast points nearest it (ROA, TRI, LOU, EVV, STL, COU, MKC, SLN, GRI, GLD, DEN). 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 23 kt | +21 kt | 14 °C | 99 kt | 12 h 11 min | 1:47 pm MDT (19:47 UTC) |
| 6,500 ft | 260° at 21 kt | +21 kt | 15 °C | 99 kt | 12 h 11 min | 1:47 pm MDT (19:47 UTC) |
| 8,500 ft | 270° at 18 kt | +19 kt | 12 °C | 101 kt | 11 h 56 min | 1:32 pm MDT (19:32 UTC) |
| 10,500 ft | 280° at 17 kt | +18 kt | 9 °C | 102 kt | 11 h 49 min | 1:25 pm MDT (19:25 UTC) |
| 12,500 ft | 280° at 16 kt | +17 kt | 5 °C | 103 kt | 11 h 43 min | 1:19 pm MDT (19:19 UTC) |
| 14,500 ft | 280° at 17 kt | +19 kt | 0 °C | 101 kt | 11 h 56 min | 1:32 pm MDT (19:32 UTC) |
| 16,500 ft | 280° at 19 kt | +21 kt | -4 °C | 99 kt | 12 h 11 min | 1:47 pm MDT (19:47 UTC) |
| 18,000 ft FL180 | 280° at 21 kt | +22 kt | -7 °C | 98 kt | 12 h 18 min | 1:54 pm MDT (19:54 UTC) |
| 24,000 ft FL240 | 270° at 24 kt | +25 kt | -19 °C | 95 kt | 12 h 42 min | 2:18 pm MDT (20:18 UTC) |
| 30,000 ft FL300 | 270° at 38 kt | +40 kt | -32 °C | 80 kt | 15 h 04 min | 4:40 pm MDT (22:40 UTC) |
| 34,000 ft FL340 | 280° at 46 kt | +48 kt | -39 °C | 72 kt | 16 h 45 min | 6:21 pm MDT (00:21 UTC) |
| 39,000 ft FL390 | 280° at 45 kt | +46 kt | -49 °C | 74 kt | 16 h 18 min | 5:54 pm MDT (23:54 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; 69 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; 49 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 199 nm out; 83 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 349 nm out; 8 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° |
| STL | used from 448 nm out; 49 nm from the line | 250/24 | 250/24 16° | 260/23 9° | 270/16 6° | 260/25 -6° | 270/29 -19° | 290/34 -33° | 290/48 -41° | 290/54 -51° |
| COU | used from 548 nm out; 35 nm from the line | 230/31 | 230/30 15° | 260/16 11° | 270/14 6° | 260/24 -6° | 270/27 -18° | 270/37 -32° | 280/49 -41° | 290/56 -51° |
| MKC | used from 648 nm out; 48 nm from the line | 220/44 | 250/28 18° | 250/18 13° | 240/12 6° | 280/24 -6° | 240/34 -18° | 260/47 -30° | 260/51 -40° | 270/58 -50° |
| SLN | used from 797 nm out; 68 nm from the line | 210/53 | 230/41 20° | 240/26 14° | 230/16 8° | 240/25 -7° | 240/35 -19° | 250/61 -30° | 260/65 -38° | 260/56 -49° |
| GRI | used from 897 nm out; 68 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° | |
| GLD | used from 947 nm out; 91 nm from the line | 230/49 | 230/42 15° | 220/26 8° | 240/18 -7° | 230/27 -21° | 240/62 -30° | 240/61 -35° | 250/57 -47° | |
| DEN | used from 1096 nm out; 75 nm from the line | 240/21 14° | 250/44 6° | 220/49 -8° | 220/49 -21° | 230/54 -30° | 240/57 -35° | 240/49 -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 3,700 feet | from the west-southwest (240°) at 6 knots | 10+ mi | none | 925 ft | 2:54 am EDT (06:54 UTC) |
| TRI Bristol/Johnson/Kingsport, TN | 120 nm out, 18 nm south of the line, tower | marginal VFR Sky: scattered clouds at 1,200 feet, a broken layer at 2,000 feet, overcast at 2,600 feet Weather: mist | from the west-southwest (240°) at 8 knots | 6 mi | 2,000 ft | 1,518 ft | 06:53 UTC |
| LOZ London, KY | 209 nm out, 9 nm south of the line | VFR | from the north (010°) at 9 knots, gusting to 16 | 10+ mi | none | 1,212 ft | 20:18 UTC |
| OWB Owensboro, KY | 359 nm out, 13 nm south of the line, tower | VFR | calm | 10+ mi | none | 407 ft | 06:56 UTC |
| EVV Evansville, IN | 379 nm out, 3 nm west of the line, tower | marginal VFR Weather: mist | calm | 3 mi | none | 421 ft | 07:00 UTC |
| CPS Cahokia/St Louis, IL | 508 nm out, 2 nm southwest of the line, tower | VFR | from the south (170°) at 3 knots | 10+ mi | none | 412 ft | 06:53 UTC |
| COU Columbia, MO | 608 nm out, 9 nm south of the line, tower | VFR | from the south (190°) at 6 knots | 10+ mi | none | 889 ft | 06:54 UTC |
| MCI Kansas City, MO | 727 nm out, 5 nm south of the line, tower | VFR | from the south-southwest (210°) at 16 knots, gusting to 23 | 10+ mi | none | 1,027 ft | 06:53 UTC |
| RPB Belleville, KS | 867 nm out, 2 nm northeast of the line | no report just now | 1,538 ft | ||||
| MCK Mc Cook, NE | 1006 nm out, 7 nm northeast of the line | VFR | from the southwest (220°) at 10 knots | 10+ mi | none | 2,582 ft | 06:53 UTC |
| GXY Greeley, CO | 1186 nm out, 3 nm west of the line | VFR | from the south (170°) at 7 knots | 10+ mi | none | 4,696 ft | 06:56 UTC |
| FNL Fort Collins/Loveland, CO | destination | VFR | from the south (170°) at 7 knots | 10+ mi | none | 5,020 ft | 12:56 am MDT (06:56 UTC) |
The highest airport on this list sits at 5,020 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At FNL when you get there the forecast at the estimated arrival, 1:19 pm MDT (19:19 UTC)
FNL has no terminal forecast; use the nearest airport that does.
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
- 6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 10 nm from the route, 608 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC
Daylight
Sunset at GSO 6:48 pm EDT (22:48 UTC), at FNL 6:23 pm MDT (00:23 UTC) (civil twilight ends 6:50 pm MDT (00:50 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: Piedmont Triad International, Northern Colorado Regional.