Northern Colorado Regional to Piedmont Triad International FNL → GSO
1,206 nautical miles (1,388 statute miles) east on a straight line, true course 094°, about 085° magnetic at the departure end (variation 9E). At 120 knots that is 7 h 11 min at the quickest height in today's winds (34,000 ft, a 48-knot tailwind), arriving about 10:46 am EDT (14:46 UTC). Right now FNL is VFR, wind from the south (170°) at 7 knots; GSO is VFR, wind from the west-southwest (240°) at 6 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 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 12:00 am MDT (06:00 UTC). Near the route, at the departure end.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft, from 12:00 am MDT (06:00 UTC). Over the first 120 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft, from 12:00 am MDT (06:00 UTC). Over the first 80 nm of the route.
- 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 12:00 am MDT (06:00 UTC). Over the route from 100 to 588 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 12:00 am MDT (06:00 UTC). Over the route from 817 to 1146 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist), from 12:00 am MDT (06:00 UTC). Over the route from 1006 to 1156 nm out.
- AIRMET TANGO 5W: moderate turbulence above 18,000 ft (due to mountain wave) from 29,000 ft to 40,000 ft, from 12:00 am MDT (06:00 UTC). Over the route from 1096 to 1176 nm out.
- AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 10,000 ft, from 12:00 am MDT (06:00 UTC). Over the last 100 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 FNL.
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, 1:24 am MDT (07:24 UTC): moderate turbulence, remarks: FL180-130. At the departure 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, 1:10 am MDT (07:10 UTC): remarks: smooth. At the departure 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, 12:15 am MDT (06:15 UTC): light chop turbulence. At the departure 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 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 12 forecast points nearest it (DEN, GLD, GRI, SLN, MKC, COU, STL, EVV, 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 | 240° at 24 kt | −19 kt | 139 kt | 8 h 41 min | 12:16 pm EDT (16:16 UTC) | |
| 5,500 ft | 260° at 22 kt | −21 kt | 13 °C | 141 kt | 8 h 33 min | 12:08 pm EDT (16:08 UTC) |
| 7,500 ft | 260° at 20 kt | −20 kt | 13 °C | 140 kt | 8 h 37 min | 12:12 pm EDT (16:12 UTC) |
| 9,500 ft | 270° at 18 kt | −19 kt | 10 °C | 139 kt | 8 h 41 min | 12:16 pm EDT (16:16 UTC) |
| 11,500 ft | 280° at 16 kt | −17 kt | 6 °C | 137 kt | 8 h 48 min | 12:23 pm EDT (16:23 UTC) |
| 13,500 ft | 280° at 17 kt | −18 kt | 2 °C | 138 kt | 8 h 44 min | 12:19 pm EDT (16:19 UTC) |
| 15,500 ft | 280° at 19 kt | −20 kt | -2 °C | 140 kt | 8 h 37 min | 12:12 pm EDT (16:12 UTC) |
| 17,500 ft | 280° at 21 kt | −22 kt | -6 °C | 142 kt | 8 h 30 min | 12:05 pm EDT (16:05 UTC) |
| 18,000 ft FL180 | 280° at 21 kt | −22 kt | -7 °C | 142 kt | 8 h 30 min | 12:05 pm EDT (16:05 UTC) |
| 24,000 ft FL240 | 270° at 25 kt | −26 kt | -19 °C | 146 kt | 8 h 16 min | 11:51 am EDT (15:51 UTC) |
| 30,000 ft FL300 | 270° at 38 kt | −40 kt | -32 °C | 160 kt | 7 h 32 min | 11:07 am EDT (15:07 UTC) |
| 34,000 ft FL340 | 280° at 46 kt | −48 kt | -39 °C | 168 kt | 7 h 11 min | 10:46 am EDT (14:46 UTC) |
| 39,000 ft FL390 | 280° at 45 kt | −47 kt | -49 °C | 167 kt | 7 h 13 min | 10:48 am EDT (14:48 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| DEN | used from 0 nm out; 35 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° | ||
| GLD | used from 100 nm out; 60 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° | |
| GRI | used from 249 nm out; 71 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° | |
| SLN | used from 299 nm out; 64 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° |
| MKC | used from 399 nm out; 65 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° |
| COU | used from 548 nm out; 28 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° |
| STL | used from 648 nm out; 13 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° |
| EVV | used from 747 nm out; 52 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° |
| LOU | used from 897 nm out; 38 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° |
| TRI | used from 997 nm out; 67 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° | |
| ROA | used from 1146 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° |
| RDU | used from 1196 nm out; 63 nm from the line | 280/33 | 300/23 11° | 300/28 8° | 290/28 4° | 260/41 -6° | 240/52 -18° | 230/66 -31° | 230/76 -39° | 240/52 -49° |
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 |
|---|---|---|---|---|---|---|---|
| FNL Fort Collins/Loveland, CO | departure | VFR | from the south (170°) at 7 knots | 10+ mi | none | 5,020 ft | 12:56 am MDT (06:56 UTC) |
| GXY Greeley, CO | 20 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 |
| MCK Mc Cook, NE | 199 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 |
| RPB Belleville, KS | 339 nm out, 2 nm northeast of the line | no report just now | 1,538 ft | ||||
| MCI Kansas City, MO | 478 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 |
| COU Columbia, MO | 598 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 |
| CPS Cahokia/St Louis, IL | 698 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 |
| EVV Evansville, IN | 827 nm out, 3 nm west of the line, tower | marginal VFR Weather: mist | calm | 3 mi | none | 421 ft | 07:00 UTC |
| OWB Owensboro, KY | 847 nm out, 13 nm south of the line, tower | VFR | calm | 10+ mi | none | 407 ft | 06:56 UTC |
| LOZ London, KY | 997 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 |
| TRI Bristol/Johnson/Kingsport, TN | 1086 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 |
| GSO Greensboro, NC | destination | 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) |
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 GSO when you get there the forecast at the estimated arrival, 10:46 am EDT (14:46 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 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
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, 598 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC
Daylight
Sunset at FNL 6:23 pm MDT (00:23 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
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: Northern Colorado Regional, Piedmont Triad International.