University Of Illinois/Willard Airport to Northwest Arkansas Ntl Airport CMI → XNA
363 nautical miles (418 statute miles) southwest on a straight line, true course 234°, about 237° magnetic at the departure end (variation 3W). At 120 knots that is 3 h 29 min at the quickest height in today's winds (8,500 ft, a 16-knot headwind), arriving about 8:32 am CDT (13:32 UTC). Right now CMI is VFR, wind from the south-southwest (200°) at 4 knots; XNA is VFR, wind from the south (190°) at 5 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: 6 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 2W: 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 88 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 CMI.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
No pilot reports within 50 nautical miles of the line in the last three hours.
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 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 4 forecast points nearest it (SPI, STL, COU, SGF). 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 25 kt | +24 kt | 96 kt | 3 h 47 min | 8:50 am CDT (13:50 UTC) | |
| 6,500 ft | 250° at 19 kt | +18 kt | 14 °C | 102 kt | 3 h 34 min | 8:37 am CDT (13:37 UTC) |
| 8,500 ft | 250° at 16 kt | +16 kt | 12 °C | 104 kt | 3 h 29 min | 8:32 am CDT (13:32 UTC) |
| 10,500 ft | 250° at 17 kt | +16 kt | 9 °C | 104 kt | 3 h 29 min | 8:32 am CDT (13:32 UTC) |
| 12,500 ft | 260° at 19 kt | +17 kt | 6 °C | 103 kt | 3 h 31 min | 8:34 am CDT (13:34 UTC) |
| 14,500 ft | 260° at 22 kt | +19 kt | 1 °C | 101 kt | 3 h 36 min | 8:39 am CDT (13:39 UTC) |
| 16,500 ft | 270° at 25 kt | +20 kt | -4 °C | 100 kt | 3 h 38 min | 8:41 am CDT (13:41 UTC) |
| 18,000 ft FL180 | 270° at 27 kt | +22 kt | -7 °C | 98 kt | 3 h 42 min | 8:45 am CDT (13:45 UTC) |
| 24,000 ft FL240 | 260° at 31 kt | +27 kt | -18 °C | 93 kt | 3 h 54 min | 8:57 am CDT (13:57 UTC) |
| 30,000 ft FL300 | 280° at 54 kt | +36 kt | -31 °C | 84 kt | 4 h 19 min | 9:22 am CDT (14:22 UTC) |
| 34,000 ft FL340 | 280° at 59 kt | +39 kt | -40 °C | 81 kt | 4 h 29 min | 9:32 am CDT (14:32 UTC) |
| 39,000 ft FL390 | 300° at 57 kt | +26 kt | -49 °C | 94 kt | 3 h 52 min | 8:55 am CDT (13:55 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SPI | used from 0 nm out; 45 nm from the line | 260/28 | 250/22 15° | 250/14 9° | 260/20 6° | 280/27 -7° | 280/34 -19° | 280/48 -32° | 280/59 -41° | 300/60 -49° |
| STL | used from 98 nm out; 3 nm from the line | 250/26 | 240/21 15° | 240/22 11° | 250/23 6° | 270/28 -7° | 260/30 -19° | 280/52 -31° | 280/57 -40° | 300/57 -49° |
| COU | used from 196 nm out; 62 nm from the line | 250/36 | 260/14 16° | 250/5 12° | 260/12 6° | 260/24 -7° | 260/35 -19° | 280/58 -31° | 280/62 -40° | 290/60 -49° |
| SGF | used from 245 nm out; 27 nm from the line | 230/37 | 260/20 15° | 250/16 13° | 250/15 8° | 260/28 -7° | 250/31 -17° | 280/59 -31° | 280/59 -39° | 290/55 -50° |
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 |
|---|---|---|---|---|---|---|---|
| CMI Champaign/Urbana, IL | departure | VFR | from the south-southwest (200°) at 4 knots | 10+ mi | none | 754 ft | 4:53 am CDT (09:53 UTC) |
| DEC Decatur, IL | 29 nm out, 6 nm northwest of the line, tower | VFR | from the southwest (220°) at 8 knots | 10+ mi | none | 681 ft | 09:54 UTC |
| TAZ Taylorville, IL | 59 nm out, 5 nm north of the line | no report just now | 622 ft | ||||
| ALN Alton/St Louis, IL | 108 nm out, 6 nm southeast of the line, tower | VFR | calm | 10+ mi | none | 543 ft | 09:55 UTC |
| SUS St Louis, MO | 137 nm out, 1 nm northwest of the line, tower | VFR | calm | 7 mi | none | 463 ft | 09:54 UTC |
| UBX Cuba, MO | 186 nm out, 5 nm south of the line | no report just now | 1,023 ft | ||||
| TBN Fort Leonard Wood, MO | 226 nm out, 2 nm west of the line, tower | VFR | from the south (180°) at 5 knots | 10+ mi | none | 1,159 ft | 09:55 UTC |
| LBO Lebanon, MO | 245 nm out, 13 nm northwest of the line | VFR | from the south-southwest (210°) at 6 knots | 10+ mi | none | 1,320 ft | 09:55 UTC |
| SGF Springfield, MO | 294 nm out, 16 nm northwest of the line, tower | VFR | from the south (170°) at 9 knots | 10+ mi | none | 1,268 ft | 09:52 UTC |
| HFJ Monett, MO | 324 nm out, 20 nm northwest of the line | VFR | from the south (190°) at 9 knots | 10+ mi | none | 1,316 ft | 09:55 UTC |
| XNA Fayetteville/Springdale/Rogers, AR | destination | VFR | from the south (190°) at 5 knots | 10+ mi | none | 1,288 ft | 4:53 am CDT (09:53 UTC) |
The highest airport on this list sits at 1,320 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At XNA when you get there the forecast at the estimated arrival, 8:32 am CDT (13:32 UTC)
Wind from the south-southwest at 6 knots, visibility more than 6 miles, low-level wind shear, a few clouds at 5,000 feet VFR
The whole forecast for XNA
- From Mon 1:00 am CDT (06:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, low-level wind shear, a few clouds at 5,000 feet
- From Mon 10:00 am CDT (15:00 UTC): wind from the south-southwest at 16 knots, gusting to 25, visibility more than 6 miles, clear skies
- From Mon 7:00 pm CDT (00:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
The forecast for CMI, the departure
- From Mon 1:00 am CDT (06:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
- From Mon 9:00 am CDT (14:00 UTC): wind from the south-southwest at 11 knots, visibility more than 6 miles, scattered clouds at 21,000 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 CMI 6:18 pm CDT (23:18 UTC), at XNA 6:45 pm CDT (23:45 UTC) (civil twilight ends 7:11 pm CDT (00:11 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: University Of Illinois/Willard Airport, Northwest Arkansas Ntl Airport.