Green Bay/Austin Straubel International to Hartsfield/Jackson Atlanta International GRB → ATL
674 nautical miles (775 statute miles) south on a straight line, true course 164°, about 166° magnetic at the departure end (variation 2W). At 120 knots that is 3 h 55 min at the quickest height in today's winds (34,000 ft, a 52-knot tailwind), arriving about 8:03 am EDT (12:03 UTC). Right now GRB is VFR, wind from the south-southwest (210°) at 3 knots; ATL is VFR, wind from the northwest (310°) 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: 718 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 30 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, fog). Over the route from 357 to 614 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 565 to 614 nm out.
- 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 614 to 614 nm out.
- AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 10,000 ft. Over the route from 624 to 644 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 GRB.
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 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 9 forecast points nearest it (GRB, MKG, JOT, FWA, IND, LOU, BNA, TYS, ATL). 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 | 300° at 19 kt | −13 kt | 133 kt | 5 h 04 min | 9:12 am EDT (13:12 UTC) | |
| 5,500 ft | 310° at 20 kt | −17 kt | 137 kt | 4 h 55 min | 9:03 am EDT (13:03 UTC) | |
| 7,500 ft | 320° at 21 kt | −20 kt | 12 °C | 140 kt | 4 h 49 min | 8:57 am EDT (12:57 UTC) |
| 9,500 ft | 330° at 22 kt | −21 kt | 9 °C | 141 kt | 4 h 47 min | 8:55 am EDT (12:55 UTC) |
| 11,500 ft | 330° at 19 kt | −18 kt | 5 °C | 138 kt | 4 h 53 min | 9:01 am EDT (13:01 UTC) |
| 13,500 ft | 320° at 20 kt | −19 kt | 1 °C | 139 kt | 4 h 51 min | 8:59 am EDT (12:59 UTC) |
| 15,500 ft | 320° at 23 kt | −21 kt | -3 °C | 141 kt | 4 h 47 min | 8:55 am EDT (12:55 UTC) |
| 17,500 ft | 310° at 26 kt | −22 kt | -6 °C | 142 kt | 4 h 45 min | 8:53 am EDT (12:53 UTC) |
| 18,000 ft FL180 | 310° at 27 kt | −23 kt | -7 °C | 143 kt | 4 h 43 min | 8:51 am EDT (12:51 UTC) |
| 24,000 ft FL240 | 320° at 32 kt | −28 kt | -19 °C | 148 kt | 4 h 33 min | 8:41 am EDT (12:41 UTC) |
| 30,000 ft FL300 | 320° at 48 kt | −46 kt | -34 °C | 166 kt | 4 h 04 min | 8:12 am EDT (12:12 UTC) |
| 34,000 ft FL340 | 320° at 57 kt | −52 kt | -42 °C | 172 kt | 3 h 55 min | 8:03 am EDT (12:03 UTC) |
| 39,000 ft FL390 | 320° at 53 kt | −47 kt | -50 °C | 167 kt | 4 h 02 min | 8:10 am EDT (12:10 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| GRB | used from 0 nm out; 25 nm from the line | 250/36 | 270/23 16° | 270/14 9° | 240/18 4° | 280/26 -9° | 280/29 -20° | 290/42 -36° | 290/51 -45° | 290/72 -55° |
| MKG | used from 50 nm out; 63 nm from the line | 260/22 | 290/16 15° | 300/11 10° | 290/5 3° | 300/26 -9° | 300/32 -20° | 320/48 -36° | 320/61 -45° | 310/74 -53° |
| JOT | used from 149 nm out; 51 nm from the line | 250/23 | 270/22 15° | 250/16 10° | 240/9 4° | 280/22 -7° | 280/29 -19° | 300/29 -34° | 290/50 -43° | 300/64 -52° |
| FWA | used from 198 nm out; 72 nm from the line | 300/17 | 320/20 16° | 330/20 10° | 340/15 3° | 310/27 -8° | 320/37 -20° | 330/52 -36° | 330/65 -43° | 330/60 -50° |
| IND | used from 248 nm out; 25 nm from the line | 290/16 | 310/20 16° | 320/21 10° | 330/13 3° | 300/25 -7° | 320/32 -19° | 330/46 -34° | 320/61 -43° | 320/63 -50° |
| LOU | used from 347 nm out; 22 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° |
| BNA | used from 446 nm out; 77 nm from the line | 310/20 | 340/20 17° | 330/24 10° | 340/22 5° | 330/26 -6° | 340/29 -18° | 330/52 -33° | 320/62 -41° | 340/45 -50° |
| TYS | used from 495 nm out; 60 nm from the line | 320/20 | 340/18 11° | 340/32 9° | 340/36 4° | 330/37 -7° | 330/38 -19° | 330/50 -34° | 330/53 -38° | 330/44 -48° |
| ATL | used from 594 nm out; 54 nm from the line | 320/30 | 330/37 16° | 340/44 11° | 330/35 7° | 310/33 -6° | 300/38 -18° | 330/58 -33° | 330/48 -40° | 320/34 -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 |
|---|---|---|---|---|---|---|---|
| GRB Green Bay, WI | departure | VFR | from the south-southwest (210°) at 3 knots | 10+ mi | none | 695 ft | 2:53 am CDT (07:53 UTC) |
| SBM Sheboygan, WI | 40 nm out, 5 nm south of the line | VFR | from the southwest (230°) at 8 knots | 10+ mi | none | 755 ft | 07:53 UTC |
| MKE Milwaukee, WI | 89 nm out, 16 nm southwest of the line, tower | VFR Sky: overcast at 25,000 feet | from the southwest (220°) at 11 knots | 10+ mi | 25,000 ft | 728 ft | 07:52 UTC |
| GYY Gary/Chicago, IN | 178 nm out, 17 nm west of the line, tower | VFR | from the south (190°) at 5 knots | 10+ mi | none | 596 ft | 07:55 UTC |
| LAF Lafayette, IN | 248 nm out, 15 nm southwest of the line, tower | marginal VFR Weather: mist | calm | 3 mi | none | 605 ft | 08:03 UTC |
| IND Indianapolis, IN | 297 nm out, 3 nm east of the line, tower | marginal VFR Sky: scattered clouds at 400 feet Weather: mist | calm | 3 mi | none | 796 ft | 07:59 UTC |
| SDF Louisville, KY | 396 nm out, 5 nm northeast of the line, tower | marginal VFR Weather: mist | calm | 3 mi | none | 500 ft | 07:56 UTC |
| BRY Bardstown, KY | 416 nm out, 10 nm east of the line | low IFR Sky: sky obscured at 100 feet Weather: fog | calm | 0.25 mi | 100 ft | 669 ft | 07:55 UTC |
| CSV Crossville, TN | 535 nm out, 4 nm north of the line | low IFR Sky: sky obscured at 200 feet Weather: fog | calm | 0.25 mi | 200 ft | 1,881 ft | 07:53 UTC |
| CHA Chattanooga, TN | 584 nm out, 17 nm west of the line, tower | VFR Weather: light rain | calm | 10+ mi | none | 682 ft | 07:53 UTC |
| RYY Atlanta, GA | 654 nm out, 5 nm northwest of the line, tower | VFR | from the west-northwest (290°) at 6 knots | 10+ mi | none | 1,040 ft | 07:50 UTC |
| ATL Atlanta, GA | destination | VFR | from the northwest (310°) at 6 knots | 10+ mi | none | 1,026 ft | 3:52 am EDT (07:52 UTC) |
The highest airport on this list sits at 1,881 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At ATL when you get there the forecast at the estimated arrival, 8:03 am EDT (12:03 UTC)
Wind from the northwest at 6 knots, visibility more than 6 miles, clear skies VFR
The whole forecast for ATL
- From Mon 4:00 am EDT (08:00 UTC): wind from the northwest at 6 knots, visibility more than 6 miles, clear skies
- From Mon 12:00 pm EDT (16:00 UTC): wind from the northwest at 10 knots, gusting to 20, visibility more than 6 miles, clear skies
- From Mon 5:00 pm EDT (21:00 UTC): wind from the northwest at 7 knots, visibility more than 6 miles, clear skies
The forecast for GRB, the departure
- 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 broken layer at 25,000 feet
- From Mon 5:00 am CDT (10:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, a broken layer at 20,000 feet
- From Mon 11:00 am CDT (16:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, clear skies
- From Mon 5:00 pm CDT (22:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, scattered clouds at 15,000 feet
- 30% chance between Mon 6:00 pm CDT (23:00 UTC) and 10:00 pm CDT (03:00 UTC): light rain showers, a broken layer at 6,000 feet
- From Mon 10:00 pm CDT (03:00 UTC): wind from the east-southeast at 4 knots, visibility more than 6 miles, scattered clouds at 2,000 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 GRB 6:13 pm CDT (23:13 UTC), at ATL 7:07 pm EDT (23:07 UTC) (civil twilight ends 7:32 pm EDT (23:32 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: Green Bay/Austin Straubel International, Hartsfield/Jackson Atlanta International.