Green Bay/Austin Straubel International to Laguardia Airport GRB → LGA
667 nautical miles (767 statute miles) east on a straight line, true course 105°, about 107° magnetic at the departure end (variation 2W). At 120 knots that is 3 h 53 min at the quickest height in today's winds (39,000 ft, a 52-knot tailwind), arriving about 7:55 am EDT (11:55 UTC). 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 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 129 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 last 488 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 438 to 597 nm out.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. 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 GRB.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
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 6 forecast points nearest it (GRB, TVC, CLE, BUF, AVP, JFK). 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 | 270° at 13 kt | −12 kt | 132 kt | 5 h 03 min | 9:05 am EDT (13:05 UTC) | |
| 5,500 ft | 310° at 12 kt | −11 kt | 131 kt | 5 h 05 min | 9:07 am EDT (13:07 UTC) | |
| 7,500 ft | 310° at 13 kt | −12 kt | 10 °C | 132 kt | 5 h 03 min | 9:05 am EDT (13:05 UTC) |
| 9,500 ft | 300° at 13 kt | −13 kt | 7 °C | 133 kt | 5 h 01 min | 9:03 am EDT (13:03 UTC) |
| 11,500 ft | 290° at 12 kt | −12 kt | 4 °C | 132 kt | 5 h 03 min | 9:05 am EDT (13:05 UTC) |
| 13,500 ft | 290° at 14 kt | −14 kt | 0 °C | 134 kt | 4 h 59 min | 9:01 am EDT (13:01 UTC) |
| 15,500 ft | 290° at 18 kt | −17 kt | -5 °C | 137 kt | 4 h 52 min | 8:54 am EDT (12:54 UTC) |
| 17,500 ft | 300° at 21 kt | −21 kt | -9 °C | 141 kt | 4 h 44 min | 8:46 am EDT (12:46 UTC) |
| 18,000 ft FL180 | 300° at 22 kt | −21 kt | -10 °C | 141 kt | 4 h 44 min | 8:46 am EDT (12:46 UTC) |
| 24,000 ft FL240 | 290° at 28 kt | −27 kt | -22 °C | 147 kt | 4 h 32 min | 8:34 am EDT (12:34 UTC) |
| 30,000 ft FL300 | 300° at 38 kt | −37 kt | -37 °C | 157 kt | 4 h 15 min | 8:17 am EDT (12:17 UTC) |
| 34,000 ft FL340 | 290° at 41 kt | −39 kt | -44 °C | 159 kt | 4 h 12 min | 8:14 am EDT (12:14 UTC) |
| 39,000 ft FL390 | 290° at 53 kt | −52 kt | -51 °C | 172 kt | 3 h 53 min | 7:55 am EDT (11:55 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° |
| TVC | used from 50 nm out; 51 nm from the line | 260/31 | 280/22 15° | 290/18 10° | 270/13 2° | 290/25 -10° | 300/35 -21° | 310/52 -37° | 320/59 -47° | 300/84 -54° |
| CLE | used from 249 nm out; 107 nm from the line | 340/7 | 010/16 13° | 350/18 8° | 350/20 3° | 340/31 -10° | 340/46 -21° | 340/54 -37° | 330/62 -44° | 340/65 -49° |
| BUF | used from 348 nm out; 57 nm from the line | 320/10 | 010/16 10° | 360/10 6° | 340/13 2° | 330/22 -11° | 300/25 -23° | 320/31 -38° | 300/29 -44° | 280/36 -50° |
| AVP | used from 498 nm out; 54 nm from the line | 150/5 | 350/13 12° | 270/20 8° | 260/17 4° | 260/25 -11° | 240/31 -22° | 240/54 -35° | 230/61 -41° | 240/55 -49° |
| JFK | used from 647 nm out; 18 nm from the line | 250/18 | 250/23 14° | 240/33 9° | 240/33 4° | 240/38 -10° | 240/45 -21° | 230/86 -32° | 230/102 -40° | 230/84 -51° |
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 | no report just now | 695 ft | ||||
| MTW Manitowoc, WI | 20 nm out, 16 nm south of the line | no report just now | 650 ft | ||||
| MBL Manistee, MI | 80 nm out, 9 nm northeast of the line | no report just now | 621 ft | ||||
| MBS Saginaw, MI | 179 nm out, 8 nm south of the line, tower | no report just now | 668 ft | ||||
| CFS Caro, MI | 209 nm out, 4 nm southeast of the line | no report just now | 704 ft | ||||
| CYQS St Thomas, | 319 nm out, 10 nm south of the line | no report just now | 776 ft | ||||
| OLE Olean, NY | 448 nm out, 3 nm north of the line | no report just now | 2,135 ft | ||||
| ELM Elmira/Corning, NY | 508 nm out, 23 nm northeast of the line, tower | no report just now | 955 ft | ||||
| AVP Wilkes-Barre/Scranton, PA | 577 nm out, 3 nm southwest of the line, tower | no report just now | 961 ft | ||||
| CDW Caldwell, NJ | 647 nm out, 2 nm south of the line, tower | no report just now | 172 ft | ||||
| LGA New York, NY | destination | no report just now | 20 ft |
The highest airport on this list sits at 2,135 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At LGA when you get there the forecast at the estimated arrival, 7:55 am EDT (11:55 UTC)
LGA has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 5/2811 NEW YORK, NY, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local 4 nm from the route, at the destination end · security · until 20 October · ZNY
Daylight
Sunset at GRB 6:13 pm CDT (23:13 UTC), at LGA 6:20 pm EDT (22:20 UTC) (civil twilight ends 6:47 pm EDT (22:47 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, Laguardia Airport.