Gulfport-Biloxi International to Harrisburg International GPT → MDT
840 nautical miles (967 statute miles) northeast on a straight line, true course 042°, about 044° magnetic at the departure end (variation 2W). At 120 knots that is 7 h 11 min at the quickest height in today's winds (3,500 ft, a 3-knot headwind), arriving about 12:56 pm EDT (16:56 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 SIERRA 1E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, mist, fog). Near the route, at the departure end.
- AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Over the route from 326 to 821 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 336 to 534 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 366 to 801 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, fog). Over the last 465 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 33,000 ft. Over the last 10 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 GPT.
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 08:00–15:00 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 (MOB, MGM, BHM, ATL, TYS, TRI, ROA, EKN, PSB). 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 | 320° at 20 kt | +3 kt | 117 kt | 7 h 11 min | 12:56 pm EDT (16:56 UTC) | |
| 5,500 ft | 340° at 21 kt | +9 kt | 11 °C | 111 kt | 7 h 34 min | 1:19 pm EDT (17:19 UTC) |
| 7,500 ft | 350° at 24 kt | +12 kt | 12 °C | 108 kt | 7 h 47 min | 1:32 pm EDT (17:32 UTC) |
| 9,500 ft | 350° at 26 kt | +14 kt | 8 °C | 106 kt | 7 h 55 min | 1:40 pm EDT (17:40 UTC) |
| 11,500 ft | 350° at 23 kt | +11 kt | 5 °C | 109 kt | 7 h 42 min | 1:27 pm EDT (17:27 UTC) |
| 13,500 ft | 340° at 24 kt | +11 kt | 1 °C | 109 kt | 7 h 42 min | 1:27 pm EDT (17:27 UTC) |
| 15,500 ft | 340° at 27 kt | +11 kt | -2 °C | 109 kt | 7 h 42 min | 1:27 pm EDT (17:27 UTC) |
| 17,500 ft | 340° at 30 kt | +11 kt | -6 °C | 109 kt | 7 h 42 min | 1:27 pm EDT (17:27 UTC) |
| 18,000 ft FL180 | 340° at 31 kt | +11 kt | -7 °C | 109 kt | 7 h 42 min | 1:27 pm EDT (17:27 UTC) |
| 24,000 ft FL240 | 340° at 36 kt | +16 kt | -19 °C | 104 kt | 8 h 05 min | 1:50 pm EDT (17:50 UTC) |
| 30,000 ft FL300 | 340° at 47 kt | +19 kt | -33 °C | 101 kt | 8 h 19 min | 2:04 pm EDT (18:04 UTC) |
| 34,000 ft FL340 | 340° at 53 kt | +21 kt | -41 °C | 99 kt | 8 h 29 min | 2:14 pm EDT (18:14 UTC) |
| 39,000 ft FL390 | 330° at 36 kt | +11 kt | -51 °C | 109 kt | 7 h 42 min | 1:27 pm EDT (17:27 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| MOB | used from 0 nm out; 26 nm from the line | L/V | L/V 18° | 020/8 11° | L/V 6° | 330/12 -5° | 330/23 -17° | 330/30 -32° | 350/39 -41° | 340/40 -53° |
| MGM | used from 99 nm out; 58 nm from the line | 320/19 | 330/16 17° | 340/21 11° | 330/11 5° | 330/27 -6° | 330/21 -17° | 330/37 -32° | 340/44 -40° | 360/30 -52° |
| BHM | used from 198 nm out; 43 nm from the line | 310/19 | 310/15 16° | 320/19 11° | 330/15 5° | 330/23 -5° | 320/14 -18° | 320/36 -32° | 330/44 -40° | 340/36 -51° |
| ATL | used from 247 nm out; 49 nm from the line | 330/32 | 340/36 17° | 350/34 10° | 340/25 6° | 330/27 -6° | 350/35 -18° | 330/49 -32° | 340/47 -41° | 340/27 -51° |
| TYS | used from 346 nm out; 56 nm from the line | 330/16 | 350/32 14° | 350/37 9° | 340/30 5° | 330/28 -6° | 340/36 -19° | 330/40 -33° | 330/51 -41° | 330/36 -51° |
| TRI | used from 445 nm out; 28 nm from the line | 340/25 11° | 350/37 9° | 350/34 6° | 340/39 -7° | 340/43 -19° | 340/55 -32° | 330/58 -42° | 320/37 -50° | |
| ROA | used from 544 nm out; 54 nm from the line | 310/32 | 340/32 14° | 350/25 9° | 340/24 3° | 340/42 -8° | 340/52 -20° | 350/62 -34° | 350/64 -39° | 310/44 -48° |
| EKN | used from 643 nm out; 39 nm from the line | 330/20 10° | 350/29 7° | 340/32 2° | 340/44 -8° | 350/50 -21° | 350/63 -35° | 340/69 -40° | 330/42 -50° | |
| PSB | used from 742 nm out; 90 nm from the line | 020/21 12° | 360/28 7° | 360/29 1° | 350/33 -10° | 350/42 -22° | 350/49 -37° | 340/63 -43° | 350/39 -52° |
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 |
|---|---|---|---|---|---|---|---|
| GPT Gulfport, MS | departure | no report just now | 28 ft | ||||
| PQL Pascagoula, MS | 20 nm out, 18 nm southeast of the line, tower | no report just now | 16 ft | ||||
| SEM Selma, AL | 158 nm out, 1 nm west of the line, tower | no report just now | 166 ft | ||||
| MGM Montgomery, AL | 178 nm out, 23 nm southeast of the line, tower | no report just now | 221 ft | ||||
| RYY Atlanta, GA | 316 nm out, 16 nm southeast of the line, tower | no report just now | 1,040 ft | ||||
| DZJ Blairsville, GA | 366 nm out, 4 nm northeast of the line | no report just now | 1,906 ft | ||||
| TRI Bristol/Johnson/Kingsport, TN | 494 nm out, 14 nm northwest of the line, tower | no report just now | 1,518 ft | ||||
| MKJ Marion/Wytheville, VA | 544 nm out, 5 nm east of the line | no report just now | 2,558 ft | ||||
| LWB Lewisburg, WV | 623 nm out, 8 nm northwest of the line, tower | no report just now | 2,301 ft | ||||
| OKV Winchester, VA | 751 nm out, 6 nm southeast of the line | no report just now | 726 ft | ||||
| MRB Martinsburg, WV | 771 nm out, 5 nm southwest of the line, tower | no report just now | 564 ft | ||||
| MDT Harrisburg, PA | destination | no report just now | 310 ft |
The highest airport on this list sits at 2,558 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At MDT when you get there the forecast at the estimated arrival, 12:56 pm EDT (16:56 UTC)
MDT has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 4/9383 WASHINGTON, DC., USA 23 nm from the route, 781 nm along the route · security · ZDC
Daylight
Sunset at GPT 6:28 pm CDT (23:28 UTC), at MDT 6:32 pm EDT (22:32 UTC) (civil twilight ends 6:59 pm EDT (22:59 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: Gulfport-Biloxi International, Harrisburg International.