Runways at EGLM
According to OurAirports data (compiled from AIP and FAA sources), White Waltham Airfield (Maidenhead, Berkshire) has 4 runways: 03/21 - 1,025 m long (3,363 ft), 45 m wide, grass surface; 07L/25R - 1,110 m long (3,642 ft), 45 m wide, grass surface; 07R/25L - 788 m long (2,585 ft), 25 m wide, grass surface; 11/29 - 930 m long (3,051 ft), 30 m wide, grass surface.
The longest of them is 07L/25R, at 1,110 m.
All runways have a grass surface, which distinguishes this site from airports with a paved runway.
Runway headings and wind
The thresholds are oriented as follows: 03/21 on 30° and 210° magnetic, 07L/25R on 70° and 250° magnetic, 07R/25L on 70° and 250° magnetic, 11/29 on 110° and 290° magnetic. A threshold designator is its magnetic heading divided by ten (ICAO Annex 14), so the runway axis can be read straight off the numbers.
For the 03/21 axis, wind from the south-east (around 120°) or from the north-west (around 300°) blows perpendicular to the runway and produces the largest crosswind component. Wind from around 30° or 210° acts along the runway, as a headwind or a tailwind. The decoder on this page computes those components automatically from the current METAR.
METAR and TAF for EGLM
Weather reports for White Waltham Airfield (Maidenhead, Berkshire) are published under the ICAO code EGLM. A METAR is an observation of current conditions, usually issued every 30 or 60 minutes; a TAF is a forecast for the airport area, typically covering 9 to 30 hours.
The decoder breaks the EGLM report down into its parts: wind direction and speed including gusts and variability, visibility (including CAVOK and directional minimum visibility), weather phenomena by WMO code, cloud layers with their bases, temperature and dew point, QNH pressure, and the resulting flight category - VFR, MVFR, IFR or LIFR - using FAA thresholds.
Not every airport issues its own reports; many smaller airfields have no weather station. If no current data is available for EGLM, check the nearby airports listed below.
Reports always use UTC (the Z suffix). The Europe/London zone is GMT+00:00 in winter and GMT+01:00 in summer - that is the shift to apply to the time in the report to get local time at the airport.
The closest airports in the database, measured in a straight line from the reference point, are Wycombe Air Park (Marlow, Buckinghamshire) (EGTB, 13 km), Blackbushe Airport (Camberley, Surrey) (EGLK, 20 km), Denham Aerodrome (Uxbridge, Greater London) (EGLD, 21 km). When no report is available for EGLM, they usually give the best approximation of conditions in the area.
