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Weather Decoding

Reading a METAR

6 min read๐ŸŸขBeginner

Example:

EGPK 051320Z 26015G25KT 9999 -RA FEW025 BKN040 12/08 Q1013 NOSIG

Fields left-to-right

  • EGPK โ€” ICAO code
  • 051320Z โ€” issued on the 5th of the month, 1320 UTC (Zulu time)
  • 26015G25KT โ€” wind from 260ยฐ, 15 knots, gusting 25
  • 9999 โ€” visibility 10 km or more
  • -RA โ€” light rain
  • FEW025 โ€” few clouds (1โ€“2 oktas) at 2,500 ft AGL
  • BKN040 โ€” broken clouds (5โ€“7 oktas) at 4,000 ft AGL
  • 12/08 โ€” temperature 12ยฐC, dewpoint 8ยฐC (close = risk of fog/low cloud)
  • Q1013 โ€” QNH 1013 hPa
  • NOSIG โ€” no significant change expected

Why it matters for spotters

  • Cloud base tells you whether pictures will be against a grey sky or blue
  • Wind tells you the active runway
  • Visibility tells you how far out you'll see the lights of a landing aircraft
  • Temp/dew spread tells you if fog is about to kill your visibility

Try it

The live METAR is on /weather โ€” read it, predict the runway, then check the /radar view to see if you were right.