KeepBlueUp

METAR and TAF decoder

Look up a station or paste a raw report - get the flight category, the forecast, and a plain-English decode. New to the forecast code? How to read a TAF.

Try:
Or paste a raw METAR or TAF
MVFREGLL

Marginal VFR - reduced ceiling and/or visibility.Day 12 · 17:50 UTC

Plain English

  • Routine report (METAR) for EGLL, observed on day 12 at 17:50 UTC.
  • Wind from 210 degrees at 14 kt, gusting 24 kt.
  • Visibility 6000 metres.
  • Weather: light rain.
  • Broken clouds at 1200 ft AGL.
  • Overcast clouds at 2000 ft AGL.
  • Temperature 14 degC, dew point 12 degC.
  • QNH 1003 hPa.
  • Ceiling 1200 ft AGL. Flight category: MVFR.

Forecast - TAF EGLL

Sample

This is a forecast for future periods, not the weather now. It never affects the flight category above. Each period below carries its own forecast category, scoped to the times shown with it.

Valid from day 12 18:00Z to day 13 24:00Z.Issued day 12 at 16:58 UTC.

  • BASEFrom the start of the forecast until day 13 02:00ZForecast: MVFR

    The conditions expected from the start of the validity period until the first FM group changes them.

    • Wind from 210 degrees at 14 kt.
    • Visibility 6000 metres.
    • Weather: light rain.
    • Broken clouds at 1200 ft AGL.
    • Ceiling 1200 ft AGL. Forecast flight category for this period: MVFR.
  • BECMGday 12 20:00Z to day 12 22:00ZForecast: MVFR

    A GRADUAL change: the stated values are reached at some point inside this window and then persist. Elements not restated carry on unchanged.

    • Wind from 240 degrees at 10 kt.
    • Visibility 10 km or more.
    • NSW: significant weather is forecast to end.
    • Broken clouds at 2500 ft AGL.
    • Ceiling 2500 ft AGL. Forecast flight category for this period: MVFR.
  • FMFrom day 13 02:00Z until day 13 24:00ZForecast: VFR

    SUPERSEDES everything before it. From this time the whole forecast is the line below - wind, visibility, weather and cloud are all restated.

    • Wind from 270 degrees at 8 kt.
    • Visibility 10 km or more.
    • Scattered clouds at 3500 ft AGL.
    • No ceiling forecast. Forecast flight category for this period: VFR.
  • TEMPOday 13 02:00Z to day 13 08:00ZForecast: IFR

    INTERMITTENT fluctuations, each lasting under an hour and together less than half this window. The prevailing forecast still applies the rest of the time.

    • Wind from 270 degrees at 8 kt (unchanged from earlier in this forecast).
    • Visibility 3000 metres.
    • Weather: mist.
    • Broken clouds at 600 ft AGL.
    • Ceiling 600 ft AGL. Forecast flight category for this period: IFR.
  • PROB30 TEMPOday 13 06:00Z to day 13 10:00ZForecast: LIFR

    30 percent probability. A PROBABILITY that TEMPORARY fluctuations to these conditions occur in this window. Two hedges stacked: it may not happen, and if it does it is intermittent.

    • Wind from 270 degrees at 8 kt (unchanged from earlier in this forecast).
    • Visibility 800 metres.
    • Weather: fog.
    • Vertical visibility 200 ft (sky obscured).
    • Ceiling 200 ft AGL. Forecast flight category for this period: LIFR.

Raw report

METAR EGLL 121750Z 21014G24KT 6000 -RA BKN012 OVC020 14/12 Q1003
TAF EGLL 121658Z 1218/1324 21014KT 6000 -RA BKN012 BECMG 1220/1222 24010KT 9999 NSW BKN025 FM130200 27008KT 9999 SCT035 TEMPO 1302/1308 3000 BR BKN006 PROB30 TEMPO 1306/1310 0800 FG VV002

Safety notice. KeepBlueUp is a planning and training aid, not an official source. It is not an approved or certified electronic flight bag, and it is not a substitute for the POH/AFM, the current weight-and-balance record for the aircraft you are flying, current charts, or an official weather briefing. No output here authorises a flight. As pilot in command you remain solely responsible for verifying every figure against official sources (14 CFR 91.3 and 91.103; EASA Part-NCO). Full terms.

KeepBlueUp is operated by Gaperi Consult S.R.L., Brasov, Romania - company details. Built on Gaperi. Build 25787a2 · 2026-10-12 - corrections log.

Cessna and Skyhawk are trademarks of Textron Aviation Inc.; other aircraft names are trademarks of their respective owners. KeepBlueUp is an independent tool and is not affiliated with, endorsed, sponsored or approved by any aircraft manufacturer or aviation authority.