How to read a METAR without decoding it in your head
The seven part order that never changes, a worked example, and the five traps that catch pilots on checkrides and in real weather.
Every METAR reads in the same fixed order: station, date and time, wind, visibility, present weather, clouds, temperature and dew point, altimeter, then remarks. Learn the order once and you stop decoding and start reading.
A METAR is a surface weather observation, issued around 55 minutes past each hour (plus SPECI reports when things change fast). The format looks hostile because it was built for teletypes, but it is rigid, and rigidity is your friend: nothing ever appears out of sequence. Your eyes learn to jump to the group you need.
The seven groups, in order
- Station. KLVK: the ICAO identifier (Livermore).
- Date and time. 291753Z: the 29th at 17:53 UTC. Always Zulu, never local.
- Wind. 25012G18KT: from 250° true at 12 knots, gusting 18. VRB means variable direction; 00000KT is calm.
- Visibility. 10SM: ten statute miles. In US reports "10SM" means ten or more; it never reads higher.
- Clouds. FEW035: a few clouds at 3,500 ft AGL. Coverage runs FEW, SCT, BKN, OVC in eighths of sky; the height is hundreds of feet.
- Temperature and dew point. 24/12: 24 °C over a 12 °C dew point. An M prefix (M04) means minus.
- Altimeter. A2992: 29.92 inHg. Set it and your altimeter reads field elevation on the ground.
Everything after RMK is remarks: sensor type (AO2), sea level pressure (SLP132), precise temperatures (T02440122), peak winds, and the like. Useful, skippable on a first pass.
What makes a ceiling, and what makes it IFR?
A ceiling is the lowest broken (BKN) or overcast (OVC) layer, or vertical visibility (VV). FEW and SCT layers are not ceilings.
Flight categories combine that ceiling with visibility: VFR is a ceiling above 3,000 ft and visibility above 5 SM; MVFR runs 1,000 to 3,000 ft or 3 to 5 SM; IFR runs 500 to below 1,000 ft or 1 to below 3 SM; LIFR is anything below 500 ft or 1 SM. The category chip on every SkyReady airport page is computed exactly this way from the live report.
The five traps
The classic METAR mistakes are reading Zulu as local time, reading °C as °F, mixing up true and magnetic wind, treating scattered clouds as a ceiling, and forgetting that "10SM" is a floor, not a measurement.
- Zulu time. 1753Z is morning in California and evening in Berlin. Convert before you judge how fresh the report is.
- Celsius. 24/12 is a warm day, not a freezing one. Density altitude math also wants °C.
- True vs magnetic. Written METARs use true north; the tower and ATIS speak magnetic. Near big magnetic variation that difference moves your crosswind math.
- FEW and SCT are not ceilings. SCT008 looks scary but it is legal VFR if visibility holds; BKN008 is IFR.
- "10SM" means 10 or more. US METARs never report higher than ten statute miles, so a crystal clear 60 mile day still reads 10SM.
Read the raw text anyway
Decoders are everywhere, including ours, and every SkyReady airport page translates the live METAR into plain English next to your personal minimums. So why learn the raw format? Because the checkride requires it, ATIS gives you no decoder at 110 knots, and the raw text is the only version with everything in it. The honest workflow: read the raw string, check yourself against the decoded view, and after a few weeks the decoder becomes the backup.
METAR FAQ
How often does a METAR update?
Hourly, typically observed around 47 to 55 past the hour, plus SPECI special reports whenever conditions cross a category threshold, wind shifts sharply, or a thunderstorm arrives.
What is the difference between a METAR and a TAF?
A METAR is what the station observes now; a TAF is a forecast for the airport's immediate area, usually 24 to 30 hours ahead, issued four times daily. The decoding vocabulary is nearly identical, so learning one teaches the other.
What does AUTO mean?
The report came from automated sensors with no human augmentation. Sensor limits apply: an automated station cannot see distant thunderstorms and may read fog as an overcast layer.
Sources: FAA Aviation Weather Handbook (FAA-H-8083-28), ch. 24; AIM 7-1-28; Federal Meteorological Handbook No. 1 (FMH-1). Educational material; brief the current report, not an example.