
An increasing number of AWSs at airports are fitted with instruments to measure horizontal visibility and cloud amounts and base heights, so any sudden reduction in visibility or cloud base may generate a SPECI as well.SPECIs are sent to report heavy rain, sudden increase or direction change of wind, strong gusts, or sudden temperature variations.


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The METAR code is managed by the World Meteorological Organisation ( WMO).METAR appears to be an abbreviation of MÉTéorologique Aviation Régulière and is a report designed for aviation from an Automatic Weather Station ( AWS) or manned station. These two terms will come up often, so it's best to get them sorted at the start. What is the difference between METAR and SYNOP data: Australian data - from Australian Weather News.Australian data - from the Bureau of Meteorology.Here are some notes and links to help Australian DA users.
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Visit Tim's site at Weather Graphics, or participate in the Weather Graphics Forum where you'll find many like-minded people from around the globe who use DA to satisfy their fascination with weather, or in connection with their professional or recreational activities. Program for plotting and analysing real-time raw weather data freely available If you're really interested in the weather, grab a copy of Digital Atmosphere (DA) and begin exploring.Ītmosphere is Tim Vasquez's excellent and inexpensive

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