Czech Hydrometeorological Institute

 current conditions in Czech Republic - hourly

 weather in Europe - every 6 hours

 weather in the world - every 12 hours

snow reports from the ski resorts in Czech Republic  

 snow reports from the ski resorts in Europe   

 ozone and UV-B measurement reports  

 recent upper air data and recent data of the surface measurements from Praha-Libuš

 recent upper air data from Brno-Sokolnice

 real radar data - hourly (in emergency every 10 minutes)

 lightening detection systems

 actual satellite images from NOAA satellite - sporadically, about 10 times a day

 real-time geostacionary satellite images from Meteosat - every 30 minutes

 extremes from Praha-Klementinum, time of sunrise, sunset, moonrise and moonset