A numerical weather forecast ETA model is run at our department - see here.

Some resources on Czech weather:

Czech Republic current weather conditions (CHMI)
Libus - online measurements from Prague-Libuš
Soundings from Prague-Libuš (CHMI)
Soundings from Brno-Sokolnice (CHMI)
Recent Radar Data from the area of the Czech Republic (CHMI)
NOAA satellite images (CHMI)
Meteosat satellite images (CHMI)
Lightnings detection system (CHMI)
Several weather forecasts at CHMI
Weather forecast at Meteopress

Weather portals

Westwind - European weather & forecasts
Wetterzentrale
WxUSA Weather Hub