Wednesday, May 20, 2009

Birds on radar

While satellite in visible (EUMETSAT) shows clear skies (top image), radar shows plenty of echoes from birds and insects after the Sun rise (bottom); no, it wasn't dust. The south-eastern radar of Romania, with big lakes and the Danube Delta, has a lot of "noise" during summer, but sometimes we can easily monitor low level circulations due to these tracers. Well, sometimes birds can mislead the forecaster !

Tuesday, May 12, 2009

Gust front

The red arrow points toward an outflow from a convective cell. The thin line is the leading edge of the diverging outflow, it is called "gust front".

(visible channel, satellite images, 15 minutes apart - EUMETSAT- northern part of Moldova - Romania)