Bordei-Ion, E. (National Institute of Meteorology and Hydrology, Bucharest, Romania)
Jude, O. (same affiliation)
Cordoneanu, E. (same affiliation)
Dima, V. (same affiliation)
Petrescu, M. (Weather Forecast Centre, Constanta, Romania)
Between 1960 and 1996 several mediterrenean cyclons with sudden deviation from South to North separated from the initial transbalcanic trajectories: 2a, 2b or 4a. Among then, 31 were studied for the period 1960-1978 (in an anterior step) and 26 were recently studied for the period 1979-1996. The numeric difference between them is explained in the detail in the work.
All these cyclons crossed the Eastern regions of Romania and Republic of Moldova from South to North looking for the occlusion point above Poland and Transcarpathic Ukraine. Perhaps their number is small reported to the study interval, but the mechanism of the severe deviation, with almost 90 deg. North as against the initial trajectories and from which they even passed almost 75%, is interesting enough as to be taken into account by teh researchers in this area of Europe (especially because they bring precipitations where they are cronically missing).
Of course, we could not always regard them as standards, as "classics", as triumphs of our knowledge. All that we have left is to understand the reasons of the trajectories "heresy".
Then, to wait for them in our forecast operative activity as ingenios proofs of the nature's escape from the researchers' standards ... unless we have just created one more!