Bad weather damages crops and hits the vegetable market, as a rainy 2000 summer and low carryovers spelt bad news for the 2001 vegetable season. And there's more to come, says Mark Cobb of Icefresh, the frozen food specialists.  Dramatic weather conditions have resulted in some crops yielding 15 to 20% of usual tonnages.  Heavy rains hit Northern Europe and southern area had to face outstanding variations in temperatures.  Significant downturn in Eastern Europe (Poland) is also expected and being blamed on the poor weather during the growing period.