The improved Grom-class destroyers of 1939 were the third and fourth planned ships of the Grom class of destroyers ordered for the Polish Navy shortly before World War II. They were to be built in Poland, the first destroyers so constructed, and were to be named Huragan ("hurricane") and Orkan ("windstorm"), respectively. Their design included greater power and displacement than the first two ships of the class. Their construction was interrupted by the beginning of World War II and they were never completed.