i read on noaa that portions of moshannon state forest received between 5 and 7 inches of rainfall in a very short period of time, like 4-5 hours on thursday. Apparently this created extreme flash flooding in some areas.I remember reading in one of charlie mecks books that something like this happened on Bob's creek and Wills creek on the same day in the 1980's and it totally changed the stream by scouring out the streambed of debris, macros and even some fish. They both came back, but i guess it took a while. Bobs and Wills are very different streams than the ones in Moshannon, so im not sure if this type of event will negatively effect anything up in Moshannon, but that much rain falling in one event is unusual in itself, let alone falling in 4 to 5 hours. One good thing is the majority of the watersheds up there are over 90% forested, so flash flooding would be more limited than a more developed watershed.