From Island no.10.
Mobile. April 4.
--A special dispatch to the New Orleans Picayune, from Memphis, dated 4th, says that a very severe storm occurred at Fort Pillow and Island No.10 on Tuesday night last.
The steamer Kanawha Valley was capsized and wrecked, and the men on board floated down towards New Madrid, but were saved by the steamers De Seto and Grampus.
Many were without clothes.
They arrived on the Scotland.
The shelling of Island No.10 continues without effect.
One of the enemy's gunboats and one transport have been badly injured.
No further movements above.
The enemy have abandoned Union City.