Perhaps you are already aware of this early spring carp behavior pattern, but if not, I'll explain. My office is on a shallow cove off of the main lake at Nockamixon. Likewise, I fish a shallow cove off of the main lake at Blue Marsh in the last half of March and the first week of April. In one case winds blow into the cove and on bright days, push a little warm surface water into the cove. In both cases, when the air temp is not particularly warm, the coves warm up in 2-3 ft of water a little more rapidly than the rest of the lake due to the clear water, mud bottom, and solar heating. Carp, as well as baitfish and the occasional striper hybrid, are attracted to these conditions, which don't last very long. As soon as the rest of the two lakes begin to warm or as soon as we have an exceptionally cold night, the fish are gone. The carp may return, however, once the coves warm again, which might be late the very same day. The carp are quite vulnerable to the fly angler at that time and there are schools of carp rather than an occasional fish to which you will be able to cast. You might want to check for this carp behavior pattern at your local lake. You can find the proper coves by checking for the shallow coves into which the winds blow when blowing from the north, northwest, or west. Likewise, you may also want to identify coves with extensive shallows toward the back ends of those coves. That's where you will find the fish.