Like Coho we watch our Fish Hawk for temp changes. Surface temp is good most of the time in the Spring. We also have found the wind pushing warm waters, bait, and fish shallow. But the Fish Hawk helps when the opposite occurs also (even more so). That is a cold wind can chill the surface temps but there is a band of warm water between the top and the colder bottom.

Like has been said many times, trust your electronics, this includes temp gauges. It is amazing what the newer stuff does. I sometimes feel like I am on a floating computer. It takes study and experience but the new electronics really work. They can't catch fish but they can give you an edge!

BTW if you follow the warmer water shallow, don't be surprised if you pick up some Brown Leapers. Some still consider them trash, but times sure have changed in that regard. We look at them as bonuses. We always catch several Fish Ohio smallies every March when we chase the warm water and Walleye shallow.