Complex sentence: The odds of a notable tornado outbreak forming on Palm Sunday for a third time in nearly 40 years would be relatively low; however, tornadoes usually are more intense and at their deadliest during late March and early April, anyway.
Split into simpler sentences: The odds of a notable tornado outbreak forming on Palm Sunday for a third time in nearly 40 years would be relatively low. However, tornadoes usually are more intense and at their deadliest during late March and early April, anyway.