Using Gene Kritsky’s formula, and the Weather Underground, I’ve pulled together some sample emergence predictions. Chances are I missed your town, but you can use the formula and gab your own prediction.
Louisville Kentucky – May 11th
Lexington Kentucky – May 15th
Cincinnati & Batavia Ohio – May 15th*
Charleston West Virginia – May 11th
Bendersville, PA – May 15th
Islip & Stony Brook, LI — May 16th
Plymouth, MA – May 22
Falmouth, MA – May 24
Looks like the cicadas will start appearing a couple at a time next week, and then starting the following week the full-blow emergences will begin in the southern most states.
* Note: Gene Kritsky wrote to say that he has predicted May 13th for Cincinnati using his formula. The reason the numbers differ is Gene has more precise temperature information.