Between personal observation and hearing stuff on local radio:

In Northern Ohio, there will be no blooms/fruits this year from:

Flowering Pear ("Bradford" or "Callery" pear as some call them)

Flowering Crabapple

Flowering Cherry

Redbud

Forsythia (they were already blooming, now limp)

Lilacs

Hydrangea

Apricots

In most (95%) cases the plants will survive, but only get new leaves and not flowers.

Marginal (some may bloom/fruit, some not):

Fruiting Peaches

Fruiting Cherries

Dogwood

Probably OK:

Tulips

Late-blooming Daffodils

Most late bulb flowers

Anything that blooms after June 1 (roses, Butterfly Bush, etc)

Apples

Pears (fruiting pears)

Plums

Strawberries

Raspberries

Blackberries