From mmo-champion.com the new Thunderstorm talent reads as...

You call down a bolt of lightning, energizing you and damaging nearby enemies within 10 yards. Restores 5% mana to you and deals 595 to 679 Nature damage to all nearby enemies, knocking them back 5 yards.
Instant, 45 sec cooldown

Please read thread carefully, a Blue poster has already confirmed that this was not the intended nerf. - Fur