Hi! Is Forecast technically an ability word or a keyword ability? MTGSalvation lists it as a keyword ability, but it doesn't seem to fit the normal pattern.
Forecast is a keyword ability.
Forecast looks an awful lot like an ability word, but it has a bit of rules baggage to facilitate being able to activate it from your hand and to make sure it’s only activated once each turn.
702.56. Forecast
702.56a. A forecast ability is a special kind of activated ability that can be activated only from a player’s hand. It’s written “Forecast — [Activated ability].”
702.56b. A forecast ability may be activated only during the upkeep step of the card’s owner and only once each turn. The controller of the forecast ability reveals the card with that ability from his or her hand as the ability is activated. That player plays with that card revealed in his or her hand until it leaves the player’s hand or until a step or phase that isn’t an upkeep step begins, whichever comes first.