In a separate medium sized bowl, whisk together the flour, cinnamon, nutmeg, baking soda and salt. Add the flour mixture to the butter, mixing on low with the electric mixer until combined. Turn of the mixer and scrape down the sides of the bowl with a large rubber spatula or wooden spoon, then add in the oats and mix on low speed until incorporated. Gently stir in the raisins with your wooden spoon or rubber spatula. If the batter seems extremely sticky, stir in 1 to 2 more tablespoons flour.