Pennsylvania Climate

What is the best interpretation of Pennsylvania climate?

• The Appalachian system lies entirely outside Pennsylvania.
• Physiographic provinces are political districts created by the state legislature.
• Lake Erie has no effect on northwestern Pennsylvania’s weather.
• Lake-effect processes can create localized snowfall totals that differ greatly from statewide averages.

Which description of Pennsylvania climate is correct?

• All Pennsylvania rivers drain through the same watershed.
• Physiographic provinces are political districts created by the state legislature.
• Pennsylvania has uniform physical geography with little regional variation.
• Climate normals and individual weather events should not be treated as equivalent evidence.