Warmest Winter in History: More than 20 Cities Break or Tie All-Time Records. The winter of 2014-15 has been so exceptionally and persistently warm across the western third of the United States that more than 20 cities have tied or broken all-time records for the warmest meteorological winter (Dec. 1 through Feb. 28/29) on record.
The Louisiana Purchase occurred during the term of the third President of the United States, Thomas Jefferson, (1757-1826). Before the purchase was finalized, the decision faced Federalist Party opposition; they argued that it was unconstitutional to acquire any territory.
Who was chosen to explore the Louisiana Territory? Meriwether Lewis and William Clark. They also took with them Clark's slave York and the Indian lady Sacajawea