WESTCHESTER Westchester single family contract activity was higher than prior year levels as severe winter weather conditions pushed first quarter pending sales into the second quarter. Despite the 16.7% decline in closed home sales, total contracts expanded 3.9% from the prior year quarter and jumped 51.9% from the prior quarter. The rise in contracts from first to second quarter was higher than the 35.5% average increase of the prior 2 years. Listing inventory expanded 7.9% to 3,905 rising from the low water mark set in 2013…