Andover, MA- WSI (Weather Services International) expects the WSI US Outlook March-May 2011 upcoming period (March-May) to average colder than normal across the northern and western with above-normal temperatures expected to be confined to parts of the south-central and southeastern states. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
"As a very cold winter comes to a close, La Nina is clearly in complete control of the pattern as we head into spring. The tremendous North Atlantic blocking episode during the first half of winter has subsided allowing for a more textbook La Nina pattern to develop, specifically cold weather across much of the northern and western US and occasional glimpses of warmer temperatures across parts of the southern and eastern US" said WSI Chief Meteorologist Dr. Todd Crawford.