Severe Weather
May 9, 2009

A strong low pressure system approached the area from Great Lakes region Saturday, May 9th. The system's cold front moved across the local area during the late afternoon and evening hours. There were strong upper level dynamics associated with the system: 500 mb winds of 60 to 80 knots and 300 mb winds of 120 to 130 knots. The limiting factor for the day was atmospheric instability: extensive cloud cover early in the day limited sunshine and there was somewhat limited low level moisture. The main threat of the day was damaging winds, however there was directional wind shear and wind speed shear in lowest levels of the atmosphere so there was an additional concern for rotating thunderstorms and isolated tornadoes.

SPC Severe Thunderstorm Event Page: May 9, 2009
Storm Reports Jul 27, 2008

Local Storm Reports: Albany NY --- Burlington VT --- Taunton MA

Public Information Statements about Tornadoes: Burlington VT & Taunton MA

Tree Damage: Stephentown, NY - Rensselaer County & Cheshire, MA - Berkshire County
Photos Courtesy of WTEN

12Z (8 am) ALB Upper Air Sounding May 9, 2009
ALB Upper Air Sounding 8 am EDT May 9, 2009
18Z (2 pm) ALB Upper Air Sounding May 9, 2009
ALB Upper Air Sounding 2 pm EDT May 9, 2009

Surface Map May 9, 2009
Surface Map 8 am EDT May 9, 2009
500 mb Map May 9, 2009
500 mb Map 8 am EDT May 9, 2009