Severe Weather
May 16, 2012

The synoptic set up was conducive for severe weather in the Northeast, with a strong mid/upper level disturbance moving eastward across the eastern Great Lakes during the day/evening. A strong mid level wind max, with the core positioned just to the northwest of our area, was associated with this upper level disturbance and was mainly responsible for the large magnitude of deep layer vertical wind shear of 40-50 knots.

At the surface, as is typical for this area, there were at least two distinct boundaries present. One was a pre-frontal trough that progressed eastward from central NY during the morning/early afternoon. Dewpoints dropped in the upper 40s to lower 50s to the west of this boundary, which to the east in our area dewpoints were in the upper 50s to lower 60s. Convection was initiated along this boundary, over the western Adirondacks and Mohawk Valley early to mid afternoon and progressed eastward. The second boundary was a cold front over western NY.

Local Storm Reports

12Z Sounding
Upper Air Sounding at 8 AM
18Z Sounding
Upper Air Sounding at 2 PM
Link to all 12Z Wed May 16, 2012 Upper Air Maps (courtesy SPC) Link to all 00Z Thu May 17, 2012 Upper Air Maps (courtesy SPC)

Radar with Polygons

Animated Radar Imagery