26 July severe weather outbreak

 

A cold front tracked across the region causing severe thunderstorms. There was considerable instability, and some indication of an elevated mixed layer.

 

 

Above: Soundings from 12Z 26 July from Albany, NY (ALB), Buffalo, NY (BUF) and Wanamaki, Ontario Canada (WMW). Note the considerable instability and the steeper lapse rates at BUF and WMW upstream of ALB suggesting the steeper lapse rates would advect into the Albany, NY area later in the day.

 

 

Above: Upper plots of 250 hPa, 500 hPa and 850 hPa from 12Z 26 July. There was a strong upper impulse tracking toward the northeastern U.S. and upper jet segment.

 

 

Above: Surface map from 18Z 26 July showing the cold front tracking into the northeastern U.S.

 

 

Above: Storm Prediction Center severe weather outlooks and probabilities for hail and damaging winds.

 

 

Above: Low level lapse rates showing the region of greatest low level instability over southern NY and western New England and greatest midlevel instability in northern NY and northern New England.

 

 

Above: Deep layer shear over the northeastern U.S. Usually values above 50 support severe weather potential.

 

 

Above: Mesoscale discussion issued at 1005 AM describing severe weather potential for NY and New England.

 

 

Above: Water vapor satellite loop (left) and visible satellite loop (right).

 

 

Above: Radar reflectivity loops and warning polygons through the severe weather event.

 

 

Above: Severe weather reports.