5 June 2007 Severe Weather

 

On 5 June 2007, severe weather affected much of eastern NY and southern VT. Below is an analysis of some of the initial severe thunderstorms that affected eastern NY, including a mini-supercell that had a well pronounced hook echo in the reflectivity pattern (Fig. 1), and rotation in the Storm Relative Velocity (Fig. 2). While the storm did exhibit mid level rotation consistent with a supercell structure, low level rotation was lacking, so it did not produce a tornado. However, an off-duty NWS employee witnessed a rotating wall cloud over his house in Clifton Park. The storm tracked near Clifton Park and then into Washington County, while new convection back-built to around Cohoes to areas north and east of Troy producing severe hail. Reflectivity vertical displays (Fig. 3) and Reflectivity Cross Sections (Fig. 4) for the leading rotating storm are also displayed. All the radar images are from GR2analyst. The list of severe weather can be found in figure 5.

 

 

Figure 1. Base Reflectivity from KENX at the 0.5 elevation angle, as displayed in GR2analyst at 1618 UTC 5 June. Click on the left figure for a loop showing the evolution of the Base Reflectivity from 1618 UTC through 1635 UTC 5 June. Click on right image for a recentered loop from 1639 UTC to 1743 UTC 5 June.

 

 

Figure 1. Storm Relative Velocity from KENX at the 0.5 elevation angle, as displayed in GR2analyst at 1618 UTC 5 June. Click on the figure for a movie showing the evolution of the Storm Relative Velocity from 1618 UTC through 1639 UTC 5 June.

 

 

 

Figure 3. Vertical 50 dBZ Base Reflectivity from KENX as depicted by GR2analyst. Click on the figure for a movie showing the evolution of the 50 dBZ Base Reflectivity from 1622 UTC through 1639 UTC 5 June.

 

 

Figure 4. . Base Reflectivity Cross Section from KENX as depicted by GR2analyst. Click on the figure for a movie showing the evolution of the Reflectivity Cross Section from 1626 UTC through 1639 UTC 5 June.

 

Map of 070605_rpts's severe weather reports

 

 

Figure 5. Severe weather reports for 5 June 2007.