URP in both the SUDDS view and the SERF view are great tools for monitoring the available Radar Data. However there are instances when the algorithms fail to identify certain features that may or may not be apparent to the meteorologist’s eye. In this example Two thunderstorm cells seem to be rather innocuous however this turned out not to be the case with at least one of these thunderstorms producing a significant amount of tree damage from both straight line winds and a possible tornado.
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| SUDDS View at 2120Z with one of the cells hightlighted. |
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| The doppler GlogZ data from XAM radara at 2120 Z |
The GlogZ data is capable of giving a higher resolution image and in the image above you can see the classic supercell shape in two of the southern storms on the radar.
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| Zoom of the ClogZ 1.5 at 2120Z |
In this image the supercells seem to be more appearent however it is important to consider that atenuation do to the heavy rain closer to the radar may have also affected the appearent intensity of these storms.
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| VR 1.5 at 2120Z |
At the VR 1.5 degree we can see two possible areas of rotation however there are componets of convergence and rotation in both of these storms. Interegation of these cells indicated peak tangential velocity is 25 to 30 m/s which is significant.
In this example knowing the limitations of the tools and using an appropriate diagnosis will help identify supercells on challenging severe weather days.
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| Example of tree blowdown near BlackBrook |
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| Another Blowdown area near Black Brook |
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