Sunday, April 10, 2011

Severe weather threat diminishes for April 10 Severe Weather Event: Part 3

For the previous post, Part 2, click here.

This final post will address the model views of this supposed squall line.
We will use the Significant Tornado Parameter images, because the tornado threat is the risk that diminished.
First, let us see the short range model RUC.
The RUC is very aggressive with this parameter, indicating a potential outbreak may occur in those areas. This wanes away from the SPC's outlooks.
I am not surprised, seeing as how the potential for a significant tornado outbreak collapsed in less than 12 hours.
Next up will be the NAM.
The NAM is much less intense with the risk, but still poses a threat over the Western Great Lakes. That said, it can be predicted a separate outbreak should occur up north.
Finally, we will see the old GFS run.
The GFS actually cuts out the outbreak up north and brings it down to the Lower Great Lakes region. It predicts no outbreak in Wisconsin. However, it does predict this image above.

After reviewing these images, there is still more to say.
-The NAM model is slower than the HPC agency.
-The GFS model is slower than the NAM model.

There are still differences to be worked out, and things will change. We will keep you updated as the day wears on.

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