Possible enhanced precipitation due to the release CSI for 12/7 -12/8 2007

As you know, the release of CSI can cause enhanced precipitation bands. It looks like tonight Denver and the surrounding area are sitting under a region favorable for CSI to occur. Looking at the LL wind veering and the pseudo-adiabatic characteristic of the sounding from this morning, it all points to "Conditional Symmetric Instability!" In addition, we are sitting underneath the anticyclonic side of a jet as well. Although condition is favorable it does not mean we will get enhanced snowfall. These CSI-induced bands are very small scale with respect to size and time. They are rarely larger than 50 km in width and never last longer than 3-4 hours. My thinking for this weekend is that the snowfall tonight should not be too bad with the exception of few isolated areas which could see up to 6" or more snowfall, while most areas will see 1-3". Saturday night with the better upslope setup, we should see more snowfall across the Front Range area overall.

12z DNR Sounding for 07 December 2007

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12z 300mb UA analysis for 07 December 2007

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21z 300mb RUC initialization for 07 December 2007

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