Thursday, June 22, 2017

Huge difference in modified NUCAPS (Experimental) from unmodified

We were working the Jackson, MS CWA east of Trop. Depression Cindy.  Our strongest storms were near the Mississippi River.  We checked out soundings there.  Here's one of the unmodified NUCAPS soundings.
It does not look unstable and has a sfc temp of 74F and DP of 63F.  All CAPE values zero.

However the Experimental modified sounding looked like what we expect to see after using a sfc temp of 85F, DP 74F.
Now much more unstable, and SB CAPE 2625, MUCAPE 2630.

The modification is essential.

Davis Nolan
WKRN Meteorologist


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