Quite an impressive storm. One thing that I was impressed by was the lower-level moisture. In Taree and Port Macquarie, the pre-storm obs were 23/22 and 24/22, respectively. That results in some seriously low LCL's. The Williamtown sounding shows that the lowest 200 mbar was almost totally saturated. This rich low-level moisture resulted in quite an unstable environment despite the low surface temps. Couple that with 30-40 knot WSW winds at 500 mbar and ~10 knot E/ENE winds in the lowest 100 mbar and you have quite a decent storm setup.
Supercell
Supercell
Re: Eastern NSW Severe storms / supercells 16-17 March 2011
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Also on 17 March
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17 Mar 2015 · Cooktown, QLD
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