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Weekly Meeting 09Jun2017

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Weekly Meeting 09Jun2017

 PDF of daily mean CAPE, BWD, and SRH over the U.S. from the CFSR data for understanding the PDF of SCP

o CAPE: convective available potential energy o BWD: bulk wind difference

o SRH: storm-relative helicity

o SCP: supercell composite parameter

SCP = (CAPE/1000 J kg1) × (SRH/50 m2 s2) × (BWD/20 m s1)

 Correlation between GEFS forecasted 7-day mean SCP and CFSR SCP, 1996–2012, lead time: day 1 – day 8

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PercentagePercentage PercentagePercentage Non-Gaussian

distribution

2

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4

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Day 1 – day 7 average

Day 2 – day 8 average

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6 Day 8 – day 14

average (Week 2)

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from the CFSR

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