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TS Fay - Drought ending Rains and Severe Convection


weatherwiz
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  On 7/9/2020 at 9:24 PM, wxeyeNH said:

Question about PRE's.   Do they only occur with stronger systems or could a band of convective showers break out earlier than forecasted?

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They just need deep tropical convection to sustain them, so TC strength isn't a necessary factor. 

With this event I would personally like to see a better upper jet to really get that moisture transport going.

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  On 7/9/2020 at 2:42 PM, weatherwiz said:

The higher helicity I think is more of a product of the stronger llvl flow rather than turning of the winds in the lower levels. However, storm moving may be slightly angled compared to the mean flow so that could certainly enhance rotation potential. Regardless, I don't think instability in the lowest lvls is going to be sufficient enough. 

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That's the key, and why I'd watch the coast near NJ if it tucks just inland. Could be enough 0-3 km CAPE to get it done, but timing doesn't look great for New England.

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  On 7/9/2020 at 9:47 PM, OceanStWx said:

That's the key, and why I'd watch the coast near NJ if it tucks just inland. Could be enough 0-3 km CAPE to get it done, but timing doesn't look great for New England.

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Saturday looks looks rather intriguing to me...in fact, there are some signals we could see some serious dewpoint pooling. Could see dews maybe 75-77. 

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