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re: No severe weather thread today?
Posted on 6/14/23 at 3:44 pm to deltaland
Posted on 6/14/23 at 3:44 pm to deltaland
quote:
I feel like they’re way looser these days on the parameters for a PDS than they used to be
Well, given the storm environment and structure already seen today I would say the PDS wording is spot on...
Current MLCAPE
EHI
The Energy Helicity Index (EHI) is a number which represents the combination of instability and storm relative helicity. Our calculation uses mixed layer CAPE (surface to 3000ft average parcel) and 0-3 km storm relative helicity. Values greater than 2 or 3 have been correlated to cyclonic supercells with increased tornadic potential. Negative values are indicative of an environment favorable for anti-cyclonic (left moving) supercells, but tornadoes associated with anti-cyclonic supercells are extremely rare.
1
Posted on 6/14/23 at 3:46 pm to Zapps4Life
quote:
Current MLCAPE
Modeled soundings verified on CAPE this time. If anything, they undershot it a bit.
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