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Thumper the Dumper obs/pics 12/16 to 12/18/16


Ginx snewx

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13 minutes ago, Typhoon Tip said:

 

you might actually flip back and forth a couple times before finally committing ...

if the p-type algorithms are any guide (and they are usually good to within 80 to 90% of truth) that transition zone is presently slammed up against the shore and is wavering.  Also, there is clear indication for an interval of pretty heavy fall rates about to sweep through...  Granted this is a waa snow in a purer form so in theory the growth region should be collapsing in time, but there could still be some big humdinger golf ball aggregates near the true transition as that heavier stuff comes through. 

These things can be hinky like this... you could go squarely to freezing rain... then, at like 34 when that's ended, a brief period of pingers kicks in then it rains... Ur like, what -

28 degrees with a light N wind and light to moderate freezing rain.  

It's been about 1/2 hour now - and there hasn't been a ping or snowflake since so I'm assuming there won't be much flipping or flopping from here on out.  

This transition was committed!  

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1 minute ago, dendrite said:

Seems like decent snow growth here, but I'll take a core at 10am.

We have a monster isothermal layer around -11C to -12C from the sfc up to 600mb. That's not exactly primed in the max zone around -15C (+/- 3C), but it's not crappy either.

isothermalsfch6.gif

 

We've got massive fluffy dendrites up here but it might also be this 30-35dbz band...flakes were smaller in the lighter stuff.

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