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February 12th-14 Redeveloper Nowcast/Obs


Baroclinic Zone

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18 minutes ago, wxeyeNH said:

Sleet mixing in here.  50/50 sleet snow  14.6  Only 3" ish has accumulated

I apologize for my 3" ish post.  I have some other stuff to deal with tonight so eyeballed railings.  Snow has been so fine the railings are not good representation.  Went out and did a few measurements on flat open surfaces.  its almost 5.5" 

Back to sleet 

ddd.jpg

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1 minute ago, wxeyeNH said:

I apologize for my 3" ish post.  I have some other stuff to deal with tonight so eyeballed railings.  Snow has been so fine the railings are not good representation.  Went out and did a few measurements on flat open surfaces.  its almost 5.5" 

Back to sleet 

ddd.jpg

Nice. Give me my golden bust award back.

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Any ideas on why the ptype was zr with this DTW sounding? Peak warm nose of 1.2C with 30mb of depth and a cold boundary layer underneath. DTW reported 0.41" of ice accretion via ASOS. Toronto and Hamilton also had a lot of freezing rain today even when the soundings look predominantly suggestive of IP with a relatively high (750-800mb) warm nose with lots of cold air underneath. 

 

 

2019021212.72632.skewt.parc.gif

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3 minutes ago, CoastalWx said:

Was the peak warm nose warmer and thicker than that 00z sounding? Was the most maximized near the warm tongue? Those are two questions I would ask.

That was 12z, I'm not sure about stuff before and after for DTW. The model soundings for YYZ  from 12z for 18-21z this afternoon/evening generally had fairly small and high warm nose near 1 C, but they ended up with 4 hours of zr. Is there some sort of cloud microphysics/lift arguments for zr with less pronounced warm noses? idk. 

rdps_2019021206_015_43.65--79.38.png

nam_2019021206_015_43.65--79.32.png

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24 minutes ago, HoarfrostHubb said:

Heard that things are a mess in Franklin County...

At least all 4 of our  school districts have delayed openings

Roads, by all accounts were a disaster since 3pn.   My neighbors just drove back from the airport in Hartford, they said I 91 was still completely snow-covered and they finally got off in Easthampton and took Route 5/10 back to Greenfield.

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28 minutes ago, wxeyeNH said:

I apologize for my 3" ish post.  I have some other stuff to deal with tonight so eyeballed railings.  Snow has been so fine the railings are not good representation.  Went out and did a few measurements on flat open surfaces.  its almost 5.5" 

Back to sleet 

ddd.jpg

Ha, big difference there, almost double what you estimated. 

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9 minutes ago, OSUmetstud said:

Yeah, that makes some sense. I was thinking something similar. Thanks. 

I'd agree with that...DGZ looks not totally saturated....if it was, then it would totally be a sleet sounding, but all the precip generation looks like it may have been below that level.

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