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PD Holiday Weekend Mess DISCO


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4 minutes ago, UnitedWx said:

Out this way I don't think so. A couple hours in the 40s (maybe) with clouds, and two layers of sleet and freezing rain in the current pack. It's got some staying power, super dense stuff

Yeah will be fine there 

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25 minutes ago, wdrag said:

Not sure what you're reading but that's a 60%. chance for 1" NYC CP... even icing near NYC.  Probably a pretty decent from end snow, the temps unlikely to get out of the upper 30s-lower 40s NYC on Sunday and potentially serious ice storm I84 hilly terrain with some damage.  My concern is the gusty winds for the I84 corridor behind the storm Sunday night-Monday morning taking down ice laden limbs (snow laden well north of I84). 

OBS thread for Saturday event will probably post at 7AM Saturday.   I may run it as an OBS thread for the front end wintry and then tack on wind damage for Sun night-Monday, and whatever Feb melted water equivalent totals you have for Feb at that time (through the 16th) in that thread. 

From NYC forum 

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4 minutes ago, Kitz Craver said:

Hopefully not too much. Wall to wall coverage currently about 5.5” high water content stuff

What will save some pack in parts of this area today will be keeping the clouds. Looks like it should stay cloudy much of the day. Plus ground temp quite cold, big plus. Last night had the driveway covered within 15 minutes of when the snow started falling.

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Just now, UnitedWx said:

What will save some pack in parts of this area today will be keeping the clouds. Looks like it should stay cloudy much of the day. Plus ground temp quite cold, big plus. Last night had the driveway covered within 15 minutes of when the snow started falling.

Yup keep that sun away and we won’t see grass

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You need a lot of time above 36-37F or so to start denting the pack when you’re socked in clouds and precip like today. Otherwise it will mostly just absorb the extra water when it’s mid-30s and not melt off much. Far southern and southeastern areas that spend a chunk of the afternoon above 40F will lose some (prob not enough to wipe it out) but it will probably be fairly minimal elsewhere.

 

Anyways, this weekends storm can still turn to mostly shit…if we reverse the overnight trend then it’s back to where we were yesterday at 12z. 

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Heights over western N/A are the challenge.  This situation leading and during the 20th needs that component to improve, otherwise this will be another enhanced modeling challenge over the week with both spatial-temporal aspect, and just spacial synoptic interference issues. 

It's a bit frustrating because from what I am seeing, the basal hemisphere is a little less compressed ( less is definitely better! ).  You can see in the 00z 500 mb height cinema of all three, Euro/CMC/GFS, how the SPV fragment really tries to tuck into the S/stream, but because the flow geometry lacks that meridian restoring ( better ridge west --> constructive depth feedback in the east), the situation ends up stretched looking with the triggered cyclone escaping ENE in the CMC/GFS.  The only real difference between the Euro and these misses is the Euro actually gets the thread through the needle's eye on 00z stab.  

But again ... the flow overall is -d(gradient), and so if a ridge were to materialize over the west, that whole downstream situation would be slower/more proficiency compared to these bottle rocket smear troughs of the last month

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6 minutes ago, Typhoon Tip said:

Heights over western N/A are the challenge.  This situation leading and during the 20th needs that component to improve, otherwise this will be another enhanced modeling challenge over the week with both spatial-temporal aspect, and just spacial synoptic interference issues. 

It's a bit frustrating because from what I am seeing, the basal hemisphere is a little less compressed ( less is definitely better! ).  You can see in the 00z 500 mb height cinema of all three, Euro/CMC/GFS, how the SPV fragment really tries to tuck into the S/stream, but because the flow geometry lacks that meridian restoring ( better ridge west --> constructive depth feedback in the east), the situation ends up stretched looking with the triggered cyclone escaping ENE in the CMC/GFS.  The only real difference between the Euro and these misses is the Euro actually gets the thread through the needle's eye on 00z stab.  

But again ... the flow overall is -d(gradient), and so if a ridge were to materialize over the west, that whole downstream situation would be slower/more proficiency compared to these bottle rocket smear troughs of the last month

wrong thread

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