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March 3-5 Event


windvane

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Looked to me like the 850's ticked colder this run.  Also of note is that its faster...  for most the storm is done by 18Z Monday on this run.  QPF still pretty good, widespread ~1".

 

Well, then. If the faster scenarios verify with the still rather high qpf, it looks like some fols are going to see some pretty heavy snow at times.

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06 gfs shifted north about 60 miles. Quite a bit of sleet and freezing rain south of the turnpike.

 

 

with all the snowcover, frozen great lakes, and models typically under-doing the level of cold a day or 2 before the event...my money's still on a colder trending event. 

 

The worry might eventually be too cold, and a storm out to sea.  But since it's an early march storm, the odds go slightly against that. 

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NAM is still actin funny though. 

 

not liking how it brings everything in, in 2 broken pieces. 

 

Euro seems like a blend between GFS and NAM...so it's got some weight.

 

WNEP must be going with the NAM then. Noreen was on this morning and mentioned up to 5 inches for the northern tier from wave one, and 10 inches farther south for wave two.

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with all the snowcover, frozen great lakes, and models typically under-doing the level of cold a day or 2 before the event...my money's still on a colder trending event. 

 

The worry might eventually be too cold, and a storm out to sea.  But since it's an early march storm, the odds go slightly against that. 

 

Model tendency is generally to be not aggressive enough with low level cold air or mid-level warm air. 

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Model tendency is generally to be not aggressive enough

 

 

I haven't seen the models being aggressive enough with the deepening of the Lows yet either...which seems to happen a day or 2 before as well.  

 

Still many unknowns.   Everything needs to be perfect for an all-snow event. 

 

Best case : Colder and deeper. 

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still looking good at 48.

 

High off the shore position further north, similar to GFS.   (it's trending..)

Trended farther Nortth this run. Still has the warmth on Sunday then we finally get the push of the PV which is also positioned farther North this run. We'll see what happens after 72 hours which is critical. 

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Trended farther Nortth this run. Still has the warmth on Sunday then we finally get the push of the PV which is also positioned farther North this run. We'll see what happens after 72 hours which is critical. 

Its extremely warm, +4 at 800 mb all the way to TTN 12Z Monday.  Not that we should trust the NAM this far out.  Especially given it just went from way south to way north.

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I would think that the hi-res models tend to over phase especially when taken verbatim outside of its useful range.  I believe they are probably displaying a little too much interaction with the s/w and the PV therefore portraying a much different solution than the GFS and EURO.  I am not sure what their track records are with over running setups outside of 48 hrs but I would think especially in this type of setup they shouldn't be considered until the tomorrow night.  Just my two cents.

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NAM more beefed up on QPF, and more wintry with 2nd wave.   That is a good sign.  

 

Little evidence of sleet.   Should be mostly snow. 

 

Correct me if i'm wrong, but March storms also seem to have higher chances of Rain or Snow.  (compared to sleet and frz rain)  Due to typically / historically colder higher up. 

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NAM more beefed up on QPF, and more wintry with 2nd wave.   That is a good sign.  

 

Little evidence of sleet.   Should be mostly snow. 

Are you referencing PHL proper or is this an IMBY post? If you are talking about PHL I respectfully disagree based on this run and thermal profiles just glancing at thicknesses and 2m temps. Havent seen soundings yet though. 

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