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Jan 20-24 storm window opens (Jan 22 potential)


Typhoon Tip

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The moist southeasterly flow at the surface ahead of the main low pressure center will allow for light snow to break out by Monday afternoon.  Latest guidance suggests a good 4-8" of snow will impact the region by Monday night into Tuesday morning.  Tuesday afternoon the OES will kick in with strong banding signal just offshore of Truro, MA.  THe surface winds are expected to stay out of the Northwest throughout Tueday and Wednesday and then Thursday before another snowstorm impacts the region on Friday and Saturday.

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the 0z BTV WRF really hammers portsmouth nh to york/wells maine.  big pocket of 1-1.60 qpf in that area. also pocket of 1-1.25 qpf from haverhill area N to interior SE nh...exeter, etc.   that model is good and is starting to hone in i'm afraid, i hope it shifts south a bit but norlun climo may argue against that. 

 

is this a "pure" norlun , is there even such a thing lol.

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The btv looks right. It also is pretty nice down to Quincy including Boston indicative of more 2-5 considering high ratios vs 1-3. Lynn northeast is nice and parts of see coast Maine get smoked.

Euro is definitely more but still pretty meh. Hwever, the distribution of max more or less agrees with btv.

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The btv looks right. It also is pretty ice down to Quincy including Boston indicative of more 2-5 considering high ratios vs 1-3. Lynn northeast is nice and parts of see coast Maine get smoked.

Euro is definitely more but still pretty meh. Hwever, the distribution of max more or less agrees with btv.

considering the 0z 4km hrrr-arm comes in almost mirroring the BTV WRF 0z high apf areas, it seems we have increasing confidence SW maine is in the bulls eye WRT to this event. YORK maine over to wells SW to portsmouth area is modeled to have .75+ with bullseye near 1.50 right on coast around wells,maine. sharp cut off to the NE toward portland on both meso models.  

 

also to note 0z HRRR-arw has outer cape in a higher qpf like btv-wrf did basically .5+ qpf area on outer 1/2 of cape.

 

HRRR has same area from haverhill over to exeter getting a bit more than the rest of NE mass as did btv wrf . basically north central mass over to NE mass has .25-.50 on hrrr. DITTO for RI and SE mass over to W cape. with a bit less sandwiched between the two .25-.50 areas.

 

i would consider winter storm warnings for portsmouth over to well maine by tomm am if meso continue to highlight this area. 6am to 1pm is when that area really gets absolutely blitzed on meso models. i would think currently NE mass and coastal maine further NE should monitor trends on meso especially as small shifts would seriously effect these areas.

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I actually anticipated that the models come back to their amped up solutions, more so because of the Gulf Stream and that intensity of the baroclinic zone which will feed into the norlun trough.  NAM is much better in its handling of energy at H5, actually intensifies the H5 vort max as it crosses the region.  Surface low develops closer to the coast and then rapidly strengthens.  The GFS has begun to catch onto this happening as of the 00z run, its 6z run will be fascinating to watch.

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I actually anticipated that the models come back to their amped up solutions, more so because of the Gulf Stream and that intensity of the baroclinic zone which will feed into the norlun trough. NAM is much better in its handling of energy at H5, actually intensifies the H5 vort max as it crosses the region. Surface low develops closer to the coast and then rapidly strengthens. The GFS has begun to catch onto this happening as of the 00z run, its 6z run will be fascinating to watch.

It has nothing to do with the gulf stream.

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I'm gonna trim back the 3-6 East of river to 2-4 with 1-3 west of river... 3-6 for Eastern Mass ,..Congrats on your winter storm warning later on

 

I guess Middlesex County and Rhode Island count as "east of the river".   :)

 

Seriously though-while there may be reports higher, I think the 1-3" from all of CT/ and in Mass from ORH-west looks good.  Higher end east and trail downward from there.  Will likely have a little blowing of it tomorrow as well--particularly in the areas that get several inches.

 

Congrats Dave on making it into the weenie-stripe on the BOX map.

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