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2/1-2/18 Wave


MJO812

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The Cobb Method is all Rain, with temps. 37 on the GFS, and all Rain and 35 on the NAM.   In fact, the GFS output, which covers the next three possible events { 2/2  2/5  2/7 }is All Rain throughout.   Even the SREF has a higher Rain probability over Snow probability for most of the event.

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Mt. Holly:

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SHORT TERM /6 PM THIS EVENING THROUGH 6 AM FRIDAY/...
Tonight, focus is on the cold front as it moves into our area.
Models are in fairly good agreement of the timing of depicting the
cold front moving through the region between 00 and 06Z (7PM and 1
AM EST). A secondary trough or cold front is also depicted moving
through during the later half of the night (this feature is nearly
coincident with the main cold front in the mid levels, 700 to 600
mb). Where the models disagree is when we are going to have the
strongest cold and dry air advection, mesoscale lift (due to
frontogenesis), and consequently, when we have the highest chance
for precip.

The majority of guidance depicts a solution where the main cold and
dry air advection is with the initial cold front. Consequently, the
window of opportunity for precipitation would end earlier and would
favor less snow or sleet. The NAM on the other hand depicts limited
cold and dry air advection before 09Z, and strong frontogenesis at
700 mb around the same time. This would favor a longer period of
rain at the start, but precip would last longer through the night.

For now, have gone closer to the first solution, but will be
watching the high resolution models and upstream obs closely through
the day. There would be a small chance for mesoscale banding with
the NAM solution, but in general expect amounts to be less than an
inch. Though this technically won`t reach winter weather advisory
criteria anywhere, there is the potential for an impact on travel
early Friday morning as any standing water could refreeze as
temperatures drop.

 

 

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This is an 18 day wave as the Topic Header states ? 2/1 -2/18 Wave ? It should snow and accumulate  at some point during those 18 days along the coast but we might have to wait till closer to day 18 - inland north of 1-80 will have a better chance earlier during  the :bike:   :facepalm:18 day Wave

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1 hour ago, NEG NAO said:

This is an 18 day wave as the Topic Header states ? 2/1 -2/18 Wave ? It should snow and accumulate  at some point during those 18 days along the coast but we might have to wait till closer to day 18 - inland north of 1-80 will have a better chance earlier in the :bike:   :facepalm:18 day Wave

:lmao:

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1 minute ago, UlsterCountySnowZ said:

Nam with a bit more precip, especially ENY

53C4D100-B1D6-49D5-8AD6-09DC54EA0E79.png

notice the Pine Barrons in South Jersey and Long Island have the higher totals - also the hills of Northwest Jersey and of course Northeast NJ gets the usual coating......

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i have a hard time believing anyone in the city sees an inch with this. pavement should struggle to accumulate given a wet/mild start and marginal temps as its snowing. the 700mb frontogenesis is impressive but it's flying thru such that any 1 location would not see more than 1-2 hours of decent precip rates. 

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