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March 7th 2018 Coastal Storm thread (not obs)


Rjay

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2 hours ago, Blizzard-on-GFS said:

Huge shifts east. This storm will be a HECS for philly kn northeastward.

Don't trust last minute shifts when the storm is right upon us. It either shows the models can't get it right till it's right on top of us or plain wrong.

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11 minutes ago, Stormlover74 said:

Which models are those?

for Manhattan, snow depth sits at 2-4" until about 12hrs from now before it jumps up to 8-12"+ around 6pm onward.  looking at 6z rgem, 6z gfs, hrrr, etc.  

gfs_asnow_neus_fh12-18.thumb.gif.76ddae75d3102d468e2cb8dd3d8bfadc.gifrgem_asnow_neus_fh10-19.thumb.gif.8b558506e667467274b59aced0ff32c8.gif

nam3km_asnow_neus_fh12-21.gif

 

my point being, that people asking why schools aren't cancelled yet is because the heavy stuff doesnt get here (or at least doesn't appear so on the models) till after people are home at 5-6pm today.  

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Upton:

Noting showalters over roughly the southern half of the CWA
progged down to 2 to 4 this afternoon/early evening and elevated
CAPE (700 hPa based) over this same area up to a few hundred
J/kg - have added a slight chance of thunder to this area as
well. Note areas that do experience thunder, will likely see any
precipitation change to either all snow or a snow/graupel mix
if not already all snow. These areas could receive a rather
significant accumulation of snow, very quickly. Outside of any
convective enhancement and banding, expect maximum snowfall
rates of 1-2" per hour, but could see 2-4"/hr rates with any
convective enhancement and banding. Latest high-resolution
models suggest that banding should set up from NE NJ/Orange
County into interior SW CT. The most likely time for the banding
to occur is this afternoon - could see 6-10" of snow fall from
around noon-sunset across the NW 2/5th of the CWA.
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5 minutes ago, hooralph said:

I am personally delighted that NYC did not cancel school today. Seems even with the higher totals, the delay in the onset of the heavy stuff argues for staying open. That said, the afternoon/evening commute could be historically bad.

There are going to be major issues and it will be regretted. THe banding then is insane.

looking so much better low for western LI! 

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1 hour ago, Snow88 said:

SPC has a thunderstorm outlook for later on for NYC and NJ.

It will be cool see the snowfall rates associated with this convective blob/CCB moving in later. I can't remember the HRRR showing such a big 50 dbz+ core outside thunderstorm season.

rad11.thumb.gif.82bff8796fe285931617b1860cfd1864.gif

 

 

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31 minutes ago, LongBeachSurfFreak said:

There are going to be major issues and it will be regretted. THe banding then is insane.

looking so much better low for western LI! 

I agree. I am being entirely selfish. I may have to leave work early and go for a JebWalk home (MSG to !01 st ;)  

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To give an idea of the source airmass for our CCB, the CAMs are insistent that big, long lived supercells are going to pop this evening at the triple point over the edge of the Gulf Stream, about 150mi east of Ocean City.  This has been observed with other shoulder-season noreasters (more fall than spring) but it’s not common when it’s cold enough to snow in the CCB.

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38 minutes ago, bluewave said:

It will be cool see the snowfall rates associated with this convective blob/CCB moving in later. I can't remember the HRRR showing a big 50 dbz+ core outside thunderstorm season.

rad11.thumb.gif.82bff8796fe285931617b1860cfd1864.gif

 

 

If that verified I would have to imagine rates would be 5/6” hour. They would be more but you may actually end up with some grapul 

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Im watching all these TV mets,,,,,let me ask you guys something,,,,MOST of the recent model runs trended colder and more EAST yet these clowns, some of them anyways are saying it will rain or mix in the City and Staten Island , boroughs ----Im a weenie and I want it to snow but using your head and not your heart---some of these guys are out of their minds. in keeping with thread, radar still looking good to the South

 

 

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1 minute ago, Brasiluvsnow said:

Im watching all these TV mets,,,,,let me ask you guys something,,,,MOST of the recent model runs trended colder and more EAST yet these clowns, some of them anyways are saying it will rain or mix in the City and Staten Island , boroughs ----Im a weenie and I want it to snow but using your head and not your heart---some of these guys are out of their minds. in keeping with thread, radar still looking good to the South

 

 

I've always noticed that they run approximately 6-12 hours behind the models. With that said, I try not to have the TV news on too much with kids in the house. Everyday is something else insane, especially incorrect forecasts.

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