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Potential extensive winter event, I-95 west and with again a chance for NYC first inch(es) of snow Mon or more likely Tue Jan 16, 2024 (serves as OBS thread as well)


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8 minutes ago, LibertyBell said:

I know Chris said with time we are getting used to the above normal temps, but one thing that should also be added is that with time we are also getting less used to snow.  I envision in a few decades we WILL be like Atlanta when it comes to snow and 1-3 inches of snow will cause school closures and major traffic situations.

I guess I never understood why people think 2 should be easier to drive in than 4 or 6. A slick road is a slick road and it only takes a glaze of freezing drizzle to make roads and sidewalks treacherous

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1 hour ago, RU848789 said:

Of course that band is sleet, damn - best looking band of the storm lost to sleet. The dual pol looked like it and verified. Final (I think) snow measurement as of 8:30 am was 2.3" and I cleared the board to measure the sleet (which does get added to the snow, although sleet is much more dense than snow - typically 1" of liquid translates to 3" of sleet and 10" of snow). Hopefully the freezing rain holds off for awhile, although the temp has jumped up to 28F...

Well, we flipped to freezing rain a little while ago, but it did sleet pretty decently for 30-45 minutes, which put down 0.1" of sleet before the ZR, so our final total for the storm is 2.4", which is a bit of a bust vs. the NWS advisory for 3-5" and my prediction of 3.2", but still a nice storm if you like snow and it'll be around to enjoy for at least a week and might even be topped off on Friday.  I recall being excited, but a bit skeptical when the NWS bumped up their forecast yesterday afternoon; in hindsight their 2-4" forecast for 95 and most of CNJ/NNJ would've been better.  

I cleared a small paved area when it changed to sleet and yes, it's now covered with the 0.1" of sleet and a glaze of ice on top, which will likely get worse for untreated paved surfaces, as temps are still only 29F and freezing rain continues to fall until early afternoon here with temps only forecast to reach 32F.  Time for some sleep, then some shoveling...

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Big time cooling in the satellite imagery CP as a short wave approaches from the southwest. Snow and intensities of mixd precipitation I95 should intensify and expand west the next 4 hours (19z).  So far lots of fine flake dense packed snow here in Wantage with 2" but should get a decent dump 11A-2P here in SC.  21F.

see tropical tidbits satellite imagery or the various WFO pages. 

 

Fine flake snow in progress despite few radar returns. 

 

 

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16 minutes ago, jm1220 said:

If we keep NE wind we won’t rise much if at all. Seems to be a coastal front near the twin forks where temps are in the upper 30s, let’s see if that can make headway west.

Upton extended the WWA until 7 for Nw and SW Suffolk, was set to expire at 10 am. Smart move. Side streets are a mess 

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19 minutes ago, psv88 said:

Upton extended the WWA until 7 for Nw and SW Suffolk, was set to expire at 10 am. Smart move. Side streets are a mess 

Latest HRRR doesn’t really get NW Suffolk, N Nassau into the city above freezing. May touch 33 very briefly. By 3-4pm temps start crashing behind the front and maybe a brief flip back to snow. 

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1 minute ago, jm1220 said:

Latest HRRR doesn’t really get NW Suffolk, N Nassau into the city above freezing. May touch 33 very briefly. By 3-4pm temps start crashing behind the front and maybe a brief flip back to snow. 

Yea temps have flatined around 31 LIE north. Even the north fork is below freezing still. At work in Melville and there is ice accretion in the trees now

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3 minutes ago, psv88 said:

Yea temps have flatined around 31 LIE north. Even the north fork is below freezing still. At work in Melville and there is ice accretion in the trees now

Usually the story with models-underestimate mid level warmth and overestimate surface warmth. On a NE wind we won’t budge. The freezing rain releases some warmth into the air through the droplets freezing but without WAA at the surface we’d just get up to 33. Roads later will be awful. 

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17 hours ago, RU848789 said:

NAM and RGEM have consistently shown that freezing rain risk after about 9 am or so, but the globals either have all snow for 95 or a later changover to sleet or freezing rain. Freezing rain sucks, as it's dangerous and aesthetically unpleasing. Saving grace could be that it'll mostly be falling on top of snow, forming a crust and not falling on bare ground forming ice rinks.  It also could rob many of us along 95 and even a bit NW/SE of 95 of 0.1-0.2" QPF (or 1-2" of snow), which would also suck.  Hopefully the Euro is right on this.  Thoughts on how this might play out?  

zr_acc-imp.us_ma.png

 

zr_acc-imp.us_ma.png

Score a huge win for the NAM and the RGEM the two major mesoscale/regional models, as both models have been calling for significant freezing rain (ZR) since Sunday morning and generally weren't joined by the global models in predicting appreciable ZR until Monday morning or afternoon.  

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