USCAPEWEATHERAF

3.1mb last hour

I got 3.2" as of 414pm this afternoon in Harwich, MA.  Temp has dropped to 31F as NE winds take over and switch to N at times.  Our surface low is below 994mb just southeast of the benchmark.  Pressure falls at the buoy near the benchmark has dropped almost 4mb in the last hour.

Dendrites are amazing, like Lake Effect Snows.

I mean the observations right now, CHH is heavy snow, mist, 32F, vis 0.25 sm, NE winds, and the bands are setting up NE to SW which favors a pivot location over the Cape.  It is incredible snowfall right now over my area.  Radar looks fascinating.  The band over the Cape is being fed by a southerly feed or southeasterly feed, just watch the radar in close over the CAPE, incredible dynamics right now.  Would not be surprised to see temps continue to drop below 30F as the heaviest snow band sets up.  Also 12"+ is certainly plausible.  WOW!

VIS is dropping quickly from the Vineyard to Falmouth, to Hyannis and inching into Dennis and Harwich next half hour.  Chatham and Provincetown only obs sites over the Cape and Islands reporting rain.

Hey Will, try COD weather or Wunderground for the updated radar imagery.

12:05 pm is when we started to get wet snow flakes mixing in with the rain, temp has cooled six degrees in the last two hours or so, temperature is 35F.

Radar image

I was really giddy reading the MESO discussion from the SPC.  I have not had one of those in my area in the last three plus seasons.

2 minutes ago, HalloweenGale said:

Just noticed. A few puffs of wind shaking the spruces by the road. Other than those puffs, there's little to no wind.

Another Cape Cod poster said it is turning to snow in Barnstable, Falmouth, the OBS site at Otis is reporting light snow with a vis of 1.75 sm.

Returns over and south of MVY are quickly becoming intense, 35 DBZ right now.  That will likely turn into a super band and drag the cold air to the surface over the Cape, and the Vineyard, the exception might be ACK.

Bands south of the Islands have been moving NE all morning, and are now moving Northward.  Especially the heavier returns.

3 minutes ago, HalloweenGale said:

Steel gray skies. You can feel something is coming.

It is coming, just need to show patience

1 minute ago, SnowEMass said:

Beautiful snow hole right over me.  Let’s see how long that goes on.  

Not long by the trends on radar

Been pretty warm since the sun rose, we were down near 28F before 6am and then it warmed quickly to a high of 41F and now we are down to 38F

3 minutes ago, CT Valley Snowman said:

Virga here

WE are close to snowing right now.  It is snowing at every tilt but the lowest.

Is it snowing at Wiz's place?  Snowing in western CT?

Snow Sky, clear definition of snow falling from the sky, but with low level dry air present it is presenting a snow sky.

We dipped into the 27-28F range this early morning, now the temp is at 32F, so it warmed some recently.  dew point of 28F.  Radar shows the first bands appearing south of the Vineyard (KMVY), Block Island (KBID) and Nantucket (KACK)

Just now, weathafella said:

No possibility.   In fact temperatures are going to burn some good qpf unfortunately 

The model showed that verbatim

Just now, powderfreak said:

Only 24 hours out for the most part.

 

15-16" in my hood

Just now, TauntonBlizzard2013 said:

Hopefully it doesn’t turn into a repeat of the last system... watching white rain.

You should be good for 6-12".

00z NAM is a hair slower with the amplifying southern shortwave trough.  Oh and the 21z SREFs have joined the consensus a South Coast and South Shore jackpot zone with 8-12"

Just now, Baroclinic Zone said:

Nice curl to the s/w at 18hr.  Should bump banding north

Bob, that is what I meant by phase, since I saw the H5 heights fall with the shortwave I thought there had to be a phase, but the shortwave was amplifying itself due to the negative tilt.  That happened sooner.

1 minute ago, CoastalWx said:

You may start as a mix, but should go over to snow fairly quickly. It’s cold aloft. 

RAP and HRRR are trending towards a faster amplification of the southern stream disturbance as it reaches ACK's latitude.

Just now, CoastalWx said:

You may start as a mix, but should go over to snow fairly quickly. It’s cold aloft. 

Yeah and the storm is very dynamic and is going through its best intensification phase at the same time its passing to our southeast and east.  I was told, that in order to get the best bands to develop, you want to be on the northwest side of the surface low and H7 low tracks as the surface low is intensifying, preferably bombing out!