Complicated storm

We have one more pleasant day today, even if it did start off rather cold.  We will see abundant sunshine through at least the first half of the day before some clouds develop.  Temperatures should make it to 40 degrees in Southern New England and 30s for Central and Northern NE.  The clouds that will start to move in will be in response to the approaching storm system set to arrive on Friday morning.

After reviewing some computer guidance this morning, the system appears to be moving a bit slower than previously forecast.  Instead of the precipitation getting started around 3 AM, it will probably start around sunrise now, closer to 7 AM.  Precipitation type is proving difficult to forecast, as surface temperatures in many locations will get close to or below freezing for a time on Friday morning.  I will provide 2 maps today, one indicating precipitation type and the other indicating snow totals, much easier to show you rather than describe it.

Green is all rain, the pinkish color is where there will be a period of a mix and then the light blue is all snow.  Below is snow total map.

As you can see VT and most of NH are going do well in terms of snow with this storm.  I left the accumulation range pretty wide as there is going to be banding in spots which will give some areas high amounts.  It would be far too difficult to pin those locations down.  The purple area will see a few hours of sleet and freezing rain before changing over to mainly rain.  Fortunately this won't produce much accumulation, but will make the road messy.  The green area should be mostly rain, with some northern areas in this zone seeing some mixing, but hardly any accumulation.

There is going to be quite a bit of liquid associated with this storm and there is going to be flooding problems.  The flooding problems will obviously be in the locations that have mostly rain.  Eastern MA and RI may have to deal with the worst of any flooding that occurs.  This will be caused by ice daming of small tributaries and street drains that are still clogged with ice.  Just be mindful of this tomorrow and avoid driving across water covered roadways.

Beyond Friday, we'll see another light snow on Sunday morning, followed by a gradual warm up leading to what looks like storm on Tuesday that provides mainly rain.  More to come on this, but I think you have plenty to chew on for now.  :-)

Thanks for reading and post any questions in the comments area below!

-Jon K.