ChescoWx

A significant winter storm begins toward midnight on Saturday night. Today should be our last relatively mild day for the rest of the month of January and into the start of February. Tomorrow we return to near normal temperatures with highs in the middle 30’s. An arctic cold front will cross the area later tomorrow afternoon temperatures will fall quickly to single digits above zero by midnight. Saturday will be very cold and breezy with highs only in the mid-teens. The snow arrives overnight and continues through at least 1pm on Sunday. By that point, most areas of Chester County could see between 6” to 8” of snow. At some point after that we should begin to see the snow mix with and change to sleet and freezing rain from SE to NW across the area This will cut into any additional potential snow accumulations. The final snow/sleet accumulation totals will depend on how fast this changeover occurs. Either way there will be plenty of snow and sleet accumulation. Unseasonably cold weather follows the storm with temperatures likely not rising above freezing for possibly at least the next 10 days.

A significant winter storm begins toward midnight on Saturday night. Today should be our last relatively mild day for the rest of the month of January and into the start of February. Tomorrow we return to near normal temperatures with highs in the middle 30’s. An arctic cold front will cross the area later tomorrow afternoon temperatures will fall quickly to single digits above zero by midnight. Saturday will be very cold and breezy with highs only in the mid-teens. The snow arrives overnight and continues through at least 1pm on Sunday. By that point, most areas of Chester County could see between 6” to 8” of snow. At some point after that we should begin to see the snow mix with and change to sleet and freezing rain from SE to NW across the area This will cut into any additional potential snow accumulations. The final snow/sleet accumulation totals will depend on how fast this changeover occurs. Either way there will be plenty of snow and sleet accumulation. Unseasonably cold weather follows the storm with temperatures likely not rising above freezing for possibly at least the next 10 days.

That is a great stat there!! thanks!!

Our best storms always have some non-snow in the mix.

Thanks Anthony! I did not know that!!

Many of the lower valley locations across the area saw temperatures below zero overnight and this morning. The lowest was the 8.1 below zero at the Warwick DEOS site this is the 2nd coldest reading in station history behind only last January 22nd with a low of 9.1 below zero. The West Chester DEOS recorded it's coldest temperature in station history when the mercury fell to 1.9 degrees below zero this morning. Both stations have records back to 2012. We should see temps get close to freezing this afternoon and even milder tomorrow with highs near 40 degrees to melt some of the snow cover. The milder air is a one-day event as colder air moves back in tomorrow night setting the stage for what could be a major winter storm beginning as early as late Saturday or early Sunday morning. Snow may last into Monday morning before tapering off.

Many of the lower valley locations across the area saw temperatures below zero overnight and this morning. The lowest was the 8.1 below zero at the Warwick DEOS site this is the 2nd coldest reading in station history behind only last January 22nd with a low of 9.1 below zero. The West Chester DEOS recorded it's coldest temperature in station history when the mercury fell to 1.9 degrees below zero this morning. Both stations have records back to 2012. We should see temps get close to freezing this afternoon and even milder tomorrow with highs near 40 degrees to melt some of the snow cover. The milder air is a one-day event as colder air moves back in tomorrow night setting the stage for what could be a major winter storm beginning as early as late Saturday or early Sunday morning. Snow may last into Monday morning before tapering off.

Always appreciate your professional views!! Thanks for your thoughts even though you are no longer in the area!!

NBM with an increase

6z vs 12z below

The latest European AI slipped south cutting snow totals almost in half across PA

My pleasure zen!!

Pretty stark differences between the first two 12z runs today. GFS says not a flake for this area.....ICON - significant snowstorm.

IMHO this is not really a Miller B type set up....more the bowling ball rolling along the baroclinic zone.....

Thanks Kevin!!