A warm front try to move through the region on Monday and
this frontal boundary will cause a round of precipitation to develop and move
through our region late Sunday Night and especially early on Monday Morning.
Freezing rain or rain is possible, but it likely will be on the light side. The
higher chances for freezing rain will be where there remains decent snow cover
by Sunday Night or in the higher terrain. Right now this looks to be north and
northeast of Philadelphia. Even a trace of ice can cause hazardous driving
conditions, so we will have to monitor the precipitation as it may impact the
Monday Morning commute.
How fast do temperatures respond in the wake of the warm
front and does the warm front struggle to move through the area as it
encounters the snow-pack The MOS Guidance suggests 50 to 55 degrees for Monday
at Philadelphia International Airport. The airport only 1.4" of snow. So this is possible here. But just north and northeast of here is
where there is some uncertainty. Areas of fog also may be an issue on Monday.
So right now, forecasting 50 degrees is reasonable for the airport. But this
can easily be a bust and locations north or northeast of here may not make it
out of the forties. A cold front comes through Monday Evening with additional
showers.
We might be impacted by a storm system on Wednesday. There
is very low confidence regarding the eventual storm track of a potential area
of low pressure and this leads to very low confidence on the type and intensity
of any possible precipitation. Without getting fancy, I indicated a mixture of
rain, sleet, and wet snow is possible. If the system is stronger and can pull
in some cold air, a snowier system cannot be ruled out.
