A major winter storm with a variety of different precipitation types will move through the area Monday into Tuesday. Although there will be a significant contrast regarding impacts across the state, we believe the entire region will start out with snow Monday Afternoon and Early Evening. Heading into Late Evening Monday and into Tuesday things will get interesting.
Many people are stuck wondering how it can be in the negatives one morning and raining 36 hours later. This is because our high pressure that is responsible for the cold air will be exiting the region, opening the door for warmer air. Furthermore, because the low pressure will track somewhat inland, warm southerly winds to the east of the center will warm up areas such as Philadelphia.
Continuing on, there is still some uncertainty regarding the exact track of this storm, meaning there is still room for changes in the forecast. This forecast will not be an easy one due to a flat out mess, but here is our storm setup map with the key below it.
AREA A – A quick period of snow is possible Monday Afternoon before changing over to all rain, light to no impacts.
AREA B – A period of snow is possible Monday Afternoon/Evening before light freezing rain late evening through about midnight. Light snow accumulations possible along with light freezing rain/ice accretion. By Early Tuesday Morning precipitation type will be primarily plain rain. Light impacts are expected, however Monday Evening could be slick.
AREA C – A several hour long period of snow is likely Monday Afternoon into Evening before changing over to freezing rain Late Monday Night. Freezing rain will last through around dawn before temperatures warm above freezing changing everything over to rain. Moderate snow accumulation is possible along with moderate freezing rain/ice accretion. Moderate impacts are expected Monday Evening through the night into Tuesday Morning. Light impacts will still be felt the entire day Tuesday as scattered power outages will be possible along with slushy roads.
AREA D – A long period of moderate to heavy snow will be likely Late Monday Afternoon, through the evening and into Early Tuesday Morning. A changeover to freezing rain is likely a few hours before dawn, which will last into Mid-Tuesday Morning. Precipitation type could then flip to all rain by noon Tuesday although there is the potential this area does not change to rain. Heavy snow accumulation is possible along with light to moderate freezing rain/ice accretion. Moderate impacts expected Monday Evening before major impacts Monday Night into Tuesday. Snow packed roads will be likely along with scattered power outages.
AREA E – This area has a medium to high probability of staying all snow for the duration of this storm, with some freezing rain possible around noon Tuesday. Moderate impacts likely Monday Evening before major impacts Tuesday Morning lasting through the evening. Even after that many roads will be snow packed and this will be a heavy wet snow. Power outages will be possible.
AREA F – All snow is expected from this storm, likely starting Monday Evening lasting through Tuesday Afternoon. Moderate impacts likely Monday Evening through Tuesday Evening. Moderate snowfall accumulations possible.
Once again, there is still some uncertainty with the exact storm track of this system which will dictate what areas of the region see what impacts. Stay tuned as we will have a better idea of snowfall accumulation and ice accretion with this storm in our first call Saturday Evening.
Be sure to check our Facebook Page for many more updates on this major winter storm >>> Pennsylvania Weather Action Facebook Page! Stay safe!
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