Winter Weather

It is becoming apparent as we look over the latest radar trends and guidance, that more areas are likely to changeover to snow and sleet than our final call is forecasting. Many areas over the Central PA mountains will begin to changeover to sleet and snow over the next few hours. This was expected. However, we are now forecasting a wraparound band of snow and sleet as the storm pushes away. This wraparound band of snow and sleet will likely develop late Tonight into early Tuesday Morning. The potential does exist for this band to produce some surprises so we…MORE...
We are now within 12-24 hours before the region feels the impacts from Tomorrow’s Nor’easter. Winter Storm Watches have been issued for Northcentral and Northeastern PA with Wind Advisories in Southeast PA. Guidance has trended colder since our first call last night. This puts many more locations under the gun for a changeover to sleet and/or wet snow later in the day Monday as the Nor’easter begins to really crank off the coast. To all those weather enthusiasts out there, sit back and enjoy this storm. The radar will be lit up Tomorrow Afternoon and Evening with just about every…MORE...
While guidance trended less aggressive in terms of the snow side with this powerful nor’easter, there will still be a nice swath of accumulating snowfall from Central PA through Northern PA. We will all begin as rain late Sunday Night/Early Monday Morning, Central PA and Northern PA will begin to change from rain to a mix of sleet/rain to eventually wet snowfall that has the potential to lay down several inches, especially in the highest of elevations. For the rest of us in South-central PA/Southeast PA/East-Central PA, we will be in for a cold soaking and heavy rainfall. Western PA…MORE...
After a stretch of mild weather, we are tracking a potent coastal storm that will be impacting our weather in a big way come Sunday Night and into Monday Night. Over the last several days, Josh and I have been tracking this system and even though model guidance continued to show an all rainstorm, we discussed between ourselves the potential for this to turn on somewhat snowy. And sure enough, here we are a couple days later and model guidance has finally caught onto our ideas of a rain and snowstorm. The current path this system is projected to take…MORE...
To begin with, this article will be more technical than normal. This winter started off with temperatures near average in December. Though, you were probably wondering why it never snowed when it was cold and why it always rained when it was warm. We often turn to the NAO and AO when we think of winter. However, neither of those factors really played a big role in December. The teleconnection that dominated the pattern was the PNA. If you don’t know what the PNA is, it’s no big deal. All you need to know is when the PNA is negative,…MORE...
Today, a 127 year old record was broken across parts of the state. In addition, flash flood and severe thunderstorm warnings shaded the map in Western Pennsylvania north of Pittsburgh as a strong line of storms rolled through. This is what mid-January has come to here in PA. Will it last? Of course not! Just 36 hours from now snow will be falling in some of the same regions that reached the mid 60s today. The same system that will be giving us snow and ice Saturday will be crippling some areas of the Central Plains with up to an…MORE...
Before we go into the discussion about Saturday’s light snowfall, we are also tracking very mild air that will overspread the state Tomorrow. There is the potential for some areas to reach and/or surpass all-time high temperatures for January 12th. Many locations will reach the middle 50s, with some areas even reaching the lower 60s! Impressive for the middle of January to say the least. GFS model projected high temperatures for Tomorrow: A cold front will then quickly push through the state from the Northwest to the Southeast overnight Thursday and into early Friday Morning. This will lead to more…MORE...
Only slight changes have been made to Tomorrow’s forecast, but overall the general theme remains the same. This will not be a big event. The precipitation that falls Tomorrow will be on the light side and any accumulations of snow and/or ice will be light as well. Timing: Precipitation will begin in Western PA in the mid-morning hours Tomorrow and then around lunchtime for Central and Eastern PA. The precipitation may start off as a brief period of snow, especially farther north in pa, before changing to sleet and freezing rain later in the afternoon. We expect everyone to change…MORE...
We are tracking a system that will produce a light wintry mix for our state on Tuesday. Precipitation will likely start off as snow for the northern two-thirds of the state Tuesday morning, before transitioning to a period of sleet and freezing rain by the afternoon hours. All areas will end in the form of rain by Wednesday morning. Below is the GFS valid Tuesday 7 PM: You can see areas in Western PA have already changed to rain, while Central and Eastern areas are dealing with Snow (blue), Sleet (orange), and Freezing rain (Pink). It is important to know…MORE...
What looked to be a near miss for Southeast PA a couple days ago, now looks like a moderate snowfall event, with significant to even major totals along the coast. Over the last 36-48 hours, there has been a consistent Northwest trend with how far the snow bands extend Northwest into PA. With that said, we have upgraded and pushed our zones farther Northwest into PA from our previous call last night. Below is the latest RGEM valid 1 PM Tomorrow Afternoon, representing the shift Northwest well: FINAL CALL SNOW TOTALS Timing: The snow will begin between 5 am and…MORE...
Light snow has officially begun in parts of Western PA this afternoon, and will continue to overspread the state as we progress into the evening hours. Although the snow amounts anticipated will be on the rather light side, timing will be critical. Because it is very cold, the snow that does fall will stick to all surfaces and will quickly add up. Our biggest concern right now is for Southeastern PA where it looks like the snow may linger into the morning rush hour Friday Morning. FINAL CALL FORECAST TONIGHT INTO TOMORROW MORNING Our only big change from our first…MORE...
An area of low pressure tracking just to our south will try to strengthen as it heads off the coast Thursday Night. This puts the entire state on the cold side of the storm, leading to our first true all-snow event, especially for Southern PA. Although the snow amounts anticipated will be on the rather light side, timing will be critical. We are expecting the snow to begin in the mid-afternoon hours¬†out West and by the evening hours in Eastern PA. Because it will be very cold, the snow that does fall will stick to all surfaces and will quickly…MORE...
Since we have released our first call yesterday evening, guidance has suggested upper air temperatures to be a tad bit warmer than previously expected. What this means is, for areas in Southern PA, a mix with rain showers will more of a common theme than we originally thought. However, our first call for this area was only for a coating to an inch, so regardless, not much was to be expected. Timing has been pushed up a bit: Precipitation will overspread Western PA between 2 and 4 AM, Central PA between 4 and 6 AM, and Eastern PA after 6…MORE...
Lake effect snow is likely Friday across Western PA. Area A – Snow accumulation of 8-12″+. Area B – Snow accumulation of 4-8″. Area C – Snow accumulation of 2-4″. Area D – Snow accumulation of 1-2″. Area E – Snow accumulation of less than 1″. Like us on facebook at Pennsylvania Weather Action and remember to share the forecast with your family and friends below!
After a rather warm day across PA Today, it is almost hard to believe in a couple days we will be dealing with a Winter Storm impacting us on Thursday. As we mentioned yesterday, we are watching two areas of low pressure systems this week that will lead to our Winter Storm on Thursday. One will be dropping out of Canada in the form of a weak clipper system, while another area of low pressure develops in the south and eventually heads northeast. Where these two systems merge off the coast on Thursday, will determine how much snow we end…MORE...

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