February Will Be Chilly; But Will Snow Finally Show Up?

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,…

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Second Call Forecast For Saturday’s Snow & Ice

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…

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First Call Forecast for Saturday’s Light Snowfall

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…

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Final Call on Tomorrow’s Wintry Mix

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…

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First Call For Tuesday’s Wintry Mix

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…

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Significant Coastal Snowstorm for Saturday, Snow Totals Upgraded

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…

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FINAL CALL Snowfall Forecast For Snow Tonight, FIRST CALL Snowfall Forecast for Saturday Snow

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…

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FIRST CALL Snowfall Forecast For Thursday Evening into Friday Morning

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…

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Final Call Forecast For Thursday’s Snowfall

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…

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First Call Forecast For Friday’s Lake Effect Snow

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!

First Call Snow Totals for Thursday’s Winter Storm

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…

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Light Snow Event Thursday For PA, Nor’Easter for New England

We are watching two areas of low pressure systems this week that will lead to our potential snow event 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, is what makes the major differences between model guidance and also our snowfall amounts. The quicker and further south these two systems merge, the more likely it is our state gets into a more note-worthy snowfall, especially Northeastern PA. The…

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Christmas Weekend Forecast

We have good news and bad news. The bad news is those who are rooting for a white Christmas this year, will have to wait another year. The good news is, there is no major weather maker in the forecast for the holiday weekend. However, there is a relatively weak system that will impact the state late Friday Night into Saturday Morning. With temperatures marginally cold enough to support snow, we expect there to be rain and snow showers throughout the state during the first half of your Saturday. Areas North of I-80 have the best chance at receiving some…

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FINAL CALL For Significant Snow & Ice Storm Tonight into Saturday

There is now the threat of a widespread ice storm in Central and Western Pennsylvania. While upper levels warm Saturday Morning, moderate precipitation will continue in many areas with surface temperatures well below freezing. Deep valleys will hang on to cold air the longest Saturday, with some areas not reaching the freezing mark until mid-afternoon. Below is the RGEM for 4 AM Saturday Morning. As you can see, while the overwhelming majority of the state is experiencing snow at this point, freezing rain is beginning over Southwestern PA. Here is the same model for 7 AM Saturday. By 7 AM,…

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Second Call Forecast For Friday Night into Saturday’s Significant Winter Storm

We have good news and we have bad news. The good news is, guidance has dropped snow totals somewhat for nearly the entire state. The bad news is, it now looks like there will be more ice involved especially for Central PA. Timing: Snow will overspread the state after 8 PM Friday Evening for Western areas, and then after 11 PM for Central and Eastern areas. As we head into the overnight hours early Saturday Morning, likely after 4 AM for Southwest PA and after 8 AM for areas further to the North and East, a changeover to sleet and…

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