Friday Update


There is a great degree of uncertainty, again, about the weather this weekend. Latest weather models suggest an increased expectation of snow. I think we could easily see anywhere from 2-6″ of accumulated snow and sleet by tomorrow night with additional snow on Sunday through Monday bringing totals to 4-8″.

There is still a significant risk of ice in the form of sleet and freezing rain, but latest models suggest a clean change-over from rain to snow. Throughout this morning, we will see very little precipitation as we are in  a dry slot of the overall system. Precipitation should resume this afternoon making the evening rush hour a challenge.

 

Very Ugly Weather Friday


Friday will bring us pretty much every type of precipitation we see here in Western PA – in one day. We will wake to rain on Friday morning before it turns to freezing rain and sleet around mid-day. I am very concerned about a flash freeze on Friday as cold temperatures invade the area and the changeover to snow occurs. After the change-over, we will see only snow, which will continue throughout the day on Saturday. Depending on when the change over occurs, we could see variable snow totals, even within areas just a few miles apart. In general, I expect about 1-3″ of snow, but 2-4″ is quite possible.

Sunday we continue to see some mixed precipitation but not a significant amount.

Monday is a warmer day, with temperatures moderating. I am expecting mostly rain on Monday before turning to snow. Snow amounts are still in question, but could total several inches. Wednesday and Thursday will be very cold, with temperatures likely to dip to the lower teens and possibly the single digits.

Snow and Cold on the Way


It looks like we should expect some ice before turning to snow on Friday. Accumulations will mostly be in the 2-4″ range. The snow will have some melt off before the cold returns early in the week when we are looking at a much larger threat of snow, when several inches are possible. The larger issue, however, will be the cold. Temperatures will feel more like mid-January than mid-December as we head into mid-month. It is entirely possible that we will see temperatures near zero during this next cold outbreak later next week.

Weekend Snow


As temperatures climb this week it may be difficult picture snow this weekend, but it appears as though that is where we are headed. A preliminary look show 2-5″ on Friday into Saturday morning with a little melt-off before another 2-4″ on Monday.

This will usher in some very cold weather. This is starting to remind me a lot of the winter of 2009-2010.

A Mild Week, Then More Cold


November turned out to give us a fast start to winter with temperatures a significant -3.5 degrees Fahrenheit below normal and with 6.3″ of snow above normal. This was our snowiest November since 1995 and our 8th snowiest November, ever!

Starting Monday, temperatures will begin to moderate, before reaching all-out winter, balmy weather late this week, but Cold will begin to return over the weekend as cold entrenched in the Great Plains will edge eastward, and bring temperatures that sink well below normal. I am watching for the possibility of a small snow event next weekend, followed by a larger event early the following week. Temperatures should moderate again near mid-month, before the cold digs in, again, hopefully in time to bring snow and cold for the holidays.

Game On!


I am now on the 6″+ bandwagon. Last night the strongest model for this storm increased our snow totals by just a minor shift to the east. Additionally, the storm has more moisture than was originally modeled before the storm was underway. I don’t think it is unreasonable to say we could see 9″ (or more.)

Last Forecast Update


A lot of forecasts, including the Pittsburgh NWS seem to think we get 6″+ of snow. I would love to see that much snow, but I have serious doubts it will happen. I think 3-6″ is probably a more likely forecast for most of Allegheny County. The good news is that if we get 6″+, that means we saw less ice and rain, and will likely spare motorists from countless accidents.

 
Please be safe as you drive and shovel, as the snow should be the sloppier, heavy snow.