Thursday, December 8, 2016

Name Change and More Updates

After long months of not posting anything on this blog, I've decided to return to blogging on a more regular basis. While I can't guarantee post frequency, I can say that I will attempt to write as many as one or two posts a week. Most of my updates will be made on the Facebook page from now on.

I have also decided that I was going to go through a name change. While I originally chose the name Northwest Ohio Storm Prediction Center more than five years ago, I have decided to change the name for several reasons.

1. The name is too close to the name "Storm Prediction Center" which is actually an official source for severe weather forecasting. I do not want to confuse people through social media thinking that my publishing is from an official source when it isn't.

2. The name is too complicated and I thought that Lower Great Lakes Weather And Climate would be a more suitable name. Since I do not intend on doing any national forecasting any time soon, keeping it more regionally based sounded best for the time being.

Now, in terms of the actual ongoing forecast, we have an interesting situation developing.

First, it is clear by now that this winter season will be vastly different from last winter. Last December featured the warmest December on record, shattering previous records. Fort Wayne's average temperature was above normal by nearly 15 degrees Fahrenheit, which is incredibly significant. Many other areas across the lower Great Lakes saw record warm Decembers as well.

Interestingly enough, November 2016 was an incredibly warm month for many areas, but it appears that this December will feature vastly different conditions, with very cold Arctic air likely dominating at times.

It is uncertain what the rest of the season will look like, but it appears that temperatures in January and February will moderate. However, it does appear that the entire season will feature wetter and potentially snowier than normal conditions for most of the area.

Secondly, in terms of the medium and long-range forecast, we have the potential for another two major Arctic waves to impact the area by the week of the 18th. The first wave next week will be preceded by a winter storm that will impact many areas from Chicago to Detroit, Fort Wayne, Cleveland, Columbus, Indianapolis and many other areas. While there is still significant uncertainty in terms of who will see the biggest impacts and the most snow, it appears that a broad swath of five or more inches of snow could fall from northern Illinois into northern Indiana, northern Ohio and southern Michigan. Areas farther south could be dealing with lesser amounts due to the probability of rain and ice mixing with the snow.

The timing for this event is likely to be from Saturday night into Monday morning. Saturday night, a week clipper-like system will impact the area with widespread light to moderate snow. A couple inches of snow could fall in this first event. Then, a more significant round of precipitation is likely to begin by Sunday afternoon and evening, with heavier snowfall for many areas. However, due to the strength of the system, it is likely that many areas, especially central Ohio and south, will see a rain/snow mix due to warm air aloft. Again, this is not set in stone because there is still a lot of uncertainty in the model solutions but we do have a general idea of what will happen.

I will keep you updated on the main Facebook page.

Saturday, January 2, 2016

Long-term Outlook


With the past few days of computer model runs, forecasts are coming into agreement that colder, and potentially snowier weather is on the way. While colder temperatures and snow showers are likely this weekend and early in the week, this will only be brief, as temperatures will moderate once again above normal by the mid to late portion of next week. However, this appears to be only transient.

Models are now beginning to show much colder weather infiltrating into the United States beginning in the 8 to 10 day period. [January 10th through the 12th]. Interaction with a disturbance in the southern stream will likely result in some sort of storm system moving from the Deep South off the coast and developing as a potential coastal low. After this disturbance, the northern stream [polar jet] will begin to dominate again as blocking begins to develop across high latitudes. A lot remains to be seen with this storm system [the Deep South/potential coastal storm], as it is only one possible solution, but even if this storm system does not develop, a fresh wave of Arctic air should move southward out of Canada and engulf the area soon after. And given past scenarios where this has occurred, there's at least a decent chance some areas will get accumulating snow out of this, whether it is from the southern low or from the weak clipper system that brings the cold air out of Canada.

At the same time, however, it is uncertain as to how long this wave of Arctic air will last. Given the depiction of the event on ensembles and operational model runs, it looks as if it as the potential to last for at least a several day period if not longer. Even when the coldest of the air leaves the region, it is still very likely that temperatures remain near or below normal for the remainder of January, with only a few days of above normal temperatures to end the month [it is possible that we see another transient warm up ahead of another Arctic wave as we head towards the end of the month].

Hopefully I'll be able to post a more detailed discussion of the situation later tonight or tomorrow. Until then, I'll just end the post with the 06z GFS solution for ten days from now [shown above]. This image is depicting a massive Arctic high pressure system sliding southward out of Canada, bringing a round of snow to the Central Plains with the associated clipper [which very well may give a good portion of the Ohio Valley a snow event].