Upper Atmosphere Turmoil Record Blocking Developing Across North Atlantic

February 23, 2018

This has been quite a week with temperatures reaching the mid and upper 70s and even the lower 80s. Many cities in the Northeast & Northern Middle Atlantic States set either record highs or all time record highs. The high pressure cell in the upper atmosphere that brought up the warm air was the strongest ever observed for this time of year. Now we have the rubber band snapping back next week to a North Atlantic blocking pattern. Blocking patterns shift the jet stream well to the south of normal. Under certain conditions some of the biggest snow storms we have ever seen here in South Central Pennsylvania and North Central Maryland have come under blocking patterns. It is not a guarantee you will get one but we are coming to the end of February and into the beginning of March. This is one of the most volatile times of the year where big temperature swings from day to day become common place. Look at what just happened with temperatures near 80 2 days ago and now we are back in the 30s and 40s.

 

 We will explain more on this in a moment. This weekend will be rather gloomy at times and we will see some rain here though it doesn't rain straight through Sunday. There will be some dry periods in between waves of showers. Rainfall amounts forecast should be on the order of an inch to an inch and a quarter in most places.Precautionary flood watches are posted for the next 2 days for South Central Pennsylvania.

 

 Once we get through this weekend weather conditions improve early next week. This is where the atmospheric turmoil begins. You can read more about this on METEOROLOGISTJOECIOFFI.COM

 

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