Sunday, September 7, 2025

09/07/2025

 Quit post on a week ahead and a bit on the current drought conditions and long range.



Surface chart and radar snow the cold front off the coast pushing east Rain showers and some thunderstorms over eastern New England extending down into the Northern Middle Atlantic. As the front slowly pushes east The rain over eastern New  England down through the I-95 corridor will gradually clear west to east.

Surface chart also shows Canadian high pressure to the north and west that will be building in. Today into tomorrow is going to feature slightly below average temperatures. With the cooler air streaming in over the Great Lakes there could be some lake effect rain showers downwind of Lake Ontario and Lake Erie.  The lake effect will continue into Monday morning, as the below average temperatures continue. 

The high pressure is going to be in control for most of this upcoming week keeping us dry, with temperatures becoming seasonal starting Tuesday. Wednesday will be a rinse and repeat. Then on Thursday we will see a cold front approaching. Ahead of the front a southern flow will bring in warmer temperatures with humidity staying fairly in check.  The front will be moisture starved, so outside of a few isolated showers, it shouldn't have much impact on the region. But, the front will have a reinforcing shot of colder air with it for Friday into the weekend. Then for Sunday Low pressure will be approaching bringing a chance for more in the way of widespread rain and some thunderstorms.


Drought



The lack of rainfall across the region has led to the expansion of drought conditions, reduced stream flow and the lowering of groundwater levels. Looking at the  Drought Monitor image we can see that severe drought has greatly expanded across parts of northern New England. Right now, 13% of the northeast is experiencing severe drought,  17% is seeing moderate drought, 41% of the region is seeing abnormally dry conditions. The rainfall pattern Moving forward over the next few weeks Supports the idea Of drought conditions expanding further.


The longer range

We still have a lot of troughing here in the Great Lakes and Northeast. As I said in the latest post on the upcoming winter This general troughing is going to stick around our region For the next couple of weeks. This is supported by the Climate Protection Centers Temperature outlooks.


Image credit tropical tidbits



Image credit CPC/NOAA

The days are getting shorter and the atmosphere is quickly adjusting to a winter time pattern.

As we move through September We are going to see strong ridging develop over The central CONUS, the west coast looks to see troughing develop which will help them cool off from all the heat they've been experiencing. As we get closer to the end of September all that ridging and heat building into the Central US is going to start drifting towards the Eastern US, allowing seasonal to slightly above average temperatures  to setup for the end of September.

The North slope of Alaska and the Northwest Territories are going to continue to cool off. This will allow the snow pack over northern Alaska and Siberia to build, Allowing the seasonal sea ice melt to reverse and start to build again. The snow pack that will be building in Siberia will be important for the upcoming winter outlook. 

Current sea ice extant is more expansive than it was last year. With the melting quickly slowing down we will soon see the reversal and ice will build back across the Bering Sea and Bering strait.  The colder air will have a much better chance to flow across the Pole into North America.




3 comments:

  1. The Siberian snow pack,is that important too us because it helps with the cold up by the pole.
    We were hammered yesterday,I saw something that I have seen very few times. Tordano Warning for Adams.I've seen Tornado Watch for Adams but Warning,not so much.I opened up the NOAA Weather App.and looked at the radar,we were in solid red but to our South coming from Eastern N.Y.was a line Severe Weather,but it was moving East,then another part of the storm was moving up into the strong storm to the North but moving NNE and looked as if the two mixed it could cause some spin.I figured that was the area that Tornado's come into Mass from Eastern N.Y. so I went back to football.I didn’t hear of any Tornadoes on the ground but didn’t read that much about the storm damage.Did you hear of one touching the ground.

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    1. The greater the snow extent Over Siberia In October the greater the chance for strong high pressure developing over Eurasia. This in turn helps lead to a weaker polar vortex And increasing the likelihood Of cold air incursions into the United States. There was a tornado that touched down in Holden Massachusetts.

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  2. You have all the info,I wonder if the Tornado was from that same line that went through Southern Berkshire?Thank You.

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