Autumn Is Right Around The Corner....Cool Air Is Too

Summer is waning, the temperatures are falling and the birth of a new season is only days away. Following extreme heat, lack of rainfall, and drought-like conditions, we need a weather attitude. Change is on the horizon, and we had a taste of that recently. Weekend clouds brought a steady dose of rainfall and temperatures that were nearly 20 degrees below average. Its only a sign of things to come for us.

What is great about Autumn is that its a transitional season. Meaning that there will be spurts of warm and cold air. Between these dramatic changes are typically weather events that generate precipitation as a reaction to moving air masses. Colder air is beginning to build up in Canada, and summer heat starts to shrink. Due to the increase in colder air to our north, cold fronts will have enough of a supply to make it all the way down to Texas more often. Therefore, expect additional temperature swings as well as increased rain chances.

Note: Autumn officially starts at 9:49 CDT, this Saturday, September 22nd.

Recently, temperatures around our region have been especially easy, and there is plenty more to come.

 

Besides the southwest, where the air heats up to the 90s, there is NO extreme heat across the county. Note where the temperatures take the most significant turn, where the color coded contours turn from orange to yellow and green. Within that transition zone is another cold front, reinforcing a cool shot of rain for the Rockies and upper Mid-West.

 

 

A band of clouds ahead of this front will zero in on the Brazos Valley tomorrow morning/early afternoon. This is not the most dynamic front, but we will have an isolated shower around, but most of us will feel the cool northerly breeze behind the front. And yes, there is a substantial supply of colder air well north of this into Canada.

 

 



There are two distinct regions of cooler air. One being on the east side of Canada, around James Bay with thermometer readings only in the 30s, and an additional pool of polar chill on the far west side of Canada, into Alaska. Both of these waves will move into the lower 48 this week, with the core of the chill around the Great Lakes, with a piece coming into Texas.

 

Above the the 300mb (Jet Stream) map of the first wave of cold air entering the Great Lakes tomorrow afternoon. Lows by Wednesday morning from areas between Minneapolis and Green Bay will fall into the 40s and even 30s.....Brrrrrrr. Not as chill here, but we will notice it. We should expect morning lows by Wednesday to dip into the upper 50s! And we are not done yet, the second wave on the west side of Canada will move in by Friday.

 

 

The amplitude is even deeper by Friday. This is all pointing towards seasonal changes, therefore, the weather responds. The time for us to wear jackets will come back soon. 

 

Overall, temperatures will be down, but a whole lot of sunshine is in our forecast for the reminder of the week and into the weekend.

 

Remember: When the front passes tomorrow, a small shower can pop up, but Tuesday will be mostly dry and comfy.

 

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