Sunday, September 27, 2020

Large High Pressure Ridge Bringing Warm Temperatures

 After a week of rainy weather, a large ridge of high pressure is bringing sunny skies and warming temperatures to Western Washington.

First, let's take a look at total precipitation from 9/18 to 9/27.


The majority of the area receives 1.5-4.0 inches, with higher totals near the mountains and in areas impacted by strong showers.

Now...rain is behind us, and beautiful fall weather is here!

A massive ridge of high pressure is over the Western US right now.


This forecast model shows 11 AM Monday. Wow! That is a very dominant ridge! Sometimes, you can feel the high atmospheric pressure in the air. Common symptoms of high pressure are headaches.

One way of measuring atmospheric pressure is inches (inHg). Normal atmospheric pressure is 29.90" to 30.20". On Sunday, pressure in Puyallup was 30.38"-30.45" all day. High pressure up to 30.50" (high for our area). Here is a graph showing pressure all week.


Notice the large pressure change between the 25th and today (Sunday). Pressure dropped to 29.68" as a strong front moved through, and in the next 48 hours it rose to 30.45", peaking on Sunday morning. A big change of 0.77 inches! (Quite high for our area).

Now that we got a crash course in our recent atmospheric pressure changes, let's talk about the warm temperatures coming to the area. 

High temperatures of 75-80 degrees are likely this week. Having temperatures this warm at this time of year is quite rare.

Here is the 10-day forecast for Puyallup from weather.com.


Wow!! Warm temperatures with highs 75-80 degrees all of this week! This will make for some beautiful fall weather! A cooldown begins by next Sunday (Oct. 4th). 

No comments:

Post a Comment

Cooler & Wetter Pattern Starts Thursday

  FastCast--Thursday, May 16 to Monday, May 20: After a relatively pleasant past couple weeks, a cooler and somewhat wetter pattern is retur...