Extreme Temperature Diary-November 1, 2018/ Topic: Potpourri Of October Climatology

Thursday November 1st… Dear Diary. The main purpose of this ongoing post will be to track United States extreme or record temperatures related to climate change. Any reports I see of ETs will be listed below the main topic of the day. I’ll refer to extreme or record temperatures as ETs (not extraterrestrials)😊.

Potpourri Of October Climatology

Welcome to November everyone. It’s the first of the month so it is time to post incoming climatology messages issued by various agencies across the planet, with an emphasis on what happened across North America for October 2018. Despite the overall warmth of the planet due to carbon pollution there were various cold pockets with below long term temperature averages. 

As far as the United States goes, Radiant Solutions posted these summaries today:

It’s hard to describe October simply using monthly WDDs. If you look only at PWCDDs (2nd highest since 1950) you’d think “wow what a warm month.” If you only look at GWHDDs (25th highest since 1950, 1st above normal since 2009) you’d think “wow what a chilly month.”

Basically we ended up with a near average month in the state for temperatures with above average warmth in both coasts and chilly conditions occurring for the bulk of the central CONUS. The well above average warmth in the Southeast enabled Michael to become an extremely powerful, deadly hurricane for the Panhandle of Florida and South Georgia early in the month.

As October 2018 progressed, though, it go much warmer in the West, and we saw a cooling trend in the  East:

Oct 1-10 had nearly double PWCDDs 61.3 than GWHDDs (34.0) as the eastern half saw impressive warmth. Then, a two-week period of chill was seen from Oct 11-25, with the GWHDD total of 188.3 ranking 8th-highest since 1950 for that period. Things then ended warmer Oct 26-31.

Cooler than average conditions in the southern Plains was also accompanied by very wet weather. Dallas was near ground zero for some very heavy inundations:

Our big neighbor to the north stayed cool since the dipole trapped cold air aloft and at tge surface over most of Canada:


 We’ve been keeping an eye on Barrow Alaska where exceptional warmth has been occurring the last few years:

During October Alaska had exceptional above average warmth:

Upper level ridging, which is part of  the dipole, that has kept most of the West warm and dry has been extending northward to Alaska as apparent by these mild averages.

I’ll be adding more climate message notes for October 2018 to this post the next couple of days. Drop me a note if you have some other data you would like to see posted.


Here is some other weather and climate news from Thursday:

(As usual, this will be a fluid post in which more information gets added during the day as it crosses my radar, crediting all who have put it on-line. Items will be archived on this site for posterity.)

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The Climate Guy

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