Extreme Temperature Diary-October 2, 2018/ Topic: A Hot Florida And Other September Climatology

guyonclimate_mi5tor

Tuesday October 2nd… 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)😊.  Here is today’s main climate change related topic:

A Hot Florida And Other September Climatology 

It’s time to start posting the usual climatology for the prior month, September. I’m getting some indications that Florida may have had its hottest September in recorded history, and that most of the southeastern United States had well above average temperatures. The U.S. as a whole probably had a near top ten warmest September. And Yikes! The lower 48 states probably had its warmest May-September in recorded history (since 1895). Let’s investigate some of the data behind these claims.

First, let’s see why I am thinking that Florida had its warmest September by looking  at stats from some of its largest cities:

“SEPTEMBER 2018 WILL GO DOWN AS ONE THE WARMEST AND MOST HUMID MONTHS ON RECORD IN JACKSONVILLE. RECORDS DATE BACK TO 1871”

1:56 PM – 1 Oct 2018

  Note that Jacksonville was uncomfortably humid, as well. Let’s continue:

Yikes! Tampa incinerates September monthly temperature record by over 2F in data going back to 1890.  Last 3 years all in the top 3 spots.

2:12 PM – 1 Oct 2018

Also the warmest September at Daytona Beach in records dating back to 1923.

2:03 PM – 1 Oct 2018

“SEPTEMBER 2018 WILL GO DOWN AS THE WARMEST MONTH ON RECORD IN GAINESVILLE. RECORDS DATE BACK TO 1890.”

1:54 PM – 1 Oct 2018
Perhaps my home state of Georgia will receive a number one hot position also when NCEI processes September climatology. Certainly Atlanta was toasty.

It’s been a hot September in my corner of the world. Atlanta’s average daily temperature will be above seasonal norms for every single calendar day.
So far through 9/28/18: AVG. MAX 90.0F AVG. MIN 72.5F  Month: +7.3F

4:08 PM – 28 Sep 2018
The southern part of my state was exceptionally warm:

Record September temperatures also at Alma GA.

1:48 PM – 1 Oct 2018

Multiple September temperature records set at St. Simons Island GA.
Data began 1948.

1:45 PM – 1 Oct 2018
Most importantly, I’m getting strong  indications that the lower 48 stares had it’s warmest May-September in recorded history looking at this data:

We’ve closed the book on the warmest cooling season (May-Sep) per population-weighted CDD measures in our records since 1950, with 1435.34 PWCDDs beating the previous record (1381.18 in 2016) by a wide margin). Of 153 total days, 134 (87.6%) yielded above 30Y normal PWCDDs.
8:43 AM – 1 Oct 2018
 
Meanwhile at the other end of the United States:

Here is a case where climate change may be intensifying unusually nice weather in Alaska as warm oceans may have helped pump up an ENORMOUS high pressure cell. Writes : “The perception is that has been the best September ever.” Read more:
11:37 AM – 2 Oct 2018
Quoting The Washington Post:

Unusually warm, dry and sunny weather has not been confined to Anchorage, which notched its warmest September on record, but has appeared in many other parts of Alaska and eastern Siberia:

  • Fairbanks posted warmer than normal temperatures for the last 20 days of September, and Nome for the last 22 days.
  • On Sunday, King Salmon hit 71 degrees, its warmest temperature so late in the season.
  • Bethel, Alaska, failed to observe any low temperatures below freezing in September for only the fourth time on record.
  • Chukotka, Siberia, posted its warmest September on record, with an average temperature nearly 11 degrees above normal, tweeted Francois Jobard, a meteorologist in Paris.

 

 Likewise, other countries have already confirmed that they had their hottest May through September in recorded history:

Like some other European countries, had its warmest January-September since records began in 1881 and 2.3°C above the long term 1961-1990 average, says

3:51 AM – 2 Oct 2018
    
I’ll be adding more September 2018 climatology as it crosses my radar to this post later today.
…………………………………………………………………………….
Tomorrow our October heat wave will be ramping up south of a front in the norther Plains and Great Lakes. Many heat records should fall east of the Rockies:
Here are Monday’s maxes:
Indeed, most maxes across the South were above MOS guidance since climatology is built into this statistical temperature output.
Here is today’s news on Rosa:

Phoenix has already had the tenth wettest day in its history, as the remnants of push moisture into the Southwest U.S.

12:10 PM – 2 Oct 2018
 
I’m keeping my eye out for any tropical systems in the Caribbean, which is a favored area for development climatologically in October. Some of the met models do have a tropical threat next week:
6:18 AM – 2 Oct 2018

Western Caribbean is a hot spot for development in October and here’s why we’re watching it now:

11:26 AM – 2 Oct 2018

Here is some of today’s other weather and climate news:

We’ve never recorded twin Category 5 hurricanes prowling the Northwest and Northeast Pacific at the same time..until Tuesday morning, that is.

9:02 AM – 2 Oct 2018

Replying to

Including the anomalously warm ocean surface Florence passed over, just before striking NC. So warm in fact, corals were bleaching in Bermuda that week (very rare). coral bleaching photo by

(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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