Extreme Temperature Diary- Monday August 17th, 2020/ Main Topic: Western Heatwave Beelzebub Gets Historically Hot (Day 4)

Monday August 17th… Dear Diary. The main purpose of this ongoing blog 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).😉

Main Topic: Western Heatwave Beelzebub Gets Historically Hot (Day 4)

Dear Diary. Beyond unfortunately counting corpses, the easiest way to determine how historic a deadly heat wave gets is tallying the number of temperature records the event establishes. In particular, the number of all-time records. When a heat wave occurs over the western United States, such as Beelzebub, meteorologists and climatologists focus on one canary in the proverbial coal mine…Death Valley…. to judge how historic an event is. Looking at what occurred on Sunday our very first named heat wave will get listed high on the totem pole of world heat events. Of course, if Death Valley sees near an all-time record many other highly populated areas, such as Los Angeles or Sacramento see record heat, as well, as was the case on Sunday.

Today the National Weather Service along with many of my associates from the past are trying to determine if Death Valley reached 130°F on Sunday and if that is the hottest reading that has ever occurred in North America. Looking at the upper air pattern Death Valley may tie or exceed 130°F today and/or Tuesday. We will see. Here is Dr. Jeff Master’s detailed report on how Sunday’s 130°F us being judged and verified:



Death Valley, California, may have recorded the hottest temperature in world history

A weather station at the Furnace Creek Visitor’s Center measured a temperature of 129.9 degrees Fahrenheit on Sunday, August 16, 2020.

By Jeff Masters, Ph.D. | Monday, August 17, 2020

Death Valley weather station
Official weather station at the Furnace Creek Visitor’s Center in Death Valley, California. The white box houses the fan-aspirated temperature sensor. (Photo credit: Jeff Masters)

Death Valley, California hit an astonishing 129.9 degrees Fahrenheit (54.4°C) at 3:41 p.m. PDT Sunday, August 16, 2020, which was rounded to 130 degrees Fahrenheit in the final report from NOAA.

According to weather records experts Christopher Burt, who wrote the comprehensive weather records book “Extreme Weather,” and Maximiliano Herrera, who tweets under the Twitter handle Extreme Temperatures Around the World, the observation may be the hottest reliably recorded temperature in world history, breaking the 129.2 degrees Fahrenheit readings at Death Valley in 2013 and in Kuwait in 2016.

Cautions about the record

Herrera and Burt are cautious about accepting the new record set at the Furnace Creek Visitor’s Center in Death Valley. The measurement came in mid-August. But extreme high temperature records are much easier to set in July, which is the hottest month of summer. Also concerning was the fact that Sunday’s temperatures at Furnace Creek showed some odd jumps during the day. (See the raw high-resolution data here by choosing a time up to six days in the past from the drop-down menu, then choosing “Decoded Data.”)

However, there were some relevant wind direction changes at Furnace Creek that occurred during these temperature jumps, bolstering the idea that the temperature changes were real. The National Weather Service noted that transient high cirrus clouds may have played a role in the temperature changes. Further support for the 130 degrees Fahrenheit reading at Furnace Creek came from the nearby Stovepipe Wells site in Death Valley, which peaked at 125 degrees Fahrenheit on Sunday. That site, which lies in a cooler part of the valley and is 200 feet higher in elevation, is typically three to five degrees cooler than the Furnace Creek site.

Greenland Ranch weather shelter
The Greenland Ranch USWB weather shelter in Death Valley, California, site of the official world record extreme temperature of 134 degrees Fahrenheit on July 10, 1913. Photo is the oldest known photograph of the weather station (circa late 1910s to as late as 1921) and is looking west. (Image credit: NWS Las Vegas archives via Chris Burt)

The official world record will remain 134°F

“If Sunday’s observation passes an investigation (instrument calibration, etc.) then, yes, this a new reliably measured global extreme heat record,” Burt wrote by email.

But the observation will not count as an official world record. In 2013, the World Meteorological Organization officially decertified the official all-time hottest temperature in world history, a 136.4 degrees Fahrenheit reading from Al Azizia, Libya, in 1923. (Burt was a member of the WMO team that made the determination.) After the abandonment of the Libya record, the official world record was given to a 134 degrees Fahrenheit measurement taken at Death Valley on July 10, 1913.

However, this record has been strongly disputed by Burt and Herrera.

“The old Death Valley record from July 1913 is 100% bogus (not just 99.9% such), as are all other temperature readings of 130 degrees Fahrenheit or higher from Africa in the past,” Burt said.

Burt wrote a detailed 2016 blog post at Weather Underground challenging the 1913 record at Death Valley, explaining that official readings of 134, 130, and 131 degrees Fahrenheit taken on July 10, 12, and 13, 1913 were likely the result of an inexperienced observer. In order for the 1913 Death Valley record to be decertified, though, an official World Meteorological Organization investigation committee would have to be assembled to look into the matter, a years-long process for which there is currently no motivation.

The only other temperature of at least 130 degrees Fahrenheit officially recognized by the World Meteorological Organization is a 131-degree reading at Kebili, Tunisia, set July 7, 1931, which is considered to be Africa’s hottest temperature.

Burt disputed this record: “I mentioned to the WMO about the Kebili temperature of 131 degrees Fahrenheit back in 2012, when asked what I thought the next hottest temperature in Africa (after Al Azzia) might be, since that was the only temperature over 130 degrees Fahrenheit that had an actual date attached to it. However, the Kebili ‘record’ is even more bogus than even the Al Azzia record, and I said so. Kebili is a relatively cool spot in Tunisia (an oasis) and never since the 1930s ever again recorded a maximum temperature above 118 degrees Fahrenheit. The WMO wanted something for their ‘Africa’ section at that time, and somehow the 131 degrees Fahrenheit made it into the database with no consideration of its validity whatsoever. Nowhere in Africa has any reliably observed temperature been measured above 126 degrees Fahrenheit.”

A weird weather day in California

Another argument supporting Sunday’s 130 degrees Fahrenheit measurement at Death Valley was the unusual weather setup over California.

“I’m coming around to thinking that this 129.9° reading just might be for real,” Burt said. “For one thing, the weather today in California has been unique. All kinds of strange local weather occurred. In fact, the folks at most of the state’s National Weather Service offices are saying there has never been a day like today in recorded history in the state: all kinds of weird dynamics at work and the models just can’t handle the details.”

Yale Climate Connections contributor Bob Henson had these observations on Sunday’s weird weather in California: “Among the strange developments over the weekend in California were a highly unusual round of pre-dawn thunderstorms in the Bay Area on Sunday, with only scant rain but profuse lightning that started multiple new wildfires. More than 4,800 lightning strikes were recorded in California on Saturday alone. Also on Saturday, a fire-based thunderstorm (pyrocumulonimbus) in Lassen County spawned what appear to be multiple fire whirls and ‘fire tornados,’ as indicated by radar and documented in photos and videos. The storm prompted what is apparently the first-ever NWS tornado warning related to pyrocumulonimbus. It will take further study to establish how many vortexes developed and how many might have been fire whirls (smaller-scale, shorter-lived spin-ups akin to dust devils) versus more unusual fire tornadoes, which extend up into a pyrocumulonimbus and which can generate surface winds of more than 100 mph.

PHOTOHeat waves and climate change: Is there a connection?

“These events are related to an infusion of moisture from the tropical northeast Pacific, some of it from ex-Hurricane Elida, coupled with one of the strongest, hottest upper-level domes of high pressure ever recorded across the western United States in August. When such air is forced to descend, it warms up even more, which can lead to record-setting temperatures at the surface.”

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Today I will be posting more social media notes on Beelzebub. As usual, the most important and most recent will appear at the top of the following list with more getting added as Monday progresses:

Here are more “ETs” from Sunday. I’ll be adding those from Monday later today:

Here is more climate and weather news from Monday:

(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. In most instances click on the pictures of each tweet to see each article. The most noteworthy items will be listed first.)

Now here are some of today’s articles and notes on the horrid COVID-19 pandemic:

(If you like these posts and my work please contribute via the PayPal widget, which has recently been added to this site. Thanks in advance for any support.) 

Guy Walton “The Climate Guy”

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