Interesting Weather Information

Monday, August 7, 2017

Welcome to the Hottest Place on Earth

Courtesy: www.nps.gov

When the high temperature is 120° (48.9°C) or hotter 27 times in a two month period, I don't care what anyone claims about "dry heat" - it is brutally hot!

When the air is a searing 129.2° (54°C)  it is kitchen-oven-hot out there. Death Valley heat doesn't feel like the typical sultry Cincinnati summer sauna , as you walk out the door you get smacked by a blast of heat that would make you swear you got your face too close when checking the Thanksgiving turkey.

When it is that hot you do not need an assist from humidity to melt down because you are in the hottest spot on the planet.

Welcome to Death Valley National Park and Reserve, 3 million plus acres of stark reality, a national treasure has the record of the hottest recorded temperature ever on the face of our otherwise, mostly, pleasant planet. On July 10, 1913 the valley was seared by a high air temperature of 134°F (56.7°C), part of a 5-day stretch with high temperatures of 129°F (54°C) or hotter.

If that is not hot enough for you, on July 15, 1972 at Furnace Creek (what a great name!) the temperature of the ground surface reached 201.0°F (93.9°C). That may not be enough heat to liquefy the rubber soles of your shoes but they certainly will get gummy.

The hottest spots on Earth are always deserts. In wetter regions of Earth a great deal of thermal energy is used to evaporate moisture from soils and a rule of thumb meteorologists have is not to predict record high temperatures in summer if soaking rains have fallen the prior week or two.

In addition with scant shading vegetation Earth's surface receives a full frontal assault by an uncountable number of solar photons that can go right to work heating things up because of the lack of moisture in the soil.

If the desert is low, below sea level in much of Death Valley's lowest reaches, it can be even hotter.

Death Valley is dry - very dry.  The average annual rainfall is puny. According to the Western Regional Climate Center at the Desert Research Institute in Reno, NV at Cow Creek Station only 2" falls in an average year. The sandy soil is plenty dry for scorching heat each summer.

The average monthly temperature for July 2017 at Furnace Creek Ranch was 107.24°F (41.8°C), likely the hottest ever measured on Earth.

Park Map and Some Superlative Data


Created by Steve Horstmeyer using Google Earth.


A Hot Summer - Temperature Graphs May, June, July 2017

Note: Data was available in whole degrees only, so there will not be complete agreement with the official final data due to rounding. In addition the average daily temperatures  are calculated using the formula [Tmax + Tmin]/2 = Avg. A more accurate way is to sum the 24 hourly readings and divide by 24. Hourly data was not available.

May 2017 Was Hot in Death Valley
Plotted by: Steve Horstmeyer, Data: GHCN, via https://www.ncdc.noaa.gov/ghcnm/

In June the Heat Was Staggering
Plotted by: Steve Horstmeyer, Data: GHCN, via https://www.ncdc.noaa.gov/ghcnm/

In July it Was Hotter for the Month than in Any Other Place Accurately Measured, EVER!
Plotted by: Steve Horstmeyer, Data: GHCN, via https://www.ncdc.noaa.gov/ghcnm/
Just what can I say about a place that experienced three mornings in July 2017 with low temperatures hotter than 100°F (37.8°C) and 78 days out of 92 with high temperatures 100°F (37.8°C) or hotter and on 27 out of those same 78 days the temperature maxed out at 120°F (48.9°) or hotter?

Death Valley not only feels like the hottest place on Earth, the staggering numbers confirm it.

All Places and All Months on Earth with an 

Average Monthly Temperature 105°F (40.6°C) or Warmer



Data Extracted from : The Global Historical Climatology Network by  Brian Brettschneider.

See his excellent article by Christopher C. Burt, using this data, 
on Death Valley's Record Hottest Month here:




Notice that of the 39 occurrences of a monthly average temperature 105°F (40.6°C) or hotter, 35 occur in the 4 stations (Furnace Creek, Cow Creek, Greenland Ranch, Stovepipe Wells) found in Death Valley.

Christopher  C. Burt in the article linked above makes an excellent case for July 2017 in Death Valley being the hottest reliably measured average monthly temperature on Earth. The observations in Saudi Arabia at King Khaled Military City just do not pass muster.



All dates highlighted in yellow are occurrences NOT during July.

107.44
201408
King Khaled Military City, Saudi Arabia
107.24
201707
Furnace Creek, Death Valley
107.02
200207
Furnace Creek, Death Valley
106.97
200607
Furnace Creek, Death Valley
106.79
191707
Furnace Creek, Death Valley
106.74
192907
Furnace Creek, Death Valley
106.63
200507
Furnace Creek, Death Valley
106.56
193307
Furnace Creek, Death Valley
106.39
200307
Furnace Creek, Death Valley
106.38
195907
Furnace Creek, Death Valley
106.32
195907
Cow Creek
106.32
192707
Greenland Ranch
106.25
191508
Furnace Creek, Death Valley
106.21
195907
Greenland Ranch
106.20
192707
Furnace Creek, Death Valley
106.09
191508
Greenland Ranch
105.91
200707
Furnace Creek, Death Valley
105.71
194207
Greenland Ranch
105.66
192408
Furnace Creek, Death Valley
105.64
201707
Stove Pipe Wells
105.60
200607
Stove Pipe Wells
105.55
201007
Furnace Creek, Death Valley
105.53
199407
Furnace Creek, Death Valley
105.44
201507
King Khaled Military City, Saudi Arabia
105.31
201307
Furnace Creek, Death Valley
105.31
191907
Greenland Ranch
105.30
199808
King Khaled Military City, Saudi Arabia
105.30
195307
Cow Creek
105.30
195307
Greenland Ranch
105.26
199607
Furnace Creek, Death Valley
105.17
194606
Sibi, Pakistan
105.15
201607
Furnace Creek, Death Valley
105.10
196007
Cow Creek
105.10
192107
Furnace Creek, Death Valley
105.10
194207
Furnace Creek, Death Valley
105.10
200807
Furnace Creek, Death Valley
105.10
200907
Furnace Creek, Death Valley
105.04
200507
Stove Pipe Wells
105.01
195207
Cow Creek


Also notice that even though data goes back 106 years to 1911, sixteen of the top 39 occurred in the 18 years since 2000.

The long term average is 39/106 which is one occurrence every 2.7 years. Since the year 2000 16/18 which is one occurrence every 1.13 years. If the data passes quality checks this could be a strong signal of warming,

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