Today's Temperature Swing in Yos

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Jay Hack

Trad climber
Detroit, Michigan
Topic Author's Original Post - Apr 18, 2013 - 08:59am PT
I just looked at the weather in Yosemite...a low of 16 and a high of 76. It got me to wonder: What was the largest single day temperature swing in the valley?
donini

Trad climber
Ouray, Colorado
Apr 18, 2013 - 11:26am PT
The largest one day temp. swing in the US was 100 degrees, it occurred on 1/23/1916 in Browning, Mt. The temp. dropped from 44F to -56F.
eKat

Mountain climber
Less than a second shy of 49 minutes
Apr 18, 2013 - 11:27am PT
^^^^^ The fact that it was set in Montana doesn't surprize me. . . the fact that it wasn't Cut Bank does.

:-/
ionlyski

Trad climber
Kalispell, Montana
Apr 18, 2013 - 11:47am PT
Probably about the same temp variance in Cut Bank too but maybe not. Browning resting right up against the Rocky Mountain Front. Love it when weather kicks ass up here.

Arne
Mungeclimber

Trad climber
the crowd MUST BE MOCKED...Mocked I tell you.
Apr 18, 2013 - 12:03pm PT
Question for gstock... Does greater temp variance swing make rock fall more likely?
donini

Trad climber
Ouray, Colorado
Apr 18, 2013 - 02:09pm PT
Correction!!!!
There was a 103 degree temperature swing in Loma, Mt. on 1/15/72 when the temperature went from -54F to 49F. This is also considered a world record.

The chamber of commerce won't publish this but there is a 187 F degree difference between the highest and coldest temperatures ever recorded in Montana....-70F and 117F.

Now you know why Montana is home to Wolverines but not Roseate Spoonbills.
John M

climber
Apr 18, 2013 - 02:24pm PT
I was in college in Arkansas and went to class in the morning wearing shorts and sandals because it was warm and muggy. I got out of class and it was blizzard conditions with wind chills in the minus numbers. Brrrrr... That was a cold run back to my place. I learned to pay attention to the weather report after that. haha..
donini

Trad climber
Ouray, Colorado
Apr 18, 2013 - 02:25pm PT
That 187F differential in Montana is the most in Estados Unidos followed by:
Utah 186F.....117F and -69F
Alaska 180F.....100F and -80F
and
surprisingly
California 179F.....134F and -45F
donini

Trad climber
Ouray, Colorado
Apr 18, 2013 - 02:35pm PT
In 2004 the windchill at the observatory on Mount Washington was -103....temp -43.6, wind 87.5 mph.
The coldest recorder windchill in the world was at Vostok Station, Anarctica....-192F with an ambient temp. of -124.5F. I'm currently booking reservations for this winter....Curry Village style tent cabins for accomodations.....no mice!
Brandon-

climber
The Granite State.
Apr 18, 2013 - 09:28pm PT
-124?

WBraun

climber
Apr 18, 2013 - 09:31pm PT
Today's Temperature Swing in Yos

a low of 16 and a high of 76 ???

Where did you get that idea from?
Jay Hack

Trad climber
Detroit, Michigan
Topic Author's Reply - Apr 18, 2013 - 10:19pm PT
It's what weather.com was showing this morning although I wouldn't be surprised if that was way off. Is the weather there somewhat different from that? I remember a trip to the Mooses Tooth in the Ruth Gorge were I experienced a 75 degree swing......
briham89

Big Wall climber
san jose, ca
Apr 18, 2013 - 10:21pm PT
It was not 16 this morning. I think it was maybe lower to mid thirties
climbski2

Mountain climber
Anchorage AK, Reno NV
Apr 18, 2013 - 10:26pm PT
The coldest temperature ever accurately recorded on land was in Alaska on Denali at about 15000ft it was -100F Why this is not listed in most record compilations I do not know. At this temperature CO2 would have begun to accumulate on the surface. Thus I have never been particularly tempted to try a winter ascent of Denali.

This puts the record at a nice even 200F

According to the National Park Service, in 1932 the Liek-Lindley expedition recovered a self-recording minimum thermometer left near Browne's Tower, at about 15,000 feet (4,600 m), on Mount McKinley by the Stuck-Karstens party in 1913. The spirit thermometer was calibrated down to −95 °F (−71 °C), and the lowest recorded temperature was below that point. Harry J. Lek took the thermometer back to Washington, D.C. where it was tested by the United States Weather Bureau and found to be accurate. The lowest temperature that it had recorded was found to be approximately 100 °F (−73 °C).[42]


I have personally seen -72 and +90 in Alaska.

110+ in Las Vegas ( I seem to recall it was 117 but can't swear to that)

so my personal is at least 182 probably 189

anyone got better?

Astronauts doing spacewalks I suppose. Around 400

WBraun

climber
Apr 18, 2013 - 10:45pm PT
It's what weather.com was showing this morning although I wouldn't be surprised if that was way off.


OK thanks.

That was a terrible report from weather com.

If you want an accurate temperature report from Yosemite Valley this gauge is 30 feet from my door and operated by California govt. water resources and is linked to the internet by satellite.

Yosemite Valley:

http://cdec.water.ca.gov/cgi-progs/queryF?s=YYV

Tuolumne Meadows:

http://cdec.water.ca.gov/cgi-progs/queryFx?TUM

There is also a NOAA Temperature gauge here at the Search & Rescue office but not linked to the internet.
TwistedCrank

climber
Dingleberry Gulch, Ideeho
Apr 18, 2013 - 11:24pm PT
I was told that there would be no math or science on this test.
Ken M

Mountain climber
Los Angeles, Ca
Apr 18, 2013 - 11:31pm PT
According to WB's links, the lowest temp today in Yos was 15 deg, and the highest was 69 deg......just not in the same place.
WBraun

climber
Apr 18, 2013 - 11:39pm PT
Ken M

Yes you're correct .....

Credit: WBraun
John M

climber
Apr 18, 2013 - 11:53pm PT
I found 17 degrees at agnew pass.. 9600 feet.

http://mesowest.utah.edu/cgi-bin/droman/meso_base.cgi?stn=AGPC1

Found 12 degrees at Dana meadows..

http://mesowest.utah.edu/cgi-bin/droman/meso_base.cgi?stn=TIOC1
aguacaliente

climber
Apr 19, 2013 - 03:02am PT
The coldest temperature ever accurately recorded on land was in Alaska on Denali at about 15000ft it was -100F Why this is not listed in most record compilations I do not know. At this temperature CO2 would have begun to accumulate on the surface. Thus I have never been particularly tempted to try a winter ascent of Denali.

I regret to pick this physics nit, because CO2 sublimating out of the atmosphere would be So Cool, but it wouldn't have happened due to the low vapor pressure of CO2. The sublimation point of CO2 is -79 C (about -110 F) at 1 atm. But at 15,000 feet on Denali the pressure is probably about 0.5 atm, so even a full CO2 atmosphere wouldn't freeze out. CO2 is only a small fraction of atmospheric gas, less than 1%, so its partial pressure is much lower than that 0.5 atm, and it definitely won't freeze out.
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