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Unusual weather trivia that is hard to google

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#301
Scott

Posted 10 December 2017 - 09:35 PM

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The city is Brownsville Texas (106F on March 27 1984).   In that part of Texas, late winter and early spring heat waves are surprisingly common.   The hottest temperatures in much of Mexico are often recorded in the Spring and occasionally the hot air makes it as far north as Texas.

 

 

To add some more to this, April 1920 and April 2014 had really impressive temperatures that set all time heat records in that part of the US (southern Texas).

Here are some of the all time heat records (for anytime of year) that were set in those Aprils:

McAllen (not the airport) (1941-present):  109 on 4/28/2014

Mercedes 6SE (1914-present):  110 on 4/17/1920
Sarita 7E (1910-present): 109 on 4/28/2014
Weslaco (1914 to present): 110 on 4/17/1920

Not quite the all time record, but 2nd or 3rd hottest:

 

Harlington (1912-present):  107 on 4/17/1920, the second highest temperature recorded.  Only 8/18/1915 had a higher temperature (108).
Port Mansfield (1958-present): 102 on 4/28/2014, the second highest temperature recorded.  Only 5/11/2006 had a higher temperature (104).

Kingsville (1951-present):  108 on 4/28/2014, the third highest temperature recorded. Only 9/5/2000 (109) and 9/6/2000 (111) were hotter.

There are probably more than the above.  If more stations were present in 1920, several more records likely would have been recorded.


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#302
Glacier

Posted 11 December 2017 - 11:12 AM

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Those areas can definitely see downsloping, even though they're on islands. Plenty of high topography there to aid the process. For instance, Pelican (even further west than Tenakee Springs) hit 92 in the mid-August 2004 heat wave. This event produced 91 in Skagway and an all-time record of 88 in Yakutat. As an aside, the summer of 2004 was pretty special in SE AK and adjacent parts of Canada. All-time records in both June and August. 

 

Also, the Tenakee Springs station only existed for 14 years (1969-1983). Difficult to draw long-term inferences from that short of a period of record. It may have been that 1976 was the only episodic downslope event in that era...conceivable for a 14 year stretch, IMO. 

 

 

In 2009 here in BC it was over 41C/106F in Vancouver Island. Even on some of the cool outcrops and lighthouse stations it was near 90F. While the coast is normally cool, once in a while you get strong outflow winds from the interior, and downsloping causes temperature records to be broken by 5 or even 10 degrees.

 

Take for example Bella Coola on the central coast of BC. The hottest it has even been at the airport since records began 1983 was 36.3C/97F. In 2009, it was 41.2C/106F. That's 9F hotter than it's ever been, and the record is totally legit. To the west of this place on northern Vancouver Island at a place called Gold River a temperature of 41.5C was recorded (temperatures rounded to the nearest 0.5C at that station). Many places shattered the all time records on the coast including the likes of Kitimat on the north coast, while communities in the interior that frequently hit 40C/104F reached what they'd normally achieve in a typical year.

 

So, yes, one-off records on the Alaska coast can be legitimate records.



#303
Scott

Posted 07 January 2018 - 10:38 PM

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Here's another good question and one I don't know if I have an answer for.

 

For the weather stations/past data located on the high mountain peaks in the US (there aren't that many, but mainly Mt Washington, Pikes Peak, Mt Rainier, White Mountain Peak, and White Mountain 2, why would Pikes Peak have the smallest diurnal temperature changes?

 

http://www.summitpos...-summits/171585

 

Other than the White Mountains his seems that opposite of the other areas surrounding the mountains in each region.



#304
Phil

Posted 09 January 2018 - 03:21 PM

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Is this true throughout the year? Or just part of the year?

If it’s the former, I’m guessing it has something to do with where/how the station is sited (lower thermal conductivity of the landscape around the station). But that’s honestly just a guess.
Personal Weather Station, Live Stream on Wunderground: https://www.wundergr...BETHE62#history

Cold season 2017/18:
Total Snowfall: 9.8”
Largest Snowfall: 3.4”
Number of winter events: 13
Coldest High: 17.2*F
Coldest Low: 2.8*F
Lowest Dewpoint: -6.7*F
Highest Sustained Wind: 37mph
Highest wind gust: 54mph

#305
Scott

Posted 12 January 2018 - 07:30 AM

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Is this true throughout the year? Or just part of the year?

If it’s the former, I’m guessing it has something to do with where/how the station is sited (lower thermal conductivity of the landscape around the station). But that’s honestly just a guess.

 

Except for Rainier in the winter months, it is year round.



#306
erik1974

Posted Today, 01:09 PM

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      Anyone here care to comment on one of the most unusual and freakish heat waves of all time??  I am talking about the upper-Midwest events of May 1934.  So intense the highest May temperatures actually equal or exceed the highest ​June ​temperatures in at least 3 states.  Anyone care to comment on this extremely underrated event?