[wxqc] Katabatic Wind Heat Spikes?

[Evan Bookbinder]

That's a fantastic example of the chinook battles that often occur in 
the Rockies.

Growing up in Rhode Island about a mile inland from Narragansett Bay, I 
experienced a similar setup in the Spring where if ambient winds were 
from the west at > 12-15 knots they would be strong enough to counter 
the sea breeze. If the speeds were just perfect, an ongoing see-saw 
battle would result with hourly temperature fluctuations on the order of 
15 to 20F.  KPVD (Providence, T.F. Green Airport) is particularly 
challenging in these regards for pilots with the airport located a 
similar distance inland to my immediate north. If you check the 
historical METAR observations, particularly in April/May, you can find 
many examples of these events where warmer westerlies would battle with 
the late morning/afternoon sea breeze.

Like your events, they are easy to differentiate from poorly sited 
instrument sun spikes given the resulting wind shifts/gusts and often 
pressure perturbations.

Thanks for sharing!
Evan



Sam Drinkard wrote:

> On Wed, 2006-01-11 at 20:54 -0500, Dave Helms wrote:
>
>>We see lots of sun spikes in stations with poor radiation shielding, but 
>>sometimes you have to believe the data! 
>>
>>Check out CW2749 in Loveland, Colorado:
>>http://www.findu.com/cgi-bin/wxpage.cgi?call=CW2749&last=72 <http://www.findu.com/cgi-bin/wxpage.cgi?call=CW2749&last=72>
>>    
>>
>
> Man, those are some wild swings!  Rather interesting articles to 
> boot.  Just curious -- I see the name Ahrens quite a bit in my 
> studies, but don't have any of his works/books/papers.  Is this guy 
> well respected within the wx community?
>
> Snowman
>
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