Honister Pass supplemental

Courtesy of OS Maps

I thought that I would try and find out in a supplemental to yesterday’s post a little more background into the ‘record’ June rainfall event in the Cumbrian mountains. It looks to me that the EA rain gauge above the old slate mine on the Honister pass will tend to funnel wind and rain from the west or northwest, and again winds from the E’NE, but get some degree of protection from other directions. It is situated at approximately 360 m above sea level above the mine. I was too late to capture the raw 15 minute data for the 28/29th of June, but on the graph from the EA website I see that the bar chart indicates that there was almost 250 mm on the 28th. That’s higher than the 212.8 mm in the 09-09 UTC period, because it’s likely that this was the 00-00 total, and I don’t know if that’s BST or UTC!

Courtesy of the OS

There is another EA rain gauge in the area besides the one a the top of the Honister Pass, and that’s down in Seathwaite village in the Borrowdale valley. The corresponding bar chart for rainfall on the day in question shows ~185 mm (00-00), Seathwaite is ~125 M amsl and does tend to support the much higher reading at the top of the pass at 360 M.

Here is a plotted grid of 36 hours observations from Keswick, the nearest SYNOP station to this part of the Lake District. The wettest spell looks to have been the 00-00 UTC period on the 28th rather than the 09-09 UTC period ending on the 29th. It’s just a shame that the UKMO the EA and SEPA can’t come together and pool all their observational rainfall data into one API for everyone to access in real time.

Keswick observations
12 UTC Sunday 28th June 2020
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