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On Weather & Climate Through the Eyes of Mark Vogan
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Weather Talk
By Mark Vogan
Indian Summer returns as High to the UK's north ushers in 60s and 70s to Scotland, 73 degree heat in Wales, but will it last?
Today marked the return of Indian summer as high pressure positioned north of Scotland ushered what was cold east winds onshore along the UK's east coast, however despite the 10 to 12C temps, mist and cloud from Caithness to Kent, interior areas warmed nicely into the 60s, that's upper teens C. Interestingly, areas "west" of the mountains, say in Wales, west of the Pennines in England and locations in far western Scotland where the bulk of the Highland peaks are located to the east, these places faired the best with abundant, seemingly unlimiated sunshine, certainly up until 4pm or in spots into this evening. These locales saw a phenomenen known as "downslope compressional warming". This occurs when winds blow up, over and down the leeside of the mountains. As these winds downslope, they compress the air and as they compress, the air heats up.
This is why with an east wind blowing across the country, areas that are on the other side of the moutains both enjoyed the rain shadow and on a day like today, "lack of cloud" as those clouds and mist that formed, got stuck on the windward side of hills, therefore on the other side both winds downsloped and brought 70-degree heat as well as sunny skies.
It appears, that the warmest high I saw according to my own look at 3pm Met Office obervations was at Valley in Wales where the temperature was at 23C, that's a respectable 73 degrees. Meanwhile, as of 4pm, that number as well as many others dropped, likely due to clouds and wind alterations, plus one must remember that the peak heating of the day hits earlier!
As for up here in Scotland, Glasgow appears to have peaked at 61 degrees, but in Prestwick, the sun was abundant and the peak there appears to have topped 67 degrees. The warmest spot in Scotland looks to have been Lusa on the Isle of Skye where a reading as of 4pm was 21.1C, that's 70 degrees...
Here at my house, the combo of strong east wind and more importantly the low hanging mist and clouds has held the temperature at a modest 60 degrees.
The typical warm spots of the southeast of England appeared to have topped off at a pleasant, yet modest 70 or 71 degrees around Greater London, bear in mind, those brik east winds likely blew all the way up the Thames estuary, holding daytime highs to a modest 70 degrees, rather than 74 or 74, like it could easily be, even at this late stage in the year!
There's always tomorrow of course and highs do appear to be forecast to top in low to mid-60s for the Scottish Central Belt between Glasgow and Edinburgh, 70 for Manchester and Birmingham and perhaps a slightly warmer 74 or even 76 for the London area, this is before cooler air returns and lets face it, it's never hard to fin now that we're at Oct 8th.
Vagaries of the Weather
India & Sub-Continental Asia Weather
By Rajesh Kapadia
Bay Depression Update @ 8.30 pm, Friday 8th. October:
The depression has crossed the coast on the W.Bengal /Bangladesh coast near Mongla, today (Friday) late afternoon.
Heavy rainfall has been recorded in the path of the depression.
The heaviest of the rains on Thursday/Friday were in Orissa, with Paradip receiving 252 mms, Chandbali getting 137 mms, Balasore 103 mms. In the NE, it was Cherrapunji which measured 217 mms of rain and Shillong 54 mms.
In W.Bengal too it was Canning Town with 76 mms, Diamond Harbour 68 mms, Digha 59 mms.
Even in East M.P, Khajuraho came up with 36 mms.
Anyway, the depression is now set to go towards the NE states of India, thru Bangladesh. By Friday evening, after crossing inland, it has weakened to 1004 mb from 998 mb, as is set to weaken rapidly to become a low pressure.
The westerly wind exodus of the last couple of days along the Kerala coast, towards they system, has also subsided.
We can expect very little rain now for the next 4 days in Kerala/T.N. and Karnataka. We'll wait for the next system from the Bay, expected around the 13th. of October.
Check out our Partner's Blog HERE for the latest and greatest weather across Asia and the sub-continent!
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The Extremes of the Day
Today's US Extremes
Courtesy of AccuWeather
High: 94 degrees at Indio, CA
Low: 19 degrees at Bodie State Park, CA
Today's UK Extremes
Courtesy of the Met Office
High: 74 degrees at Chivenor (Devon)
Low: 36 degrees at Drumnadrochit (Loch Ness)
Today's Extremes here at my house
High: 60 degrees
Low: 51 degrees
Thanks for reading.
-Mark
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