Looking at SEPA automatic rain gauge data for this area the Bush Estate (2 miles to south) had a total 2 day rainfall of 141.6 mm (Swanston 146.2 mm). Other nearby SEPA sites are all greater than 100 mm. Whenever we have NE'y winds a high volume of precipitation is not unusual. This is the setup which has led to heavy snowfalls in recent years-although the snow cover doesn't last more than a few days. I presume the air off the sea is forced to rise over the progressively rising ground producing enhanced precipitation.
The resulting traffic chaos was the worst I have seen up here. The nearby bypass was closed by floods from mid afternoon to late evening. Sat Navs then direct traffic onto our road which suffered similar queues.
I should add that I use a SEPA standard 5" gauge which does not appear on their map. I'm out there at 0900 h every morning.
George, swanston, Edinburgh