6.5mm

I’m enjoying the Windy weather app. Its rain radar forecast was pretty good yesterday. A 5kt north easterly at 1500m pushed one rain cell right over us after most veered either left or right. Such a thrill to see heavy rain, the sudden cool, water bombolating in the copper downpipes. The photo is of a bigger cell that missed us and grew and grew as it went over the Appenine divide towards San Sepolcro and the Tiber valley.

Apparently the atmospheric instability was caused by the insertion of cooler air at mid-troposphere (2-3000m ?) that created these impressive clouds as the heat built below them in the late afternoon. By 19.00 they’d lost their power and dissipated away.

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