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Cold air advection in Stornoway post #Abigail

PostPosted: 2015 Nov 13, 19:12
by Eddy Graham
Some very cool air has advected in from the west following #Abigail yesterday: Today's daytime max here in Stornoway town was a mere +5.7C, and we have had occasional hail (graupel) and sleet showers (some heavy) throughout the day, with local thunder. Some colleagues of mine reported large drifts of hail on the roadsides across the Isle of Lewis this morning. Traffic webcams showed much lying snow along the A9 at Slochd, just south of Inverness this morning too.

However, it's nothing particularly unusual for mid-November - I can recall snow lying 2 inches deep, I think it was 13-14 November 1991.

In the end, the (assumed) stingjet / cold conveyer belt of #Abigail herself appeared to stay offshore, and here in Stornoway it wasn't a particularly severe event by Hebridean standards - the max gust at Stornoway Airport was 73mph (84mph at South Uist was the highest I saw). A very active cold frontal system did pass through during Thursday, with thunder near the back-edge of the cold front. Total precipitation was split across 2 rainfall days [6.0mm + 14.4mm] though I was expecting to measure more (I imagine there was a particularly large windloss yesterday, however, with many raindrops simply blowing over the gauge).

E. Graham, Stornoway