London warms to 22°C under jet stream ridge while ex-Hurricane Isaias trigger 15.9mm rain and strong gusts in Glasgow

A battle between ex-Hurricane Isaias’s remnants and a French high leaves the UK mostly dry Wednesday. Thursday brings a day of contrast: jet-fueled winds and 15.9mm of rain drench Glasgow at 12°C, while London warms to 22°C. Friday rain hits the Midlands before a huge Atlantic high arrives Saturday. Why does this split happen?

Ex-Hurricane Isaias is no longer a monster, but it remains a formidable atmospheric catalyst near the UK, a Mr Fantastic storm still stretching its influence across the Atlantic. The 300 hPa wind video shows the story clearly. Isaias is bending the jet stream, and that curve is the engine behind Thursday’s split.

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On Wednesday, the jet stream crosses central England, keeping the south dry. On Thursday, it sharpens into a jet streak over Scotland, driving intense gusts and heavy rain into Glasgow. By Friday, it relaxes before a massive Atlantic high settles for a dry Saturday.

A jet stream split drives north-south contrast

Wednesday will open quietly for most, as a French high holds a ridge across southern and central Britain, keeping most cities dry.

As the Icelandic low, the remnant of Isaias, dips south, its …….