patchy

"Our current understanding is really patchy, because it's really, really difficult to measure," he said.

Some patchy rain likely in north-west Scotland, too.

The dreary trend is forecast to kick off Friday morning, with the possibility of a “patchy drizzle” developing from a deep marine layer over much of the region, according to National Weather Service forecasts.

While a lot of the rain will be light and patchy and some places will escape it altogether, this weekend heralds a return to more typical April conditions.

Many areas will see low clouds and patchy fog in the mornings and evenings during the weekend and into next week.