The weather warning has been issued for parts of south-west England and south-east Wales, from Monday, September 5, until Tuesday, September 6.
The severe weather will disrupt travel, as driving conditions are likely to be impacted by standing water, hail, and gusty winds, while trains are likely to be delayed.
It’s likely that some homes and businesses will be flooded or damaged by lightning or wind, and face power cuts.
Here’s everything you need to know about yellow thunderstorm warnings.
What is a yellow thunderstorm warning?
According to meteorologist Siobhan Ryan: “A status yellow weather alert is given to warn those at risk from certain weather because of their location and/or their activity. It advises these people to take preventative action. Expected weather conditions in a status yellow alert do not pose an immediate risk to the general population.”
According to the Met Office, yellow weather warnings suggest people should “be aware”. On the Met Office website, it outlines a yellow weather warning will be issued when the weather will cause, “low-level impacts, including some disruption to travel in a few places.”
It adds: “Many people may be able to continue with their daily routine, but there will be some that will be directly impacted and so it is important to assess if you could be affected.
“Other yellow warnings are issued when the weather could bring much more severe impacts to the majority of people but the certainty of those impacts occurring is much lower.
“It is important to read the content of yellow warnings to determine which weather situation is being covered by the yellow warning.”