Not caver related, but there is a rain gauge at Priddy, showing 1, 6 & 24 hour totals.
Click on the river link to see what effect it's had on Cheddar Yeo (& again on name to see chart for last few days):
https://check-for-flooding.service.gov.uk/river-and-sea-levels/rloi/3410?group=rainfall
Scroll around the map to find The Axe at Wookey & Congresbury Yeo, which are the other rivers taking most of West Mendip's water, plus the Mells river and further rain gauges above Chewton Mendip & either side of Stoke St Michael, on the East
Click on the river link to see what effect it's had on Cheddar Yeo (& again on name to see chart for last few days):
https://check-for-flooding.service.gov.uk/river-and-sea-levels/rloi/3410?group=rainfall
Scroll around the map to find The Axe at Wookey & Congresbury Yeo, which are the other rivers taking most of West Mendip's water, plus the Mells river and further rain gauges above Chewton Mendip & either side of Stoke St Michael, on the East