Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.
from late afternoon into the evening. Leave exposed summits and ridges if thunder develops.
Burns and unbridged crossings may rise quickly. Assess them at the water and turn back if unsure.
Cloud-free timing: Around 100% early, falling to around 0% later.
A wild day on Moel Hebog: summit wind broadly 15-35 mph, with gusts 40-50 mph around midday (gale-force winds). A meaningful thunderstorm risk is indicated from late afternoon into the evening. Avoid committing to exposed ridges if storms begin to build. There could be a spate risk based on forecast rainfall. Burns and unbridged crossings may rise quickly. Most likely from around 07:00 until around 17:00. Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 3000–3300 m through the morning, lowering to 400–700 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from early morning into around midday. Some rain is likely, with around 5-10 mm indicated; timing and local totals remain uncertain.


