Tuesday afternoon and evening thunderstorms that can become heavy and cause problems with local flooding.; What happens?: On Tuesday afternoon, a band of heavy thunderstorms is expected to form, moving northwest across the area. The rain may locally become torrential and is expected to produce 30-50 mm in several places in a short time.; What should I think about?: Flooding can occur in, for example, basements and stormwater systems. Check if you can seal your basement, or move items that are at risk of being damaged by water. Clear gutters, storm drains and other waterways so that the water can flow away unimpeded. Roads and underpasses may be flooded, avoid driving through the water. Travel times may increase due to poor visibility and risk of hydroplaning. Allow more time for your journey and adjust the speed according to road conditions.; Where?: Northernmost part of Västernorrland County, large parts of Västerbotten County and the southernmost part of inner Norrbotten County.; Comments: Local variations are expected to be large