24 Hour Rainfall Totals and Storm Severity Ratings

Rainfall is measured to assess storms and their effects on flooding and sewer performance and design.

Rainfall location color icons indicate rainfall totals and maximum storm rating during the past 24 hours. Data is sent once 2mm is accumulated in each gauge, so timing will vary.

Website is updated every 15 minutes. Higher storm ratings and rainfall totals may have occurred if a storm lasts more than 24h. Storm ratings and rainfall are based on data at the gauge location only - nearby areas may experience differing conditions due to variability of rainstorms.

Rainfall is measured between May and October; snowfall is not measured.

降雨量测量旨在评估风暴及其对洪水及排水系统性能与设计的影响。降雨位置的颜色图标用以指示过去24小时内的降雨总量及最大风暴等级。数据在每处测站累积达到2毫米时发送，因此发送时间存在差异。网站每15分钟更新一次。若风暴持续时间超过24小时，则可能存在更高的风暴等级和降雨总量。风暴等级和降雨量仅基于测站位置的数据——邻近区域可能因风暴的差异性而经历不同的天气条件。降雨量测量时间为每年的5月至10月；降雪量则不予测量。