It should come as no surprise that we ended up with record rain over the weekend. By early Sunday morning 2.37" of rain fell which surpassed the old record of 2.16" in 1944. Heck, Granite Ledge reported 5.46" of rain over the three-day period.
A combination of factors led to this heavy rain event. Precipitable water values (total water suspended within a column of air that extends from the surface to top of the atmosphere) were near the 95th percentile for the end of May. Also, the winds aloft began to increase causing storms to tilt (wind shear) with height. This shear was able to separate the updraft from the downdraft and with stronger "lift" in the atmosphere caused precipitation loading within the thunderstorms.
This heavy rain will likely become the norm. The frequency of days with heavy rain is projected to increase which could result in more flooding of our trail system, especially if proper trail building techniques are not practiced.
The U.S. National Climate Assessment came out earlier in May which aims to provide insight into the current status and impacts of climate change on the U.S. This report breaks down the potential climate change impacts on the Midwest in an easy to understand format. Some of the changes listed include a longer growing season, more intense heat waves and frequent heavy rain events.
The threat for heavy rain has now ended and drier air moves in this week. Despite a few isolated rumbles on Wednesday, the week looks fairly dry. Expect slightly cooler conditions for the upcoming weekend.
Tuesday: Scattered clouds. Low dewpoints (50s) H: 78 Wind: W 10
Tuesday Night: Isolated thunder L: 59
Wednesday: Isolated thunder. H: 72 L: 58 Wind: E 2-4
Thursday: Sunny. H: 78 L: 59 Wind: S 5-10
Friday: Sunny. H: 81 L: 61 Wind: SW 4
Saturday: Partly sunny. H: 78 L: 64 Wind: SE 2-4
Sunday: Thunderstorms. H: 73 L: 65 Wind: W 10-15
Summer brings warm afternoons perfect for biking, but the summer heat and humidity can also spark thunderstorms and severe weather. Be prepared for any type of adverse weather headed your way with Aeris Pulse.
NWS Twin Cities Weather Story