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Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Overview

Widespread showers associated with an area of low pressure grew into low-topped supercells across eastern Minnesota during the afternoon as the activity encountered greater instability. Strong low level shear helped produce six tornadoes from central and east central into northwest Wisconsin. There were three EF1 tornadoes and three EF0s. To many, the Silver Lake tornado appeared stronger than an EF1, but this was likely due to the high amounts of moisture in the air which allowed the condensation funnel to grow large. Damage along its path suggested a peak wind speed of 105 mph, a high end EF1.

 

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