A frontal boundary is hooking up with a weak area of spin in the mid levels of the atmosphere to create severe storms along the I-90 corridor this afternoon. Warnings for tornadoes from near Worthington to Jackson were issued between 2:30 and 3:15 p.m. CDT.
Satellite images depict the blossoming storms at mid afternoon, and more are likely to develop in South Dakota and Iowa the remainder of the afternoon and evening.
3pm visible satellite. Source: NOAA/College of Dupage
The Storm Prediction Center posted this tornado threat for this evening.
Source: NOAA SPC
While the percentage mean seem low, tornadoes have already been reported.
There will likely be a break in the stormy and wet weather early Saturday before more storms erupt on Saturday night. Be prepared for showers and thunderstorms during the darkness hours on Saturday and into Sunday morning. Locally heavy rain is possible.
We could catch a break and experience a lengthy period of dryness from Saturday afternoon into the evening.
Sunday’s maximum temperatures will barely make it into the 60s in southeast Minnesota. Fifties are likely in the north.
Rainfall potential from the NOAA Environmental Prediction Center for Saturday night and Sunday:
We could use the moisture, but timing could be better.