We're looking at big changes in the temperature department next week! High temperatures could be dropping near 30° from Friday to next Wednesday. A strong upper-level high pressure will move east across Canada forcing a strong upper-level ridge to develop across the upper Midwest. This will force cool and dry air from Canada into SE Minnesota and NE Iowa.
Temperatures most of the next week will be stuck in the middle and even lower 50s Wednesday through Saturday. Overnight lows will drop into the lower 30s and we could experience our first widespread frost of the season. The average first frost in Rochester is around October 1st. So this isn't too uncommon this time year. It will just be a little bit of shock dropping from the 80s Friday and Saturday to the lower 50s by next Thursday.
RECAPPING THE RAINFALL THURSDAY:
Quick moving thunderstorms produced some impressive rainfall amounts across SE Minnesota Thursday morning. Olmsted County saw the most rainfall with amounts ranging from 1.20" at the airport to 3.50" in some parts of Rochester.
We received just over 2.00" of rain on the weather patio here at KTTC. Most of Rochester experienced 1-3" with the storms on Thursday.
Most of NE Iowa missed out on the rain opportunity on Thursday, but there could be another chance for showers on Saturday. Another small disturbance could bring some isolated showers Saturday afternoon and evening. Confidence isn't high on widespread rainfall yet for Saturday.