Searching for rain: More widespread rainfall likely Sunday

Many parts of Minnesota could see 0.5 to 1 inch of rainfall Sunday

“The trend is your friend.” -Craig Edwards former MPR and NWS Twin Cities meteorologist.

My former partner in weather crime Craig Edwards said it well. Established weather patterns tend to persist. It often takes a major change in the hemispheric upper airwave pattern to break out of drought or a wet pattern.

There are some signs we could see a moderate shift in the weather pattern across the Upper Midwest as we head into next week. That will bring much cooler air and may bring us multiple opportunities for rain next week.

Sunday rain chances

Spotty thundershowers cross Minnesota again Friday evening. Saturday brings another beautiful (but dry) summer day with highs in the 70s north and 80s south.

Forecast high temperatures Saturday
Forecast high temperatures Saturday
NOAA

By Sunday, a wetter low-pressure system crosses Minnesota. Rain and thunder coverage looks more widespread. NOAA’s GFS model is typical of those painting widespread rain and thunderstorms moving eastward across Minnesota Sunday.

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NOAA GFS model Sunday
NOAA GFS model Sunday
NOAA via tropical tidbits

A decent soaking?

Sunday’s rains do not appear sufficient to ease the deepening drought in most of Minnesota. Most forecast models suggest 0.5 to 1 inch of rain for many locations. Some lucky spots could see more than an inch.

European model (ECMWF) precipitation output
European model (ECMWF) precipitation output through Sunday.
ECMWF via pivotal weather

As always with summer convective rains, your results may vary.

Cooler with rain chances next week

The upper air maps for Monday show a break in the trend that will bring much cooler temperatures to Minnesota early next week. See the dip across the Upper Midwest? That will pull some free AC down from Canada.

Upper air forecast map for 7 pm Monday
Upper air forecast map for 7 pm Monday
NOAA

Monday may be a bit of a shock to the system with highs in the 50s and 60s across Minnesota.

Forecast high temperatures Monday
Forecast high temperatures Monday
NOAA

Some forecast models hint at additional rain chances next week.

Stay tuned.