Another wintry storm Friday

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Some smoke from Canadian wildfires will remain in our air into Friday evening, then conditions will improve later Friday night.

 continues an air quality alert (shaded orange) across much of Minnesota until 11 p.m. this Friday:

Air quality could reach the orange (unhealthy for sensitive groups) category at times. You can check hourly current air quality readings at the 

The Wisconsin Department of Natural Resources has posted an air quality advisory for all of Wisconsin until 11 p.m. Friday. Air quality could reach the orange category. 

Here are the various air quality categories that are used by pollution monitoring agencies:

Much of Minnesota had air quality index readings slightly below 100 at 3 p.m. Friday, but a few spots were slightly over 100.

Our average Twin Cities high temperature is 81 degrees this time of year.

Saturday high temps will be well into the 90s in many areas, including the Twin Cities:

Dew points will reach the steamy 70s Saturday afternoon:

That combination of heat and moisture will push heat index values over 100 degrees in many locations Saturday afternoon into Saturday evening.

The National Weather Service has issued an excessive heat warning from 1 p.m. to 9 p.m. Saturday from south-central Minnesota through the Twin Cities metro area and several adjacent counties:

A heat advisory (orange) covers many additional counties from 1 p.m. to 9 p.m. Saturday.

Here are details of the excessive heat warning:

You can hear updated weather information for Minnesota and western Wisconsin on the MPR News 

Temperatures retreat a bit on Sunday, with highs ranging from 70s in far northern Minnesota to upper 80s in the far southeast:

Highs in the 90s return to southern Minnesota and the Twin Cities metro area on Monday:

Twin Cities metro area highs are projected to reach the mid 90s on Tuesday and Wednesday.

Most of Saturday and Sunday will be rain-free in Minnesota and western Wisconsin. A stray shower is possible in northwestern Minnesota late on Sunday.

The National Oceanic and Atmospheric Administration’s North American Mesoscale (NAM) forecast model shows the potential rain pattern from 5 a.m. Saturday to 6 p.m. Sunday:

Hurricane Hilary is a category 4 hurricane in the eastern Pacific, with max sustained winds of 130 mph. Hurricane Hilary is expected to bring destructive winds and flooding rains to Baja California and portions of southern California and Nevada this weekend into early next week.

Here’s the forecast track, plus the cone of uncertainty, for the center of Hurricane Hilary:

Hilary is forecast to be a tropical storm when its center moves over far southern California Sunday night.

Here are potential rain totals for this weekend and into the start of next week:

This is the afternoon update on Hilary, from the 

The National Hurricane Center will issue updates on Hilary every three hours or so.

You can hear my live weather updates on MPR News at 7:35 a.m., 9:35 a.m. and 4:39 p.m. each Saturday and Sunday.

Weather and Climate News

Updraft® - Minnesota Weather News

Ron Trenda

Author

We’ll have hot temperatures and steamy dew points Saturday afternoon into Saturday evening. Excessive heat warnings and heat advisories cover much of Minnesota and parts of western Wisconsin during that time.

Excessive heat warning Saturday afternoon/evening; cooler Sunday

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