Steamy and stormy: Strong to severe storms likely Monday evening

Your air conditioner and your weather radio will get a good workout Monday.

A heat advisory continues until 10 p.m. for the Twin Cities. Heat index values push 100 degrees again in the afternoon.

7 15 ha

Hennepin-Anoka-Ramsey-Washington-Carver-Scott-Dakota-

Including the cities of Minneapolis, Blaine, St Paul, Stillwater,

Chaska, Shakopee, and Hastings

342 AM CDT Mon Jul 15 2019

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING...

* TEMPERATURE...Highs near 90 and dew points in the 70s will make

for heat indices around 100 degrees today. The heat and humidity

will last through the early evening with heat indices remaining

above 90 degrees through 10 PM.

* IMPACTS...The high heat indices during the day will lead to

increased risk for heat-related illness for those active

outdoors or with limited access to air conditioning.

Create a More Connected Minnesota

MPR News is your trusted resource for the news you need. With your support, MPR News brings accessible, courageous journalism and authentic conversation to everyone - free of paywalls and barriers. Your gift makes a difference.

Sunday's heat index values in Minnesota peaked at 105 degrees at Cambridge and Litchfield. I saw 102 at Alexandria and Little Falls. The Twin Cities posted a respectable 97.

7 15 hx
Peak heat index values Sunday via NOAA.

Severe risk

A weak frontal zone cuts into our steamy air mass late Monday. The short-range mesoscale models favor storm clusters developing near the Twin Cities late in the afternoon and evening.

Here's the National Oceanic and Atmospheric Administration's High-Resolution Rapid Refresh model forecast between 5 p.m. and midnight:

7 15 1 hrrr
NOAA HRRR model between 5 pm and midnight CDT via tropical tidbits.

NOAA's Storm Prediction Center paints a slight risk zone across much of Minnesota. Large hail, damaging winds, and torrential downpours are the primary threats.

7 15 risk2

Steamiest week of summer?

This will likely end up as one of the two hottest weeks of summer. Highs hover a few degrees either side of 90 all week. We'll add to the two days of 90-degree heat this year so far. The annual average is 11 days of 90-degree heat in the Twin Cities.

7 15 1 ww
NOAA via Weather Bell.

Keep your eyes and ears tuned for possible severe weather watches and warnings.