Excessive heat warning issued

The National Weather Service has issued an excessive heat warning for a portion of Wisconsin that includes Kenosha County.

The warning is in effect from noon, Friday through 7 p.m., Saturday. The warning replaces the previously issued heat advisory.

Friday’s high could reach 91 with a possible heat index value of 103. Saturday’s high temperature could reach 95 with a heat index value of 107. Lows will be in the high 70s.

Says the NWS:

The heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature.  This has important considerations for the human body’s comfort.  When the body gets too hot, it begins to perspire or sweat to cool itself off.  If the perspiration is not able to evaporate, the body cannot regulate its temperature.  Evaporation is a cooling process.  When perspiration is evaporated off the body, it effectively reduces the body’s temperature.  When the atmospheric moisture content (i.e. relative humidity) is high, the rate of perspiration from the body decreases.  In other words, the human body feels warmer in humid conditions.

Temperatures are expected to moderate a bit starting Sunday, with a high of 89. High temperatures are expected to remain in the 80s through Thursday.



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