The National Weather Service has issued a Heat Advisory starting at 11 AM CDT lasting until 9 PM CDT today.

The combination of heat and humidity will send heat index readings into the 106 to 109 range for much of the afternoon. JSC reached 99 degrees yesterday, the hottest so far this year and only 1 degree short of a record. Today will be similar with a tad more humidity. While JSC is in the the hottest two weeks of the year on average the forecast today of 98 is in the top 10% for today.
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The NWS issues a Heat Advisory when the heat index >= 108 or the temperature >= 103 F. Please take extra precautions if you work or spend time outside.