* WHAT…Heat index values of 100 to 105.
* WHERE…The Tri Cities, Thumb, and US-23 corridor of Southeast
Michigan.
* WHEN…Until 8 PM EDT Tuesday.
* IMPACTS…Hot temperatures and high humidity may cause heat
illnesses.
* ADDITIONAL DETAILS…Little to no relief is expected at night as
temperatures only fall into the mid and upper 70s and heat index
lingers around 80.
No watches are valid as of Mon Jun 23 16:45:02 UTC 2025.
No Mesoscale Discussions are in effect as of Mon Jun 23 16:45:02 UTC 2025.
SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK…
SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK…
The FAA is modernizing the Notice to Airmen (NOTAM) system to improve the delivery of…
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