National Weather Service Weather Forecast Office

The National Weather Service office in Paducah will be using the following criteria for the issuance of Heat Advisories and Excessive Heat Warnings:

• Heat Advisory:

Maximum daytime heat index of at least 105 degrees AND / OR maximum actual air temperature of at least 100 degrees

• Excessive Heat Warning:

Maximum daytime heat index of at least 110 degrees and minimum night-time low temperature of 75 degrees or higher for at least a 48-hour period

If Heat Advisory criteria are met for four consecutive days or more, the advisory may be upgraded to an Excessive Heat Warning  

Note: Sub-advisory heat indices of 100 to 105 degrees are highlighted in the Hazardous Weather Outlook and headlined in the Zone Forecast Product.