Heat Advisory: Southern Centre; Huntingdon; Mifflin; Juniata; Franklin; Southern Clinton; Southern Lycoming; Union; Snyder; Montour; Northumberland; Columbia; Perry; Schuylkill; Cumberland

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Heat Advisory — Southern Centre; Huntingdon; Mifflin; Juniata; Franklin; Southern Clinton; Southern Lycoming; Union; Snyder; Montour; Northumberland; Columbia; Perry; Schuylkill; Cumberland Severity: Moderate. Certainty: Likely. * WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 109. For the Heat Advisory, heat index values up to 103 expected. * WHERE...A portion of central Pennsylvania. * WHEN...For the Extreme Heat Warning, until 8 PM EDT Friday. For the Heat Advisory, from 8 PM Friday to 8 PM EDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...High temperatures will exceed 100 degrees in many places today and Friday with even higher heat index values expected. Temperatures will be a few degrees lower on Saturday, but heat risks will continue.