Heat Advisory: Warren; McKean; Potter; Elk; Cameron; Northern Clinton; Northern Centre; Southern Centre; Mifflin; Juniata; Tioga; Northern Lycoming; Sullivan; Southern Clinton; Southern Lycoming; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon

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Heat Advisory — Warren; McKean; Potter; Elk; Cameron; Northern Clinton; Northern Centre; Southern Centre; Mifflin; Juniata; Tioga; Northern Lycoming; Sullivan; Southern Clinton; Southern Lycoming; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon Severity: Moderate. Certainty: Likely. * WHAT...Heat index values of 96 to 103 degrees expected. * WHERE...A portion of central Pennsylvania. * WHEN...From 11 AM to 8 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...The Heat Advisory may need to be extended into Wednesday for a portion of central Pennsylvania as another hot day is looking increasingly likely.