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Heat Advisory

EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 PM EDT WEDNESDAY

WHAT:
For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 110. For the Heat Advisory, heat index values up to 104 expected.

WHERE:
Columbia, Juniata, Mifflin, Montour, Northumberland, Schuylkill, Snyder, Southern Lycoming, and Union Counties.

WHEN:
For the Extreme Heat Warning, until 8 PM EDT this evening. For the Heat Advisory, from 8 PM this evening to 8 PM EDT Wednesday.

IMPACTS:
Heat related illnesses increase significantly during extreme heat and high humidity events. Heat impacts are likely in most health systems, heat-sensitive industries and infrastructure.

Updated: 
June 23, 2025 at 12:59 EDT
Event Onset: 
June 23, 2025 at 20:00 EDT
Event End: 
June 25, 2025 at 20:00 EDT
Severity: 
Moderate
Urgency: 
Expected
Certainty: 
Likely
Issued By: 
NWS State College PA
Area(s): 
Columbia
Juniata
Mifflin
Montour
Northumberland
Schuylkill
Snyder
Southern Lycoming
Union