Weather Alerts For Harlansburg, PA

# HEADLINE -------------------- FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING # DETAILS -------------------- WHAT Sub-freezing temperatures as low as 30 possible. WHERE Forest, Jefferson PA, Mercer, Venango, Lawrence, Armstrong, Butler, Clarion, Higher Elevations of Indiana, and Indiana Counties. WHEN From late tonight through Tuesday morning. IMPACTS Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. ISSUED AT Monday, May 11, 2026 at 7:50 AM EDT ISSUED BY National Weather Service Pittsburgh PA HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Take steps now to protect tender plants from the cold. # AREAS AFFECTED -------------------- Armstrong, Butler, Clarion, Forest, Higher Elevations of Indiana, Indiana, Jefferson PA, Lawrence, Mercer, Venango Including the cities of Brookville, Sharon, Franklin, Punxsutawney, Kittanning, Ford City, Armagh, Hermitage, Ellwood City, Indiana, Clarion, New Castle, Oil City, Grove City, Tionesta, and Butler

Pollen Index: 9.8 Pollen Level: high Predominant Pollen: Mulberry, Oak and Birch. The pollen levels for Tuesday will remain relatively stable in the high range. The pollen producing plants are delivering a fairly constant level of pollen into the air.