SUSQUEHANNA VALLEY, Pa. —
The National Weather Service issued a freeze warning and a frost advisory for parts of south-central Pennsylvania as temperatures dropped across the region.
Monday is an Impact Morning, meaning the weather will likely disrupt your normal daily schedule or routine.
Freeze warning
A freeze warning is in effect for York County until 9 a.m. Monday.
The NWS warned temperatures could hit as low as 30 degrees.
Impacts:
Frost and freezing conditions that could kill crops and other sensitive vegetation Possible damage to unprotected outdoor plumbing Hazardous conditions for plants still exposed outdoors 
Frost advisory
A frost advisory is in effect for Lancaster and Lebanon counties until 9 a.m. Monday.
According to the NWS, temperatures could drop to around 35 degrees, potentially causing frost to form.
Impacts:
The frost may harm or kill tender outdoor plants if they are left uncovered. Residents are advised to move sensitive plants indoors when possible or protect them with suitable coverings.
The growing season has already ended across other parts of the Susquehanna Valley.
Monday’s forecast
Clear, cold conditions are expected early Monday, with morning temperatures in the low-to-mid 30s.
High pressure will bring abundant sunshine during the afternoon, when temperatures are expected to reach the mid-60s.
Monday night won’t be as cold, with lows in the lower 40s under clear skies.
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