Active AlertsAdams

What: Flash flooding caused by excessive rainfall continues to be possible.
Where: A portion of central Pennsylvania, including the following counties, Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and York.
When: Until 2 AM EDT Wednesday.
Impacts: Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.
Additional Details: - Multiple rounds of slow-moving and occasionally training heavy showers and thunderstorms will produce rainfall rates of up to 2 inches per hour leading to rapid runoff into low lying areas and small streams and creeks. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.