WHAT:
Flash flooding caused by excessive rainfall is possible.
WHERE:
A portion of central Pennsylvania, including the following areas, Adams, Columbia, Cumberland, Dauphin, Juniata, Lancaster, Lebanon, Montour, Northern Lycoming, Northumberland, Perry, Schuylkill, Snyder, Southern Lycoming, Sullivan, Tioga, Union and York.
WHEN:
Until midnight EDT tonight.
IMPACTS:
Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas.
ADDITIONAL DETAILS:
- Slow moving thunderstorms may produce locally heavy rainfall this afternoon through the late evening. Rainfall amounts of 2 to 4 inches over a short duration are possible in the watch area. - http://www.weather.gov/safety/flood
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.