Flash Flood Warning — Mercer County, Pennsylvania
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Current Status
🌊 Active: Flash Flood Warning
Flash Flood Warning issued September 3 at 6:02PM EDT until September 3 at 9:00PM EDT by NWS Pittsburgh PA
FFWPBZ The National Weather Service in Pittsburgh has issued a * Flash Flood Warning for... Northwestern Mercer County in northwestern Pennsylvania... * Until 900 PM EDT. * At 602 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1.5 and 2 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Greenville, Jamestown, Sheakleyville and Maurice K Goddard State Park.
Effective September 3, 2026 at 6:02 PM ET · Expires September 3, 2026 at 9:00 PM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Pittsburgh PA
Expires
September 3, 2026 at 9:00 PM ET
Last Checked
1 minute ago
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Other Active Alerts in Pennsylvania
Flash Flood Warning
Tornado Warning
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Get Flash Flood Warning Alerts for Mercer County
StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
Frequently Asked Questions
What does a Flash Flood Warning mean for Mercer County, Pennsylvania?
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Is this Flash Flood Warning currently active?
Yes — this alert is active as of our last check (1 minute ago). It's set to expire September 3, 2026 at 9:00 PM ET.
How do I get notified about Flash Flood Warning alerts for Mercer County?
Download StormCast free on Google Play and set Mercer County, Pennsylvania as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.