Flash Flood Warning — New Castle County, Delaware
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 August 3 at 9:08AM EDT until August 3 at 1:15PM EDT by NWS Mount Holly NJ
FFWPHI The National Weather Service in Mount Holly has issued a * Flash Flood Warning for... Northeastern New Castle County in northern Delaware... Southwestern Mercer County in central New Jersey... Northwestern Burlington County in southern New Jersey... Northwestern Camden County in southern New Jersey... Northwestern Gloucester County in southern New Jersey... Northeastern Salem County in southern New Jersey... Southeastern Bucks County in southeastern Pennsylvania... Delaware County in southeastern Pennsylvania... Southeastern Montgomery County in southeastern Pennsylvania... Philadelphia County in southeastern Pennsylvania... * Until 115 PM EDT. * At 908 AM EDT, Doppler radar indicated thunderstorms producing heavy rain across I-95 corridor this morning. Between 1.5 and 3.5 inches of rain have fallen through a combination of rain overnight and this morning. The expected rainfall rate is 1 to 2 inches in 1 hour. Additional rainfall amounts up to 2 inches are possible in the w
Effective August 3, 2026 at 9:08 AM ET · Expires August 3, 2026 at 1:15 PM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Mount Holly NJ
Expires
August 3, 2026 at 1:15 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.
Also In Effect For
This same Flash Flood Warning also covers:
Get Flash Flood Warning Alerts for New Castle 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 New Castle County, Delaware?
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 August 3, 2026 at 1:15 PM ET.
How do I get notified about Flash Flood Warning alerts for New Castle County?
Download StormCast free on Google Play and set New Castle County, Delaware 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.
What other areas does this alert cover?
This same Flash Flood Warning is also in effect for Burlington County, Gloucester County, Bucks County, Montgomery County, Philadelphia County, Salem County, Delaware County, Mercer County, Camden County.