Alert archive / Delaware / Flash Flood Warnings in 2025
Flash Flood Warning 53, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 10, 2025, 4:15 PM EDT for Kent County, Delaware. It was in force for 117 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 10, 2025, 4:15 PM EDT (20:15 UTC)
- Expired
- Jul 10, 2025, 6:12 PM EDT
- In force
- 117 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Kent County, DE
The radar
The Dover AFB radar (KDOX), 34 km from the middle of the area, began a volume at 20:17 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.3 hours before the alert went out and 133 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 182 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 701 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
142
WGUS51 KPHI 102015
FFWPHI
DEC001-110015-
/O.NEW.KPHI.FF.W.0053.250710T2015Z-250711T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
415 PM EDT Thu Jul 10 2025
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Central Kent County in central Delaware...
* Until 815 PM EDT.
* At 415 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. The expected rainfall rate is 1 to 2 inches in 1
hour. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
* Some locations that may experience flash flooding include...
Dover, Camden, Rising Sun, Dover Base Housing, Rising Sun-Lebanon,
Dover Speedway, Wyoming, Kent Acres, Highland Acres and Rodney
Village.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3908 7552 3909 7557 3916 7559 3918 7559
3918 7546 3910 7543
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
MJL1 follow-up statement
299
WGUS71 KPHI 102212
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
612 PM EDT Thu Jul 10 2025
DEC001-102222-
/O.CAN.KPHI.FF.W.0053.000000T0000Z-250711T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-
612 PM EDT Thu Jul 10 2025
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL KENT COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
&&
LAT...LON 3908 7552 3909 7557 3916 7559 3918 7559
3918 7546 3910 7543
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 8:00 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Jul 9, 8:32 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Jul 9, 8:46 PM EDT | Tornado Warning | PHI | New Castle | 29 min |
| Jul 9, 8:51 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 39 min |
| Jul 9, 9:13 PM EDT | Tornado Warning | PHI | Sussex | 32 min |
| Jul 9, 9:30 PM EDT | River Flood Warning | PHI | New Castle | 7 hr |
| Jul 9, 11:27 PM EDT | River Flood Warning | PHI | New Castle | 8 hr |
| Jul 9, 11:44 PM EDT | Areal Flood Warning | PHI | New Castle | 4 hr |
| Jul 10, 7:33 PM EDT | Flash Flood Warning | PHI | Sussex | 104 min |
Nearby
Flash Flood Warnings in Delaware, 2025Every flash flood warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.