Alert archive / Delaware / Flash Flood Warnings in 2026

Flash Flood Warning 5, NWS Philadelphia/Mount Holly

June 14, 2026New Castle County, Delaware; Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 14, 2026, 10:38 PM EDT for New Castle County, Delaware; Delaware County, Pennsylvania. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 14, 2026, 10:38 PM EDT (02:38 UTC)
Expired: Jun 15, 2026, 1:23 AM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties New Castle County, DE, Delaware County, PA

The radar

The Dover AFB radar (KDOX), 86 km from the middle of the area, began a volume at 02:38 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.

What was reported inside it

Time	Report	Where	Remark
Jun 14, 11:15 PM EDT	FLASH FLOOD	Bear, DE	Water rescue along Foxhunt Drive in Bear, DE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.6 hours before the alert went out and 172 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 916 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1620 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 6.4

Open this sounding in Storm Lab

The text

As transmitted.

699 
WGUS51 KPHI 150238
FFWPHI
DEC003-PAC045-150645-
/O.NEW.KPHI.FF.W.0005.260615T0238Z-260615T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1038 PM EDT Sun Jun 14 2026

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  New Castle County in northern Delaware...
  South Central Delaware County in southeastern Pennsylvania...

* Until 245 AM EDT.

* At 1038 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.5 and 1 inch of rain 
  has fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. 
  Additional rainfall amounts of 1 to 2 inches are possible in the 
  warned area. 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...
  Wilmington, Newark, Middletown, Chester, Elsmere, New Castle, 
  Delaware City, Newport, Saint Georges, Bear, Port Penn and Mount 
  Pleasant.

This includes the following highways...
	Interstate 95 in Pennsylvania between mile markers 3 and 5.
	Interstate 95 in Delaware between mile markers 1 and 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

&&

LAT...LON 3935 7576 3965 7578 3986 7537 3984 7536
      3976 7548 3961 7562 3956 7556 3948 7558
      3943 7556

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

RCM

2 follow-up statements

534 
WGUS71 KPHI 150254 RRA
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
1054 PM EDT Sun Jun 14 2026

DEC003-PAC045-150645-
/O.CON.KPHI.FF.W.0005.000000T0000Z-260615T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Delaware PA-
1054 PM EDT Sun Jun 14 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 AM EDT MONDAY FOR 
NEW CASTLE AND SOUTH CENTRAL DELAWARE COUNTIES...

At 1054 PM EDT, local law enforcement reported 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. Additional rainfall amounts of 2 to 3 inches are possible in 
the warned area. Flash flooding is already occurring.

HAZARD...Life threatening flash flooding caused by thunderstorms.

SOURCE...Law enforcement reported.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets, and underpasses.

Some locations that may experience flash flooding include...
  Wilmington, Newark, Middletown, Chester, Elsmere, New Castle, 
  Delaware City, Newport, Saint Georges, Bear, Port Penn and Mount 
  Pleasant.

This includes the following highways...
	Interstate 95 in Pennsylvania between mile markers 0 and 1...and
	between mile markers 3 and 5.
	Interstate 95 in Delaware between mile markers 1 and 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

&&

LAT...LON 3935 7576 3965 7578 3986 7537 3984 7536
      3976 7548 3961 7562 3956 7556 3948 7558
      3943 7556

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

RCM

548 
WGUS71 KPHI 150523
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
123 AM EDT Mon Jun 15 2026

DEC003-PAC045-150533-
/O.CAN.KPHI.FF.W.0005.000000T0000Z-260615T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Delaware PA-
123 AM EDT Mon Jun 15 2026

...FLASH FLOOD WARNING IS CANCELLED FOR NEW CASTLE AND SOUTH CENTRAL 
DELAWARE COUNTIES...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

&&

LAT...LON 3935 7576 3965 7578 3986 7537 3984 7536
      3976 7548 3961 7562 3956 7556 3948 7558
      3943 7556

$$

Hoeflich

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 14, 9:04 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	37 min
Jun 14, 9:54 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	51 min
Jun 14, 10:15 PM EDT	Flash Flood Warning	PHI	New Castle	3 hr
Jun 15, 3:10 AM EDT	Coastal Flood Advisory	PHI	Kent, Sussex	23 hr
Jun 14, 8:16 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	44 min
Jun 14, 9:06 PM EDT	Severe Thunderstorm Warning	PHI	Chester	54 min
Jun 14, 9:50 PM EDT	Flash Flood Warning	PHI	Chester	3 hr
Jun 14, 10:21 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	39 min
Jun 14, 10:26 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	3 hr
Jun 14, 10:44 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	46 min
Jun 14, 10:51 PM EDT	Flash Flood Warning	PHI	Bucks, Philadelphia	3 hr
Jun 14, 10:58 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	47 min
Jun 14, 11:16 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	29 min
Jun 15, 1:37 AM EDT	Areal Flood Warning	PHI	Delaware	4 hr
Jun 15, 2:12 AM EDT	River Flood Warning	PHI	Delaware	2 hr

Nearby

Flash Flood Warnings in Delaware, 2026 Flash Flood Warnings in Pennsylvania, 2026 Every flash flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.