Alert archive / Delaware / Flash Flood Warnings in 2026

Flash Flood Warning 30, NWS Philadelphia/Mount Holly

July 6, 2026Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 6, 2026, 4:17 PM EDT for Kent County, Sussex County, Delaware. 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: Jul 6, 2026, 4:17 PM EDT (20:17 UTC)
Expired: Jul 6, 2026, 7:40 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Kent County, DE, Sussex County, DE

The radar

The Dover AFB radar (KDOX), 25 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.

What was reported inside it

Time	Report	Where	Remark
Jul 6, 4:34 PM EDT	FLASH FLOOD	Milford, DE	Picture of vehicle stuck in a flooded roadway on Front Street in Milford, 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 12:00Z, 8.3 hours before the alert went out and 171 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: 174 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

366 
WGUS51 KPHI 062017
FFWPHI
DEC001-005-070015-
/O.NEW.KPHI.FF.W.0030.260706T2017Z-260707T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
417 PM EDT Mon Jul 6 2026

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Southeastern Kent County in central Delaware...
  North Central Sussex County in southern Delaware...

* Until 815 PM EDT.

* At 417 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 3 inches of 
  rain have fallen. The expected rainfall rate is 1.5 to 3 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...
  Dover, Milford, Bowers, Big Stone Beach, Dover Base Housing, 
  Rising Sun-Lebanon, Rising Sun, Frederica, Magnolia, Little Creek, 
  Riverview and Woodside East.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3897 7551 3903 7552 3911 7552 3916 7552
      3918 7549 3920 7545 3920 7542 3920 7538
      3919 7536 3911 7534 3907 7533 3906 7533
      3894 7527 3887 7537 3887 7542 3887 7547
      3890 7549

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1.5-3 INCHES IN 1 HOUR

$$

Hoeflich

2 follow-up statements

840 
WGUS71 KPHI 062037
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
437 PM EDT Mon Jul 6 2026

DEC001-005-070015-
/O.CON.KPHI.FF.W.0030.000000T0000Z-260707T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-Sussex DE-
437 PM EDT Mon Jul 6 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT THIS 
EVENING FOR SOUTHEASTERN KENT AND NORTH CENTRAL SUSSEX COUNTIES...

At 437 PM EDT, trained weather spotters reported thunderstorms 
producing heavy rain with a vehicle stranded on a flooded roadway in 
Milford. Between 1.5 and 3 inches of rain have fallen. The expected 
rainfall rate is 1.5 to 3 inches in 1 hour. Additional rainfall 
amounts of 1 to 2 inches are possible in the warned area. Flash 
flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Trained spotters reported.

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, Milford, Bowers, Big Stone Beach, Dover Base Housing, 
  Rising Sun-Lebanon, Rising Sun, Frederica, Magnolia, Little Creek, 
  Riverview and Woodside East.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3897 7551 3903 7552 3911 7552 3916 7552
      3918 7549 3920 7545 3920 7542 3920 7538
      3919 7536 3911 7534 3907 7533 3906 7533
      3894 7527 3887 7537 3887 7542 3887 7547
      3890 7549

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...1.5-3 INCHES IN 1 HOUR

$$

Hoeflich

942 
WGUS71 KPHI 062340 RRA
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
740 PM EDT Mon Jul 6 2026

DEC001-005-062350-
/O.CAN.KPHI.FF.W.0030.000000T0000Z-260707T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-Sussex DE-
740 PM EDT Mon Jul 6 2026

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN KENT AND NORTH 
CENTRAL SUSSEX COUNTIES...

The heavy rain has ended and flood waters are receding. Flooding is 
no longer expected to pose a threat. Please continue to heed 
remaining road closures.

&&

LAT...LON 3897 7551 3903 7552 3911 7552 3916 7552
      3918 7549 3920 7545 3920 7542 3920 7538
      3919 7536 3911 7534 3907 7533 3906 7533
      3894 7527 3887 7537 3887 7542 3887 7547
      3890 7549

$$

AKL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 10:05 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	40 min
Jul 5, 10:37 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	38 min
Jul 5, 11:00 PM EDT	Flash Flood Warning Considerable damage threat	PHI	New Castle	4 hr
Jul 5, 11:30 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	45 min
Jul 6, 3:35 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	55 min

Nearby

Flash Flood Warnings in Delaware, 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.