Alert archive / New Jersey / Flash Flood Warnings in 2023

Flash Flood Warning 23, NWS Philadelphia/Mount Holly

June 27, 2023Salem County, New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 27, 2023, 5:17 PM EDT for Salem County, New Jersey; New Castle County, Delaware. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 27, 2023, 5:17 PM EDT (21:17 UTC)
Expired
Jun 27, 2023, 9:15 PM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties New Castle County, DE, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 68 km from the middle of the area, began a volume at 21:21 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, 9.3 hours before the alert went out and 168 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 12:00Z on 2023-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2023-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
8 J/kg
Mixed-layer CIN
-130 J/kg
Mixed-layer LCL
1455 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

675 
WGUS51 KPHI 272117
FFWPHI
DEC003-NJC033-280115-
/O.NEW.KPHI.FF.W.0023.230627T2117Z-230628T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
517 PM EDT Tue Jun 27 2023

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Southwestern New Castle County in northern Delaware...
  Southwestern Salem County in southern New Jersey...

* Until 915 PM EDT.

* At 517 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. 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...
  Middletown, Hope Creek, Port Penn, Hancocks Bridge, Odessa, and 
  Chambersville.

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 3934 7561 3947 7573 3956 7543 3946 7539
      3946 7540 3945 7541 3944 7541 3943 7542
      3943 7541 3942 7541

FLASH FLOOD...RADAR INDICATED

$$

Kruzdlo
1 follow-up statement
585 
WGUS71 KPHI 280110
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
910 PM EDT Tue Jun 27 2023

DEC003-NJC033-280120-
/O.EXP.KPHI.FF.W.0023.000000T0000Z-230628T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Salem NJ-
910 PM EDT Tue Jun 27 2023

...FLASH FLOOD WARNING WILL EXPIRE AT 915 PM EDT THIS EVENING FOR 
SOUTHWESTERN NEW CASTLE AND SOUTHWESTERN SALEM COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat.

LAT...LON 3934 7561 3947 7573 3956 7543 3946 7539
      3946 7540 3945 7541 3944 7541 3943 7542
      3943 7541 3942 7541

$$

MPS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 26, 8:42 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Somerset48 min
Jun 26, 8:56 PM EDTAreal Flood AdvisoryPHISussex38 min
Jun 26, 8:56 PM EDTSpecial Weather StatementPHIWarren34 min
Jun 26, 9:21 PM EDTSpecial Weather StatementPHIMercer24 min
Jun 26, 9:30 PM EDTFlash Flood WarningPHIWarren3 hr
Jun 26, 9:31 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Somerset44 min
Jun 26, 9:34 PM EDTFlash Flood WarningPHISussex2 hr
Jun 26, 9:46 PM EDTSpecial Marine WarningPHI59 min
Jun 26, 9:51 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem54 min
Jun 26, 10:07 PM EDTSpecial Weather StatementPHIMiddlesex, Morris23 min
Jun 26, 10:26 PM EDTSevere Thunderstorm WarningPHIMorris16 min
Jun 26, 10:33 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Salem42 min
Jun 26, 10:41 PM EDTAreal Flood AdvisoryPHISussex, Warren84 min
Jun 26, 10:54 PM EDTAreal Flood AdvisoryPHICamden, Gloucester, Salem3 hr
Jun 26, 11:07 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Hunterdon, Mercer, Middlesex, Monmouth and 1 more53 min
Jun 26, 11:27 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Somerset3 hr
Jun 26, 11:35 PM EDTFlash Flood WarningPHIMercer6 hr
Jun 26, 11:42 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Somerset33 min
Jun 27, 12:00 AM EDTAreal Flood WarningPHIHunterdon, Morris, Somerset, Sussex, Warren7 hr
Jun 27, 12:12 AM EDTSpecial Weather StatementPHIMonmouth33 min
Jun 27, 12:16 AM EDTSpecial Marine WarningPHI44 min
Jun 27, 1:26 AM EDTSpecial Marine WarningPHI49 min
Jun 27, 2:00 AM EDTSpecial Marine WarningPHI45 min
Jun 27, 3:02 AM EDTFlood WatchPHIHunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more46 min
Jun 27, 3:48 AM EDTFlood WatchPHIBurlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more17 hr
Jun 27, 4:04 AM EDTRiver Flood WarningPHIMorris22 hr
Jun 27, 11:16 AM EDTAreal Flood AdvisoryPHIMorris, Sussex3 hr
Jun 27, 11:42 AM EDTAreal Flood AdvisoryPHIMonmouth2 hr
Jun 27, 3:05 PM EDTSevere Thunderstorm WarningPHICumberland, Salem40 min
Jun 27, 3:06 PM EDTSpecial Marine WarningPHI54 min
Jun 27, 3:32 PM EDTAreal Flood AdvisoryPHICumberland, Salem3 hr
Jun 27, 3:38 PM EDTSevere Thunderstorm WarningPHICumberland, Salem52 min
Jun 27, 3:41 PM EDTSevere Thunderstorm WarningPHISalem22 min
Jun 27, 3:52 PM EDTSpecial Marine WarningPHI53 min
Jun 27, 4:21 PM EDTSevere Thunderstorm WarningPHICumberland, Salem39 min
Jun 27, 4:24 PM EDTAreal Flood AdvisoryPHIWarren3 hr
Jun 27, 4:33 PM EDTSevere Thunderstorm WarningPHIWarren42 min
Jun 27, 4:36 PM EDTSevere Thunderstorm WarningPHICumberland, Salem26 min
Jun 27, 4:39 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer51 min
Jun 27, 5:01 PM EDTSevere Thunderstorm WarningPHIMorris, Warren44 min
Jun 27, 5:05 PM EDTSpecial Marine WarningPHI25 min
Jun 27, 5:22 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden38 min
Jun 27, 5:23 PM EDTSevere Thunderstorm WarningPHICumberland, Gloucester, Salem32 min
Jun 27, 5:40 PM EDTSpecial Weather StatementPHIHunterdon, Somerset35 min
Jun 27, 5:45 PM EDTSpecial Weather StatementPHIWarren45 min
Jun 27, 5:49 PM EDTSpecial Weather StatementPHICamden26 min
Jun 27, 5:52 PM EDTAreal Flood AdvisoryPHISussex, Warren3 hr
Jun 27, 5:52 PM EDTSpecial Weather StatementPHIBurlington38 min
Jun 27, 5:57 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Cumberland, Gloucester, Mercer, Salem3 hr
Jun 27, 6:08 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden25 min
Jun 27, 6:12 PM EDTSpecial Weather StatementPHIMiddlesex, Morris, Somerset33 min
Jun 27, 6:15 PM EDTSpecial Weather StatementPHIWarren45 min
Jun 27, 6:35 PM EDTSpecial Weather StatementPHIBurlington25 min
Jun 27, 6:40 PM EDTSpecial Marine WarningPHI36 min
Jun 27, 6:46 PM EDTSevere Thunderstorm WarningPHIMorris44 min
Jun 27, 6:49 PM EDTAreal Flood AdvisoryPHISussex3 hr
Jun 27, 6:52 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more3 hr
Jun 27, 7:03 PM EDTSpecial Weather StatementPHISussex27 min
Jun 27, 7:30 PM EDTSpecial Weather StatementPHISussex30 min
Jun 27, 7:56 PM EDTSpecial Weather StatementPHIAtlantic34 min
Jun 26, 9:19 PM EDTSpecial Weather StatementPHINew Castle26 min
Jun 26, 9:25 PM EDTSevere Thunderstorm WarningPHINew Castle50 min
Jun 26, 10:01 PM EDTFlash Flood WarningPHINew Castle4 hr
Jun 26, 10:46 PM EDTRiver Flood WarningPHINew Castle5 hr
Jun 26, 11:09 PM EDTRiver Flood WarningPHINew Castle2 hr
Jun 27, 2:09 AM EDTSpecial Weather StatementPHINew Castle21 min
Jun 27, 2:29 AM EDTSpecial Weather StatementPHINew Castle31 min
Jun 27, 2:37 AM EDTFlash Flood WarningPHINew Castle3 hr
Jun 27, 5:08 PM EDTSevere Thunderstorm WarningPHIKent37 min
Jun 27, 6:18 PM EDTSpecial Weather StatementPHIKent27 min

Nearby

Flash Flood Warnings in New Jersey, 2023Flash Flood Warnings in Delaware, 2023Every flash flood warning in 2023

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.