Alert archive / New Jersey / Flash Flood Warnings in 2022

Flash Flood Warning 19, NWS Philadelphia/Mount Holly

September 13, 2022Middlesex County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 13, 2022, 3:24 AM EDT for Middlesex County, Somerset County, New Jersey. It was in force for 3 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: Sep 13, 2022, 3:24 AM EDT (07:24 UTC)
Expired: Sep 13, 2022, 6:15 AM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Middlesex County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 07:24 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

Brookhaven, NY (KOKX), launched 00:00Z, 7.4 hours before the alert went out and 130 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: 42 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 895 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

398 
WGUS51 KPHI 130724
FFWPHI
NJC023-035-131015-
/O.NEW.KPHI.FF.W.0019.220913T0724Z-220913T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
324 AM EDT Tue Sep 13 2022

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Northeastern Middlesex County in northern New Jersey...
  East Central Somerset County in northern New Jersey...

* Until 615 AM EDT.

* At 324 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Additional rainfall amounts of 0.5 to 1.5 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...
  New Brunswick, Perth Amboy, Somerset, Edison, Carteret, Middlesex, 
  Bound Brook, Society Hill, Colonia, Woodbridge, South Plainfield, 
  and North Plainfield.

This includes the following highways...
	New Jersey Turnpike between exits 11 and 13.
	Interstate 78 in New Jersey between mile markers 39 and 42.
	Interstate 287 in New Jersey between mile markers 0 and 12.
	Garden State Parkway between mile markers 125 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 4053 7457 4066 7449 4067 7446 4066 7445
      4066 7440 4062 7443 4060 7446 4061 7431
      4059 7429 4060 7422 4060 7421 4056 7422
      4055 7425 4050 7426 4050 7428 4049 7429
      4048 7427 4047 7427

FLASH FLOOD...RADAR INDICATED

$$

AKL

2 follow-up statements

866 
WGUS71 KPHI 130914
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
514 AM EDT Tue Sep 13 2022

NJC023-035-131015-
/O.CON.KPHI.FF.W.0019.000000T0000Z-220913T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex NJ-Somerset NJ-
514 AM EDT Tue Sep 13 2022

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 AM EDT THIS 
MORNING FOR NORTHEASTERN MIDDLESEX AND EAST CENTRAL SOMERSET 
COUNTIES...

At 514 AM EDT, Doppler radar indicated thunderstorms produced heavy 
rain across the warned area. Between 2 and 3 inches of rain have 
fallen. 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...
  New Brunswick, Perth Amboy, Somerset, Edison, Carteret, Middlesex, 
  Bound Brook, Colonia, Society Hill, Woodbridge, South Plainfield, 
  and Highland Park.

This includes the following highways...
	New Jersey Turnpike between exits 11 and 13.
	Interstate 287 in New Jersey between mile markers 0 and 12.
	Garden State Parkway between mile markers 125 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4053 7457 4057 7454 4060 7446 4061 7431
      4059 7429 4060 7422 4060 7421 4056 7422
      4056 7423 4055 7425 4050 7426 4050 7428
      4049 7429 4048 7427 4047 7427

FLASH FLOOD...RADAR INDICATED

$$

AKL

768 
WGUS71 KPHI 131008
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
608 AM EDT Tue Sep 13 2022

NJC023-035-131018-
/O.EXP.KPHI.FF.W.0019.000000T0000Z-220913T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex NJ-Somerset NJ-
608 AM EDT Tue Sep 13 2022

...FLASH FLOOD WARNING WILL EXPIRE AT 615 AM EDT THIS MORNING FOR 
NORTHEASTERN MIDDLESEX AND EAST CENTRAL SOMERSET COUNTIES...

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

LAT...LON 4053 7457 4057 7454 4060 7446 4061 7431
      4059 7429 4060 7422 4060 7421 4056 7422
      4056 7423 4055 7425 4050 7426 4050 7428
      4049 7429 4048 7427 4047 7427

$$

AKL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 12, 8:12 PM EDT	Small Craft Advisory	PHI		8 hr
Sep 12, 10:01 PM EDT	Special Marine Warning	PHI		59 min
Sep 12, 10:15 PM EDT	Special Marine Warning	PHI		60 min
Sep 12, 10:51 PM EDT	Special Marine Warning	PHI		54 min
Sep 12, 10:55 PM EDT	Special Weather Statement	PHI	Cumberland	35 min
Sep 12, 11:17 PM EDT	Areal Flood Advisory	PHI	Somerset	3 hr
Sep 12, 11:27 PM EDT	Areal Flood Advisory	PHI	Middlesex	3 hr
Sep 13, 12:46 AM EDT	Areal Flood Advisory	PHI	Morris, Somerset	4 hr
Sep 13, 4:59 AM EDT	Special Marine Warning	PHI		61 min
Sep 13, 5:50 AM EDT	Special Marine Warning	PHI		55 min
Sep 13, 6:41 AM EDT	Special Marine Warning	PHI		71 min

Nearby

Flash Flood Warnings in New Jersey, 2022 Every flash flood warning in 2022

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.