Alert archive / New Jersey / Flash Flood Warnings in 2022

Flash Flood Warning 15, NWS Philadelphia/Mount Holly

August 22, 2022Morris County, Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 22, 2022, 11:02 AM EDT for Morris County, Sussex County, New Jersey. 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: Aug 22, 2022, 11:02 AM EDT (15:02 UTC)
Expired: Aug 22, 2022, 2:11 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Morris County, NJ, Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 124 km from the middle of the area, began a volume at 15:03 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
Aug 22, 11:50 AM EDT	HEAVY RAIN 2.97	1 Ssw Sparta, NJ	MESONET STATION EW4675 SPARTA.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 3.0 hours before the alert went out and 141 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: 294 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 539 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

636 
WGUS51 KPHI 221502
FFWPHI
NJC027-037-221900-
/O.NEW.KPHI.FF.W.0015.220822T1502Z-220822T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1102 AM EDT Mon Aug 22 2022

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  North Central Morris County in northern New Jersey...
  Southeastern Sussex County in northwestern New Jersey...

* Until 300 PM EDT.

* At 1102 AM EDT, Doppler radar indicated heavy rain across the 
  warned area. Between 1 and 2 inches of rain have fallen. The 
  expected rainfall rate is 2 to 3 inches in 1 hour. Additional 
  rainfall amounts of 2 to 3 inches are possible in the warned area. 
  Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by heavy rain.

  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...
  Hopatcong, Franklin, Hamburg, Ogdensburg, Lake Mohawk, and 
  Highland Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

Be aware of your surroundings and do not drive on flooded roads.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4095 7467 4110 7468 4118 7447 4115 7443
      4109 7450 4108 7449 4107 7449 4106 7450
      4104 7450 4103 7450 4105 7448 4105 7445
      4105 7444

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...2-3 INCHES IN 1 HOUR

$$

MPS

2 follow-up statements

500 
WGUS71 KPHI 221744
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
144 PM EDT Mon Aug 22 2022

NJC027-037-221900-
/O.CON.KPHI.FF.W.0015.000000T0000Z-220822T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Morris NJ-Sussex NJ-
144 PM EDT Mon Aug 22 2022

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 3 PM EDT THIS 
AFTERNOON FOR NORTH CENTRAL MORRIS AND SOUTHEASTERN SUSSEX 
COUNTIES...

At 144 PM EDT, Doppler radar indicated heavy rain across the warned 
area. Between 2 and 4 inches of rain have fallen. Flash flooding is 
ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by heavy rain.

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...
  Hopatcong, Franklin, Hamburg, Ogdensburg, Lake Mohawk, and 
  Highland Lake.

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 4095 7467 4110 7468 4118 7447 4115 7443
      4109 7450 4108 7449 4107 7449 4106 7450
      4104 7450 4103 7450 4105 7448 4105 7445
      4105 7444

FLASH FLOOD...RADAR INDICATED

$$

MPS

956 
WGUS71 KPHI 221811
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
211 PM EDT Mon Aug 22 2022

NJC027-037-221821-
/O.CAN.KPHI.FF.W.0015.000000T0000Z-220822T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Morris NJ-Sussex NJ-
211 PM EDT Mon Aug 22 2022

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

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

LAT...LON 4095 7467 4110 7468 4118 7447 4115 7443
      4109 7450 4108 7449 4107 7449 4106 7450
      4104 7450 4103 7450 4105 7448 4105 7445
      4105 7444

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 12:18 AM EDT	Areal Flood Advisory	PHI	Gloucester, Salem	64 min
Aug 22, 2:01 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	99 min
Aug 22, 3:42 AM EDT	Areal Flood Advisory	PHI	Hunterdon	61 min
Aug 22, 4:22 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	3 hr
Aug 22, 4:37 AM EDT	Flash Flood Warning	PHI	Burlington, Ocean	4 hr
Aug 22, 5:35 AM EDT	Special Marine Warning	PHI		55 min
Aug 22, 5:46 AM EDT	Flash Flood Warning	PHI	Ocean	5 hr
Aug 22, 6:22 AM EDT	Special Marine Warning	PHI		53 min
Aug 22, 9:46 AM EDT	Flash Flood Warning	PHI	Hunterdon, Somerset	4 hr
Aug 22, 11:39 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	3 hr
Aug 22, 1:04 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	3 hr
Aug 22, 3:24 PM EDT	Areal Flood Advisory	PHI	Morris	43 min
Aug 22, 4:04 PM EDT	Areal Flood Advisory	PHI	Burlington	60 min
Aug 22, 4:46 PM EDT	Areal Flood Advisory	PHI	Middlesex	86 min
Aug 22, 5:41 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	53 min
Aug 22, 5:44 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	46 min
Aug 22, 6:26 PM EDT	Special Weather Statement	PHI	Morris	64 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.