Alert archive / New Jersey / Flash Flood Warnings in 2018

Flash Flood Warning 20, NWS Philadelphia/Mount Holly

July 3, 2018Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 3, 2018, 3:43 PM EDT for Morris County, New Jersey. It was in force for 2 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
Jul 3, 2018, 3:43 PM EDT (19:43 UTC)
Expired
Jul 3, 2018, 5:53 PM EDT
In force
2 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

County Morris County, NJ

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.7 hours before the alert went out and 132 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, Brookhaven, NY at 12:00Z on 2018-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 864 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2018-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.1939Sfc1 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
864 J/kg
Mixed-layer CIN
-149 J/kg
Mixed-layer LCL
920 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

069 
WGUS51 KPHI 031943
FFWPHI
NJC027-032345-
/O.NEW.KPHI.FF.W.0020.180703T1943Z-180703T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
343 PM EDT TUE JUL 3 2018

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Southeastern Morris County in northern New Jersey...

* Until 745 PM EDT.

* At 343 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly in the areas of heaviest rain.

* Some locations that could experience flooding include...
  Morristown, Madison, Florham Park, East Hanover, Chatham, Rockaway,
  Morris Plains, Mendham, Mountain Lakes, Parsippany, Bernardsville
  and Hanover Township.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 4082 7434 4079 7437 4076 7437 4076 7436
      4073 7438 4069 7444 4071 7453 4076 7456
      4075 7462 4090 7451 4085 7433

$$

Meola
1 follow-up statement
132 
WGUS71 KPHI 032153
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
553 PM EDT TUE JUL 3 2018

NJC027-032203-
/O.CAN.KPHI.FF.W.0020.000000T0000Z-180703T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Morris NJ-
553 PM EDT TUE JUL 3 2018

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN MORRIS COUNTY IS
CANCELLED...

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

LAT...LON 4082 7434 4079 7437 4076 7437 4076 7436
      4073 7438 4069 7444 4071 7453 4076 7456
      4075 7462 4090 7451 4085 7433

$$

JJM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 2:33 PM EDTSpecial Weather StatementPHIUnion27 min
Jul 3, 2:57 PM EDTSpecial Weather StatementPHIMorris63 min
Jul 3, 3:19 PM EDTFlash Flood WarningPHIMorris3 hr
Jul 3, 3:28 PM EDTSpecial Weather StatementPHISalem62 min
Jul 3, 3:30 PM EDTSpecial Weather StatementPHIBurlington60 min
Jul 3, 4:49 PM EDTSpecial Weather StatementPHISomerset56 min
Jul 3, 4:52 PM EDTSpecial Weather StatementPHIMercer53 min
Jul 3, 4:57 PM EDTFlash Flood WarningPHIHunterdon, Somerset114 min
Jul 3, 5:24 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester4 hr
Jul 3, 5:29 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Middlesex, Monmouth, Somerset4 hr
Jul 3, 5:45 PM EDTFlash Flood WarningPHICamden, Gloucester4 hr
Jul 3, 5:47 PM EDTFlash Flood WarningPHIHunterdon, Mercer, Middlesex, Somerset2 hr
Jul 3, 5:57 PM EDTSpecial Weather StatementPHIGloucester33 min
Jul 3, 6:03 PM EDTSpecial Weather StatementPHISussex57 min
Jul 3, 6:11 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester49 min
Jul 3, 6:25 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden50 min
Jul 3, 6:37 PM EDTFlash Flood WarningPHIBurlington, Camden3 hr
Jul 3, 6:46 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester44 min
Jul 3, 6:58 PM EDTFlash Flood WarningPHIBurlington, Camden, Gloucester49 min
Jul 3, 7:03 PM EDTSpecial Weather StatementPHIWarren57 min

Nearby

Flash Flood Warnings in New Jersey, 2018Every flash flood warning in 2018

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.