Alert archive / New Jersey / Flash Flood Warnings in 2014

Flash Flood Warning 20, NWS Philadelphia/Mount Holly

July 2, 2014Hunterdon County, Middlesex County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 2, 2014, 7:15 PM EDT for Hunterdon County, Middlesex County, Somerset County, New Jersey. It was in force for 4 hr. 2 reports 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 2, 2014, 7:15 PM EDT (23:15 UTC)
Expired
Jul 2, 2014, 11:15 PM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Hunterdon County, NJ, Middlesex County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 72 km from the middle of the area, began a volume at 23:16 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

TimeReportWhereRemark
Jul 2, 8:58 PM EDTFLASH FLOODWoodbridge, NJMULTIPLE REPORTS OF HIGH WATER RESCUES AT ROUTE 9 IN WOODBRIDGE.
Jul 2, 9:00 PM EDTFLASH FLOODPerth Amboy, NJSIGNIFICANT FLOODING ALONG NEW BRUNSWICK AVE IN PERTH AMBOY.

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, 11.3 hours before the alert went out and 142 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 2014-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1089 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 2014-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 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
1089 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
836 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

861 
WGUS51 KPHI 022315
FFWPHI
NJC019-023-035-030315-
/O.NEW.KPHI.FF.W.0020.140702T2315Z-140703T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
715 PM EDT WED JUL 2 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
  THIS INCLUDES THE CITIES OF...NEW BRUNSWICK...PERTH AMBOY...
  SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF SOMERVILLE...
  EAST CENTRAL HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 1115 PM EDT

* AT 713 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  TWO TO TWO AND A HALF INCHES HAS FALLEN ACROSS THE THE WARNED   
  AREA WITH ANOTHER INCH OR TWO POSSIBLE WHICH COULD CAUSE SOME   
  FLASH FLOODING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FLAGTOWN...
  SOCIETY HILL...MIDDLESEX...MANVILLE...EDISON...COLONIA...BOUND
  BROOK...MARTINSVILLE AND BRIDGEWATER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 4042 7475 4058 7488 4067 7453 4065 7451
      4067 7446 4066 7445 4067 7440 4062 7442
      4060 7444 4061 7430 4050 7425

$$

ROBERTSON
1 follow-up statement
464 
WGUS71 KPHI 030149
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
949 PM EDT WED JUL 2 2014

NJC019-023-035-030158-
/O.CAN.KPHI.FF.W.0020.000000T0000Z-140703T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUNTERDON NJ-SOMERSET NJ-MIDDLESEX NJ-
949 PM EDT WED JUL 2 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHERN
MIDDLESEX...CENTRAL SOMERSET AND EAST CENTRAL HUNTERDON COUNTIES...

THE HEAVY RAIN THAT PROMPTED THE WARNING HAS ENDED. THEREFORE THE 
FLASH FLOOD WARNING HAS BEEN CANCELLED. ADDITIONAL SHOWERS AND 
THUNDERSTORMS REMAIN POSSIBLE THROUGH THIS EVENING.

LAT...LON 4042 7475 4058 7488 4067 7453 4065 7451
      4067 7446 4066 7445 4067 7440 4062 7442
      4060 7444 4061 7430 4050 7425

$$

ROBERTSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 3:59 AM EDTSmall Craft AdvisoryPHI18 hr
Jul 2, 2:48 PM EDTSpecial Weather StatementPHISussex42 min
Jul 2, 3:30 PM EDTSevere Thunderstorm WarningPHISussex60 min
Jul 2, 3:36 PM EDTFlash Flood WatchPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more46 hr
Jul 2, 3:58 PM EDTAreal Flood AdvisoryPHISussex, Warren4 hr
Jul 2, 4:03 PM EDTSevere Thunderstorm WarningPHISussex, Warren57 min
Jul 2, 4:34 PM EDTFlash Flood WarningPHISussex4 hr
Jul 2, 5:01 PM EDTAreal Flood AdvisoryPHIMorris, Sussex, Warren3 hr
Jul 2, 5:08 PM EDTSpecial Weather StatementPHIHunterdon52 min
Jul 2, 5:23 PM EDTSevere Thunderstorm WarningPHIHunterdon67 min
Jul 2, 5:42 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Somerset3 hr
Jul 2, 5:56 PM EDTSpecial Weather StatementPHIWarren49 min
Jul 2, 6:06 PM EDTSpecial Weather StatementPHISomerset24 min
Jul 2, 6:13 PM EDTFlash Flood WarningPHIHunterdon4 hr
Jul 2, 6:31 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset42 min
Jul 2, 7:09 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Middlesex, Somerset4 hr
Jul 2, 7:16 PM EDTSpecial Weather StatementPHIMiddlesex, Somerset59 min
Jul 2, 7:35 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Mercer55 min
Jul 2, 7:48 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem27 min
Jul 2, 7:52 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Salem4 hr
Jul 2, 7:58 PM EDTSpecial Marine WarningPHI62 min

Nearby

Flash Flood Warnings in New Jersey, 2014Every flash flood warning in 2014

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.