Alert archive / New Jersey / Flash Flood Warnings in 2011

Flash Flood Warning 46, NWS Philadelphia/Mount Holly

September 5, 2011Morris County, Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 5, 2011, 9:43 PM EDT for Morris County, Sussex County, Warren County, New Jersey. 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
Sep 5, 2011, 9:43 PM EDT (01:43 UTC)
Expired
Sep 6, 2011, 1:30 AM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 117 km from the middle of the area, began a volume at 01:44 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, 1.7 hours before the alert went out and 152 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 00:00Z on 2011-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Brookhaven, NY at 00:00Z on 2011-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1126 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
157 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.

176 
WGUS51 KPHI 060143
FFWPHI
NJC027-037-041-060530-
/O.NEW.KPHI.FF.W.0046.110906T0143Z-110906T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
943 PM EDT MON SEP 5 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SUSSEX COUNTY...
  NORTHERN WARREN COUNTY...
  MORRIS COUNTY...

* UNTIL 130 AM EDT...

* AT 936 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
HEAVY RAIN OVER PORTIONS OF NORTHERN NEW JERSEY. THE RAIN WILL MOVE
NORTHEAST AT 25 TO 30 MPH THIS EVENING. THIS HEAVY RAIN WILL FALL
OVER AREAS THAT HAVE ALREADY RECEIVED OVER AN INCH OF RAIN THIS
EVENING. THIS WILL CAUSE ROADWAY FLOODING, FLOODING IN AREAS OF
POOR DRAINAGE, AND MAY CAUSE SMALL STREAMS AND CREEKS TO REACH
OR OVERFLOW THEIR BANKS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NEWTON.

ADDITIONAL RAINFALL AMOUNTS OF UP TO AN INCH ARE POSSIBLE IN THE 
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING TO THE NATIONAL WEATHER SERVICE BY CALLING 
TOLL FREE...1-877-633-6772.

&&

LAT...LON 4120 7438 4118 7437 4109 7449 4104 7449
      4105 7444 4102 7442 4101 7432 4098 7428
      4075 7453 4076 7485 4078 7488 4076 7492
      4076 7513 4085 7509 4086 7505 4089 7507
      4109 7497 4135 7471

$$

RPW

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 5, 11:04 PM EDTAreal Flood AdvisoryPHIHunterdon, Warren6 hr
Sep 6, 12:22 AM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Salem3 hr
Sep 6, 1:32 AM EDTAreal Flood AdvisoryPHIMorris, Sussex, Warren5 hr
Sep 6, 6:57 AM EDTAreal Flood WarningPHIMorris22 hr
Sep 6, 4:35 PM EDTRiver Flood WarningPHIEssex, Passaic7 days
Sep 6, 4:35 PM EDTRiver Flood WarningPHIMorris, Passaic4 days
Sep 6, 4:35 PM EDTRiver Flood WarningPHIMorris5 days
Sep 6, 4:35 PM EDTRiver Flood WarningPHIPassaic4 days
Sep 6, 5:43 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Hunterdon, Mercer, Salem3 hr
Sep 6, 5:45 PM EDTAreal Flood AdvisoryPHIHunterdon, Middlesex, Morris, Somerset3 hr
Sep 6, 6:10 PM EDTAreal Flood WarningPHISussex, Warren71 hr
Sep 6, 6:48 PM EDTAreal Flood WarningPHIHunterdon, Mercer, Morris, Somerset31 hr

Nearby

Flash Flood Warnings in New Jersey, 2011Every flash flood warning in 2011

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.