Alert archive / New Jersey / Areal Flood Warnings in 2012

Areal Flood Warning 1, NWS Philadelphia/Mount Holly

January 12, 2012Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood warning at Jan 12, 2012, 11:57 AM EST for Somerset 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
Jan 12, 2012, 11:57 AM EST (16:57 UTC)
Expired
Jan 12, 2012, 3:56 PM EST
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

County Somerset County, NJ

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 5.0 hours before the alert went out and 160 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 2012-01-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2012-01-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 565 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
504 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
565 m²/s²
0-3 km storm-relative helicity
778 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.

513 
WGUS41 KPHI 121657
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1157 AM EST THU JAN 12 2012

NJC035-122245-
/O.NEW.KPHI.FA.W.0001.120112T1657Z-120112T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SOMERSET NJ-
1157 AM EST THU JAN 12 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLOOD WARNING FOR SMALL STREAMS IN...
  WESTERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 545 PM EST

* AT 1151 AM EST...THE NORTH BRANCH RARITAN RIVER AT SOUTH BRANCH 
WAS ABOVE FLOOD STAGE. WATERS WERE RISING IN RESPONSE TO THE 1.50 TO 
2.00 INCHES OF RAINFALL THE AREA RECEIVED.

ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS.

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 4039 7474 4050 7480 4050 7477 4054 7475
      4057 7471 4060 7473 4062 7471 4063 7473
      4064 7473 4066 7474 4068 7463 4045 7455

$$

KRUZDLO
1 follow-up statement
475 
WGUS81 KPHI 122056
FLSPHI

FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
356 PM EST THU JAN 12 2012

NJC035-122105-
/O.CAN.KPHI.FA.W.0001.000000T0000Z-120112T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SOMERSET NJ-
356 PM EST THU JAN 12 2012

...THE FLOOD WARNING HAS BEEN CANCELLED FOR SMALL STREAMS IN WESTERN
SOMERSET COUNTY...

THE NORTH BRANCH OF THE RARITAN RIVER AT THE VILLAGE OF SOUTH BRANCH
HAS FALLEN BELOW ITS 7 FOOT FLOOD STAGE.

LAT...LON 4039 7474 4050 7480 4050 7477 4054 7475
      4057 7471 4060 7473 4062 7471 4063 7473
      4064 7473 4066 7474 4068 7463 4045 7455

$$
 
TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 12, 5:52 AM ESTCoastal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Middlesex, Monmouth, Ocean6 hr
Jan 12, 6:45 AM ESTAreal Flood AdvisoryPHIBurlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 3 more350 days
Jan 12, 1:19 PM ESTCoastal Flood WarningPHIBurlington, Camden, Gloucester, Mercer, Salem73 min
Jan 12, 3:56 PM ESTGale WarningPHI30 hr

Nearby

Areal Flood Warnings in New Jersey, 2012Every areal flood warning in 2012

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.