Alert archive / New Jersey / Areal Flood Warnings in 2010

Areal Flood Warning 21, NWS Philadelphia/Mount Holly

March 30, 20107 counties in New Jersey; Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood warning at Mar 30, 2010, 1:35 PM EDT for 7 counties in New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 8 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
Mar 30, 2010, 1:35 PM EDT (17:35 UTC)
Expired
Mar 30, 2010, 9:30 PM EDT
In force
8 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 108 km from the middle of the area, began a volume at 17:35 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 12:00Z, 5.6 hours before the alert went out and 169 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 2010-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2010-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 323 square meters per square second.1939587897Sfc1 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
427 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
323 m²/s²
0-3 km storm-relative helicity
431 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.

085 
WGUS41 KPHI 301735
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
135 PM EDT TUE MAR 30 2010

NJC019-021-023-027-035-037-041-PAC089-095-310130-
/O.NEW.KPHI.FA.W.0021.100330T1735Z-100331T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX NJ-WARREN NJ-MORRIS NJ-HUNTERDON NJ-SOMERSET NJ-MERCER NJ-
MIDDLESEX NJ-NORTHAMPTON PA-MONROE PA-
135 PM EDT TUE MAR 30 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS IN...
  MERCER COUNTY IN CENTRAL NEW JERSEY...
  THIS INCLUDES THE CITY OF TRENTON...
  NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF EASTON...
  MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF MOUNT POCONO...
  MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
  THIS INCLUDES THE CITIES OF...PERTH AMBOY...NEW BRUNSWICK...
  MORRIS COUNTY IN NORTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF MORRISTOWN...
  SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF SOMERVILLE...
  HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
  SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
  THIS INCLUDES THE CITY OF NEWTON...
  WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 930 PM EDT

* AT 130 PM EDT...STREAMS WERE RISING DUE TO THE HEAVY RAIN THAT HAS 
FALLEN ACROSS THE REGION SINCE SUNDAY NIGHT. ADDITIONAL RISES ARE 
EXPECTED. PONDING OF WATER ON ROADWAYS AND IN AREAS OF POOR DRAINAGE 
CAN ALSO BE EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY 
DEEPER THAN THEY APPEAR. WHEN ENCOUNTERING FLOODED ROADS MAKE THE 
SMART CHOICE...TURN AROUND...DONT DROWN.

A FLOOD WARNING MEANS FLOODING IS OCCURRING OR IS IMMINENT.

&&

LAT...LON 4119 7437 4104 7449 4100 7430 4089 7427
      4059 7444 4059 7420 4044 7423 4013 7460
      4042 7506 4057 7511 4062 7520 4054 7535
      4074 7561 4082 7548 4113 7566 4122 7554
      4126 7514 4116 7516 4109 7501 4135 7470

$$

KRUZDLO

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 30, 2:32 AM EDTAreal Flood WarningPHISalem12 hr
Mar 30, 4:15 AM EDTRiver Flood WarningPHIEssex, Morris, Passaic6 days
Mar 30, 4:15 AM EDTRiver Flood WarningPHIEssex, Passaic5 days
Mar 30, 10:04 AM EDTRiver Flood WarningPHIMorris, Somerset69 hr
Mar 30, 10:09 AM EDTRiver Flood WarningPHISomerset48 hr
Mar 30, 10:16 AM EDTRiver Flood WarningPHIMorris, Passaic39 hr
Mar 30, 1:51 PM EDTAreal Flood WarningPHIBurlington, Camden, Gloucester, Salem8 hr
Mar 30, 2:13 PM EDTAreal Flood WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more24 hr
Mar 30, 3:03 PM EDTSmall Craft AdvisoryPHI21 hr
Mar 30, 3:18 PM EDTRiver Flood WarningPHIMercer8 hr
Mar 30, 3:28 PM EDTRiver Flood WarningPHIMorris, Passaic33 hr
Mar 30, 3:28 PM EDTRiver Flood WarningPHIBergen, Morris, Passaic13 hr
Mar 30, 3:33 PM EDTRiver Flood WarningPHIMiddlesex, Somerset19 hr
Mar 30, 7:16 PM EDTRiver Flood WarningPHIMorris24 hr
Mar 30, 7:32 PM EDTRiver Flood WarningPHIBucks9 hr

Nearby

Areal Flood Warnings in New Jersey, 2010Areal Flood Warnings in Pennsylvania, 2010Every areal flood warning in 2010

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.