Alert archive / New Jersey / Flash Flood Warnings in 2008

Flash Flood Warning 37, NWS Philadelphia/Mount Holly

September 9, 20085 counties in New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 9, 2008, 10:04 AM EDT for 5 counties in New Jersey. It was in force for 3 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: Sep 9, 2008, 10:04 AM EDT (14:04 UTC)
Expired: Sep 9, 2008, 1:18 PM EDT
In force: 3 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

The radar

The Philadelphia radar (KDIX), 64 km from the middle of the area, began a volume at 14:04 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

Time	Report	Where	Remark
Sep 9, 11:00 AM EDT	FLASH FLOOD	4 Ene Flagtown, NJ	HEAVY RAIN CAUSED ROAD CLOSURES ACROSS THE CENTRAL PART OF SOMERSET COUNTY FROM BRANCHBURG EAST THROUGH BOUND BROOK.
Sep 9, 11:06 AM EDT	FLASH FLOOD	5 E South Plainfield, NJ	GARDEN STATE PARKWAY INUNDATED WITH WATER.

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, 2.1 hours before the alert went out and 141 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 34 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 1158 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 091404
FFWPHI
NJC019-021-023-027-035-091800-
/O.NEW.KPHI.FF.W.0037.080909T1404Z-080909T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1004 AM EDT TUE SEP 9 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY...
  MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
  SOUTHEASTERN MORRIS COUNTY IN NORTHERN NEW JERSEY...
  SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  SOUTHEASTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 200 PM EDT

* AT 1000 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED HEAVY   
  RAIN, ASSOCIATED WITH THUNDERSTORMS, MOVING ACROSS THE REGION.     
  BETWEEN 1.00 AN 1.75 INCHES OF RAIN CAN BE EXPECTED IN ABOUT ONE   
  HOUR WITH THE HEAVIER STORMS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SERGEANTSVILLE...SAND BROOK...MILLINGTON...MARTINSVILLE...
  FLAGTOWN...CLOVERHILL...BRIDGEWATER...BELLE MEAD...BASKING RIDGE...
  SOMERVILLE...SOMERSET...SOCIETY HILL...SAYREVILLE...PERTH AMBOY...
  NORTH BRUNSWICK...NEW BRUNSWICK...MORRISTOWN...MILLSTONE...
  MIDDLESEX...MANVILLE...MADISON...FLEMINGTON...EDISON...EAST
  HANOVER...EAST BRUNSWICK...COLONIA...CARTERET AND BOUND BROOK

THE SOILS REMAIN VERY MOIST DUE TO THE 3.00 TO 6.00 INCHES OF RAIN 
TROPICAL STORM HANNA PRODUCED ON SATURDAY. BECAUSE OF THIS, RUNOFF 
FROM WITH THIS MORNINGS RAINFALL WILL BE GREATER THAN NORMAL. 

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. 
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE 
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS 
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY 
AUTOMOBILE.

LAT...LON 4049 7426 4044 7422 4026 7442 4017 7462
      4013 7460 4017 7468 4015 7472 4032 7493
      4040 7497 4041 7501 4092 7429 4089 7426
      4088 7433 4085 7431 4078 7437 4075 7435
      4066 7446 4066 7440 4059 7444 4059 7420

$$

KRUZDLO

1 follow-up statement

000 
WGUS71 KPHI 091718
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
118 PM EDT TUE SEP 9 2008

NJC019-021-023-027-035-091728-
/O.CAN.KPHI.FF.W.0037.000000T0000Z-080909T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MORRIS NJ-HUNTERDON NJ-SOMERSET NJ-MERCER NJ-MIDDLESEX NJ-
118 PM EDT TUE SEP 9 2008

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR MIDDLESEX...
MERCER...SOMERSET...SOUTHEASTERN HUNTERDON AND SOUTHEASTERN MORRIS
COUNTIES...

HEAVY RAIN ASSOCIATED WITH THE LINE OF THUNDERSTORMS HAS ENDED. 
WHILE SOME LIGHT RAIN WILL CONTINUE THIS AFTERNOON, EXCESSIVE RUNOFF 
IS NO LONGER EXPECTED. FOR THIS REASON, THE NATIONAL WEATHER SERVICE 
HAS CANCELLED THE FLASH FLOOD WARNING.  

LAT...LON 4049 7426 4044 7422 4026 7442 4017 7462
      4013 7460 4017 7468 4015 7472 4032 7493
      4040 7497 4041 7501 4092 7429 4089 7426
      4088 7433 4085 7431 4078 7437 4075 7435
      4066 7446 4066 7440 4059 7444 4059 7420

$$

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 9, 3:36 AM EDT	Small Craft Advisory	PHI		36 hr
Sep 9, 9:09 AM EDT	Areal Flood Advisory	PHI	Sussex, Warren	3 hr
Sep 9, 9:21 AM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Hunterdon, Mercer, Morris, Salem, Somerset and 2 more	39 min
Sep 9, 9:41 AM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Somerset	3 hr
Sep 9, 9:59 AM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester, Salem	3 hr
Sep 9, 10:57 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	48 min
Sep 9, 11:07 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	38 min
Sep 9, 11:50 AM EDT	Special Marine Warning	PHI		55 min
Sep 9, 12:11 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	49 min
Sep 9, 12:44 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	46 min
Sep 9, 1:05 PM EDT	Special Marine Warning	PHI		55 min
Sep 9, 1:07 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	53 min
Sep 9, 1:55 PM EDT	Special Marine Warning	PHI		65 min
Sep 9, 1:58 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	92 min
Sep 9, 2:42 PM EDT	Areal Flood Advisory	PHI	Cape May	3 hr
Sep 9, 2:53 PM EDT	Special Marine Warning	PHI		86 min

Nearby

Flash Flood Warnings in New Jersey, 2008 Every flash flood warning in 2008

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.