Alert archive / New Jersey / Flash Flood Warnings in 2008

Flash Flood Warning 18, NWS Philadelphia/Mount Holly

July 6, 2008Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 6, 2008, 4:53 PM EDT for Mercer County, New Jersey. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 6, 2008, 4:53 PM EDT (20:53 UTC)
Expired
Jul 6, 2008, 5:52 PM EDT
In force
59 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

County Mercer County, NJ

The radar

The Philadelphia radar (KDIX), 45 km from the middle of the area, began a volume at 20:56 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, 8.9 hours before the alert went out and 167 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 2008-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 61 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 12:00Z on 2008-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.193958Sfc1 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
61 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
641 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
129 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.

000 
WGUS51 KPHI 062053
FFWPHI
NJC021-070000-
/O.NEW.KPHI.FF.W.0018.080706T2053Z-080707T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
453 PM EDT SUN JUL 6 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY...

* UNTIL 800 PM EDT

* AT 447 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. RAINFALL
  ESTIMATES HAVE REACHED UP TO AROUND 1.5 INCHES WITH AN ADDITIONAL
  INCH OR TWO POSSIBLE.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WASHINGTON
  CROSSING...PRINCETON...PENNINGTON AND LAWRENCEVILLE

MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO 
CROSS WATER COVERED BRIDGES...DIPS...OR LOW WATER CROSSINGS. NEVER 
TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO 
ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

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 4023 7449 4017 7467 4017 7469 4015 7472
      4033 7492 4034 7486 4036 7486 4039 7474
      4037 7473 4039 7464 4036 7462 4034 7465
      4029 7454
TIME...MOT...LOC 2053Z 180DEG 0KT 4029 7466

$$

TFG
1 follow-up statement
000 
WGUS71 KPHI 062152
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
551 PM EDT SUN JUL 6 2008

NJC021-062201-
/O.CAN.KPHI.FF.W.0018.000000T0000Z-080707T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MERCER NJ-
551 PM EDT SUN JUL 6 2008

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR MERCER COUNTY...

THE THUNDERSTORMS WITH HEAVY RAIN HAVE DISSIPATED OR MOVED OUT OF 
THE COUNTY. 

LAT...LON 4023 7449 4017 7467 4017 7469 4015 7472
      4033 7492 4034 7486 4036 7486 4039 7474
      4037 7473 4039 7464 4036 7462 4034 7465
      4029 7454
TIME...MOT...LOC 2151Z 180DEG 0KT 4029 7466

$$
 
TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 1:57 PM EDTSpecial Marine WarningPHI86 min
Jul 6, 3:48 PM EDTFlash Flood WarningPHIBurlington104 min
Jul 6, 4:25 PM EDTAreal Flood AdvisoryPHICamden, Mercer72 min
Jul 6, 5:17 PM EDTFlash Flood WarningPHICamden71 min

Nearby

Flash Flood Warnings in New Jersey, 2008Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.